Analysis on Low-frequency Instability of Local Power Grid with Low-frequency Regulation Capacity Dominated by High Proportion of Renewable Energy

Lei QI; Wei ZHAO; Xiaofeng SUN; Ying ZHANG; Huaibao WANG; Yanfei ZHAI

doi:10.7500/AEPS20210826005

您当前的位置：

首页 >

文章列表页 >

Analysis on Low-frequency Instability of Local Power Grid with Low-frequency Regulation Capacity Dominated by High Proportion of Renewable Energy

Basic Research | 更新时间：2025-06-16

- Analysis on Low-frequency Instability of Local Power Grid with Low-frequency Regulation Capacity Dominated by High Proportion of Renewable Energy
- Automation of Electric Power Systems Vol. 46, Issue 12, Pages: 174-183(2022)
- 作者机构：
  
  1.燕山大学电气工程学院，河北省秦皇岛市 066004
  2.国网秦皇岛供电公司，河北省秦皇岛市 066099
- 作者简介：
- 基金信息：
  
  Hebei Provincial Key R&D Program of China(19214405D);Key Program of Hebei Provincial Natural Science Foundation of China(E2021203162)
- DOI：10.7500/AEPS20210826005
  CLC：
- Received：26 August 2021，
  
  Revised：2022-01-06，
  
  Published Online：05 May 2022，
  
  Published：25 June 2022
- 稿件说明：
移动端阅览
齐磊,赵巍,孙孝峰等.低调频容量高比例新能源主导局部电网低频失稳分析[J].电力系统自动化,2022,46(12):174-183.

QI Lei,ZHAO Wei,SUN Xiaofeng,et al.Analysis on Low-frequency Instability of Local Power Grid with Low-frequency Regulation Capacity Dominated by High Proportion of Renewable Energy[J].Automation of Electric Power Systems,2022,46(12):174-183.
齐磊,赵巍,孙孝峰等.低调频容量高比例新能源主导局部电网低频失稳分析[J].电力系统自动化,2022,46(12):174-183. DOI： 10.7500/AEPS20210826005.

QI Lei,ZHAO Wei,SUN Xiaofeng,et al.Analysis on Low-frequency Instability of Local Power Grid with Low-frequency Regulation Capacity Dominated by High Proportion of Renewable Energy[J].Automation of Electric Power Systems,2022,46(12):174-183. DOI： 10.7500/AEPS20210826005.

摘要

随着局部电网新能源发电比例的提高及调频容量的降低，系统低频段阻抗变化及频率维持特性削弱引发了局部电网的低频失稳现象。现有弱电网假设及固定基频的分析方法与电网调频特性不对应，导致系统低频振荡耦合频率波动失稳机理分析受限。针对含柴油同步发电机组及并网逆变器的局部电网，构建了含电压、电流、基频扰动的涵盖阻抗外特性与基频扰动特性的新能源主导发电模型框架。基于所建立的电网强度与渗透率、网侧等效阻抗的耦合关系，分析了强电网弱化后源网端低频段阻抗变化及衍生低频失稳诱因。构建了含基频扰动项的回比矩阵，分析了频率特性项对系统低频失稳的潜在影响并预判了不同渗透率下系统稳定情况。最后，结合硬件在环实验结果，在临界失稳工况下与传统固定基频分析方法进行对比，所提模型可准确预判低调频容量高比例新能源主导局部电网的低频失稳，验证了上述理论分析的正确性。

Abstract

With the increase of the proportion of renewable energy generation in the local power grid and the reduction of the frequency regulation capacity

low-frequency impedance changes of the system and the weakening of the frequency maintenance characteristic lead to the potential low-frequency instability of the local power grid. The current weak grid assumption and the analysis method of fixed fundamental frequency do not correspond to the frequency regulation characteristics of the power grid

resulting in limitation on analysis of the instability mechanism for the low-frequency oscillation coupled with the frequency fluctuation. Aiming at the local power grid with diesel synchronous generator sets and grid-connected inverters

a framework of power generation model dominated by renewable energy is constructed with voltage

current

fundamental frequency disturbance

which covers the external characteristics of impedances and disturbance characteristics of the fundamental frequency. Based on the established coupling relationship between power grid strength

penetration rate

and grid-side equivalent impedance

the low-frequency impedance changes at the source grid side and the induced low-frequency instability inducements are analyzed after the strong grid is weakened. The return ratio matrix containing the fundamental frequency disturbance term is constructed

the potential impact of the frequency characteristic term on the low-frequency instability of the system is analyzed

and the system stability with different penetration rates is predicted. Finally

combined with the results of the hardware-in-the-loop experiment

compared with the traditional fixed fundamental frequency analysis method under the critical instability condition

the proposed model can accurately predict the low-frequency instability problem of the local power grid with low-frequency regulation capacity dominated by a high proportion of renewable energy. The correctness of the above theoretical analysis is verified.

