CN201417300Y - State monitoring system for circuit breaker - Google Patents
State monitoring system for circuit breaker Download PDFInfo
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- CN201417300Y CN201417300Y CN 200920108304 CN200920108304U CN201417300Y CN 201417300 Y CN201417300 Y CN 201417300Y CN 200920108304 CN200920108304 CN 200920108304 CN 200920108304 U CN200920108304 U CN 200920108304U CN 201417300 Y CN201417300 Y CN 201417300Y
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Abstract
The utility model provides a state monitoring system for a circuit breaker. The system comprises a signal acquisition unit for acquiring a parameter signal which reflects the state of the circuit breaker, a signal conversion unit for converting the parameter signal into a digital signal which can be identified by a central processing unit, a contact terminal state acquisition unit for acquiring the state information of a contact terminal of the circuit breaker, the central processing unit comprising a data analysis subunit for figuring out the monitoring value according to the digital signal and the state information, a judgment subunit for judging whether the monitoring value figured out by the data analysis subunit exceeds the range of the prestored set value or not, a control signal generating subunit for generating a corresponding control signal when the monitoring value exceeds the range of the set value, and a warning unit for generating a corresponding warning signal according to the control signal generated by the control signal generating subunit. The utility model can monitor the state of the circuit breaker real-timely, and avoid unnecessary power failure inspection.
Description
Technical field
The utility model relates to the monitoring device of power equipment, particularly a kind of circuit-breaker status monitoring system.
Background technology
In the electrical equipment of electric system, primary cut-out is unique opertaing device, and its reliable in action is directly connected to the safety and stablization of total system, have a power failure all not normal relevant with primary cut-out of all particularly serious accidents that mostly occurs or system sectionalizing.The major failure of primary cut-out has mechanical fault (comprising operating mechanism and control circuit fault), insulation fault, arc extinguishing fault and conductor part heating accident etc., wherein the most frequently takes place with mechanical fault especially.
At present, for safeguards system safety, stable operation are made regular check on isolating switch usually, understand situations such as isolating switch inside contact scaling loss by opening isolating switch.The shortcoming that adopts this monitoring method is to understand the state of isolating switch in real time, under the situation that can't determine isolating switch actual cut-out size of current and electrical wear, isolating switch is blindly disintegrated, not only can cause huge manpower, financial resources waste, and unnecessary power failure can be to bringing a lot of troubles.
The utility model content
In view of this, fundamental purpose of the present utility model is to provide a kind of circuit-breaker status monitoring system, can detect the state of isolating switch in real time, thereby avoids unnecessary power failure inspection.
The circuit-breaker status monitoring system that the utility model provides comprises:
Signal acquiring unit 100 is used to obtain the parameter signal that reflects circuit-breaker status;
Signal conversion unit 101 is used for converting the parameter signal that signal acquiring unit 100 is obtained to CPU (central processing unit) 103 discernible digital signals;
Contact state acquiring unit 102 is used to obtain the status information of contact of breaker;
CPU (central processing unit) 103 comprises that data analysis subelement 1031, judgment sub-unit 1032 and control signal generate subelement 1033, wherein,
Data analysis subelement 1031 is used for calculating monitoring numerical value according to the status information that every digital signal of signal conversion unit 101 conversion and contact state acquiring unit 102 obtain;
Judgment sub-unit 1032 is used for judgment data and analyzes the scope whether monitoring numerical value that subelement 1031 calculates exceeds the setting value that prestores;
Control signal generates subelement 1033 and is used for judging that in judgment sub-unit 1032 monitoring numerical value generates control signal corresponding when surpassing range of set value;
Caution unit 104 is used for producing corresponding alerting signal according to the control signal that control signal generation subelement 1033 generates.
As from the foregoing, the utility model of being made up of said units can detect the state of isolating switch in real time, sends alerting signal according to Monitoring Data, thereby avoids unnecessary power failure inspection.
Wherein, CPU (central processing unit) 103 comprises that also packing data handles subelement 1034, is used for parameters signal and monitoring numerical value according to the processing of packing of certain agreement;
Transmission unit 106 is used for the data transmission of packing processing subelement 1034 packings is gone out.
