One-button start-stop system and method for DCS control of large-scale condenser

Abstract

The invention belongs to the technical field of phase modifier unit thermal control, and particularly relates to a large phase modifier DCS control one-key start and shutdown system and method. The invention specifically relates to a large phase modifier automatic start and shutdown method. The system combines a phase modifier body, an auxiliary system and a phase modifier electrical system together through a DCS monitoring system, and mainly comprises a phase modifier body, an excitation system, a step-up transformer, a starting system, a cooling system, an oil system, a monitoring system, anelectrical system and a protection system. The DCS has a bidirectional redundant communication function with a third-party control system, reduces the operation and maintenance cost and improves theautomation level of the phase modifier. One-key start and shutdown of the phase modifier are realized, the labor intensity of operators can be effectively reduced, and the phase modifier is attended by a few persons or unattended. Coordination control of reactive power can be realized through interconnection with a converter station monitoring system, and safe, economic and high-quality running ofa power grid is ensured.

Description

technical field [0001] The invention belongs to the technical field of thermal control of a condenser unit, and in particular relates to a DCS control one-button start-stop system and method for a large condenser, in particular to a method for automatically starting and stopping a large condenser. Background technique [0002] Power grid operation experience shows that there is a coupling problem in the combined operation of the established ±500kV AC-DC UHV grid. When the DC system fails, it will generate a large instantaneous impact power on the AC system, which will cause voltage stability problems in the AC system. In order to realize long-distance and large-capacity UHV power transmission, a large amount of reactive power support is required during the long-distance and large-capacity power transmission of DC UHV, especially during the voltage fluctuation process caused by various disturbances. Support is more important. [0003] The condenser can quickly send or absorb...

AI Technical Summary

Problems solved by technology

[0004] According to the preliminary research on the relevant data of the condenser logic, the DCS system design of the existing domestic power plants cannot meet the requirements of the condenser unit, and rarely can meet the degree of no intervention by the operator after the one-button start and stop button. Point control method, the execution of each breakpoint needs human confirmation before it can start

However, the start-up, grid-connection and operation methods of the condenser are different from those of thermal power units and gas turbines, and there are no similar cases to provide reference

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