Shock Load Modeling And Analysis Of Power Quality

Load model is the basis for power system analysis operation. The quality of the power system model for the calculation of trends, such as the stability of the system voltage have some impact. Meanwhile, with the development of technology, computing speed and increase storage capacity, which also indirectly for the establishment of a more accurate and realistic load model provides objective criteria.In recent years, the load and impact modeling and analysis of power quality research in the field of power systems has always been an important and meaningful topics with practical applications, but the exact impact shock load model is based on the analysis of transient stability of the load on the grid. For power systems and power quality studies, both theoretical significance and practical value.Power load are important components of electric power systems. For load modeling has always been a hot-button issue in power system. Study about load modeling has also obtained much research and breakthroughs for normal loads, but shock loads need to research.On the basis of previous research, This article studies modeling of nonlinear shock loads and power quality study, work copleted is in the following areas.First of all, the author summarizes the characteristics of production of shock loads, studies the principle of shock loads and introduces the shock loads and impact modeling method of device.Secondly, the model structures and parameters identification of impact load and shock load model parameters identification using genetic algorithms are researched, and based on GUI interface the system parameter identification windows programs is made.Fitting data error is in line with the actual data error,within the permitted range, steady-state models has good fitting effect.Once again, through the research of load modeling method, because of shock load with time-varying, the power requirements of the initiative as well as the fluctuation frequency characteristics, curve fitting and multi-objective optimization are combined, objective function of shock load parameters identification is improved, a method of parameter identification based on measured impulse load model is proposed.Finally,the author introduces the comprehensive evaluation method of power quality based on grey system theory, gives the new method of power quality and makes the comprehensive assessment depending on measured experimental data results of the power quality of a certain impact load and power quality synthetic evaluation method of grey theory. Interface program is made again.