异步联网条件下直流调制对电网频率特性的影响  

Influence of DC Modulation on Frequency Characteristics of Power Grid under Asynchronous Networking

作　　者：周鑫 和鹏 何鑫 Zhouxin;Hepeng;Hexin(Yunnan Electric Power Research Institute,Kunming 650217)

机构地区：[1]云南电网有限责任公司电力科学研究院,昆明650217

出　　处：《云南电力技术》2021年第4期61-67,共7页Yunnan Electric Power

摘　　要：随着高压直流输电技术在大功率、远距离输电上的应用,可以实现各区域电网之间的非同步运行,但异步联网条件下区域电网的频率稳定性问题比较突出,成为影响电网安全稳定运行的重要因素。本文基于直流潮流法,同时考虑原动机调速器及直流附加频率控制器的作用,以解析的形式推导出异步联网下电网的频率响应,研究了直流调制参与调频对电网频率稳、动态特性的影响。最后,选取云广直流中的楚穗直流线对本文所提方法进行仿真验证。本文以解析的形式研究了异步联网条件下直流调制参与调频对频率变化特性的影响,为大规模互联电网的频率稳定性的研究提供了一种有效的方法。With the application of high-voltage direct current(HVDC)transmission technology in high-power and long-distance transmission,it is possible to achieve asynchronous operation between the regional power grids.However,the frequency stability of the regional power grid under the condition of asynchronous networking is more prominent,and it has become an impact on the safe and stable operation of the power grid.Important factors.This paper is based on DC power flow method,taking into account the role of governor of the prime mover and DC additional frequency controller,and deducing the frequency response of the power grid under the asynchronous network in the form of analytic,and studying the stability and dynamic characteristics of the grid frequency when DC modulation participates in frequency modulation.Finally,the Chusui DC line in Yun-Guang DC was selected to verify the proposed method.In this paper,the influence of DC modulation on the characteristics of frequency changes under the condition of asynchronous networking is studied in order to provide an effective method for the study of the frequency stability of large-scale interconnected power grids.

关 键 词：异步联网 频率特性 直流潮流 直流功率调制 

分 类 号：TM74[电气工程—电力系统及自动化]