CN105607674A - Control device for high voltage switch cabinet - Google Patents

Abstract

The invention provides a maintenance and control device for a high-voltage switchgear, a maintenance and control device for a high-voltage switchgear, comprising: a temperature sensor, a microprocessor, a ventilation mechanism, an air pressure monitoring mechanism, and a gas sensor; The results determine the state of the high-voltage switchgear, and judge whether the high-voltage switchgear is abnormal according to the detection results of the air pressure monitoring unit. When the high-voltage switchgear is abnormal, the interior of the high-voltage switchgear is decompressed by adjusting the exhaust volume of the ventilation mechanism; The processor is also used to receive the temperature collected by the temperature sensor, and when the temperature value exceeds the preset temperature upper limit, control the ventilation mechanism to ventilate the high-voltage switch cabinet. The temperature of the high-voltage switchgear is precisely controlled, and the temperature of the high-voltage switchgear is maintained within a certain range, thereby effectively prolonging the life of the high-voltage switchgear.

Description

A maintenance and control device for a high-voltage switchgear

technical field

The invention relates to the field of high-voltage switch cabinets, in particular to a maintenance and control device for high-voltage switch cabinets.

Background technique

With the sustainable development of my country's economy and the continuous improvement of people's material and cultural living standards, users' demand for electricity is increasing, and the quality and reliability of power supply are getting higher and higher. As electricity enters the market as a commodity and accepts the supervision and selection of users, the responsibility of power operators will be investigated for the impact of power outages in the power supply. Therefore, it is particularly important to speed up the transformation of urban and rural power grids and the automation of power distribution systems. .

High-voltage switchgear is an important equipment in the power transmission and distribution system. It undertakes important functions such as starting and closing power lines. With the growth of my country's total economic volume, the requirements for power systems are getting higher and higher. put forward higher requirements. At present, the monitoring of high-voltage switchgear is mostly based on manual inspection, and the temperature inside the switchgear is obtained by means of infrared temperature measurement equipment. Due to the relatively complicated structure of the switchgear, when the components are blocked, the infrared thermometer often cannot obtain accurate data. temperature data, and the inspection interval is long. Moreover, most of them only measure the temperature of the high-voltage switchgear, and cannot diagnose the working status of the entire high-voltage switchgear. As a high-voltage switchgear widely used in power transmission and distribution systems, it is very necessary to implement condition-based maintenance for it.

Contents of the invention

In order to overcome the deficiencies in the above-mentioned prior art, the object of the present invention is to provide a maintenance and control device for a high-voltage switchgear, including: a temperature sensor, a microprocessor, a ventilation mechanism, an air pressure monitoring mechanism and a gas sensor;

The temperature sensor is used to collect the temperature of the bus bar in the high-voltage switch cabinet and the electrical components in the high-voltage switch cabinet, and output the collected temperature to the microprocessor;

The gas sensor is arranged outside the high-voltage switchgear, and is used to detect the component content of the gas discharged from the high-voltage switchgear by the ventilation mechanism;

The air pressure monitoring unit is arranged inside the high-voltage switch cabinet for real-time detection of the air pressure inside the high-voltage switch cabinet, and transmits the detection result to the microprocessor in real time;

The microprocessor is used to determine the state of the high-voltage switchgear according to the detection result of the gas sensor, and judge whether the high-voltage switchgear is abnormal according to the detection result of the air pressure monitoring unit. The amount decompresses the interior of the high-voltage switchgear; the microprocessor is also used to receive the temperature collected by the temperature sensor. Ventilate inside.

Preferably, it also includes: a humidity detection module;

The humidity detection module is used to detect the humidity in the high-voltage switch cabinet, and output the collected humidity to the microprocessor.

Preferably, it also includes: a heating mechanism;

When the humidity value in the high-voltage switch cabinet received by the microprocessor exceeds the preset humidity upper limit, the microprocessor controls the heating mechanism to heat the high-voltage switch cabinet.

Preferably, it also includes: a cabinet door sensing module;

The cabinet door sensing module is used to sense the opening or closing of the high-voltage switch cabinet door, and when the cabinet door sensing module senses that the high-voltage switch cabinet is opened, a prompt message is sent.

Preferably, the cabinet door sensing module uses a magnetic switch to sense the switch state of the cabinet door.

Preferably, the temperature sensor is arranged on a live contact in the high voltage switch cabinet;

The gas sensor detects gas components including one or more of sulfur hexafluoride, hydrogen sulfide, and ozone.

Preferably, a plurality of temperature sensors are arranged in the high-voltage switch cabinet, and the microprocessor obtains the temperature information collected by each temperature sensor through the RS-485 interface and the RS-485 bus.

Preferably, it also includes: an arc sensor, an arc protection device;

The arc light sensor and the arc light protection device are respectively electrically connected to the microprocessor, and the arc light sensor is used to sense the intensity of the arc light generated in the high-voltage switch cabinet and transmit it to the microprocessor;

The microprocessor is used for receiving the intensity data of the arc light, and judging whether the intensity data of the arc light exceeds a threshold value, and activates the arc light protection device when the value exceeds the threshold value.

