Abstract
AbstractA new inter-cluster DC capacitor voltage balancing scheme for a delta connected modular multilevel cascaded converter (MMCC)-based static synchronous compensator (STATCOM) is presented. A detailed power flow analysis of applying negative sequence current (NSC) and zero-sequence current (ZSC) injection methods in addressing the issue of inter-cluster DC voltage imbalance under unbalance grid voltage is carried out. A control scheme is proposed which integrates both inter-cluster methods using a quantification factor QF. This is used to achieve the sharing of the inter-cluster active power between the NSC and ZSC injection methods. An accurate method of determining the quantification factor is also presented. The proposed method offers better sub-module DC capacitor voltage balancing and prevents converter overcurrent. The influence of unbalanced grid voltage on the delta connected MMCC-based STATCOM rating using this integrated cluster balancing technique is investigated. The control scheme is verified with a 5 kV 1.2MVA MMCC-STATCOM using 3-level bridge sub-modules, and the results show the advantages of the proposed method over other inter-cluster methods.
Publisher
Springer Science and Business Media LLC
Subject
Electrical and Electronic Engineering,Energy Engineering and Power Technology,Safety, Risk, Reliability and Quality
Reference22 articles.
1. Oghorada, O. J. K., Nwobu, C. J., & Zhang, L. (2016). Control of a single-star flying capacitor converter modular multi-level cascaded converter (SSFCC-MMCC) STATCOM for unbalanced load compensation, (pp. 1–6).
2. Oghorada, O. J. K., & Zhang, L. (2016). Control of a Modular Multi-level Converter STATCOM for low voltage ride-through condition. In IECON 2016-42nd Annual Conference of the IEEE Industrial Electronics Society, (pp. 3691–3696). IEEE.
3. Akagi, H. (2011). Classification, terminology, and application of the modular multilevel cascade converter (MMCC). IEEE Transactions on Power Electronics, 26(11), 3119–3130. https://doi.org/10.1109/TPEL.2011.2143431.
4. Sano, K., & Takasaki, M. (2012). A transformer less DSTATCOM based on a multi-voltage cascade converter requiring no DC sources. IEEE Transactions on Power Electronics, 27(6), 2783–2795.
5. Hagiwara, M., Maeda, R., & Akagi, H. (2011). Application of a Modular Multilevel Cascade Converter (MMCC-SDBC) to a STATCOM. IEEE Transactions on Industry Applications, 131(12), 1433–1441. https://doi.org/10.1541/ieejias.131.1433.
Cited by
8 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献