As from the foregoing, adopt above-mentioned packing data to handle subelement and transmission unit, parameters signal and monitoring numerical value can be transferred to external computing machine, so that the user stores data and further analyzes.
Preferable, also comprise output unit 105, be used for the switching value signal output action of switching on or cutting off the power supply according to the control signal that control signal generation subelement 1033 generates.
As from the foregoing, adopt above-mentioned output unit 105, the user just can connect panalarm by output unit as required, as audible-visual annunciator, hummer etc., and the maintenance job that the prompting user is correlated with.
One of below wherein, described signal acquiring unit 100 comprises at least:
Current signal obtains subelement 1004, is used to obtain the three-phase current signal of breaker protection current transformer;
Vibration signal obtains subelement 1005, is used to obtain killer switch branch, fashionable vibration signal;
Contact signal obtains subelement 1006, is used to obtain the temperature and the current signal of circuit-breaker status contact.
As from the foregoing, adopt above-mentioned each unit can obtain the required parameter signal of reflection circuit-breaker status, can provide parameter for calculating monitoring numerical value.
One of wherein, described isolating switch is a gas insulation breaker, below described signal acquiring unit 100 also comprises at least:
Moisture signal obtains subelement 1001, is used to obtain the moisture signal of gas insulation breaker gas;
Temperature signal obtains subelement 1003, is used to obtain the temperature signal of gas insulation breaker gas;
Pressure signal obtains subelement 1002, is used to obtain the pressure signal of gas insulation breaker gas.
As from the foregoing, adopt above-mentioned each unit can obtain the required parameter signal of reflection gas insulation breaker, can provide too much parameter for calculating monitoring numerical value.
Description of drawings
Fig. 1 is the schematic diagram of circuit-breaker status monitoring system;
Fig. 2 is the current signal modulate circuit figure of signal conversion unit;
Fig. 3 is the circuit diagram of CPU (central processing unit) and feed circuit thereof;
Fig. 4 is the circuit diagram of clock circuit;
Fig. 5 is the circuit diagram of RS232 interface subelement;
Fig. 6 is the circuit diagram of RS485 interface subelement;
Fig. 7 is the overvoltage protection circuit of RS232 interface subelement;
Fig. 8 is the overvoltage protection circuit of RS485 interface subelement;
Fig. 9 is watchdog circuit figure;
Figure 10 is LED control circuit figure.
Embodiment
Be example with monitoring below at SF6 gas insulation breaker (with SF6 gas as the isolating switch that comes arc and insulating medium), the utility model is introduced, Fig. 1 is a schematic diagram of the present utility model, as shown in the figure, the circuit-breaker status monitoring system that provides of the utility model comprises: signal acquiring unit 100, signal conversion unit 101, contact state acquiring unit 102, CPU (central processing unit) 103, caution unit 104, output unit 105, transmission unit 106.Wherein, signal conversion unit 101, contact state acquiring unit 102, caution unit 104, output unit 105 are connected with CPU (central processing unit) 103 respectively with transmission unit 106, and signal acquiring unit 100 is connected with signal conversion unit 101.
Signal acquiring unit 100 is used to obtain the parameters signal of reflection SF6 gas insulation breaker state.Wherein, signal acquiring unit 100 comprises: current signal obtains subelement 1004, vibration signal and obtains subelement 1005, contact signal and obtain that subelement 1006, moisture signal obtain subelement 1001, temperature signal obtains subelement 1003 and pressure signal obtains subelement 1002.Wherein,
Current signal obtains the three-phase current signal that subelement 1004 is used to obtain the protective current mutual inductor (CT) of isolating switch.
Vibration signal when vibration signal obtains subelement 1005 and is used to obtain the killer switch opening and closing.
Contact signal obtains temperature and the current signal that subelement 1006 is used to obtain the killer switch contact.
Moisture signal obtains the moisture signal that subelement 1001 is used for obtaining SF6 gas.
