电网运行趋势实时安全评估方法  

Real-Time Security Assessment Methods of Power Grid Operation Trends

作　　者：王斌琪[1] 王海霞[1] 徐鹏[2] 卢政麟 杨胜春[2] 李峰[2] 李卫东[1] 

机构地区：[1]大连理工大学电气工程学院,辽宁省大连市116024 [2]中国电力科学研究院,江苏省南京市210003

出　　处：《电网技术》2015年第2期478-485,共8页Power System Technology

基　　金：国家电网公司科技项目(DZ71-13-039)~~

摘　　要：当前电网的运行状态愈加复杂,实时控制愈加困难,在短时间内进行准确、快速、全面地评估其运行趋势,对其运行安全至关重要。而现有的基于状态指标与风险指标的研究方法,均不能很好地同时保证评估全面性和快速性的双重要求。以在线实时运行评估为着眼点,以状态指标体系为基础,提出了包含初步评估和精确计算2步骤的电网运行趋势实时安全评估方法。其中,初估是结合模糊理论,利用负荷重要度所得到的区域重要度指标,判断发生冲击事件后系统的运行趋势,快速确定问题区域;精算是利用所提出的状态指标体系,确定并计算具体的危险指标。这样,既可满足实时评估的快速性要求,又可兼顾确定性状态指标体系的全面性。最后,以某区域电网运行断面为例,验证了所提评估方法的可行性。Under the situations of increasing complexity of power system and more difficulty in real-time control, it is critically needed for security to assess power grid operation trends accurately, rapidly and roundly in a short time. But it could not meet the double requirements of round and rapid assessment through the state indicator or rick indicator. This paper focuses on online real-time operation assessment, and establishes a real-time security assessment method of power grid operation trends based on state indicator system. The proposed method includes preliminary assessment and refined calculation. Preliminary assessment combines fuzzy theory with the obtained region importance indicator through calculation of load importance to determine system operation trends after adverse events and find out the problem region. Refined calculation calculates the indicators of state indicator system belong to the problem region and gets the specifically dangerous indicator. As thus, the double requirements of round and rapid assessments could be met. An example is given to prove validity and feasibility of the proposed method.

关 键 词：安全分析 趋势评估 在线计算 

分 类 号：TM721[电气工程—电力系统及自动化]