Preferably, the ventilation mechanism includes: fan groups respectively arranged on the back, top and side of the high-voltage switchgear;

The fan group is provided with a plurality of fans arranged in matrix.

Preferably, it also includes: a time module;

The time module is electrically connected with the microprocessor, and is used for recording the time when the temperature sensor collects temperature and the time when the gas sensor collects gas.

As can be seen from the above technical solutions, the present invention has the following advantages:

The maintenance and control device of the high-voltage switchgear can accurately control the temperature of the high-voltage switchgear, so that the temperature of the high-voltage switchgear can be maintained within a certain range, thereby effectively prolonging the life of the high-voltage switchgear. Moreover, if there is abnormal gas inside the high-voltage switchgear, its air pressure will inevitably change. The state of the high-voltage switchgear is judged according to the detection results of the gas sensor, and whether there is abnormality in the high-voltage switchgear is judged according to the detection results of the air pressure monitoring unit. , Adjusting the ventilation volume of the high-voltage switchgear can further prolong the service life of the high-voltage switchgear.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings that need to be used in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. As far as people are concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

Figure 1 is an overall schematic diagram of a maintenance and control device for a high-voltage switchgear;

Fig. 2 is a schematic diagram of an embodiment of a maintenance and control device for a high-voltage switchgear.

detailed description

In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in this specific embodiment. Obviously, the implementation described below Examples are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in this patent, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this patent.

The present invention provides a maintenance and control device for a high-voltage switchgear, as shown in Figure 1, comprising: a temperature sensor 1, a microprocessor 4, a ventilation mechanism 5, an air pressure monitoring mechanism 3 and a gas sensor 2;

The temperature sensor 1 is used to collect the temperature of the bus bar in the high-voltage switch cabinet and the electrical components in the high-voltage switch cabinet, and output the collected temperature to the microprocessor 4;

The gas sensor 2 is arranged outside the high-voltage switchgear, and is used to detect the composition and content of the gas discharged from the high-voltage switchgear by the ventilation mechanism 5;

The air pressure monitoring unit 3 is arranged inside the high-voltage switchgear, and is used to detect the air pressure inside the high-voltage switchgear in real time, and transmit the detection result to the microprocessor 4 in real time;

The microprocessor 4 is used to determine the state of the high-voltage switchgear according to the detection result of the gas sensor 2, and judge whether the high-voltage switchgear is abnormal according to the detection result of the air pressure monitoring unit 3. When the high-voltage switchgear is abnormal, the ventilation mechanism 5 is controlled The exhaust air volume decompresses the interior of the high-voltage switchgear; the microprocessor 4 is also used to receive the temperature collected by the temperature sensor 1, and when the temperature value exceeds the preset temperature upper limit, the ventilation mechanism 5 is controlled to control the high-voltage switchgear. Ventilate inside.

The ventilation mechanism 5 includes: fan groups respectively arranged on the back, top and side of the high-voltage switchgear; the fan group is provided with a plurality of fans arranged in a matrix.

In this embodiment, as shown in FIG. 2 , it also includes: a humidity detection module 6 ;

Also includes: a heating mechanism 7; when the humidity value in the high-voltage switch cabinet received by the microprocessor 4 exceeds the preset humidity upper limit, the microprocessor 4 controls the heating mechanism 7 to heat the high-voltage switch cabinet, so that the high-voltage switch cabinet The humidity is maintained within a stable operating range.

In this embodiment, it also includes: a cabinet door sensing module 8; the cabinet door sensing module 8 is used to sense the opening or closing of the high-voltage switch cabinet door, and when the cabinet door sensing module 8 senses that the high-voltage switch cabinet is opened, a prompt message is sent. The cabinet door sensing module uses a magnetic switch to sense the switch state of the cabinet door.

In this way, the reminder function after the high-voltage switchgear is opened can be avoided, and electric shock accidents caused by operator negligence can be avoided.

In this embodiment, the temperature sensor 1 is arranged on the live contact in the high voltage switch cabinet. A plurality of temperature sensors 1 are arranged in the high-voltage switchgear, and the microprocessor 4 obtains the temperature information collected by each temperature sensor 1 through the RS-485 interface and the RS-485 bus.

The gas sensor detects gas components including one or more of sulfur hexafluoride, hydrogen sulfide, and ozone. Specifically, the detection of ozone content by the ozone sensor can determine whether partial discharge occurs; the detection of sulfur hexafluoride content by the sulfur hexafluoride sensor can determine whether sulfur hexafluoride leakage occurs, and the detection of hydrogen sulfide content determines whether there is overheating etc.

