首页|Steady-state Voltage Security-constrained Optimal Frequency Control for Weak HVDC Sending-end AC Power Systems

Steady-state Voltage Security-constrained Optimal Frequency Control for Weak HVDC Sending-end AC Power Systems

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Due to the fact that a high share of renewable ener-gy sources(RESs)are connected to high-voltage direct current(HVDC)sending-end AC power systems,the voltage and fre-quency regulation capabilities of HVDC sending-end AC power systems have diminished.This has resulted in potential system operating problems such as overvoltage and overfrequency,which occur simultaneously when block faults exist in the HVDC link.In this study,a steady-state voltage security-con-strained optimal frequency control method for weak HVDC sending-end AC power systems is proposed.The integrated vir-tual inertia control of RESs is employed for system frequency regulation.Additional dynamic reactive power compensation de-vices are utilized to control the voltage of all nodes meet volt-age security constraints.Then,an optimization model that si-multaneously considers the frequency and steady-state voltage security constraints for weak HVDC sending-end AC power sys-tems is established.The optimal control scheme with the mini-mum total cost of generation tripping and additional dynamic reactive power compensation required is obtained through the optimization solution.Simulations are conducted on a modified IEEE 9-bus test system and practical Qing-Yu line commutated converter based HVDC(LCC-HVDC)sending-end AC power system to verify the effectiveness of the proposed method.

Renewable energy source(RES)high-voltage direct current(HVDC)AC power systemoptimal frequency controlsteady-state voltage securitydynamic reactive power compensation

Qiangqiang Wang、Liangzhong Yao、Jian Xu、Yuping Zheng、Wei Li、Wei Wang

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School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,Chi-na

Hubei Engineering and Technology Research Center for AC/DC Intelligent Distribution Network(Wuhan University),Wuhan 430072,China

State Key Laboratory of Smart Grid Protection and Control,NARI Group Corporation(State Grid Electric Power Re-search Institute),Nanjing 211106,China

国家重点研发计划Science and Technology Project of State Grid Corporation of China

2022YFB240270052272222001J

2024

10.35833/MPCE.2023.000357

现代电力系统与清洁能源学报(英文版)

现代电力系统与清洁能源学报(英文版)

ISSN：
年,卷(期)：2024.12(2)
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