| 引用本文: | 杨婷婷,徐永强,李浩千,等.一种考虑频率二次跌落的风火联合调频控制策略[J].电力系统保护与控制,2025,53(21):62-71.[点击复制] |
| YANG Tingting,XU Yongqiang,LI Haoqian,et al.A wind-thermal coordinated frequency regulation strategy considering secondary frequency drop[J].Power System Protection and Control,2025,53(21):62-71[点击复制] |
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| 摘要: |
| 随着风电在电力系统中占比的逐年攀升，传统机组单独承担调频任务已难以适应其需求变化。因此，风电需具备与传统电源协同调节系统频率的能力。首先，基于风电调频的快速性和火电调频的持久性，设计了一种以火电为主、风电为辅的联合一次调频控制策略。其次，充分考虑风电场内各机组的运行差异，提出一种基于裕度因子的功率分配策略，有效挖掘各机组的调频能力并确保其安全运行。同时，提出一种针对风电场内风机分组运行的持久备用功率再分配策略。该策略预先安排少数风电机组以低减载率的超速模式运行，当调频风机退出频率支撑后，减载风机将根据调频风机的转速，采用一种基于转速反比例因子的差异化能量分配策略，以有效弥补调频风机退出后的能量缺额，缓解频率二次跌落(secondary frequency drop, SFD)。仿真结果表明，所提策略能够实现风火联合参与一次调频，在保证经济性和可靠性的前提下，充分发掘风电调频性能，有效改善电力系统频率响应特性。 |
| 关键词: 风火联合 一次调频 裕度因子 低减载率 反比例因子 频率二次跌落 |
| DOI：10.19783/j.cnki.pspc.241506 |
| 投稿时间：2024-11-08修订日期：2025-02-14 |
| 基金项目:国家自然科学基金面上项目资助(52476009) |
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| A wind-thermal coordinated frequency regulation strategy considering secondary frequency drop |
| YANG Tingting1,XU Yongqiang1,LI Haoqian2,LIU Yu3,WU Xinyan1,LÜ You1 |
| (1. School of Control and Computer Engineering, North China Electric Power University, Beijing 102206, China;
2. Guoneng Guohua (Beijing) Cogeneration Power Co., Ltd., Beijing 100018, China;
3. North China Branch of State Grid Corporation of China, Beijing 100032, China) |
| Abstract: |
| With the increasing penetration of wind power in power systems, it has become challenging for traditional generation units alone to meet frequency regulation requirements. Therefore, wind power must be capable of coordinating with traditional power sources to jointly regulate system frequency. Based on the fast frequency response of wind power and the sustained regulation capability of thermal units, a coordinated primary frequency regulation strategy dominated by thermal units and supported by wind power is proposed. To account for the operational differences among wind turbines within a wind farm, a power distribution strategy based on a margin factor is proposed to effectively harness the frequency regulation potential of each turbine while ensuring safe operation. Meanwhile, a persistent reserve power re-distribution strategy for grouped wind turbine operation is developed. This strategy pre-schedules a small number of wind turbines to operate in overspeed mode with a low de-loading rate. When frequency-regulating wind turbines withdraw from frequency support, the de-loaded turbines compensate for the resulting energy deficit according to a differentiated energy allocation scheme based on an inverse rotor-speed factor. This approach effectively mitigates the secondary frequency dip (SFD). Simulation results demonstrate that the proposed strategy enables coordinated primary frequency regulation between wind and thermal units, fully exploits the frequency regulation capability of wind power, and significantly improves system frequency response performance while maintaining economic efficiency and reliability. |
| Key words: wind-thermal coordination primary frequency regulation margin factor low de-loading rate inverse proportional factor secondary frequency drop |
