CN102721850A - Measuring method for fundamental wave component of resistive current of zinc oxide arrester - Google Patents
Measuring method for fundamental wave component of resistive current of zinc oxide arrester Download PDFInfo
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Abstract
本发明公开了一种氧化锌避雷器阻性电流的基波分量的测量方法，包括步骤:测得氧化锌避雷器的全电流和母线电压；通过傅里叶变换得到所述全电流的基波分量i1以及母线电压的基波分量u1，并得到全电流的基波分量i1和母线电压的基波分量u1的相位角将全电流的基波分量i1在母线电压的基波分量u1上投影，得到阻性电流的基波分量ir1。本发明简单快速的测得氧化锌避雷器阻性电流的基波分量，对维护氧化锌避雷器的正常运行有很大的实际意义。The invention discloses a method for measuring the fundamental wave component of the resistive current of a zinc oxide arrester, comprising the steps of: measuring the full current and bus voltage of the zinc oxide arrester; obtaining the fundamental wave component i of the full current through Fourier transform 1 and the fundamental wave component u 1 of the bus voltage, and get the phase angle between the fundamental wave component i 1 of the full current and the fundamental wave component u 1 of the bus voltage Project the fundamental wave component i 1 of the full current on the fundamental wave component u 1 of the bus voltage to obtain the fundamental wave component i r1 of the resistive current. The invention simply and quickly measures the fundamental wave component of the resistive current of the zinc oxide arrester, and has great practical significance for maintaining the normal operation of the zinc oxide arrester.
Description
技术领域 technical field
本发明涉及一种氧化锌避雷器（MOA）阻性电流的基波分量的测量方法。The invention relates to a method for measuring the fundamental wave component of the resistive current of a zinc oxide arrester (MOA).
背景技术 Background technique
氧化锌避雷器（MOA）由于体积小、造价低、非线性特性好、通流量大等优点，是电力系统中重要的过电压保护设备。随着MOA在电力系统中广泛应用，MOA在充分显示其优越性的同时，也暴露了其缺点和不足，容易出现受潮、老化等故障。MOA阻性电流反映了其运行状况，阻性电流的基波分量是MOA的一个重要的特征参数，虽然在总泄漏电流中所占的比重很小，但是却跟MOA的绝缘性能及运行情况有着密切的关系，无论是阀片老化还是内部受潮，都会引起阻性电流的基波分量发生变化，因此对运行中的MOA阻性电流的基波分量的测量就显得很有必要。本申请人也致力于这方面的研究。Zinc oxide surge arrester (MOA) is an important overvoltage protection device in power system due to its small size, low cost, good nonlinear characteristics, and large flow rate. With the wide application of MOA in power system, while MOA fully demonstrates its superiority, it also exposes its shortcomings and deficiencies, such as moisture, aging and other failures. The resistive current of MOA reflects its operating condition. The fundamental component of resistive current is an important characteristic parameter of MOA. Although it accounts for a small proportion in the total leakage current, it is related to the insulation performance and operating condition of MOA. Whether it is the aging of the valve plate or the internal damp, it will cause the fundamental wave component of the resistive current to change, so it is necessary to measure the fundamental wave component of the resistive current of the MOA in operation. The applicant is also committed to research in this area.
发明内容 Contents of the invention
本发明的目的在于提供一种氧化锌避雷器阻性电流的基波分量的测量方法，简单快速的测得氧化锌避雷器阻性电流的基波分量，对维护氧化锌避雷器的正常运行有很大的实际意义。The purpose of the present invention is to provide a method for measuring the fundamental wave component of the resistive current of a zinc oxide arrester, which can simply and quickly measure the fundamental wave component of the resistive current of the zinc oxide arrester, which is of great importance to the maintenance of the normal operation of the zinc oxide arrester practical significance.
