A flexible DC converter valve cooling system suitable for offshore platforms

Abstract

The invention discloses a flexible DC converter valve cooling system suitable for offshore platforms, and belongs to the technical field of converter valve cooling. The system of the present invention uses sea water to cool down the cooling water when the ambient temperature is low, and keeps the cooling water in the water storage branch at a relatively low temperature. The main circulation circuit and the water storage branch use the lower temperature stored water in the water storage branch to further reduce the temperature of the cooling water to meet the water temperature requirements of the diverter valve and ensure the safe and stable operation of the diverter valve. There is a problem that seawater cannot be reasonably used to cool down the converter valve in the technology. The system of the present invention uses fresh water as the cooling medium, and the whole system is a fully closed circuit, and seawater is used to further cool down the cooling water, which improves the cooling capacity of the system and does not need to add complicated seawater treatment links. strong ability.

Description

technical field [0001] The invention belongs to the technical field of converter valve cooling, and more particularly relates to a flexible DC converter valve cooling system suitable for offshore platforms. Background technique [0002] Offshore wind power has the characteristics of abundant resources, high utilization hours of power generation, no land occupation and suitable for large-scale development. my country is a large oceanic country with more than 3 million square kilometers of sea area and 18,000 kilometers of coastline. With the development of deep-sea wind power technology, more offshore wind energy resources will be available. According to the national "Twelfth Five-Year" energy development plan and the special plan for renewable energy, the development goal of offshore wind power is to build 30GW in 2020. Flexible DC transmission has obvious advantages in the connection of offshore wind farms due to its advantages of small footprint, compact structure, modul...

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Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a flexible DC converter valve cooling system suitable for offshore platforms, the purpose of which is to use seawater to cool down the cooling water and maintain water storage The cooling water in the branch circuit is at a relatively low temperature. When the temperature of the cooling water in the main circulation circuit cannot meet the water temperature requirements of the diverter valve, the main circulation circuit and the water storage branch circuit are connected to utilize the lower temperature savings in the water storage branch circuit. The water further reduces the temperature of the cooling water to meet the temperature requirements of the diverter valve inlet water and ensure the safe and stable operation of the diverter valve, thereby solving the problem of not using seawater as a cooling medium in the existing offshore platform technology, or using seawater as a cooling medium However, the seawater treatment equipment is too complicated

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