阅读说明：本技术 用于检测电压互感器二次回路绕组短路的检测验证方法 (For detecting the detection verification method of Secondary Circuit of Potential Transformer winding short circuit ) 是由 向超 蔡余鹏 易宁 苏鉴湖 黄岩 齐书云 周保瑞 于 2019-08-28 设计创作，主要内容包括：本发明公开了一种用于检测电压互感器二次回路绕组短路的检测验证方法,涉及发电厂/变电站中电压互感器的调试维修领域,包括如下处理步骤：逐个测量每个二次绕组的电参数以得到每个二次绕组的测量电参数；分别将每个二次绕组的所述测量电参数与本绕组的第一预设电参数值进行比较,判断对应的二次绕组是否发生短路,得到每个二次绕组的判断结果；当判断结果为每个二次绕组均未发生短路条件下、逐个对每个二次绕组未发生短路的判断结果进行验证。本发明通过测量、判断、验证的检查流程,能够快速有效检测验证二次绕组是否短路,且检测验证使用的仪器轻便,操作简单、可靠安全,有效降低了人因失误造成电压互感器二次短路故障的概率。(The invention discloses a kind of for detecting the detection verification method of Secondary Circuit of Potential Transformer winding short circuit, it is related to the debugging maintenance field of voltage transformer in power plant/substation, including following processing step: measuring the electrical parameter of each secondary winding one by one to obtain the measurement electrical parameter of each secondary winding；The measurement electrical parameter of each secondary winding is compared with the first default electrical parameter values of this winding respectively, judges whether corresponding secondary winding occurs short circuit, obtains the judging result of each secondary winding；When judging result is that the judging result that each secondary winding does not occur that short circuit does not occur to each secondary winding under short circuit condition, one by one is verified.The check process that the present invention passes through measurement, judgement, verifying, it is whether short-circuit that verifying secondary winding can quickly and effectively be detected, and the instrument that detection verifying uses is light, and it is easy to operate, reliable and secure, effectively reduce the probability that human-equation error causes voltage transformer secondary short trouble.)

1. a kind of for detecting the detection verification method of Secondary Circuit of Potential Transformer winding short circuit, the voltage transformer is at least Including one group of first winding and two groups of secondary windings, which is characterized in that described method includes following steps:

Measuring process: the electrical parameter of each secondary winding is measured one by one to obtain the measurement electrical parameter of each secondary winding；

Judgment step: the first default electrical parameter values of the measurement electrical parameter of each secondary winding and this winding are carried out respectively Compare, judge whether corresponding secondary winding occurs short circuit, obtains the judging result of each secondary winding；

Verification step: when judging result is that each secondary winding does not occur under short circuit condition, one by one to each secondary winding not The judging result that short circuit occurs is verified.

2. detection verification method according to claim 1, which is characterized in that described when judging result is each secondary winding The step of judging result for not occurring that short circuit does not occur to each secondary winding under short circuit condition, one by one is verified includes such as Lower processing:

Secondary winding will be verified by determining one, respectively to the secondary winding for needing to verify and other secondary windings setting short circuit behaviour Under work, the electrical parameter of this that be verified secondary winding is measured respectively, is verified electrical parameter, by each verifying electrical parameter and verifying Secondary winding measure electrical parameter carry out difference comparsion, if difference be greater than the second preset value, verify the secondary winding do not occur it is short Road；Successively separately verify all secondary windings.

3. detection verification method according to claim 2, it is characterised in that: two groups of secondary windings include first secondary Winding and second secondary winding, when the measurement electrical parameter of the first secondary winding and second secondary winding be respectively greater than it is corresponding it is secondary around Group the first preset value when, tentatively judge that short circuit does not occur for corresponding secondary winding, when judging result be the first secondary winding and Second secondary winding does not occur under short circuit condition, and short circuit does not occur to the first secondary winding and second secondary winding one by one and sentences Disconnected result is verified.

