Voltage harmonic distortion compensation with non-linear load power sharing in low-voltage islanded microgrid

Moussa, Hassan; Martin, Jean‐Philippe; Pierfederici, Serge; Meibody‐Tabar, Farid; Moubayed, Nazih

doi:10.1016/j.matcom.2018.05.007

Cited by 11 publications

(2 citation statements)

References 19 publications

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“…The harmonic current detection method is based on instantaneous reactive power [20], as shown in Figure 3. Three-phase current in the grid are , , , fundamental current are , , , harmonic current are * , * , * , power voltage is .…”

Section: Appl Sci 2020 10 X For Peer Review 6 Of 17mentioning

confidence: 99%

Grid-Friendly Active Demand Strategy on Air Conditioning Class Load

Zhu¹,

Gu²,

Wu³

2020

Applied Sciences

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The growing number of accessed energy-efficient frequency conversion air conditioners is likely to generate a large number of harmonics on the power grid. The following shortage in the reactive power of peak load may trigger voltage collapse. Hence, this conflicts with people’s expectations for a cozy environment. Concerning the problems mentioned above, an active management scheme is put forward to balance the electricity use and the normal operation of air conditioning systems. To be specific, first, schemes to suppress the low voltage ride through (LVRT) and harmonic are designed. Second, to deaden the adverse effects caused by nonlinear group load running on the grid and prevent the unexpected accidents engendered from grid malfunction, the dynamic sensing information obtained by an online monitor is analyzed, which can be seen as an actively supervised mechanism. The combined application of active and passive filtering technology is studied as well. Third, the new energy storage is accessed reliably to cope with peak-cutting or grid breaking emergencies, and the fuzzy control algorithm is researched. Finally, system feasibility is verified by functional modules co-operation simulation, and active management target is achieved under scientific and reasonable state-of-charge (SOC) management strategy.

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Section: Appl Sci 2020 10 X For Peer Review 6 Of 17mentioning

confidence: 99%

Grid-Friendly Active Demand Strategy on Air Conditioning Class Load

Zhu¹,

Gu²,

Wu³

2020

Applied Sciences

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“…Moreover, the coefficients calculated for droop controller have low values and the system stability has been improved as well. In [9,10], a harmonic droop controller scheme has been proposed for decreasing the voltage harmonics of point of common coupling (PCC) and harmonic power sharing among shunt inverters controlled by the classic droop control method. In [11], unbalance and harmonic droop controller schemes have been used for sharing harmonics and unbalance powers among DGs and improving the PCC voltage quality as well.…”

Section: Introductionmentioning

confidence: 99%

Voltage quality and load sharing improvement in islanded microgrids using distributed hierarchical control

Ghanizdeh

Gharehpetian

2019

IET Renewable Power Generation

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In this study, to compensate voltage unbalance and harmonics and improve load sharing, a distributed hierarchical control scheme is proposed for islanded microgrids. In the proposed scheme, a method is proposed, which can improve the voltage quality of sensitive load bus by determining the amount of effort made by each distributed generation (DG) and taking their rated power constraints into account for compensation. Moreover, this method is capable of improving the load sharing among DG units adaptively using circulating currents rule. Compared to the previous proposed methods, the method proposed in this study does not need a central controller, and communication is only needed between adjacent DG units. Furthermore, in this scheme, the contribution of each DG unit in compensation will be in proportion to its rated power, and none of them will be overloaded. Also, to compensate the error of load current sharing components, there is no need to have any information about impedance of DGs feeders and load type. To show the efficiency of the proposed scheme, simulation studies are performed on a typical islanded microgrid in MATLAB/Simulink environment.

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