Motor thermosensitive control system of high-voltage direct-current valve cooling system

Abstract

The invention discloses a motor thermosensitive control system of a high-voltage direct-current valve cooling system. The motor thermosensitive control system comprises thermosensitive control branches installed on a main circulating water pump and a standby main circulating water pump, thermosensitive control branches installed on six spraying water pumps and thermosensitive control branches installed on six draught fans. The thermosensitive control branch installed on the main circulating water pump, the thermosensitive control branches installed on the first spraying water pump, the fourthspraying water pump and the sixth spraying water pump and the thermosensitive control branches installed on the first draught fan, the third draught fan and the fifth draught fan are connected in parallel to form a first monitoring branch, and the thermosensitive control branch installed on the standby main circulating water pump, the thermosensitive control branches installed on the second spraying water pump, the third spraying water pump and the fifth spraying water pump and the thermosensitive control branches installed on the second fan, the fourth fan and the sixth fan are connected in parallel to form a second monitoring branch. The motor thermosensitive control system has the beneficial effects that the valve cooling system motor monitoring is achieved, and the reliability of the valve cooling system is enhanced.

Description

technical field [0001] The invention relates to the field of high-voltage direct current grid equipment, in particular to a motor thermal control system of a high-voltage direct current valve cooling system. Background technique [0002] The valve cooling system is a very important auxiliary system in the DC transmission project. It provides cooling water for the thyristor valve and absorbs the heat emitted by the converter valve in operation to maintain the normal operating temperature of the converter valve and ensure controllability. Silicon valves operate reliably. [0003] Such as figure 1 As shown, the cooling system of the valve is composed of the cooling system inside the valve and the cooling system outside the valve. The heat is taken away, and the hot water that comes out is pressed by the main circulation pump and then flows through the external cooling tower for cooling and recycling, realizing the function of continuous cooling. The external cooling system i...

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Problems solved by technology

[0004] In view of the above problems, the present invention proposes a motor heat-sensitive control system of a high-voltage DC valve cooling system. By installing a heat-sensitive control branch in the motors of water pumps and fans, and dividing the heat-sensitive control branch into two parts, the main solution is to The problem of insufficient system reliability caused by the lack of monitoring means for the motor of the existing valve cooling system

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