Cooperation of Voltage Controlled Active Power Filter with Grid-Connected DGs in Microgrid

Munir, Hafiz Mudassir; Zou, Jianxiao; Xie, Changjun; Guerrero, Josep M.

doi:10.3390/su11010154

Cited by 11 publications

(10 citation statements)

References 36 publications

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“…Table 1 shows the system parameters used in the simulation [31]. Table 2 lists the control parameters of the system [35]. It is worth noting that the values of the rated power of DGs are different.…”

Section: Simulation Resultsmentioning

confidence: 99%

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Control of Distributed Generators and Direct Harmonic Voltage Controlled Active Power Filters for Accurate Current Sharing and Power Quality Improvement in Islanded Microgrids

Munir

Ghannam

et al. 2019

Inventions

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Harmonics are regarded as one of the main challenges in a microgrid. This issue may even get worse when different distributed generators (DGs) work together to solve the load sharing problems due to mismatched feeder impedances and diversified DG ratings. Even though load sharing can be achieved, the microgrid suffers from voltage unbalance and total harmonic distortion (THD) issues at the output of DG terminals as well as at the point of common coupling (PCC). Thus, in this paper, the power quality improving method is discussed, with a target of load sharing under the hierarchical control of different DG units and an active power filter (APF) in microgrids. To achieve this objective, we propose integrating a direct harmonic voltage controlled APF with DGs to improve their harmonic compensation performance. This proposed control scheme has many advantages over conventional control using a shunt resistive active power filter (R-APF) with voltage controlled DGs. First, based on the existing THD level of the PCC voltage, the proposed scheme provides improved voltage compensation and reduction in THD in the islanded microgrid. Secondly, equal load sharing can be achieved simultaneously. Thus, the proposed scheme provides better performance and a seamless interface as the proposed study mainly contains both the voltage controlled DGs and the local based voltage detection APF.

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Section: Simulation Resultsmentioning

confidence: 99%

“…Resonant controllers have been employed in this control loop, and the corresponding transfer function has been derived in the s-domain which is shown below [35]:…”

Section: Harmonic Voltage Control Loopmentioning

confidence: 99%

Control of Distributed Generators and Direct Harmonic Voltage Controlled Active Power Filters for Accurate Current Sharing and Power Quality Improvement in Islanded Microgrids

Munir

Ghannam

et al. 2019

Inventions

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“…In a conventional system, one way of energy flow was in practice and consumer act was a passive entity of the power system [17][18][19][20]. While, in microgrid, having some distributed energy resources and storages can operate in grid-connected and islanded mode [21,22]. In microgrid, prosumer which is a consumer can participate in the electricity market through the selling of surplus energy to the national grid or nearby customers [23].…”

Section: Introductionmentioning

confidence: 99%

Optimal Operation of the Campus Microgrid considering the Resource Uncertainty and Demand Response Schemes

Muqeet

Munir

Ahmad

et al. 2021

Mathematical Problems in Engineering

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Present power systems face problems such as rising energy charges and greenhouse gas (GHG) releases. These problems may be assuaged by participating distributed generators (DGs) and demand response (DR) policies in the distribution system (DS). The main focus of this paper is to propose an energy management system (EMS) approach for campus microgrid (µG). For this purpose, a Pakistani university has been investigated and an optimal solution has been proposed. Conventionally, it contains electricity from the national grid only as a supply to fulfil the energy demand. Under the proposed setup, it contains campus owned nondispatchable DGs such as solar photovoltaic (PV) panels and microturbines (MTs) as dispatchable sources. To overcome the random nature of solar irradiance, station battery has been integrated as energy storage. The subsequent nonlinear mathematical problem has been scheduled by mixed-integer nonlinear programming (MINLP) in MATLAB for saving energy cost and battery aging cost. The framework has been validated under deterministic and stochastic environments. Among random parameters, solar irradiance and load have been taken into consideration. Case studies have been carried out considering the demand response strategies to analyze the proposed model. The obtained results show that optimal management and scheduling of storage in the presence of DGs mutually benefit by minimizing consumption cost (customer) and grid load (utility) which show the efficacy of the proposed model. The results obtained are compared to the existing literature and a significant cost reduction is found.

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“…Since the AC source should not generate the pulsating current due to the safety and lifetime procedures, the sinusoidal current waveform is just allowed to be injected to the grid according to power quality standards. Therefore, the non-linearity components of the required current are supplied by the AFP [15][16][17][18]. In order to decrease the output voltage ripples using only passive filters, the switching frequency is increased, which results in incremental switching losses a reduction in the system's efficiency.…”

Section: Introductionmentioning

confidence: 99%

A Novel Control Strategy to Active Power Filter with Load Voltage Support Considering Current Harmonic Compensation

Jafrodi¹,

Ghanbari

Mahmoudian

et al. 2020

Applied Sciences

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This paper outlines some modifications to conventional active power filters (APFs) to compensate for the non-linearity of the load current. Since the APFs inject the required non-linearity of the load harmonic current to make the current source sinusoidal, a combination of passive power filters (PPFs) and APFs in series connection are more effective rather than individual usages. The proposed control approach based on sliding mode control (SMC) with a suitable sliding surface selection being applied to the proposed hybrid APF to increase the flexibility and reduce the complexity of the controller. An outstanding tracking process based on the reference current in the rotating dq frame is tested and guarantees the rapid convergence exponentially. An extra control loop is provided for DC link voltage regulation to minimize the DC ripples and control the APF three-phase output voltage levels. The presented solution provides an effective and straightforward load voltage support, maintaining an excellent dynamic performance in load changing and current compensation. The experimental results represent the authenticity of the proposed hybrid APF performance through several different tests, implying a feasible control approach for active filtering systems.

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Cooperation of Voltage Controlled Active Power Filter with Grid-Connected DGs in Microgrid

Cited by 11 publications

References 36 publications

Control of Distributed Generators and Direct Harmonic Voltage Controlled Active Power Filters for Accurate Current Sharing and Power Quality Improvement in Islanded Microgrids

Control of Distributed Generators and Direct Harmonic Voltage Controlled Active Power Filters for Accurate Current Sharing and Power Quality Improvement in Islanded Microgrids

Optimal Operation of the Campus Microgrid considering the Resource Uncertainty and Demand Response Schemes

A Novel Control Strategy to Active Power Filter with Load Voltage Support Considering Current Harmonic Compensation

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