摘要
利用灵敏度技术定义了电网脆弱域指标,给出了计算参数灵敏度的算法。通过该算法可得到节点电压对任何网络参数的灵敏度,比如线路电抗、电网无功功率的变化等。综合考虑节点电压关于线路电抗和系统无功功率变化的灵敏度,提出了电压失稳指标。分析了系统负荷和线路结构发生变化时对电网电压的影响,确定了电网的脆弱域和脆弱母线。将该算法应用到IEEE 30节点和IEEE 118节点系统,仿真结果证明了算法的高效性及应用价值。
By use of sensitivity technique the authors give the definition of the index of power grid vulnerable region and propose an algorithm to calculate parameter sensitivity. By means of the proposed algorithm the sensitivity of nodal voltage to any network parameter can be obtained, such as line reactance, variation of reactive power of power grid and so on. Considering the sensitivity of virtual nodal voltage to line reactance and variation of reactive power of power grid comprehensively, the voltage instability index is put forward. The influences of the variation of system load and that of line structure on power grid voltage are analyzed, from this the vulnerable region and vulnerable bus of power grid voltage are determined. Applying the proposed algorithm to IEEE 30-bus system and IEEE 118-bus system, the efficiency of the proposed algorithm is validated by the simulation results and its application value is proved.
出处
《电网技术》
EI
CSCD
北大核心
2008年第14期54-58,共5页
Power System Technology
