CN112366733A - Method, device, system and medium for optimizing PID (proportion integration differentiation) parameters of speed regulator of hydroelectric generating set - Google Patents
Method, device, system and medium for optimizing PID (proportion integration differentiation) parameters of speed regulator of hydroelectric generating set Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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Abstract
The invention discloses a hydroelectric generating set speed regulator PID parameter optimization method, which comprises the following steps: determining a hydroelectric generating set needing to optimize a speed regulator PID parameter; performing fault simulation according to the fault condition of the power grid power to obtain a corresponding mechanical power curve; determining corresponding oscillation frequency and period according to the mechanical power curve, and calculating the curve fluctuation amount and curve offset; and correspondingly adjusting PID parameters according to the curve fluctuation amount and the curve offset until the PID parameter adjustment times reach preset parameter optimization times. The embodiment of the invention also discloses a device, a system and a medium for optimizing the PID parameters of the speed regulator of the hydroelectric generating set, which effectively solve the problem that the ultra-low frequency oscillation phenomenon of a power grid system is caused by insufficient frequency modulation speed easily in the prior art.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a method, a device, a system and a medium for optimizing PID parameters of a speed regulator of a hydroelectric generating set.
Background
At present, the PID parameter optimization method of the main hydroelectric generating set speed regulator mainly aims at optimizing a single hydroelectric generating set or a single power plant. According to the practical situation of a power grid (Yunnan power grid), the speed regulation performance of each hydroelectric generating set is connected into a whole through system frequency, 50 or more hydroelectric generating sets need to be optimized simultaneously, and the traditional optimization scheme is difficult to find reasonable parameters in limited time. Even if a heuristic algorithm is adopted for searching step by step, the values of the proportional coefficient Kp and the integral coefficient Ki of the PID systems of each unit are gradually adjusted and increased, so that the Kp stops searching on a small value, the frequency modulation speed is easy to be insufficient, and the phenomenon of ultralow frequency oscillation of a power grid system is caused.
Disclosure of Invention
The embodiment of the invention provides a method, a device, a system and a medium for optimizing PID parameters of a hydroelectric generating set speed regulator, which can effectively solve the problem that the ultra-low frequency oscillation phenomenon of a power grid system is caused by insufficient frequency modulation speed in the prior art.
An embodiment of the invention provides a method for optimizing PID parameters of a hydro-power generating unit speed regulator, which comprises the following steps:
determining a hydroelectric generating set needing to optimize a speed regulator PID parameter;
performing fault simulation according to the fault condition of the power grid power to obtain a corresponding mechanical power curve;
determining corresponding oscillation frequency and period according to the mechanical power curve, and calculating the curve fluctuation amount and curve offset;
and correspondingly adjusting PID parameters according to the curve fluctuation amount and the curve offset until the PID parameter adjustment times reach preset parameter optimization times.
As an improvement of the above scheme, the PID parameters include: a proportionality coefficient, an integral coefficient, and a differential coefficient.
As an improvement of the above scheme, the method adjusts the PID parameters by the following steps, specifically including:
correspondingly adjusting the proportionality coefficient according to the curve fluctuation amount;
and correspondingly adjusting the integral coefficient according to the curve offset and the curve fluctuation amount.
As an improvement of the above scheme, the adjusting the integral coefficient according to the curve offset in combination with the curve fluctuation amount includes:
selecting a unit with the minimum curve offset from the hydroelectric generating sets, and correspondingly reducing the curve offset when the curve fluctuation amount of the unit with the minimum curve offset is smaller than a preset first threshold;
and selecting the unit with the maximum curve offset in the hydroelectric generating sets, and correspondingly increasing the curve offset when the curve fluctuation amount of the unit with the maximum curve offset is larger than a preset second threshold value.
As an improvement of the above scheme, the determining a corresponding oscillation frequency and period according to a mechanical power curve, and calculating a curve fluctuation amount and a curve offset amount specifically include:
calculating to obtain a steady state regulating variable according to the mechanical power curve;
and calculating the curve fluctuation amount and the curve offset according to the steady-state regulating amount.
