Study of AC/DC power supply system with DGs using parallel processing method

Yukita, Kazuto; Shimizu, Yoshiaki; Goto, Yasuyuki; Yoda, Masaki; Ueda, Atsushi; Ichiyanagi, Katsuhiro; Hirose, Keikichi; Takeda, Takashi; Ota, Takuya; Okui, Y.; Takabayashi, Hiroyuki

doi:10.1109/ipec.2010.5544599

Cited by 14 publications

(6 citation statements)

References 3 publications

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“… Economical operation [13][14][15]: Economical operation in DC microgrids can be achieved without complex and computation-intensive optimization algorithms and as pointed out in the existing literature, the total cost of ownership, infrastructure, equipment, maintenance and operation are lower in DC microgrids.  Efficiency [16][17][18]: The system efficiency becomes higher due to the reduction of conversion losses of inverters between DC output sources and loads. DC microgrids already have a fault-ride-through capability of their own due to the stored energy of the DC capacitor and the voltage control of the AC/DC converter.…”

Section: State-of-the-art Of DC Microgridsmentioning

confidence: 99%

Enhanced Load Power Sharing Accuracy in Droop-Controlled DC Microgrids with Both Mesh and Radial Configurations

Liu

Wang

et al. 2015

Energies

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The rational power sharing among different interface converters should be determined by the converter capacity. In order to guarantee that each converter operates at the ideal condition, considering the radial and mesh configuration, a modified strategy for load power sharing accuracy enhancement in droop-controlled DC microgrid is proposed in this paper. Two compensating terms which include averaging output power control and averaging DC voltage control of neighboring converters are employed. Since only the information of the neighboring converter is used, the complexity of the communication network can be reduced. The rational distribution of load power for different line resistance conditions is realized by using modified droop control that can be regarded as a distributed approach. Low bandwidth communication is used for exchanging sampled information between different converters. The feasibility and effectiveness of the proposed method for different network configurations and line resistances under different communication delay is analyzed in detail. Simulation results derived from a DC microgrid with three converters is implemented in MATLAB/Simulink to verify the proposed approach. Experimental results from a 3 × 10 kW prototype also show the performance of the proposed modified droop control scheme.

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Section: State-of-the-art Of DC Microgridsmentioning

confidence: 99%

Enhanced Load Power Sharing Accuracy in Droop-Controlled DC Microgrids with Both Mesh and Radial Configurations

Liu

Wang

et al. 2015

Energies

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“…LPF is neglected due to few losses in (3). DC bus voltage V dc is regulated by the P control in (4).…”

Section: B Control Of Power Leveling and Invertermentioning

confidence: 99%

“…New power supply systems, such as a smart grid using distributed generators are expanding [1]- [4]. Since the output of renewable power sources has fluctuation and instability, however, problems of reverse power flow and voltage optimization occur.…”

Section: Introductionmentioning

confidence: 99%

Deadbeat control of power leveling unit with bidirectional buck/boost DC/DC converter

Hamasaki

Mukai

Yano

et al. 2014

2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA)

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Abstract-As a distributed generation system increases, a stable power supply becomes difficult. Thus control of power leveling (PL) unit is required to maintain the balance of power flow for irregular power generation. The unit is required to respond to change of voltage and bidirectional power flow. So the bidirectional buck/boost DC/DC converter is applied for the control of PL unit in this research. The PL unit with Electric double-layer capacitor (EDLC) is able to absorb change of power, and it is examined whether the stable power supply is possible. The output current of PL unit is controlled so as to keep power balance and DC bus voltage. The effectiveness of the deadbeat control for power leveling unit is proved in simulation and experiment.

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“…Aichi microgrid system is located in Aichi Institute of Technology (AIT), Japan [31]. Building 12 and Library are interconnected to exchange the power between the areas depending on the power availability and the load demand.…”

Section: Introductionmentioning

confidence: 99%

“…A bidirectional converter is used between ac/dc bus for controlling the power flow among the sources and load. The uniqueness of this test system is that no outage can be incurred in the system even in the case of utility grid failure [31]. The system consists of a solar system, two wind turbines and battery that have dedicated DC-DC converters with controllers to maintain output voltage constant under variable input conditions.…”

Section: Introductionmentioning

confidence: 99%

Coordinated Control of Aichi Microgrid for Efficient Power Management Using Novel Set Point Weighting Iterative Learning Controller

Angalaeswari

Kamaraj

2020

Energies

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A novel Set Point Weighting Iterative Learning Controller (SPW-ILC) has been proposed for voltage stabilization at AC/DC bus, coordinated control among the distributed sources in the modeled hybrid microgrid (HMG) and synchronization of HMG with utility grid. The Aichi Micro grid test system located at Aichi Institute of Technology, Japan has been considered for the simulation studies and modeled in MATLAB/Simulink environment. The Aichi microgrid can be operated in autonomous mode as AC system and DC system. When it is working as DC system, the dc bus voltage is maintained stable by incorporating dedicated fuzzy logic controllers (FLC) for DC-DC converters due to the variable distributed sources. Meanwhile, the bidirectional converter also called as Interlinking Converter (IC) located between ac bus and dc bus controlled by proposed SPW-ILC converts the DC voltage into AC voltage and meets AC loads. In AC system of autonomous mode, the inverters are controlled by proposed controller to meet the ac demands. The grid connected mode of Aichi microgrid system is performed by properly controlling the IC to meet ac and dc loads. The proposed SPW-ILC reduces the voltage deviation and maintains the power balance under variable source and load conditions. The results have been compared with the conventional proportional integral (PI) controller and FLC to validate the performance of the controller. The results show that the proposed SPW-ILC has efficiently control the voltage and maintain the power balance.

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Study of AC/DC power supply system with DGs using parallel processing method

Cited by 14 publications

References 3 publications

Enhanced Load Power Sharing Accuracy in Droop-Controlled DC Microgrids with Both Mesh and Radial Configurations

Enhanced Load Power Sharing Accuracy in Droop-Controlled DC Microgrids with Both Mesh and Radial Configurations

Deadbeat control of power leveling unit with bidirectional buck/boost DC/DC converter

Coordinated Control of Aichi Microgrid for Efficient Power Management Using Novel Set Point Weighting Iterative Learning Controller

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