In the embodiment, if there is abnormal gas inside the high-voltage switchgear, its air pressure will inevitably change. The state of the high-voltage switchgear is determined according to the detection result of the gas sensor, and whether there is an abnormality in the high-voltage switchgear is judged according to the detection result of the air pressure monitoring unit. When the air pressure is abnormal, adjusting the ventilation volume of the high-voltage switchgear can further prolong the service life of the high-voltage switchgear.

In this embodiment, it also includes: an arc sensor 9, an arc protection device 10;

The arc sensor 9 and the arc protection device 10 are electrically connected to the microprocessor 4 respectively. The arc sensor 9 is used to sense the intensity of the arc generated in the high-voltage switchgear and transmits it to the microprocessor 4; the microprocessor 4 is used to receive the intensity of the arc. data, and judge whether the intensity data of the arc exceeds the threshold, and when the threshold is exceeded, the arc protection device 10 is activated.

In this embodiment, it also includes: a time module; the time module is electrically connected to the microprocessor 4 and is used to record the time when the temperature sensor 1 collects the temperature and the time when the gas sensor 2 collects gas. This allows the operator to know the sampling time and know when the high voltage switchgear exceeds the threshold and when to take action.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. a dimension control device for high-tension switch cabinet, is characterized in that, comprising: temperature sensor, microprocessor, ventilating mechanisms, air pressure monitor mechanism and gas sensor;

Described temperature sensor, for gathering in described high-tension switch cabinet the temperature of electrical equipment in bus bar and high-tension switch cabinet, and exports the temperature of collection to microprocessor;

Described gas sensor is arranged at high-tension switch cabinet outside, the component content for detection of ventilating mechanisms from Exhaust Gas in high-tension switch cabinet;

Described air pressure monitor unit is arranged on the inside of high-tension switch cabinet, for detecting in real time the air pressure of high-tension switch cabinet inside, and testing result is real-time transmitted to described microprocessor;

Described microprocessor is for judging the state of high-tension switch cabinet according to the testing result of gas sensor, and judge according to the testing result of air pressure monitor unit whether high-tension switch cabinet occurs extremely, occur when abnormal at high-tension switch cabinet, by the exhaust air rate that regulates ventilating mechanisms, reduced pressure in high-tension switch cabinet inside; The temperature value that described microprocessor also gathers for receiving temperature sensor, in the time that temperature value exceeds default temperature upper limit, controls described ventilating mechanisms, to ventilating in high-tension switch cabinet.

2. the dimension control device of high-tension switch cabinet according to claim 1, is characterized in that,

Also comprise: humidity detecting module;

Described humidity detecting module is for detection of the humidity in high-tension switch cabinet, and exports the humidity of collection to microprocessor.

3. the dimension control device of high-tension switch cabinet according to claim 2, is characterized in that,

Also comprise: heating arrangements;

In the high-tension switch cabinet that microprocessor receives, humidity value is while exceeding default top limit of humidity value, and heating arrangements is to heating in high-tension switch cabinet described in microprocessor control.

4. the dimension control device of high-tension switch cabinet according to claim 1, is characterized in that,

Also comprise: cabinet door induction module;

Described cabinet door induction module, for responding to the unlatching of high-voltage switch cabinet door or closing, in the time that described cabinet door induction module induction high-tension switch cabinet is opened, sends information.

5. the dimension control device of high-tension switch cabinet according to claim 4, is characterized in that,

Described cabinet door induction module adopts the on off state of magnetic switch induction cabinet door.

6. the dimension control device of high-tension switch cabinet according to claim 1, is characterized in that,

Described temperature sensor is arranged on the live contact in high-tension switch cabinet;

Gas sensor detect gas componant comprise: in sulfur hexafluoride, hydrogen sulfide, ozone one or more.

7. the dimension control device of high-tension switch cabinet according to claim 6, is characterized in that,

In high-tension switch cabinet, be provided with multiple temperature sensors, microprocessor obtains by RS-485 interface and RS-485 bus the temperature information that each temperature sensor gathers.

8. the dimension control device of high-tension switch cabinet according to claim 1, is characterized in that,

Also comprise: arc photosensor, arc light protecting device;

Described arc photosensor and arc light protecting device are electrically connected with microprocessor respectively, and described arc photosensor is used for responding to generation arc light intensity in high-tension switch cabinet, and is transferred to microprocessor;

Described microprocessor is used for receiving the intensity data of arc light, and judges whether the intensity data of arc light exceeds threshold value, starts arc light protecting device when exceeding threshold value.

9. the dimension control device of high-tension switch cabinet according to claim 1, is characterized in that,

Described ventilating mechanisms comprises: the fan group that is separately positioned on high-tension switch cabinet back, top, sidepiece;

Fan composing has the multiple fans that are matrix arrangement.

10. the dimension control device of high-tension switch cabinet according to claim 1, is characterized in that,

Also comprise: time module;

Described time module is electrically connected with microprocessor, for recording the time of temperature sensor collecting temperature and the time of gas sensor collection gas.