Flexibility Assessment of Grid-connected Converter for New Energy Generation Based on Entropy Weight Method

MENG Tieqiang; ZHANG Xing; XIAO Yu; LI Fei; JIA Ke; BI Tianshu

doi:10.13334/j.0258-8013.pcsee.241182

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Flexibility Assessment of Grid-connected Converter for New Energy Generation Based on Entropy Weight Method

更新时间：2026-06-25

- Flexibility Assessment of Grid-connected Converter for New Energy Generation Based on Entropy Weight Method
- Vol. 45, Issue 15, Pages: 6051-6061(2025)
- 作者机构：
  
  1. 合肥工业大学电气与自动化工程学院,安徽省,合肥市,230009
  2. 华北电力大学电气与电子工程学院, 北京市昌平区,102206
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.241182
  CLC：
- Published：2025
- 稿件说明：
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MENG Tieqiang, ZHANG Xing, XIAO Yu, et al. Flexibility Assessment of Grid-connected Converter for New Energy Generation Based on Entropy Weight Method[J]. 2025, 45(15): 6051-6061.
DOI：

MENG Tieqiang, ZHANG Xing, XIAO Yu, et al. Flexibility Assessment of Grid-connected Converter for New Energy Generation Based on Entropy Weight Method[J]. 2025, 45(15): 6051-6061. DOI： 10.13334/j.0258-8013.pcsee.241182.

摘要

为实现新能源发电系统的高效稳定运行，其并网变流器具有应对源侧与网侧变化的适应能力是尤为关键的。而这种适应能力可以通过灵活性进行表征，因此科学评估出并网变流器在不同工况下的灵活性水平至关重要。文中提出将熵权法应用于并网变流器的灵活性评估，初探并网变流器灵活性评估体系，以考虑小信号稳定性与暂态稳定性的有功与无功出力为灵活性指标；基于实际应用的大功率并网变流器，分析其在不同的电网状况、控制策略以及过流能力下的灵活性指标数据，从而科学评估并网变流器的灵活性水平；揭示采用单一控制算法的并网变流器灵活性不足问题，为设计自适应控制的灵活并网变流器提供一定理论依据。

Abstract

To realize the efficient and stable operation of new energy power generation systems

it is especially critical for the grid-connected converters to have the adaptive ability to cope with the changes in the source and grid sides. This adaptive ability can be characterized by flexibility

so it is crucial to scientifically assess the flexibility level of the grid-connected converter under different operating conditions. This paper proposes applying the entropy weight method to the flexibility assessment of grid-connected converters

and initially explores the flexibility assessment system of grid-connected converters

taking the active and reactive power outputs and considering the small-signal stability and transient stability as the flexibility indexes. Based on the actual application of high-power grid-connected converters

the flexibility index data under different grid conditions

control strategies and overcurrent capabilities are analyzed to scientifically assess the flexibility level of grid-connected converters

reveal the lack of flexibility of grid-connected converters with a single control algorithm

and provide a theoretical basis for the design of flexible grid-connected converters with adaptive control strategies.

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