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CN105319524A - A high tension switchgear partial discharge live detection effectiveness judgment method - Google Patents

A high tension switchgear partial discharge live detection effectiveness judgment method Download PDF

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Publication number
CN105319524A
CN105319524A CN201510785922.2A CN201510785922A CN105319524A CN 105319524 A CN105319524 A CN 105319524A CN 201510785922 A CN201510785922 A CN 201510785922A CN 105319524 A CN105319524 A CN 105319524A
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China
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discharge
voltage
defect
partial discharge
effectiveness
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CN201510785922.2A
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Inventor
范敏
叶会生
段肖力
何智强
谢耀恒
吴水锋
李欣
毛文奇
黄福勇
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hunan Electric Power Co Ltd
State Grid Hunan Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Hunan Electric Power Co Ltd
State Grid Hunan Electric Power Co Ltd
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Priority to CN201510785922.2A priority Critical patent/CN105319524A/en
Publication of CN105319524A publication Critical patent/CN105319524A/en
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Abstract

本发明公开了一种高压开关柜局放带电检测有效性判断方法，步骤包括：配置高压开关柜中的缺陷模拟部件；设置一组电压测试点，针对每一个当前电压测试点，向高压开关柜施加当前电压测试点对应大小的电压激励，检测缺陷模拟部件的视在放电量，且采用被判断局放带电检测方法检测缺陷模拟部件在施加电压激励后的带电检测信号；拟合视在放电量、带电检测信号之间的关系曲线，获取曲线斜率；将曲线斜率判断被判断局放带电检测方法对选择的缺陷类型的有效性。本发明能够进行各种缺陷下不同带电检测方法的信号值和视在放电量测试，通过数据分析以确定针对某种缺陷的不同带电检测方法的有效性，为高压开关柜状态信息收集和缺陷类型判断提供依据。

The invention discloses a method for judging the effectiveness of partial discharge live detection of a high-voltage switchgear. The steps include: configuring defect simulation components in the high-voltage switchgear; Apply the voltage excitation corresponding to the current voltage test point to detect the apparent discharge of the defective analog component, and use the judged partial discharge electrification detection method to detect the charged detection signal of the defective analog component after applying the voltage excitation; fitting the apparent discharge , and the relationship curve between live detection signals to obtain the slope of the curve; judge the effectiveness of the judged partial discharge live detection method for the selected defect type by the slope of the curve. The present invention can test the signal value and apparent discharge of different charging detection methods under various defects, and determine the effectiveness of different charging detection methods for certain defects through data analysis, and collect state information and defect types of high-voltage switch cabinets. provide a basis for judgment.

Description

Live detection Effective judgement method is put in a kind of high-tension switch cabinet office
Technical field
The present invention relates to high-tension switch cabinet office and put live detection and data analysis field, be specifically related to a kind of high-tension switch cabinet office and put live detection Effective judgement method, judge for carrying out analysis to different band electro-detection method validity under the various defect of high-tension switch cabinet, to determine that live detection method is put in the applicable office of the various defect of high-tension switch cabinet.
Background technology
High-tension switch cabinet is the Switch equipment that in electric system, quantity is maximum, widest in area, carries the function directly to customer power supply, and its ruuning situation is directly connected to customer power supply reliability.Because high-tension switch cabinet substantial amounts, routine test cycle are longer, are difficult to Timeliness coverage internal defects, just may there will be insulation fault in the test period.Due to environmental factor or insulating part cause for quality own, high-tension switch cabinet there will be all kinds of defect after long-time running, these defects can cause the generation of shelf depreciation, for timely monitoring switch cabinet operation conditions, find its inner latency defect, rapid to detect the high-tension switch cabinet live detection technical development that Partial discharge signal is means.The state evaluation that live detection technology can be high-tension switch cabinet provides sufficient status information, for its repair based on condition of component provides decision-making foundation.Therefore, high-tension switch cabinet live detection technology is studied to the safe and stable operation and the customer power supply reliability important in inhibiting that ensure high-tension switch cabinet.At present, live detection instrument data is only confined to for the application of switch cabinet partial discharge live detection technology and reads, empirical, subjective; The technical research of high-tension switch cabinet live detection is still in the starting stage, live detection signal and the research of Apparent discharge magnitude relation are tentatively carried out, but not yet there is systematic Study for different band electro-detection method validity under various defect, failing to provide the basis for estimation of defect suitable assay, there is larger difficulty when carrying out defect type and judging in site test personnel.Therefore, carry out high-tension switch cabinet office and put live detection Effective judgement technique study, to improving high-tension switch cabinet live detection technology, auxiliary switch cabinet defect type judges significant.How to realize different band electro-detection method Effective judgement and switch cubicle defect type under the various defect of high-tension switch cabinet to judge, become a key technical problem urgently to be resolved hurrily.
Summary of the invention
The technical problem to be solved in the present invention: for the problems referred to above of prior art, a kind of signal value and the Apparent discharge magnitude test that can carry out different band electro-detection method under various defect are provided, by data analysis to determine the validity of the different band electro-detection method for certain defect, for high-tension switch cabinet state information collection and defect type judge to provide the high-tension switch cabinet office of foundation to put live detection Effective judgement method.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
Live detection Effective judgement method is put in a kind of high-tension switch cabinet office, and step comprises:
1) discharge defect type is selected, according to the defects simulation parts in the discharge defect type configuration high-tension switch cabinet selected;
2) one group of voltage test points is set, for each current voltage test point, testing pressurizing device is utilized to apply the voltage drive of the corresponding size of current voltage test point to the high-tension switch cabinet with defects simulation parts, detect the Apparent discharge magnitude of defects simulation parts, and adopt the office of being judged to put the live detection signal of live detection method detection defects simulation parts after applying voltage drive;
3) Apparent discharge magnitude, the relation curve between live detection signal that obtain of each voltage test points of matching, obtains the rate of curve of the relation curve between described live detection signal and Apparent discharge magnitude k;
4) by described rate of curve kwith the calibration curve slope preset k 0 between rate of curve difference, judge that the validity of live detection method to the defect type selected is put in the office of being judged according to the size comparative result of described rate of curve difference and predetermined threshold value.
Preferably, the discharge defect type selected in described step 1) is the one in point discharge, internal discharge, suspended discharge, creeping discharge.
Preferably, described step 2) in detect defects simulation parts Apparent discharge magnitude specifically refer to the Apparent discharge magnitude adopting pulse current method to detect defects simulation parts.
Preferably, what described employing pulse current method detected the Apparent discharge magnitude of defects simulation parts specifically refers to that the office in advance through demarcating being put detector is connected to high-tension switch cabinet with defects simulation parts by RC divider in detail, apply, in the voltage drive process of the corresponding size of current voltage test point, to put detector by described office and detect the Apparent discharge magnitude obtaining defects simulation parts to the high-tension switch cabinet with defects simulation parts utilizing testing pressurizing device.
Preferably, when judging that the validity of live detection method to the defect type selected is put in the office of being judged according to the size comparative result of described rate of curve difference and predetermined threshold value in described step 4), described predetermined threshold value is 0, if described rate of curve difference is greater than or equal to predetermined threshold value 0, then judge that live detection method is put in the office of being judged high to the validity of defect type selected, otherwise it is low to judge that the validity of live detection method to the defect type selected is put in the office of being judged.
