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System for testing low-voltage ride-through function of high-voltage SVG

A low-voltage ride-through and test system technology, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problem of no SVG low-voltage ride-through capability, achieve unbalanced voltage sag, meet test requirements, and be easy to operate. simple effect

Pending Publication Date: 2018-05-18
XINFENGGUANG ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for SVG devices, there is no test system for testing and verifying the ability of SVG low voltage ride through

Method used

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  • System for testing low-voltage ride-through function of high-voltage SVG
  • System for testing low-voltage ride-through function of high-voltage SVG

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Experimental program
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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0014] Such as figure 1 As shown, the circuit schematic diagram of the test system of the high-voltage SVG low voltage ride-through function of the present invention is provided, figure 2 A schematic diagram of the control of the power module by the man-machine interface in the present invention is given. The test system for the high-voltage SVG low voltage ride-through function shown consists of the man-machine interface 4, the main controller 5, the phase-shifting transformer 1, the power module 2 and the standby The test reactive power compensator SVG (3) is composed, and the human-machine interface 4 provides the human-computer interaction function. For example, the tester can input the desired simulated low-voltage value or low-voltage form through the human-machine interface 4 . The man-machine interface 4 communicates with the main controller 5...

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Abstract

The invention provides a system for testing the low-voltage ride-through function of a high-voltage SVG. The system comprises a human-computer interface, a main controller, a phase-shifting transformer, power modules and the static var generator (SVG), and the primary side of the phase-shifting transformer is connected to a high-voltage power transmission line. The system is characterized in thatN taps are arranged on each phase of the secondary side of the phase-shifting transformer, and each tap is connected with one power module; one end obtained after all the power modules on the same phase are connected in series is connected with the static var generator (SVG), and the other end and one end obtained after the power modules on the other two phases are connected in series are connected to form planetary connection. The system for testing the low-voltage ride-through function of the high-voltage SVG can achieve single-phase or two-phase or third-phase balance type voltage drop change and simulate drop faults of short circuits to the ground, the voltage value for testing the low-voltage ride-through property of the SVG can be set through the human-computer interface, operation is convenient and easy, and only a small-capacity power grid needs to be used.

Description

technical field [0001] The present invention relates to a test system for the low voltage ride-through function of a high-voltage SVG, and more specifically, to a test system for the low-voltage ride-through function of a high-voltage SVG capable of simulating a single-phase, two-phase or three-phase ground short-circuit voltage drop. Background technique [0002] At present, a large number of dynamic reactive power compensation devices are used in the field of new energy technology (such as photovoltaic power generation and wind power generation), such as reactive power compensator SVG. According to relevant national standards, new energy power stations involving photovoltaic power generation and wind power generation must have low Voltage ride through capability. [0003] There is a test method for the low voltage ride-through test of wind farms and photovoltaic power stations. By measuring the grid-connected three-phase voltage and current of wind farms and photovoltaic p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 苏刘军任其广裴宝峰李志刚陈早军
Owner XINFENGGUANG ELECTRONICS TECH CO LTD
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