CN102636705B - Device for judging fault of remote leakage protector and blockage or fault of alternating current contactor, and analysis method thereof - Google Patents
Device for judging fault of remote leakage protector and blockage or fault of alternating current contactor, and analysis method thereof Download PDFInfo
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- 238000004458 analytical method Methods 0.000 title claims abstract description 8
- 230000001012 protector Effects 0.000 title abstract description 68
- 230000001681 protective effect Effects 0.000 claims description 39
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- 238000000034 method Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 6
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- 238000000691 measurement method Methods 0.000 abstract 1
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- 238000010835 comparative analysis Methods 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
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Abstract
The invention discloses a device for judging fault of a remote leakage protector and blockage or fault of an alternating current contactor, and an analysis method thereof. The analysis method comprises the following step of: judging whether a field protector device and a contactor successfully switch off and on by a method of reading a low-voltage outgoing line zero sequence current value, a three-phase current value and on/off state data of a protector through a remote monitoring system. Therefore, through adoption of the device and the analysis method thereof, disclosed by the invention, whether an inner control circuit of the protector has the fault or not and whether the contactor has faults of forced blockage and self-contact adhesion or not can be judged by utilizing an indirect electric measurement method, and an effect that remote trial jump and the field protector button trial jump detection are same is also guaranteed, thus a large amount of labor operation time is saved.
Description
Technical field
The present invention relates to a kind of long-range earth leakage protective device fault and A.C. contactor stop up or fault judges device and analytical approach thereof.
Background technology
In the many application of power supply enterprise at present; earth leakage protective device (hereinafter referred to as protector) and A.C. contactor are combined into an earth leakage protection apparatus; when electric leakage occurring on low-voltage supply line or having people to get an electric shock; this earth leakage protective device is when exceeding permission proof leakage current value; actuating signal makes the inner contact breaker points of protector disconnect; cut off electric current to contactor coil, probe of contactor separately, reaches the effect that low-voltage supply line is stopped power supply.If protector internal relay contact fault, pastes feinting deception, this protector control circuit does not reach the effect that makes A.C. contactor separate specifically.If the control circuit of protector own is normal, but the artificial obstruction of A.C. contactor is powered by force or upper contact is connected by force with the next contact.That consequence is exactly to exist during larger leakage current at low-voltage circuit, and this covering device just can not play the effect that prevents from directly contacting shock hazard and indirect contact shock hazard, electrical equipment grounding fault and cause electrical fire and electrical equipment damage accident.
Summary of the invention
Technical matters to be solved by this invention is just to provide a kind of long-range earth leakage protective device fault and A.C. contactor obstruction or failure judgment device and analytical approach thereof; simple in structure, effectively prevent from playing the effect that prevents from directly contacting shock hazard and indirect contact shock hazard, electrical equipment grounding fault and cause electrical fire and electrical equipment damage accident.
For solving the problems of the technologies described above, a kind of long-range earth leakage protective device fault of the present invention and A.C. contactor obstruction or failure judgment device adopt following technical scheme: comprise low-voltage supply line, it is characterized in that: on described low-voltage supply line leading-out terminal, earth leakage protective device is installed, A.C. contactor, current transformer and zero-sequence transformer, A.C. contactor and earth leakage protective device connect to form an earth leakage protection apparatus, current transformer and zero-sequence transformer access the data acquisition interface of earth leakage protective device by data line, earth leakage protective device connects control of intelligent terminal by data line simultaneously, control of intelligent terminal is connected with the WEB of county power supply administration server and supervisory system network, supervisory system is called together and is surveyed current transformer A/B/C three-phase electricity flow valuve by control of intelligent terminal, the leakage current value that zero-sequence transformer is sent out, the on off state data of earth leakage protective device the data that feedback is come analyze to judge whether on-the-spot earth leakage protective device and A.C. contactor divide in the WEB of county power supply administration server, close a floodgate and successfully and by analysis result in supervisory system, show.
As preferably, described control of intelligent terminal and the WEB of county power supply administration server and supervisory system are by the GPRS of network insertion province company server.
