Research On Active Power Security Correction With Wind/Solar/Battery Hybrid Power System

With the considerable development solar energy, wind power andenergy storage technology, large-scale wind-solar-battery hybridgeneration systems have been proposed to integrate into power grids. Theactive power security correction problem has also become a researchfocus.In the active power security correction problem of wind/solar/batteryhybrid power system, energy storage devices control strategy is necessary.In this paper, a charge/discharge control strategy is proposed. Thestrategy considered the SOC of the energy storage unit, and it minimizethe fluctuation of active power. By simulation, the effectiveness of thecontrol strategy is convinced. According to the simulation results thecharacteristics of overall output is comprehensively evaluated, and therelation between indices and energy storage capacity configuration isanalyzed. Then the method of capacity allocation optimization method isput forward.For the security correction of grid-connected wind/solar/batteryhybrid power system, this article research on security correction withpossible flow limit violation. Firstly, sensitivity model is proposed. Itconclude line flow sensitivity model contribute to the wind/solar/battery hybrid power system, and sensitivity model of the variable node on a lineflow contribute to one single-branch line flow. With adjustment variableas minimum optimization objectives, an active security correction modelis established caused by flow limit violation when wind/solar/batteryhybrid power system connect the grid. Then the state division ofwind/solar/battery hybrid power system is proposed. As the active safetycorrected assessment indicators, this index provides a basis for evaluationof the safety analysis. Finally, an example analysis shows theeffectiveness of the work of this research.