1.西南交通大学 电气工程学院,四川 成都 610031
2.云南电网有限责任公司电力科学研究院,云南 昆明 650217
3.云南电力试验研究院(集团)有限公司,云南 昆明 650217
高 原(1993 —),男,四川德阳人,硕士研究生,主要研究方向为电力系统稳定与控制、电力系统频率动态(E-mail:646689045@qq.com);
马宁宁(1987 —),男,山东泰安人,博士研究生,通信作者,研究方向为电力系统频率动态、扰动传播、风力发电等(E-mail:mnsdxt@163.com);
王德林(1970 —),男,河南安阳人,副教授,博士研究生导师,博士,研究方向为电力系统机电动态、扰动传播、频率稳定与控制、连续体建模、风力发电等(E-mail:dlwang@swjtu.cn)。
收稿:2018-10-11,
修回:2019-08-16,
纸质出版:2019-09-10
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高原,马宁宁,王德林等.异步联网下直流频率调制及其参数对送端系统频率的影响[J].电力自动化设备,2019,39(09):173-179.
GAO Yuan,MA Ningning,WANG Delin,et al.Impact of DC frequency modulation and modulation parameters on frequency characteristics of sending end in asynchronous interconnected power grid[J].Electric Power Automation Equipment,2019,39(09):173-179.
高原,马宁宁,王德林等.异步联网下直流频率调制及其参数对送端系统频率的影响[J].电力自动化设备,2019,39(09):173-179. DOI: 10.16081/j.epae.201909053.
GAO Yuan,MA Ningning,WANG Delin,et al.Impact of DC frequency modulation and modulation parameters on frequency characteristics of sending end in asynchronous interconnected power grid[J].Electric Power Automation Equipment,2019,39(09):173-179. DOI: 10.16081/j.epae.201909053.
考虑原动机调速器及直流频率调制的作用,基于直流潮流法以解析形式推导出在直流频率调制影响下送端系统的频率响应以及调频系统的阻尼比,并在此基础上研究了直流频率调制参与调频及其调频参数对送端系统频率动态特性的影响。最后,分析了异步联网条件下直流频率调制在参与含水电机组的送端系统中,对系统频率变化特性的影响。选取实际云南电网楚穗直流输电工程对所提方法进行仿真,仿真结果验证了直流频率调制抑制送端系统扰动频率峰值的有效性,同时证明了其参与水电调频后可以维持送端系统频率的稳定性。
Based on DC(Direct Current) load flow method,the analytical expression of frequency response in sending end and damping ratio in FM(Frequency Modulation) system under the impact of DC FM are deduced in consideration of the function of hydro-turbine governor and DC FM. Then the frequency dynamic characteristics of sending end are studied,when the DC FM and the FM parameters is involved. Finally,the impact of DC FM on frequency changing characteristics in sending end with hydroelectric generators is analyzed under the asynchronous grid interconnection condition. A test system of Chuxiong-Suidong DC transmission project is established,which the simulative result verifies that DC FM method can not only suppress the peak disturbance frequency of the sending end effectively,but also maintain the frequency stability of sending end after participating in hydropower system FM.
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