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OA北大核心CSTPCD
Analysis on Characteristics of DC Dynamical Power and Frequency Response for AC-DC-AC Asynchronous-interconnection System Under Quasi-synchronous Control
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.
李崇涛;陈亦平;杨若朴;杨荣照;黄济宇;肖逸
西安交通大学电气工程学院,陕西省西安市 710049中国南方电网电力调度控制中心,广东省广州市 510663南方电网科学研究院有限责任公司,广东省广州市 510663
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
asynchronous-interconnection systemquasi-synchronous operationdynamical power and frequency responseDC tie-linefrequency controlpower oscillation
《电力系统自动化》 2024 (016)
59-67 / 9
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). This work is supported by National Key R&D Program of China(No.2022YFB2403500)and China Southern Power Grid Company Limited(No.ZDKJXM20210034).
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