FLEXIBLE COORDINATION CONTROL METHOD FOR THERMAL POWER UNIT SUITABLE FOR DEEP PEAK REGULATION OPERATION

摘要

A flexible coordination control method for a thermal power unit suitable for the deep peak regulation operation. According to the method, a reverse compensation channel of a fuel volume instruction to a power generation load instruction is added on the basis of a coordination control system in a traditional turbine-follows-boiler mode. At the same time, a main steam flow signal is used to construct a flexible factor, and the gain of the reverse compensation channel is corrected by the flexible factor in a product mode to obtain a reverse power generation load instruction bias value. The power generation load instruction of the unit is corrected by using the reverse power generation load instruction bias value so as to achieve the purpose of preferentially ensuring the control quality of the power generation load and the steam pressure in front of a steam turbine under the conventional load working condition, and preferentially ensuring the combustion stability under the deep peak regulation working condition. According to the present invention, the rate of change and the amplitude of the downward change of the fuel volume instruction are reduced by the reverse compensation channel of the fuel volume instruction to the power generation load instruction, the control effect under various working conditions is ensured, and the control requirements of the thermal power unit under the conventional load working condition and the deep peak regulation working condition can be met.