High-tension switch cabinet office of the present invention puts live detection Effective judgement method and has following advantage:
1, the present invention selects discharge defect type, according to the defects simulation parts in the discharge defect type configuration high-tension switch cabinet selected, one group of voltage test points is set, each voltage test points of matching detects the Apparent discharge magnitude, the relation curve between live detection signal that obtain, obtains the rate of curve of the relation curve between live detection signal and Apparent discharge magnitude k, by rate of curve kwith the calibration curve slope preset k 0 between rate of curve difference, size comparative result according to rate of curve difference and predetermined threshold value judges that the validity of live detection method to the defect type selected is put in the office of being judged, utilize live detection signal main relevant with Apparent discharge magnitude, Apparent discharge magnitude and the proportional characteristic of applied voltage, signal value and the Apparent discharge magnitude test of different band electro-detection method under various defect can be carried out, by data analysis to determine the validity of the different band electro-detection method for certain defect, for high-tension switch cabinet state information collection and defect type judge to provide foundation.
2, the present invention can be applicable to the live detection methods such as the detection of transient state earth potential, ultrasound examination and superfrequency detection, and the validity of various live detection method for a certain partial discharge defect type can be detected respectively, under various defect the signal value of different band electro-detection method and Apparent discharge magnitude test authentic and valid, there is the advantage that versatility is good, applied widely.
Accompanying drawing explanation
Fig. 1 is the basic implementing procedure schematic diagram of embodiment of the present invention method.
Fig. 2 is the graph of relation that in embodiment of the present invention method, matching obtains.
Embodiment
As shown in Figure 1, the step that live detection Effective judgement method is put in the present embodiment high-tension switch cabinet office comprises:
1) discharge defect type is selected, according to the defects simulation parts in the discharge defect type configuration high-tension switch cabinet selected;
2) one group of voltage test points is set, for each current voltage test point, testing pressurizing device is utilized to apply the voltage drive of the corresponding size of current voltage test point to the high-tension switch cabinet with defects simulation parts, detect the Apparent discharge magnitude of defects simulation parts, and adopt the office of being judged to put the live detection signal of live detection method detection defects simulation parts after applying voltage drive;
3) Apparent discharge magnitude, the relation curve between live detection signal that obtain of each voltage test points of matching, as shown in Figure 2, obtains the rate of curve of the relation curve between live detection signal and Apparent discharge magnitude k;
4) by rate of curve kwith the calibration curve slope preset k 0 between rate of curve difference, judge that the validity of live detection method to the defect type selected is put in the office of being judged according to the size comparative result of rate of curve difference and predetermined threshold value.
Find through checking, main, the Apparent discharge magnitude relevant with Apparent discharge magnitude of live detection signal and applied voltage proportional: within the scope of certain voltage, applied voltage is higher, then Apparent discharge magnitude is larger, live detection signal is larger.The present embodiment utilize live detection signal mainly with Apparent discharge magnitude about, Apparent discharge magnitude and the proportional characteristic of applied voltage, signal value and the Apparent discharge magnitude test of different band electro-detection method under various defect can be carried out, by data analysis to determine the validity of the different band electro-detection method for certain defect, for high-tension switch cabinet state information collection and defect type judge to provide foundation.
In the present embodiment, high-tension switch cabinet with defects simulation parts specifically adopts high-tension switch cabinet defects simulation and office to put live detection test unit and realizes, high-tension switch cabinet defects simulation and office put live detection test unit and comprise high-tension switch cabinet, and in high-tension switch cabinet, being provided with the alternative defects simulation parts dropped into, the alternative defects simulation parts dropped into comprise point discharge parts, internal discharge parts, suspended discharge parts, creeping discharge parts etc.Therefore accordingly, the discharge defect type selected in the present embodiment step 1) is the one in point discharge, internal discharge, suspended discharge, creeping discharge.