实现上述目的的技术方案是：The technical scheme for realizing the above-mentioned purpose is:
一种氧化锌避雷器阻性电流的基波分量的测量方法，所述氧化锌避雷器连接电网，包括下列步骤:A method for measuring the fundamental wave component of the resistive current of a zinc oxide arrester, wherein the zinc oxide arrester is connected to the grid, comprising the following steps:
步骤一，利用电流互感器测得氧化锌避雷器的全电流；Step 1, using a current transformer to measure the full current of the zinc oxide arrester;
步骤二，利用电压互感器测得母线电压；Step 2, using a voltage transformer to measure the bus voltage;
步骤三，通过傅里叶变换得到所述全电流的基波分量i1以及母线电压的基波分量u1，并得到全电流的基波分量i1和母线电压的基波分量u1的相位角
步骤四，将全电流的基波分量i1在母线电压的基波分量u1上投影，得到阻性电流的基波分量ir1。Step 4: Project the fundamental wave component i 1 of the full current on the fundamental wave component u 1 of the bus voltage to obtain the fundamental wave component i r1 of the resistive current.
上述的氧化锌避雷器阻性电流的基波分量的测量方法中，所述步骤四中，所述投影的计算公式为：
本发明的有益效果是：本发明能简单快速的测得氧化锌避雷器阻性电流的基波分量，测量效率高，准确率高，对维护氧化锌避雷器的正常运行有很大的实际意义。The beneficial effects of the invention are: the invention can simply and quickly measure the fundamental wave component of the resistive current of the zinc oxide arrester, has high measurement efficiency and high accuracy, and has great practical significance for maintaining the normal operation of the zinc oxide arrester.
具体实施方式 Detailed ways
下面对本发明作进一步说明。The present invention will be further described below.
氧化锌避雷器连接电网，本发明的氧化锌避雷器阻性电流的基波分量的测量方法，包括下列步骤:The zinc oxide arrester is connected to the grid, and the method for measuring the fundamental wave component of the zinc oxide arrester resistive current of the present invention comprises the following steps:
步骤一，利用电流互感器测得氧化锌避雷器的全电流；Step 1, using a current transformer to measure the full current of the zinc oxide arrester;
步骤二，利用电压互感器测得母线电压，即从电压互感器的二次侧测得；Step 2, using the voltage transformer to measure the bus voltage, namely measured from the secondary side of the voltage transformer;
步骤三，通过傅里叶变换得到所述全电流的基波分量i1以及母线电压的基波分量u1，并得到全电流的基波分量i1和母线电压的基波分量u1的相位角
步骤四，将全电流的基波分量i1在母线电压的基波分量u1上投影，得到阻性电流的基波分量ir1，所述投影的计算公式为：从而根据阻性电流的基波分量ir1的变化来判断氧化锌避雷器的运行状况。Step 4: Project the fundamental wave component i 1 of the full current on the fundamental wave component u 1 of the bus voltage to obtain the fundamental wave component i r1 of the resistive current. The calculation formula for the projection is: Therefore, the operating condition of the zinc oxide arrester can be judged according to the change of the fundamental wave component i r1 of the resistive current.