The analytical approach of above-mentioned a kind of long-range earth leakage protective device fault and A.C. contactor obstruction or failure judgment device, is characterized in that:
First, supervisory system is sent successively three real time datas to current transformer, zero-sequence transformer and earth leakage protective device and is called survey instruction together, wherein to call together and survey instruction be that long-range trial jump is sent while starting to Article 1 real time data, Article 2 real time data is called together and surveyed instruction is to send after separating brake success, Article 3 real time data is called together and is surveyed instruction for sending after having closed a floodgate, and meanwhile the WEB of county power supply administration server can receive three real time datas and call together the on off state data of current transformer A/B/C three-phase electricity flow valuve that survey instruction feedback comes, zero-sequence transformer leakage current value, earth leakage protective device successively;
Then, the WEB of county power supply administration server is called to three real time datas the on off state data of surveying the instruction feedback current transformer A/B/C three-phase electricity flow valuve of coming, zero-sequence transformer leakage current value, earth leakage protective device together and is carried out automatic comparative analysis and provide A.C. contactor be electrically connected composition earth leakage protection apparatus with described earth leakage protective device whether normally moving conclusion and analysis result being shown in supervisory system.
Preferably, described analytical approach specifically comprises the following steps:
Step 1: enter the long-range trial jump module of supervisory system, and entirely select these public affairs to become lower protector platform district of installing, then press long-range trial jump button;
Step 2: enter identification checkup window, input password, as correct in password, enter next step, otherwise supervisory system provides password mistake automatically, you have no right to use the conclusion of this module;
Step 3: supervisory system will automatically send a real time data and call survey instruction together, calls the on off state data of surveying current transformer A/B/C three-phase electricity flow valuve, zero-sequence transformer leakage current value, earth leakage protective device together;
Step 4: call together and survey data and return to the monitoring-controlling system signal time and automatically send trial jump order by system according to scene;
Step 5: on-the-spot earth leakage protective device is received after instruction, disconnects the inner contact breaker points of earth leakage protective device, cuts off electric current to ac contactor coil, and AC contactor touch head separately;
Step 6: automatically send again real time data by supervisory system and call survey instruction together, call the on off state data of surveying current transformer A/B/C three-phase electricity flow valuve, zero-sequence transformer leakage current value, earth leakage protective device together;
Step 7: call together and survey data and return to the monitoring-controlling system signal time and automatically send reclosing command by system according to scene;
Step 8: on-the-spot earth leakage protective device is received after instruction, the inner contact breaker points of closed earth leakage protective device, turn-on current is to ac contactor coil, AC contactor touch head closure;
Step 9: according to on-the-spot reclosing success return message, supervisory system again sends real time data and calls survey instruction together, calls the on off state data of surveying current transformer A/B/C three-phase electricity flow valuve, zero-sequence transformer leakage current value, earth leakage protective device together;
Step 10: on-the-spot real time data is back to supervisory system;
Step 11: whole trial jump process finishes, supervisory system is called survey data together in real time by what there will be Article 1, Article 2, Article 3, and the automatic comparative analysis of the county WEB of power supply administration server simultaneously provides conclusion and shows in supervisory system.
Preferably, the WEB of county power supply administration server and supervisory system survey according to three times call together in real time the criterion that data automatic comparative analyses provides conclusion following 6:
Criterion 1: if zero sequence leakage current value is greater than zero, A/B/C three-phase electricity flow valuve and is greater than zero in Article 1, Article 3 return data, and protector on off state is " combined floodgate "; Article 2 data zero sequence leakage current value equals zero, A/B/C three-phase electricity flow valuve all equals zero, protector on off state is " leakage tripping ", supervisory system automatic decision is that protector internal control circuit is normal, contactor normal operation, do not find to stop up and contacts of contactor pinning phenomenon conclusion: this covering device normal operation;
