交⁃直⁃交异步系统准同步控制下直流动态功频响应特性分析  

Analysis on Characteristics of DC Dynamical Power and Frequency Response for AC-DC-AC Asynchronous-interconnection System Under Quasi-synchronous Control

作　　者：李崇涛[1] 陈亦平[2] 杨若朴 杨荣照 黄济宇 肖逸 LI Chongtao;CHEN Yiping;YANG Ruopu;YANG Rongzhao;HUANG Jiyu;XIAO Yi(School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Power Dispatching and Control Center of China Southern Power Grid,Guangzhou 510663,China;Electric Power Research Institute of China Southern Power Grid Company Limited,Guangzhou 510663,China)

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049 [2]中国南方电网电力调度控制中心,广东省广州市510663 [3]南方电网科学研究院有限责任公司,广东省广州市510663

出　　处：《电力系统自动化》2024年第16期59-67,共9页Automation of Electric Power Systems

基　　金：国家重点研发计划资助项目(2022YFB2403500);中国南方电网有限责任公司科技项目(ZDKJXM20210034)。

摘　　要：经直流输电互联的异步系统通过对直流输电实施附加控制,可实现异步系统的准同步运行,达到实时共享异步系统调频资源的目的。但在准同步控制的工程实践中,不合理的控制结构或参数配置将导致系统出现非预期的功率波动。首先,根据直流准同步附加控制,构建准同步系统的动态功频响应分析模型;然后,基于该模型分析了直流控制参数对功率振荡的影响;进而,分析准同步控制导致的功率波动与传统功角振荡的异同;最后,以准同步实验过程中出现的功率波动为例进行分析验证,提出抑制直流功率波动的建议,并对准同步控制进行了讨论。The asynchronous system interconnected by DC transmission can realize quasi-synchronous operation of the asynchronous system and achieve the goal of real-time sharing of frequency regulation resources by implementing additional control on the DC transmission.However,in the engineering practice of quasi-synchronous control,unreasonable control structure or parameter configuration can lead to unexpected power fluctuations in the system.First,a dynamical power and frequency response analysis model of the quasi-synchronous system is constructed based on the additional quasi-synchronous DC control.Then,the influence of DC control parameters on power oscillations is analyzed based on this model.Furthermore,the similarities and differences between power fluctuations caused by quasi-synchronous control and traditional angle oscillations are analyzed.Finally,the analysis and verification are conducted by using the power fluctuations that occurred during the quasi-synchronous experiment process,and recommendations for suppressing DC power fluctuations are proposed,along with a discussion on quasi-synchronous control.

关 键 词：异步互联系统 准同步运行 动态功频响应 直流联络线 频率控制 功率振荡 

分 类 号：TM721.3[电气工程—电力系统及自动化]