4. detection verification method according to claim 3, it is characterised in that:

It is specific that the judging result that short circuit does not occur to the first secondary winding and second secondary winding one by one carries out verification step Including handling as follows:

The first secondary winding is verified, in the case where carrying out short circuit respectively to the first secondary winding or second secondary winding, measurement the The electrical parameter of one secondary winding obtains two verifying electrical parameters of the first secondary winding, by two verifyings electricity of the first secondary winding Parameter is compared two differences that the first secondary winding is calculated with the measurement electrical parameter of the first secondary winding respectively, if the One difference of secondary winding two is greater than the second preset value of the first secondary winding, then verification result is that the first secondary winding does not occur Short circuit；

Second secondary winding is verified, in the case where carrying out short circuit respectively to second secondary winding or the first secondary winding, measurement the The electrical parameter of two secondary windings obtains two verifying electrical parameters of second secondary winding, by two verifyings electricity of second secondary winding Parameter is compared two differences that second secondary winding is calculated with the measurement electrical parameter of second secondary winding respectively, if the Two differences of two secondary windings are greater than the second preset value of second secondary winding, then verification result is that second secondary winding is not sent out Raw short circuit.

5. detection verification method according to claim 4, it is characterised in that:

The measurement electrical parameter includes the voltage parameter for measuring the first secondary winding and second secondary winding, using battery and voltage Table is connected respectively the winding terminal in the first secondary winding and second secondary winding, checks voltage by battery and voltmeter method The secondary circuit of mutual inductor whether there is short trouble.

6. detection verification method according to claim 4, it is characterised in that:

The measurement voltage parameter for obtaining first secondary winding includes following processing: voltmeter is connected to the first secondary winding Both ends, one end of battery connects one end of second secondary winding, and the other end of battery overlaps the other end of second secondary winding, The voltmeter throw of pointer situation for reading the first secondary winding of connection during the lapping process obtains the measurement electricity of the first secondary winding Press parameter；

The measurement voltage parameter for obtaining the second secondary winding includes following processing: voltmeter is connected to second secondary winding Both ends, one end of battery connects one end of the first secondary winding, and the other end of battery overlaps the other end of the first secondary winding, The voltmeter throw of pointer situation for connecting second secondary winding is read during the lapping process, obtains the measurement electricity of second secondary winding Press parameter.

7. detection verification method according to claim 6, it is characterised in that:

Carrying out verification process to the measurement voltage parameter of obtained first and second secondary winding includes:

The first or second secondary winding for connecting the voltmeter is shorted respectively, and battery one end is respectively corresponded into overlap joint In one end of the second or first secondary winding, the first certificate parameter of the first secondary winding, the first secondary winding are respectively obtained Second certificate parameter of the second certificate parameter, the first certificate parameter of second secondary winding and second secondary winding；

By each certificate parameter be not shorted between measurement voltage parameter be compared, if to be greater than its corresponding second pre- for difference If value, judges that short circuit does not occur for the first secondary winding and second secondary winding.

8. detection verification method according to claim 3, it is characterised in that:

A winding is connected using inductance measuring meter, measures the inductance parameters of the winding, then inductance measuring meter is connected other one A winding, to measure the inductance parameters of each winding one by one, will the obtained inductance parameters of measurement and the first preset inductance value into Row compares, and judges whether corresponding secondary winding occurs short circuit, obtains the judging result of each secondary winding, if short circuit occurs, Measurement terminates, if short circuit does not occur for judgement, enters verification step.

9. detection verification method according to claim 8, which is characterized in that the inductance parameters of each winding of the measurement with And the step of verifying corresponding inductance parameters, specifically includes following processing:

Measuring process: secohmmeter is connected to the both ends of the first secondary winding or second secondary winding, and second secondary winding is opened Road or the first secondary winding, measurement obtains the inductance parameters of the first secondary winding or second secondary winding respectively；

Secohmmeter: being connected the both ends of the first secondary winding or second secondary winding by verification step first, be shorted first it is secondary around The first secondary winding of secohmmeter or the inductance parameters of second secondary winding are read in the both ends of group or second secondary winding, respectively Obtain the first secondary winding first verifying inductance parameters, the first secondary winding second verifying inductance parameters, it is second secondary around First verifying inductance parameters of group and the second verifying inductance parameters of second secondary winding；

By each verifying inductance parameters be not shorted between measurement inductance parameters be compared, if difference be greater than its corresponding the Two default inductance values judge that short circuit does not occur for the first secondary winding and second secondary winding.

