Research On Comprehensive Optimal Configuration Of Dynamic-static Reactive Power Compensation In Distribution Network With Distributed Generation

In recent years,with the optimization and upgrading of the power grid structure and the state's strong support for the development of green renewable energy,the penetration rate of distributed generation in the distribution network has been continuously improved.At the same time,due to the rapid development of the economy,the electricity load has been increased.Increasingly,it poses a huge challenge to the traditional reactive power compensation configuration method.This paper analyzes and summarizes the research status of reactive power compensation comprehensive optimization configuration,and studies the effects of reactive power compensation and distributed power supply on distribution network,analyzes the selection of reactive power compensation equipment type.And analyzes the impact of distribution network with distributed generation on the demand for reactive power compensation equipment,which provides a theoretical basis for subsequent research.The cost of the switchable capacitor configuration is lower than that of other reactive power compensation devices,and the distribution static synchronous compensator has two-way and smooth adjustment capability.This paper studies the integrated configuration methods of two kinds of compensation equipment,and improves the economics of the power grid through coordinated control.In order to reflect the difference between the dynamic and static reactive power compensation equipment in timing control and the economic impact on the grid,this paper considers the overall economics of the power grid at the macro level and the multi-period optimization method at the micro level,and proposing a method for comprehensive optimal configuration of dynamic-static reactive power compensation in distribution network with distributed generation.In the simulation of the example,in order to improve the optimization efficiency,the double-layer optimization method is adopted,and the minimum annual cost is taken as the upper-level planning target.The installation position,capacity of the static synchronous compensator and capacitor of the distribution network are used as the upper-level optimization variables.The minimum annual cost of the power grid loss and the cost of the capacitor adjustment are taken as the lower-level planning targets.The reactive output of distribution static synchronous compensator and the switching state of the capacitor are used as the lower-level optimization variables.In view of the increasing penetration rate of distributed generation in power grids today,this paper simulates the demand for reactive power compensation configuration of distributed power sources under different penetration rates,and provide an effective reference for the reactive power compensation configuration capacity of distribution networks with distributed generations.