核动力装置联合仿真系统构建与控制器设计
- II -
Co-Simulation System Construction and Controller Design of
Nuclear Power Plant
Abstract
In order to ensure the safety and stability of nuclear power plants and avoid major
accidents, it is necessary to conduct simulation analysis on them in advance. RELAP5 is the
best estimation program for the transient behavior of the light water reactor cooling system
accident conditions covering the transient analysis of the entire light water reactor system,
which is widely used in the simulation of nuclear power plants. However, the RELAP5 program
cannot conduct simulation analysis on complex control systems. The human-machine interface
and storage of simulation results are not perfect enough. Therefore, this paper designs a co-
simulation system based on the platform of the RELAP5 and MATLAB whose data interaction
is realized by the application of SOCKET. MySQL database realizes the function of storing
simulation data. In addition, it also designs the client interface to improve the attributes of
human-machine interaction. Using the co-simulation system to realize the fuzzy control algorith
which verifies the practicability and scalability of the system.
This paper firstly analyzes the structure of the primary circuit of the nuclear power plant
and builds the modelling of the key equipment of the primary circuit. Referring to the model
parameters of Qinshan Nuclear Power Station, the primary loop models are built by RELAP5
program and the steady-state verification calculation is carried out on the model. The data
interaction between RELAP5 and MATLAB is designed based on SOCKET whose
communication is carried out by UDP protocol. The data receiving and sending on the terminal
of RELAP5 and MATLAB are processed respectively. MySQL database is used to store
simulation results and add indexes to some fields to increase the query speed. The front-end
interface of the simulation system based on Qt is designed, including functions such as user
login, visual modification input, running or terminating the program, and simulation result
analysis. In order to achieve remote access to the database, the WEB server based on HTTP
protocol is designed. When entering a URL in the browser, it can remotely access the simulation
results and use multi-threading technology to optimize the WEB server. The controller in
RELAP5 is implemented in SIMULINK and a real-time interaction method between
SIMULINK and Base Workspace of MATLAB is designed. The simulation results verify the
practicability of the co-simulation system. The well-designed co-simulation system, which
designs the steam generator water level controller based on the fuzzy control algorithm, is used
