Frequency Fluctuation Control Of Power System Based On Adaptive Dynamic Programming

Due to the randomness,intermittentness,and unpredictability of wind farm power output,large-scale wind power will generate large frequency fluctuations when it is connected to the system.Therefore,new control methods need to be studied to solve the problem Frequency fluctuation problem.This paper designs a kind of frequency fluctuation control based on adaptive dynamic programming method,which provides a new method for eliminating the frequency fluctuation caused by large-scale wind power grid connection.This paper introduces the development of wind power generation at home and abroad,the status of wind power grid connection research at home and abroad,and the status of research on frequency control of power systems with wind farms at home and abroad.The need to control frequency fluctuations in power systems.The power output characteristics of the wind farm and its impact on the power system power balance are given,and it is pointed out that the previous frequency fluctuation control methods need to be improved to cope with the frequency fluctuations of the power system in the case of large-scale wind power access.The scope of the situation.This paper designs a new frequency deviation(ACE)signal,which is obtained by a linear combination of wind farm output,conventional power plant output,frequency offset,and tie line power deviation,thereby improving the frequency control effect of the power system in the case of wind power access,and A frequency deviation(ACE)model for wind power grid connection is established.In order to get rid of the shortcomings of poor adaptability to the power grid in changing operating conditions,this paper introduces an adaptive dynamic programming algorithm based on fuzzy PI control,and designs a fuzzy PI controller based on adaptive dynamic programming to make fuzzy PI control Realize adaptive coordination control function for wind power systems with different load changes.In this paper,the effectiveness of this method is confirmed by system simulation with two regions including wind power.This method not only has a better control effect on the power system frequency fluctuation caused by the high frequency and large changes of wind power output,but also has better adaptability to the actual system and has a stable effect on suppressing load fluctuation.The controller can also be extended to other power system control problems.