含双馈风电场的互联电力系统虚拟惯量与虚拟阻尼协调控制方法  

Coordinated control method of virtual inertia and virtual damping for interconnected power system with doubly-fed wind farm

作　　者：杨涛[1] 廖勇[1] YANG Tao;LIAO Yong(State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《电力自动化设备》2020年第11期92-98,共7页Electric Power Automation Equipment

摘　　要：风电场的大规模接入会同时降低互联电力系统的相对惯性和阻尼,虚拟同步发电机(VSG)技术能够有效支撑电网频率,目前对VSG技术虚拟阻尼方面的研究成果较少。为了更有效地利用VSG虚拟阻尼,进一步提升高风电渗透率电力系统的稳定性,推导了VSG控制器参数与虚拟惯量、虚拟阻尼之间的数学关系,针对VSG虚拟惯量与虚拟阻尼调节存在的矛盾,提出一种结合系统主导振荡模式在线辨识和粒子群优化算法的VSG控制器参数协调控制策略。最后通过含双馈风电场的两区域互联电力系统仿真模型验证了所提控制策略的有效性,仿真结果表明所提控制策略可实现系统频率稳定性和功率稳定性的综合优化。The relative inertia and damping of interconnected power system will be reduced at the same time due to the large-scale access of wind farms.VSG(Virtual Synchronous Generator)technology can effectively support the grid frequency,but there are few research results on virtual damping of VSG technology at present.In order to make more effective use of VSG virtual damping and further improve the stability of power system with high wind power permeability,the mathematical relationship between VSG controller parameters,virtual inertia and virtual damping is derived.In view of the contradiction between VSG virtual inertia and virtual damping regulation,a coordinated control strategy of VSG controller parameters combining online identification of dominant oscillation mode and particle swarm optimization algorithm is proposed.Finally,the effectiveness of the proposed control strategy is verified by a two-area interconnected power system simulation model including doubly-fed wind farm.The simulative results show that the proposed control strategy can achieve comprehensive optimization of system frequency stability and power stability.

关 键 词：虚拟惯量 虚拟阻尼 电力系统稳定性 虚拟同步发电机 系统辨识 

分 类 号：TM712[电气工程—电力系统及自动化] TM614