Temperature signal obtains the temperature signal that subelement 1003 is used for obtaining SF6 gas.
Pressure signal obtains the pressure signal that subelement 1002 is used for obtaining SF6 gas.
The parameters conversion of signals that signal conversion unit 101 is used for receiving becomes CPU (central processing unit) 103 discernible digital signals, and carries out Filtering Processing.For example, among Fig. 2 illustration three groups of circuit, adopting as shown in Figure 2 circuit that current signal is obtained the three-phase current analog signal conversion that subelement 1004 obtains is the correspondent voltage digital signal.Can select the corresponding circuit of quantity according to the quantity of subelement in the signal acquiring unit 100 in the practice.As shown in Figure 2, the current signal modulate circuit adopts instrument amplifier AD620, voltage reference chip REF02 and low noise high precision operating amplifier OP07 forming circuit.
Contact state acquiring unit 102 is used to obtain the status information of killer switch contact.Contact state acquiring unit 102 inside comprise D/A converting circuit, and promptly contact state acquiring unit 102 can be exported digital signal.Status information comprises that mainly stroke, the contact of contact disconnect or the time of closure and the opening and closing state of contact.
CPU (central processing unit) 103 comprises that data analysis subelement 1031, judgment sub-unit 1032, control signal generate subelement 1033 and packing data is handled subelement 1034.
Data analysis subelement 1031 is used for calculating monitoring numerical value according to the every digital signal that receives and the status information of contact.For example, size and the length of arc time according to electric current calculates arc energy (I
2T), the number of times of statistics killer switch action disconnects or the stroke of closed time and contact calculates the speed of contact opening and closing according to contact, according to the temperature of contact and the ratio of electric current accounting temperature and electric current.
Judgment sub-unit 1032 is used to judge whether the monitoring numerical value that calculates exceeds the scope of the setting value that prestores.For example, judgment sub-unit 1032 judges whether the number of times of killer switch action surpasses the life-span of regulation.
Control signal generates subelement 1033 and is used for judging that in judgment sub-unit 1032 monitoring numerical value generates control signal corresponding when surpassing range of set value.For example, when judgment sub-unit 1032 judged that the number of times of killer switch action surpasses the life-span of regulation, control signal generated subelement 1033 and generates control signal corresponding.
Packing data is handled subelement 1034 and is used for parameters signal and monitoring numerical value according to certain agreement (as 101 agreements) processing of packing.
Fig. 3 is CPU (central processing unit) 103 circuit diagrams and power supply circuit thereof, and as shown in the figure, CPU (central processing unit) 103 adopts the MC9S12DG128 chips, the clock circuit of MC9S12DG128 chip as shown in Figure 4, clock circuit adopts DS 1302 chips.CPU (central processing unit) 103 also is connected with the watchdog circuit of the CPU (central processing unit) 103 that is used to reset, and as shown in Figure 9, this watchdog circuit adopts the MAX1232 chip.
Caution unit 104 is used for producing corresponding alerting signal according to the control signal that receives.The different monitoring numerical value of the corresponding expression of different LED lamps.For example, when the number of times that receives expression killer switch action when caution unit 104 surpassed the control signal of guideline lives, the LED 14 of the number of times of corresponding expression killer switch action was luminous.Caution unit 104 adopts the LED lamp, and the LED control circuit as shown in figure 10.
Output unit 105 is used for the switching value output action that basis is switched on or cut off the power supply from the control signal of CPU (central processing unit) 103 receptions.Output unit 105 adopts solid-state relay, and the input end of this solid-state relay is according to the closed or disconnection of the control signal control output end that receives, as the switching value output signal.The output terminal of this solid-state relay is in off-state at ordinary times, the closure of control output end after the input end of solid-state relay receives control signal (high level or low level).The user can be as required at the output terminal connection panalarm of solid-state relay, and as audible-visual annunciator, hummer etc., above-mentioned panalarm just can send warning after energized, the maintenance job that the prompting user is correlated with.
