Operation of a grid connected microgrid with a variable load bus and a diesel generator set

Lakshitha, M.K.G.; Jayawardhana, Kemantha; Boralessa, M. A. Kalhan S.; Rohitha, W.G.R.W.; Hemapala, K.T.M.U.; Lucas, J. R.; Silva, Narendra De; Porawagamage, G.D.

doi:10.1109/ipact.2017.8245216

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…One important advantage of VSDG when connected to the central grid is the capacity to synchronize DG speed to prevent alternator damage [87]. In conclusion, the most important role played by grid-connected GDs is to maintain grid parameters within acceptable limits during unpredictable faults [88,89].…”

Section: Rate Of Adaptation In the Power Systemmentioning

confidence: 99%

Variable Speed Diesel Generators: Performance and Characteristic Comparison

2022

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Diesel generators (DGs) are set to work as a backup during power outages or support the load in remote areas not connected to the national grid. These DGs are working at a constant speed to produce reliable AC power, while electrical energy demand fluctuates according to instantaneous needs. High electric loads occur only for a few hours a day in remote areas, resulting in oversizing DGs. During a low load operation, DGs face poor fuel efficiency and condensation of fuel residues on the walls of engine cylinders that increase friction and premature wear. One solution to increase combustion efficiency at low electric loads is to reduce diesel engine (DE) speed to its ideal regime according to the mechanical torque required by the electrical generator. Therefore, Variable Speed Diesel Generators (VSDGs) allow the operation of the diesel engine at an optimal speed according to the electrical load but require additional electrical equipment and control to maintain the power output to electrical standards. Variable speed technology has shown a significant reduction of up to 40% fuel consumption, resulting in low GHG emissions and operating costs compared to a conventional diesel generator. This technology also eliminates engine idle time during a low load regime to have a longer engine lifetime. The main objective of this survey paper is to present the state of the art of the VSDG technologies and compare their performance in terms of fuel savings, increased engine lifetime, and reduced greenhouse gases (GHG) emissions. Various concepts and the latest VSDG technologies have been evaluated in this paper based on their performance appraisal and degree of innovation.

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Section: Rate Of Adaptation In the Power Systemmentioning

confidence: 99%

Variable Speed Diesel Generators: Performance and Characteristic Comparison

2022

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“…The formula of the governor control is written as [14, 24–27]

\begin{matrix} 1em4pt \\ G_{G} false(t false) = \frac{k_{a} false(k_{p s} s + k_{i s} false)}{s false(1 + T_{d} s false) false(1 + T_{1} s false) false(1 + T_{2} s false)} \end{matrix}

where

k_{p s}

k_{i s}

T_{1} false(T_{2} false)

k_{a}

, and

T_{d}

are the proportional control parameter, integral control parameter, time constants of the actuator, gain value, and time constant, respectively.…”

Section: Structure Of Microgridmentioning

confidence: 99%

Virtual synchronous generator control strategy incorporating improved governor control and coupling compensation for AC microgrid

Peng

Wang

Wen

et al. 2019

IET Power Electronics

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Virtual synchronous generator (VSG) control strategy has been widely used in the AC microgrid in recent years. However, the VSG control strategy is lack of the decoupling ability, and its governor control is also lack of the inertia block and speed controller block, resulting in poor dynamic performance, steady-state performance, and low accuracy of the power sharing of the AC microgrid. In this study, a novel VSG control strategy incorporating improved governor control and coupling compensation is proposed to improve the performance of the AC microgrid. Its improved governor control comprises the speed controller and inertia, which can enhance the inertia of the angular frequency and decrease the difference of the governor control between the novel VSG control strategy and diesel generator. Its coupling compensation comprises the angular frequency deviation compensation and voltage deviation compensation, which can reduce the influence of the uncontrollable coupling on the power regulation and increase the degree of freedom of the power regulation. Experimental results validate the effectiveness of the proposed VSG control strategy.

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Decentralised Control Strategy for Voltage Unbalanced Mitigation in Stand-Alone Microgrid

Bera

Kumar

2021

2021 International Conference on Intelligent Technologies (CONIT)

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Operation of a grid connected microgrid with a variable load bus and a diesel generator set

Cited by 3 publications

References 11 publications

Variable Speed Diesel Generators: Performance and Characteristic Comparison

Variable Speed Diesel Generators: Performance and Characteristic Comparison

Virtual synchronous generator control strategy incorporating improved governor control and coupling compensation for AC microgrid

Decentralised Control Strategy for Voltage Unbalanced Mitigation in Stand-Alone Microgrid

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