Calculation of new energy grid-connected capacity limit based on short-circuit ratio index
In view of the weak anti-interference ability and poor stability of new energy grid-connected systems,based on the short-circuit ratio,a system capacity calculation method for the new energy generator units and the AC power grids was proposed.By promoting the short-circuit ratio index of the power grid systems and using the sensitivity calculation for method the power electronics multi-infeed systems,the system capacity could be accurately evaluated when affected by small interference factors,and the specific conditions of the systems reaching the critical state could be obtained,so the accurate calculations and analysis of the capacity limit for the new energy grid-connected system were achieved.The simulation results show that the capacity limit algorithm based on short-circuit ratio index has higher stability and anti-interference ability than the classical capacity limit algorithm.
new energygrid-connected systemanti-interferencestabilityshort-circuit ratiocapacity limitfrequency controlpower grid line
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维普
