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Full-power test apparatus and control method of STATCOM submodules

A technology for testing devices and control methods, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., and can solve problems such as difficult control, unstable DC side voltage, and inequalities

Inactive Publication Date: 2015-10-28
郭高朋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional STATCOM sub-module testing methods are as follows: figure 1 As shown, it is composed of a voltage regulator, a step-up transformer, a diode rectifier circuit, a module under test and a reactor. The disadvantages of this test circuit are: 1. By adjusting the modulation amplitude of the module under test to adjust the Therefore, during the test, the output voltage of the module under test is generally not equal to the output voltage during actual operation; 2. Adjust the DC side capacitor voltage of the module under test by adjusting the contacts of the voltage regulator. The output voltage of the DC side of the diode rectifier circuit is different under the condition of light load and heavy load. Therefore, the voltage of the DC side of the module under test is unstable and difficult to control; 3. This test circuit can only test one sub-module at a time, and the module test takes a long time

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  • Full-power test apparatus and control method of STATCOM submodules
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  • Full-power test apparatus and control method of STATCOM submodules

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Embodiment Construction

[0056] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0057] 1, a kind of full-power test device and control method of STATCOM submodule, it is characterized in that: main circuit comprises energy supplementary circuit, main module, N tested modules and reactor (L 2 )constitute.

[0058] The function of the main module is to supplement energy for the full-power test device of the STATCOM sub-module and to control the current in the test loop.

[0059] The DC side output of the energy supplement circuit is connected to the DC side of the main module.

[0060] The AC side of the main module, the AC sides of the N tested modules and the reactor (L 2 ) connected in series.

[0061] A bypass switch (S 2 ), one end of the charging circuit is connected to the midpoint of the N tested sub-modules, and the other end is connected to the AC output of the main module.

[0062] The energy sup...

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Abstract

The invention relates to a structure and control method of an electrical and electronic apparatus, and specifically relates to a full-power test apparatus and control method of STATCOM submodules. The apparatus and method comprise three parts in terms of content: the structure of the test apparatus, a control algorithm and experiment operation steps. According to the control algorithm provided by the invention, modulation waves of a tested module are composed of three components, i.e., common-mode modulation waves, differential mode modulation waves and voltage stabilizing modulation waves for respectively realizing different control functions so that the test working condition of the module is closer to an actual running working condition; and the test apparatus provided by the invention can test the plurality of sub modules at the same time, substantially reduces the test time of the module, and decreases the test and labor cost.

Description

technical field [0001] The invention relates to a structure and a control method of a power electronic device, in particular to a full-power test device and a control method of a STATCOM sub-module. Background technique [0002] Compared with traditional TCR-type SVC, STATCOM has faster adjustment speed and better stability. Therefore, STATCOM is more and more widely used in wind farms, solar power stations and steel plants, and is gradually replacing TCR-type SVC. , with the intensification of competition in the STATCOM market and the development of technology, its cost is getting lower and lower, and its capacity is getting bigger and bigger. In the near future, STATCOM will occupy the main role of reactive power compensation in distribution network. [0003] The traditional STATCOM sub-module testing methods are as follows: figure 1 As shown, it is composed of a voltage regulator, a step-up transformer, a diode rectifier circuit, a module under test and a reactor. The d...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 郭高朋
Owner 郭高朋