CN104597372A - Method for verifying relay protection secondary system - Google Patents
Method for verifying relay protection secondary system Download PDFInfo
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- CN104597372A CN104597372A CN201410858168.6A CN201410858168A CN104597372A CN 104597372 A CN104597372 A CN 104597372A CN 201410858168 A CN201410858168 A CN 201410858168A CN 104597372 A CN104597372 A CN 104597372A
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- current
- current transformer
- primary side
- relay protection
- detecting
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Abstract
The invention relates to a method for verifying a relay protection secondary system; the method is characterized in that protection constant-value inspection is performed in a tandem connection manner; three phases A, B and C at the primary side of a current transformer are connected in series and the current is loaded by a strong-current generator; the method comprises the specific steps: (1) inputting single-phase testing current to the primary side of the current transformer; (2) simultaneously and respectively detecting Aa, Ab and Ac radio current by utilizing an ampere meter at the secondary side of the current transformer; and (3) inputting constant-value current at the primary side of the current transformer and enabling a protector to act. The method for verifying the relay protection secondary system has the advantages of being capable of detecting the integrity and the correctness of the secondary wiring of the current transformer, simultaneously detecting the secondary ratio of the current transformer, detecting the polarity of the current transformer, detecting whether the secondary wiring of the current transformer is grounded with one point and inputting higher testing current (500-1000A) at the primary side so as to simulate failure current.
Description
Technical field
The present invention relates to a kind of method of calibration of relay protection secondary system, belong to electric relay protection field.
Background technology
The method of calibration of relay protection secondary system, usually adopt the current protection definite value method of inspection, concrete grammar is: with reference to accompanying drawing 1, (1) adds test current respectively from primary side three-phase A, B, C of Current Transmit; (2) Aa, Ab, Ac no-load voltage ratio electric current is detected respectively from Current Transmit secondary side; (3) add definite value electric current respectively from Current Transmit primary side three-phase A, B, C, make protective device ZBZ action.
The shortcoming of the current protection definite value method of inspection that employing is conventional is: (1) can not detect the integrality of secondary wiring of current mutual inductor; (2) correctness of secondary wiring of current mutual inductor can not be detected; (3) Current Transformer Secondary no-load voltage ratio can not be detected simultaneously; (4) current transformer polarity can not be detected; (5) secondary wiring of current mutual inductor whether one point earth can not be detected.
Summary of the invention
The object of the invention is the defect in order to overcome above-mentioned prior art, a kind of method of calibration of relay protection secondary system is provided.
Technical scheme of the present invention is as follows:
The present invention adopts tandem to carry out the inspection of protection definite value, and three-phase A, B, C of current transformer primary side are connected in series, use strong current generator loading current, concrete steps are:
(1) single-phase test current is added from current transformer primary side; (2) detect Aa, Ab, Ac no-load voltage ratio electric current respectively from Current Transformer Secondary side reometer simultaneously; (3) add definite value electric current from current transformer primary side, make protective device action.
The strength of current that described strong current generator provides is 500-1000A.
Advantage of the present invention is: the integrality that can detect secondary wiring of current mutual inductor; The correctness of secondary wiring of current mutual inductor can be detected; Current Transformer Secondary no-load voltage ratio can be detected simultaneously; Current transformer polarity can be detected; Secondary wiring of current mutual inductor whether one point earth can be detected; Larger test current (500-1000A) can be added, better simulated failure electric current at primary side.
Accompanying drawing explanation
Fig. 1 is the wiring diagram of the conventional current protection definite value method of inspection;
Fig. 2 is the wiring diagram of the tandem of the present invention protection definite value method of inspection.
In figure: ZBZ-intelligent comprehensive protection device, A1-Current Transmit primary current table, Aa-Current Transmit secondary A phase current table, Ab-Current Transmit quadratic B phase current table, Ac-Current Transmit secondary C phase current table, A0-Aa+Ab+Ac tri-electric current phasors and, A-current transformer A phase, B-current transformer B phase, C-current transformer C phase, I-primary side current.
Embodiment
With reference to accompanying drawing 2; the present invention leads to big current to the action situation of the correctness and protective device that check its second loop return wiring from the primary side of current transformer; A1 is added at current transformer primary side; Current Transformer Secondary side measure Aa Ab Ac A0; calculating no-load voltage ratio is correct; ensure A0=Aa+Ab+Ac, repeat above program, carry out multiple spot detection.To adjust an effect, add definite value electric current from primary side, make protective device action.