以上实施例仅供说明本发明之用，而非对本发明的限制，有关技术领域的技术人员，在不脱离本发明的精神和范围的情况下，还可以作出各种变换或变型，因此所有等同的技术方案也应该属于本发明的范畴，应由各权利要求所限定。The above embodiments are only for the purpose of illustrating the present invention, rather than limiting the present invention. Those skilled in the relevant technical fields can also make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent The technical solutions should also belong to the category of the present invention and should be defined by each claim.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728481A (en) * | 2013-12-30 | 2014-04-16 | 国家电网公司 | Method and device for detecting metal oxide arrester resistive current |
| CN104330650A (en) * | 2014-09-22 | 2015-02-04 | 广东电网公司东莞供电局 | Total current based live-line test method of zinc oxide lightning arrester group |
| CN104849530A (en) * | 2015-05-19 | 2015-08-19 | 江苏理工学院 | A method for measuring fundamental wave of MOA resistive current |
| CN104865438A (en) * | 2015-06-15 | 2015-08-26 | 江苏理工学院 | Method for measuring resistive current fundamental wave of zinc oxide arrester |
| CN105044524A (en) * | 2015-08-10 | 2015-11-11 | 许继集团有限公司 | Lightning arrester monitoring method applicable to intelligent transformer station and system |
| CN105044437A (en) * | 2015-08-07 | 2015-11-11 | 南方电网科学研究院有限责任公司 | Method for Measuring the Resistive Current of Metal Oxide Surge Arresters |
| CN106483360A (en) * | 2015-08-26 | 2017-03-08 | 国网河南省电力公司检修公司 | Method using 220V power supply on-line monitoring arrester resistance current |
| CN106771719A (en) * | 2016-11-28 | 2017-05-31 | 唐恩(厦门)电气有限公司 | A kind of metal oxide arrester tester |
| CN107607809A (en) * | 2017-09-01 | 2018-01-19 | 南京创博电子有限公司 | Voltage-limiting surge protector is resistive and the device of capacity current for a kind of detection |
| CN111521903A (en) * | 2020-07-03 | 2020-08-11 | 长沙润迅通信设备有限公司 | SPD resistive current online intelligent monitoring device and monitoring method |
| CN112362988A (en) * | 2020-10-28 | 2021-02-12 | 国网江苏省电力有限公司电力科学研究院 | Lightning arrester resistive current on-line monitoring system and method |
| CN119827923A (en) * | 2024-12-26 | 2025-04-15 | 安徽凯川电力保护设备有限公司 | Lightning arrester type insulation monitoring device |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728481A (en) * | 2013-12-30 | 2014-04-16 | 国家电网公司 | Method and device for detecting metal oxide arrester resistive current |
| CN104330650A (en) * | 2014-09-22 | 2015-02-04 | 广东电网公司东莞供电局 | Total current based live-line test method of zinc oxide lightning arrester group |
| CN104849530A (en) * | 2015-05-19 | 2015-08-19 | 江苏理工学院 | A method for measuring fundamental wave of MOA resistive current |
| CN104865438A (en) * | 2015-06-15 | 2015-08-26 | 江苏理工学院 | Method for measuring resistive current fundamental wave of zinc oxide arrester |
| CN105044437A (en) * | 2015-08-07 | 2015-11-11 | 南方电网科学研究院有限责任公司 | Method for Measuring the Resistive Current of Metal Oxide Surge Arresters |
| CN105044524A (en) * | 2015-08-10 | 2015-11-11 | 许继集团有限公司 | Lightning arrester monitoring method applicable to intelligent transformer station and system |
| CN106483360A (en) * | 2015-08-26 | 2017-03-08 | 国网河南省电力公司检修公司 | Method using 220V power supply on-line monitoring arrester resistance current |
| CN106483360B (en) * | 2015-08-26 | 2019-03-12 | 国网河南省电力公司检修公司 | A Method of Online Monitoring MOA Resistive Current Using 220V Power Supply |
| CN106771719A (en) * | 2016-11-28 | 2017-05-31 | 唐恩(厦门)电气有限公司 | A kind of metal oxide arrester tester |
| CN107607809A (en) * | 2017-09-01 | 2018-01-19 | 南京创博电子有限公司 | Voltage-limiting surge protector is resistive and the device of capacity current for a kind of detection |
| CN107607809B (en) * | 2017-09-01 | 2024-03-12 | 南京创博电子有限公司 | Device for detecting resistive and capacitive currents of voltage limiting type surge protector |
| CN111521903A (en) * | 2020-07-03 | 2020-08-11 | 长沙润迅通信设备有限公司 | SPD resistive current online intelligent monitoring device and monitoring method |
| CN112362988A (en) * | 2020-10-28 | 2021-02-12 | 国网江苏省电力有限公司电力科学研究院 | Lightning arrester resistive current on-line monitoring system and method |
| CN119827923A (en) * | 2024-12-26 | 2025-04-15 | 安徽凯川电力保护设备有限公司 | Lightning arrester type insulation monitoring device |
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