CN104518507A - Double-DSP (digital signal processor) single-phase grounding arc extinction equipment of power system - Google Patents
Double-DSP (digital signal processor) single-phase grounding arc extinction equipment of power system Download PDFInfo
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- CN104518507A CN104518507A CN201410800592.5A CN201410800592A CN104518507A CN 104518507 A CN104518507 A CN 104518507A CN 201410800592 A CN201410800592 A CN 201410800592A CN 104518507 A CN104518507 A CN 104518507A
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Abstract
The invention discloses double-DSP (digital signal processor) single-phase grounding arc extinction equipment of a power system. The double-DSP single-phase grounding arc extinction equipment comprises a current and voltage transformer signal acquisition circuit, a first DSP, an arc grounding processing device, a voltage transformer protecting device, a multi-way switch state information acquisition circuit and a second DSP. The current and voltage transformer signal acquisition circuit is used for receiving current and voltage state information of the power system; the first DSP is used for receiving the current and voltage state information of the power system and processing the signals in real time; the arc grounding processing device is used for carrying out arc extinction processing operation on single-phase arc grounding failures of circuits, and the voltage transformer protecting device is used for eliminating resonance so as to protect voltage transformers; the multi-way switch state information acquisition circuit is used for acquiring switch state information of the arc grounding processing device and switch state information of the voltage transformer protecting device; the second DSP is used for acquiring switch state information of the system and outputting control signals; data can be exchanged between the first DSP and the second DSP via a data exchange interface. The double-DSP single-phase grounding arc extinction equipment has the advantage that shortcomings of existing arc extinction coils and arc extinction cabinets can be overcome by the aid of the double-DSP single-phase grounding arc extinction equipment.
Description
Technical field
The present invention relates to a kind of electric power system two CSTR single-phase earthing extinguishing arc equipment, belong to electric power network security of operation control appliance manufacturing technology field.
Background technology
The domestic protection product for arc grounding fault mainly contains arc suppression coil and arc extinction cabinet two series products.Arc suppression coil exist defect be: arc suppression coil compensation be power frequency electric capacitance current, and the electric current being actually passed through earth point not only has power frequency electric capacitance current, also comprise a large amount of high-frequency currents and current in resistance property, time serious, only high-frequency current and current in resistance property just can the sustained combustions of pilot arc, can not accomplish complete blow-out; The existence of arc suppression coil, the exception of neutral point displacement voltage is caused to raise sometimes, increase the asymmetric of three-phase voltage, to the single-phase load of electrical network with apparatus insulatedly to have a negative impact, sometimes even busbar grounding signal can be reported, affect the safe operation of electrical network, so that some arc suppression coils can not put into operation for a long time, cause significant wastage; Use the resonator system of arc suppression coil, comparatively large in the technical difficulty of route selection, earthing wire-selecting accuracy rate is on the low side.The defect that arc extinction cabinet exists is: the recovery due to its protectiveness action is exactly the recovery of metallic earthing, the line capacitance of two healthy phases is in discharge condition, and fault phase is in charged state, large voltage disturbance is there is in three-phase system, very easily make the nonlinear inductance element in system be excited and cause resonance, burn out voltage transformer or its fuse is the shortcoming that it is difficult to overcome; Arc-extinction device controller judges arc light overvoltage by three-phase voltage and opening voltage; criterion is simple; very easily produce mistake; the phase if protection act is miscarried; or after protection act, have again other phases that ground connection occurs; to phase fault be caused, larger harm will be caused to electric power system, not meet the requirement of electric system protection device fail safe.Therefore, the protection scheme developing the new arc grounding fault that fail safe is good, reliability is high is further necessary.
Summary of the invention
The present invention is just for the deficiency that prior art exists; a kind of electric power system two CSTR single-phase earthing extinguishing arc equipment is provided; the deficiency that in prior art, arc suppression coil and arc extinction cabinet two series products exist can be overcome, meet the demand of electric power system arc grounding error protection.
