Operation control, energy management, and power quality enhancement for a cluster of isolated microgrids

Elmetwaly, Ahmed Hussain; ElDesouky, Azza A.; Omar, Ahmed I.; Saad, Mohammed Attya

doi:10.1016/j.asej.2022.101737

Cited by 43 publications

(13 citation statements)

References 38 publications

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“…Key technical points: Most of the existing photovoltaic inverter frequency measurement accuracy and frequency sampling period cannot meet the fast frequency response requirements [19]. It is necessary to optimize or install a special high‐precision frequency measurement module according to the actual situation of the photovoltaic inverter.…”

Section: Fast Frequency Response Technology Of Photovoltaic Power Sta...mentioning

confidence: 99%

“…Each power generation unit actively participates in the frequency response, so that the entire new energy power station has a fast frequency response function to the outside world. Key technical points: Most of the existing photovoltaic inverter frequency measurement accuracy and frequency sampling period cannot meet the fast frequency response requirements [19]. It is necessary to optimize or install a special high‐precision frequency measurement module according to the actual situation of the photovoltaic inverter.…”

Section: Fast Frequency Response Technology Of Photovoltaic Power Sta...mentioning

confidence: 99%

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Fast frequency response technology of photovoltaic power plant based on equivalent modelling

Yin

2023

The Journal of Engineering

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With the centralized access of large capacity and high proportion of new energy to the power grid, the power structure has undergone great changes, and the fast frequency response resources available to the power grid have gradually decreased. If high-power DC blocking occurs, it will pose a serious threat to the frequency security of the power grid, and the frequency regulation pressure of the power grid and the risk of safe operation will continue to increase. To this end, a fast frequency response technology for photovoltaic power plants based on equivalent modelling is proposed. According to the principle of equivalent modelling, the equivalent model of a single unit of photovoltaic power station is established through the parameters of photovoltaic array, photovoltaic inverter, unit transformer, unit transformer and collector line. According to the fast frequency response performance requirements of photovoltaic power plants, combined with the characteristics of photovoltaic power plants, a feasible scheme for fast frequency response of photovoltaic power plants is introduced. The case study on the implementation of fast frequency response project in photovoltaic power station shows that according to the order and type of AGC command and fast frequency response command, photovoltaic power station has conducted command superposition tests under 50 ±0.2 Hz and 50 ±0.09 Hz disturbance amplitudes respectively, and the results are qualified. The integration of automatic generation control/automatic voltage control (AGC/AVC) and fast frequency response function of photovoltaic power station is realized by using relevant technologies, so that the photovoltaic power station can actively support the grid frequency and voltage.

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Section: Fast Frequency Response Technology Of Photovoltaic Power Sta...mentioning

confidence: 99%

Section: Fast Frequency Response Technology Of Photovoltaic Power Sta...mentioning

confidence: 99%

Fast frequency response technology of photovoltaic power plant based on equivalent modelling

Yin

2023

The Journal of Engineering

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“…The controller scheme is presented. The gate pulses are generated as an output of the DVR voltages to drive the VSI, which absorbs increasing voltage and compensates for decreasing voltage which absorbs increasing voltage and compensates for decreasing voltage [27]. The proposed DVR can be controlled in five steps, as shown below [26].…”

Section: The Proposed Control Scheme For Dvrmentioning

confidence: 99%

Power Quality Improvement Considering Voltage Sag and Unbalance Using DVR

Matter

Mahmoud

Elsayed

2023

Journal of Al-Azhar University Engineering Sector

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According to recent power quality (PQ) studies, voltage sags and voltage unbalance in medium voltage and low voltage distribution grids are the most common type of power quality problems. This paper presents a solution to two different types of power quality issues; voltage sag and voltage unbalance. In order to study the actual impact of these two PQ issues, a study case based on real nonlinear loads data consists of large induction motors, located at Beshai Company in Sadat city, are investigate, the dynamic voltage restorer (DVR) is proposed to eliminate the voltage unbalance and the voltage sag problems. The dynamic voltage restorer is linked to the PCC to improve the PQ issues that have been identified. Matlab Simulink platform is used to simulate the power network, loads, and the dynamic voltage restorer (DVR). The jellyfish search optimizer (JFS) is utilized to get the gain values of the PI controller for the proposed DVR. The results of Matlab/Simulink advocate the proposed device's effectiveness, robustness, and latency.

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“…The energy management architecture model using a complete supervisory control and data acquisition system in a educational building was presented in [16]. An energy management system applied to isolated micro grids was proposed in [17], wherein they apply a PID controller which contains coordinate transformations from(a, b, c) to (d, q). When considering a renewable power system and its control, full modeling can be challenging because the system will have different energy domains.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Simulation in Multibond Graphs Applied to Three-Phase Electrical Systems

et al. 2023

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The modeling of three-phase electrical systems in the coordinates d,q,0 in a simple and direct way in a multibond graph approach is presented. From the graphical model obtained, a mathematical model in state space can be determined. Thus, studies of the electromagnetic transients of electrical systems can be analyzed. Likewise, this modeling in the physical domain can be applied to balanced or unbalanced systems and the storage elements (inductances and capacitances) can be connected to be linearly independent or dependent. Structural properties such as stability, controllability, observability or controller design can be analyzed in multibond graphs. The proposed methodology is applied to two examples and the simulation results are shown using 20-Sim software.

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Operation control, energy management, and power quality enhancement for a cluster of isolated microgrids

Cited by 43 publications

References 38 publications

Fast frequency response technology of photovoltaic power plant based on equivalent modelling

Fast frequency response technology of photovoltaic power plant based on equivalent modelling

Power Quality Improvement Considering Voltage Sag and Unbalance Using DVR

Modeling and Simulation in Multibond Graphs Applied to Three-Phase Electrical Systems

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