The present embodiment step 2) in, the Apparent discharge magnitude detecting defects simulation parts specifically refers to the Apparent discharge magnitude adopting pulse current method to detect defects simulation parts.In the present embodiment, what adopt pulse current method to detect the Apparent discharge magnitude of defects simulation parts specifically refers to that the office in advance through demarcating being put detector is connected to high-tension switch cabinet with defects simulation parts by RC divider in detail, apply, in the voltage drive process of the corresponding size of current voltage test point, to put detector by office and detect the Apparent discharge magnitude obtaining defects simulation parts to the high-tension switch cabinet with defects simulation parts utilizing testing pressurizing device.When adopting pulse current method to detect the Apparent discharge magnitude of defects simulation parts in the present embodiment, specifically utilizing high-tension switch cabinet defects simulation and office to put, live detection test unit realizes: first high-tension switch cabinet defects simulation and office are put live detection test unit and connect test connection, ensure that ground connection is good, play a game before test and put detector and carry out discharge capacity demarcation; Then utilize testing pressurizing device to the high-tension switch cabinet pressurization of band defect, during pressurization, keep enough safe distances; Then the drawn game of resistive-capacitive voltage divider device is relied on to put the high-tension switch cabinet Apparent discharge magnitude of detector calibration tape defect.
In the present embodiment, when judging that the validity of live detection method to the defect type selected is put in the office of being judged according to the size comparative result of rate of curve difference and predetermined threshold value in step 4), predetermined threshold value is 0, if rate of curve difference is greater than or equal to predetermined threshold value 0, then judge that the validity high (be applicable to the live detection of this kind defect) of live detection method to the defect type selected is put in the office of being judged, otherwise judge that the validity low (be not suitable for the live detection of this kind defect) of live detection method to the defect type selected is put in the office of being judged.It should be noted that, the present embodiment is only be 0 carry out exemplary illustration with predetermined threshold value, certainly, under the inspiration of this predetermined threshold value, those of ordinary skill in the art also can be set to other predetermined threshold value as required, the tolerance that the size increasing rate of curve difference and predetermined threshold value compares, its principle is identical with the present embodiment, does not repeat them here.
The above is only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, and all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (5)

1.一种高压开关柜局放带电检测有效性判断方法，其特征在于步骤包括： 1. A method for judging the effectiveness of partial discharge electrification detection of a high-voltage switchgear, characterized in that the steps include: 1）选择放电缺陷类型，根据选择的放电缺陷类型配置高压开关柜中的缺陷模拟部件； 1) Select the discharge defect type, and configure the defect simulation components in the high-voltage switchgear according to the selected discharge defect type; 2）设置一组电压测试点，针对每一个当前电压测试点，利用试验加压装置向带有缺陷模拟部件的高压开关柜施加当前电压测试点对应大小的电压激励，检测缺陷模拟部件的视在放电量，且采用被判断局放带电检测方法检测缺陷模拟部件在施加电压激励后的带电检测信号； 2) Set a group of voltage test points, and for each current voltage test point, use the test pressure device to apply the voltage excitation corresponding to the current voltage test point to the high-voltage switchgear with defective analog components, and detect the apparent defect of the simulated components. Discharge amount, and use the judged partial discharge electrification detection method to detect the electrification detection signal of the defective analog component after applying voltage excitation; 3）拟合各个电压测试点得到的视在放电量、带电检测信号之间的关系曲线，获取所述带电检测信号和视在放电量之间的关系曲线的曲线斜率k； 3) Fitting the relationship curve between the apparent discharge capacity obtained at each voltage test point and the charging detection signal, and obtaining the curve slope k of the relationship curve between the charging detection signal and the apparent discharge capacity; 4）将所述曲线斜率k减去预设的标定曲线斜率k 0 得到曲线斜率差值，根据所述曲线斜率差值和预设阈值的大小比较结果判断被判断局放带电检测方法对选择的缺陷类型的有效性。 