Constant Power Loads (CPL) with Microgrids: Problem Definition, Stability Analysis and Compensation Techniques

Mohammed Kh. AL-Nussairi, Ramazan Bayindir, Sanjeevikumar Padmanaban, Lucian Mihet-Popa and Pierluigi Siano
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Mohammed Kh. AL-Nussairi: Department of Electrical Engineering, College of Engineering, University of Misan, Al-Amarah, Misan 62001, Iraq
Ramazan Bayindir: Department of Electrical and Electronic Engineering, Faculty of Engineering, Gazi University, Besevler, Ankara 06500, Turkey
Sanjeevikumar Padmanaban: Department of Electrical and Electronics Engineering Science, University of Johannesburg, Auckland Park, Johannesburg 2006, South Africa
Lucian Mihet-Popa: Faculty of Engineering, Østfold University College, Kobberslagerstredet 5, 1671 Kråkeroy, Norway
Pierluigi Siano: Department of Industrial Engineering, University of Salerno, Salerno, 84084 Fisciano (SA), Italy

Energies, 2017, vol. 10, issue 10, 1-20

Abstract: This paper provides a comprehensive review of the major concepts associated with the ?grid, such as constant power load (CPL), incremental negative resistance or impedance (INR/I) and its dynamic behaviours on the ?grid, and power system distribution (PSD). In general, a ?grid is defined as a cluster of different types of electrical loads and renewable energy sources (distributed generations) under a unified controller within a certain local area. It is considered a perfect solution to integrate renewable energy sources with loads as well as with a traditional grid. In addition, it can operate with a conventional grid, for example, by energy sourcing or a controllable load, or it can operate alone as an islanding mode to feed required electric energy to a grid. Hence, one of the important issues regarding the ?grid is the constant power load that results from the tightly designed control when it is applied to power electronic converters. The effect of CPL is incremental negative resistance that impacts the power quality of a power system and makes it at negative damping. Also, in this paper, a comprehensive study on major control and compensation techniques for ?grid has been included to face the instability effects of constant power loads. Finally, the merits and limitations of the compensation techniques are discussed.

Keywords: ?grid; power system distribution (PSD); power electronics; power converters; constant power load (CPL); incremental negative resistance (INR); instability effect of CPL; compensation techniques (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (18)

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