关键词

Keywords

references

张鹏飞，麻常辉，李威，等 . 2021年欧洲电网两次解列事故分析及对中国电网安全的思考［J］. 电力系统自动化， 2021 ， 45 （ 24 ）： 22 - 29 .

ZHANG Pengfei ， MA Changhui ， LI Wei ， et al . Analysis of two splitting accidents of European power grid in 2021 and consideration on power grid security in China ［J］. Automation of Electric Power Systems ， 2021 ， 45 （ 24 ）： 22 - 29 .

谢棚，王德林，郭良杰，等 . 调速器死区对水电高占比电力系统频率稳定的影响分析［J］. 电力系统自动化， 2021 ， 45 （ 24 ）： 89 - 96 .

XIE Peng ， WANG Delin ， GUO Liangjie ， et al . Analysis of influence of governor deadband on frequency stability of power system with high proportion of hydropower ［J］. Automation of Electric Power Systems ， 2021 ， 45 （ 24 ）： 89 - 96 .

解宝，周林，郝高锋，等 . 考虑电网阻抗影响的光伏并网逆变器稳定性与谐振分析及设计［J］. 中国电机工程学报， 2018 ， 38 （ 22 ）： 6662 - 6671 .

XIE Bao ， ZHOU Lin ， HAO Gaofeng ， et al . Stability and resonance analysis and design of photovoltaic grid-connected inverters with effect of grid impedance ［J］. Proceedings of the CSEE ， 2018 ， 38 （ 22 ）： 6662 - 6671 .

姜齐荣，王玉芝 . 电力电子设备高占比电力系统电磁振荡分析与抑制综述［J］. 中国电机工程学报， 2020 ， 40 （ 22 ）： 7185 - 7201 .

JIANG Qirong ， WANG Yuzhi . Overview of the analysis and mitigation methods of electromagnetic oscillations in power systems with high proportion of power electronic equipment ［J］. Proceedings of the CSEE ， 2020 ， 40 （ 22 ）： 7185 - 7201 .

卓振宇，张宁，谢小荣，等 . 高比例可再生能源电力系统关键技术及发展挑战［J］. 电力系统自动化， 2021 ， 45 （ 9 ）： 171 - 191 .

ZHUO Zhenyu ， ZHANG Ning ， XIE Xiaorong ， et al . Key technologies and developing challenges of power system with high proportion of renewable energy ［J］. Automation of Electric Power Systems ， 2021 ， 45 （ 9 ）： 171 - 191 .

WANG X F ， BLAABJERG F . Harmonic stability in power electronic-based power systems： concept， modeling， and analysis ［J］. IEEE Transactions on Smart Grid ， 2019 ， 10 （ 3 ）： 2858 - 2870 .

ZHOU S Y ， ZOU X D ， ZHU D H ， et al . An improved design of current controller for LCL-type grid-connected converter to reduce negative effect of PLL in weak grid ［J］. IEEE Journal of Emerging and Selected Topics in Power Electronics ， 2018 ， 6 （ 2 ）： 648 - 663 .

SANG S ， GAO N ， CAI X ， et al . A novel power-voltage control strategy for the grid-tied inverter to raise the rated power injection level in a weak grid ［J］. IEEE Journal of Emerging and Selected Topics in Power Electronics ， 2018 ， 6 （ 1 ）： 219 - 232 .

WEN B ， BOROYEVICH D ， BURGOS R ， et al . Analysis of D - Q small-signal impedance of grid-tied inverters ［J］. IEEE Transactions on Power Electronics ， 2016 ， 31 （ 1 ）： 675 - 687 .

ZHANG X G ， XIA D N ， FU Z C ， et al . An improved feedforward control method considering PLL dynamics to improve weak grid stability of grid-connected inverters ［J］. IEEE Transactions on Industry Applications ， 2018 ， 54 （ 5 ）： 5143 - 5151 .

