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Steady-State Model and Power Flow Analysis of Electronically-Coupled Distributed Resource Units

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2 Author(s)
Nikkhajoei, H. ; Wisconsin Power Electron. Res. Center, Wisconsin Univ., Madison, WI ; Iravani, R.

This paper presents closed-form steady-state, fundamental-frequency models of power electronic converter systems for coupling distributed resource (DR) units to the utility power grid. Based on the developed models, the paper introduces a two-step power flow analysis approach that accurately and efficiently represents electronically-coupled DR units. A feature of the proposed approach is that it solves for the internal variables of each DR unit in a non-iterative fashion based on the presented closed-form DR models, and thus, enhances efficiency and accuracy of the solution. This papers provides the details for steady-state closed-form formulation of matrix converter and voltage-sourced ac-dc-ac converter for coupling DR units. However, the presented methodology is conceptually applicable to other types of converter systems. An application of the proposed power flow approach to a micro-grid that includes two electronically-coupled DR units is also presented

Published in:

Power Delivery, IEEE Transactions on  (Volume:22 ,  Issue: 1 )

Date of Publication:

Jan. 2007

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