As an improvement of the above scheme, the calculating according to the mechanical power curve to obtain the steady-state adjustment amount specifically includes:
AD(k)＝(Ff-Fref-Sq(k)*Fref)/Fref/Ep(k)；
AD (k) is a steady-state regulating quantity of the power of the kth hydroelectric generating set, Ff is a steady-state frequency of the power grid system after disturbance is finished, Fref is a standard frequency of the power grid system, sq (k) is a PID regulating dead zone of the kth hydroelectric generating set, and Ep (k) is a difference regulating coefficient of the kth hydroelectric generating set.
As an improvement of the above scheme, the calculating a curve fluctuation amount and a curve offset amount according to the steady-state adjustment amount specifically includes:
BD(k)＝(Pmax(k)-Pmin(k))/AD(k)；
PY(k)＝(2*Pinit(k)-Pmax(k)-Pmin(k)-2*AD(k))/AD(k)；
PY (k) is curve offset, BD (k) is curve fluctuation amount, Pinit (k) is mechanical power of the kth generator at the time of 0, Pmin (k) is the minimum value of the 2 nd pendulum of the mechanical power, Pmax (k) is the maximum value of the 2.5 th pendulum of the mechanical power, and AD (k) is steady-state regulation of the power of the kth hydroelectric generating set.
Another embodiment of the present invention correspondingly provides a device for optimizing PID parameters of a speed regulator of a hydroelectric generating set, including:
the determination module is used for determining a hydroelectric generating set needing to be subjected to PID parameter optimization of the speed regulator;
the simulation module is used for carrying out fault simulation according to the fault condition of the power grid power to obtain a corresponding mechanical power curve;
the calculation module is used for determining the corresponding oscillation frequency and period according to the mechanical power curve and calculating the curve fluctuation amount and the curve offset;
and the adjusting module is used for correspondingly adjusting the PID parameters according to the curve fluctuation amount and the curve offset until the PID parameter adjusting times reach the preset parameter optimization times.
Another embodiment of the present invention provides a system for optimizing PID parameters of a hydro-power generating unit speed regulator, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, where the processor, when executing the computer program, implements the method for optimizing PID parameters of a hydro-power generating unit speed regulator according to the above embodiment of the present invention.
Another embodiment of the present invention provides a storage medium, where the computer-readable storage medium includes a stored computer program, where when the computer program runs, a device where the computer-readable storage medium is located is controlled to execute the method for optimizing the PID parameters of the hydro-power generating unit speed regulator according to the above embodiment of the present invention.
Compared with the prior art, the method for optimizing the PID parameters of the speed regulator of the hydro-power generating unit disclosed by the embodiment of the invention has the advantages that when the hydro-power generating unit fails, the frequency modulation characteristic of the hydro-power generating unit is obtained by simulating a mechanical power curve after the failure, the curve fluctuation amount and the curve offset amount are obtained by calculation according to the mechanical power curve, and the PID parameters are adjusted according to the curve fluctuation amount and the curve offset amount until the adjustment times meet the parameter optimization times. And the optimization target is clear, the optimization is carried out on the whole, and the local optimal solution cannot be trapped. Even if the number of the hydroelectric generating sets is increased, the problem of obvious increase of consumed time is avoided, and the frequency modulation speed is effectively controlled, so that the phenomenon of ultralow frequency oscillation of a power grid system is avoided.
Drawings
FIG. 1 is a schematic flow chart of a method for optimizing PID parameters of a hydro-power generating unit speed regulator according to an embodiment of the invention;
FIG. 2 is a schematic illustration of a mechanical power curve in a method for optimizing a PID parameter of a hydro-power unit governor according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram illustrating PID parameter optimization of a hydro-power generating unit speed regulator according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a system for optimizing PID parameters of a hydro-power generating unit speed regulator according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a schematic flow chart of a method for optimizing PID parameters of a hydro-power generating unit speed regulator according to an embodiment of the present invention is shown.
