级联H桥中压储能系统离网控制策略

doi:10.3969/j.issn.1000－7229.2017.03.010

电力建设 ›› 2017, Vol. 38 ›› Issue (3): 69-.doi: 10.3969/j.issn.1000－7229.2017.03.010

级联H桥中压储能系统离网控制策略

陈辉1，王德顺2，殷正刚3，吴敏秀4，师长立3，汪建威5

1.国网江苏省电力公司，南京市 210024；2.中国电力科学研究院，南京市 210003；
3.中国科学院电工研究所，北京市 100190；4. 国网扬州供电公司，江苏省扬州市 211400；

5. 中国电能成套设备有限公司，北京市 100080

出版日期:2017-03-01
作者简介:陈辉(1976)，男，高级工程师，本文通信作者，主要研究方向为配电运检、配电自动化；王德顺(1982)，男，硕士，高级工程师，主要研究方向为分布式发电与微电网集成技术；殷正刚(1982)，男，博士，助理研究员，主要研究方向为大功率电力电子与电能变换技术；吴敏秀(1970)，女，学士，高级工程师，主要研究方向为配电网运行与检修技术；师长立(1984)，男，硕士，工程师，主要研究方向为储能与电网应用技术、分布式新能源发电技术等；汪建威(1988)，男，硕士，工程师，主要研究方向为大功率电池储能关键技术。
基金资助:
国网江苏省电力公司科技项目(J2016071)

Off-Grid Control Strategies for H-Bridge Cascaded Medium Voltage Energy Storage System

CHEN Hui1, WANG Deshun2，YIN Zhenggang3, WU Minxiu4, SHI Changli3, WANG Jianwei5

1. State Grid Jiangsu Electric Power Company, Nanjing 210024, China；2. China Electric Power Research Institute, 
Nanjing 210003, China；3. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China；

4. State Grid Yangzhou Power Supply Company, Yangzhou 211400, Jiangsu Province, China；

5. China Electric Power Complete Equipment Company, Beijing 100080, China

Online:2017-03-01
Supported by:

摘要/Abstract

摘要： 在高压大功率储能应用场景中采用中压储能系统相对低压储能系统具有更高的效率。目前基于级联H桥的中压储能系统研究较多，但已有研究多集中于并网运行，离网控制研究较少。该文对基于级联H桥的模块化多电平中压储能系统的离网运行控制进行了阐述。建立了级联H桥中压储能系统的离网模型，提出了包含交流电压外环和电流内环的中压储能系统离网电压控制策略，并针对离网运行时单相负载较多，三相电压容易不平衡的问题，提出了三相电压不平衡补偿控制方法。搭建了MATLAB/RT_LAB实时仿真系统，对上述控制进行了仿真验证。结果表明，三相负载平衡时，负载端电压保持恒定，电流内环跟踪精确；三相负载不平衡时，经电压不平衡补偿后，负载端的三相电压仍然能保持平衡，负载三相电流则随三相负载的大小而不同，仿真证明了该文提出的级联H桥中压储能系统离网控制策略的有效性。

关键词: , 中压储能系统, 离网控制, 级联H桥变流器

Abstract: In the high-voltage high-power energy storage applications, using the medium voltage energy storage system (ESS) can get higher efficiency than using the low voltage ESS. At present, there are some researches on the H-bridge cascaded medium voltage ESS, but most of them are about on-grid control, the off-grid control research is lack. This paper introduces the off-grid control of H-bridge cascaded modular multilevel medium voltage ESS, establishes the off-grid model of H-bridge cascaded medium voltage ESS, proposes the off-grid voltage control strategy for medium voltage ESS with containing both AC voltage outer loop and current inner loop, and presents the compensation control method according to the three-phase voltage unbalance caused by the one-phase load during off-grid operation. Then, we build a real-time simulation system in MATLAB/RT_LAB to verify the above control methods. The results show that, when the three-phase load is symmetrical the load terminal voltage is constant and the current in the inner control loop can follow it reference exactly； when the three-phase load is unbalanced, the load terminal three-phase voltage can still be kept symmetrical after the voltage compensation, and the three-phase load current is different depending on the value of the each phase load. The simulation results show the effectiveness of the proposed off-grid control method for the H-bridge cascaded medium voltage ESS.

Key words: medium voltage energy storage system, off-grid control, H-bridge cascaded converter

中图分类号:

TM 92

陈辉，王德顺，殷正刚，吴敏秀，师长立，汪建威. 级联H桥中压储能系统离网控制策略[J]. 电力建设, 2017, 38(3): 69-.

CHEN Hui, WANG Deshun，YIN Zhenggang, WU Minxiu, SHI Changli, WANG Jianwei. Off-Grid Control Strategies for H-Bridge Cascaded Medium Voltage Energy Storage System[J]. Electric Power Construction, 2017, 38(3): 69-.

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级联H桥中压储能系统离网控制策略

Off-Grid Control Strategies for H-Bridge Cascaded Medium Voltage Energy Storage System

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