Thermal power generating unit flexible coordination control method suitable for deep peak regulation operation

Abstract

The invention relates to a thermal power generating unit flexible coordination control method suitable for deep peak regulation operation. The method is characterized in that a reverse compensation channel of a fuel quantity instruction to a power generation load instruction is added on the basis of a traditional machine-furnace following mode coordination control system, and meanwhile, a main steam flow signal is used for constructing a flexible factor; the gain of the reverse compensation channel is corrected by the flexible factor in a product mode to obtain a reverse power generation loadinstruction bias value, and the unit power generation load instruction is corrected by using the reverse power generation load instruction bias value, so that the control quality of the power generation load and the steam pressure in front of the steam turbine is preferentially ensured under the conventional load working condition; and the combustion stability is preferentially ensured under the deep peak shaving working condition. The change rate and the downward change amplitude of the fuel quantity instruction are reduced through the reverse compensation channel of the fuel quantity instruction for the power generation load instruction, the control effect under various working conditions is guaranteed, and the control requirements of the thermal power generating unit on the conventionalload working condition and the deep peak regulation working condition can be met.

Description

technical field [0001] The invention relates to a control method of a thermal power unit, which is suitable for a thermal power unit requiring deep peak-shaving operation, and belongs to the technical field of power generation. Background technique [0002] Under the current technical conditions, it is difficult to store electric energy on a large scale. The power grid needs to increase the flexibility of thermal power generation load scheduling to absorb the double random disturbance caused by the large-scale grid connection of electricity load and renewable energy generation load represented by wind power, and maintain Grid frequency is stable. The main technical means to improve the flexibility of thermal power units is to broaden the range of power generation load regulation, and the key is to reduce the operating lower limit of the power generation load of the units, from the current 50% Pe (rated power generation load) to 40% Pe, 30% Pe or even more Low, to realize th...

AI Technical Summary

Problems solved by technology

In order to adapt to deep peak shaving and change the adjustment effect intensity, it is necessary to add more variable parameter logic, and it is very difficult to configure, debug and maintain on site

Images