An embodiment of the invention provides a method for optimizing PID parameters of a hydro-power generating unit speed regulator, which comprises the following steps:
and S10, determining the hydroelectric generating set needing the PID parameter optimization of the speed regulator.
It should be noted that, a hydro-power unit which needs to optimize the PID parameters of the speed regulator in the large power grid is determined, and the hydro-power unit is numbered as 1,2, … …, n in sequence, and this step is used to eliminate a hydro-power unit which has no PID speed regulator or has a speed regulator but has unadjustable parameters, or has little influence on the power grid system due to too small power, so as to reduce the calculation amount. It will be appreciated that hydro-electric units of too low power, e.g. less than 100MW, may be excluded from consideration by setting a threshold. And whether the governor has PID regulation capability can be determined by the prior art.
And S20, performing fault simulation according to the fault condition of the power grid power to obtain a corresponding mechanical power curve.
In this embodiment, the fault condition of the grid power may be a single-pole blocking of a certain return direct current of the grid system, or may be another fault that causes a mismatch of the grid system power, and after the fault condition is obtained, the grid system is simulated, so as to obtain a mechanical power curve.
And S30, determining the corresponding oscillation frequency and period according to the mechanical power curve, and calculating the curve fluctuation amount and the curve offset.
In the present embodiment, information of the frequency F, the period T, and the like of the oscillation is obtained by the Prony analysis. And calculating the curve fluctuation amount and the curve offset according to the mechanical power curve, thereby determining the frequency modulation characteristic of the power grid system.
And S40, correspondingly adjusting the PID parameters according to the curve fluctuation amount and the curve offset until the PID parameter adjustment times reach the preset parameter optimization times.
Wherein the PID parameters include: a proportionality coefficient, an integral coefficient, and a differential coefficient. In this embodiment, the proportional coefficient, the integral coefficient, and the differential coefficient are set to have large values, thereby ensuring the speed of frequency modulation. For example, let Kp be 5.0; ki is 2.0; kd remained the same value. The preset parameter optimization times may be 100, or may be other times, and are not limited herein. If the number of times of adjustment is less than a fixed value n times, the search is ended. For example, n may take the value 5.
In summary, when the hydro-power generating unit fails, the frequency modulation characteristic of the hydro-power generating unit is obtained through the simulated mechanical power curve after the failure, the curve fluctuation amount and the curve offset amount are obtained through calculation according to the mechanical power curve, and the PID parameters are adjusted according to the curve fluctuation amount and the curve offset amount until the adjustment times meet the parameter optimization times. And the optimization target is clear, the optimization is carried out on the whole, and the local optimal solution cannot be trapped. Even if the number of the hydroelectric generating sets is increased, the problem of obvious increase of consumed time is avoided, and the frequency modulation speed is effectively controlled, so that the phenomenon of ultralow frequency oscillation of a power grid system is avoided.
As an improvement of the above scheme, the determining a corresponding oscillation frequency and period according to a mechanical power curve, and calculating a curve fluctuation amount and a curve offset amount specifically include:
and calculating to obtain a steady-state regulating variable according to the mechanical power curve.
And calculating the curve fluctuation amount and the curve offset according to the steady-state regulating amount.
Further, the calculating according to the mechanical power curve to obtain a steady-state adjustment amount specifically includes:
AD(k)＝(Ff-Fref-Sq(k)*Fref)/Fref/Ep(k)；
AD (k) is a steady-state regulating quantity of the power of the kth hydroelectric generating set, Ff is a steady-state frequency of the power grid system after disturbance is finished, Fref is a standard frequency of the power grid system, sq (k) is a PID regulating dead zone of the kth hydroelectric generating set, and Ep (k) is a difference regulating coefficient of the kth hydroelectric generating set.
