Control system of pure water cooling device of high voltage direct current (HVDC) transmission converter valve

A high-voltage direct current transmission and control system technology, applied in control/regulation systems, non-electric variable control, temperature control without auxiliary power supply, etc. The effect of preventing damage, ensuring reliability, and reducing the scope of accidents

Active Publication Date: 2010-01-27
GUANGZHOU GOALAND ENERGY CONSERVATION TECH
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AI Technical Summary

Problems solved by technology

However, because of the natural "bundling" between the two networks after networking, the AC synchronization range is extended. When one of the grids fails, it will affect multiple interconnected grids, which will expand the consequences of the failure, reduce the power quality, and easily cause contact. Large fluctuations in line power, or even shock to the weak link of the system, thereb

Method used

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  • Control system of pure water cooling device of high voltage direct current (HVDC) transmission converter valve
  • Control system of pure water cooling device of high voltage direct current (HVDC) transmission converter valve
  • Control system of pure water cooling device of high voltage direct current (HVDC) transmission converter valve

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Embodiment Construction

[0082] refer to figure 1 , the existing closed circulating pure water cooling device mainly includes a main circulating cooling circuit, a secondary circulating water treatment circuit connected in parallel with the main circulating cooling circuit, a nitrogen voltage stabilizer circuit connected in series with the secondary circulating water treatment circuit, and a #1 electric tee The valve, #2 electric three-way valve is connected with the external circulation cooling circuit in parallel with the main circulation cooling circuit and the control system responsible for controlling the entire cooling device, and the auxiliary circulation water treatment circuit is connected with a water replenishment system.

[0083] The equipment in the main circulation cooling circuit flowing through the valve hall mainly includes the 1# main circulation pump and the #2 main circulation pump, which are standby for each other. It flows through the thyristor valve body to bring out the heat, a...

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Abstract

The invention discloses a control system of a pure water cooling device of a high voltage direct current (HVDC) transmission converter valve, comprising two independent subsystems, wherein, each subsystem comprises a programmable logic controller (PLC), an input/output module, a sampling measurement system, a synchronization module, a human-machine interface system and a power supply system; the PLCs of the two subsystems can realize non-disturbance switching between the two PLCs and seamless exchange of information of each sub-control system through synchronous optical connection; the control system can monitor each online physical quantity in real time, and accurately control actions of machinery and electrical equipment of the whole valve cooling system in accordance with specific changes of the physical quantities, maximally ensure the reliability of the HVDC valve cooling system by a stable hot backup control subsystem, a control element and control programs, fully narrow the scope of accident, and prevent thyristor valve groups from being damaged due to the failure of the valve cooling system, thereby maintaining the safe, stable and reliable running of the thyristor valve groups.

Description

technical field [0001] The invention relates to a direct current transmission and distribution system, in particular to a direct current power system and a control system of a closed circulating pure water cooling device of a thyristor valve group in a power electronic device. Background technique [0002] The traditional power grid is connected by AC, which has the advantages of simple implementation, low investment, natural emergency emergency support for the other side of the grid when power is missing from one side of the grid, and quick response. However, it is precisely because of the natural "bundling" between the two networks after networking that the AC synchronization range is extended. When one of the power grids fails, it will affect multiple interconnected power grids, expand the consequences of the failure, reduce power quality, and easily cause contact The line power fluctuates greatly, even to the point of oscillating to break the weak links of the system, th...

Claims

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Application Information

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IPC IPC(8): G05D23/20G05D23/01
Inventor 崔鹏飞吴建超吴文伟
Owner GUANGZHOU GOALAND ENERGY CONSERVATION TECH
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