CN101718813B - Method for monitoring voltage acquisition circuit of electric power secondary system - Google Patents
Method for monitoring voltage acquisition circuit of electric power secondary system Download PDFInfo
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- CN101718813B CN101718813B CN2009103097807A CN200910309780A CN101718813B CN 101718813 B CN101718813 B CN 101718813B CN 2009103097807 A CN2009103097807 A CN 2009103097807A CN 200910309780 A CN200910309780 A CN 200910309780A CN 101718813 B CN101718813 B CN 101718813B
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- protective relaying
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Abstract
The invention relates to a method for monitoring a voltage acquisition circuit of an electric power secondary system. The method comprises the following steps of: collecting the electrical quantity acquired by each relay protection device on one bus and the abnormal TV-circuit detecting result of each relay protection device by using a monitoring center, judging whether the voltage acquisition circuit corresponding to each relay protection device is abnormal after comprehensive comparison, and accurately positioning the abnormity at the voltage circuit of the corresponding phase of the corresponding relay protection device, thereby accurately reflecting the state of the voltage acquisition circuit, realizing the state monitoring of the voltage circuit, greatly reducing the workload for overhauling and trouble shooting, shortening the outage time for equipment overhauling and improving the work efficiency.
Description
Technical field
The present invention relates to the electric power secondary system Condition Monitoring Technology, be specifically related to a kind of method for monitoring voltage acquisition circuit of electric power secondary system.
Background technology
System of relay protection is made of each link such as closing loop of ac circuit, DC loop, protective relaying device itself, isolating switch.In the stage that preventative maintenance is still adopted in the maintenance of relay protection now, run duration adopts the prophylactic repair pattern.Prophylactic repair has played really in guaranteeing the equipment operate as normal and has directly prevented or the effect of delay fault, but it is this not according to the actual state of equipment, the simple maintenance at interval in required time, unavoidably can produce superfluous maintenance, not only cause the waste of the loss of equipment operational use time and human and material resources, financial resources, even can cause maintenance failure.Optimal pattern is a repair based on condition of component, based on the condition responsive of equipment, by continuity observation and comprehensive other factors to equipment, the existing occurent or potential performance degradation phenomenon of identification equipment, equipment state is made reasonable assessment, determine the best maintenance of equipment opportunity.Repair based on condition of component must be based upon on the basis that equipment state is effectively monitored.
The AC sampling loop of protective relaying device is extremely important, directly affects the action behavior of protection, realize repair based on condition of component, must carry out effective on-line monitoring to voltage acquisition circuit.Development along with software and hardware technology; platform technology is progressively used in the manufacturing and designing of relay protection; make the application category of protecting suitably to be extended in the device loop in addition and go that this provides possibility for on-line monitoring of expanding the protection system associated loop.
Supervision for voltage circuit mainly realizes in protective relaying device at present, does not have zero sequence and negative-sequence current by detecting when the protective relaying device sampling has residual voltage, differentiates single-phase or two phase voltages are lost; The variable quantity of losing the front and back electric current by the detection three-phase voltage approaches the zero three-phase pressure loss under the normal load situation of differentiating; Three-phase voltage is lost when comprehensively judging line charging by current sensor detection charging front and back electric current variation and three-phase voltage value.This mode has just realized the unusual back alarm function of secondary circuit, and unusual location is accurate inadequately, investigates the acquisition circuit that exchanges that need check voltage secondary circuit and protective relaying device in the interval when unusual, and workload is big.
Summary of the invention
The purpose of this invention is to provide a kind of method for monitoring voltage acquisition circuit of electric power secondary system, whether exist unusually, and it is unusual accurately to locate the secondary circuit of corresponding phase voltage to judge voltage acquisition circuit.
For achieving the above object, the technical scheme of employing is: a kind of method for monitoring voltage acquisition circuit of electric power secondary system may further comprise the steps:
Article (1) one, more than one protective relaying device is sampled to the electrical equipment amounts such as three-phase current of system's three-phase voltage and corresponding protective relaying device on the bus;
(2) whether each protective relaying device is unusual according to the institute electric parameters of gathering detection TV loop respectively; Whether each protective relaying device detects the TV loop according to institute's electric parameters of gathering respectively unusual, circulates to Surveillance center's transmission sampled data, execution in step (3) according to fixed frequency when each protective relaying device all has TV loop abnormal signal; When arbitrary protective relaying device detects TV loop abnormal signal, send corresponding TV loop abnormal alarm signal, execution in step (5) to Surveillance center immediately;
(3) calculate the mean value of the corresponding phase voltage of each protective relaying device;
(4) Surveillance center calculates the absolute value of each phase voltage with the difference of corresponding phase voltage mean value of each protective relaying device respectively, if the absolute value of the difference of being calculated promptly sends relevant voltage acquisition circuit abnormal alarm signal greater than setting preset value;
(5) according to TV loop abnormal alarm signal and voltage acquisition circuit abnormal alarm signal, unusual circuit is positioned.
