The Research Methods And Simulation Optimization Of Nuclear Power Plant Key Process

China’s nuclear power industry is in a stage of rapid development, in accordancewith the national development plan to2020, China’s installed nuclear power capacitywill be increased from40million kilowatts to70million kilowatts. Safe and efficientuse of nuclear energy provide protection for the rapid development of nuclear power.Nuclear power plant control and management of key technologies is built on the basisand development of control science and technology.Every development of controlscience is the solution of various problems in the practical application and deepthinking. Intelligent control is an important area of research in artificial intelligenceand automatic control, intelligent control applications in the nuclear power plantcontrol is a hot research in recent years. In addition the swarm intelligence researchand applications have also been widespread concern, swarm intelligence as artificialintelligence branch because of its advantages of application method is feasible andeasy to implement in many fields of research have achieved good results. In terms ofcontrolled entities: With the development of direct digital control technology(DDC:Direct Digital Control), nowadays at home and abroad widespread use ofnuclear power plant computer control system is mostly built on the basis of DCS(Distributed Control System), its good performance ensure the normal operation ofnuclear power plants. In the reactor type, the pressurized water reactor nuclear powerplants accounted for a major share of the domestic and international commercialnuclear power generating units. Pressurized water reactor nuclear power plant, andin-depth study on the reactor power control, differential pressure and feedwater flowcontrol of the steam generator is reflected in this paper. On the basis of a simulationmodel, the traditional control theory and the theory of intelligent control are usedfrom the perspective of real-time control of the control optimization. From the uncertainty of the development and changes of things, random networks and randomprocess theory are used in the start-up phase of reactor and in the accidentcontingency process analysis and quantitative algorithm optimization. Based on theexisting computer hardware and software technology，the control and operationinformation management system platform of nuclear power plant were designed andestablished in detail. The main research work and achievements include:(1) Construction of simulation model of the average temperature of the coolantcontrol in nuclear power plant reactor power control system and the comparison ofresult between traditional control rod speed program design and the fuzzy control rodspeed program.Transient reactor power control of the main control loop and thecontrol rod movement analysis and simulation were analysised in this paper. Rodspeed control of the fuzzy effect and conclusions are achieved.(2) Digital PID algorithm and particle swarm optimization combining ideas isused to get the preliminary goal and to establish the sampling range of the controlparameters in the instance of control loop of steam generator differential pressure andwater flow. The combination of steady state control and transient control analysismethod is used to analyze the affect of control parameters change and trend results,control parameter optimization is obtained and the blindness of looking foroptimization is reduced.(3) Uncertainty in the process of the control operation of nuclear power plantswere analyzed from the perspective of the random process. Cooling pump startupprocess in the start-up phase of reactor is used as a reactor startup process analysisexample, Cooling pump startup success probability, time consuming, and theconditional probability associated with the production process were calculated. Similarstochastic process analysis method suitable for nuclear power plant extract wereextracted from the calculation process. Optimization method was put forward in caseof certain preconditions emergency resources treated as unexpected events and nuclearemergency process for nuclear power plants to reduce the impact of nuclear accidentsand sudden nuclear events based on the analysis of emergency treatment process ofFukushima nuclear accident in Japan.(4) Nuclear power plants in china are currently widely used foreign commercialDCS control system. System requirements for different application environments aredifferent, the function of the system expansion is subject to the protection of foreignintellectual property. Self-development and design is the development trend ofChinese nuclear power industry. In this paper in connection with the nuclear power plant control and operation of information management, real-time control information,statistical data as well as optimal control parameter information were integrated in thenetwork platform for data integration. Detailed design and technical details were putforward. Specific ideas was provided to the independent software development for thenuclear power plant subsystems.