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
Control of line interactive UPS systems in a Microgrid
TL;DR: In this paper, a line interactive Uninterruptable Power Supply (UPS) system in a microgrid is considered, where power flow is controlled using the frequency and voltage drooping technique to ensure seamless transfer between grid connected and parallel islanding modes of operation.
Proceedings ArticleDOI
Unified compensation control of a hybrid energy storage system for enhancing power quality and operation efficiency in a diesel and wind-turbine based stand-alone microgrid
TL;DR: In this article, the authors presented a unified compensation control strategy of a hybrid electric energy storage system in order to improve power quality and operating efficiency in a diesel and wind-turbine based stand-alone microgrid.
Proceedings ArticleDOI
Reactive power compensation for parallel inverters without control interconnections in microgrid
TL;DR: In this article, a control technique for parallel inverters with no control interconnections in microgrid is developed based on droop control method and virtual impedance method, which uses only locally measurable feedback signals to make some of the parallel inverter supply only reactive power equally for loads while the others share only active power.
Proceedings ArticleDOI
Control of microgrid — A review
B. Satish,S. Bhuvaneswari +1 more
TL;DR: In this paper, the authors give an insight of microgrid control and discuss various aspects related to it, including power electronic interfaces with control strategies, power storage devices, distribution network, loads and hierarchical control and management networks.
Journal ArticleDOI
A survey on power management strategies of hybrid energy systems in microgrid
TL;DR: This paper presents a survey of the research works already reported focusing on power management of hybrid energy systems such as mainly solar and wind systems in microgrid, and six different approaches have been studied in detail.
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.