Low-frequency load shedding method for new energy transmission systems with multiple protections based on improved WSO
Against the backdrop of the continuous expansion of the scale of China's new energy grid and the grid connected capacity of new energy generation,the risk of power fluctuation in the new energy transmission system has increased,which puts higher require-ments on the low-frequency load shedding of the third line of protection in the power grid.A low-frequency load shedding method was proposed for new energy transmission systems with multiple protections based on an improved WSO algorithm to address the issues of low qualification rate,poor stability,and insufficient timeliness in existing low-frequency load shedding execution schemes.Firstly,con-sidering the fluctuation of the transmission system line relative to the trend of the entire network load curves,establish an index system based on low-frequency load shedding execution plan.Secondly,establish an objective function for the index system of low-frequency load shedding schemes,while considering the static and transient constraints of the system to establish a low-frequency load shedding setting model.Then,the global dynamic hunting characteristics of the White Shark Optimization(WSO)algorithm were introduced,and the Particle Swarm Optimization(PSO)algorithm was improved with multiple strategies including tent chaotic mapping,dynamic time factor,and polynomial mutation.Finally,based on the modified IEEE39 node,empirical analysis was conducted to solve the low-frequen-cy load shedding setting model using the improved WSO-PSO algorithm proposed in this article.It was proved that the proposed method has better execution qualification rate,stability,and application timeliness compared to other methods.
new energylow frequency load sheddingsetting methodparticle swarm optimization algorithmWhite Shark Algorithm
万方数据
维普