Criterion 2: if zero sequence leakage current value is greater than zero, A/B/C three-phase electricity flow valuve and is greater than zero in Article 1, Article 3 return data, and protector on off state is " combined floodgate "; Article 2 data zero sequence leakage current value is greater than zero, A/B/C three-phase electricity flow valuve is greater than zero, protector on off state is " leakage tripping ", supervisory system automatic decision is that protector internal control circuit is normal, contactor operation is undesired, likely artificial stop up or tentaculum contact fault is more bonding or mechanical arm is bonding, conclusion: this covering device protector internal control circuit is intact, contactor fault or obstruction need be rushed towards on-site verification immediately;
Criterion 3: if zero sequence leakage current value is greater than zero, A/B/C three-phase electricity flow valuve and is greater than zero in Article 1, Article 3 return data, and protector on off state is " combined floodgate "; Article 2 data zero sequence leakage current value is greater than zero, A/B/C three-phase electricity flow valuve is greater than zero mutually, protector on off state is " leakage tripping ", supervisory system automatic decision is that protector internal control circuit is normal, contactor fault or contactor phase contact bonding, conclusion: this covering device protector internal control circuit is intact, contactor fault, need rush towards on-site verification immediately; Criterion 4: if zero sequence leakage current value is greater than zero, A/B/C three-phase electricity flow valuve and is greater than zero in Article 1, Article 3 return data, and protector on off state is " combined floodgate "; Article 2 data zero sequence leakage current value is greater than zero, A/B/C three-phase phase current values is greater than zero, protector on off state is " combined floodgate ", supervisory system automatic decision is that protector internal control circuit is undesired, contactor cannot judge, conclusion: this covering device protector internal control circuit fault, need rush towards immediately on-the-spot replacing;
Criterion 5: if zero sequence leakage current equals zero in Article 1, Article 3 return data, A/B/C three-phase current numerical value equals zero, and protector on off state is " combined floodgate "; Article 2 data zero sequence leakage current value equals zero, A/B/C three-phase electricity flow valuve equals zero, protector on off state is " leakage tripping ", supervisory system automatic decision is that protector internal control circuit is normal, A.C. contactor itself or coil burn out or connecting line open failure again, conclusion: this covering device protector internal control circuit is intact, A.C. contactor fault or coil fault need be rushed towards on-site verification immediately;
Criterion 6: if zero sequence leakage current equals zero in Article 1, Article 3 return data, A/B/C three-phase current numerical value is greater than zero, and protector on off state is " combined floodgate "; Article 2 data zero sequence leakage current value equals zero; A/B/C three-phase electricity flow valuve equals zero; protector on off state is " leakage tripping "; supervisory system automatic decision is that protector internal control circuit is normal, contactor normal operation, zero-sequence transformer fault or connecting line undesired; conclusion: this covering device protector internal control circuit is intact; contactor running status is intact, and zero-sequence transformer fault need be rushed towards on-site verification immediately.
The present invention is that the on off state data method that utilizes long distance control system to read low-pressure line-outgoing zero-sequence current value, three-phase electricity flow valuve and protector judges whether scene protection apparatus and contactor divide, close a floodgate successfully.Be that long-range trial jump starts to call together survey real time data, after separating brake success, call again survey real time data together, after having closed a floodgate, again call survey real time data together.Contrasted by the on off state data of actuation time and low-pressure line-outgoing low-pressure line-outgoing zero-sequence current value, three-phase electricity flow valuve and protector.Call together for three times to survey and by supervisory system, send long-range trial jump interval detection time and automatically complete.Solved like this employing indirect method of checking electricity method and judged whether whether fault, contactor have and stop up by force and the bonding fault in contact own protector internal control circuit; also ensured that long-range trial jump detects the same effect with the trial jump of scene protection device button, thereby saved a large amount of manual work time.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the invention will be further described:
Fig. 1 is the structural representation of a kind of long-range earth leakage protective device fault of the present invention and A.C. contactor obstruction or failure judgment device;
Fig. 2 is the logic diagram of the analytical approach of a kind of long-range earth leakage protective device fault of the present invention and A.C. contactor obstruction or fault judgement;
Fig. 3 is the criterion logic diagram of the analytical approach of a kind of long-range earth leakage protective device fault of the present invention and A.C. contactor obstruction or fault judgement.
Embodiment
Below in conjunction with 1 to 3 pair of the specific embodiment of the present invention of accompanying drawing, be described in more detail.
The present invention by earth leakage protective device 100, A.C. contactor 101, current transformer 102, zero-sequence transformer 103, control of intelligent terminal 104, the GPRS of province company server 105, server and supervisory system 106, form.