For solving the problem, the technical solution used in the present invention is as follows:
A kind of electric power system two CSTR single-phase earthing extinguishing arc equipment, comprising:
For gathering the current transducer signal Acquisition Circuit of electric power system current state information, for gathering the voltage transformer signal acquisition circuit of power system voltage state information;
For the analog signal of described current transducer signal Acquisition Circuit and described voltage transformer signal acquisition circuit being converted to the analog to digital conversion circuit of digital signal;
For receiving signal that analog-digital conversion circuit as described exports and processing in real time signal and the first dsp processor of frequency-domain analysis;
For the single-phase arc grounding fault of circuit is carried out extinguishing arc processing operation arc grounding processing unit and for eliminating resonance to protect the voltage transformer protection device of voltage transformer;
For gathering the variable connector status information collection collector of described arc grounding processing unit and described voltage transformer protection device switching-state information;
For receiving signal that described variable connector status information collection collector exports and exporting the second dsp processor of control signal to described arc grounding processing unit and described voltage transformer protection device, be provided with the first buffer circuit between described second dsp processor and described variable connector status information collection collector, between described second dsp processor and described arc grounding processing unit, described voltage transformer protection device, be provided with the second buffer circuit;
Realized the exchange of data by data exchange interface between described first dsp processor and described second dsp processor.
As the improvement of technique scheme, described data exchange interface is McBSP multichannel buffer serial communication interface.
As the improvement of technique scheme, described arc grounding processing unit comprises the current limliting be connected in parallel on bus and regulates reactor, and described voltage transformer protection device comprises excess voltage suppressor and voltage transformer disconnector.
Compared with prior art, implementation result of the present invention is as follows in the present invention:
A kind of electric power system two CSTR single-phase earthing extinguishing arc equipment of the present invention, when system is arbitrary there is single-phase arc grounding mutually time, between the bus directly regulating reactor to be connected to fault phase current limliting and ground, the voltage at two ends, fault point is clamped down on the voltage at its two ends, destruction arc reignition mechanism, eliminate arc grounding, the capacitance current of fault point of simultaneously having released, the injury to voltage transformer when effectively avoiding protection act to recover; Secondly, installed voltage transformer disconnector additional at voltage transformer primary side neutral point, made voltage transformer can depart from resonance region when being necessary, the generation of voltage transformer resonance can be prevented; Again, in this equipment, be also provided with excess voltage suppressor, traditional overvoltage protection device effectively can be avoided because through-current capacity is too small and anti-phase overvoltage causes the danger of blast itself, reliably inhibit alternate overvoltage and relatively overvoltage; In addition, the present invention adopts two high performance dsp processors as calculation and control core, front-end configuration high-precision voltage and current signal communication sample circuit, a processor is for collecting ac sampling signal and processing in real time and frequency-domain analysis signal; Another processor is used for exporting control system switching state acquisition, system, ensure that process and the response speed of device.
Accompanying drawing explanation
Fig. 1 is a kind of electric power system two CSTR single-phase earthing extinguishing arc device structure schematic diagram of the present invention.
Embodiment
Below in conjunction with specific embodiments content of the present invention is described.
As shown in Figure 1, be a kind of electric power system two CSTR single-phase earthing extinguishing arc device structure schematic diagram of the present invention.A kind of electric power system two CSTR single-phase earthing extinguishing arc equipment of the present invention, comprising:
For gathering the current transducer signal Acquisition Circuit of electric power system current state information, for gathering the voltage transformer signal acquisition circuit of power system voltage state information; For the analog signal of described current transducer signal Acquisition Circuit and described voltage transformer signal acquisition circuit being converted to the analog to digital conversion circuit of digital signal; For receiving signal that analog-digital conversion circuit as described exports and processing in real time signal and the first dsp processor of frequency-domain analysis.
