Innovative energy management system for low-voltage networks with distributed generation based on prosumers’ active participation

Wasiak, I.; Szypowski, Michał; Kelm, Paweł; Mieński, R.; Wędzik, Andrzej; Pawełek, R.; Malaczek, Michal; Urbanek, Przemysław

doi:10.1016/j.apenergy.2022.118705

Cited by 14 publications

(5 citation statements)

References 18 publications

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“…The MVDs in active LVDGs can be leveraged for an effective and unconventional voltage management. In recent works, the MVD impact in LVDGs has been ignored or not explicitly exploited by either assuming a balanced operation [6], conducting voltage regulation in each phase individually [13] or by considering only three-phase inverters as the controllable assets [7]. In a different direction, an optimization problem for controlling the reactive power of the single-phase PV systems in a centralized manner is presented in ( 4)-( 8).…”

Section: B Reactive Power Compensation With Cross-phase Voltage Respo...mentioning

confidence: 99%

Voltage Regulation Under Unbalanced Power Flow in Active Four-Wire Low Voltage Distribution Grids

Kotsonias

Asprou

Hadjidemetriou

et al. 2022

2022 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe)

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The increasing penetration of distributed energy resources in Low Voltage Distribution Grids (LVDGs) has a severe impact on the grid's voltage profile. In active LVDGs the controllable assets are mainly single-phase inverters which most often they are unevenly distributed amongst the supply phases. The majority of voltage support schemes in the literature assume that the phases are decoupled and utilize the singlephase inverters in per-phase regulation methods. However, the particularities of LVDGs, namely the inductive coupling from the distribution lines and the neutral coupling from the fourth wire, can result to a strong phase coupling. Consequently, conventional voltage support schemes by single-phase inverters in active LVDGs can cause unbalanced power deviations in one phase and due to the phase coupling it can have a significant impact on the voltage of a different phase. In this paper, the phase coupling, its impact on voltage regulation, and the factors that contribute to its intensity are analysed. In addition, it is demonstrated how two traditional voltage regulation schemes become ineffective due to the phase coupling. Finally, a reactive power compensation scheme is presented that exploits the mutual voltage deviations induced by the phase couplings in order to improve the voltage regulation capabilities in LVDGs.

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Section: B Reactive Power Compensation With Cross-phase Voltage Respo...mentioning

confidence: 99%

Voltage Regulation Under Unbalanced Power Flow in Active Four-Wire Low Voltage Distribution Grids

Kotsonias

Asprou

Hadjidemetriou

et al. 2022

2022 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe)

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“…However, if the storage system belongs to a prosumer, it is primarily applied for local energy management aimed at the maximization of renewable energy self-consumption and reduction of energy costs. Using it for voltage regulation purposes interferes with this task and may be done as an ancillary service provided by the prosumer to the DSO, which requires a special service agreement between the parties [22]. In such a case, the aspect of additional battery wearing should be considered [20].…”

Section: Introductionmentioning

confidence: 99%

Modular PV System for Applications in Prosumer Installations with Uncontrolled, Unbalanced and Non-Linear Loads

Kelm,

Mieński,

Wasiak

2024

Energies

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This article proposes a modular system for prosumer installations composed of photovoltaic (PV) panels and energy storage (ES) integrated with the low voltage (LV) network through a common 4-wire AC/DC inverter. The novel idea is a control strategy for the inverter in which additional functionalities are incorporated. Apart from transmitting an active power generated by the PV source, the same inverter is used to manage energy generated by the PV and to compensate for the current unbalance, harmonics (including subharmonics and interharmonics) and reactive power of the prosumer loads. As a result of the algorithm operation, the currents flowing to the prosumer installation are sinusoidal, symmetrical and purely active, which results in voltage balancing and improving voltage waveforms at the point of common coupling (PCC). In this way, with the widespread use of this solution among prosumers, the impact of the prosumer installation on the distribution network is minimized, and power quality (PQ) disturbances such as unacceptable voltage rises, voltage unbalance and harmonics are avoided. The presented approach may be a solution to the problems network operators face nowadays due to the uncontrolled connection of PV sources. The proposed modular system is also beneficial for the prosumer as the instances of unacceptable overvoltage and, consequently, shutdowns of prosumer installations are reduced. The features of the proposed method are shown in relation to other means applied for PQ improvement in the networks with distributed generation. A principle of the control and the involving algorithm for the inverter is presented. The efficiency of the control strategy was tested in a simulation developed in the PSCAD/EMTDC program. The results of simulations are presented, and the proposed solution is concluded.

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“…However, it is known that wind and solar power plants are unstable and their generation depends on weather conditions. As a result, researchers have been trying, for several years, to combine generation sources characterized Energies 2023, 16, 4575 2 of 24 by different generation technologies, thus forming hybrid systems [12]. In general, such sources can therefore be classified as distributed generation resources, i.e., generating units, with electricity storage with a capacity not exceeding several MW [12].…”

Section: Introductionmentioning

confidence: 99%

“…The next step in the development of modern power grids is the setting up of microgrids, i.e., area-small power systems based on distributed generation resources. Their purpose is not only to optimize the technical or economic operation of the facilities [13][14][15], but a major focus has also been placed on improving energy security by making the facility self-sufficient and achieving a certain degree of autonomy from the power supply from the power grid [16,17]. This is achieved through the use of stable energy sources, such as combined heat and power (CHP) gas turbines or electric energy storage, usually in battery-based form (BESS) [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Investing in Distributed Generation Technologies at Polish University Campuses during the Energy Transition Era

Zagrajek,

Kłos,

Rasolomampionona

et al. 2023

Energies

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The functioning of universities during the energy transition can be quite a challenge for them. On one hand, it is necessary to pursue a sensible policy of sustainable development based on the growth of their own renewable energy sources and electricity storage facilities. The aim of such measures is to increase self-consumption and ensure partial energy self-reliance while reducing carbon dioxide emissions into the atmosphere. On the other hand, the current geopolitical situation has indicated significant problems in the energy sectors of European Union countries. From the point of view of decision-makers at universities, the main concern should be ensuring the continuity of the operation of such a facility, including ensuring the energy security of the sites under management. Thus, it is necessary to merge these two areas and consider the development of an energy management strategy on university campuses oriented towards the development of distributed generation resources. For this purpose, one of the methods of multi-criteria decision aiding the ELECTRE I was used. As a result of the analyses, an energy management strategy was established for the main campus of the Warsaw University of Technology, which simultaneously ensures energy security and sustainability efforts.

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Innovative energy management system for low-voltage networks with distributed generation based on prosumers’ active participation

Cited by 14 publications

References 18 publications

Voltage Regulation Under Unbalanced Power Flow in Active Four-Wire Low Voltage Distribution Grids

Voltage Regulation Under Unbalanced Power Flow in Active Four-Wire Low Voltage Distribution Grids

Modular PV System for Applications in Prosumer Installations with Uncontrolled, Unbalanced and Non-Linear Loads

Investing in Distributed Generation Technologies at Polish University Campuses during the Energy Transition Era

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