Pressurized water reactor nuclear power unit primary and secondary loop system transmission power simulation method and system

Abstract

The invention discloses a pressurized water reactor nuclear power unit primary and secondary loop system transmission power simulation method and system. The method comprises the following steps of: initializing the parameters of the pressurized water reactor nuclear power unit; obtaining the electric quantity data of the step size according to the preset rules; solving the primary loop system model and the secondary loop system model of PWR nuclear power unit and obtaining the calculation parameters. The final steam valve output power in the PWR nuclear power system model is calculated by using the calculation parameters, and the output power of the final steam valve is the transmission power of the primary and secondary loop systems of the PWR nuclear power unit. By fitting the specificenthalpy of the main steam and the feed water and taking into account the bypass discharge and the thermal efficiency of the unit, the method and the system solve the problem that the transfer power of the primary and secondary loop systems of the existing nuclear power unit model cannot be accurately calculated by adopting the method of calculating the enthalpy drop per unit time, and improve thesimulation accuracy of the nuclear power unit model.

Description

technical field [0001] The present invention relates to the field of electric power systems, and more specifically, to a method and system for simulating the transfer power of the first and second loop systems of a pressurized water reactor nuclear power unit. Background technique [0002] At present, my country's nuclear power is developing rapidly. According to the national nuclear power medium and long-term development plan, by 2020, China's nuclear power installed capacity in operation will reach 58 million kilowatts, and the capacity under construction will reach 30 million kilowatts. The proportion of nuclear power installed capacity will increase from 1 in 2015. % raised to 5% in 2020. With the gradual increase of the proportion of nuclear power in the power system, especially with the gradual commissioning of large-scale nuclear power bases in the eastern coastal areas, many new problems will arise in the operation of the power grid. Since both nuclear safety and pow...

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Problems solved by technology

[0005] In order to solve the problem that the existing simulation model for the PWR nuclear power unit in the background technology cannot fully simulate the characteristics of the nuclear power unit, and fails to take into account the power transfer between the primary and secondary loop systems, resulting in large simulation errors, the present invention provides A method and system for simulating the power transfer of the first and second circuit systems of a PWR nuclear power unit are proposed; the method and system are based on the characteristics of the saturated wet steam of the nuclear steam turbine, and by fitting the specific enthalpy of the main steam and feed water, while considering the side discharge and the thermal efficiency of the unit, by using the method of calculating the enthalpy drop per unit time, the accurate simulation of the power transfer between the nuclear steam supply system and the prime mover is realized. The power transfer simulation method of the first and second loop systems of the pressurized water reactor nuclear power unit includes :

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