The testing equipment used in method of the present invention
| Strong current generator | DDQ | 0-500A | One |
| Alternating current ammeter | T15-A | 0-100A 0.5 grade | One piece |
| Alternating current ammeter | T15-A | 0-10A 0.5 grade | Three pieces |
| Exchange volt ampere meter | T32-VA | 0-30A 0-600V 0.5 grade | One piece |
| Standard current transformer | HL-2 | 15-600/5 0.2 grade | One piece |
| Pressure regulator | 0-250V | One | |
| Tong-type ammeter | T-301 | 50-1000A | One piece |
| Multimeter | Digital | One piece |
The present invention leads to big current to the action situation of the correctness and protective device that check its second loop return wiring from the primary side of current transformer; this is a kind of emulation mode; by practice; this is a kind of effective and requisite inspection method; especially to the inspection of secondary polarity, other method is difficult to replace.
Claims (2)
1. a method of calibration for relay protection secondary system, is characterized in that: adopt tandem to carry out the inspection of protection definite value, three-phase A, B, C of current transformer primary side are connected in series, use strong current generator loading current, concrete steps are:
(1) single-phase test current is added from current transformer primary side;
(2) detect Aa, Ab, Ac no-load voltage ratio electric current respectively from Current Transformer Secondary side reometer simultaneously;
(3) add definite value electric current from current transformer primary side, make protective device action.
2. the method for calibration of relay protection secondary system according to claim 1, is characterized in that: the strength of current that described strong current generator provides is 500-1000A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410858168.6A CN104597372A (en) | 2014-12-31 | 2014-12-31 | Method for verifying relay protection secondary system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410858168.6A CN104597372A (en) | 2014-12-31 | 2014-12-31 | Method for verifying relay protection secondary system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104597372A true CN104597372A (en) | 2015-05-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410858168.6A Pending CN104597372A (en) | 2014-12-31 | 2014-12-31 | Method for verifying relay protection secondary system |
Country Status (1)
| Country | Link |
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| CN (1) | CN104597372A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501660A (en) * | 2016-11-22 | 2017-03-15 | 国家电网公司东北分部 | Using control two-way current phase and the method for amplitude measurement tranformer protection vector |
| CN106646092A (en) * | 2016-12-13 | 2017-05-10 | 中国二冶集团有限公司 | Detection method for secondary system of voltage transformer |
| CN109633352A (en) * | 2018-12-14 | 2019-04-16 | 中冶天工集团有限公司 | The method for checking three-phase or the secondary wiring of biphase current mutual inductor using single-phase alternating current |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7119548B1 (en) * | 2005-11-14 | 2006-10-10 | Honeywell International, Inc. | Current transformer test device and method |
| CN201364372Y (en) * | 2008-12-01 | 2009-12-16 | 北京市电力公司 | Wire connection device and polarity test system and transformation ratio test system comprising same |
| CN102095899A (en) * | 2009-12-14 | 2011-06-15 | 北京市电力公司 | Wiring device and current mutual inductance testing system |
| CN103048586A (en) * | 2012-12-14 | 2013-04-17 | 辽宁省电力有限公司锦州供电公司 | Verification method for wiring correction of voltage transformer |
| CN203465372U (en) * | 2013-09-30 | 2014-03-05 | 福建省电力工程承包公司 | Once through-flow three-phase simultaneous measurement detector for transformer station device |
-
2014
- 2014-12-31 CN CN201410858168.6A patent/CN104597372A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7119548B1 (en) * | 2005-11-14 | 2006-10-10 | Honeywell International, Inc. | Current transformer test device and method |
| CN201364372Y (en) * | 2008-12-01 | 2009-12-16 | 北京市电力公司 | Wire connection device and polarity test system and transformation ratio test system comprising same |
| CN102095899A (en) * | 2009-12-14 | 2011-06-15 | 北京市电力公司 | Wiring device and current mutual inductance testing system |
| CN103048586A (en) * | 2012-12-14 | 2013-04-17 | 辽宁省电力有限公司锦州供电公司 | Verification method for wiring correction of voltage transformer |
| CN203465372U (en) * | 2013-09-30 | 2014-03-05 | 福建省电力工程承包公司 | Once through-flow three-phase simultaneous measurement detector for transformer station device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106501660A (en) * | 2016-11-22 | 2017-03-15 | 国家电网公司东北分部 | Using control two-way current phase and the method for amplitude measurement tranformer protection vector |
| CN106501660B (en) * | 2016-11-22 | 2019-04-12 | 国家电网公司东北分部 | Utilize the method for control two-way current phase and amplitude measurement tranformer protection vector |
| CN106646092A (en) * | 2016-12-13 | 2017-05-10 | 中国二冶集团有限公司 | Detection method for secondary system of voltage transformer |
| CN109633352A (en) * | 2018-12-14 | 2019-04-16 | 中冶天工集团有限公司 | The method for checking three-phase or the secondary wiring of biphase current mutual inductor using single-phase alternating current |
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Application publication date: 20150506 |
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