Comprehensive study about stability issues of multi-module distributed system

When the stability issues of multi-module distributed DC power system are analyzed, the physical understandings of terminal characteristics of each module should be focused. According to the proposed analysis method, all the sub-modules are divided into two groups based on the different terminal property types: impedance (Z) type and admittance (Y) type. Equivalent circuits of total system are established to analyze the stability issues and mathematical equations of equivalent circuit are derived. Based on the mathematical equations, two generalized stability criteria for multi-module distributed system have been proposed. In this paper, comparisons between the two stability criteria are made and comprehensive study about stability issues in multi-module system is made through the comparison.

[1]  Liu Fangcheng,et al.  Stability issues of Z+Z or Y+Y type cascade system , 2013, 2013 IEEE Energy Conversion Congress and Exposition.

[2]  Zhang Bin,et al.  General impedance/admittance stability criterion for cascade system , 2013, 2013 IEEE ECCE Asia Downunder.

[3]  Jinjun Liu,et al.  The stability analysis and determination of multi-module distributed power electronic systems , 2010, The 2nd International Symposium on Power Electronics for Distributed Generation Systems.

[4]  Zhang Bin,et al.  Unified stability criterion of bidirectional power flow cascade system , 2013, 2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[5]  George C. Verghese,et al.  Analysis and control design of paralleled DC/DC converters with current sharing , 1998 .

[6]  M. Valentin,et al.  Current Fed and Voltage Fed Switching DC/DC Converters - Steady State and Dynamic Models their Applications in Space Technology , 1983, INTELEC '83 - Fifth International Telecommunications Energy Conference.

[7]  Charles K. Alexander,et al.  Fundamentals of Electric Circuits , 1999 .

[8]  Slobodan Cuk,et al.  A general unified approach to modelling switching-converter power stages , 1976, 1970 IEEE Power Electronics Specialists Conference.

[9]  F. C. Lee,et al.  Analysis and design of N paralleled DC-DC converters with master-slave current-sharing control , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

[10]  Xiaogao Xie,et al.  Analysis and design of N paralleled DC/DC modules with current-sharing control , 2006 .

[11]  Fangcheng Liu,et al.  Generalized Stability Criterion for Multi-module Distributed DC System , 2014 .

[12]  Morris Driels,et al.  Linear Control Systems Engineering , 1995 .

[13]  Jian Sun,et al.  Impedance-Based Stability Criterion for Grid-Connected Inverters , 2011, IEEE Transactions on Power Electronics.

[14]  Teuvo Suntio,et al.  Issues on Solar-Generator Interfacing With Current-Fed MPP-Tracking Converters , 2010, IEEE Transactions on Power Electronics.

[15]  Jinjun Liu,et al.  Terminal admittance based stability criterion for multi-module DC distributed system , 2014, 2014 IEEE Applied Power Electronics Conference and Exposition - APEC 2014.