程军照,林涛,杜蕙.计及新能源出力波动性的节点状态脆弱性评估[J].电测与仪表,2021,58(12):118-124. chengjunzhao,Lin Tao,Du Hui.The state vulnerability assessment considering the output fluctuation of renewable power supply nodes[J].Electrical Measurement & Instrumentation,2021,58(12):118-124.
计及新能源出力波动性的节点状态脆弱性评估
The state vulnerability assessment considering the output fluctuation of renewable power supply nodes
The state vulnerability of power grid can reflect the power grid"s ability to withstand voltage or frequency disturbance from the perspective of operation state.With the access of high permeability renewable energy, the operation mode and security control means of power system become more and more complex.It is necessary to improve the existing node state vulnerability assessment methods and evaluate the state vulnerability by considering the characteristics of new energy units and their output volatility.Based on the David nan equivalent model of new energy power parallel network, this paper proposes a new energy power node off-grid immunity index and calculation method, and on this basis, takes into account the volatility of new energy power supply output, and proposes a new energy power node state vulnerability index based on point estimation method.This method can be applied to the vulnerability assessment of node state under different access schemes of new energy power stations and the comprehensive assessment of the off-grid risk of new energy power supply nodes under the condition of output fluctuation of new energy.
