| 引用本文: | 朱元振,苗伟威,鲍冠南,赵桂芳.基于风电可用转子动能评估的频率支撑需求优化分配策略[J].电力系统保护与控制,2025,53(12):94-103.[点击复制] |
| ZHU Yuanzhen,MIAO Weiwei,BAO Guannan,ZHAO Guifang.Optimal allocation strategy of frequency support demand based on assessing wind power available rotor kinetic energy[J].Power System Protection and Control,2025,53(12):94-103[点击复制] |
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| 摘要: |
| 随着风电在电力系统中的占比不断提高，同步机惯量和调频能力不断降低，风电提供频率支撑是保证电力系统安全运行的必然选择。然而，风电天然的出力波动特性决定了其频率支撑能力时变，加之系统在不同运行方式下的频率支撑需求不同，如何在不同系统运行方式下为不同频率支撑能力的风电机组分配频率支撑需求成为一项难题。提出一种基于风电可用转子动能评估的频率支撑需求优化分配策略。在风电机组采用释放转子动能方式提供频率支撑的场景下，首先基于其风电功率捕获特性解析推导了频率支撑期间的风能损失，得到了风电可用转子动能的精确表征方法。然后，结合电网实际运行场景，基于系统频率安全判据，提出了一种系统对风电频率支撑总体需求的评估方法。最后，以风能损失最小为目标，提出了频率支撑需求在风电机组间的优化分配策略。仿真结果表明，所提方法能够在保证系统频率安全的同时，显著降低风电频率支撑期间的风能损失。 |
| 关键词: 风电 可用转子动能 频率支撑能力 风能损失 优化分配 |
| DOI：10.19783/j.cnki.pspc.241165 |
| 投稿时间：2024-08-30修订日期：2024-11-20 |
| 基金项目:国家自然科学基金项目资助(U22B20101)；国网山东省电力公司科技项目资助(2023A-006) |
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| Optimal allocation strategy of frequency support demand based on assessing wind power available rotor kinetic energy |
| ZHU Yuanzhen1,MIAO Weiwei2,BAO Guannan2,ZHAO Guifang3 |
| (1. Electric Power Research Institute of State Grid Shandong Electric Power Company / Shandong Smart Grid Technology
Innovation Center, Jinan 250000, China; 2. Power Dispatch Control Center, State Grid Shandong Electric Power Company,
Jinan 250000, China; 3. School of Electrical Engineering, Shandong University, Jinan 250061, China) |
| Abstract: |
| As the penetration of wind power in power systems continues to rise, the inertia and frequency regulation capability provided by synchronous machines are gradually diminishing. This makes frequency support from wind power a necessary measure to ensure the secure operation of power systems. However, due to the inherent variability of wind power output, its frequency support capacity is time-varying. In addition, frequency support requirements differ under various system operating conditions, making it challenging to allocate frequency support tasks for wind turbines with different support capabilities under different scenarios. This paper proposes an optimal allocation strategy for frequency support requirements based on the evaluation of the available rotor kinetic energy of wind power. In scenarios where wind turbines release stored rotor kinetic energy to provide frequency support, an analytical expression for wind energy loss during frequency support is derived first based on the wind power capture characteristics, allowing accurate quantification of the available rotor kinetic energy. Subsequently, considering the actual power system operation conditions and system frequency security criteria, a method is proposed to assess the overall frequency support requirement for wind power. Finally, with the goal of minimizing wind energy loss, an optimal allocation strategy for frequency support demand among wind turbines is proposed. Simulation results show that the proposed method significantly reduces wind energy loss during frequency support while ensuring system frequency security. |
| Key words: wind power available rotor kinetic energy frequency support capacity wind energy loss optimal allocation |
