Energy-balance-based coordination control method of integrated gasification combined cycle power station

Abstract

The invention provides a coordination control method of an integrated gasification combined cycle power station and particularly provides an energy-balance based coordination control method, aiming at the characteristic that time constant difference among all equipment of a controlled object of the integrated gasification combined cycle power station is large. According to the method, field signals are acquired, a gasification furnace and a gas turbine are regulated in the way of calculating the gasification furnace heat signal and the gas turbine heat signal, so the decoupling control on a power island and a gasification island is realized, gas turbine power and gas pressure before valve regulation are synchronously controlled, so that the heat signal tracks the energy signal, and thus the coordination control of the integrated gasification combined cycle power station is realized. Through control system architecture design and parameter regulation, in use, the method can effectively coordinate the operation of all the equipment of the gasification furnace and the power island of the power station, the load of the power station can be quickly and automatically regulated, and the operation stability of the power station can be ensured; and the method is a coordination control of a gas-steam combined cycle power station and has good stability and varying load performance.

Description

technical field [0001] The invention belongs to the technical field of equipment control, in particular to a coordinated control method for an integrated coal gasification combined cycle power station. Background technique [0002] Integrated coal gasification combined cycle power generation technology is a new type of power generation technology combining coal gasification technology and gas-steam combined cycle technology. Compared with conventional coal-fired power generation units, it has the advantages of less pollutant emissions and high efficiency, and has broad application prospects. Clean coal power generation technology. [0003] The integrated coal gasification combined cycle power generation technology includes the coal gasification process and the gas-steam combined cycle process. The entire power station involves a large number of equipment, and the process involves a variety of very complex physical and chemical processes. The time constants vary greatly, espe...

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Problems solved by technology

[0004] At present, there are few studies on the coordinated control system of integrated coal gasification combined cycle power plants at home and abroad. Basically, the conventional single-loop proportional integral differential is used to control the gasifier and gas turbine separately, and the solution to the power island and gasification island has not been realized. Coupling control, the coordination of the control of the power island and gasification island with huge difference in time constant is poor, and the control effect is poor

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