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Thermal power generating unit high-pressure bypass control system transformation method

A high-voltage bypass and control system technology, which is applied in the general control system, control/regulation system, electrical program control, etc., can solve the problems of easy failure of the control panel and easy jitter of the analog signal, and is conducive to safe operation. , easy accident analysis, convenient logic configuration

Active Publication Date: 2020-09-11
INNER MONGOLIA MENGDA POWER GENERATION CO LTD +3
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Problems solved by technology

[0003] The present invention is to solve the problem that the control panel is prone to failure and the analog signal is prone to jitter in the CCI-AV6+ control system used in the high-voltage bypass of the existing thermal power plant, and now provides a method for transforming the high-voltage bypass control system of the thermal power unit

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  • Thermal power generating unit high-pressure bypass control system transformation method

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specific Embodiment approach 1

[0024] Specific implementation mode one: refer to figure 1 Specifically explain this embodiment, a method for transforming a thermal power unit high-voltage bypass control system described in this embodiment, the method is:

[0025] 1. Connect the positioner PVR10-10 in the high-voltage bypass CCI-AV6+ control system to the DCS (distributed control system) with hard wiring, so that the analog signal in the high-voltage bypass CCI-AV6+ control system passes through the signal isolator and then input to the DCS to eliminate the influence of interference on the analog quantity; the switching signal in the high-voltage bypass control system is input to the DCS after passing through the isolation relay to prevent the voltage fluctuation from burning out the DCS channel.

[0026] The above analog signal includes the analog command signal and analog feedback signal of the pressure reducing valve and temperature reducing valve in the high pressure bypass control system; the switching ...

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Abstract

The invention discloses a thermal power generating unit high-pressure bypass control system transformation method and relates to the technical field of thermal power plant high-pressure bypass control. The invention aims to solve the problems that a control screen of a CCI-AV6 + control system used by a high-voltage bypass of an existing thermal power plant is prone to failure, and an analog quantity signal is prone to jittering. According to the invention, a CCI-AV6 + control system is transplanted to a DCS system for centralized control, and reliability design and high-side temperature control strategy optimization design are carried out on main analog quantity signals.

Description

technical field [0001] The invention belongs to the technical field of high-voltage bypass control in thermal power plants, and in particular relates to a control method for a unit system. Background technique [0002] The high-pressure bypass system of some existing power plants adopts the CCI-AV6+ control system, and the pressure control part and temperature control part of the system are all concentrated in the PLC. The PLC and CCI’s PVR10-10 positioner are connected by hard wiring. As the service life increases, the control panel of the PLC and CCI system is prone to failure, and the analog signal jitters many times, causing the system to fail to work normally and affecting the unit. safe and stable operation. Contents of the invention [0003] The present invention aims to solve the problem that the control panel of the existing CCI-AV6+ control system used in the high-voltage bypass of the thermal power plant is prone to failure and the analog signal is prone to jit...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCG05B19/41875G05B2219/33273Y02P90/02
Inventor 孙建国姚坤马志国刘东旭李越男张磊张剑峰马全乐戴云飞吕登龙郭峃峄方敏付俊丰万杰
Owner INNER MONGOLIA MENGDA POWER GENERATION CO LTD