Further, the calculating a curve fluctuation amount and a curve offset amount according to the steady-state adjustment amount specifically includes:
BD(k)＝(Pmax(k)-Pmin(k))/AD(k)；
PY(k)＝(2*Pinit(k)-Pmax(k)-Pmin(k)-2*AD(k))/AD(k)；
PY (k) is curve offset, BD (k) is curve fluctuation amount, Pinit (k) is mechanical power of the kth generator at the time of 0, Pmin (k) is the minimum value of the 2 nd pendulum of the mechanical power, Pmax (k) is the maximum value of the 2.5 th pendulum of the mechanical power, and AD (k) is steady-state regulation of the power of the kth hydroelectric generating set.
In the present exemplary embodiment, the minimum value pmin (k) of the 2 nd pendulum of the mechanical power, the maximum value pmax (k) of the 2 nd pendulum of the mechanical power, and the steady-state manipulated variable ad (k) are obtained for the kth hydroelectric power installation under consideration, see fig. 2. And outputting a mechanical power curve of the hydroelectric generating set k after fault simulation. And calculates the output steady-state adjustment amount ad (k). Note that the definition of "2 nd pendulum" is: the time is a curve corresponding to 1.5T-2.5T after the fault occurs, and T is the period measured in (2). Pmin (k) is the minimum value of the mechanical power in the time interval of 1.5T-2.5T. "pendulum 2.5" is defined as: the time is a curve corresponding to 2.0T-3.0T after the fault occurs, and T is the period measured in (2). Pmax (k) is the maximum value of the mechanical power in the time interval of 2.0T-3.0T.
As an improvement of the above scheme, the method adjusts the PID parameters by the following steps, specifically including:
and correspondingly adjusting the proportionality coefficient according to the curve fluctuation amount.
And correspondingly adjusting the integral coefficient according to the curve offset and the curve fluctuation amount.
Specifically, the curve fluctuation amounts and the curve offsets of all the hydroelectric generating sets are sequenced, the hydroelectric generating sets with the optimal curve fluctuation amounts and the worst curve offsets in the power grid system are obtained, and PID parameters are adjusted, so that the frequency modulation speed is guaranteed.
Further, correspondingly adjusting the integral coefficient according to the curve offset in combination with the curve fluctuation amount specifically includes:
selecting a unit with the minimum curve offset from the hydroelectric generating sets, and correspondingly reducing the curve offset when the curve fluctuation amount of the unit with the minimum curve offset is smaller than a preset first threshold;
and selecting the unit with the maximum curve offset in the hydroelectric generating sets, and correspondingly increasing the curve offset when the curve fluctuation amount of the unit with the maximum curve offset is larger than a preset second threshold value.
In this embodiment, for the minimum hydroelectric generating set bd (k), if bd (k) is less than 0.14, the proportionality coefficient is increased by 0.05 on the current value.
For the largest hydroelectric generating set BD (k), if BD (k) is greater than 0.18, the proportionality coefficient is reduced by 0.05 on the current value.
For the hydroelectric generating set with the smallest PY (k), if BD (k) is less than-0.02, the integral coefficient is reduced by 0.01 on the current value.
For the hydroelectric generating set with the maximum PY (k), if BD (k) is greater than 0.02, the integral coefficient of the hydroelectric generating set is increased by 0.01 on the current value.
It should be noted that the second threshold may be set according to a lot of experiments, and is not limited herein.
Referring to fig. 3, a schematic structural diagram of a device for optimizing PID parameters of a hydro-power generating unit speed regulator according to an embodiment of the present invention is shown.
Another embodiment of the present invention correspondingly provides a device for optimizing PID parameters of a speed regulator of a hydroelectric generating set, including:
the determination module is used for determining a hydroelectric generating set needing to be subjected to PID parameter optimization of the speed regulator;
the simulation module is used for carrying out fault simulation according to the fault condition of the power grid power to obtain a corresponding mechanical power curve;
the calculation module is used for determining the corresponding oscillation frequency and period according to the mechanical power curve and calculating the curve fluctuation amount and the curve offset;
and the adjusting module is used for correspondingly adjusting the PID parameters according to the curve fluctuation amount and the curve offset until the PID parameter adjusting times reach the preset parameter optimization times.