胡伟，孙建军，姜一鸣，等 . 含STATCOM的孤岛微电网低频稳定性分析［J］. 中国电机工程学报， 2015 ， 35 （ 10 ）： 2454 - 2462 .

HU Wei ， SUN Jianjun ， JIANG Yiming ， et al . Low-frequency stabilization analysis of isolated micro-grid with STATCOM ［J］. Proceedings of the CSEE ， 2015 ， 35 （ 10 ）： 2454 - 2462 .

孙华东，许涛，郭强，等 . 英国“8·9”大停电事故分析及对中国电网的启示［J］. 中国电机工程学报， 2019 ， 39 （ 21 ）： 6183 - 6192 .

SUN Huadong ， XU Tao ， GUO Qiang ， et al . Analysis on blackout in great Britain power grid on August 9th， 2019 and its enlightenment to power grid in China ［J］. Proceedings of the CSEE ， 2019 ， 39 （ 21 ）： 6183 - 6192 .

王琦，郭钰锋，万杰，等 . 适用于高风电渗透率电力系统的火电机组一次调频策略［J］. 中国电机工程学报， 2018 ， 38 （ 4 ）： 974 - 984 .

WANG Qi ， GUO Yufeng ， WAN Jie ， et al . Primary frequency regulation strategy of thermal units for a power system with high penetration wind power ［J］. Proceedings of the CSEE ， 2018 ， 38 （ 4 ）： 974 - 984 .

ZHOU J Z ， DING H ， FAN S T ， et al . Impact of short-circuit ratio and phase-locked-loop parameters on the small-signal behavior of a VSC-HVDC converter ［J］. IEEE Transactions on Power Delivery ， 2014 ， 29 （ 5 ）： 2287 - 2296 .

张学广，夏丹妮，陈文佳，等 . 三相并网变流器弱电网下频率耦合抑制控制方法［J］. 电工技术学报， 2019 ， 34 （ 21 ）： 4559 - 4571 .

ZHANG Xueguang ， XIA Danni ， CHEN Wenjia ， et al . Frequency coupling suppression control method for three-phase grid-connected converter under weak grid ［J］. Transactions of China Electrotechnical Society ， 2019 ， 34 （ 21 ）： 4559 - 4571 .

RYGG A ， MOLINAS M ， ZHANG C ， et al . A modified sequence-domain impedance definition and its equivalence to the dq -domain impedance definition for the stability analysis of AC power electronic systems ［J］. IEEE Journal of Emerging and Selected Topics in Power Electronics ， 2016 ， 4 （ 4 ）： 1383 - 1396 .

张剑云，李明节 . 新能源高渗透的电力系统频率特性分析［J］. 中国电机工程学报， 2020 ， 40 （ 11 ）： 3498 - 3507 .

ZHANG Jianyun ， LI Mingjie . Analysis of the frequency characteristic of the power systems highly penetrated by new energy generation ［J］. Proceedings of the CSEE ， 2020 ， 40 （ 11 ）： 3498 - 3507 .

谢小荣，贺静波，毛航银，等 . “双高”电力系统稳定性的新问题及分类探讨［J］. 中国电机工程学报， 2021 ， 41 （ 2 ）： 461 - 475 .

XIE Xiaorong ， HE Jingbo ， MAO Hangyin ， et al . New issues and classification of power system stability with high shares of renewables and power electronics ［J］. Proceedings of the CSEE ， 2021 ， 41 （ 2 ）： 461 - 475 .

ZHONG Q C ， WEISS G . Synchronverters： inverters that mimic synchronous generators ［J］. IEEE Transactions on Industrial Electronics ， 2011 ， 58 （ 4 ）： 1259 - 1267 .

LU D P ， WANG X F ， BLAABJERG F . Impedance-based analysis of DC-link voltage dynamics in voltage-source converters ［J］. IEEE Transactions on Power Electronics ， 2019 ， 34 （ 4 ）： 3973 - 3985 .

SONG Y P ， BLAABJERG F . Overview of DFIG-based wind power system resonances under weak networks ［J］. IEEE Transactions on Power Electronics ， 2017 ， 32 （ 6 ）： 4370 - 4394 .

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

No data

Related Author

No data

Related Institution

No data

⁰