基于虚拟同步发电机的多区域交直流互联电网二次调频控制
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摘要
通过模拟传统同步发电机的有功-频率响应特性,提出了基于虚拟同步发电机技术的交直流互联电网二次调频控制方法,使得VSC-HVDC主动响应频率变化。文章首先建立了含VSC-HVDC的交直流互联电网二次调频控制模型,通过优化虚拟同步发电机参数构建了多区域交直流互联电网的二次调频控制策略,并以4区域交直流互联电网二次调频控制模型为例进行了仿真。仿真结果表明,文章所提出的基于虚拟同步发电机的VSC-HVDC调频策略,能够保证互联系统频率在较小的范围内变化,其调频效果优于传统的直流调制控制,明显地改善了互联电网的频率稳定性。
By emulating the active power-frequency response characteristics of the traditional synchronous generator, the secondary frequency control method based on the virtual synchronous generator technology for AC/DC interconnected power grid is proposed, which makes the VSC-HVDC active response frequency change. In this paper, the secondary frequency control model of AC/DC interconnected power grid with VSC-HVDC is set up. The secondary frequency control strategy of multi-area interconnected power grid is constructed by optimizing the parameters of the virtual synchronous generator. Taking the secondary frequency control model of the four-area interconnected power grid as an example, the simulation results show that the frequency control strategy of VSC-HVDC based on the virtual synchronous generator not only can ensure that the frequency of the interconnected system varies in a small range, but also the frequency control effect is better than the traditional DC power modulation control, which obviously improves the frequency stability of the interconnected power grid.
By emulating the active power-frequency response characteristics of the traditional synchronous generator, the secondary frequency control method based on the virtual synchronous generator technology for AC/DC interconnected power grid is proposed, which makes the VSC-HVDC active response frequency change. In this paper, the secondary frequency control model of AC/DC interconnected power grid with VSC-HVDC is set up. The secondary frequency control strategy of multi-area interconnected power grid is constructed by optimizing the parameters of the virtual synchronous generator. Taking the secondary frequency control model of the four-area interconnected power grid as an example, the simulation results show that the frequency control strategy of VSC-HVDC based on the virtual synchronous generator not only can ensure that the frequency of the interconnected system varies in a small range, but also the frequency control effect is better than the traditional DC power modulation control, which obviously improves the frequency stability of the interconnected power grid.
引文
[1]汤广福.基于电压源换流器的高压直流输电技术[M]北京:中国电力出版社,2010.
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[6]姚为正,杨美娟,张海龙,等.VSC-HVDC受端换流器参与电网调频的VSG控制及其改进算法[J].中国电机工程学报,2017,37(2):525-533.
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[14]李斌,周林,余希瑞,等.基于改进虚拟同步发电机算法的微网逆变器二次调频方案[J].电网技术,2017,41(8):2680-2687.
[15]梁英,盛万兴,钟庆昌,等.基于同步逆变器的微电网二次调频策略及特性分析[J].中国电机工程学报,2017,37(2):391-402.
[16]涂春鸣,杨义,兰征,等.含多虚拟同步发电机的微电网二次调频策略[J].电工技术学报,2018,33(10):2186-2195.
[17]廖小兵,刘开培,汪宁渤,等.含风电的交直流互联电网AGC两级分层模型预测控制[J].电力系统自动化,2018,42(8):45-50.
[18]高丙团,夏超鹏,张磊,等.基于虚拟同步电机技术的VSC-HVDC整流侧建模及参数设计[J].中国电机工程学报,2017,37(2):534-543.
[2]王永,殷大朋,陈中,等.基于多参数协同自适应调节策略的电压源高压直流虚拟同步发电机仿真研究[J]广东电力,2017,30(10):57-62.
[3]张武其,吕洋.向弱电网供电的VSC-HVDC系统的模拟惯量控制策略研究[J].电力系统保护与控制,2016,44(6):104-110.
[4]朱瑞可,王渝红,李兴源,等.用于VSC-HVDC互联系统的附加频率控制策略[J].电力系统自动化,2014,38(16):81-87.
[5]鲍正杰,李生虎.基于VSC-HVDC有功支援和自适应低频减载的区域电网频率控制[J].电力系统保护与控制,2014(20):32-37.
[6]姚为正,杨美娟,张海龙,等.VSC-HVDC受端换流器参与电网调频的VSG控制及其改进算法[J].中国电机工程学报,2017,37(2):525-533.
[7]Wang R,Chen L,Zheng T,et al.VSG-based adaptive droop control for frequency and active power regulation in the MTDC system[J].Csee Journal of Power&Energy Systems,2017,3(3):260-268.
[8]Cao Y,Wang W,Li Y,et al.A virtual synchronous generator control strategy for VSC-MTDC system[J].IEEE Transactions on Energy Conversion,2018,33(2):750-761.
[9]Hirase Y,Abe K,Sugimoto K,et al.A novel control approach for virtual synchronous generators to suppress frequency and voltage fluctuations in microgrids[J].Applied Energy,2018,210:699-710.
[10]王宇龙,李岚,叶吉亮,等.模拟同步发电机特性的分布式电源逆变器控制[J].可再生能源,2018,36(2):241-246.
[11]Zhu J,Booth C D,Adam G P,et al.Inertia emulation control strategy for VSC-HVDC transmission systems[J].IEEE Transactions on Power Systems,2013,28(2):1277-1287.
[12]Zhu J,Guerrero J M,Hung W,et al.Generic inertia emulation controller for multi-terminal voltage-sourceconverter high voltage direct current systems[J].IETRenewable Power Generation,2014,8(7):740-748.
[13]徐诚,刘念,赵泓,等.基于电力系统二次调频原理的微电源频率控制策略[J].电力系统保护与控制,2013,41(3):14-20.
[14]李斌,周林,余希瑞,等.基于改进虚拟同步发电机算法的微网逆变器二次调频方案[J].电网技术,2017,41(8):2680-2687.
[15]梁英,盛万兴,钟庆昌,等.基于同步逆变器的微电网二次调频策略及特性分析[J].中国电机工程学报,2017,37(2):391-402.
[16]涂春鸣,杨义,兰征,等.含多虚拟同步发电机的微电网二次调频策略[J].电工技术学报,2018,33(10):2186-2195.
[17]廖小兵,刘开培,汪宁渤,等.含风电的交直流互联电网AGC两级分层模型预测控制[J].电力系统自动化,2018,42(8):45-50.
[18]高丙团,夏超鹏,张磊,等.基于虚拟同步电机技术的VSC-HVDC整流侧建模及参数设计[J].中国电机工程学报,2017,37(2):534-543.