Journal ArticleDOI
A wireless controller to enhance dynamic performance of parallel inverters in distributed generation systems
TLDR
In this paper, a novel control strategy for parallel inverters of distributed generation units in an AC distribution system is presented, based on the droop control method, using only locally measurable feedback signals.Abstract:
This paper presents a novel control strategy for parallel inverters of distributed generation units in an AC distribution system. The proposed control technique, based on the droop control method, uses only locally measurable feedback signals. This method is usually applied to achieve good active and reactive power sharing when communication between the inverters is difficult due to its physical location. However, the conventional voltage and frequency droop methods of achieving load sharing have a slow and oscillating transient response. Moreover, there is no possibility to modify the transient response without the loss of power sharing precision or output-voltage and frequency accuracy. In this work, a great improvement in transient response is achieved by introducing power derivative-integral terms into a conventional droop scheme. Hence, better controllability of the system is obtained and, consequently, correct transient performance can be achieved. In addition, an instantaneous current control loop is also included in the novel controller to ensure correct sharing of harmonic components when supplying nonlinear loads. Simulation and experimental results are presented to prove the validity of this approach, which shows excellent performance as opposed to the conventional one.read more
Citations
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Journal ArticleDOI
Nonlinear analysis and estimation of the domain of attraction for a droop controlled microgrid system
TL;DR: In this article , a nonlinear model is developed for a dynamic droop controlled microgrid system where the emphasis is laid on the effects of dynamic droops gains on disturbance rejection, and a Lyapunov based stability analysis is performed to estimate the domain of attraction for the dynamic controlled micro-grid system by using Takagi-Sugeno method.
Journal ArticleDOI
Modelling and Simulation of Hierarchical Control for AC Inductive Microgrids
TL;DR: This paper presents and analyzes a four level hierarchical control for MGs based on droop control, mainly focusing on Secondary and Tertiary control in order to minimize its limitations.
A decentralized self-adjusting control strategy for reactive power management in an islanded multi-bus MV microgrid Une stratégie autorégulée décentralisée pour le contrôle de la puissance réactive dans un micro-réseau multi-bus MV isolé
TL;DR: In this article, a decentralized self-adjusting reactive power controller for the autonomous operation of a multi-bus medium voltage (MV) microgrid is presented, which includes an improved droop controller whose parameters are adjusted according to the reactive power of the local loads.
Journal ArticleDOI
A power electronic converter-based microgrid model for simulation studies
Darlan Ioris,Paulo Thiago de Godoy,Kim Diefrei Remboski Felisberto,Patricia Poloni,Adriano Batista de Almeida,Diogo Marujo +5 more
TL;DR: This paper aims to propose a power electronic converter-based MG benchmark with the fundamental theory about MG control, operation and modeling, besides functional examples of MG operation, providing a reference to implement a MG model.
References
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Journal ArticleDOI
Control of parallel connected inverters in stand-alone AC supply systems
TL;DR: In this article, a control scheme for parallel-connected inverters in a standalone AC supply system is presented, which uses feedback of only those variables that can be measured locally at the inverter and does not need communication of control signals between the inverters.
Book
Power Systems Analysis
TL;DR: In this article, the authors present a model of a single machine-infinite bus (SIB) with three-phase transformer connections for the purpose of detecting faults in a generator.
Journal ArticleDOI
Parallel operation of voltage source inverters
T. Kawabata,S. Higashino +1 more
TL;DR: In this paper, the authors discuss the problem of parallel operating systems of voltage source inverters with other inverters or with the utility source and propose several methods for protection against failure.
Journal ArticleDOI
Sharing of nonlinear load in parallel connected three-phase converters
TL;DR: In this article, a new control method is presented which enables equal sharing of linear and nonlinear loads in three-phase power converters connected in parallel, without communication between the converters.
Proceedings ArticleDOI
Parallel operation of single phase inverter modules with no control interconnections
TL;DR: In this article, the authors developed a control technique for operating two or more single phase inverter modules in parallel with no auxiliary interconnections, using frequency, fundamental voltage, and harmonic voltage droop to allow independent inverters to share the load in proportion to their capacities.