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
Small-Signal Modeling and Analysis of Combination-Configuration Microgrid Based on Droop Control
Jun Gu,Xing Zhang,Shanshou Li +2 more
TL;DR: In this paper, the influence of system parameters on the stability and dynamic performance of combination-configuration microgrid based on droop control is established at the point of steady state, by calculating the eigenvalues of state matrix, the small-signal stability of combination configuration microgrid can be directly analyzed.
Journal ArticleDOI
A Reference Compensation Current Control strategy for Grid-Connected Inverter of Three-Phase Distributed Generators
Yunqing Zhang,Shaoru Zhang,Pingjun Wang,Lijun Wang,Ruiye Zhang,Xiaobo Liu,Lingling Liu,Yuanyuan Wu +7 more
TL;DR: In this article, a novel control strategy implementing reference compensation current was proposed in 3-phase 4-wire distribution systems, where the inverter is controlled to perform as a multi-function device by incorporating active power filter functionality.
Journal ArticleDOI
A Power Sharing Method for Parallel Inverters with Virtual Synchronous Generator Control Strategy
TL;DR: In this paper, a new power sharing method of a virtual sychronous generator control based inverters is introduced, where the relation between the droop control and the line impedance is analyzed at first.
Proceedings ArticleDOI
A Corrective Scheme to Prevent Adverse Dynamic Interaction of Grid-forming Inverters
TL;DR: In this paper , the authors proposed a force enclaved homogenization (FEH) control to prevent the adverse dynamic interactions between the heterogeneously controlled grid-forming inverters in power electronics dominated grid towards a resilient self-driving grid.
Journal ArticleDOI
Reduced Order AC Microgrid Model for Secondary Controller Design Using dq Reference Frame
Oʻktamaliyeva Goʻzalxon Anvarjon qizi, Rahmatullayeva Parizod Tohirjon qizi, Ibrohimova Nargizaxon …
TL;DR: In this paper , a reduced order, linear, inverter based, microgrid model based on the dq reference frame is developed and validated via a time domain simulation in the MATLAB/SIMULINK environment.
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.