The Multi-Mode Optimization Operation of the Flexible Interconnection System Considering the Photovoltaic and Energy Storage Access Scenarios
Focusing on the randomness of distributed photovoltaic power,this paper proposes a flexible interconnection system optimization operation strategy.Firstly,the virtual synchronous control technology is improved to improve the DC bus voltage stability;secondly,the system operation mode is analyzed to judge the output logic of PV and storage units.Taking DC bus power balance as the underlying logic,the paper puts forward the power coordination optimization strategy and fault power supply restoration strategy with full consideration of factors such as the load balance degree of the distribution station area,the economical operation of the main transformer,and the amount of power lost in the faulty station area,etc.The paper also establishes a multi-objective optimization model to obtain the power commands of each port,and achieves the power flexibility mutualization of the flexible interconnected system through accurate regulation of the SNOP.Finally,a simulation model of the flexible interconnection system is built in Matlab/Simulink to verify the effectiveness of the proposed optimization strategy.
flexible interconnectionload balancingeconomical operation of main transformerpower mutualization
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