Experience of development and implementation of new electrohydraulic turbine control systems of the Leningrad Metal Plant for nuclear power plants

Abstract

An experience of development and implementation of electrohydraulic control systems with the application of microprocessor systems is considered by the example of a K-1000-60/3000 turbine of plants nos. 3 and 4 of the Kalininskaya nuclear power plant (NPP). The long-term operation of the electrohydraulic control system on power generation unit no. 3 of the Kalininskaya NPP, which encloses the electronic part of the control system (EPCS), confirmed wide possibilities of the system. Modern requirements to the power control of power generating units were a basis for the development of the control system with the extended functions of the microprocessor part and with the individual control of control valves with the use of a hydroelectric drive. The system was developed and implemented on the K-1000-60/3000 turbine of plant no. 4. Test results for power generating unit no. 4 allowed one to make a decision of putting into commercial operation of the mode of the total primary control of frequency (TPCF). For the first time, the possibility of the operation of the power generating unit of the NPP with the water-moderated water-cooled power reactor (WWPR) was tested and proved in the mode of the normalized primary control of frequency (NPCF) with the power errors up to ±2% of nominal without the displacement of control rods of the reactor only due to the use of the self-control effect of the reactor plant.