A new software-in-the-loop strategy for real-time testing of a coordinated Volt/Var Control

Guerrero, Carlos A. V.; Silveira, Paulo M.; Carvalho, Jose M. de; Bonatto, Benedito Donizeti; Oliveira, Denisson Q.; Santos, Marcos Vinicius; Marujo, Diogo; Zambroni, Antônio; Felver, L. A.; Oliveira, João A.S.; Braga, M. F.

doi:10.1109/powerafrica.2016.7556559

Cited by 6 publications

(2 citation statements)

References 5 publications

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“…Firstly, the algorithm is already developed in the target programming language in a form that can be directly implemented on a microprocessor controller. Additionally, a closed-loop environment allows for considering the impact of communication latency, controller computational time, and simulated process dynamics on the regulator's performance [32][33][34]. Therefore, it is a cheap, fast, and reliable way to conduct the early prototyping of the control algorithms.…”

Section: Methods and Experimentsmentioning

confidence: 99%

A Fuzzy OLTC Controller: Applicability in the Transition Stage of the Energy System Transformation

Wróblewski,

Kowalik,

Januszewski

et al. 2024

Energies

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This paper introduces a Fuzzy Logic Controller designed for an on-load tap changer within medium voltage distribution systems with bulk penetration of Distributed Energy Resources. As the on-load tap changer remains one of the most essential forms of voltage regulation in medium voltage distribution networks, improving its operation is a cost-effective response to the emerging voltage violations caused by intermittent generation during the early stages of the energy system transformation. Software-in-the-loop simulations were conducted to validate the effectiveness of the proposed algorithm compared to the conventional methods. A modified CIGRE Medium Voltage Distribution Network Benchmark in European Configuration was modelled while the controller code developed in Python 3.12 was running on a PC, both coupled in a real-time closed-loop environment. The analyses showed that the proposed algorithm managed to reduce overvoltage from 7.02% to 4.85% in the benchmark network, thus demonstrating that the algorithm is efficient and ready for on-field implementation.

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Section: Methods and Experimentsmentioning

confidence: 99%

A Fuzzy OLTC Controller: Applicability in the Transition Stage of the Energy System Transformation

Wróblewski,

Kowalik,

Januszewski

et al. 2024

Energies

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“…However, the performance of the platforms remains unknown and more importantly, the solution does not include any test automation. Figure 2.22 Example RTDS-MALTAB co-simulator with TCP/IP over RSCAD [124] Nevertheless, while developing and testing a new control algorithm it is crucial not only to provide external control to a simulated grid but also to handle the co-simulation process itself with automated testing of investigated algorithms. This functionality has not been found.…”

Section: Online Co-simulation Platformsmentioning

confidence: 99%

Voltage control in power distribution grids equipped with large-scale renewable energy sources

Krata¹

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High integration of renewable energy sources (RESs) and battery energy storage systems (BESS) into power distribution networks brings new challenges to grid control schemes. The old assumption of unidirectional power flow (from transmission system to loads) is no longer valid when almost every load bus can become temporarily or permanently a generation bus due to increasing power from renewable sources such as photovoltaic (PV) generation. In fact, a power flow direction can alter at any grid location many times a day, impacting existing voltage regulation schemes. In particular, due to the lack of coordination between different voltage control apparatus, a dynamic change in PV generation can cause the grid voltage magnitude to go beyond acceptable limits. Hence, daily power fluctuations, e.g. caused by moving clouds, can lead to over-or under-voltage situations with a regulation time that takes minutes before the voltage is recovered and the grid is ready for a next, unexpected disturbance. This prolonged and inaccurate traditional regulation process affects electrical devices connected to grids with medium-and large-PV generation. Even more importantly, insufficient voltage regulation can prevent new developments of RESs plants because power utility companies might not allow for more RESs generation if a grid voltage is prone to fluctuate.This research is focused on the behaviour of power distribution systems exposed to large-scale PV generation and BESS facilities. Specifically, the study aims to address questions of how those modern power technologies influence voltages and their control in a distribution network as well as how to improve cooperation between traditional and modern grid regulation devices by means of advanced control strategies. To answer the research questions, the study investigates the real-time performance of a distribution grid voltage control in the presence of dynamically changing large-scale RESs and BESS generation and provides a novel real-time coordinated control to address voltage fluctuations caused by uncertain PV generation. Furthermore, the developed voltage control method is based on a model-driven approach with the real-time controller predicting hundreds of possible regulation trajectories and choosing the one that fulfils optimisation criteria the most. In addition, the multidimensional, nonlinear, mixed-integer optimisation is executed based on parallel-computed time-series grid simulations, which reproduce grid behaviour, incorporate mutual interactions of voltage controllers and ii account for PV variability. Uniquely, the algorithm also considers autonomous responses from upstream voltage regulation devices and includes them into the solution.Next, the investigation was conducted on real-time models of a semi-rural grid located in South-East Queensland, Australia, with a large-scale PV plant (3.15MWp of power) and BESS facility as large as 0.6MW/0.76MWh. As a result of implementing the proposed control coordination to the studied grid, voltage fluctuations caused by dyn...

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Real-Time Simulators Applied to Brazilian Power Systems: A Review

Oliveira

García

et al. 2020

J Control Autom Electr Syst

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This paper presents a review on real-time simulators and their use applied to power systems in Brazil. The review comprises most of the current research made in institutions/enterprises that own real-time simulators as well as the application trends of related technologies, considering both conferences and journals published papers. It is observed that several Brazilian universities have simulators in real-time and that the publications in journals have been increased, which shows that the learning curve of the Brazilian research institutions has led to an improvement in the quality of the publications. It is also important to emphasize that the analysis of real systems in most publications indicates a trend and a demand for studies with simulators in real time, to solve problems of companies of the electric sector. Related with works that use real systems in their simulations, several publications were generated in the context of R&D projects. This shows that real-time simulators are very relevant tools for studies on power systems of companies in the electricity sector, aligning scientific research and the provision of highly specialized services.

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A new software-in-the-loop strategy for real-time testing of a coordinated Volt/Var Control

Cited by 6 publications

References 5 publications

A Fuzzy OLTC Controller: Applicability in the Transition Stage of the Energy System Transformation

A Fuzzy OLTC Controller: Applicability in the Transition Stage of the Energy System Transformation

Voltage control in power distribution grids equipped with large-scale renewable energy sources

Real-Time Simulators Applied to Brazilian Power Systems: A Review

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