A Simple Zero-Sequence-Voltage-Based Cluster Voltage Balancing Control and the Negative Sequence Current Compensation Region Identification for Star-Connected Cascaded H-Bridge STATCOM
A Simple Zero-Sequence-Voltage-Based Cluster Voltage Balancing Control and the Negative Sequence Current Compensation Region Identification for Star-Connected Cascaded H-Bridge STATCOM
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一种简单的基于零序电压的星形连接级联H桥STATCOM集群电压平衡控制和负序电流补偿区域识别
DOI：
10.1109/tpel.2017.2785239
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发表时间：
2018-10
影响因子：
6.7
通讯作者：
Haibing Hu
中科院分区：
文献类型：
--
作者：
Daorong Lu;Jianxin Zhu;Jiangfeng Wang;Jianhui Yao;Sen Wang;Haibing Hu
在某些应用情况下，星形连接级联h桥静态同步补偿器（CHB STATCOM）需要同时进行正序和负序无功补偿。然而，相电流/电压的不平衡将导致三个簇间有功潮流的不均匀，这使得簇电压平衡更具挑战性。在这种情况下，只有零序电压可用来平衡集群电压。虽然可以根据各相簇有功功率的平衡计算出各种工况下的零序电压，但由于零序电压在abc或dq0坐标系中以三角函数的形式表示，计算肯定比较复杂。本文通过引入一个几乎正交的零序电压，在dq帧中以直流形式表示零序电压。建立了有功功率与零序电压之间的线性关系，并在此基础上提出了一种计算量小的简单零序电压计算方法。在考虑负序电流初始相角的情况下，通过建立最大变流器电压与负序电流的关系，确定了负序电流注入的精确补偿区域，同时利用零序电压控制保持了簇电压的平衡。通过400 V/±7.5 kVAr星形连接CHB STATCOM的仿真和实验结果验证了所提控制和补偿区域的有效性。
In some application circumstances, both positive and negative sequence reactive power compensations are desired from the star-connected cascaded H-bridge static synchronous compensator (CHB STATCOM). However, the imbalanced phase currents/voltages will cause uneven active power flow among three clusters, which makes the cluster voltage balance more challenging. In this scenario, only zero sequence voltage is available to balance the cluster voltages. Although the zero sequence voltage can be calculated in all operating conditions based on the equilibrium of the active power for each phase cluster, the calculation is definitely complicated due to the zero sequence voltage expressed in the form of trigonometric function in the abc or dq0 frame. In this paper, the zero sequence voltage is represented in a dc form in the dq frame through introducing a virtually orthogonal zero sequence voltage. As a result, a linear relationship between the active powers and the zero sequence voltage is established, based on which, a simple zero sequence voltage calculation method is proposed with a small calculation burden. Furthermore, the accurate compensation region for the negative sequence current injection is identified by establishing the relationship between the maximum converter voltage and the negative sequence currents taking into consideration the initial phase angle of the negative sequence currents, while still keeping the cluster voltage balanced by using the zero sequence voltage control. The effectiveness of the proposed control and the compensation region are verified by the simulation and experimental results on a 400 V/±7.5 kVAr star-connected CHB STATCOM.
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影响因子：
7.7
作者：
Song, HS;Nam, K
通讯作者：
Nam, K
DOI：
10.1109/apec.2016.7468171
发表时间：
2016-03
期刊：
2016 IEEE Applied Power Electronics Conference and Exposition (APEC)
影响因子：
--
作者：
Daorong Lu;Haibing Hu;Y. Xing;Xiaobin He;K. Sun;Jianhui Yao
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星形级联H桥STATCOM集束式电压平衡机制及其控制策略
影响因子：
7.7
作者：
Lu Daorong;Wang Jiangfeng;Yao Jianhui;Wang Sen;Zhu Jianxin;Hu Haibing;Zhang Li
通讯作者：
Zhang Li
影响因子：
4.4
作者：
Chia-tse Lee;Bo-siang Wang;Sheng-wan Chen;Shih-Feng Chou;Jun Huang;Po-tai Cheng;H. Akagi;P. Barbosa
通讯作者：
Chia-tse Lee;Bo-siang Wang;Sheng-wan Chen;Shih-Feng Chou;Jun Huang;Po-tai Cheng;H. Akagi;P. Barbosa
DOI：
10.1109/ias.1995.530626
发表时间：
1995-10
期刊：
IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting
影响因子：
--
作者：
F. Peng;Johnny Lai
通讯作者：
F. Peng;Johnny Lai