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新能源发电集群的改进等效短路比计算方法
作者:
作者单位:

1.中国电力科学研究院有限公司(南京),江苏省南京市 210003;2.新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司),北京市 100192

摘要:

短路比是衡量电源接入点并网强度的重要指标,低短路比并网的新能源电站发生振荡、电压失稳等问题的风险较高。文中首先针对新能源集群并网的场景,分析了常用的加权短路比、复合短路比以及等效短路比等计算方法的适用性及其不足,提出了一种考虑新能源无功出力、静止无功发生器、阻抗角以及初始相位角的改进的新能源集群等效短路比计算方法。然后,基于简单网络证明了所提计算方法与常规短路比的相互关系,分析了无功补偿方式对等效短路比的影响。最后,结合典型算例和实际新能源基地经特高压直流送出工程,开展了基于改进等效短路比的电网强度评估应用研究,并进一步分析了分布式调相机对于加强新能源电站并网点强度的作用。

关键词:

基金项目:

国家重点研发计划资助项目(2016YFB0900100)。

通信作者:

作者简介:

朱凌志(1975—),男,通信作者,博士,研究员级高级工程师,主要研究方向:新能源发电建模仿真及运行控制。E-mail:zhulingzhi@epri.sgcc.com.cn
曲立楠(1985—),女,硕士,高级工程师,主要研究方向:新能源发电建模仿真分析。
刘纯(1968—),男,研究员级高级工程师,主要研究方向:新能源发电技术。


Improved Calculation Method of Equivalent Short-circuit Ratio for Power Generation Cluster of Renewable Energy
Author:
Affiliation:

1.China Electric Power Research Institute (Nanjing), Nanjing 210003, China;2.State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems (China Electric Power Research Institute), Beijing 100192, China

Abstract:

Short-circuit ratio (SCR) is an important indicator to measure the grid-connected strength of power access points. The probability of oscillation and voltage instability for renewable energy power plants connected to the grid with low SCR is higher. First, for the scenario of the grid-connected renewable energy cluster, this paper analyzes the applicability and deficiencies of calculation methods of weighted SCR, composite SCR and equivalent SCR that are commonly used. An improved equivalent SCR calculation method for the renewable energy cluster considering reactive power output of renewable energy, static var generators, impedance angle and initial phase angle is proposed. Then, based on a simple network, the relationship between the proposed calculation method and the conventional SCR is proven, and the influence of the reactive power compensation method on the equivalent SCR is analyzed. Finally, combined with typical calculation examples and actual renewable energy base with ultra-high voltage DC transmission project, assessment and application study of power grid strength based on improved equivalent SCR is carried out, and the effect of distributed condensers on strengthening the grid-connected point strength of renewable energy power plants is further analyzed.

Keywords:

Foundation:
This work is supported by National Key R&D Program of China (No. 2016YFB0900100).
引用本文
[1]朱凌志,曲立楠,刘纯,等.新能源发电集群的改进等效短路比计算方法[J].电力系统自动化,2021,45(22):74-82. DOI:10.7500/AEPS20210126009.
ZHU Lingzhi, QU Linan, LIU Chun, et al. Improved Calculation Method of Equivalent Short-circuit Ratio for Power Generation Cluster of Renewable Energy[J]. Automation of Electric Power Systems, 2021, 45(22):74-82. DOI:10.7500/AEPS20210126009.
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  • 收稿日期:2021-01-26
  • 最后修改日期:2021-05-17
  • 录用日期:
  • 在线发布日期: 2021-11-16
  • 出版日期: