摘要
大规模新能源通过电力电子设备并入电网,影响电力系统的动态运行特性。惯量是反映电网抗频率扰动能力的重要特性指标。基于机电扰动传播特性建立数学模型,通过分析扰动传播速度与惯量之间的映射关系,提出了电网母线节点的惯量分布辨识方法,实现对电网不同节点的频率抗扰动能力的在线评估。基于惯量分布结果,进一步评估了新能源接入对电力系统惯量特性的影响。通过IEEE 39节点系统仿真验证了所提惯量分布辨识方法的有效性,分析了新能源接入对电网惯量分布的影响。
With the increase of renewable energy generations integration,the dynamic behaviors of power system are affected.The inertia characteristic of power system is a critical factor reflecting the ability of resisting frequency disturbances.Based on the characteristics of electromechanical disturbance propagation,a mathematical model is established in this paper.To evaluate the frequency anti-disturbance ability of different buses in the grid,the inertia distribution identification method is proposed according to the relationship between propagation speed and inertia.Based on the inertia distribution results,the change of inertia characteristics of power system caused by the integration of renewable energy generation is further evaluated.Then,the IEEE 39 test system simulation validates the effectiveness of the approach and reveals the impact of new energy integration.
作者
赵波
章德
胡柳君
马俊杰
李勇
王炜宇
ZHAO Bo;ZHANG De;HU Liujun;MA Junjie;LI Yong;WANG Weiyu(School of Automation,Beijing Information Science and Technology University,Beijing 100192,China;Economic and Technology Research Institute of State Grid Hunan Electrical Power Co.,Ltd.,Changsha 410004,China;College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)
出处
《电力建设》
北大核心
2020年第8期25-31,共7页
Electric Power Construction
基金
国家电网公司科技项目“多回特高压直流馈入后湖南交直混联电网安全稳定评估与规划决策关键技术研究”(5216A218000B)。
关键词
惯量
频率扰动
机电扰动
惯量分布
新能源
inertia
frequency disturbance
electromechanical disturbance
inertia distribution
renewable energy
