Research on primary frequency regulation and VSC-HVDC frequency synchronization control coordination method for large-scale hydropower DC export regional grid

IF 5 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Electrical Power & Energy Systems Pub Date : 2025-04-10 DOI:10.1016/j.ijepes.2025.110655

Hongchun Shu , Huaibin Gao , Zongxue Shao , Yongzan Cui , Wei Zhao

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引用次数: 0

Abstract

In asynchronous grid connection mode, the rotational inertia of the partitioned synchronized grid decreases, leading to prominent frequency stability issues. A bi-level optimization design method is proposed based on VSC-HVDC frequency synchronization control (VSC-FSC) and coordinated control of primary frequency regulation in hydropower. Additionally, to mitigate power counter-regulation caused by the water-hammer effect, an auxiliary control responsive to the water-hammer effect is introduced into the VSC-FSC. Firstly, the characteristics of VSC-FSC and primary frequency regulation of the power grid are analyzed. Then, based on the characteristics of VSC-FSC and its coordination with primary frequency regulation in hydropower, a bi-level optimization model for control parameters is constructed. An evolutionary algorithm is used to solve the optimal parameters hierarchically progressively. Finally, a simplified test system for the Luxi back-to-back HVDC and an improved 7-generator 36-node DC asynchronous extensive power grid system based on the IEEE standard model were developed in real-time digital simulation (RTDS) to validate the effectiveness of the proposed coordinated control method.

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大型水电直流出口区域电网一次调频与 VSC-HVDC 频率同步控制协调方法研究

在异步并网模式下，分区同步电网的转动惯量减小，导致频率稳定问题突出。基于 VSC-HVDC 频率同步控制（VSC-FSC）和水电一次频率调节协调控制，提出了一种双级优化设计方法。此外，为缓解水锤效应引起的功率反调节，在 VSC-FSC 中引入了响应水锤效应的辅助控制。首先，分析了 VSC-FSC 和电网一次频率调节的特性。然后，根据 VSC-FSC 的特点及其与水电一次频率调节的协调性，构建了控制参数的双级优化模型。采用进化算法逐级求解最优参数。最后，在实时数字仿真（RTDS）中开发了一个简化的鲁西背靠背高压直流试验系统和一个基于 IEEE 标准模型的改进型 7 发电机 36 节点直流异步广泛电网系统，以验证所提出的协调控制方法的有效性。

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来源期刊

International Journal of Electrical Power & Energy Systems 工程技术-工程：电子与电气

CiteScore

12.10

自引率

17.30%

发文量

1022

审稿时长

51 days

期刊介绍： The journal covers theoretical developments in electrical power and energy systems and their applications. The coverage embraces: generation and network planning; reliability; long and short term operation; expert systems; neural networks; object oriented systems; system control centres; database and information systems; stock and parameter estimation; system security and adequacy; network theory, modelling and computation; small and large system dynamics; dynamic model identification; on-line control including load and switching control; protection; distribution systems; energy economics; impact of non-conventional systems; and man-machine interfaces. As well as original research papers, the journal publishes short contributions, book reviews and conference reports. All papers are peer-reviewed by at least two referees.