SVG low voltage ride through characteristic test method

A low-voltage ride-through and testing method technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of low difficulty and low test cost, and achieve the effect of reducing cost and difficulty and improving test convenience

Pending Publication Date: 2022-03-18
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID QINGHAI ELECTRIC POWER COMPANY +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a test method for SVG low-voltage ride-through characteristics, so as to solve the problem of low test cost and low difficulty in the above-mentioned background technology.

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  • SVG low voltage ride through characteristic test method
  • SVG low voltage ride through characteristic test method
  • SVG low voltage ride through characteristic test method

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing and embodiment

[0020] As shown in the figure, a method for testing SVG low-voltage ride-through characteristics of the present invention is characterized in that the technical solution of the present invention is implemented in the following steps:

[0021] 1. Add the low-voltage ride-through simulation test function to the SVG converter control system: during the normal grid-connected operation of the SVG, V g_sim For the simulated voltage drop fault, the fault type is three-phase / two-phase fault, set the fault drop depth range, and set the fault time range; figure 2 As shown, I q Is the reactive current during the low wear period, and its calculation formula is I q =K×(0.9-V g_sim ), where the K factor can be set.

[0022] 2. Add low-voltage ride-through simulation test parameters to the SVG converter control system: the reactive current control coefficient KQ range c...

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Abstract

The invention relates to the technical field of electric energy control, in particular to a method for testing the low-voltage ride-through characteristic of an SVG (Static Var Generator). According to the technical scheme, the method comprises the following steps that firstly, a low-voltage ride-through simulation test function is added into an SVG converter control system; and 2, adding low-voltage ride-through simulation test parameters into the SVG converter control system. And 3, completing correctness test of test functions and test parameters on a test platform of an equipment manufacturer, wherein field test conditions are provided. And 4, after the converter control system is upgraded on the SVG site, testing is carried out, and data are recorded. And a fifth step of analyzing related active and reactive power control characteristics according to the active power and the reactive power which are obtained through actual measurement, and completing a test. The method has the advantages that the test cost is low, the test difficulty is small, field tests can be conveniently carried out, the converter control system is adopted for data recording, and the test convenience can be further improved.

Description

technical field [0001] The invention relates to the technical field of electric energy control, in particular to a method for measuring low-voltage ride-through characteristics of SVG. Background technique [0002] With the expansion and expansion of new energy power plants, the increase of grid load and the improvement of equipment manufacturers' technical strength, the requirements of low voltage ride through are gradually covered by reactive power compensation SVG equipment, which is required to provide reactive power support and support during grid faults. It has the function of low voltage ride through ability. The most important feature of SVG (Static Synchronous Generator) is its low-voltage ride-through control feature. Because this feature needs to cause a voltage drop, in the prior art, it is necessary to perform low-voltage drop control on the primary system (690V or 35kV). The voltage breakdown characteristic test uses the principle of impedance voltage division...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 陶向宇卢国强陈春萌赵东宁赵旭峰于大海宋锐甘嘉田王学斌傅国斌丁玉杰杨军肖明杨凯璇
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID QINGHAI ELECTRIC POWER COMPANY
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