For the single-phase arc grounding fault of circuit is carried out extinguishing arc processing operation arc grounding processing unit and for eliminating resonance to protect the voltage transformer protection device of voltage transformer; Described arc grounding processing unit comprises the current limliting be connected in parallel on bus and regulates reactor, and described voltage transformer protection device comprises excess voltage suppressor and voltage transformer disconnector; For gathering the variable connector status information collection collector of described arc grounding processing unit and described voltage transformer protection device switching-state information; For receiving signal that described variable connector status information collection collector exports and exporting the second dsp processor of control signal to described arc grounding processing unit and described voltage transformer protection device; be provided with the first buffer circuit between described second dsp processor and described variable connector status information collection collector, between described second dsp processor and described arc grounding processing unit, described voltage transformer protection device, be provided with the second buffer circuit.
Realized the exchange of data by data exchange interface between described first dsp processor and described second dsp processor; Particularly, described data exchange interface is McBSP multichannel buffer serial communication interface.
By electric current, the voltage data of current transducer signal Acquisition Circuit and voltage transformer signal acquisition circuit Real-time Collection electrical network, after the first dsp processor computing, obtain the parameters of electric power needed.The state information of described voltage transformer protection device and described arc grounding processing unit is gathered with timer; by the cooperated computing of described first dsp processor and described second dsp processor; differentiation is carried out and generating process scheme to the location of high-pressure system earth fault; export control signal by described second dsp processor to described voltage transformer protection device and described arc grounding processing unit, arc light when realizing high voltage supply system generation arc grounding is eliminated and the protection of voltage transformer.Particularly, when system is arbitrary there is single-phase arc grounding mutually time, between the bus directly regulating reactor to be connected to fault phase current limliting and ground, the voltage at two ends, fault point is clamped down on the voltage at its two ends, destruction arc reignition mechanism, eliminate arc grounding, the capacitance current of fault point of simultaneously having released, the injury to voltage transformer when effectively avoiding protection act to recover; Meanwhile, in order to prevent the generation of voltage transformer resonance, installing a voltage transformer disconnector additional at voltage transformer primary side neutral point, making voltage transformer can depart from resonance region when being necessary; Again, in this equipment, be also provided with excess voltage suppressor, traditional overvoltage protection device effectively can be avoided because through-current capacity is too small and anti-phase overvoltage causes the danger of blast itself, reliably inhibit alternate overvoltage and relatively overvoltage.
Above content is detailed description made for the present invention in conjunction with specific embodiments, can not assert that the present invention specifically implements to be only limitted to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to the scope of protection of the invention.
Claims (3)
1. an electric power system two CSTR single-phase earthing extinguishing arc equipment, is characterized in that, comprising:
For gathering the current transducer signal Acquisition Circuit of electric power system current state information, for gathering the voltage transformer signal acquisition circuit of power system voltage state information;
For the analog signal of described current transducer signal Acquisition Circuit and described voltage transformer signal acquisition circuit being converted to the analog to digital conversion circuit of digital signal;
For receiving signal that analog-digital conversion circuit as described exports and processing in real time signal and the first dsp processor of frequency-domain analysis;
For the single-phase arc grounding fault of circuit is carried out extinguishing arc processing operation arc grounding processing unit and for eliminating resonance to protect the voltage transformer protection device of voltage transformer;
For gathering the variable connector status information collection collector of described arc grounding processing unit and described voltage transformer protection device switching-state information;
For receiving signal that described variable connector status information collection collector exports and exporting the second dsp processor of control signal to described arc grounding processing unit and described voltage transformer protection device, be provided with the first buffer circuit between described second dsp processor and described variable connector status information collection collector, between described second dsp processor and described arc grounding processing unit, described voltage transformer protection device, be provided with the second buffer circuit;
Realized the exchange of data by data exchange interface between described first dsp processor and described second dsp processor.
2. a kind of electric power system two CSTR single-phase earthing extinguishing arc equipment as claimed in claim 1, it is characterized in that, described data exchange interface is McBSP multichannel buffer serial communication interface.