4 ) Subtract the preset calibration curve slope k from the curve slope k to obtain the curve slope difference, and judge the selected partial discharge charging detection method according to the comparison result of the curve slope difference and the preset threshold value. The validity of the defect type. 2.根据权利要求1所述的高压开关柜局放带电检测有效性判断方法，其特征在于，所述步骤1）中选择的放电缺陷类型为尖端放电、内部放电、悬浮放电、沿面放电中的一种。 2. The method for judging the effectiveness of partial discharge charging detection of high-voltage switchgear according to claim 1, characterized in that the discharge defect types selected in step 1) are tip discharge, internal discharge, suspension discharge, and surface discharge. A sort of. 3.根据权利要求2所述的高压开关柜局放带电检测有效性判断方法，其特征在于，所述步骤2）中检测缺陷模拟部件的视在放电量具体是指采用脉冲电流法检测缺陷模拟部件的视在放电量。 3. The method for judging the effectiveness of partial discharge live detection of high-voltage switchgear according to claim 2, characterized in that, in the step 2), the apparent discharge amount of the defect simulation component is detected by using the pulse current method to detect the defect simulation Apparent discharge of a component. 4.根据权利要求3所述的高压开关柜局放带电检测有效性判断方法，其特征在于，所述采用脉冲电流法检测缺陷模拟部件的视在放电量的详细具体是指将预先经过标定的局放检测仪通过阻容分压器连接到带有缺陷模拟部件的高压开关柜，在利用试验加压装置向带有缺陷模拟部件的高压开关柜施加当前电压测试点对应大小的电压激励过程中，通过所述局放检测仪检测得到缺陷模拟部件的视在放电量。 4. The method for judging the effectiveness of partial discharge and electrification detection of high-voltage switchgear according to claim 3, characterized in that, the details of the apparent discharge capacity of the defect simulation component detected by the pulse current method specifically refer to the previously calibrated The partial discharge detector is connected to the high-voltage switchgear with defective analog components through a resistance-capacitance divider. During the process of applying the voltage excitation corresponding to the current voltage test point to the high-voltage switchgear with defective analog components by using the test pressure device , the apparent discharge of the defect simulation component is obtained by detecting the partial discharge detector. 5.根据权利要求1～4中任意一项所述的高压开关柜局放带电检测有效性判断方法，其特征在于，所述步骤4）中根据所述曲线斜率差值和预设阈值的大小比较结果判断被判断局放带电检测方法对选择的缺陷类型的有效性时，所述预设阈值为0，如果所述曲线斜率差值大于或者等于预设阈值0，则判定被判断局放带电检测方法对选择的缺陷类型的有效性高，否则判定被判断局放带电检测方法对选择的缺陷类型的有效性低。 5. The method for judging the effectiveness of partial discharge and charging detection of high-voltage switchgear according to any one of claims 1 to 4, characterized in that, in the step 4), according to the slope difference of the curve and the size of the preset threshold When comparing the results to judge the validity of the judged partial discharge charging detection method for the selected defect type, the preset threshold value is 0, and if the curve slope difference is greater than or equal to the preset threshold value 0, it is judged that the judged PD charging The effectiveness of the detection method for the selected defect type is high, otherwise it is judged that the effectiveness of the PD electrification detection method for the selected defect type is low.
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CN111239559B (en) * 2020-02-06 2022-04-12 云南电网有限责任公司电力科学研究院 Online measurement method for equivalent discharge capacity of line fault arc
CN111539954A (en) * 2020-05-25 2020-08-14 国网湖南省电力有限公司 Method, system and medium for identifying cable buffer layer defect by adopting X-ray digital image characteristics
CN111539954B (en) * 2020-05-25 2024-01-23 国网湖南省电力有限公司 Method, system and medium for identifying cable buffer layer defect by adopting X-ray digital image characteristics
CN111983401A (en) * 2020-08-17 2020-11-24 红相股份有限公司 Method and device for obtaining equivalent relation curve of discharge capacity and signal amplitude
CN113552456A (en) * 2021-07-30 2021-10-26 华能随县界山风电有限责任公司 Switch cabinet partial discharge intensity monitoring method and device and storage medium
CN114034989A (en) * 2021-10-11 2022-02-11 国网河北省电力有限公司检修分公司 High-voltage switch cabinet partial discharge live detection effectiveness judgment system and method

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