By to on-the-spot earth leakage protective device 100 on off state data acquisitions, the next 20cm of ac contactor contact place installing current transformer 102 extracts the A/B/C three-phase electricity flow valuve of low-pressure line-outgoing, the next 10cm of current transformer 102 place installing zero-sequence transformer 103, utilize the long-range survey data variation of calling together in real time, by RS485 interface, reach control of intelligent terminal 104, by control of intelligent terminal 104, by GPRS wireless network, uploading the GPRS of province company server 105 again processes, by province company, being forwarded to the WEB of county telephone central office server 106 is again stored in SQLServer 2000 databases, and carry out real time data comparative analysis by application supervisory system, utilize supervisory system to send instruction simultaneously and oppositely pass to control of intelligent terminal 104 through above-mentioned communication path, then Long-distance Control scene protection device and contactor action.
The present invention utilizes three specific installations to complete to use indirect method of checking electricity method to judge earth leakage protective device fault and A.C. contactor latch up phenomenon.
Step 1: enter the long-range trial jump module of supervisory system, and entirely select these public affairs to become lower protector platform district of installing, then press long-range trial jump button.
Step 2: enter identification checkup window, input password, as correct in password, enter next step, otherwise supervisory system provides password mistake automatically, you have no right to use the conclusion of this module.
Step 3: system will automatically send a real time data and call survey instruction together, calls the on off state data of surveying current transformer 102A/B/C three-phase electricity flow valuve, zero-sequence transformer 103 leakage current values, protector 100 together.
Step 4: call together and survey data and return to the monitoring-controlling system signal time and automatically send trial jump order by system according to scene.
Step 5: scene protection device is received after instruction, disconnects the disconnected contact of the inner circuit breaker of protector, cuts off electric current to contactor coil, and probe of contactor separately.
Step 6: automatically send again real time data by supervisory system and call survey instruction together.Call the on off state data of surveying current transformer 102A/B/C three-phase electricity flow valuve, zero-sequence transformer 103 leakage current values, protector 100 together.
Step 7: call together and survey data and return to the monitoring-controlling system signal time and automatically send reclosing command by system according to scene.
Step 8: scene protection device is received after instruction, the inner contact breaker points of closed protector, turn-on current is to contactor coil, probe of contactor closure.
Step 9: according to on-the-spot reclosing success return message, supervisory system again sends real time data and calls survey instruction together.Call together and survey current transformer 102A/B/C three-phase electricity flow valuve, zero-sequence transformer 103 leakage current values, protector 100) on off state data.
Step 10: on-the-spot real time data is back to supervisory system.
Step 11: whole trial jump process finishes; supervisory system will there will be Article 14, Article 27, Article 3 10 to call in real time survey data together; be the leakage current value of zero sequence current mutual inductor 103, the A/B/C three-phase electricity flow valuve of current transformer 102, the on off state data of protector 100, the automatic comparative analysis of supervisory system provides conclusion 12.
The analytical approach that aforesaid a kind of long-range earth leakage protective device fault and A.C. contactor stop up or fault judges, following 6 of the automatic criterion feature of supervisory system:
Criterion 1: if zero sequence leakage current value is greater than zero, A/B/C three-phase electricity flow valuve and is greater than zero in Article 14, Article 3 10 return datas, and protector on off state is " combined floodgate "; Article 27 data zero sequence leakage current values equal zero, A/B/C three-phase electricity flow valuve all equals zero, protector on off state is " leakage tripping ", supervisory system automatic decision is that protector internal control circuit is normal, contactor normal operation, do not find to stop up and contacts of contactor pinning phenomenon conclusion: this covering device normal operation;
Criterion 2: if zero sequence leakage current value is greater than zero, A/B/C three-phase electricity flow valuve and is greater than zero in Article 14, Article 3 10 return datas, and protector on off state is " combined floodgate "; Article 27 data zero sequence leakage current values are greater than zero, A/B/C three-phase electricity flow valuve is greater than zero, protector on off state is " leakage tripping ", supervisory system automatic decision is that protector internal control circuit is normal, contactor operation is undesired, likely artificial stop up or tentaculum contact fault is more bonding or mechanical arm is bonding, conclusion: this covering device protector internal control circuit is intact, contactor fault or obstruction need be rushed towards on-site verification immediately;
