• 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 ›› 2015, Vol. 36 ›› Issue (3): 65-70.doi: 10.3969/j.issn.1000-7229.2015.03.011

• 输配电技术 • 上一篇    下一篇

基于暂态电压扰动范围判别的自适应低压减载策略

刘巍1,李晔2,张保会2,雷俊哲1   

  1. 1.国网河南省电力公司电力科学研究院,郑州市 450052;2.西安交通大学电气工程学院,西安市 710049
  • 出版日期:2015-03-01
  • 作者简介:刘巍(1977),女,高级工程师,硕士,主要从事电力系统安全稳定控制和电力系统风险管理等方面研究工作; 李晔(1990),男,硕士研究生,本文通讯作者,主要研究方向为电力系统电压稳定性控制; 张保会(1953),男,教授,博士生导师,主要研究方向为电力系统继电保护,安全稳定控制和电力系统通信等; 雷俊哲(1984),男,工程师,硕士,主要从事电力系统安全稳定控制和电力系统风险管理等方面的研究工作。

Adaptive Undervoltage Load Shedding Strategy Based on Disturbance Scale Discrimination of Transient Voltage

LIU Wei1, LI Ye2, ZHANG Baohui2, LEI Junzhe1   

  1. 1. State Grid Henan Electric Power Research, Zhengzhou 450052, China; 2. School of Electrical Engineering, Xi’an Jiaotong
    University, Xi’an 710049, China
  • Online:2015-03-01

摘要:

传统低压减载方案仅根据本地电压信息动作,未考虑全网暂态电压响应特征。分析系统暂态电压跌落与扰动范围的关系,并基于负荷节点的电压偏移量提出暂态电压扰动范围判别指标,将电压扰动类型划分为全网暂态电压扰动和局部暂态电压扰动。以该指标的判别结果为基础,综合考虑扰动后系统电压与频率的动态过程,构建基于暂态电压扰动范围判别的自适应低压减载策略,该策略采用2套自适应减载方案分别应对全网暂态电压扰动和局部暂态电压扰动。对IEEE 39节点系统的仿真结果验证了该策略在应对不同失稳场景时的有效性和优越性。

关键词: 电压稳定性, 扰动范围, 切负荷, 频率动态, 自适应控制

Abstract:

Conventional  undervoltage load shedding(UVLS) scheme only focuses on local voltages without considering the response characteristics of transient voltage in whole gird. This paper analyzed the relationship between transient voltage drops and disturbance scale, proposed discriminant index for the disturbance scale of transient voltages based on the offset of voltage drops, and divided the transient voltage disturbance into two categories: the whole-grid transient voltage disturbance and the partial-region transient voltage disturbance. On the basis of the discriminant index results, an adaptive UVLS strategy based on the disturbance scale discrimination of transient voltages was constructed, with consideration on the dynamic process of voltage and frequency after the disturbance, which could solve the whole-grid transient voltage disturbance and the partial-grid transient voltage disturbance respectively with two adaptive load shedding schemes. Finally, the effectiveness and superiority of this strategy in different instability scenarios were verified by the simulation on the IEEE 39-bus system.

Key words: voltage stability, disturbance scale, load shedding, dynamic frequency, adaptive control