Transmission unit 106 is used for giving external computing machine with the data transmission of packing.External computing machine can be stored above-mentioned data and further analyze.Transmission unit 106 mainly comprises RS232 interface subelement and RS485 interface subelement, is respectively applied for low speed data transmission and high speed data transfer.Fig. 5 is the circuit diagram of RS232 interface subelement, and as shown in the figure, this interface adopts the MAX232 chip, and Fig. 6 is the circuit diagram of RS485 interface subelement, and as shown in the figure, this interface adopts the MAX487 chip.Above-mentioned two interface circuits have not only comprised the transient overvoltage holding circuit but also have comprised optically coupled isolation circuit, as shown in Figure 7 and Figure 8.
Principle of work to the circuit-breaker status monitoring system that provides of the present utility model is introduced below.
Signal acquiring unit 100 is obtained the parameters signal of reflection SF6 gas insulation breaker state in real time, comprises temperature and current signal, gas humidity signal, gas temperature signal and the gaseous tension signal of three-phase current signal, vibration signal, contact; Signal conversion unit 101 becomes CPU (central processing unit) 103 discernible digital signals with the parameters conversion of signals that receives, and carries out Filtering Processing; Contact state acquiring unit 102 obtains the status information of contact, comprises that mainly stroke, the contact of contact disconnects or the time of closure and the opening and closing state of contact.
Data analysis subelement 1031 calculates monitoring numerical value according to the every digital signal that receives and the status information of contact, detects numerical value and mainly comprises arc energy (I
2T), number of times, the speed of contact opening and closing and the ratio of temperature and electric current of killer switch action; Judgment sub-unit 1032 judges whether the monitoring numerical value that calculates exceeds the scope of the setting value that prestores, and for example, judges whether the number of times of killer switch action surpasses the life-span of regulation; Control signal generates subelement 1033 and judges that in judgment sub-unit 1032 monitoring numerical value generates control signal corresponding when surpassing range of set value, for example, when judgment sub-unit 1032 judged that the number of times of killer switch action surpasses the life-span of regulation, control signal generated subelement 1033 and generates control signal corresponding; The control signal that caution unit 104 bases receive produces corresponding alerting signal, for example, when the number of times that receives expression killer switch action when caution unit 104 surpassed the control signal of guideline lives, the LED alarm lamp of the number of times of corresponding expression killer switch action received after the control signal luminous; The action that output unit 103 is switched on or cut off the power supply according to control signal.For example, output unit 103 adopts often drives solid-state relay, and the output terminal of this solid-state relay is in off-state at ordinary times, control output end closure after the input end of solid-state relay receives closed control signal (high level or low level).At this moment the panalarm (as audible-visual annunciator, hummer etc.) that is connected with the output terminal of solid-state relay electric, send sound and light alarm.
Packing data handle subelement 1034 with parameters signal and monitoring numerical value according to certain agreement (as 101 agreements) processing of packing; Transmission unit 104 is gone out the data transmission of packing.Data can be carried out local low speed transmissions or carry out local high-speed transfer through RS485 interface subelement 1041 through RS232 interface subelement 1042.Above-mentioned data can be transferred to external computing machine, so that the user stores data and further analyzes.
Many (in the present embodiment maximum 128) circuit-breaker status monitoring systems can connect to form LAN (Local Area Network) by RS485 interface and a computing machine, so just make things convenient for the user that the Monitoring Data that many circuit-breaker status monitoring systems obtain is managed.
The monitoring result that circuit-breaker status monitoring system of the present utility model obtains can reflect the state of isolating switch in time, accurately.The user can carry out in good time maintenance, maintenance to isolating switch according to monitoring result, improves the operational reliability of isolating switch.
