| 引用本文: | 李志军,王 硕,张家安,等.基于变论域模糊逻辑的互联电力系统负荷频率控制[J].电力系统保护与控制,2021,49(16):151-160.[点击复制] |
| LI Zhijun,WANG Shuo,ZHANG Jiaan,et al.Variable universe fuzzy logic-based load frequency control in an interconnected power system[J].Power System Protection and Control,2021,49(16):151-160[点击复制] |
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| 摘要: |
| 随着风电在电力系统中的渗透率不断提高，其出力不确定性对系统频率稳定造成威胁。针对风电接入系统后的频率波动问题，提出变论域模糊PI负荷频率控制策略。为克服传统模糊控制器由于论域固定导致自适应能力有限的缺点，设计的变论域模糊PI负荷频率控制器通过变论域方法实现输入、输出论域的动态调整。为满足风电接入系统后复杂的论域调整需求，基于模糊推理设计新型变论域伸缩因子。典型两区域互联系统仿真实验表明，在不同形式的扰动下，该新型控制器较PI控制器、模糊PI控制器有更好的控制表现，能更好地处理风电出力不确定性对互联电力系统频率稳定的影响。 |
| 关键词: 负荷频率控制 变论域 模糊逻辑 风电 互联电力系统 |
| DOI：DOI: 10.19783/j.cnki.pspc.201255 |
| 投稿时间：2020-10-17修订日期：2021-01-08 |
| 基金项目:河北省科技支撑计划项目资助(15212105D) |
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| Variable universe fuzzy logic-based load frequency control in an interconnected power system |
| LI Zhijun,WANG Shuo,ZHANG Jiaan,YIN Qibing,YE Chao |
| (School of Artificial Intelligence and Data Science, Hebei University of Technology, Tianjin 300130, China) |
| Abstract: |
| With the penetration of wind power in the power system constantly increasing, the uncertainty of its output poses a threat to the frequency stability of the system. Given this fluctuation problem of wind power connected to an interconnected power system, a variable universe fuzzy PI load frequency control strategy is proposed. To overcome the limitation in adaptive ability of the traditional fuzzy controller due to the fixed universe, a designed variable universe fuzzy PI load frequency controller realizes the dynamic adjustment of the input and output universes by the method of the variable universe. To satisfy the complex demands of universe adjustment after wind power is connected to the system, a new variable universe contraction-expansion factor based on fuzzy inference is designed. Simulation results of a typical two-area interconnected system show that the new controller has better control performance than the PI controller and the fuzzy PI controller under different forms of disturbance. It can better deal with the effect of the uncertainty of wind power output on the frequency stability of an interconnected power system.
This work is supported by the Foundation of the Hebei Provincial Technology Support Program (No. 15212105D). |
| Key words: load frequency control (LFC) variable universe fuzzy logic wind power interconnected power system |