The method of the unusual circuit in location described in the step (5) is: if exist TV loop abnormality alarming signal, Surveillance center directly to point out corresponding TV loop unusual; Otherwise further judge the absolute value of each phase voltage with the difference of corresponding phase voltage mean value of each protective relaying device, unusual if the absolute value of the difference of being calculated, can be decided to be the corresponding phase voltage acquisition circuit of corresponding protective relaying device greater than setting preset value.
The computing method of the mean value of the corresponding phase voltage of each protective relaying device described in the step (3) are: the corresponding phase voltage value sum of each protective relaying device sampling is divided by the total number of protective relaying device.
The protective relaying device end detects the TV loop in real time according to the collection electric parameters, and whether unusual detection method is: do not have zero sequence and negative-sequence current by detecting when the protective relaying device sampling has residual voltage, differentiate single-phase or two phase voltages are lost; The variable quantity of losing the front and back electric current by the detection three-phase voltage approaches the zero three-phase pressure loss under the normal load situation of differentiating; Three-phase voltage is lost when comprehensively judging line charging by current sensor detection charging front and back electric current variation and three-phase voltage value.
The sampling electric parameters of each protective relaying device and TV loop abnormality alarming signal are sent to Surveillance center in the mode of remote measurement value.
The present invention adopts Surveillance center to collect and adopts the electric parameters of each protective relaying device collection on bus of Surveillance center's collection and the TV loop abnormality detection result of each protective relaying device; comprehensive relatively back judges whether the voltage acquisition circuit of the correspondence of each protective relaying device exists unusually; and will accurately unusually be positioned to the corresponding phase voltage of corresponding protective relaying device loop; realized the accurate location that voltage acquisition circuit is unusual; significantly reduced the workload that maintenance is fixed a breakdown; the maintenance power off time of reduction equipment has improved work efficiency.
Description of drawings
Fig. 1 is a method for monitoring voltage acquisition circuit of electric power secondary system process flow diagram of the present invention.
Embodiment
The voltage acquisition circuit monitoring system that adopts in the present embodiment is made up of many protective relaying devices, the Surveillance center of a plurality of electrical separations on the bus.Each protective relaying device is gathered bus voltage value, and the voltage acquisition value is reached Surveillance center, judges comprehensively in Surveillance center whether voltage acquisition circuit exists unusually, if having unusually, locatees the voltage circuit of a certain phase at a certain interval.
Protective relaying device itself has TV loop abnormal detection function, and testing result is sent to Surveillance center, the Rule of judgment during as unusual location.
As shown in Figure 1, method for monitoring voltage acquisition circuit of electric power secondary system may further comprise the steps in the present embodiment:
Article (1) one, more than one protective relaying device is sampled to the electrical equipment amounts such as three-phase current of system's three-phase voltage and corresponding protective relaying device on the bus;
(2) whether each protective relaying device to detect the TV loop according to institute's electric parameters of gathering respectively unusual, and method is: sampling by the detection protective relaying device does not have zero sequence and negative-sequence current when residual voltage is arranged, and differentiates single-phase or two phase voltages are lost; The variable quantity of losing the front and back electric current by the detection three-phase voltage approaches the zero three-phase pressure loss under the normal load situation of differentiating; Three-phase voltage is lost when comprehensively judging line charging by current sensor detection charging front and back electric current variation and three-phase voltage value; When all having TV loop abnormal signal, each protective relaying device do not send sampled data, execution in step (3) to Surveillance center according to the fixed frequency circulation; When arbitrary protective relaying device detects TV loop abnormal signal, send corresponding TV loop abnormal alarm signal, execution in step (5) to Surveillance center immediately;
(3) calculate the mean value of the corresponding phase voltage of each protective relaying device, computing method are: the corresponding phase voltage value sum of each protective relaying device sampling is divided by the total number of protective relaying device.；
(4) Surveillance center calculates the absolute value of each phase voltage with the difference of corresponding phase voltage mean value of each protective relaying device respectively, if the absolute value of the difference of being calculated promptly sends relevant voltage acquisition circuit abnormal alarm signal greater than setting preset value;
(5) according to TV loop abnormal alarm signal and voltage acquisition circuit abnormal alarm signal, unusual circuit is positioned, method is: if exist TV loop abnormality alarming signal, Surveillance center directly to point out corresponding TV loop unusual; Otherwise further judge the absolute value of each phase voltage with the difference of corresponding phase voltage mean value of each protective relaying device; if the absolute value of the difference of being calculated is greater than setting preset value; it is unusual to be decided to be the corresponding phase voltage acquisition circuit of corresponding protective relaying device, and prompting operation maintenance personnel overhaul the voltage acquisition circuit of corresponding protective relaying device.
The sampling electric parameters of each protective relaying device and TV loop abnormality alarming signal are sent to Surveillance center in the mode of remote measurement value.
For the unattended operation transformer station of remote districts, Surveillance center can be in the distance, and each electric parameters that protective relaying device collects and TV loop abnormality detection result adopt the telemechanical stipulations to deliver to the relay protection Surveillance center in a distant place, realize remote condition monitoring.
