| 引用本文: | 祝翰兴,叶 华,高 磊.基于振荡能量消耗的发电机阻尼评估方法[J].电力系统保护与控制,2021,49(24):41-50.[点击复制] |
| ZHU Hanxing,YE Hua,GAO Lei.Generator damping evaluation method based on oscillation energy consumption[J].Power System Protection and Control,2021,49(24):41-50[点击复制] |
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| 摘要: |
| 为了准确评估多机电力系统中发电机的阻尼特性，提出了一种基于发电机振荡能量消耗的阻尼评估方法。首先，推导了基于6阶电气参数模型发电机的振荡能量流的表达式，克服了现有基于4阶电气参数模型的振荡能量流存在保守性的不足。其次，建立了基于振荡能量消耗的模式阻尼贡献指标，提出了基于发电机响应和特征值/特征向量的指标计算方法，评估了多机系统中发电机的阻尼特性。模式阻尼贡献指标物理意义明确，所有发电机的指标之和即为振荡模式的衰减因子。最后，4机2区域系统的分析结果验证了所提方法的准确性和有效性。 |
| 关键词: 低频振荡 阻尼评估 振荡能量 发电机模型 等效电路 |
| DOI：DOI: 10.19783/j.cnki.pspc. 210291 |
| 投稿时间：2021-03-20修订日期：2021-04-13 |
| 基金项目:国家电网公司科技项目资助“基于发电机性能差异化及电网主导稳定的网源协调性能评估和优化技术研究”(SGZJ0000KXJS1800293，521104180019) |
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| Generator damping evaluation method based on oscillation energy consumption |
| ZHU Hanxing,YE Hua,GAO Lei |
| (1. Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, Shandong University,
Jinan 250061, China; 2. China Electric Power Research Institute Co., Ltd., Beijing 100192, China) |
| Abstract: |
| A damping evaluation method using generator oscillation energy consumption is proposed for accurately evaluate the damping of generators in multi-machine power systems. First, the expression of oscillating energy flow of the generators based on the 6th-order electric parameter model is derived. The method overcomes the conservative nature of the existing oscillation energy consumption method which is based on the 4th-order electrical parameter model. Secondly, based on oscillation energy consumption, a mode damping contribution index and two calculation methods are proposed to evaluate the generator damping characteristic in multi-machine power systems. The mode damping contribution index has clear physical meaning, and the sum of all generator indices is the attenuation factor of the oscillation mode. Finally, the accuracy and effectiveness of the proposed method are validated on the 2-area 4-machine test system.
This work is supported by the Science and Technology Project of State Grid Corporation of China (No. SGZJ0000KXJS1800293 and No. 521104180019). |
| Key words: low-frequency oscillation damping evaluation oscillation energy generator model equivalent circuit |