10. according to any detection verification method of claim 5-7, it is characterised in that:

Battery case step is made, is fixed in battery case using 2 section 9V batteries, battery case draws wiring.

Technical field

It is the present invention relates to the debugging maintenance of voltage transformer in power plant/substation, in particular to a kind of for detecting electricity Press the detection verification method of transformer secondary circuit winding short circuit.

Background technique

For voltage transformer (hereinafter referred to as PT), in its operation, if short trouble, secondary winding occur for secondary winding Very big short circuit current can be generated, PT is caused to burn, therefore will check PT secondary winding before PT operation, confirmation is without short-circuit event Barrier.

The existing main method for checking PT secondary winding short trouble is that measurement PT winding directly hinders and PT no-load voltage ratio.Such as Fig. 1 institute Show, the method that measurement PT winding directly hinders are as follows: air switch 1JA, 2JA in open terminal case are opened using general-purpose table look-up air The resistance value for closing downstream load circuit since PT secondary circuit load resistance is generally all very big, therefore passes through measurement load loop Resistance value is easy to judge PT secondary load with the presence or absence of short trouble.But PT secondary winding directly hinders very little, generally less than 0.5 Ω, so being difficult to measure resistance value with multimeter to judge PT secondary winding and lead-out wire with the presence or absence of short trouble；It is another The conventional method for checking PT secondary winding short trouble is measurement PT no-load voltage ratio, but when encountering PT secondary winding short trouble, is held Measuring instrument easy to damage.And measurement PT winding directly hinders and the instrument of PT no-load voltage ratio is cumbersome, instrument, which needs to connect external power supply, can just make With time of measuring is more long.Voltage transformer will carry out scheduled maintenance every year, a kind of for detecting voltage therefore, it is necessary to design The detection verification method of transformer secondary circuit winding short circuit not only ensures voltage transformer stable operation, also saves PT power transmission The time of operation.

Summary of the invention

In order to solve problems in the prior art, the present invention provides one kind for detecting Secondary Circuit of Potential Transformer winding Short circuit can effectively reduce the detection verification method that human-equation error causes voltage transformer secondary short trouble probability.

The technical solution that the present invention is proposed with regard to above-mentioned technical problem is as follows: one kind is returned for detecting voltage transformer secondary The detection verification method of road winding short circuit, the voltage transformer include at least one group of first winding and two groups of secondary windings, institute The method of stating includes the following steps:

S1, measuring process: the electrical parameter of each secondary winding is measured one by one to obtain the measurement electricity of each secondary winding ginseng Number；

S2, judgment step: respectively by the first default electricity ginseng of the measurement electrical parameter of each secondary winding and this winding Numerical value is compared, and judges whether corresponding secondary winding occurs short circuit, obtains the judging result of each secondary winding；

S3, verification step: each secondary winding does not occur not occurring under short circuit condition, one by one to each secondary winding short The judging result on road is verified.

Wherein, it is described when judging result be each secondary winding do not occur under short circuit condition, one by one to it is each it is secondary around Judging result the step of being verified that short circuit does not occur for group includes following processing: determine that will verify a secondary winding, point Under the other secondary winding verified to needs and other secondary windings setting short circuit operation, this that be verified secondary winding is measured respectively Electrical parameter, be verified electrical parameter, by each verifying electrical parameter and verifying secondary winding measurement electrical parameter carry out difference comparsion, If difference is greater than the second preset value, verifies the secondary winding and short circuit does not occur；Successively separately verify all secondary windings.

Wherein, two groups of secondary windings include the first secondary winding and second secondary winding, when the first secondary winding and When the measurement electrical parameter of second secondary winding is respectively greater than the first preset value of corresponding secondary winding, tentatively judge corresponding secondary Short circuit does not occur for winding, when judging result is that the first secondary winding and second secondary winding do not occur under short circuit condition, one by one The judging result that short circuit does not occur to the first secondary winding and second secondary winding is verified.

