Research On Simulation Method Of Parallel Operation Of Multiple Generators

With the continuous development of independent power systems,the power supply modes of multiple generators operating in parallel in the field of strong mobility and special working conditions are widely used.Parallel operation in independent systems is frequent and requires high reliability and stability.Therefore,the practical significance of studying the parallel operation of multiple generators is prominent.Through the research on the simulation method of parallel operation of multiple generators,the dynamic process of parallel operation is analyzed,and the stable operation of the parallel system is realized by simulation.In this paper,the research direction is determined by literature retrieval and induction,and the simulation research is carried out in combination with the operating conditions of the ship power system.Firstly,the mathematical model of the seventh-order synchronous generator,diesel engine and its speed control system and excitation system is analyzed and established.Secondly,the diesel generator set simulation model is built based on the mathematical model,and the single-machine running system is built with the load module.The loading and unloading test verifies the correctness of the model;then analyzes the influence of the impact current during the parallel operation,the synchronization effect of the synchronous torque,the synchronous torque coefficient,and the frequency modulation and load transfer of the generator,focusing on the principle of the impact current.The integrated calculation formula of the impact current with voltage difference and phase angle difference is combined with the generator example to calculate the parameters,which provides the basis for the parallel controller parameter setting.Finally,the parallel operation control principle is used to build the MATLAB/Simulink software platform.The parallel controller model is used to construct a complete multi-machine parallel operation simulation system.Based on the parallel operation simulation of two generators,the parallel operation simulation test of multiple generators is completed in combination with the actual operating conditions of the ship,and the parallel dynamic process and simulation method are analyzed.The simulation results show that the simulation method of parallel operation of multiple generators used in this paper is correct,the simulation model is reasonable and effective,and the simulation results meet the expected goals,which is consistent with the actual situation and has practical value.