2 results about "Variable load" patented technology

The invention relates to a coal-fired unit variable rate load control method based on AGC instruction state change judgment, which comprises the following steps: an instruction receiving device receives a load instruction, generates an AGC instruction, acquires a main steam pressure signal and a generator power signal, and sends the signals to an industrial control computer; and the industrial control computer judges and processes the state of the AGC instruction, adopts different load variable rate strategies on a steam turbine side and a boiler side according to a judgment result, and then performs control operation on unit load and pressure according to a variable rate processing result to generate a control valve opening instruction of the steam turbine. The method has the beneficial effects that the AGC instruction is divided into a stable state and a dynamic state; in a stable state, the characteristic of rapid load adjustment of the steam turbine is exerted, and variable load adjustment is carried out at a high rate; under the dynamic working condition, load response is carried out at a conventional rate, the load regulation performance index of the unit is effectively improved, and the AGC response capability of the unit is improved.