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
Control Architecture for Parallel-Connected Inverters in Uninterruptible Power Systems
TL;DR: In this article, a control strategy for the parallel operation of three-phase inverters forming an online uninterruptible power system (UPS) is presented, which consists of a cluster of paralleled inverters with LC filters directly connected to an ac critical bus and an ac/dc forming a dc bus.
Journal ArticleDOI
Improved droop control strategy for grid-connected inverters
TL;DR: In this article, an improved control strategy for grid-connected inverters within microgrids is presented, which is based on the classical P − ω and Q − V droop method.
Journal ArticleDOI
A Dynamic Consensus Algorithm to Adjust Virtual Impedance Loops for Discharge Rate Balancing of AC Microgrid Energy Storage Units
TL;DR: A dynamic consensus algorithm (DCA)-based coordinated secondary control with an autonomous current-sharing control strategy is proposed in this paper for balancing the discharge rate of energy storage systems (ESSs) in an islanded ac microgrid.
Journal ArticleDOI
Hybrid Microgrid With Parallel- and Series-Connected Microconverters
TL;DR: In this paper, a hierarchical power regulation method is developed with simultaneous point of common coupling (PCC) voltage and microconverter voltage control for grid-tied and islanding microgrid control with proper power sharing.
Journal ArticleDOI
Joint Optimization of Control Performance and Network Resource Utilization in Homogeneous Power Networks
TL;DR: A framework that jointly optimizes the control and communication networks of network-controlled interactive power electronics networks is described in this paper and three different implementation approaches for the integrated control-communication framework are investigated.
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.