Claims (5)
1. a circuit-breaker status monitoring system is characterized in that, comprising:
Signal acquiring unit (100) is used to obtain the parameter signal that reflects circuit-breaker status;
Signal conversion unit (101) is used for converting the parameter signal that signal acquiring unit (100) is obtained to CPU (central processing unit) (103) discernible digital signal;
Contact state acquiring unit (102) is used to obtain the status information of contact of breaker;
CPU (central processing unit) (103) comprises that data analysis subelement (1031), judgment sub-unit (1032) and control signal generate subelement (1033), wherein,
Data analysis subelement (1031) is used for calculating monitoring numerical value according to the status information that the digital signal of signal conversion unit (101) conversion and contact state acquiring unit (102) obtain;
Judgment sub-unit (1032) is used for judgment data and analyzes the scope whether monitoring numerical value that subelement (1031) calculates exceeds the setting value that prestores;
Control signal generates subelement (1033) and is used for judging that in judgment sub-unit (1032) monitoring numerical value generates control signal corresponding when surpassing range of set value;
Caution unit (104) is used for producing corresponding alerting signal according to the control signal that control signal generation subelement (1033) generates.
2. system according to claim 1 is characterized in that, CPU (central processing unit) (103) comprises that also packing data handles subelement (1034), is used for parameter signal and monitoring numerical value according to the processing of packing of certain agreement;
Transmission unit (106) is used for the data transmission of packing processing subelement (1034) packing is gone out.
3. system according to claim 2 is characterized in that, also comprises output unit (105), is used for the switching value signal output action of switching on or cutting off the power supply according to the control signal that control signal generation subelement (1033) generates.
One of 4. system according to claim 1 is characterized in that, below described signal acquiring unit (100) comprises at least:
Current signal obtains subelement (1004), is used to obtain the three-phase current signal of breaker protection current transformer;
Vibration signal obtains subelement (1005), is used to obtain killer switch branch, fashionable vibration signal;
Contact signal obtains subelement (1006), is used to obtain the temperature and the current signal of circuit-breaker status contact.
One of 5. system according to claim 4 is characterized in that, described isolating switch is a gas insulation breaker, below described signal acquiring unit (100) also comprises at least:
Moisture signal obtains subelement (1001), is used to obtain the moisture signal of gas insulation breaker gas;
Temperature signal obtains subelement (1003), is used to obtain the temperature signal of gas insulation breaker gas;
Pressure signal obtains subelement (1002), is used to obtain the pressure signal of gas insulation breaker gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920108304 CN201417300Y (en) | 2009-05-31 | 2009-05-31 | State monitoring system for circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920108304 CN201417300Y (en) | 2009-05-31 | 2009-05-31 | State monitoring system for circuit breaker |
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| CN201417300Y true CN201417300Y (en) | 2010-03-03 |
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| CN 200920108304 Expired - Fee Related CN201417300Y (en) | 2009-05-31 | 2009-05-31 | State monitoring system for circuit breaker |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255382A (en) * | 2010-05-21 | 2011-11-23 | 上海致维电气有限公司 | Intelligent monitor of switch cabinet |
| CN103312032A (en) * | 2012-03-14 | 2013-09-18 | 国家电网公司 | Monitoring system for auxiliary equipment of substation |
| CN103616045A (en) * | 2013-11-20 | 2014-03-05 | 桂林机床电器有限公司 | Electric leakage circuit break monitoring switch |
