Evaluation of HVDC transmission capability for hydro-wind-solar hybrid power bases considering frequency and voltage support strength

WANG Xiaodi; ZHANG Lin; SU Yunche; BI Shuya; LIU Fang; WEN Yunfeng

doi:10.11930/j.issn.1004-9649.202507002

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Evaluation of HVDC transmission capability for hydro-wind-solar hybrid power bases considering frequency and voltage support strength

更新时间：2026-04-30

- Evaluation of HVDC transmission capability for hydro-wind-solar hybrid power bases considering frequency and voltage support strength
- Vol. 59, Issue 4, Pages: 47-58(2026)
- 作者机构：
  
  1. 国网四川省电力公司经济技术研究院,四川,成都,610000
  2. 湖南大学电气与信息工程学院,湖南,长沙,410082
- 作者简介：
- 基金信息：
- DOI：10.11930/j.issn.1004-9649.202507002
  CLC：
- Online First：20 April 2026，
  
  Published：2026
- 稿件说明：
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王潇笛, 张琳, 苏韵掣, 毕淑雅, 刘方, 文云峰. 考虑频率和电压支撑强度的水风光综合基地直流外送能力评估[J]. 中国电力, 2026, 59(4): 47-58.

WANG Xiaodi, ZHANG Lin, SU Yunche, et al. Evaluation of HVDC transmission capability for hydro-wind-solar hybrid power bases considering frequency and voltage support strength[J]. 2026, 59(4): 47-58.
王潇笛, 张琳, 苏韵掣, 毕淑雅, 刘方, 文云峰. 考虑频率和电压支撑强度的水风光综合基地直流外送能力评估[J]. 中国电力, 2026, 59(4): 47-58. DOI： 10.11930/j.issn.1004-9649.202507002.

WANG Xiaodi, ZHANG Lin, SU Yunche, et al. Evaluation of HVDC transmission capability for hydro-wind-solar hybrid power bases considering frequency and voltage support strength[J]. 2026, 59(4): 47-58. DOI： 10.11930/j.issn.1004-9649.202507002.

摘要

大型水风光综合基地具有“源多-弱网-荷少”的基本特征，其大规模清洁能源经直流外送的能力与系统安全稳定紧密耦合。针对高比例新能源接入导致水风光综合基地频率、电压支撑能力弱化的难题，构建了一种计及频率和电压支撑强度的水风光综合基地直流外送能力评估模型。首先，在分析水风光综合基地直流外送能力限制因素的基础上，构建协同评估框架；然后，融合流域梯级水电水力-电力时空约束特性及水风光多能互补特性，建立以外送功率最大化为目标的直流外送能力评估模型。最后，通过量化系统频率响应能力及新能源多场站短路比，构建涵盖频率和电压支撑强度需求的安全约束体系，并采用二阶锥重构技术高效处理非线性频率约束，形成兼顾多能互补特性与系统安全强度的直流外送能力评估方法。基于改进的IEEE算例测试系统开展多场景仿真对比，验证了所提模型的有效性。

Abstract

Large-scale hydro-wind-solar integrated power bases exhibit the fundamental characteristics of multi-energy sources

weak grid structure

and limited local loads. Thus the transmission export capability of its large-scale clean energy through HVDC connection is severely subject to system security and stability. With regards to the issue of frequency/voltage support capabilities weakened by high penetration of renewable energy

this paper develops an HVDC transmission capability evaluation model incorporating frequency and voltage support strength. Firstly

a coordinated assessment framework is established based on the analysis of the constraints limiting HVDC transmission capabilities. Next

by integrating spatio-temporal hydraulic-electric constraints of river basin cascade hydropower generation and considering complementary operation of hydro-wind-PV energy resources

a transmission capacity optimization model with the objective of maximizing delivery power is formulated via mixed-integer second-order cone programming method. Finally

security constraint frameworks covering frequency/voltage support requirements are constructed by quantifying system frequency response capability and short-circuit ratios of multiple renewable plants. Furthermore

by taking advantage of second-order cone reconstruction techniques to efficiently process nonlinear frequency constraints

a transmission capacity evaluation methodology is then formulated which balances the multi-energy complementarity and system security requirements. Case studies on modified IEEE benchmark systems are conducted to validate the model's effectiveness through multi-scenario simulations.

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references

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