| 引用本文: | 李辉,王坤,刘海涛,宋二兵,谢翔杰,郑媚媚.交流励磁抽水蓄能机组变下垂系数调频控制策略[J].电力自动化设备,2018,(7): |
| LI Hui,WANG Kun,LIU Haitao,SONG Erbing,XIE Xiangjie,ZHENG Meimei.Variable droop coefficient frequency control strategy of AC excited pumped storage unit[J].Electric Power Automation Equipment,2018,(7): |
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| 摘要: |
| 针对固定下垂系数控制存在抑制频率波动的阻尼不足的问题，提出一种基于惯性环节的交流励磁抽水蓄能机组变下垂系数调频控制策略。首先，基于交流励磁抽水蓄能机组运行特点，分别建立了可逆水泵水轮机和交流励磁电机的数学模型以及交流励磁抽水蓄能机组控制模型；然后，考虑频率变化率和频率偏差值对系统频率动态调节影响，引入下垂系数-系统频率变化率(R-df/dt)函数，并通过检测电网频率变化和机组转速，获得幅值随频率变化率动态变化的下垂系数，基于此，提出一种基于惯性环节的变下垂系数调频控制策略，并给出了参数整定方法。基于MATLAB/Simulink平台，搭建含交流励磁抽水蓄能机组的电力系统3机仿真模型，并进行系统频率特性的仿真分析。仿真结果表明，所提控制策略可有效提升机组在发电、电动工况下的频率响应能力，提高了电力系统的频率稳定性。 |
| 关键词: 交流励磁抽水蓄能机组 变下垂系数 频率调节 频率变化率 |
| DOI：10.16081/j.issn.1006-6047.2018.07.009 |
| 分类号:TM712.3 |
| 基金项目:国家自然科学基金资助项目(51675354)；中央高校基本科研业务费专项资金资助项目(106112017CDJZR-PY0007) |
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| Variable droop coefficient frequency control strategy of AC excited pumped storage unit |
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LI Hui1, WANG Kun1, LIU Haitao1, SONG Erbing2, XIE Xiangjie1, ZHENG Meimei1
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1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China;2.State Grid Jibei Maintence Company, Beijing 102488, China
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| Abstract: |
| Regarding with the issue that the fixed droop coefficient control is insufficient to suppress the frequency fluctuation, an inertial link-based variable droop coefficient frequency control strategy of ACEPSU(AC Excited Pumped Storage Unit) is proposed. Based on the operation characteristics of ACEPSU, the models of reversible pump turbine, AC excited machine and control system of ACEPSU are established. Considering the influence of frequency change rate and frequency deviation on the system frequency regulation, an R-df/dt function is introduced. The droop coefficient that dynamically changes with the change of the frequency change rate is obtained according to the frequency change of the grid and the speed of the unit. On this basis, an inertial link-based variable droop coefficient frequency control strategy of ACEPSU is proposed, and the control parameter calculation method is also provided. Based on MATLAB/Simulink platform, a three-machine system model with ACEPSU is built, and the frequency response characteristics of power system are simulated. The simulative results show that the proposed control strategy can effectively enhance the frequency response ability of ACEPSU under both generating and motoring conditions, and improve the frequency stability of power system. |
| Key words: AC excited pump storage unit variable droop coefficient frequency modulation frequency change rate8 |
