A flexible DC power transmission converter valve water-cooling system for islands

A flexible DC power transmission and water-cooling system technology, applied in output power conversion devices, electrical components, cooling/ventilation/heating renovation, etc. The valve temperature is stable and the effect of ensuring stable operation

Inactive Publication Date: 2014-04-23
GUANGZHOU GOALAND ENERGY CONSERVATION TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the special environment of the island, special requirements are put forward for the corrosion resistance of related equipment. The existing valve cooling...

Method used

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  • A flexible DC power transmission converter valve water-cooling system for islands

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Embodiment 1

[0020] Such as figure 1 As shown, the flexible HVDC converter valve water cooling system includes main circulation water pumps 1-1 and 1-2 connected by pipelines to form a main circulation loop, air cooler 2, main filters 3-1 and 3-2, and converter valves 4 and a degassing tank 5, the degassing tank 5 has a built-in electric heater 51, and the main circulating water pump and the main filter are all provided with standby;

[0021] The main circulation circuit is also connected in parallel with a water treatment circuit, and the water treatment circuit includes ion exchangers 6-1 and 6-2 connected by pipelines, precision filters 7-1 and 7-2, buffer tanks 8-1 and 8-2; the ion exchanger, precision filter and buffer tank are all used for equipment; the outlet of the ion exchanger 6-1 is provided with a deionized water conductivity transmitter 9-1, and the ion exchanger 6-2 The outlet is provided with a deionized water conductivity transmitter 9-2. Impurities in cooling water are ...

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Abstract

The invention provides a flexible DC power transmission converter valve water-cooling system for islands. The water-cooling system comprises main circulation water pumps, an air cooler, main filters, a converter valve and a degassing tank which are in pipeline connection to form a main circulation loop. The main circulation loop is connected in parallel with a water treatment loop. Buffer tanks are connected with a nitrogen pressure stabilizing system. An Ion exchange is connected with a water-supplementing system. The heat exchange tube bundle of the air cooler is made of stainless steel 316L material. Fins utilize epoxy resin coating aluminium sheets. An internal framework employs stainless steel 316Ti material and the external surface of the internal framework is sprayed with powder. The flexible DC power transmission converter valve water-cooling system effectively cools the converter valve, constant-flow cooling water is guaranteed to go into the converter valve, and valve-going temperature is stable without sudden rising and dropping. The flexible DC power transmission converter valve water-cooling system can change the water cooling heat dissipation capacity based on the change of IGBT thermal loads so as to control the valve-going temperature to be stale in a certain range, and guarantee the converter valve to operate stably.

Description

technical field [0001] The invention relates to a cooling system, which is used for cooling an IGBT heating element in a flexible direct current transmission converter valve. Background technique [0002] Guangdong Nan'ao large-scale wind power flexible DC transmission demonstration project is the first in China to adopt multi-terminal flexible DC technology. Modulation (PWM) technology-based new DC transmission technology, compared with traditional DC transmission technology, has flexible and convenient control, improves system stability, increases system dynamic reactive power reserve, improves power quality, saves construction land, and is convenient for installation, commissioning and maintenance It has broad application prospects in island power supply, urban power grid power supply, and renewable resource grid connection. [0003] As an important means of power supply for islands, the flexible DC transmission method is not limited by the transmission distance, and is ...

Claims

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Application Information

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IPC IPC(8): H02M1/00H05K7/20
Inventor 冷明全王婵
Owner GUANGZHOU GOALAND ENERGY CONSERVATION TECH
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