| 引用本文: | 李佩杰,韩佩卓,赵晓慧.计及智能电动机负荷动态频率响应的频率安全校核优化[J].电力系统保护与控制,2025,53(21):94-108.[点击复制] |
| LI Peijie,HAN Peizhuo,ZHAO Xiaohui.Frequency security assessment and optimization considering dynamic frequency response of motor smart loads[J].Power System Protection and Control,2025,53(21):94-108[点击复制] |
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| 摘要: |
| 为确保频率安全校核对发电机出力计划调整的公平性和经济性，提出考虑智能电动机负荷动态频率响应的频率安全校核优化模型。该模型使用优化方法对发电机出力计划进行频率安全校核，并给出最优调整方案。为准确表达系统频率稳定约束，该模型引入全动态频率响应模型，建立事故前发电机出力与频率动态特性之间的联系，并跟踪调频过程中各发电机组频率的动态变化来限制频率最低点。同时，建立智能电动机负荷动态频率响应模型，模拟一次调频期间智能电动机负荷的动态频率特性。相较于传统负荷模型仅考虑普通电动机负荷的静态频率特性，该模型能解决负荷侧动态频率响应被忽略而导致的频率安全校核结果过于保守的问题。WSCC 3机9节点系统和新英格兰10机39节点系统的仿真结果表明，所提频率安全校核优化模型能同时兼顾安全性和经济性，且能够利用智能电动机负荷的动态频率响应有效缓解发电侧的调频负担。 |
| 关键词: 频率安全校核 智能电动机负荷 一次调频 动态频率响应 |
| DOI：10.19783/j.cnki.pspc.241510 |
| 投稿时间：2024-11-11修订日期：2025-05-02 |
| 基金项目:国家自然科学基金项目资助(52267006)；广西创新驱动发展专项资金项目资助(桂科AA19254034) |
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| Frequency security assessment and optimization considering dynamic frequency response of motor smart loads |
| LI Peijie1,HAN Peizhuo1,ZHAO Xiaohui2 |
| (1. Guangxi Key Laboratory of Power System Optimization and Energy Technology (Guangxi University), Nanning 530004, China;
2. School of Physics and Electronic Information, Guangxi Minzu University, Nanning 530006, China) |
| Abstract: |
| To ensure fairness and economic efficiency in generator output schedule adjustments during frequency security assessment, a frequency security assessment and optimization model considering the dynamic frequency response of motor smart loads is proposed in this paper. The model employs an optimization-based approach to assess the frequency security of generator output schedules and provides the optimal adjustment scheme. To accurately represent the frequency stability constraints, a full dynamic frequency response model is introduced to establish the relationship between the pre-contingency generator outputs and frequency dynamic characteristics, while tracking the dynamic frequency response of each unit during the frequency regulation process to limit the frequency nadir. At the same time, a dynamic frequency response model of motor smart loads is established to capture their dynamic characteristics during primary frequency regulation. Compared with the traditional static load models that only consider the static frequency characteristics of conventional motor loads, the proposed model mitigates the overly conservative results caused by neglecting load-side dynamic frequency response. Simulation results based on the WSCC 3-machine 9-bus system and the New England 10-machine 39-bus system show that the proposed frequency security assessment and optimization model achieves a balance between security and economy while effectively alleviating the frequency regulation burden on the generation side by leveraging the dynamic frequency response of motor smart loads. |
| Key words: frequency security assessment motor smart load primary frequency regulation dynamic frequency response |
