Centralized Control of Distribution Networks with High Penetration of Renewable Energies

Zarco-Soto, Fco. Javier; Zarco-Periñán, Pedro J.; Martínez-Ramos, José L.

doi:10.3390/en14144283

Cited by 14 publications

(11 citation statements)

References 56 publications

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“…The curves to predict maximum and minimum customers' voltages ( V pent max , V pent min ) at a LV busbar voltage (V busbar ) are mathematically given in Equations ( 11) and ( 12), respectively. (12) where (p TR , q TR ) are the active and reactive power measurements at the distribution transformer.…”

Section: Voltage Estimation Models "Curve-fitting Approach"mentioning

confidence: 99%

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Using OLTC-Fitted Distribution Transformer to Increase Residential PV Hosting Capacity: Decentralized Voltage Management Approach

2022

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The increasing Photovoltaic (PV) penetration in residential Low Voltage (LV) networks is likely to result in a voltage rise problem. One of the potential solutions to deal with this problem is to adopt a distribution transformer fitted with an On-Load Tap Changer (OLTC). The control of the OLTC in response to local measurements reduces the need for expensive communication channels and remote measuring devices. However, this requires developing an advanced decision-making algorithm to estimate the existence of voltage issues and define the best set point of the OLTC. This paper presents a decentralized data-driven control approach to operate the OLTC using local measurements at a distribution transformer (i.e., active power and voltage at the secondary side of the transformer). To do so, Monte Carlo simulations are utilized offline to produce a comprehensive dataset of power flows throughout the distribution transformer and customers’ voltages for different PV penetrations. By the application of the curve-fitting technique to the resulting dataset, models to estimate the maximum and the minimum customers’ voltages are defined and embedded into the control logic to manage the OLTC in real time. The application of the approach to a real UK LV feeder shows its effectiveness in improving PV hosting capacity without the need for remote monitoring elements.

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Section: Voltage Estimation Models "Curve-fitting Approach"mentioning

confidence: 99%

“…Alternative DNO-based control solutions are needed to accelerate the uptake of residential PV systems [10][11][12]. One of the potential solutions is to reduce voltages at the LV busbar of distribution transformers to allow additional headroom of voltage rise at customers' connection points [13].…”

Section: Introduction 1backgroundmentioning

confidence: 99%

Using OLTC-Fitted Distribution Transformer to Increase Residential PV Hosting Capacity: Decentralized Voltage Management Approach

2022

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“…However, with the advent of increasing distributed generation integration in the grid which is intermittent in nature and demand of power requirement for electric vehicles in the distribution grid is increasing, the distribution grid is facing a lot of challenges. To effectively manage the distribution grid, centralized control techniques are analyzed to mitigate the challenges of the distribution grid [20]. In distribution grids, a two tier real-time voltage control technique is proposed for voltage control.…”

Section: ░ 2 Literature Reviewmentioning

confidence: 99%

Centralized Reactive Power Controller for Grid Stability and Voltage Control

Baishya

Bhuyan

Das

2022

IJEER

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The integration of renewable energy sources like solar and wind energy into the transmission and distribution grid has increased gradually for quenching the increasing demand for alternative sources to fossil fuels. However, due to the intermittent nature of the renewable sources primarily solar and wind, the injection of the renewable power generation into the grid shall also be fluctuating which in turn will impact the voltage profile of the transmission and distribution grid. Also, in case of any major load disconnection or generator tripping in a weak grid, the voltage profile will be severely impacted in a weak grid. The aim is to control the sudden major voltage profile disturbance of a weak grid in case of variation of power injected into the weak grid from solar and wind energy and also due to sudden load tripping or generator tripping in the weak grid by controlling the reactive power in the weak grid. In this paper, a centralized reactive power controller has been proposed to control reactive power injection or absorption in the grid. By controlling the reactive power sources and sinks centrally via the centralized controller, any contingency can be met to prevent major disturbance of the voltage profile in the weak grid. This controller shall aim to control the connected reactive power sources & sinks based on the voltage profile of the transmission grid and it shall also engage the Line Commutated Converter (LCC) High Voltage Direct Current (HVDC) Reactive Power Controller. Various cases have been analyzed in this paper for implementation of the centralized reactive power controller for voltage control in the transmission grid.

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“…The excess of electric energy mainly causes a local voltage increase in the network above the normative values U n ± 10% [5,6]. The voltage increase is caused by the positive voltage drop on the impedance of the distribution network caused by the current flow from RES [5][6][7]. The problem of increased voltage in the low voltage network can be solved by rebuilding the network using larger diameters of cables with lower impedance (lower voltage drops, but at the cost of large financial outlays) [3].…”

Section: Introductionmentioning

confidence: 99%

Elastic Energy Management Algorithm Using IoT Technology for Devices with Smart Appliance Functionality for Applications in Smart-Grid

2021

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Currently, ensuring the correct functioning of the electrical grid is an important issue in terms of maintaining the normative voltage parameters and local line overloads. The unpredictability of Renewable Energy Sources (RES), the occurrence of the phenomenon of peak demand, as well as exceeding the voltage level above the nominal values in a smart grid makes it justifiable to conduct further research in this field. The article presents the results of simulation tests and experimental laboratory tests of an electricity management system in order to reduce excessively high grid load or reduce excessively high grid voltage values resulting from increased production of prosumer RES. The research is based on the Elastic Energy Management (EEM) algorithm for smart appliances (SA) using IoT (Internet of Things) technology. The data for the algorithm was obtained from a message broker that implements the Message Queue Telemetry Transport (MQTT) protocol. The complexity of selecting power settings for SA in the EEM algorithm required the use of a solution that is applied to the NP difficult problem class. For this purpose, the Greedy Randomized Adaptive Search Procedure (GRASP) was used in the EEM algorithm. The presented results of the simulation and experiment confirmed the possibility of regulating the network voltage by the Elastic Energy Management algorithm in the event of voltage fluctuations related to excessive load or local generation.

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Centralized Control of Distribution Networks with High Penetration of Renewable Energies

Cited by 14 publications

References 56 publications

Using OLTC-Fitted Distribution Transformer to Increase Residential PV Hosting Capacity: Decentralized Voltage Management Approach

Using OLTC-Fitted Distribution Transformer to Increase Residential PV Hosting Capacity: Decentralized Voltage Management Approach

Centralized Reactive Power Controller for Grid Stability and Voltage Control

Elastic Energy Management Algorithm Using IoT Technology for Devices with Smart Appliance Functionality for Applications in Smart-Grid

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