Research on the Control Strategy of Inverters in the Micro-Grid

Ren, Biying; Tong, Xiangqian; Tian, Sha; Sun, Xiaodong

doi:10.1109/appeec.2010.5448341

Cited by 23 publications

(11 citation statements)

References 4 publications

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“…The simulation model of the proposed system is shown in Figure 5. Two cases are investigated in this section; the first case includes the performance of the proposed controller during a change in MGS operation mode considering the optimisation objectives as given in Equations (12)- (14). The second case investigates the performance of controller when the load varies, for which the control objectives as described in Equations (12), (13) and (15) are considered.…”

Section: Case Studies and Proposed Test Systemmentioning

confidence: 99%

“…Methods for analyzing system dynamic stability while improving the system reliability and the parameters required for analysis and design of PV/Wind hybrid system are given at [12]. The types of controllers utilized for microgrids (PQ and Vf), the criteria for power-sharing between the grid and MG during the grid-connected mode of MG and performance of MGS during islanding mode have also been analysed in [13][14][15]. However, these systems did not consider the tuning of control parameters, which may be required during the transition of MGS operating modes or load variation.…”

Section: Introductionmentioning

confidence: 99%

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Regulation of Voltage and Frequency in Solid Oxide Fuel Cell-Based Autonomous Microgrids Using the Whales Optimisation Algorithm

et al. 2018

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This study explores the Whales Optimization Algorithm (WOA)-based PI controller for regulating the voltage and frequency of an inverter-based autonomous microgrid (MG). The MG comprises two 50 kW DGs (solid oxide fuel cells, SOFCs) interfaced using a power electronics-based voltage source inverter (VSI) with a 120-kV conventional grid. Four PI controller schemes for the MG are implemented: (i) stationary PI controller with fixed gain values (Kp and Ki), (ii) PSO tuned PI controller, (iii) GWO tuned PI controller, and (iv) WOA tuned PI controller. The performance of these controllers is evaluated by monitoring the system voltage and frequency during the transition of MG operation mode and changes in the load. The MATLAB/SIMULINK tool is utilised to design the proposed model of grid-tied MG alongside the MATLAB m-file to apply an optimisation technique. The simulation results show that the WOA-based PI controller which optimises the control parameters, achieve 62.7% and 59% better results for voltage and frequency regulation, respectively. The eigenvalue analysis is also provided to check the stability of the proposed controller. Furthermore, the proposed system also satisfies the limits specified in IEEE-1547-2003 for voltage and frequency.

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Section: Case Studies and Proposed Test Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Regulation of Voltage and Frequency in Solid Oxide Fuel Cell-Based Autonomous Microgrids Using the Whales Optimisation Algorithm

et al. 2018

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“…Microgrids are active low‐voltage or medium‐voltage distribution grids composed of sets of linear and nonlinear loads, distributed generation (DG) sources, and control devices that can be operated through the connected and islanded modes . The use of power converters and nonlinear loads creates many power quality problems . Multimicrogrid (MMG) is a combination of two or more microgrids on the basis of renewable energy sources and local loads, integrated at a common point of coupling.…”

Section: Introductionmentioning

confidence: 99%

“…1,2 The use of power converters and nonlinear loads creates many power quality problems. 3,4 Multimicrogrid (MMG) is a combination of two or more microgrids on the basis of renewable energy sources and local loads, integrated at a common point of coupling. The nonlinear resources and loads in MMG cause many power quality problems.…”

Section: Introductionmentioning

confidence: 99%

Power quality improvement of multimicrogrid using improved custom power device called as distributed power condition controller

Esmaeili

Shayeghi

Valipour

et al. 2019

Int Trans Electr Energ Syst

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Summary The aim of this paper is to improve power quality in a multimicrogrid (MMG) with high penetration of various distributed generators in island and interconnected mode using an improved custom power device called distributed power condition controller (DPCC). The DPCC is an improved, low‐cost, reliable combined custom power device to compensate simultaneously the voltage drop, harmonic distortions, and feeder losses in the MMG, which includes the verity of nonlinear source. It has great market potential and has been selected as the solution for more specific applications. The capability of the DPCC is increased by discrete fuzzy‐based PI controller. In addition, the power injection model of DPCC is presented. Two different case studies corresponding to the island mode and high penetration of renewable generation and nonlinear load in connected mode are considered. According to theoretical studies and simulation results, DPCC successfully improves power quality of the MMGs.

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“…PQ control diagram and V/f control diagram are as given in Figure 2 and Figure 3 respectively [8]. PQ control takes dual-loop control structure.…”

Section: Control Modes For Dgsmentioning

confidence: 99%

Micro-Grid Smooth Switchover Method Based on Controller State Following

Fu¹,

Huang²,

Zhao³

2015

JPEE

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Micro-grid smooth switchover between different operation modes is important for steady operation and reliable power supply of micro-grid. In order to reduce the transient fluctuation of voltage and frequency during switchover, this paper proposed a new switchover method based on controller state following. When transferring to island mode, the control method for inverter of storage device changed from PQ control to V/f control. Before switchover, the output of V/f controller is always following the output of PQ controller. So that the sudden change of output is avoided at the moment of switchover. A micro-grid model with photovoltaic and battery is built on DIgSILENT Power Factory simulation software, to simulate micro-grid switchover from grid-connected mode to island mode. Results show this method can effectively suppress the transient fluctuation of voltage and frequency, and reduce the influence of transient process on power grid. This conclusion has important practical significance on micro-grid smooth switchover from grid-connected mode to island mode.

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Research on the Control Strategy of Inverters in the Micro-Grid

Cited by 23 publications

References 4 publications

Regulation of Voltage and Frequency in Solid Oxide Fuel Cell-Based Autonomous Microgrids Using the Whales Optimisation Algorithm

Regulation of Voltage and Frequency in Solid Oxide Fuel Cell-Based Autonomous Microgrids Using the Whales Optimisation Algorithm

Power quality improvement of multimicrogrid using improved custom power device called as distributed power condition controller

Micro-Grid Smooth Switchover Method Based on Controller State Following

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