基于分岔理论的电解铝负荷功率冲击特性对电压稳定性影响

Effect of Impact Load of Electrolytic Aluminum on Voltage Stability Based on Bifurcation Theory

负荷功率冲击特性对电网系统带来不利影响.使用非线性动力系统分岔分析方法,系统采用等值单机发电机二阶模型和带有可以反映电解铝冲击特性的负荷模型研究负荷功率冲击特性对电压稳定的影响.仿真结果表明,通过一维分岔点搜索,得出系统有鞍结分岔发生,会引起电压失稳;二维分岔曲线与时域仿真表明冲击扰动时系统无功稳定域变小.

Load power impact properties will adversely affect the grid system. The research on impactcharacteristics of electrolytic aluminum load on voltage stability is completed by using bifurcationtheory of the nonlinear dynamic system analysis method and the second-order model of theequivalent generators with load model that can reflect the power impact properties of electrolyticaluminum. The simulation results show that the saddle-node bifurcation occurs and will causevoltage instability during searching by one-dimensional bifurcation point. Two-dimensional bifurcationcurve and time domain simulation show that the reactive power stability region becomessmall when the system is disturbed.