Control system and method for heat supply apparatus of nuclear power plant

A control system for a heat supply apparatus of a nuclear power plant, comprising:

• a first-stage pressure measurement means configured for measuring a first-stage pressure of a turbine to obtain a first-stage pressure signal;
• a high-exhaust pressure measurement means configured for measuring an exhaust pressure of a turbine high-pressure cylinder to obtain an exhaust pressure signal;
• a steam extraction heating flow rate measurement means configured for measuring a steam extraction heating flow rate to obtain a steam extraction heating flow rate signal;
• a data acquisition module configured for acquiring and transmitting the measured first-stage pressure signal, the measured exhaust pressure signal and the measured steam extraction heating flow rate signal to a core operation processing module;
• the core operation processing module configured for receiving the first-stage pressure signal, the exhaust pressure signal and the steam extraction heating flow rate signal transmitted from the data acquisition module, and generating an action instruction for each of valves in the heat supply apparatus based on the first-stage pressure signal, the exhaust pressure signal and the steam extraction heating flow rate signal or determining a turbine load value using the received signal, and transmitting the action instruction or the turbine load value to a signal output module;
• and
• the signal output module configured for receiving and transmitting the action instruction or the turbine load value from the core operation processing module to a field equipment for control,
• wherein the core operation processing module comprises:
• a steam extraction flow rate set value generation module configured for transmitting, to a heating flow rate automatic regulator module, a flow rate set value preset according to a heat network load demand or a set value given by an operator through the human-machine interface module;
• the heating flow rate automatic regulator module configured for receiving the set value transmitted from the steam extraction flow rate set value generation module and determining a deviation of the measured steam extraction heating flow rate from the set value, and then performing a proportional integral-differential (PID) operation based on the deviation and transmitting an operation result to a manual/automatic module;
• and
• the manual/automatic module configured for receiving the operation result transmitted from the automatic heating flow rate regulator module and controlling a steam extraction fast control valve (FCV) in the heat supply apparatus based on the operation result.