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
Droop controller comparison for AC microgrids
TL;DR: In this paper, three droop control schemes are selected to regulate voltage, frequency and power sharing without using communication links and complex measurement systems, and an analysis regarding their differences is given in terms of voltage and frequency sharing performance.
Journal ArticleDOI
Adaptive Slope Voltage Control for Distributed Generation Inverters With Improved Transient Performance
TL;DR: An adaptive slope voltage control that provides an improved transient performance against operating variations is presented and a control-oriented mathematical model is developed.
Proceedings ArticleDOI
Enhanced mode adaptive decentralized controller for inverters supplying a multi-bus microgrid
Xinyao Li,Adam Dysko,Graeme Burt +2 more
TL;DR: A new decentralized controller for inverters supplying a multi-bus microgrid is developed, improves the operational stability by minimizing the output voltage and angle differences between IIGs and permits a mode-adaptive operation for both grid-connected and islanded state.
Proceedings ArticleDOI
Analysis, modelling, and simulation of droop control with virtual impedance loop applied to parallel UPS systems
Francisco Kleber A. Lima,Carlos Gustavo C. Branco,Josep M. Guerrero,Luis Juarez C. B. C. Neto,Samuel da Silva Carvalho,Rene P. Torrico-Bascope +5 more
TL;DR: This paper has considered that the UPS systems there were no communication between their controls, and a detailed mathematical model about the explored system and simulation results are presented in order to prove the theory presented.
Proceedings ArticleDOI
Decentralised Energy Market for Implementation into the Intergrid Concept - Part 2: Integrated System
TL;DR: The simulation results contained here-within verify the hypothesis predicted within the companion paper - the hierarchical scaling of the transactive energy market may reduce the market fluctuations due to increased competition and availability of supply.
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.