CN108775929B - Vacuum circuit breaker on-line monitoring system - Google Patents
Vacuum circuit breaker on-line monitoring system Download PDFInfo
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- CN108775929B CN108775929B CN201810903764.XA CN201810903764A CN108775929B CN 108775929 B CN108775929 B CN 108775929B CN 201810903764 A CN201810903764 A CN 201810903764A CN 108775929 B CN108775929 B CN 108775929B
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Abstract
The invention discloses an online monitoring system of a vacuum circuit breaker, which comprises a data acquisition module, a processor and a display module, wherein the processor is respectively connected with the data acquisition module and the display module, the data acquisition module comprises a temperature and humidity acquisition unit, a pressure detection unit, an angle detection unit, a tension detection unit, a counting unit, a control unit and a wireless communication unit, and the control unit is respectively connected with the temperature and humidity acquisition unit, the pressure detection unit, the angle detection unit, the tension detection unit, the counting unit and the wireless communication unit. According to the invention, the temperature, the humidity, the pressure, the tension, the stroke and the like in the circuit breaker are collected and analyzed through each unit in the data acquisition module, so that the safety evaluation coefficient of the circuit breaker is convenient to count, the multi-azimuth detection of the circuit breaker is realized, the online monitoring is realized, and the real-time performance, the accuracy and the reliability of the circuit breaker in the online monitoring process are greatly improved.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and relates to an online monitoring system for a vacuum circuit breaker.
Background
The vacuum circuit breaker is a circuit breaker with a contact opening and closing in a high-vacuum bubble, plays a role in control and protection in the operation of a power distribution network of a power system, and has operation, maintenance and overhaul conditions closely related to the whole system. With the increase of voltage level and the increase of installed capacity, the system has higher and higher requirements on the operation reliability of the electric equipment, which puts higher requirements on the detection and diagnosis technology of the electric equipment.
In recent years, the number of defects and accidents of the vacuum circuit breaker is increased, along with the wide application of the vacuum circuit breaker in a power system, particularly a medium-voltage system, the necessity of carrying out online monitoring on the vacuum circuit breaker is more prominent, the existing circuit breaker cannot monitor the parameters of the circuit breaker in real time and effectively judge the safety performance of the circuit breaker, and the problems of poor reliability, poor accuracy and poor real-time performance exist.
Disclosure of Invention
The invention aims to provide an online monitoring system for a vacuum circuit breaker, which solves the problems that the existing circuit breaker cannot monitor the parameters of the circuit breaker, and has poor safety, accuracy and instantaneity.
The purpose of the invention can be realized by the following technical scheme:
an online monitoring system of a vacuum circuit breaker comprises a data acquisition module, a processor and a display module, wherein the processor is respectively connected with the data acquisition module and the display module;
the data acquisition module comprises a temperature and humidity acquisition unit, a pressure detection unit, an angle detection unit, a tension detection unit, a counting unit, a control unit and a wireless communication unit, wherein the control unit is respectively connected with the temperature and humidity acquisition unit, the pressure detection unit, the angle detection unit, the tension detection unit, the counting unit and the wireless communication unit;
the temperature and humidity acquisition unit is used for acquiring the temperature and humidity of a fixed contact of the circuit breaker and transmitting the detected temperature and humidity to the control unit;
the pressure detection unit comprises a pressure sensor and an analog-to-digital converter, the pressure sensor is arranged in an insulator of the circuit breaker and used for detecting the pressure exerted on the insulator by the spring when the circuit breaker is switched on/off, the detected pressure is converted into digital quantity pressure information through the analog-to-digital converter, and the converted pressure information is sent to the control unit;
the angle detection unit is an angle sensor, is arranged on the contact of the circuit breaker, and is used for detecting the stroke angle of the contact of the circuit breaker in real time and sending the detected stroke angle of the contact to the control unit;
the tension detection unit is a tension sensor, is arranged on the breaker spring and is used for detecting tension information on the breaker spring in real time and sending the detected tension information to the control unit;
the counting unit is a counter and is used for counting the stretching times of the spring and sending the stretching times to the control unit;
the control unit is a microprocessor and is used for receiving the temperature and humidity information sent by the temperature and humidity acquisition unit and comparing the received temperature and humidity with a preset temperature threshold value and a preset humidity threshold value one by one to obtain a temperature difference and a humidity difference; receiving pressure information of a breaker insulator sent by a pressure detection unit, and comparing the received pressure information with a set insulator bearing pressure threshold value to obtain a pressure difference; the angle of the contact stroke that the angle detecting element sent is received, the angle of receiving compares one by one with a plurality of angle numerical values of settlement, obtains the stroke that this angle corresponds, and the control unit receives the pulling force information that pulling force detecting element sent to compare the pulling force information of receiving and the spring pulling force threshold value of settlement, obtain the pulling force difference, wherein, spring pulling force threshold value is 0.8 the biggest pulling force of spring.
