| 引用本文: | 盛举,贾庆岩,孙建军,查晓明.基于多尺度形态学滤波的火电机组一次调频控制方法[J].电力自动化设备,2022,42(2): |
| SHENG Ju,JIA Qingyan,SUN Jianjun,ZHA Xiaoming.Primary frequency regulation control method of thermal power unit based on multi-scale morphological filter[J].Electric Power Automation Equipment,2022,42(2): |
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| 摘要: |
| 高比例新能源并网给电力系统的频率稳定带来了严峻的挑战。相比风光储等并网新能源，火电机组惯量更大，一次调频可挖掘潜力更大。根据机组惯性作用、一次调频、二次调频的不同响应时间尺度，基于多尺度形态学滤波方法对火电机组一次调频负反馈通道的频率信号进行快速分解，通过对各频段信号设置合理的调差系数，实现分频段调频控制，并有效提高机组对全频段功率波动的频率调节能力。在MATLAB/Simulink中搭建含风、水、火电的电力系统调频模型，多场景下仿真结果表明该方法可以明显提高系统一次调频能力，改善系统频率概率分布，从而促进风电消纳。 |
| 关键词: 一次调频 火电机组 负荷波动 风电波动 多尺度形态学滤波器 |
| DOI：10.16081/j.epae.202111002 |
| 分类号:TM761+.2 |
| 基金项目:国家自然科学基金资助项目(51777145)；国网湖北省电力有限公司科技项目(52153218003J) |
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| Primary frequency regulation control method of thermal power unit based on multi-scale morphological filter |
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SHENG Ju1, JIA Qingyan2, SUN Jianjun1, ZHA Xiaoming1
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1.School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China;2.Electric Power Research Institute of State Grid Hubei Electric Power Co.,Ltd.,Wuhan 430077, China
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| Abstract: |
| The high proportion of new energy connected to the grid brings severe challenges to the frequency stability of power systems. Compared with the grid-connected new energy sources such as wind, photovoltaic and energy storage, thermal power unit has larger inertia and can tap more potential of primary frequency regulation. According to the different response time scales of unit inertia, primary frequency regulation and secondary frequency regulation, the frequency signal of negative feedback channel of primary frequency regulation of thermal power unit is decomposed based on multi-scale morphological filtering method. By setting reasonable regulation coefficient for each frequency band signal, the frequency regulation control in different frequency ranges is realized, and the ability of unit to adjust the frequency regulation of power fluctuations in the entire frequency range is effectively improved. The frequency regulation model of power system including wind, water and thermal power is built on MATLAB/Simulink. The simulative results in multiple scenarios show that the method can significantly improve the primary frequency regulation ability of the system, improve the probability distribution of system frequency, so that promoting the accommodation of wind power. |
| Key words: primary frequency regulation thermal power unit load fluctuation wind power fluctuation multi-scale morphological filter |
