Research on Voltage Stability Strategy of Energy Storage Access to High Penetration Wind and Solar Power Distribution Network System with SOP (Soft Open Point)

With the continuous consumption of energy, the ecology is becoming increasingly harsh. The penetration of environmentally friendly new energy, mainly symbolized via wind and solar energy, in the world new energy generation is constantly increasing, leading to changes in the modern power grid structure. Moreover, the intermittent as well as fluctuating characteristics of wind and solar power generation have enhanced its power flow imbalance. In the power network, voltage is a highly regarded indicator via measuring system stability, and therefore can be used as an indicator for measuring the stability of new power grids. This article analyzes the power flow distribution of the node system under the IEEE 33 with energy storage as well as reconstruction mode, from the perspective of the high penetration wind and solar energy storage and distribution power grid with the continuous augmentation of new energy generations. The voltage of characteristic nodes is selected as the voltage stability index, and the detecting method of the voltage fluctuation index of system nodes is established with the goal of examining the voltage fluctuation index during the continuous increase of wind and solar penetration, which provides a reference for the study of voltage stability theory and practice in high penetration wind and solar energy storage and distribution power grids.