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电网安全全国重点实验室(中国电力科学研究院有限公司),北京市 100192
徐式蕴(1985—),女,博士,教授级高级工程师,主要研究方向:电力系统稳定分析与控制。E-mail:xushiyun@epri.sgcc.com.cn
高雪峰(2000—),女,通信作者,硕士研究生,主要研究方向:电力系统稳定分析与控制。E-mail:gxf842657913@163.com
李宗翰(1993—),男,博士,主要研究方向:电力系统稳定分析与控制。E-mail:lzh624218372@163.com
收稿:2023-11-19,
修回:2024-02-27,
网络出版:2024-06-14,
纸质出版:2025-04-25
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徐式蕴,高雪峰,李宗翰等.计及功角摇摆和新能源切换特性的暂时工频过电压机理分析[J].电力系统自动化,2025,49(8):129-137.
XU Shiyun,GAO Xuefeng,LI Zonghan,et al.Mechanism Analysis of Temporary Power Frequency Overvoltage Considering Rotor Angle Swinging and Renewable Energy Switching Characteristics[J].Automation of Electric Power Systems,2025,49(8):129-137.
徐式蕴,高雪峰,李宗翰等.计及功角摇摆和新能源切换特性的暂时工频过电压机理分析[J].电力系统自动化,2025,49(8):129-137. DOI: 10.7500/AEPS20231119001.
XU Shiyun,GAO Xuefeng,LI Zonghan,et al.Mechanism Analysis of Temporary Power Frequency Overvoltage Considering Rotor Angle Swinging and Renewable Energy Switching Characteristics[J].Automation of Electric Power Systems,2025,49(8):129-137. DOI: 10.7500/AEPS20231119001.
高比例新能源电力系统的暂时工频过电压问题是影响系统安全、制约新能源消纳的关键因素。为了揭示暂时工频过电压机理,首先,搭建了新能源接入两机等值系统的准稳态模型,并利用电压相量关系解析得到新能源机端电压峰值;然后,采用全微分法分析了新能源电流与其机端电压的关联关系,并阐明了无功补偿和功角摇摆对机端电压的影响机理;进一步,以预设最大峰值为边界条件,提出了新能源电流和无功补偿上限的优化建议,为大规模复合能源外送场景下新能源安全可靠送出提供基础理论支撑;最后,采用光伏火电打捆系统和实际复合能源送端系统进行仿真,验证了理论分析的有效性。
Temporary power frequency overvoltage in power systems integrated with high proportion of renewable energy is a key factor that affects the system security and restricts the renewable energy consumption. To reveal the overvoltage mechanism for the temporary power frequency
firstly
a quasi-steady-state model for a two-machine equivalent system integrated with renewable energy is built
and the peak value of the terminal voltage of renewable energy is analytically obtained based on the phasor relationship. Secondly
employing the total differential method
the relevant relationship between the terminal voltage and the current of renewable energy is analyzed
and the influence mechanism of reactive power compensation and rotor angle swinging on the terminal voltage is clarified. Furthermore
taking the preset maximum peak value as the boundary
the optimization suggestions for the current and the upper reactive power compensation limit are proposed to provide the basic theoretical support for the safe and reliable transmission of renewable energy in large-scale composite energy transmission scenarios. Finally
the photovoltaic-thermal power bundling system and the actual composite energy sending-end system are used to carry out the simulation
and the effectiveness of the theoretical analysis is verified.
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