Simulation Research On Cooperative Control Strategy For Generator And Power Grid In An Isolated Network Integrated With Thermal Power Unit

In recent years, several high-frequency problem in isolated networks occurred because of bigelectricity cuts or serious faults. Such as India’s great blackout in2012, the breakout of WesternEurope as well as the islanding in south part of Guizhou Province in2006.It’s significative to study the control strategies for super and ultra-super power units to solve thehigh-frequency problem in isolated networks. Thus we need to simulate and analyze in a long time.The super and ultra-super boilers have quite different dynamic characteristics and controlstrategies compared with subcritical boilers. So building super and ultra-super boilermodels is quite necessary to meet the needs of long-term network simulations.（1）we studied typical structures, functions and technical points of boiler andturbine operating in super and ultra-super power units. Simultaneously, we studied theLogic and links of the coordinated control system. Through analyses and simplifications,we built the models of concurrent boiler and coordinated control system which canreflect the dynamic characteristic of mechanical power as well as adapt to power systemsimulation.（2）Based on the mathematical models and differential equations, we used themethod of object-oriented programming to develop and implement the models ofconcurrent boiler and coordinated control system in PSD-FDS (power systemdepartment-full dynamic simulation) by using C++.（3）We use the measured data from Huayu Power Plant in Henan and the modelsbuilt in chapter three to simulate. Then we contrast the simulation results with measureddata to verify the correctness of the concurrent boiler model and coordinated controlsystem model. By using PSD-FDS，we simulate the high-frequency predictive control strategy andthe results showed that the control strategies were effective. we put forward the control strategiesfor super and ultra-super power units to solve the high-frequency problem in isolated networks.Using PSD-FDS，a complete simulation platform was built to simulate the high-frequency predictivecontrol system and the results showed that the control strategies were effective.