Design of a Modular UPQC Configuration Integrating a Components Economical Analysis

A design procedure to select the components in a modular unified power-quality conditioner configuration based on single-phase cells is presented. The procedure is based on the fact that the load and distributor operating conditions range are known and it is required to impose stiff operating conditions in both the load side (regulation) and the point of common coupling side (power factor). Due to the arbitrary number of cells to be used in a modular approach, the proposed design procedure allows to select the power semiconductors and capacitors based on an economical evaluation, so an optimal number of cells can be chosen to minimize the overall power cell cost. This design procedure is well suited for modular configurations, where several degrees of freedom are not covered if just technical criteria are followed. Thus, an economic approach can be used to select the appropriate components. The rest of the devices, i.e., the transformers turn ratio and passive filters, are chosen using classical design methods based on technical issues such that the power cells operate within its permissible ratings. A practical case evaluation is presented for a medium voltage system application.

[1]  M. B. Hughes,et al.  Interpreting recent power quality surveys to define the electrical environment , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[2]  A. Domijan,et al.  Custom power devices: an interaction study , 2005, IEEE Transactions on Power Systems.

[3]  D. J. Adams,et al.  A power line conditioner using cascade multilevel inverters for distribution systems , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[4]  H. Wayne Beaty,et al.  Electrical Power Systems Quality , 1995 .

[5]  Hirofumi Akagi,et al.  The unified power quality conditioner: the integration of series- and shunt-active filters , 1998 .

[6]  J.R. Espinoza,et al.  A Novel Multi-Level Three-Phase UPQC Topology based on Full-Bridge Single-Phase Cells , 2007, IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society.

[7]  B. Han,et al.  Dynamic Characteristic Analysis of SSSC Based on the Multibridge Inverter , 2002, IEEE Power Engineering Review.

[8]  Yong Kang,et al.  A novel control scheme in 2-phase unified power quality conditioner , 2003, IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468).

[9]  Mauricio Aredes,et al.  An universal active power line conditioner , 1998 .

[10]  D. M. Vilathgamuwa,et al.  Design and Analysis of the Inverter-Side Filter Used in the Dynamic Voltage Restorer , 2002, IEEE Power Engineering Review.

[11]  J.R. Espinoza,et al.  Operating Region of Single-Phase UPQCs , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[12]  Matti Lehtonen,et al.  Voltage sag distributions caused by power system faults , 2003 .

[13]  J.R. Espinoza,et al.  Analysis and design of a linear control strategy for three-phase UPQCs , 2004, 30th Annual Conference of IEEE Industrial Electronics Society, 2004. IECON 2004.

[14]  Hirofumi Akagi,et al.  Control and analysis of a unified power flow controller , 1998 .

[15]  Juan W. Dixon,et al.  A simple and low-cost control strategy for active power filters connected in cascade , 1997, IEEE Trans. Ind. Electron..

[16]  Paolo Mattavelli,et al.  Operation analysis of novel UPFC based on 3-level half-bridge modules , 2003, 2003 IEEE Bologna Power Tech Conference Proceedings,.

[17]  S. S. Choi,et al.  On the injection transformer used in the dynamic voltage restorer , 2000, PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409).

[18]  B. Han,et al.  New configuration of UPQC for medium-voltage application , 2006, IEEE Transactions on Power Delivery.

[19]  R. J. Nelson,et al.  UPFC application on the AEP system: planning considerations , 1997 .

[20]  T. S. Key,et al.  Comparison of standards and power supply design options for limiting harmonic distortion in power systems , 1993 .