Test system and test method of general converter product

Abstract

The invention discloses a test system and a test method of a general converter product. The test system comprises a test main circuit unit, a signal transmission unit and an upper computer unit, wherein the upper computer unit comprises a programmable logic controller and a touch screen, the test main circuit unit adopts a back-to-back structure, the test system has generality, is based on fully-controlled power electronic devices and energy bidirectional flow and can be used as the general test systems of an offshore wind power flexible direct current transmission converter, a static var generator, a four-quadrant frequency control device, an active power filter, a new-energy synchronization device, etc., the speed of research and development of the converter product is speeded up, the development period is shortened, the cost is saved, the function switching of the tested converter product can be realized by the programmable logic controller and the touch screen, the operation is convenient, and the human-computer interface is friendly.

Description

technical field [0001] The invention relates to the field of testing power electronic converters, in particular to a testing system and method for general converter products. Background technique [0002] With the continuous development of power electronics, the application range of converter technology based on fully controlled power electronic devices such as insulated gate bipolar transistors (IGBTs) continues to expand. It is mainly used in motor drives, reactive power compensation, active power filtering, In the field of new energy grid connection and offshore wind power flexible DC transmission, although the control algorithms are almost completely different in the above-mentioned applications, the circuit structure is not much different. Most of the applications are based on the three-phase bridge structure, including detection and protection. , drive and other parts. [0003] After searching the prior art, it was found that "Implementation and Control of Distributed...

AI Technical Summary

Problems solved by technology

[0004] 1) The design scheme of the test system is only aimed at a single control target and system design, which lacks versatility and cannot cover the development of various converter products;

[0005] 2) The main circuit part of the test system adopts star connection, and there is no common DC side, which brings certain difficulties to active power transmission;

[0006] 3) The test system is only designed for its trigger algorithm verification, and its capacity is small, which makes it difficult to transform the test system into an actual product;

[0007] 4) The main circuit is a cascaded multi-level structure, which is suitable for high-voltage and high-power system design. For small and medium power systems, the structure is too complicated and the system cost is too high

[0008] The main circuit topology of the experimental system is too complex, not suitable for use in small and medium power systems, lacks versatility, and cannot be used as a general platform for the design, development and performance testing of various converter products

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