| 直流配电网的电压协调控制策略 |
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| 引用本文： | 马秀达,康小宁,李少华,张旭泽,王豪.直流配电网的电压协调控制策略[J].电力系统自动化,2016,40(17):169-176. |
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| 作者姓名： | 马秀达 康小宁 李少华 张旭泽 王豪 |
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| 作者单位： | 西安交通大学电气工程学院, 陕西省西安市 710049,西安交通大学电气工程学院, 陕西省西安市 710049,西安交通大学电气工程学院, 陕西省西安市 710049; 许继电气股份有限公司, 河南省许昌市 461000,西安交通大学电气工程学院, 陕西省西安市 710049,西安交通大学电气工程学院, 陕西省西安市 710049 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目(2015AA050101) |
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| 摘 要： | 为了使直流配电网在不同运行工况下均能保持电压稳定,对直流电压偏差控制与下降控制进行综合优化,提出了直流配电网的电压协调控制策略。通过潮流计算给出各换流器的控制参考值,使网络在恒压模式下能安全稳定运行,当系统出现分布式电源功率波动、负荷变化、换流站退出运行等工况时,各单元根据本地直流电压的变化实现分散自律控制,不依赖通信,可快速实现系统的平稳恢复。根据主换流站的工作状态将系统分为三种运行模式,并给出了系统运行于不同模式时各变流装置的控制策略。应用PSCAD/EMTDC仿真验证表明,该控制策略在各种工况下均能保持直流电压稳定,且储能装置的快速充放电可实现各器件控制策略的平滑切换,提高了系统的供电可靠性。
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| 关 键 词： | 直流配电网 协调控制 光伏阵列 储能装置 |
| 收稿时间： | 2015/11/15 0:00:00 |
| 修稿时间： | 6/2/2016 12:00:00 AM |
Coordinated Scheme for Automatic Voltage Control of DC Distribution Network |
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| MA Xiud,KANG Xiaoning,LI Shaohu,ZHANG Xuze and WANG Hao.Coordinated Scheme for Automatic Voltage Control of DC Distribution Network[J].Automation of Electric Power Systems,2016,40(17):169-176. |
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| Authors: | MA Xiud KANG Xiaoning LI Shaohu ZHANG Xuze and WANG Hao |
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| Affiliation: | School of Electrical Engineering, Xi''an Jiaotong University, Xi''an 710049, China,School of Electrical Engineering, Xi''an Jiaotong University, Xi''an 710049, China,School of Electrical Engineering, Xi''an Jiaotong University, Xi''an 710049, China; XJ Electric Co. Ltd., Xuchang 461000, China,School of Electrical Engineering, Xi''an Jiaotong University, Xi''an 710049, China and School of Electrical Engineering, Xi''an Jiaotong University, Xi''an 710049, China |
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| Abstract: | In order to maintain steady voltage under different operating conditions in a DC distribution system, a coordinated scheme for automatic voltage control is proposed by conducting comprehensive optimization for DC voltage error control and droop control. Reference values are provided via power flow calculation to ensure safe operation of the network in constant voltage mode. When there is DG unit power fluctuation, load change or converter station out of service in the system, each unit is required to achieve decentralized autonomous control of function of the changes in local DC voltage independent of communication. Three system operation modes are used according to the main converter working states. The operation patterns of each power electronic converter in different modes are analyzed. Simulation verification indicates that, the DC voltage remains stable because of the control strategy under various working conditions, and smooth switch between different modes is achieved through quick charging and discharging of the energy storing device, hence the reliability of the system. This work is supported by National High Technology Research and Development Program of China(863 Program)(No. 2015AA050101). |
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| Keywords: | DC distribution network coordinated control photovoltaic array energy storing device |
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