Control and Stability Improvement of Combined Wind-battery System with a Permanent Magnet Synchronous Generator Supplying Active Load

Document Type : Original Article

Authors

Department of Electrical and Computer Engineering, University of Kashan, Kashan, Iran

Abstract

This paper deals with the control and stability enhancement of a wind-power generation system feeding active load with constant power characteristic. The under-study system is a combined wind-battery generation system with a permanent magnet synchronous generator (PMSG) supplying active load by using interfaced power electronics converters. The employed active load is indeed an active rectifier behaving like a constant power load (CPL). Since CPLs from the small-signal point of view behave like negative resistances, they result in stability margin reduction and even in system instability at higher load power penetration. In this paper, as the novelty, a control approach was presented which results in system stability at the presence of active loads. In other words, by using the proposed control method, the output impedance of the load-side converter at low frequencies converged to zero; this, in turn, resulted in the improvement of system stability margin under the presence of active loads. At the end, the performance of the study system with active loads was examined by time domain simulations and with/without the proposed control method.

Keywords

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References

 
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Energy Engineering and Management
Volume 13, Issue 1
March 2023
Pages 12-29

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