| 引用本文: | 付亮,赵志高,杨建东,杨威嘉.兼顾超低频振荡阻尼特性的水电机组一次调频多目标优化策略[J].电力自动化设备,2020,40(6): |
| FU Liang,ZHAO Zhigao,YANG Jiandong,YANG Weijia.Multi-objective optimization strategy of primary frequency regulation for hydropower unit considering damping characteristics of ultra-low frequency oscillation[J].Electric Power Automation Equipment,2020,40(6): |
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| 摘要: |
| 针对水电高占比电网超低频振荡抑制需求及现有水电机组调速系统控制参数整定方法难以有效协调系统阻尼特性与一次调频动态性能之间矛盾关系的问题，提出一种兼顾阻尼特性的水电机组一次调频多目标优化策略。首先建立适用于小波动工况的水电机组调速系统模型，推导调速系统阻尼特性与振荡频率之间的关系表达式，引入用于协调水电机组阻尼特性和一次调频动态性能的多目标函数；然后采用预先处理和后处理相结合的约束处理策略对相应约束条件进行处理；最后采用多目标引力搜索算法对目标函数进行求解，并对非支配解集进行优选，得出水电机组在一次调频工况下的最优运行参数。仿真结果表明，采用所提策略得到的最佳兼容解能在避免一次调频被考核的同时，较好地提升调速系统在超低频段的阻尼水平，有利于抑制超低频振荡的发生。 |
| 关键词: 超低频振荡 一次调频 水电机组 阻尼特性 多目标优化 |
| DOI：10.16081/j.epae.202006010 |
| 分类号:TM712 |
| 基金项目:国家自然科学基金青年项目(51809197)；国家自然科学基金面上项目(51879200)；国家自然科学基金重点项目(51839008) |
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| Multi-objective optimization strategy of primary frequency regulation for hydropower unit considering damping characteristics of ultra-low frequency oscillation |
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FU Liang1, ZHAO Zhigao2, YANG Jiandong2, YANG Weijia2
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1.State Grid Hunan Electric Power Company Limited Research Institute, Changsha 410007, China;2.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
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| Abstract: |
| Aiming at the inhibition requirement of ultra-low frequency oscillation suppression in power grid with high proportion of hydropower and the problem that current control parameter setting method of speed regulation system of hydropower unit can hardly effectively coordinate the contradiction relationship between system damping characteristics and dynamic performance of primary frequency regulation, a multi-objective optimization strategy of primary frequency regulation for hydropower unit considering damping characteristics is proposed. Firstly, the speed regulation system model of hydropower unit suitable for small fluctuation condition is established, the relationship between damping characteristics of speed regulation system and oscillation frequency is derived, and the multi-objective functions are introduced to coordinate the damping characteristics of hydropower unit and dynamic performance of primary frequency regulation. Secondly, the corresponding constraints are dealt with the combination of pre-processing and post-processing. Finally, MOGSA(Multi-Objective Gravitational Search Algorithm) is used to solve the objective functions, and the non-dominated solution set is optimized to obtain the optimal operation parameters of hydropower unit under primary frequency regulation condition. The simulative results show that the optimum compatible solution obtained by the proposed strategy can not only better improve the damping level of speed regulation system in ultra-low frequency period but also avoid the check of primary frequency regulation, which is beneficial to suppress ultra-low frequency oscillation. |
| Key words: ultra-low frequency oscillation primary frequency regulation hydropower unit damping characteristics multi-objective optimization |