| CN103776622A (en) * | 2014-01-08 | 2014-05-07 | 江苏省电力公司检修分公司 | High voltage circuit breaker mechanical fault rapid diagnosis system |
| CN104297680A (en) * | 2014-10-29 | 2015-01-21 | 杭州凯达电力建设有限公司 | Switch position detecting method and system |
| CN104502841A (en) * | 2015-01-12 | 2015-04-08 | 国网上海市电力公司 | Circuit breaker condition monitoring system |
| CN104597398A (en) * | 2015-01-31 | 2015-05-06 | 哈尔滨理工大学 | Intelligent pluggable circuit breaker and monitoring and pre-warning system thereof |
| CN104266827B (en) * | 2014-08-01 | 2017-02-01 | 云南电力试验研究院（集团）有限公司电力研究院 | Circuit breaker state evaluation system and method based on mechanical performance parameters |
| CN106872884A (en) * | 2017-01-23 | 2017-06-20 | 杨志强 | The monitoring device and monitoring method of a kind of disconnecting switch |
| CN107688147A (en) * | 2017-08-21 | 2018-02-13 | 叶军 | A kind of intelligent breaker on-line detecting system |
| CN110187211A (en) * | 2019-06-04 | 2019-08-30 | 安徽工程大学 | A kind of electric equipment intelligent test method |
| CN110806537A (en) * | 2019-10-11 | 2020-02-18 | 交控科技股份有限公司 | Method and system for monitoring state of air switch |
| CN111103535A (en) * | 2019-12-25 | 2020-05-05 | 深圳供电局有限公司 | Circuit breaker monitoring device |
| CN111525687A (en) * | 2020-04-22 | 2020-08-11 | 菱亚能源科技（深圳）股份有限公司 | Smart power grids high voltage circuit breaker |
| CN112415371A (en) * | 2020-10-28 | 2021-02-26 | 温州大学 | Intelligent control and online state monitoring device and method for alternating current contactor |
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2009
- 2009-05-31 CN CN 200920108304 patent/CN201417300Y/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255382A (en) * | 2010-05-21 | 2011-11-23 | 上海致维电气有限公司 | Intelligent monitor of switch cabinet |
| CN103312032A (en) * | 2012-03-14 | 2013-09-18 | 国家电网公司 | Monitoring system for auxiliary equipment of substation |
| CN103616045A (en) * | 2013-11-20 | 2014-03-05 | 桂林机床电器有限公司 | Electric leakage circuit break monitoring switch |
| CN103776622B (en) * | 2014-01-08 | 2016-03-02 | 国家电网公司 | A kind of Mechanical Failure of HV Circuit Breaker rapid diagnosis system |
| CN103776622A (en) * | 2014-01-08 | 2014-05-07 | 江苏省电力公司检修分公司 | High voltage circuit breaker mechanical fault rapid diagnosis system |
| CN104266827B (en) * | 2014-08-01 | 2017-02-01 | 云南电力试验研究院（集团）有限公司电力研究院 | Circuit breaker state evaluation system and method based on mechanical performance parameters |
| CN104297680A (en) * | 2014-10-29 | 2015-01-21 | 杭州凯达电力建设有限公司 | Switch position detecting method and system |
| CN104297680B (en) * | 2014-10-29 | 2017-10-13 | 杭州凯达电力建设有限公司 | A kind of switch detection method and system |
| CN104502841A (en) * | 2015-01-12 | 2015-04-08 | 国网上海市电力公司 | Circuit breaker condition monitoring system |
| CN104597398A (en) * | 2015-01-31 | 2015-05-06 | 哈尔滨理工大学 | Intelligent pluggable circuit breaker and monitoring and pre-warning system thereof |
| CN104597398B (en) * | 2015-01-31 | 2018-08-07 | 哈尔滨理工大学 | Intelligent plug-pull type breaker and its monitoring early-warning system |
| CN106872884A (en) * | 2017-01-23 | 2017-06-20 | 杨志强 | The monitoring device and monitoring method of a kind of disconnecting switch |
| CN107688147A (en) * | 2017-08-21 | 2018-02-13 | 叶军 | A kind of intelligent breaker on-line detecting system |
| CN110187211A (en) * | 2019-06-04 | 2019-08-30 | 安徽工程大学 | A kind of electric equipment intelligent test method |
| CN110806537A (en) * | 2019-10-11 | 2020-02-18 | 交控科技股份有限公司 | Method and system for monitoring state of air switch |
| CN111103535A (en) * | 2019-12-25 | 2020-05-05 | 深圳供电局有限公司 | Circuit breaker monitoring device |
| CN111525687A (en) * | 2020-04-22 | 2020-08-11 | 菱亚能源科技（深圳）股份有限公司 | Smart power grids high voltage circuit breaker |
| CN111525687B (en) * | 2020-04-22 | 2021-02-23 | 菱亚能源科技（深圳）股份有限公司 | Smart power grids high voltage circuit breaker |
| CN112415371A (en) * | 2020-10-28 | 2021-02-26 | 温州大学 | Intelligent control and online state monitoring device and method for alternating current contactor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100303 Termination date: 20170531 |