| 引用本文: | 张 钢,宗启航,柯贤波,等.基于临界惯量和预想故障的含风电电力系统暂态功角稳定在线预警[J].电力系统保护与控制,2023,51(16):72-83. |
| ZHANG Gang,ZONG Qihang,KE Xianbo,et al.Online warning of transient power angle stability of power systems with wind power based on critical inertia and anticipated faults[J].Power System Protection and Control,2023,51(16):72-83 |
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| 摘要: |
| 大规模风电接入使得电力系统惯量水平降低，暂态功角失稳风险加剧，开展含风电电力系统故障前的暂态功角稳定在线预警对保障其安全稳定至关重要。提出了基于临界惯量和预想故障的含风电电力系统暂态功角稳定在线预警方法。首先，通过理论分析得到风电场在故障清除后短时间的功率恢复过程不能忽略的推论，并建立等效外特性模型，进而基于扩展等面积定则构建了计及风电场多阶段外特性的暂稳数学模型。其次，定义了含风电系统暂态功角稳定的临界等效惯量，并通过匀加速分段等效提出了实用化的求解方法，进一步提出了暂态临界惯量指数，实现稳定裕度量化分析并给出风险等级。最后，以含风电接入的四机两区域系统和IEEE39节点系统为例，仿真验证了所提方法的有效性和适用性。 |
| 关键词: 风电 暂态功角稳定 临界惯量 预想故障 在线预警 广域测量 |
| DOI：10.19783/j.cnki.pspc.221816 |
| 分类号: |
| 基金项目:国家自然科学基金项目“数据-知识融合驱动的低惯量电网频率稳定智能分析与控制理论及方法”资助(U22B20111)；国家电网公司总部科技项目“高比例新能源电力系统惯量和一次调频能力量化研究”资助(5100- 202255328A-2-0-YS) |
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| Online warning of transient power angle stability of power systems with wind power based on critical inertia and anticipated faults |
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ZHANG Gang1, ZONG Qihang2, KE Xianbo1, YAO Wei2, LI Tianqi3, WANG Jili1, CHENG Lin1, WEN Jinyu2
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1. Northwest Branch of State Grid Corporation of China, Xi' an 710048, China; 2. State Key Laboratory of Advanced
Electromagnetic Engineering and Technology (School of Electrical and Electronic Engineering, Huazhong University of Science
and Technology), Wuhan 430074, China; 3. C-EPRI Electric Power Engineering Company Limited, Beijing 102200, China
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| Abstract: |
| Large-scale wind power access reduces the inertia level of a power system and increases the risk of transient power angle instability. Carrying out online warning of transient power angle stability before faults in power systems with wind power is essential to ensure their safety and stability. An online early warning method for the transient power angle stability of power systems with wind power based on critical inertia and anticipated faults is proposed. First, a theoretical analysis is used to obtain the inference that the power recovery process of a wind farm cannot be neglected for a short period of time after fault clearance, and an equivalent external characteristic model is established. A mathematical model is constructed based on the extended equal area rule to take into account the multi-stage characteristics of wind farms. Second, the critical equivalent inertia of the transient power angle stability of power systems with wind power is defined, and a practical solution is proposed by means of uniformly accelerated segmental equivalence. A transient critical-inertia index is then proposed to quantify the stability margin analysis and give a risk rating. Finally, the validity and applicability of the proposed method is verified by simulation using a four-machine two-area system with wind power access and an IEEE39 system as examples. |
| Key words: wind power transient power angle stability critical inertia anticipated faults on-line warning wide area measurements |
