• 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 (9): 30-34.doi: 10.3969/j.issn.1000-7229.2015.09.005

• 特高压直流输电技术专辑 • 上一篇    下一篇

背靠背高压直流系统稳态运行参数计算

李鹏,温渤婴   

  1. 中国农业大学信息与电气工程学院,北京市 100083
  • 出版日期:2015-09-01
  • 作者简介:李鹏(1990),男,硕士研究生,研究方向为电力系统稳定与控制、高压直流输电; 温渤婴(1958),男,教授,博士生导师,研究方向为电力系统稳定与控制、高压直流输电、继电保护与控制等。

Steady-State Operation Parameters Calculation of Back-to-Back HVDC System

LI Peng, WEN Boying   

  1. College of Information and Electrical Engineering, China Agricultural University, Beijing 100083, China
  • Online:2015-09-01

摘要:

稳态运行参数计算是背靠背高压直流系统设计过程中的重要环节。首先对背靠背高压直流系统稳态运行参数计算模块中所采用的计算模型、控制策略进行总结和介绍,然后据此制定具体的计算流程;针对直流系统处于低功率运行时,需要调整稳态运行参数使换流器参与交直流系统间无功功率平衡控制的问题,在对背靠背换流站内熄弧角与其他各稳态运行参数之间函数关系进行讨论的基础上,提出采用二分法迭代求解直流系统低功率运行时,满足站内无功功率平衡约束的稳态运行参数。最后以高岭背靠背直流工程为实例,验证本文所列算法的正确性和有效性,该算法可以用于今后背靠背高压直流系统的成套设计中。

关键词: 背靠背高压直流系统, 稳态运行参数, 二分法, 无功功率, 控制策略

Abstract:

The calculation of steady-state operation parameters plays an important role in the design process of back-to-back HVDC system. First of all, an explicit elaboration of the calculation model and control strategy used in the calculation of steady-state operation parameters was proposed, and then the calculation process was formulated based on these conditions. When HVDC system was operated in low power transmission, the operation parameters should be adjusted in order to engage converter in the balance control of reactive power between AC and DC systems. According to this problem, based on the discussion of the relationships among extinction angle and other steady-state operation parameters in back-to-back convertor station, an effective method of dichotomy iteration was put forward to solve the steady-state operation parameters that could meet the reactive power balance constraints during DC system low power operation. Finally, Gaoling back-to-back HVDC system was utilized to verify the correctness and effectiveness of this proposed algorithm. The result shows that this algorithm can be used in the packaged design of back-to-back HVDC system in the future.

Key words: back-to-back HVDC system, steady-state operation parameters, dichotomy, reactive power, control strategy

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