Criterion 3: if zero sequence leakage current value is greater than zero, A/B/C three-phase electricity flow valuve and is greater than zero in Article 14, Article 3 10 return datas, and protector on off state is " combined floodgate "; Article 27 data zero sequence leakage current values are greater than zero, A/B/C three-phase electricity flow valuve is greater than zero mutually, protector on off state is " leakage tripping ", supervisory system automatic decision is that protector internal control circuit is normal, contactor fault or contactor phase contact bonding, conclusion: this covering device protector internal control circuit is intact, contactor fault, need rush towards on-site verification immediately;
Criterion 4: if zero sequence leakage current value is greater than zero, A/B/C three-phase electricity flow valuve and is greater than zero in Article 14, Article 3 10 return datas, and protector on off state is " combined floodgate "; Article 27 data zero sequence leakage current values are greater than zero, A/B/C three-phase phase current values is greater than zero, protector on off state is " combined floodgate ", supervisory system automatic decision is that protector internal control circuit is undesired, contactor cannot judge, conclusion: this covering device protector internal control circuit fault, need rush towards immediately on-the-spot replacing;
Criterion 5: if zero sequence leakage current equals zero in Article 14, Article 3 10 return datas, A/B/C three-phase current numerical value equals zero, and protector on off state is " combined floodgate "; Article 27 data zero sequence leakage current values equal zero, A/B/C three-phase electricity flow valuve equals zero, protector on off state is " leakage tripping ", supervisory system automatic decision is that protector internal control circuit is normal, A.C. contactor itself or coil burn out or connecting line open failure again, conclusion: this covering device protector internal control circuit is intact, A.C. contactor fault or coil fault need be rushed towards on-site verification immediately;
Criterion 6: if zero sequence leakage current equals zero in Article 14, Article 3 10 return datas, A/B/C three-phase current numerical value is greater than zero, and protector on off state is " combined floodgate "; Article 2) data zero sequence leakage current value equals zero; A/B/C three-phase electricity flow valuve equals zero; protector on off state is " leakage tripping "; supervisory system automatic decision is that protector internal control circuit is normal, contactor normal operation, zero-sequence transformer fault or connecting line undesired; conclusion: this covering device protector internal control circuit is intact; contactor running status is intact, and zero-sequence transformer fault need be rushed towards on-site verification immediately.
Claims (2)
1. a long-range earth leakage protective device fault and A.C. contactor stop up or failure judgment device, comprise low-voltage supply line, it is characterized in that: earth leakage protective device (100) is installed on described low-voltage supply line leading-out terminal, A.C. contactor (101), current transformer (102) and zero-sequence transformer (103), A.C. contactor (101) connects to form an earth leakage protection apparatus with earth leakage protective device, current transformer and zero-sequence transformer access the data acquisition interface of earth leakage protective device by data line, earth leakage protective device connects control of intelligent terminal (104) by data line simultaneously, control of intelligent terminal is connected with the WEB of county power supply administration server and supervisory system (106) network, supervisory system is called together and is surveyed current transformer A/B/C three-phase electricity flow valuve by control of intelligent terminal, the leakage current value of zero-sequence transformer, the on off state data of earth leakage protective device the data that feedback is come analyze to judge whether on-the-spot earth leakage protective device and A.C. contactor divide in the WEB of county power supply administration server, close a floodgate and successfully and by analysis result in supervisory system, show.
2. the long-range earth leakage protective device fault of one according to claim 1 and A.C. contactor stop up or failure judgment device, it is characterized in that: described control of intelligent terminal and the WEB of county power supply administration server and supervisory system are by the GPRS of network insertion province company server (105).
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| CN201310522519.1A Division CN103675520B (en) | 2012-03-09 | 2012-03-09 | Remote analysis method for determining leakage protector faults and AC contactor obstruction or faults |
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| CN103219703B (en) * | 2013-04-07 | 2015-08-26 | 国家电网公司 | Anti-low voltage inverse power transmission earth leakage protective device |
| CN103852685A (en) * | 2014-03-27 | 2014-06-11 | 林生得 | Low voltage leakage monitoring method of power distribution platform region |
| CN105870879B (en) * | 2016-04-27 | 2018-05-04 | 国网安徽省电力公司六安市叶集供电公司 | A kind of low-voltage leakage switchs intelligent monitoring method |
| CN109633422B (en) * | 2018-12-21 | 2021-08-17 | 长沙理工大学 | Encrypted chip security testing method based on scanning confusion |
| CN116316402B (en) * | 2023-05-22 | 2023-08-08 | 江苏安荷电能科技有限公司 | Leakage protection system |
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