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智能配电变压器发展趋势分析
作者:
作者单位:

1.电力设备电气绝缘国家重点实验室,西安交通大学,陕西省西安市 710049;2.陕西省智能电网重点实验室,西安交通大学,陕西省西安市 710049;3.西安交通大学电气工程学院,陕西省西安市 710049

作者简介:

梁得亮(1967—),男,通信作者,教授,主要研究方向:智能配电网系统协同设计及冗余高效控制。E-mail:dlliang@mail.xjtu.edu.cn
柳轶彬(1989—),男,博士研究生,主要研究方向:混合式配电变压器磁集成与优化控制。E-mail:yanerwuming@126.com
寇鹏(1983—),男,博士,副教授,主要研究方向:新能源发电与智能微电网的预测控制。E-mail:koupeng@mail.xjtu.edu.cn

通讯作者:

基金项目:

陕西省2018年重点研发计划资助项目(2018ZDCXL-GY-07-05);国家电网公司科技项目(SGSNKY00KJJS1900039)。


Analysis of Development Trend for Intelligent Distribution Transformer
Author:
Affiliation:

1.State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China;2.Shaanxi Key Laboratory of Smart Grid, Xi’an Jiaotong University, Xi’an 710049, China;3.School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Fund Project:

This work is supported by Key R&D Project of Shaanxi Province in 2018 (No. 2018ZDCXL-GY-07-05) and State Grid Corporation of China (No. SGSNKY00KJJS1900039).

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    摘要:

    智能配电变压器是智能电网快速发展背景下构建新一代配电网的关键部件。结合新能源分布式电源、交直流混联配电网的发展趋势,文中分析了智能配电变压器的主要功能,指出实现智能配电变压器的关键在于利用电力电子技术使配电变压器具备丰富的控制功能。在此基础上,分析指出电力电子变压器(PET)与混合式配电变压器(HDT)是智能配电变压器的两类可选方案。对PET与HDT的工作原理进行说明,列出基于PET,HDT及扩展型HDT的智能配电变压器的几种典型应用电路,并对其特点进行定性分析。基于一种具体的配电网应用场景,从工作原理、可靠性、经济性、可控性等方面对基于PET与HDT的智能配电变压器进行对比,并定性给出当变换功率比重增大时二者各项性能的变化规律。最后分析了智能配电变压器未来的发展趋势。

    Abstract:

    Intelligent distribution transformer is a key device to construct the new generation of intelligent distribution network with the rapid development of smart grid. This paper analyzes the main functions of the intelligent distribution transformer combining the development trend of the distributed generation of renewable power and AC/DC hybrid distribution power system, and states that the key of realizing the intelligent distribution transformer is the high controllability, which can be achieved by utilizing the power electronic devices. Based on this, the analysis shows that the power electronic transformer (PET) and hybrid distribution transformer (HDT) are two alternative circuit schemes for the intelligent distribution transformer. The basic working principle of PET and HDT are introduced, and the several typical topologies of the intelligent distribution transformer based on PET, HDT and the extended HDT are presented and their characteristics are analyzed. Based on a specific application scenario in the distribution network, the working principle, reliability, economy, controllability of the intelligent distribution transformer based on PET and HDT are compared, and the variation trend of each performance is presented when the ratio of the conversion power increases. Finally, the future development trend of the intelligent distribution transformer are analyzed.

    图1 未来配电网结构示意图Fig.1 Structure diagram of future
    图1 未来配电网结构示意图Fig.1 Diagram of future distribution network structure
    图2 基于MMC型PET的智能配电变压器主电路拓扑Fig.2 Topology of main circuit for intelligent distribution transformer based on MMC-PET
    图3 基于扩展型HDT的智能配电变压器三相电路拓扑Fig.3 Topology of three-phase circuit of intelligent distribution transformer based on extended HDT
    图4 扩展型HDT三相变流器拓扑Fig.4 Topologies of three-phase convertor for
    图5 变换功率比重增大时各性能的变化趋势Fig.5 Variation trend of each performance when ratio of conversion power increases
    图 AC/AC型PET拓扑Fig. Topology of PET with AC/AC convertor
    图 AC/DC/AC型PET拓扑Fig. Topology of PET with AC/DC/AC convertor
    图 基于CHB型PET的智能配电变压器主电路拓扑Fig. Topology of the Intelligent Distribution Transformer Based on CHB-PET
    图 基于NPC型PET的智能配电变压器主电路拓扑Fig. Topology of the Intelligent Distribution Transformer Based on NPC-PET
    图 基于多端口PET的智能配电变压器拓扑Fig. Topology of the Intelligent Distribution Transformer Based on Multiport PET
    图 AC/DC/AC变换器拓扑Fig. Topology of the AC/DC/AC convertor
    图 基于HDT的智能配电变压器单相电路示意图Fig. Circuit scheme of the Single-phase Intelligent Distribution Transformer Based on HDT
    图 基于HDT的智能配电变压器等效电路原理Fig. Equivalent Circuit of the Intelligent Distribution Transformer based on HDT
    图 基于扩展型HDT的智能配电变压器电路拓扑Fig. Circuit scheme of the Single-phase Intelligent Distribution Transformer Based on the extended HDT
    图 只接入传统交流配电网时智能配电变压器性能对比Fig. Performance comparison in the case of only accessing the main distribution network
    图 孤岛运行模式下的性能对比Fig. Performance comparison in the case of operating in the island mode
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引用本文

梁得亮,柳轶彬,寇鹏,等.智能配电变压器发展趋势分析[J].电力系统自动化,2020,44(7):1-14. DOI:10.7500/AEPS20190507007.
LIANG Deliang,LIU Yibin,KOU Peng,et al.Analysis of Development Trend for Intelligent Distribution Transformer[J].Automation of Electric Power Systems,2020,44(7):1-14. DOI:10.7500/AEPS20190507007.

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  • 收稿日期:2019-05-07
  • 最后修改日期:2019-07-08
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  • 在线发布日期: 2020-03-25
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