3. a kind of electric power system two CSTR single-phase earthing extinguishing arc equipment as claimed in claim 1; it is characterized in that; described arc grounding processing unit comprises the current limliting be connected in parallel on bus and regulates reactor, and described voltage transformer protection device comprises excess voltage suppressor and voltage transformer disconnector.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410800592.5A CN104518507A (en) | 2014-12-22 | 2014-12-22 | Double-DSP (digital signal processor) single-phase grounding arc extinction equipment of power system |
| CN201420816633.5U CN204333950U (en) | 2014-12-22 | 2014-12-22 | A kind of electric power system two CSTR single-phase earthing extinguishing arc equipment |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410800592.5A CN104518507A (en) | 2014-12-22 | 2014-12-22 | Double-DSP (digital signal processor) single-phase grounding arc extinction equipment of power system |
| CN201420816633.5U CN204333950U (en) | 2014-12-22 | 2014-12-22 | A kind of electric power system two CSTR single-phase earthing extinguishing arc equipment |
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| Publication Number | Publication Date |
|---|---|
| CN104518507A true CN104518507A (en) | 2015-04-15 |
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| CN201410800592.5A Pending CN104518507A (en) | 2014-12-22 | 2014-12-22 | Double-DSP (digital signal processor) single-phase grounding arc extinction equipment of power system |
| CN201420816633.5U Expired - Fee Related CN204333950U (en) | 2014-12-22 | 2014-12-22 | A kind of electric power system two CSTR single-phase earthing extinguishing arc equipment |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420816633.5U Expired - Fee Related CN204333950U (en) | 2014-12-22 | 2014-12-22 | A kind of electric power system two CSTR single-phase earthing extinguishing arc equipment |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104518507A (en) * | 2014-12-22 | 2015-04-15 | 安徽凯川电力保护设备有限公司 | Double-DSP (digital signal processor) single-phase grounding arc extinction equipment of power system |
| CN106786472A (en) * | 2015-11-24 | 2017-05-31 | 合肥亚飞电力设备有限公司 | A kind of digital arc extinction cabinet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201956666U (en) * | 2011-01-21 | 2011-08-31 | 合肥徽力电气技术有限公司 | High-voltage flexible safety device |
| CN202127233U (en) * | 2011-06-16 | 2012-01-25 | 安徽国科电力设备有限公司 | Power grid fault measuring and controlling device |
| US20120206843A1 (en) * | 2009-07-23 | 2012-08-16 | Enphase Energy, Inc. | Method and apparatus for detection and control of dc arc faults |
| CN203645320U (en) * | 2013-12-10 | 2014-06-11 | 河北伟正电力技术有限公司 | Active voltage-regulating type arc extinction voltage-limiting protection device used for low-current grounding system |
| CN204333950U (en) * | 2014-12-22 | 2015-05-13 | 安徽凯川电力保护设备有限公司 | A kind of electric power system two CSTR single-phase earthing extinguishing arc equipment |
-
2014
- 2014-12-22 CN CN201410800592.5A patent/CN104518507A/en active Pending
- 2014-12-22 CN CN201420816633.5U patent/CN204333950U/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120206843A1 (en) * | 2009-07-23 | 2012-08-16 | Enphase Energy, Inc. | Method and apparatus for detection and control of dc arc faults |
| CN201956666U (en) * | 2011-01-21 | 2011-08-31 | 合肥徽力电气技术有限公司 | High-voltage flexible safety device |
| CN202127233U (en) * | 2011-06-16 | 2012-01-25 | 安徽国科电力设备有限公司 | Power grid fault measuring and controlling device |
| CN203645320U (en) * | 2013-12-10 | 2014-06-11 | 河北伟正电力技术有限公司 | Active voltage-regulating type arc extinction voltage-limiting protection device used for low-current grounding system |
| CN204333950U (en) * | 2014-12-22 | 2015-05-13 | 安徽凯川电力保护设备有限公司 | A kind of electric power system two CSTR single-phase earthing extinguishing arc equipment |
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Application publication date: 20150415 |