A measurement performance verification device of a large-scale ground grid grounding resistance tester
A grounding resistance and calibration device technology, applied in measuring devices, measuring electrical variables, instruments, etc., can solve the problem of inconsistent test conditions, large differences in test values, and incompatibility of auxiliary grounding resistance values with large-scale grounding grid grounding resistance testers Work requirements and other issues to achieve the effect of perfect performance evaluation
A grounding resistance and calibration device technology, applied in measuring devices, measuring electrical variables, instruments, etc., can solve the problem of inconsistent test conditions, large differences in test values, and incompatibility of auxiliary grounding resistance values with large-scale grounding grid grounding resistance testers Work requirements and other issues to achieve the effect of perfect performance evaluation
CN104360296BInactive Publication Date: 2017-10-10STATE GRID CORP OF CHINA +3
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[0029] The metering performance verification device of the large-scale ground grid grounding resistance tester proposed by the present invention, its wiring schematic diagram is as follows figure 2 shown. The measurement performance verification device includes a single-phase auto-coupling voltage regulator T 1 , the first isolation transformer T 2 , the second isolation transformer T 3 , AC ammeter A1, AC voltmeter V1, variable standard resistor R E , inductance L E , variable voltage pole auxiliary grounding resistance R P1 , variable current pole auxiliary grounding resistance R C1 , coupling capacitance C CP , line resistance R C线 , the first voltage test hole P 1 , the first current test hole C 1 , the second voltage test hole P 2 , the second current test hole C 2 ; The second current test hole C 2 Connected to the left side of the AC ammeter A1; the AC ammeter A1 with the variable standard resistor R E and inductance L E in series; the single-phase autovo...
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The invention relates to a metering performance verification device of a large-scale grounding resistance tester, and belongs to the technical field of large-scale grounding resistance testing. The calibration device of the present invention, the measurement performance of the large-scale grounding resistance tester includes: indication error, the influence of auxiliary grounding resistance on indication error, the influence of ground voltage on indication error, and the influence of ground grid self-inductance on indication error Influence and influence of crosstalk between test lines on indication error. The verification device of the present invention can quantitatively evaluate the anti-interference ability of the large-scale grounding resistance tester, and adds the influence of the two factors of grounding self-inductance and crosstalk between test lines, so that the large-scale grounding resistance tester can Testing in an environment that simulates real working conditions ensures the effectiveness of performance evaluation of large-scale ground grid testers.
Description
technical field [0001] The invention relates to a measurement performance verification device of a large-scale grounding resistance tester, and belongs to the technical field of large-scale grounding resistance testing. Background technique [0002] The grounding resistance of the ground grid is an important basis for ground grid design, construction acceptance, operation and maintenance, and an important indicator to ensure the safe operation of power generation, transformation, distribution, and power consumption systems. According to DL / T 475-2006 Electric Power Industry Standard of the People's Republic of China: Guidelines for Measurement of Grounding Device Characteristic Parameters, grounding devices can be divided into two categories: general grounding devices and large-scale grounding devices. Among them, large-scale grounding devices refer to "substations with a voltage level of 110kV and above, thermal power plants and hydropower plants with an installed capacity ...
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Patent Timeline
10 Oct 2017
Publication
CN104360296B
- IPC
- G01R35/00
- Inventors
- 端木林楠; 胡晓晖