| 基于在线负荷检测的变电站低频减载方案 |
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| 引用本文： | 熊小伏,李东晋. 基于在线负荷检测的变电站低频减载方案[J]. 电力自动化设备, 2011, 31(9): 32-35 |
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| 作者姓名： | 熊小伏 李东晋 |
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| 作者单位： | 重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆,400044 |
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| 基金项目： | 国家自然科学基金资助项目(50777068);重庆大学输配电国家重点实验室资助项目(2007DA10512709202) |
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| 摘 要： | 对电力系统低频减载进行了深入研究,为了避免现有减载方法通过预先设定减载对象和减载顺序而不管该对象减载时刻的实际负载水平从而导致的减载量不足,提出了基于在线负荷检测的低频减载思路.负载线路的实际负荷量可由自动化系统得到.通过对电力系统频率动态特性的分析,得出了频率变化率与系统功率缺额之间的关系及保证首轮减载量对系统频率恢...
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| 关 键 词： | 变电站 减载 低频减载 动态特性 在线系统 电力负荷 检测 恢复速度 |
Under-frequency load shedding based on online load detection for electric substations |
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| XIONG Xiaofu and LI Dongjin. Under-frequency load shedding based on online load detection for electric substations[J]. Electric Power Automation Equipment, 2011, 31(9): 32-35 |
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| Authors: | XIONG Xiaofu and LI Dongjin |
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| Affiliation: | State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University,Chongqing 400044,China;State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing University,Chongqing 400044,China |
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| Abstract: | The concept of UFLS (Under-Frequency Load Shedding) based on online load detection is proposed. The actual load of the line is acquired from the automation system. The frequency dynamics of power system are analyzed,the relationship between the rate of frequency change and the system power gap is obtained and the importance of UFLS amount in first step on system frequency recovery is emphasized. A substation UFLS scheme based on online load detection is proposed,which takes the UFLS amount in first step as the objective,sets the threshold of load shedding line and arranges the load shedding line queue according to the real-time line loads for ensuring the UFLS amount in first step to improve the speed of frequency recovery. Results of Matlab simulation show its effectiveness. |
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| Keywords: | electric substations electric load shedding under-frequency load shedding dynamic characteristics online systems electric loads detection recovery speed |
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