• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2016, Vol. 37 ›› Issue (7): 141-148.doi: 10.3969/j.issn.1000-7229.2016.07.020

• 输配电技术 • 上一篇    

考虑继电保护故障的输电线路风险评估体系

龚庆武,林燕贞   

  1. 武汉大学电气工程学院,武汉市 430072
  • 出版日期:2016-07-01
  • 作者简介:龚庆武(1967),男,教授,博士生导师,研究方向为电力系统运行与控制、优化调度等; 林燕贞(1991),女,硕士研究生,研究方向为电力系统继电保护风险评估。
  • 基金资助:
    国家科技支撑计划资助项目(2013BAA02B01)

Risk Assessment System of Transmission Line Considering Relay Protection Fault

GONG Qingwu,LIN Yanzhen   

  1. School of Electrical Engineering, Wuhan University, Wuhan 430072, China
  • Online:2016-07-01
  • Supported by:
    Project supported by the National Science and Technology Support Program(2013BAA02B01)

摘要: 输电线路在电网中承担着输送和分配电能的作用,其发生故障会给电网运行带来巨大影响,该文提出了一种综合考虑输电线路本身以及线路保护的风险评估体系。利用牛顿同伦算法估计威布尔分布参数,构建继电保护故障率模型;采用效用函数从切负荷损失、线路过负荷损失以及电压越限损失3个指标出发构建严重度模型;利用风险定义计算考虑继电保护设备故障的输电线路的风险,扫描电网的薄弱环节,为制定差异化运维策略提供理论依据。最后以WSCC-9电力系统经典算例为例,进行相关计算仿真,验证了考虑输电线路保护故障特性的电网综合风险评估体系的有效性和实用性。

关键词: 输电线路, 继电保护设备, 牛顿同伦算法, 威布尔分布, 效用函数

Abstract: The transmission line plays a role of power transmission and distribution function in the power grid, whose failure will bring enormous influence on the operation of power grid. This paper proposes a risk assessment system with comprehensively considering the transmission line and line protection. We use Newton-Homotopy algorithm to estimate the parameters of Weibull distribution and construct the fault rate model of relay protection; adopt utility function to construct the model of severity including the loss of load, line overload and voltage limit; and use the definition of risk to calculate the risk of transmission line under relay protection equipment fault, scan the weakness of grid, and provide theoretical basis for setting the differential operation strategy. Finally, the calculation and simulation results of the WSCC-9 test system verify the correctness and efficiency of the comprehensive risk assessment system of grid with considering the protection fault characteristics of transmission line.

Key words: transmission line, relay protection equipment, Newton-Homotopy algorithm, Weibull distribution, utility function

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