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A droop control-based approach of effective power sharing among four parallel inverter-interfaced generators in an islanded microgrid has been proposed in this paper. Droop control strategy is applied during load change in islanded microgrid system in a way that power sharing among all the generators is also equal. This paper describes the small-signal stability analysis method to select the control...
This paper proposes a method for sizing power capacity of the battery energy storage system (BESS) in order to improve power system reliability of a remote area with self-sustainable energy. Microgrid operation is designed to optimally utilize local generations by minimizing tie-line flow from the main grid. The formulated optimization problem can be conveniently solved using linear programming technique...
In a coal-fired power generation system, energy efficiency is increasingly focused on due to the fact that the key indices of power plant such as coal cost and emission are closely related to energy efficiency. However, many coal-fired power plants lack effective energy efficiency program due to: diversified unit equipment type, insufficient or outdated original parameter setting, or diversified operation...
Start-up, loading, and shut-down procedure of induction generator is different from synchronous generator. At the initial time of grid connection, induction generator's voltage is zero. Therefore, it is assumed here that synchronization procedure as normally occurred with a synchronous generator is not required. However, it is well known that in order to operate properly, an induction generator needs...
Conventional/Existing power flow methods are designed using assumptions like slack bus, PV and PQ bus, low R/X ratio in the formulation, which does not hold good when applied to low voltage systems like microgrids (MGs), with small sources. Newton based methods exhibit poor operational performance when applied on distribution systems characterized by low voltage, radial nature and high R/X ratio....
The owners of PV systems and EV charging station are probably different. Combining PV systems with EV charging station can contribute to more benefit, according to previous research, but also lead to some problem. In order to solve the problem of energy management and profit distribution, a multi-party energy management for EV charging station cooperated with PV systems in smart grid is proposed....
Distributed photovoltaic (PV) power plant monitoring is one of the crucial aspects for energy forecasting and demand management in the future smart grid (SG) through establishing low-powered communication technology. In this paper, Zigbee wireless technology is considered for AC electrical parameters' monitoring of the distributed PV plant located at Universiti Putra Malaysia (UPM). For this consideration,...
Fault ride through (FRT) capability is one of the challenges faced in the medium to high voltage large-scale grid-tied photovoltaic power plants (PVPPs). Besides that, due to the high penetration of installed distributed generation (DG) units, the grid voltage enhancement under unbalanced faults is a requirement of several standards and grid codes. The controller of the grid-connected inverter consists...
The penetration of distributed energy resources in distribution networks leads to the decentralisation of the power generation. This is contrary to the traditional centralized power generation where the power is fed from transmission systems. To cope with the impact of the decentralised power generation, clustering power systems approach (CPSA) is proposed. It is an approach that coexists operations...
This paper proposes an optimal dispatch strategy of hybrid power generation with battery energy storage system (BESS) for an islanding operation of Mae Hong Son (MHS). MHS is located in the far west mountain valley and there is plenty of renewable resources. Fault often occurs on the transmission line which supplies power to MHS. Therefore, it is a challenge to manage MHS as microgrids. The power...
In this paper, we present a case study of the economic prospects of having renewable integration with storage in the district of Temburong in Brunei. Temburong has a microgrid consisting of diesel generators (DGs) with a peak demand in excess of 6 MW. It is forecasted that the peak load will be more than 10 MW by 2020. The inherent advantages of renewable energy motivates us to study the use of available...
The Virtual Power Plant (VPP) is eyed as a solution to the complexities and drawbacks caused by the accelerating penetration of DGs. To actualize the concept of the VPP coordinating the smaller and diverse energy resources, sophisticated planning and scheduling is required. With a large amount of information to take into account, the possible number of solutions and the complex strategies for the...
A large amount of renewable generation reduces the electric load on conventional power systems especially on a clear day. It results in a decrease in the number of operating thermal power plants. One of the key technologies for ensuring the supply-demand balancing capabilities is the Home Energy Management System (HEMS). In several previous studies, the effects of an HEMS for one house have been evaluated...
The proposed improved bees algorithm (IBA) finds a trustworthy solution to the dynamic economic dispatch (DED) problem considering the prohibited operating zones. Additional techniques such as constraint handling, adaptive patch size, and limited search space are integrated with general bees algorithm, making significant improvement in the overall performance of the proposed technique. The DED problem...
Smart grid is a brand new power system that allows the installation of a high percentage of powers from renewable energy sources. In its operation, how to utilize the smoothing effect of renewable energy output plays a vital role in ensuring the power quality. This paper proposes a new operation method for smart grid which assures both the power quality and the economy of the operation. Firstly, we...
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