The control unit counts a safety evaluation coefficient W of the circuit breaker according to the temperature difference, the humidity difference, the pressure difference, the tension difference and the spring stretching times, and sends the received temperature, humidity, pressure, contact travel, pressure, spring stretching times and the counted safety evaluation coefficient of the circuit breaker to the processor through the wireless communication unit;
the processor receives the temperature and humidity, the pressure, the contact stroke, the pressure and the spring stretching times of the circuit breaker and the counted circuit breaker safety evaluation coefficient which are sent by the wireless communication unit, and sends the temperature and humidity, the pressure, the contact stroke, the pressure and the spring stretching times of the circuit breaker and the counted circuit breaker safety evaluation coefficient to the display terminal, meanwhile, the processor compares the received circuit breaker safety evaluation coefficient with the set circuit breaker safety evaluation coefficient, and once the circuit breaker safety evaluation coefficient exceeds the set circuit breaker safety evaluation coefficient, the processor sends reminding information to the display terminal;
and the display terminal is used for receiving the real-time humiture, pressure, contact travel, pressure and spring stretching times of the circuit breaker sent by the processor and the counted safety evaluation coefficient of the circuit breaker, and displaying and reminding the safety evaluation coefficient.
Further, the safety evaluation coefficient of the circuit breaker is calculated by the formula
Δ w is expressed as a difference between the detected temperature and a preset temperature threshold, and Δ s is expressed as a difference between the detected humidity and a preset humidity thresholdAnd the difference between the detected pressure and the threshold value of the pressure borne by the insulator is represented by deltay, the difference between the detected spring pressure and the set threshold value of the spring tension is represented by deltal, and the number of times of spring stretching is represented by n.
Furthermore, the temperature and humidity acquisition unit comprises a temperature and humidity sensor and an analog-to-digital converter, wherein the temperature and humidity sensor is installed at a fixed contact of the circuit breaker and used for detecting the temperature and humidity of the fixed contact of the circuit breaker in real time and converting the detected temperature and humidity into digital temperature and humidity information through the analog-to-digital converter.
The invention has the beneficial effects that:
according to the vacuum circuit breaker online monitoring system, the temperature, the humidity, the pressure, the tension, the stroke and the like in the circuit breaker are collected and analyzed through each unit in the data acquisition module, so that the safety evaluation coefficient of the circuit breaker can be counted conveniently, the multi-directional detection of the circuit breaker is realized, the online monitoring is realized, and the real-time performance, the accuracy and the reliability of the circuit breaker in the online monitoring process are greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of an online monitoring system for a vacuum circuit breaker according to 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, an online monitoring system for a vacuum circuit breaker includes a data acquisition module, a processor and a display module, wherein the processor is connected to the data acquisition module and the display module respectively;
the data acquisition module comprises a temperature and humidity acquisition unit, a pressure detection unit, an angle detection unit, a tension detection unit, a counting unit, a control unit and a wireless communication unit, wherein the control unit is respectively connected with the temperature and humidity acquisition unit, the pressure detection unit, the angle detection unit, the tension detection unit, the counting unit and the wireless communication unit;
the temperature and humidity acquisition unit comprises a temperature and humidity sensor and an analog-to-digital converter, the temperature and humidity sensor is arranged at a fixed contact of the circuit breaker and used for detecting the temperature and humidity of the fixed contact of the circuit breaker in real time, the analog-to-digital converter is used for converting the detected temperature and humidity into digital temperature and humidity information, and the converted temperature and humidity information is sent to the control unit;
the pressure detection unit comprises a pressure sensor and an analog-to-digital converter, the pressure sensor is arranged in an insulator of the circuit breaker and used for detecting the pressure exerted on the insulator by the spring when the circuit breaker is switched on/off, the detected pressure is converted into digital quantity pressure information through the analog-to-digital converter, and the converted pressure information is sent to the control unit;
the angle detection unit is an angle sensor, is arranged on the contact of the circuit breaker, and is used for detecting the stroke angle of the contact of the circuit breaker in real time and sending the detected stroke angle of the contact to the control unit;
the tension detection unit is a tension sensor, is arranged on the breaker spring and is used for detecting tension information on the breaker spring in real time and sending the detected tension information to the control unit;
the counting unit is a counter and is used for counting the stretching times of the spring and sending the stretching times to the control unit;
the control unit is a microprocessor and is used for receiving the temperature and humidity information sent by the temperature and humidity acquisition unit and comparing the received temperature and humidity with a preset temperature threshold value and a preset humidity threshold value one by one to obtain a temperature difference and a humidity difference; receiving pressure information of a breaker insulator sent by a pressure detection unit, and comparing the received pressure information with a set insulator bearing pressure threshold value to obtain a pressure difference; the angle of the contact stroke that the angle detecting element sent is received, the angle of receiving compares one by one with a plurality of angle numerical values of settlement, obtains the stroke that this angle corresponds, and the control unit receives the pulling force information that pulling force detecting element sent to compare the pulling force information of receiving and the spring pulling force threshold value of settlement, obtain the pulling force difference, wherein, spring pulling force threshold value is 0.8 the biggest pulling force of spring.
The control unit counts the safety evaluation coefficient of the circuit breaker according to the temperature difference, the humidity difference, the pressure difference, the tension difference and the spring stretching times
Δ w is a difference between the detected temperature and a preset temperature threshold value, Δ s is a difference between the detected humidity and a preset humidity threshold value, Δ y is a difference between the detected pressure and an insulator bearing pressure threshold value, Δ l is a difference between the detected spring pressure and a set spring tension threshold value, and n is a number of spring tensions.
Meanwhile, the control unit sends the received temperature, humidity, pressure, contact travel, pressure, spring stretching times and the counted safety evaluation coefficient of the circuit breaker to the processor through the wireless communication unit;
the processor receives the humiture, the pressure, the contact stroke, the pressure and the spring tension frequency of the circuit breaker sent by the wireless communication unit and the counted circuit breaker safety evaluation coefficient, and sends the humiture, the pressure, the contact stroke, the pressure and the spring tension frequency of the circuit breaker and the counted circuit breaker safety evaluation coefficient to the display terminal, meanwhile, the processor compares the received circuit breaker safety evaluation coefficient with the set circuit breaker safety evaluation coefficient, and once the circuit breaker safety evaluation coefficient exceeds the set circuit breaker safety evaluation coefficient, the processor sends reminding information to the display terminal.
And the display terminal is used for receiving and displaying the real-time humiture, pressure, contact travel, pressure and spring stretching times of the circuit breaker and the counted safety evaluation coefficient of the circuit breaker sent by the processor.
According to the vacuum circuit breaker online monitoring system, the temperature, the humidity, the pressure, the tension, the stroke and the like in the circuit breaker are collected and analyzed through each unit in the data acquisition module, so that the safety evaluation coefficient of the circuit breaker can be counted conveniently, the multi-directional detection of the circuit breaker is realized, the online monitoring is realized, and the real-time performance, the accuracy and the reliability of the circuit breaker in the online monitoring process are greatly improved.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (1)
1. The utility model provides a vacuum circuit breaker on-line monitoring system which characterized in that: the system comprises a data acquisition module, a processor, a communication transmission module and a display module, wherein the processor is respectively connected with the data acquisition module and the communication transmission module;
the communication transmission module and the display module are connected with the data acquisition module, and the data acquisition module comprises a temperature and humidity acquisition unit, a pressure detection unit, an angle detection unit, a tension detection unit, a counting unit, a control unit and a wireless communication unit, wherein the control unit is respectively connected with the temperature and humidity acquisition unit, the pressure detection unit, the angle detection unit, the tension detection unit, the counting unit and the wireless communication unit;
the temperature and humidity acquisition unit is used for acquiring the temperature and humidity of a fixed contact of the circuit breaker and transmitting the detected temperature and humidity to the control unit;
the pressure detection unit comprises a pressure sensor and an analog-to-digital converter, the pressure sensor is arranged in an insulator of the circuit breaker and used for detecting the pressure exerted on the insulator by the spring when the circuit breaker is switched on/off, the detected pressure is converted into digital quantity pressure information through the analog-to-digital converter, and the converted pressure information is sent to the control unit;
the angle detection unit is an angle sensor, is arranged on the contact of the circuit breaker, and is used for detecting the stroke angle of the contact of the circuit breaker in real time and sending the detected stroke angle of the contact to the control unit;
the tension detection unit is a tension sensor, is arranged on the breaker spring and is used for detecting tension information on the breaker spring in real time and sending the detected tension information to the control unit;
the counting unit is a counter and is used for counting the stretching times of the spring and sending the stretching times to the control unit;
the control unit is a microprocessor and is used for receiving the temperature and humidity information sent by the temperature and humidity acquisition unit and comparing the received temperature and humidity with a preset temperature threshold value and a preset humidity threshold value one by one to obtain a temperature difference and a humidity difference; receiving pressure information of a breaker insulator sent by a pressure detection unit, and comparing the received pressure information with a set insulator bearing pressure threshold value to obtain a pressure difference; receiving the angle of the contact stroke sent by the angle detection unit, comparing the received angle with a plurality of set angle values one by one to obtain a stroke corresponding to the angle, receiving the tension information sent by the tension detection unit by the control unit, and comparing the received tension information with a set spring tension threshold value to obtain a tension difference value, wherein the spring tension threshold value is 0.8 × the maximum tension of the spring;
the control unit counts a safety evaluation coefficient W of the circuit breaker according to the temperature difference, the humidity difference, the pressure difference, the tension difference and the spring stretching times, and sends the received temperature, humidity, pressure, contact travel, pressure, spring stretching times and the counted safety evaluation coefficient of the circuit breaker to the processor through the wireless communication unit;
the processor receives the temperature and humidity, the pressure, the contact stroke, the pressure and the spring stretching times of the circuit breaker and the counted circuit breaker safety evaluation coefficient which are sent by the wireless communication unit, and sends the temperature and humidity, the pressure, the contact stroke, the pressure and the spring stretching times of the circuit breaker and the counted circuit breaker safety evaluation coefficient to the display terminal, meanwhile, the processor compares the received circuit breaker safety evaluation coefficient with the set circuit breaker safety evaluation coefficient, and once the circuit breaker safety evaluation coefficient exceeds the set circuit breaker safety evaluation coefficient, the processor sends reminding information to the display terminal;
the display terminal is used for receiving the real-time humiture, pressure, contact travel, pressure and spring stretching times of the circuit breaker and the counted safety evaluation coefficient of the circuit breaker sent by the processor, and displaying and reminding the real-time humiture, pressure, contact travel, pressure and spring stretching times of the circuit breaker;
the safety evaluation coefficient of the circuit breaker is calculated by the formula
Δ w represents the difference between the detected temperature and a preset temperature threshold value, Δ s represents the difference between the detected humidity and a preset humidity threshold value, Δ y represents the difference between the detected pressure and an insulator bearing pressure threshold value, Δ l represents the difference between the detected spring pressure and a set spring tension threshold value, and n represents the number of spring stretches;
the temperature and humidity acquisition unit comprises a temperature and humidity sensor and an analog-to-digital converter, the temperature and humidity sensor is installed at a fixed contact of the circuit breaker and used for detecting the temperature and the humidity of the fixed contact of the circuit breaker in real time, and the temperature and the humidity which are detected are converted into digital quantity temperature and humidity information through the analog-to-digital converter.
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| CN201810903764.XA CN108775929B (en) | 2018-08-09 | 2018-08-09 | Vacuum circuit breaker on-line monitoring system |
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| CN109613380B (en) * | 2019-02-19 | 2020-11-06 | 广东电网有限责任公司 | State evaluation method, device and system for pole-mounted switch complete equipment and server |
| CN110103133A (en) * | 2019-06-25 | 2019-08-09 | 吉姆西半导体科技（无锡）有限公司 | The micro- missing inspection examining system of grinding head |
| CN116317138B (en) * | 2023-03-15 | 2024-03-26 | 国家电投集团云南国际电力投资有限公司 | Circuit breaker control system |
| CN117393375B (en) * | 2023-12-08 | 2024-02-02 | 陕西四方华能电气设备有限公司 | High-voltage vacuum circuit breaker |
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