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智能化电网中的柔性评价方法与应用
引用本文:孙伟卿,王承民,张焰.智能化电网中的柔性评价方法与应用[J].电网与水力发电进展,2011,27(5):5-11.
作者姓名:孙伟卿  王承民  张焰
作者单位:上海交通大学,电子信息与电气工程学院,上海,200240
基金项目:国家863项目支持(2009AA05Z213)
摘    要:针对新一代智能化电网对电力系统规划、运行和管理过程中经济性、安全性与灵活性等多指标综合趋优的要求,在电网的分析计算过程中,系统地提出并定义智能电网环境下电力系统多尺度柔性评价方法,并根据柔性参数的不同类型,将电力系统柔性划分为属性柔性、约束柔性、负荷柔性和结构柔性。在此基础上,针对系统运行安全约束柔性问题,进一步定义电力系统稳态约束柔性评价指标,为电网调度人员评价电网运行状态安全裕度大小提供直观依据。最后,以IEEE 30节点测试系统为算例,通过评价稳态情况下节点电压约束柔性大小并将评价结果应用于最优潮流的分析计算,说明所提方法的合理性与有效性。

关 键 词:智能化电网  多尺度  柔性评价  综合优化

Flexible Evaluation Method and Its Application in Smart Grids
Authors:SUN Wei-qing  WANG Cheng-min and ZHANG Yan
Affiliation:School of Electronic,Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China;School of Electronic,Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China;School of Electronic,Information and Electrical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
Abstract:Considering the demand of multiple indices such as economy, safety and flexibility for coordinated optimization in the process of planning, operating and managing of the next-generation smart grids, this paper proposes and defines a multi-scale flexible evaluation and analysis method, and divides the power system flexibility into four respects, including property flexibility, constraint flexibility, load flexibility, and structure flexibility. To address the constraints from system operation safety on flexibility, the current study defines the constraint flexibility evaluation index under steady state, providing self-explanatory evidences for power system dispatchers to evaluate the safety margin of the gird operation state. Finally, a case study of node voltage flexibility evaluation and its application in the analysis is conducted on an IEEE 30 bus test system. The results show the rationality and validity of the flexible evaluation and analysis method proposed.
Keywords:smart grid  multi-scale  flexibility evaluation  comprehensive optimization
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