双极型H-HVDC输电系统向无源网络供电的特性研究
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摘要
详细分析了双极型H-HVDC输电系统的结构和工作原理,建立了整流侧采用LCC、逆变侧采用VSC的双极型H-HVDC输电系统向无源网络供电的模型。保证系统功率平衡和受端无源网络交流电压稳定的前提下,设计了双极型H-HVDC输电系统的协调控制策略。基于PSCAD/EMTDC仿真软件,研究了双极型H-HVDC输电系统向无源网络供电时的稳态运行特性、故障暂态特性及单极闭锁故障下的供电可靠性,仿真结果表明,双极型HHVDC输电系统能够很好地向受端无源网络供电,同时拥有较高的供电可靠性和稳定性。文章最后也指出,随着全控型电力电子器件的飞速发展,VSC控制策略的逐步成熟及造价的逐渐降低,双极型H-HVDC输电系统凭借自身诸多优点将成为以后电网新建和已有电网改造升级的可行方案。
In this paper,the structure and working principle of bipolar H-HVDC transmission system are designed and analyzed in detail,and the model of bipolar H-HVDC transmission system supplying passive network is established,whose rectifier side adopts LCC,and inverter side adopts VSC. The cooperative control strategy of bipolar H-HVDC transmission system is designed under the premise of ensuring the power balance of the system and the AC voltage stability of the passive network. The steady-state operating characteristics,transient characteristics,reliability of power supply under the condition of monopolar locking fault of bipolar H-HVDC transmission system supplying passive network are studied based on PSCAD/EMTDC simulation software. Simulation results show that the bipolar H-HVDC transmission system is able to supply the passive network with high power supply reliability and stability.Finally,the paper also points out bipolar H-HVDC transmission system will become a feasible scheme for the new building and the reconstruction of the power grid with the rapid development of the full controlledpower electronic devices, maturing of VSC control strategy and gradually reducing cost of VSC manufacturing.
In this paper,the structure and working principle of bipolar H-HVDC transmission system are designed and analyzed in detail,and the model of bipolar H-HVDC transmission system supplying passive network is established,whose rectifier side adopts LCC,and inverter side adopts VSC. The cooperative control strategy of bipolar H-HVDC transmission system is designed under the premise of ensuring the power balance of the system and the AC voltage stability of the passive network. The steady-state operating characteristics,transient characteristics,reliability of power supply under the condition of monopolar locking fault of bipolar H-HVDC transmission system supplying passive network are studied based on PSCAD/EMTDC simulation software. Simulation results show that the bipolar H-HVDC transmission system is able to supply the passive network with high power supply reliability and stability.Finally,the paper also points out bipolar H-HVDC transmission system will become a feasible scheme for the new building and the reconstruction of the power grid with the rapid development of the full controlledpower electronic devices, maturing of VSC control strategy and gradually reducing cost of VSC manufacturing.
引文
[1]郭春义,赵成勇,彭茂兰,等.一种具有直流故障穿越能力的混合直流输电系统[J].中国电机工程学报,2015,35(15):4345-4352.
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[7]郭春义,赵成勇,Montanari A,等.混合双极高压直流输电系统的特性研究[J].中国电机工程学报,2012,32(10):98-104.
[8]Manohar P,Kelamane V,Kaushik D,et al.Improved controls for LCC-VSC hybrid HVDC system[C]//2013International Conference on Circuits,Controls and Communications(CCUBE).Bengaluru:IEEE,2013.
[9]赵成勇,刘文静,郭春义,等.一种适用于风电场送出的混合型高压直流输电系统拓扑[J].电力系统自动化,2013,37(15):146-151.
[2]陈博怡,李兴源,胡永银,等.混合直流输电控制策略研究[J].高压电器,2016,52(1):118-123.
[3]LI K,LI X Y,CHEN S.Investigation of hybrid pseudo bipolar HVDC performances supply power to passive ACnetwork[J].Sensors&Transducers,2014,175(7):306-312.
[4]LIU W,ZHAO C Y,GUO C Y.The control strategy for Hybrid HVDC using voltage margin control and voltage dependent current order limiter control[C]//IETRenewable Power Generation Conference,Beijing,China,2013.
[5]郭春义,刘文静,赵成勇,等.混合直流输电系统的参数优化方法[J].电力系统自动化,2015,39(11):96-102.
[6]郭春义,赵成勇,王晶.新型双馈入直流输电系统供电无源网络的运行特性研究[J].电工技术学报,2012,27(11):211-218.
[7]郭春义,赵成勇,Montanari A,等.混合双极高压直流输电系统的特性研究[J].中国电机工程学报,2012,32(10):98-104.
[8]Manohar P,Kelamane V,Kaushik D,et al.Improved controls for LCC-VSC hybrid HVDC system[C]//2013International Conference on Circuits,Controls and Communications(CCUBE).Bengaluru:IEEE,2013.
[9]赵成勇,刘文静,郭春义,等.一种适用于风电场送出的混合型高压直流输电系统拓扑[J].电力系统自动化,2013,37(15):146-151.