According to the method for optimizing the PID parameters of the speed regulator of the hydro-power generating unit, provided by the embodiment of the invention, when the hydro-power generating unit fails, the frequency modulation characteristic of the hydro-power generating unit is obtained through simulating a mechanical power curve after the failure, the curve fluctuation amount and the curve offset are obtained through calculation according to the mechanical power curve, and the PID parameters are adjusted according to the curve fluctuation amount and the curve offset until the adjustment times meet the parameter optimization times. And the optimization target is clear, the optimization is carried out on the whole, and the local optimal solution cannot be trapped. Even if the number of the hydroelectric generating sets is increased, the problem of obvious increase of consumed time is avoided, and the frequency modulation speed is effectively controlled, so that the phenomenon of ultralow frequency oscillation of a power grid system is avoided.
Referring to fig. 4, a schematic diagram of a system for optimizing PID parameters of a hydro-power generating unit speed regulator according to an embodiment of the present invention is shown. The hydroelectricity unit speed regulator PID parameter optimization system of this embodiment includes: a processor 11, a memory 12 and a computer program stored in said memory and executable on said processor 11. The processor 11, when executing the computer program, implements the steps in the above-described embodiments of the face tracking method. Alternatively, the processor 11 implements the functions of the modules/units in the above-described device embodiments when executing the computer program.
Illustratively, the computer program may be partitioned into one or more modules/units that are stored in the memory and executed by the processor to implement the invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution process of the computer program in the hydro-power generating unit governor PID parameter optimization system.
The system for optimizing the PID parameters of the speed regulator of the hydroelectric generating set can be computing equipment such as a desktop computer, a notebook computer, a palm computer and a cloud server. The hydro-power generating unit speed regulator PID parameter optimization system can comprise, but is not limited to, a processor and a memory. Those skilled in the art will appreciate that the schematic is merely an example of a hydroelectric generating set speed regulator PID parameter optimization system, and does not constitute a limitation of a hydroelectric generating set speed regulator PID parameter optimization system, and may include more or fewer components than shown, or some components in combination, or different components, for example, the hydroelectric generating set speed regulator PID parameter optimization system may further include input and output devices, network access devices, buses, etc.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general processor can be a microprocessor or the processor can also be any conventional processor and the like, the processor is a control center of the hydroelectric generating set speed regulator PID parameter optimization system, and various interfaces and lines are utilized to connect all parts of the whole hydroelectric generating set speed regulator PID parameter optimization system.
The memory may be used to store the computer program and/or module, and the processor may implement various functions of the hydrokinetic unit governor PID parameter optimization system by running or executing the computer program and/or module stored in the memory and invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Wherein, the module/unit integrated by the hydroelectric generating set speed regulator PID parameter optimization system can be stored in a computer readable storage medium if the module/unit is realized in the form of a software functional unit and is sold or used as an independent product. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A hydro-power generating unit speed regulator PID parameter optimization method is characterized by comprising the following steps:
determining a hydroelectric generating set needing to optimize a speed regulator PID parameter;
performing fault simulation according to the fault condition of the power grid power to obtain a corresponding mechanical power curve;
determining corresponding oscillation frequency and period according to the mechanical power curve, and calculating the curve fluctuation amount and curve offset;
and correspondingly adjusting PID parameters according to the curve fluctuation amount and the curve offset until the PID parameter adjustment times reach preset parameter optimization times.
2. The method of optimizing a hydro-power generating unit governor PID parameter of claim 1, wherein the PID parameter comprises: a proportionality coefficient, an integral coefficient, and a differential coefficient.
3. The optimization method of the PID parameters of the hydro-power generating unit speed regulator according to claim 2, characterized in that the method adjusts the PID parameters by the following steps, including in particular:
correspondingly adjusting the proportionality coefficient according to the curve fluctuation amount;
and correspondingly adjusting the integral coefficient according to the curve offset and the curve fluctuation amount.
