Synthesis loop for running test of converter valve for direct current power transmission project

Abstract

The invention discloses a synthesis loop for the running test of a converter valve for a direct current power transmission project. The loop comprises a high-voltage power distribution system, a current source subsystem, a voltages source subsystem, an impact test subsystem, a short-circuit test subsystem, an alternating current filtering subsystem, a control protection system and an auxiliary system, wherein the auxiliary system comprises a low-voltage power distribution system, a water cooling system and a test parameter measuring system. The subsystems are integrated into one loop through reasonable circuit design, so the subsystems can be matched with one another to perform the running test of the converter valve; the loop has a simple structure and runs stably; and due to the control protection system, the running safety of the whole synthesis loop can be ensured, the service life of equipment is prolonged and failure rate is reduced. The synthesis loop can meet the requirement of the running test of the converter valve for the direct current power transmission project of + / -800kV / 5000A and below; and tests prove that the synthesis loop can completely meet the requirement of all running test projects of a high-voltage direct current power transmission thyristor valve in the IEC60700-1:1998 / GB / T 20990.1-2007 standard.

Description

technical field [0001] The invention belongs to the technical field of power electronics and ultra-high voltage testing, and relates to a test synthesis circuit, in particular to a converter valve operation test synthesis circuit for ±800kV / 5000A and below direct current transmission projects. Background technique [0002] In the process of realizing the Party Central Committee's grand goal of quadrupling the national economy by 2020, our country is facing severe challenges such as insufficient power supply and increasing pressure on the ecological environment. For this reason, the State Grid Corporation of China has formulated the "UHV Power Grid Planning", and plans to accelerate the research and construction of million-volt AC and ±800kV DC UHV transmission technology to protect the stable and healthy development of the national economy. [0003] The development of UHV power transmission is a systematic project with huge capital investment and complicated technology. Bef...

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Problems solved by technology

In the field of UHV DC transmission technology, there is currently no unified standard for related equipment testing and product technical conditions in the world. At present, there is no public report of a similar UHV converter valve operation test synthesis circuit in China.

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