Wherein, the judging result that short circuit does not occur to the first secondary winding and second secondary winding one by one is verified Step specifically includes following processing:

The first secondary winding is verified, in the case where carrying out short circuit respectively to the first secondary winding or second secondary winding, is surveyed The electrical parameter of one secondary winding of flow control obtains two verifying electrical parameters of the first secondary winding, and two of the first secondary winding are tested Card electrical parameter is compared two differences that the first secondary winding is calculated with the measurement electrical parameter of the first secondary winding respectively, If the first difference of secondary winding two be greater than the first secondary winding the second preset value, verification result be the first secondary winding not Short circuit occurs；Second secondary winding is verified, in the case where carrying out short circuit respectively to second secondary winding or the first secondary winding, is surveyed The electrical parameter of two secondary winding of flow control obtains two verifying electrical parameters of second secondary winding, and two of second secondary winding are tested Card electrical parameter is compared two differences that second secondary winding is calculated with the measurement electrical parameter of second secondary winding respectively, If two differences of second secondary winding are greater than the second preset value of second secondary winding, verification result is second secondary winding Short circuit does not occur.

Wherein, the measurement electrical parameter includes the voltage parameter for measuring the first secondary winding and second secondary winding, is used Battery and voltmeter are connected respectively the winding terminal in the first secondary winding and second secondary winding, pass through battery and voltmeter Method checks that the secondary circuit of voltage transformer whether there is short trouble.

Wherein, the measurement voltage parameter for obtaining first secondary winding includes following processing: voltmeter is connected to the The both ends of one secondary winding, one end of battery connect one end of second secondary winding, the other end overlap joint of battery it is second secondary around The other end of group reads the voltmeter throw of pointer situation of the first secondary winding of connection during the lapping process, it is secondary to obtain first The measurement voltage parameter of winding；The measurement voltage parameter for obtaining the second secondary winding includes following processing: voltmeter is connected It connects at the both ends of second secondary winding, one end of battery connects one end of the first secondary winding, the other end overlap joint first of battery The other end of secondary winding reads the voltmeter throw of pointer situation for connecting second secondary winding during the lapping process, obtains the The measurement voltage parameter of two secondary windings.

Wherein, carrying out verification process to the measurement voltage parameter of obtained first and second secondary winding includes: point It is other that the first or second secondary winding for connecting the voltmeter is shorted, and battery one end is respectively corresponded and is overlapped on second Or first secondary winding one end, respectively obtain the first certificate parameter of the first secondary winding, the second of the first secondary winding is tested Demonstrate,prove parameter, the second certificate parameter of the first certificate parameter of second secondary winding and second secondary winding；By each certificate parameter It is compared with the measurement voltage parameter between not being shorted, if difference is greater than its corresponding second preset value, judges that first is secondary Short circuit does not occur for winding and second secondary winding.

Wherein, a winding is connected using inductance measuring meter, measures the inductance parameters of the winding, then inductance measuring meter is connected Another winding is connect, to measure the inductance parameters of each winding one by one, the inductance parameters and first that measurement is obtained are preset Inductance value is compared, and judges whether corresponding secondary winding occurs short circuit, obtains the judging result of each secondary winding, if hair Raw short circuit, measurement terminate, if short circuit does not occur for judgement, enter verification step.

Wherein, the step of inductance parameters of each winding of measurement and verifying correspond to inductance parameters specifically includes as follows Processing: measuring process: secohmmeter is connected to the both ends of the first secondary winding or second secondary winding, and second secondary winding is opened Road or the first secondary winding, measurement obtains the inductance parameters of the first secondary winding or second secondary winding respectively；Verification step: first The both ends that secohmmeter is first connected to the first secondary winding or second secondary winding, are shorted the first secondary winding or second secondary winding Both ends, read the first secondary winding of secohmmeter or the inductance parameters of second secondary winding, respectively obtain the first secondary winding First verifying inductance parameters, the first secondary winding second verifying inductance parameters, second secondary winding first verifying inductance Second verifying inductance parameters of parameter and second secondary winding；Measurement inductance between not being shorted each verifying inductance parameters and Parameter is compared, if difference is greater than its corresponding second default inductance value, judges the first secondary winding and second secondary winding Short circuit does not occur.