4. The method for optimizing the PID parameters of the hydro-power generating unit speed regulator according to claim 3, wherein the corresponding adjustment of the integral coefficient according to the curve offset in combination with the curve fluctuation amount specifically comprises:
selecting a unit with the minimum curve offset from the hydroelectric generating sets, and correspondingly reducing the curve offset when the curve fluctuation amount of the unit with the minimum curve offset is smaller than a preset first threshold;
and selecting the unit with the maximum curve offset in the hydroelectric generating sets, and correspondingly increasing the curve offset when the curve fluctuation amount of the unit with the maximum curve offset is larger than a preset second threshold value.
5. The method for optimizing PID parameters of a hydro-power generating unit speed regulator according to claim 1, wherein the determining of the corresponding oscillation frequency and period according to the mechanical power curve and the calculating of the curve fluctuation amount and the curve offset amount specifically comprise:
calculating to obtain a steady state regulating variable according to the mechanical power curve;
and calculating the curve fluctuation amount and the curve offset according to the steady-state regulating amount.
6. The method for optimizing the PID parameters of a hydro-power generating unit speed regulator according to claim 5, wherein the calculating of the steady state adjustment quantity according to the mechanical power curve specifically includes:
AD(k)＝(Ff-Fref-Sq(k)*Fref)/Fref/Ep(k)；
AD (k) is a steady-state regulating quantity of the power of the kth hydroelectric generating set, Ff is a steady-state frequency of the power grid system after disturbance is finished, Fref is a standard frequency of the power grid system, sq (k) is a PID regulating dead zone of the kth hydroelectric generating set, and Ep (k) is a difference regulating coefficient of the kth hydroelectric generating set.
7. The method for optimizing the PID parameters of the hydro-power generating unit speed regulator according to claim 6, wherein the calculating of the curve fluctuation amount and the curve offset amount according to the steady state adjustment amount specifically includes:
BD(k)＝(Pmax(k)-Pmin(k))/AD(k)；
PY(k)＝(2*Pinit(k)-Pmax(k)-Pmin(k)-2*AD(k))/AD(k)；
PY (k) is curve offset, BD (k) is curve fluctuation amount, Pinit (k) is mechanical power of the kth generator at the time of 0, Pmin (k) is the minimum value of the 2 nd pendulum of the mechanical power, Pmax (k) is the maximum value of the 2.5 th pendulum of the mechanical power, and AD (k) is steady-state regulation of the power of the kth hydroelectric generating set.
8. A hydroelectric generating set speed regulator PID parameter optimization device is characterized by comprising:
the determination module is used for determining a hydroelectric generating set needing to be subjected to PID parameter optimization of the speed regulator;
the simulation module is used for carrying out fault simulation according to the fault condition of the power grid power to obtain a corresponding mechanical power curve;
the calculation module is used for determining the corresponding oscillation frequency and period according to the mechanical power curve and calculating the curve fluctuation amount and the curve offset;
and the adjusting module is used for correspondingly adjusting the PID parameters according to the curve fluctuation amount and the curve offset until the PID parameter adjusting times reach the preset parameter optimization times.
9. A hydroelectric generating set speed regulator PID parameter optimization system comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the computer program when executed by the processor implementing the hydroelectric generating set speed regulator PID parameter optimization method of any of claims 1 to 7.
10. A computer-readable storage medium, comprising a stored computer program, wherein the computer program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform a method for optimizing hydrokinetic unit governor PID parameters as defined in any of claims 1 to 7.
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| CN115774930A (en) * | 2022-11-24 | 2023-03-10 | 国网新疆电力有限公司电力科学研究院 | Parameter optimization configuration method and device for speed regulating system of hydroelectric generating set |
| CN117728439A (en) * | 2023-11-06 | 2024-03-19 | 西南交通大学 | On-line evaluation method for frequency oscillation inhibition capability of hydroelectric generating set |
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