CN109541406B - GIS on-site impact voltage-withstanding test method - Google Patents
GIS on-site impact voltage-withstanding test method Download PDFInfo
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- CN109541406B CN109541406B CN201811300411.7A CN201811300411A CN109541406B CN 109541406 B CN109541406 B CN 109541406B CN 201811300411 A CN201811300411 A CN 201811300411A CN 109541406 B CN109541406 B CN 109541406B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
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Abstract
本发明涉及一种GIS现场冲击耐压测试的方法。其特点是，包括如下步骤：1)获得被试GIS各个间隔的等值参数，构建GIS分布参数模型；2)根据分布参数模型进行冲击电压在GIS中的分布计算；3)计算GIS各个间隔的冲击电压参数；4)根据参数确定分段个数；5)根据分段个数对GIS进行分段冲击耐压试验。经过试用证明，采用本发明的试验方法，可以通过过电压计算明确被试GIS各个间隔承受过电压的波形参数，从而根据波形参数确定分段个数，保证了试验效率和实现效果。
The invention relates to a method for on-site impact withstand voltage test of GIS. It is characterized in that it includes the following steps: 1) Obtaining the equivalent parameters of each interval of the tested GIS, and constructing a GIS distribution parameter model; 2) Calculating the distribution of the impulse voltage in the GIS according to the distribution parameter model; 3) Calculating the distribution of the GIS in each interval. Impulse voltage parameters; 4) Determine the number of subsections according to the parameters; 5) Perform subsection impulse withstand voltage test on the GIS according to the number of subsections. It has been proved by trial that using the test method of the present invention, the waveform parameters of each interval of the tested GIS withstanding overvoltage can be clarified through overvoltage calculation, so that the number of segments can be determined according to the waveform parameters, which ensures the test efficiency and the realization effect.
Description
Technical Field
The invention relates to a GIS (gas insulated switchgear) on-site impact voltage withstanding test method.
Background
GIS (gas Insulated switch gear) is key equipment in a power grid, has the characteristics of small occupied area, high safety and reliability and easiness in maintenance, and is important power equipment which is used in a large amount in the power grid at present. The field test is a key test item for ensuring the safe operation of the GIS, the field impact voltage-withstand test of the GIS is developed gradually at present, and a batch of novel field-applicable impact voltage-withstand test equipment such as combined type equipment and vehicle-mounted equipment are also put into field use.
When the field impulse withstand voltage test is carried out, the whole GIS to be tested is usually subjected to the whole impulse withstand voltage test by the conventional method at present, but the impulse voltage is transient voltage, the whole GIS is usually large in size and long in bus length, so that the impulse voltage has a wave process in the GIS, and the impulse voltage has waveform distortion when being transmitted along the GIS. The waveform distortion causes that although the injected waveform at the head end of the GIS meets the requirement, the waveform is often not met when the injected waveform is propagated to certain intervals, and the reliability of the test result is caused. Because GIS intervals are numerous, if a single interval is tested, a lot of time and labor are needed, but the test of the whole GIS can cause that the waveform born by certain intervals is not satisfactory.
Disclosure of Invention
The invention aims to provide a GIS on-site impact voltage resistance test method which can realize higher test efficiency and reliability of test results.
A GIS on-site impact voltage resistance test method is characterized by comprising the following steps:
1) obtaining equivalent parameters of each interval of the tested GIS, and constructing a GIS distribution parameter model;
2) performing distribution calculation of the impulse voltage in the GIS according to the distribution parameter model;
3) calculating impulse voltage parameters of each interval of the GIS;
4) determining the number of segments according to the parameters;
5) and carrying out a sectional impact voltage withstand test on the GIS according to the number of the sections.
Trial proves that by adopting the test method, the waveform parameters of overvoltage borne by each interval of the tested GIS can be determined through overvoltage calculation, so that the number of segments is determined according to the waveform parameters, and the test efficiency and the realization effect are ensured.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
The invention provides a GIS on-site impulse withstand voltage test method, which utilizes a mode of advanced calculation to determine the distribution characteristics of waveforms in a tested GIS, and provides the number of segments of the tested GIS according to waveform parameters, thereby ensuring that the waveforms born by each tested GIS interval all meet the standard requirements and improving the test efficiency to the maximum extent.
A GIS on-site impact voltage resistance test method comprises the following steps:
the ATP software mentioned below is a free independent version of EMTP software, which is simulation software for electromagnetic Transient analysis of power systems, and EMTP is an acronym for Electro-Magnetic Transient Program.
1) Obtaining equivalent parameters of all intervals of the tested GIS, wherein the parameters can be obtained by calculation or measurement according to the size structure of the GIS, and parameters obtained by calculation or measurement of the GIS size can be increased, a GIS distribution parameter model of all intervals of the tested GIS can be built (in software such as ATP (automatic train protection) and the like), and specifically, after the parameters are obtained by calculation or measurement, a circuit parameter model can be built and is built based on the obtained parameters;
2) performing distribution calculation of the impulse voltage in the GIS according to a distribution parameter model, specifically in ATP software and other software, constructing a model to calculate, and calculating by the software;
3) calculating impulse voltage parameters of each interval of the GIS, constructing an equivalent model in ATP software and the like, calculating overvoltage, and determining the impulse voltage parameters of each interval, such as amplitude, waveform and the like, which are calculated in ATP software and the like according to the calculation result;
4) and determining the number of the segments according to the parameters, wherein the rule is that when the waveform is distorted after propagating for a certain length and does not meet the standard DLT 618-2011 gas-insulated metal enclosed switchgear field handover test procedure, the length is considered to need to be tested separately, and the length is separated according to the condition. Continuing to calculate and separating to know that the waveforms of all the sections meet the standard requirement;
5) and carrying out a segmented impact voltage withstand test on the GIS according to the number of segments, specifically, dividing the GIS into a plurality of segments according to the number of segments, and then carrying out the impact voltage withstand test on each segment.
The invention relates to a GIS (gas insulated switchgear) on-site impact voltage withstanding test method, which comprises the following steps: 1) obtaining equivalent parameters of each interval of the tested GIS, and constructing a GIS distribution parameter model; 2) performing distribution calculation of the impulse voltage in the GIS according to the distribution parameter model; 3) calculating impulse voltage parameters of each interval of the GIS; 4) determining the number of segments according to the parameters; 5) and carrying out a sectional impact voltage withstand test on the GIS according to the number of the sections. The method is characterized in that: the test method determines the waveform parameters of overvoltage born by each interval of the tested GIS through overvoltage calculation, and determines the number of segments according to the waveform parameters, thereby ensuring the test efficiency and the realization effect.
The specific implementation method of the invention comprises the steps of firstly obtaining distribution parameters of a tested GIS, namely equivalent capacitance to ground, equivalent inductance and equivalent resistance of unit length at each interval, and distributing a parameter circuit model according to structural members of the GIS; secondly, calculating the distribution characteristics of the impulse voltage according to the waveform injected into the tested GIS by the impulse voltage generator and the distribution parameter model of the tested GIS to obtain the impulse voltage waveform born by each interval; calculating waveform parameters of the impulse voltage waveform according to the impulse voltage waveform of each interval, and determining which interval waveform parameters meet requirements and which interval waveform parameters do not meet the requirements; the waveform parameter is determined according to the available national standard, IEC standard, enterprise standard and the like, and the method is not particularly limited; determining the number of segments according to the waveform parameters, wherein the determination principle is to ensure that the parameters of the impulse voltage waveform borne by any tested GIS interval meet the requirements; and carrying out a segmentation test on the tested GIS according to the determined segmentation condition.
FIG. 1 is a flow chart of the present invention, wherein step 1 is to obtain tested GIS interval parameters for constructing a GIS distributed parameter model; step 2, calculating overvoltage distribution, inputting a waveform injected into the GIS by the impulse voltage generator, and calculating the distribution condition of the impulse voltage in the whole GIS; step 3, calculating waveform parameters of the impulse voltage born by each interval, wherein the waveform parameters comprise wave head time, wave tail time and the like, and determining which intervals bear the waveform parameters which meet the requirements and which do not meet the requirements; and 4, determining the interval meeting the requirement as a test segment capable of being tested simultaneously according to the result of the step 3. And for the interval which does not meet the requirement, recalculating after removing the interval which meets the requirement, and further determining the section which can be tested. And determining the number of the segments after multiple calculations, and ensuring that the impulse voltage waveform born by any interval meets the requirement. And 5, performing an impact pressure resistance test after the number of the segments is obtained.
The present invention has been described in detail, and the principle and embodiments of the present invention are explained herein by using specific examples, which are only used to help understand the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
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| CN201811300411.7A CN109541406B (en) | 2018-11-02 | 2018-11-02 | GIS on-site impact voltage-withstanding test method |
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| CN109541406B true CN109541406B (en) | 2021-02-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0668207A (en) * | 1992-04-17 | 1994-03-11 | Internatl Business Mach Corp <Ibm> | Method for detecting nearest point on spline or polyline |
| CN103559406A (en) * | 2013-11-13 | 2014-02-05 | 国家电网公司 | Simulation system and method for withstand voltage test of extra-high voltage GIS |
| CN103675623A (en) * | 2013-12-07 | 2014-03-26 | 西安交通大学 | Method and system for detecting partial discharging of GIS under impulse voltage |
| CN104459490A (en) * | 2014-12-11 | 2015-03-25 | 广东电网有限责任公司电力科学研究院 | Ultrasonic wave analysis device and system for GIS breakdown positioning in electric system |
| CN106707114A (en) * | 2016-11-22 | 2017-05-24 | 华北电力大学 | Method and device for detecting operation states of GIS Intervals |
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2018
- 2018-11-02 CN CN201811300411.7A patent/CN109541406B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0668207A (en) * | 1992-04-17 | 1994-03-11 | Internatl Business Mach Corp <Ibm> | Method for detecting nearest point on spline or polyline |
| CN103559406A (en) * | 2013-11-13 | 2014-02-05 | 国家电网公司 | Simulation system and method for withstand voltage test of extra-high voltage GIS |
| CN103675623A (en) * | 2013-12-07 | 2014-03-26 | 西安交通大学 | Method and system for detecting partial discharging of GIS under impulse voltage |
| CN104459490A (en) * | 2014-12-11 | 2015-03-25 | 广东电网有限责任公司电力科学研究院 | Ultrasonic wave analysis device and system for GIS breakdown positioning in electric system |
| CN106707114A (en) * | 2016-11-22 | 2017-05-24 | 华北电力大学 | Method and device for detecting operation states of GIS Intervals |
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