基于直流电压同步的电网形成- pmsg的增强动态支持策略：频率和Q支持视角

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

International Journal of Electrical Power & Energy Systems Pub Date : 2025-05-16 DOI:10.1016/j.ijepes.2025.110745

Dejian Yang , Tongyu Hu , Taiying Zheng , Minhui Qian , Chaoquan Li , Zhijie Cao , Gangui Yan

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引用次数: 0

摘要

基于直流电压同步的并网PMSG具有频率和无功支持等电压源特性，但支持能力有限，调节潜能未得到充分发挥。本文从频率支持和无功支持两方面提出了基于直流电压同步并网的PMSG的增强动态支持策略。为此，首先分析了具有直流电容电压同步的并网风电机组的惯性同步和自主电压支撑机制。其次，提出了基于直流电压同步的PMSG快速频率支持和电压支持方法，并增加了控制环。借助转子运动方程和潮流方程，揭示了基于直流电压同步并网的PMSG的FFS对频率稳定的影响特性和无功调节策略对暂态电压稳定的影响。然后，构建MSC和GSC的小信号模型，借助状态空间模型观察根轨迹的变化趋势，确定所提出策略参数的边界；最后，基于PSCAD/EMTDC验证了基于直流电压同步并网的PMSG对电网的频率和电压支持能力。仿真结果表明，所提出的频率支持环和电压支持环可以有效地提高基于直流电压同步的成网PMSG的动态性能。

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Enhanced dynamic support strategies of grid-forming-PMSG based on DC-voltagesynchronization: Frequency and Q support perspective

The DC-Voltage Synchronization based Grid-Forming PMSG has voltage source characteristics, e.g. frequency and reactive power support function, however, the support capability is limited, and the regulation potential is not fully utilized. This paper suggests the enhanced dynamic support strategies of DC-voltage synchronization-based grid-forming PMSG from perspective: frequency and reactive power support. To this end, firstly, the inertia synchronization and autonomous voltage support mechanism of grid-forming wind turbine (WT) with DC capacitor voltage synchronization are analyzed. Secondly, the fast frequency support (FFS) and voltage support method for DC-voltage synchronization-based grid-forming PMSG are proposed with additional control loops. With the help of rotor motion equation and power flow equation, the influence characteristics of FFS of DC-voltage synchronization-based grid-forming PMSG on frequency stability and reactive power regulation strategy on transient voltage stability are revealed. Then, the small signal model of MSC and GSC is constructed, and the change trend of root trajectory is observed with the help of state space model, and the boundary of the proposed strategy parameters is determined. Finally, based on PSCAD/EMTDC, the frequency and voltage support abilities of DC-voltage synchronization-based grid-forming PMSG to power grid are verified. Simulations indicate that the suggested additional frequency support loop and voltage support loop could effectively increase dynamic performance of DC-voltage synchronization-based grid-forming PMSG.

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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.