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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Proceedings ArticleDOI
Optimal PI Based Secondary Control for Autonomous Micro-Grid via Particle Swarm Optimization Technique
TL;DR: The modeling, analysis, and control strategy of VSIs based autonomous micro-grid are developed and the parameters of secondary controllers are optimized using particle swarm optimization technique to achieve good dynamic and steady state performance for micro- grid voltage and frequency.
Journal ArticleDOI
Optimal control of VSC for STATCOM applications
TL;DR: A voltage source converter (VSC) is configured to perform STATCOM tasks and generate reactive power and an optimal H ∞ controller has been successfully implemented including an anti-windup compensator.
Proceedings ArticleDOI
A hybrid control architecture for low voltage microgrid
TL;DR: In this article, the authors proposed a hybrid control architecture to balance the power shared among the multiple interface inverters and optimize the system operating efficiency for islanding microgrids, where the size and number of the power converters required will depend on the fluctuating power flow within the microgrid.
Journal ArticleDOI
Virtual Resistance Tradeoff Design for DCMG Grid-Forming Converters Considering Static- and Large-Signal Dynamic Constraints
TL;DR: It is found that virtual resistance influence on system stability is opposite to that on voltage deviation; thus, a tradeoff method based on the containment principle is developed.
Journal ArticleDOI
Parallel inverter control using different conventional control methods and an improved virtual oscillator control method in a standalone microgrid
TL;DR: In this article , a particle swarm optimization (PSO)-based virtual oscillator control method (VOC-PSO) is proposed, in which the parameters of the VOC are designed using the PSO algorithm.
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.