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Detection method for modular multi-level converter (MMC) steady state operation tester

A detection method and a technology of a test device, which are applied in the field of power systems, can solve problems such as damage to voltage capacity devices and endanger the safe operation of the power grid, and achieve the effect of complete functions and guaranteed safety

Active Publication Date: 2012-09-12
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the MMC valve is put into use without testing, the entire device may be damaged due to insufficient current and voltage capacity or damage to the auxiliary circuit, endangering the safe operation of the entire power grid

Method used

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  • Detection method for modular multi-level converter (MMC) steady state operation tester
  • Detection method for modular multi-level converter (MMC) steady state operation tester

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Embodiment Construction

[0036] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0037] The electrical topology diagram of the MMC valve steady-state operation test device of the present embodiment is as follows figure 2 As shown, the test device includes valve assembly 1, valve assembly 2, charging power supply E1, energy supplementary power supply E2, load reactor L, charging current limiting resistor R, control system, measurement and acquisition chassis; valve assembly 1 and valve assembly 2 are connected in series The load reactor L and the charging current-limiting resistor R are connected; the charging power supply E1 and the supplementary power supply E2 are respectively connected to the valve assembly 1; the valve assembly 1 and the valve assembly 2 are respectively connected to the control system; the valve assemblies 1 and 2 respectively contain n and m sub-modules, and n≥m; the sub-modul...

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Abstract

The invention relates to a detection method for a modular multi-level converter (MMC) steady state operation tester. The tester comprises a valve component 1, a valve component 2, a charging source E1, an energy complementing source E2, a load reactor L, a charging current-limiting resistor R, a control system, and a measurement and acquisition cabinet, wherein the valve component 1 and the valve component 2 are connected with the charging current-limiting resistor R through the serially connected load reactor L; the charging source E1 and the energy complementing source E2 are connected with the valve component 1; and the valve component 1 and the valve component 2 are connected with the control system. The method comprises the following steps: (1) detecting a cooling circuit; (2) detecting the isolation of a valve tower; (3) detecting average pressure tests; (4) detecting communication; (5) detecting control; and (6) performing a system test. By the method, whether the functions of the MMC steady state operation tester are complete and perfect can be detected, and equipment safety can be ensured in the debugging process.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a detection method for a steady-state operation test device of an MMC valve. Background technique [0002] Flexible direct current transmission (VSC-HVDC) technology has broad application prospects in the field of high-voltage direct current transmission. VSC-HVDC based on modular multilevel converter (MMC) is a way to realize direct current transmission using IGBT valves , and its core component is called MMC valve. [0003] The purpose of the steady-state operation test of the MMC valve is to investigate the tolerance of the valve assembly to key stresses such as current, voltage and heat under long-term actual operating conditions, which is also an important part of the research on the reliability of the converter operation. The steady-state operation test device can generate voltage, current and thermal stress equivalent to the actual working conditions, and these stresses are g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCH02M7/4835
Inventor 吴亚楠查鲲鹏高冲周竞之
Owner STATE GRID CORP OF CHINA
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