摘要
大规模风电并网后的电压控制问题应从系统的角度统筹考虑,通过建立少量集中无功补偿与风电场分散无功补偿相协调的综合控制模式来解决,因此,集中无功补偿点的选择成为关键。基于网络源流路径关系,提出一种考虑风电场关联度的区域电网电压主导节点识别方法。该方法综合考虑了相对静态的电网结构和电网实际运行状态变化的影响,并采用网络源流路径双向电气剖分方法获取电网主要电气特征参数。利用上述参数,计算风电场关联度指标和电压主导节点评价指标,从而确定电压控制分区和主导节点。在修改后的IEEE 39节点系统中进行了仿真分析,结果表明所提出的方法能够较合理地确定电压主导节点。
The voltage issue for a power system with large-scale wind power integration should be solved from the regional grid perspective by creating a comprehensive control mode of coordinating centralized compensation in some pilot nodes and decentralized compensation in wind farms.So the pilot node selection is becoming the key problem.Based on the electrical relationship between sources and flows of power grids,an approach to pilot node identification is proposed by considering the relevancy among wind farms.This method comprehensively considers the impact of both the relatively static grid structure and dynamic operation state.The main electrical characteristic parameters are obtained by adopting the bidirectional electrical dissection method for use in calculating the index of electrical correlation among wind farms and that of pilot node evaluation. Thus voltage control partitions and pilot nodes are identified.Analysis results from a modified IEEE 39-bus system show that the approach can be used to make rational selection of pilot nodes.
出处
《电力系统自动化》
EI
CSCD
北大核心
2015年第4期40-45,共6页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(51177074)~~
关键词
风力发电
主导节点识别
源流路径
双向电气剖分方法
电压控制
电压稳定
wind power generation
pilot node identification
power source and power flow path
bidirectional electrical dissection method
voltage control
voltage stability