Wherein: further including production battery case step, be fixed in battery case using 2 section 9V batteries, battery case draws wiring.

Technical solution provided in an embodiment of the present invention has the benefit that

It is provided in an embodiment of the present invention a kind of for detecting the detection authentication of Secondary Circuit of Potential Transformer winding short circuit Method, by measuring the electrical parameter of each secondary winding one by one to obtain the measurement electrical parameter of each secondary winding；It respectively will be each The measurement electrical parameter of secondary winding is compared with the first default electrical parameter values of this winding, whether judges corresponding secondary winding Short circuit occurs, obtains the judging result of each secondary winding；When judging result is that short circuit condition does not occur for each secondary winding Under, one by one to each secondary winding do not occur short circuit judging result verify.This measurement and verification step is easy to operate can It leans on, effectively reduces the probability that human-equation error causes voltage transformer secondary short trouble；And the measuring instrument used is simple It is light.

Detailed description of the invention

To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other Attached drawing.

Fig. 1 is the application scenario diagram of the prior art；

Fig. 2 is the second loop return wiring schematic diagram of voltage transformer of the present invention；

Fig. 3 is the embodiment of the present invention one for detecting the detection verification method of Secondary Circuit of Potential Transformer winding short circuit General flow chart；

Fig. 3 a is that the verifying electrical parameter of the embodiment of the present invention one obtains flow chart；

Fig. 3 b is the judgment step flow chart of the verification process of the embodiment of the present invention one；

Fig. 3 c is the measurement electric parameter measurement flow chart of steps of the embodiment of the present invention one；

Fig. 3 d is the verification process flow chart of the embodiment of the present invention one；

Fig. 4 is the step flow chart that the battery method of the embodiment of the present invention two checks the PT of PT secondary winding short trouble；

Fig. 5 is the schematic diagram that a kind of battery method provided by Embodiment 2 of the present invention checks PT secondary winding short trouble；

Fig. 6 is the PT second short circuit that a kind of battery method provided by Embodiment 2 of the present invention checks PT secondary winding short trouble Failure schematic diagram；

Fig. 7 is the PT step that a kind of inductance measuring that the embodiment of the present invention three provides checks PT secondary winding short trouble Flow chart；

Fig. 8 is that a kind of inductance measuring that the embodiment of the present invention three provides checks that the PT of PT secondary winding short trouble is equivalent Circuit diagram.

Specific embodiment

, instrument needs cumbersome with the instrument of PT no-load voltage ratio are directly hindered in order to solve the measurement PT winding in the presence of the prior art Connecing external power supply could use, and time of measuring is more long, and because secondary windings of PT directly hinder it is inclined smaller, using measurement The method that PT winding directly hinders be easy to cause no judgement, using the method for measurement PT no-load voltage ratio, when encountering PT secondary winding short trouble When, the problem of being easily damaged measuring instrument, the present invention is intended to provide a kind of verifying secondary winding short-circuit conditions of can effectively detecting Method, core concept are: providing a kind of for detecting the detection verification method of Secondary Circuit of Potential Transformer winding short circuit, sheet Invention uses electric parameter measurement instrument, measures the measurement electrical parameter of secondary winding first, then with the first preset value for having provided It is compared.If measuring electrical parameter less than the first preset value, it is judged as that short circuit occurs for secondary winding.If measurement electrical parameter is greater than First preset value is then tentatively judged as that short circuit does not occur for secondary winding.It is the feelings that secondary winding is generation short circuit in judging result Under condition, the verifying electrical parameter of secondary winding is measured, measurement electrical parameter and verifying electrical parameter are subjected to difference calculating, if difference calculates Result be greater than the second preset value for having provided, then it is not short-circuit to verify secondary winding.Otherwise authentication failed needs to re-start inspection Test card process, or search the reason of other lead to authentication failed.By this method, verifying secondary winding can be effectively detected It is whether short-circuit, and the instrument that detection verifying uses is light, operation is simple and reliable, and then effectively reduces human-equation error and cause voltage The probability of mutual inductor second short circuit failure.