Frequency control in micro-grid power system combined with electrolyzer system and fuzzy PI controller

Abstract:In this paper, ultracapacitors are used as short-term storages for the frequency control of grid-connected microgrid that consists of photovoltaic panels, fuel cells, and the battery packs as long-term storages. Fuel cells and battery packs have delays in load tracking; therefore, ultracapacitors are used to compensate for the sudden power fluctuations in the microgrid that occur due to the output power uncertainty of the PV arrays and the loads required in the microgrid, as well as the sudden interruption of the main grid. The microgrid consists of interruptible and uninterruptible loads. When the total produced power in the microgrid, in addition to the purchased power from the grid, cannot satisfy the demand, first, the interruptible loads, and then the uninterruptible loads, are interrupted. In this paper, the forced outage rate of each component and some notions of the reliability are considered for the microgrid.To ensure the system's reliability, the uncertainty of the PV power and load demand is considered.

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“…The deviations for the PV power and loads are simulated close to an actual change wave by the following functions, as presented in [37]:…”

Section: Calculations Of Uncertaintymentioning

confidence: 99%

Optimization of grid-connected microgrid consisting of PV/FC/UC with considered frequency control

HassanzadehFard¹,

Moghaddas-Tafreshi²,

Hakimi³

2015

Turk J Elec Eng & Comp Sci

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“…A single energy storage device cannot satisfy these requirements. Therefore, a composite energy storage system is necessary [7,8]. In this paper, solid oxide fuel cells (SOFCs) are used to supply the basic load to deal with the discontinuous and intermittent wind power fluctuations.…”

Section: Open Accessmentioning

confidence: 99%

“…As shown in [7,8], the wind power fluctuation is derived from white noise, and a low-pass filter is used to eliminate components that are higher than 10,000 s. Then, the fluctuation is multiplied by the standard deviation to determine the output fluctuation. On the other hand, the load fluctuation is generated similarly.…”

Section: Wind Power and Load Modelsmentioning

confidence: 99%

Application of Coordinated SOFC and SMES Robust Control for Stabilizing Tie-Line Power

Zhang

et al. 2013

Energies

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Wind power causes fluctuations in power systems and introduces issues concerning system stability and power quality because of the lack of controllability of its discontinuous and intermittent resources. This paper presents a coordinated control strategy for solid oxide fuel cells (SOFCs) and superconducting magnetic energy storage (SMES) to match the intermittent wind power generation and compensate for the rapid load changes. An optimal H∞ control method, where the weighting function selection is expressed as an optimization problem, is proposed to mitigate tie-line power fluctuations and the mixed-sensitivity approach is used to deal with the interference suppression. Simulation results show that the proposed method significantly improves the smoothing effect of wind power fluctuations. Compared with the conventional control method, the proposed method has better anti-interference performance in various operating situations.

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“…Although the idea of effective renewable energy use as a means of coping with environmental and resource problems, especially of reducing CO 2 emissions, is globally attractive, inappropriate application of distributed renewable power generation systems can be a cause of insecure power supply. That is, the widespread use of various kinds of distributed renewable power sources which would impact the quality of the power supply within a micro-grid power system, causing many control problems (Li et al, 2008). Micro-grid is one such system, consisting of distributed generators, loads, power storage devices and heat recovery equipment, among other components.…”

Section: Introductionmentioning

confidence: 99%

“…Micro-grid is one such system, consisting of distributed generators, loads, power storage devices and heat recovery equipment, among other components. The main advantages of the micro-grid system are that (1) it can be operated independently from conventional utility grids, (2) it can make use of power and heat sources collectively, (3) it can be interconnected to the utility grids at one point (Lasseter et al, 2002;Lasseter & Paigi., 2004;Li et al, 2008). A micro-grid system (see Fig.…”

Section: Introductionmentioning

confidence: 99%

Power Quality Control in Wind/Fuel Cell/Battery/Hydrogen Electrolyzer Hybrid Micro-grid Power System

Li¹,

Dong²,

Lai³

et al. 2011

Applications and Experiences of Quality Control

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Frequency control in micro-grid power system combined with electrolyzer system and fuzzy PI controller

Cited by 190 publications

References 12 publications

Optimization of grid-connected microgrid consisting of PV/FC/UC with considered frequency control

Optimization of grid-connected microgrid consisting of PV/FC/UC with considered frequency control

Application of Coordinated SOFC and SMES Robust Control for Stabilizing Tie-Line Power

Power Quality Control in Wind/Fuel Cell/Battery/Hydrogen Electrolyzer Hybrid Micro-grid Power System

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