With the gradual maturity of renewable energy generation technologies,the power system with 100%renewable energy supported only by converter-interfaced sources has become an important power grid form for green energy development and utilization.The characteristics of converter-interfaced sources and synchronous generators are significantly different,so the traditional power flow analysis method is not suitable for the power system with 100%renewable energy.Firstly,a unified converter steady-state model is derived based on the governing equations of gird-following control and gird-forming control,which can be used to calculate the power flow of the power system with 100%new energy.Then a power flow analysis model for the power system with 100%new energy under power-frequency coupling is established by combining the steady-state converter equations and node power equations,and the steady-state frequency is used as a variable to participate in power flow iteration.Finally,the simulation analysis based on IEEE 9-bus and IEEE 33-bus system verifies the correctness of the proposed power flow analysis model.
关键词
100%新能源电力系统/跟网型控制/构网型控制/潮流计算/稳态频率
Key words
power system with 100%renewable energy/gird-following control/gird-forming control/power flow calculation/steady-state frequency
维普
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