Device and method for alternating cooling and heating of converter valve cooling system

Abstract

The invention discloses a cold and hot alternating test device and method for a converter valve cooling system and belongs to the field of a converter valve cooling system. The device includes a watersupply system, a main circulation system and an air compressor. The water supply system includes a hot water tank and a cold water tank which are connected in parallel. Water outlets of the hot watertank and the cold water tank are respectively connected to a water inlet of the main circulation system through a make-up pump and an electric valve. The main circulation system comprises a main circulation pump, a main filter, a third electric valve, a fourth electric valve and a degassing buffer tank which are sequentially connected by a pipeline. A converter valve to be tested is connected between a water outlet of the third electric valve and a water inlet of the fourth electric valve. An air inlet of the air compressor is connected to the water outlet of the third electric valve througha first electromagnetic valve and is connected to an air outlet of the degassing buffer tank through a first check valve. An outlet of the main filter is respectively connected to water inlets of thehot water tank and the cold water tank through an electric valve. The cold and hot alternating test device and method of the invention has the advantages of simple structure, high degree of automation, safety and reliability and high operation efficiency.

Description

technical field [0001] The invention relates to the field of converter valve cooling systems, in particular to a device and method for alternating cooling and heating of a converter valve cooling system. Background technique [0002] As the core equipment of UHV power transmission, UHV converter valve is the key unit of AC-DC power conversion. During the conversion of AC and DC power, the converter valve will generate a lot of heat due to its high working voltage level and high transmission power. Therefore, a closed pure water cooling system is required to dissipate heat for the converter valve. The radiator, water resistance and saturated reactor in the sub-valve module of the converter valve are connected in order by PVDF pipe fittings of a certain diameter. The radiator is taken outdoors to ensure that the valve module works at a suitable temperature. During the operation of the closed pure water cooling system of the converter valve, the leakage of the cooling medium...

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Problems solved by technology

[0003] In the prior art, the test platform for checking the cooling system of the converter valve needs to manually adjust the flow rate, pressure, temperature and other parameters of the cooling medium in the tested components. The number of components tested each time is small, the operation process is complicated, and disassembly is troublesome. , requires the cooperation of multiple people, the work efficiency is low, and some large-diameter pipelines cannot be factory-tested due to reasons such as operating capacity

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