Research on Control Strategy of AP1000 Nuclear Turbine Primary Frequency Regulation
According to the requirements of the power system on the primary frequency regulation control of nuclear power units,the research on the primary frequency regulation control strategy of AP1000 nuclear power turbine is carried out.The limitations of AP1000 nuclear power unit for primary frequency regulation are analyzed.An AP1000 nuclear turbine primary frequency regulation control strategy is innovatively proposed,which involves a constraints response strategy and a fast response strategy.The limitation response strategy avoids the overrun condition of primary frequency regulation by setting the primary frequency regulation control parameters and primary frequency regulation cutout conditions,to reduce the following adjustment amplitude of the rod control system and the moisture separator reheater(MSR)related equipment system,and thus meet the requirements of safe operation of the unit.The fast response strategy sets up"feed-forward plus closed-loop"control of primary frequency regulation in the turbine control system to realize fast response control of primary frequency regulation.Combined with the control logic of AP1000,the automatic load regulation(ALR)primary frequency regulation control scheme is specifically given,and modeling simulation tests are carried out in Matlab/Simulink.The simulation test results show that the primary frequency regulation control performance index of the control scheme meets the requirements of the regional power grid.The proposed strategy and the test conclusions provide great significance for the subsequent AP1000 unit primary frequency regulation control retrofit work.
Nuclear powerTurbinePrimary frequency regulation controlLimitationControl strategy
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