| 引用本文: | 武家辉,王海云,王维庆,张强.混合三端直流输电系统在风火打捆并网中的应用及其控制策略[J].电力系统保护与控制,2016,44(2):49-55.[点击复制] |
| WU Jiahui,WANG Haiyun,WANG Weiqing,ZHANG Qiang.A bundling system of wind-coal power plants and its control strategies based on hybrid MTDC transmissions[J].Power System Protection and Control,2016,44(2):49-55[点击复制] |
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| 摘要: |
| 针对大规模风电外送可靠性问题，提出风火打捆经混合三端直流输电并网系统拓扑结构并设计各换流器的控制策略。混合三端直流输电系统的发电端由两个自然换相(LCC)整流器组成，受端由一个电压源型逆变器(VSC)与外电网相连。风电场群侧LCC1换流器采用定有功功率的控制策略，可以追踪最大功率；火电厂侧LCC2换流器采用定直流电流控制策略，可以平抑风功率波动。受端换流站控制器VSC采用定直流电压和定无功功率控制策略，能有效应对换流站侧交流系统短路故障和负荷突变等工况。仿真结果表明所提控制方案的有效性。这种输电模式能够综合利用常规直流输电和轻型直流输电各自的优点，有效扩展常规风火打捆直流输电系统的适用范围。 |
| 关键词: 风火打捆 直流输电 混合多端直流系统 换流站 控制策略 |
| DOI：10.7667/j.issn.1674-3415.2016.02.007 |
| 投稿时间：2015-04-08修订日期：2015-08-01 |
| 基金项目:国家自然科学基金(51267017)；博士点专项基金(20126501130001)；国家863计划(2013AA050604) |
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| A bundling system of wind-coal power plants and its control strategies based on hybrid MTDC transmissions |
| WU Jiahui,WANG Haiyun,WANG Weiqing,ZHANG Qiang |
| (School of Electrical Engineering, Xinjiang University, Urumqi 830047, China; Engineering Research
Center for Renewable Energy Generation & Grid Control, Urumqi 830047, China) |
| Abstract: |
| The wind-thermal bundling system based on a hybrid three-terminal HVDC transmission and the control strategies for each converter are raised to deliver large scale wind power to load center. This hybrid MTDC system consists of two line-communicated converters (LCC) which are connected to sending side, and one voltage source converter (VSC) at the grid side. The LCC1 controller at the wind farm side is designed to control active power and track maximum power while the LCC2 controller at the thermal power plant side, which is in DC current control mode, can compensate power fluctuation. VSC controller at the receiving end is proposed to control DC bus voltage and reactive power so it can operate the fault at the AC bus and the local load mutation. Simulation results demonstrate the effectiveness of the proposed control strategies. The proposed scheme combines advantages of both LCC and VSC HVDC systems and provides a new way to transmit long distance wind power to the main grid. |
| Key words: wind-thermal bundling system HVDC hybrid MTDC converter station control strategy |
