【摘要】 采用多参数分岔分析方法对多机系统的动态负荷裕度进行研究,比较了基于连续潮流的分析结果和准静态分析结果的差别;以励磁参考电压Vref为控制参数,研究了多个励磁参考电压可控时系统的分岔点以及失稳模式的变化,给出系统在多励磁调节器(AVR)可控时的最大动态负荷裕度;以静止无功补偿器(SVC)补偿极限B0_max和控制电压参考值Vrefc为可控参变量,分别研究其对系统各种分岔的影响,并着重分析了对Hopf分岔的影响;研究了SVC附加控制对系统阻尼和动态负荷裕度的影响。所有仿真均在WSCC3机9节点系统实现。更多还原

【Abstract】 Multi-parameter bifurcation analysis method is used to study dynamic load margin (DLM) of multi-machine power systems. Simulation results are compared when using different analytical tools, such as continual power flow and quasi-steady state analysis. The changes of bifurcation points and unstable modes are studied, and the maximal dynamic load margin in multi-parameter bifurcation space is given. When more than one automatic voltage regulator (AVR) reference set point Vref are controllable, and the effects of SVC capacity limit B0_max and control set points Vrefc on system bifurcations, especially the Hopf bifurcation, are studied through multi-parameter bifurcation analysis respectively. Finally, the additional control of SVC controller is studied to show its effects on system oscillation and dynamic load margin. All the simulation results are obtained with the WSCC 3-machine-9-bus system.更多还原