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High-voltage DC transmission valve cold main circulation pump power frequency control circuit

A high-voltage direct current and control loop technology, which is applied in pump control, liquid variable displacement machinery, machine/engine, etc., can solve problems such as main circulation pump outage, and achieve improved reliability, improved safety, and high economy Effect

Active Publication Date: 2017-05-17
GUANGZHOU GOALAND ENERGY CONSERVATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, provide a high-voltage direct current transmission valve cold main circulation pump power frequency control circuit, and solve the problem of main circulation pump outage when dual CPUs fail

Method used

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  • High-voltage DC transmission valve cold main circulation pump power frequency control circuit

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Embodiment Construction

[0020] An embodiment of the present invention will be described in further detail below in conjunction with an embodiment and accompanying drawings, but the embodiment of the present invention is not limited thereto.

[0021] Such as figure 1 As shown, the power frequency control circuit of the high-voltage direct current transmission valve cold main circulation pump includes a parallel main pump power frequency operation control circuit, a main pump operation locking circuit, and a double CPU fault forced-throw locking pump circuit.

[0022] The power frequency operation control loop of the main pump includes the QF1G circuit breaker normally open auxiliary contact 21-24, the K11 relay normally open contact 11-14, the KA1C relay first normally open contact 11-14 and the KM1G main pump contact in series. The device coil also includes the first normally open contact 11‐14 of the KA1C relay, the first normally open contact 11‐14 of the KA1D relay and the normally open contact 11...

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Abstract

The invention discloses a power frequency control loop of a high-voltage direct current transmission valve cooling main circulating pump. The power frequency control loop of the high-voltage direct current transmission valve cooling main circulating pump comprises a main pump power frequency operation control loop, a main pump operation locking loop and a double-CPU fault forced-casting pump locking loop which are connected in parallel. When double-CPU faults happen, the main circulating pump does not stop, and the problems that when double-CPU faults happen, the main circulating pump stops, and a converter valve trips out are well solved.

Description

technical field [0001] The invention relates to a control and protection device for a main circulation pump of a high-voltage direct current transmission converter valve cooling system, in particular to a power frequency control circuit of the main circulation pump. Background technique [0002] The main circulation pump of the traditional converter valve cooling system is controlled by CPU. In order to enhance its reliability, dual CPU control is adopted. When one CPU fails, it will automatically switch to the other CPU to run, and the main circulation pump will continue to run. When two CPUs fail, the main circulation pump stops running, causing the converter valve to stop working. Therefore, it is necessary to develop a power frequency control circuit for the cold main circulation pump of the HVDC transmission valve so that the main circulation pump does not stop when the dual CPU fails, so as to meet the requirements of the cold main circulation pump of the HVDC transmis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/06
Inventor 冷明全谢元龙丘淼生
Owner GUANGZHOU GOALAND ENERGY CONSERVATION TECH
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