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
速応性とロバスト性を考慮した並列接続インバータの比例負荷分担達成のための分散制御;速応性とロバスト性を考慮した並列接続インバータの比例負荷分担達成のための分散制御;Decentralized Control of Parallel-connected Inverters to Achieve Proportional Load Sharing with a Fast Response and Robustness
Daisuke Ura,Yamamoto Shigeru +1 more
Dissertation
Modeling, control and design of AC microgrids in islanded mode
Rey López,Juan Manuel +1 more
TL;DR: An improved secondary control layer strategy without communications is presented, which presents superior operating performance compared with the previous proposals and is submitted as a compendium of publications, composed by journals and international conference papers.
Proceedings ArticleDOI
The control strategy of photovoltaic energy storage system based on virtual synchronous generator
Xiangwu Yan,Liwen Dong +1 more
TL;DR: The virtual synchronous generator second order model is introduced to provide control strategy for photovoltaic energy storage system and the simulation model is established to simulate control strategy.
DissertationDOI
Grid integration and coordinated control of voltage source inverters with energy storage systems
Proceedings ArticleDOI
Network-Based Finite-Time Secondary Level Control for Critical Bus Voltage Restoration and Accurate Reactive Power-Sharing
TL;DR: In this article , a finite-time distributed secondary level control of an islanded AC microgrid based on communication network among distributed generators is proposed to achieve precise voltage regulation and accurate reactive power sharing within clusters of DGs that might contain a common node, along with attaining frequency restoration.
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.