Integrated testing circuit for modular multi-level converter valve and control method of integrated testing circuit

A modular multi-level, test circuit technology, applied in the direction of converting AC power input to DC power output, measuring electricity, electrical components, etc., can solve problems such as blanks, reduce active power loss, and ensure safety and reliability.

Active Publication Date: 2012-06-27
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the test method and test device of mo

Method used

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  • Integrated testing circuit for modular multi-level converter valve and control method of integrated testing circuit
  • Integrated testing circuit for modular multi-level converter valve and control method of integrated testing circuit
  • Integrated testing circuit for modular multi-level converter valve and control method of integrated testing circuit

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Embodiment Construction

[0039] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0040] like image 3 As shown, the integrated test current of this embodiment includes three parts: the main circuit, the sample valve and the control and protection circuit. The control and protection circuit controls the main circuit and the sample valve, and carries out the charging of the sample valve and the load test.

[0041] The main circuit includes voltage regulating circuit, single-phase AC test circuit, DC test circuit, load and switch K 1 -K 4 ; The single-phase AC test circuit and the DC test circuit are connected in parallel and then connected in series with the voltage regulation circuit; a switch K is set on the branch between the single-phase AC test circuit and the voltage regulation circuit 1 ; Set the switch K on the branch between the DC test circuit and the voltage regulation circuit 2 . Both ...

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Abstract

The invention relates to an integrated testing circuit for a modular multi-level converter valve and a control method of the integrated testing circuit. The integrated testing circuit comprises a main circuit, a test valve and a control protection circuit, wherein the control protection circuit controls the main circuit and the test valve and performs test valve charging and on-load tests. The normal operation of the converter valve is detected and guaranteed, and when the converter valve is subjected to misoperation, an error prompt is provided through a voltage signal. Voltage-regulating, alternating current and direct current testing circuits of the converter valve are effectively integrated, and testing voltage and current adjustable converter valve charging and on-load tests are finished. The operating states of components in a positive and reverse charging circuit of the converter valve are comprehensively checked through alternating current charging, and the safety and reliability of follow-up tests are ensured. Moreover, high current is generated by utilizing reactive energy exchange, and the active loss of the testing circuits and the capacity of a testing input power supply are reduced.

Description

Technical field: [0001] The invention relates to the field of power electronics, in particular to an integrated test circuit of a modular multilevel converter valve and a control method thereof. Background technique: [0002] Modular multi-level converter valves are increasingly being used in high-voltage and large-capacity applications such as high-voltage direct current transmission (HVDC) and flexible alternating current transmission (FACTS). They must undergo factory tests and type tests in accordance with relevant IEC standards and actual operating conditions. To test its design and production. At present, the test method and test device of modular multilevel converter valve are still blank. [0003] The modular multilevel converter valve adopts the power module PM cascading method to increase the voltage and capacity level of the converter valve, such as figure 1 shown. A power module usually consists of four parts (see figure 2 ): (1) A half-bridge structure powe...

Claims

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Application Information

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IPC IPC(8): G01R31/00
CPCH02M2007/4835H02M7/4835
Inventor 易荣汤广福姬大潜吕铮冯静波
Owner CHINA ELECTRIC POWER RES INST
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