文章摘要
杨京,王彤,毕经天.含直驱风电机组的电力系统次同步振荡鲁棒阻尼控制[J].电力系统自动化. DOI: 10.7500/AEPS20190128009.
YANG Jing,WANG Tong,BI Jingtian.Robust Damping Control of Subsynchronous Oscillation in Power System with Direct-drive Wind Turbines[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20190128009.
含直驱风电机组的电力系统次同步振荡鲁棒阻尼控制
Robust Damping Control of Subsynchronous Oscillation in Power System with Direct-drive Wind Turbines
DOI:10.7500/AEPS20190128009
关键词: 次同步振荡  混合H2/H∞控制  鲁棒控制  凸多面体模型  直驱风电机组
KeyWords: subsynchronous oscillation  mixed H2/H∞ control  robust control  convex polytope  PMSG
上网日期:2019-11-30
基金项目:国家自然科学基金重点项目
作者单位E-mail
杨京 新能源电力系统国家重点实验室华北电力大学 763034978@qq.com 
王彤 新能源电力系统国家重点实验室 hdwangtong@126.com 
毕经天 中国电力科学研究院有限公司 bijingtian@139.com 
摘要:
      风电功率波动会导致电力系统运行点变化,为有效提高次同步振荡阻尼控制的适应性,文中采用直驱风电机组附加控制的方法设计了一种次同步振荡鲁棒阻尼控制器。首先,基于状态空间模型利用含区域极点配置的混合H2/H∞控制方法抑制由随机扰动引起的电力系统次同步振荡。将不同运行点作为凸多面体的顶点构建凸多面体模型,以适应风电输出波动引起的系统运行点大范围变化,提高控制器的鲁棒性。然后,利用线性矩阵不等式求解状态反馈矩阵设计次同步振荡鲁棒阻尼控制器。最后利用接入两台直驱风电机组的4机2区系统作为测试系统进行时域仿真,仿真结果表明,基于凸多面体的鲁棒阻尼控制器不仅能够为系统次同步振荡模式提供足够的阻尼,并且在风电功率在较大范围内变化的情况下,控制器也具有较好的控制效果。
Abstract:
      The fluctuation of wind power power may lead to the change of power system operating point. In order to effectively improve the adaptability of subsynchronous oscillation damping control, a subsynchronous oscillation robust damping controller is designed by using the additional control of permanent magnet synchronous generator (PMSG). Firstly, based on the linearized state space model, the mixed H2/H∞ control with regional pole placement is used to suppress the subsynchronous oscillation in the power system caused by random disturbance. The convex polytope model is constructed by using different operating points as the vertices of the convex polytope to adapt to the wide variation of system operating points caused by wind power output fluctuations and improve the robustness of the controller. Then, a linear matrix inequality is used to solve the state feedback matrix and design a subsynchronous oscillation robust damping controller. Finally, A 4 machine, 2 area system with two PMSGs is used as the test system for time domain simulation. The simulation results show that the controller based on polytope can provide sufficient damping for the subsynchronous oscillation modes, and the controller also has good control effect when the outputs of wind power change over a wide range.
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