文章摘要
赵金利,张继楠,贾宏杰,等.计及N-1约束的多维空间断面热稳定安全域边界快速计算[J].电力系统自动化,2016,40(4):128-135. DOI: 10.7500/AEPS20150428006.
ZHAO Jinli,ZHANG Jinan,JIA Hongjie, et al.Rapid Calculation of Sectional Thermal Security Region Under Constraint of N-1 in Multi-dimension Space[J].Automation of Electric Power Systems,2016,40(4):128-135. DOI: 10.7500/AEPS20150428006.
计及N-1约束的多维空间断面热稳定安全域边界快速计算
Rapid Calculation of Sectional Thermal Security Region Under Constraint of N-1 in Multi-dimension Space
DOI:10.7500/AEPS20150428006
关键词: 热稳定安全域  多维空间  多约束  分段线性近似
KeyWords: thermal security region  multi-dimensional space  varieties of constraints  piecewise linear approximation
上网日期:2016-02-01
基金项目:高等学校博士学科点专项科研基金(20120032130008);国家自然科学基金资助项目(51307116);南方电网科技项目(K-ZD2012-006)
作者单位E-mail
赵金利 智能电网教育部重点实验室, 天津大学, 天津市 300072 jlzhao@tju.edu.cn 
张继楠 智能电网教育部重点实验室, 天津大学, 天津市 300072  
贾宏杰 智能电网教育部重点实验室, 天津大学, 天津市 300072  
黄河 中国南方电网电力调度控制中心, 广东省广州市 510623  
李鹏 中国南方电网电力调度控制中心, 广东省广州市 510623  
余贻鑫 智能电网教育部重点实验室, 天津大学, 天津市 300072  
摘要:
      大规模互联电网潮流分布复杂,关键断面的输电极限影响因素较多,呈现出明显的多维特性,因而在多维参数空间中可以更为精细地刻画系统安全运行区域。为此,提出了一种计及N-1约束的多维空间中断面热稳定安全域边界的快速计算方法。首先,通过分析发电机组出力变化对断面各构成线路的功率传输转移分布因子(PTDF),解析在单一约束条件下机组出力与断面热稳定极限的数值关系;在此基础上提出了顶点搜索策略,形成参数全空间中断面热稳定安全域边界快速求解综合法。该方法结合解析分析和仿真计算两类方法的优点,能够发现参数空间中可能存在的全部热稳定极限约束,快速求得安全域边界的分段近似线性表达式,在多维参数空间中快速准确地刻画系统的安全运行边界。目前,该方法已在中国南方某电网运行方式计算中得到应用。
Abstract:
      The security region of power system can be shown with greater accuracy in multi-dimensional space since the distribution of power flow is complex in interconnected power grid and the factors that could have an influence on the maximum transfer power of a cross section are various, which shows the multi-dimensional character. On this basis, a rapid algorithm to determine the cross sectional thermal security region under the condition of the security N-1 criterion in multi-dimensional space is proposed. According to the calculation of power transfer distribution factor(PTDF)that reflects the influence of generator to transmission lines, the numerical relationship between generator and cross section limit of thermal stability with single constraint is analyzed. Furthermore, a rapid comprehensive algorithm of cross section thermal security region is proposed using the advantages of peak selection strategy, which is capable of seeking all the limit states of thermal stability in all parameter space as well as obtaining the piecewise linear approximation expression for the boundary of thermal security region by combining both advantages of numerical analysis and simulation and accurately calculating the operation boundary in control parameter space. So far, the proposed method has been applied in the operation mode analysis of a power grid in southern China.
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