Claims (3)
1. a method for monitoring voltage acquisition circuit of electric power secondary system is characterized in that, this method step is as follows:
Article (1) one, more than one protective relaying device is sampled to the three-phase current of system's three-phase voltage and corresponding protective relaying device on the bus;
(2) whether each protective relaying device to detect the TV loop according to institute's electric parameters of gathering respectively unusual, and method is: sampling by the detection protective relaying device does not have zero sequence and negative-sequence current when residual voltage is arranged, and differentiates single-phase or two phase voltages are lost; The variable quantity of losing the front and back electric current by the detection three-phase voltage approaches the zero three-phase pressure loss under the normal load situation of differentiating; Electric current changes before and after the current sensor detection charging, and three-phase voltage is lost when comprehensively judging line charging by electric current variation of detected charging front and back and three-phase voltage value; When all having TV loop abnormal signal, each protective relaying device do not send sampled data, execution in step (3) to Surveillance center according to the fixed frequency circulation; When arbitrary protective relaying device detects TV loop abnormal signal, send corresponding TV loop abnormal alarm signal, execution in step (5) to Surveillance center immediately;
(3) calculate the mean value of the corresponding phase voltage of each protective relaying device;
(4) Surveillance center calculates the absolute value of each phase voltage with the difference of corresponding phase voltage mean value of each protective relaying device respectively, if the absolute value of the difference of being calculated promptly sends relevant voltage acquisition circuit abnormal alarm signal greater than setting preset value;
(5) according to TV loop abnormal alarm signal and voltage acquisition circuit abnormal alarm signal, unusual circuit is positioned, method is: if exist TV loop abnormality alarming signal, Surveillance center directly to point out corresponding TV loop unusual; Otherwise further judge the absolute value of each phase voltage with the difference of corresponding phase voltage mean value of each protective relaying device, unusual if the absolute value of the difference of being calculated, can be decided to be the corresponding phase voltage acquisition circuit of corresponding protective relaying device greater than setting preset value.
2. method for monitoring voltage acquisition circuit of electric power secondary system as claimed in claim 1; it is characterized in that the computing method of the mean value of the corresponding phase voltage of each protective relaying device described in the step (3) are: the corresponding phase voltage value sum of each protective relaying device sampling is divided by the total number of protective relaying device.
3. method for monitoring voltage acquisition circuit of electric power secondary system as claimed in claim 1 is characterized in that, the sampling electric parameters of each protective relaying device and TV loop abnormality alarming signal are sent to Surveillance center in the mode of remote measurement value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009103097807A CN101718813B (en) | 2009-11-16 | 2009-11-16 | Method for monitoring voltage acquisition circuit of electric power secondary system |
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| CN2009103097807A CN101718813B (en) | 2009-11-16 | 2009-11-16 | Method for monitoring voltage acquisition circuit of electric power secondary system |
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| CN101718813A CN101718813A (en) | 2010-06-02 |
| CN101718813B true CN101718813B (en) | 2011-08-17 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102928737A (en) * | 2012-11-01 | 2013-02-13 | 航天科工深圳（集团）有限公司 | Fault detection system and method |
| CN106461718B (en) * | 2014-07-17 | 2020-07-10 | 西门子公司 | Method and device for facilitating wire breakage detection |
| CN104280632B (en) * | 2014-09-28 | 2017-01-11 | 国家电网公司 | Automatic detecting and early warning method for relay protection device and fault recorder |
| CN108321778B (en) * | 2016-08-31 | 2019-08-20 | 中腾微网（北京）科技有限公司 | The guard method of the relay protection of route and equipment in a kind of micro-capacitance sensor |
| CN110134709B (en) * | 2019-04-12 | 2023-06-09 | 云南电网有限责任公司曲靖供电局 | Power grid data query method and device |
| CN110988515A (en) * | 2019-11-06 | 2020-04-10 | 汪祺航 | Voltage channel sampling abnormity detection method of transformer substation relay protection device |
| CN113009265A (en) * | 2021-03-18 | 2021-06-22 | 国网山西省电力公司晋城供电公司 | Relay protection equipment inspection method and device, storage medium and electronic equipment |
| CN113296041B (en) * | 2021-04-30 | 2022-11-29 | 广东电网有限责任公司 | Method and device for monitoring abnormity of voltage sensor |
| CN115684844B (en) * | 2023-01-03 | 2023-05-16 | 国网江西省电力有限公司电力科学研究院 | Voltage sampling loop abnormality diagnosis method and system based on dynamic record data |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101286635A (en) * | 2007-04-11 | 2008-10-15 | 黄沛昕 | Synthetic monitoring method and device in medium-voltage power supply system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101286635A (en) * | 2007-04-11 | 2008-10-15 | 黄沛昕 | Synthetic monitoring method and device in medium-voltage power supply system |
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| Title |
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| JP特开2006-14416A 2006.01.12 |
| JP特开2007-78501A 2007.03.29 |
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