Comparative Study of the IEEE 34 Node Test Feeder under Practical Simplifications

Mwakabuta, N.; Sekar, A.

doi:10.1109/naps.2007.4402354

Cited by 72 publications

(23 citation statements)

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“…The proposed methodology was tested and validated in the IEEE 37 node test feeder (IEEE 2010). To make it a balanced system, the simplifications stated in (Mwakabuta and Sekar 2007) were implemented. Voltage limits are defined as 0.93 and 1.07.…”

Section: Resultsmentioning

confidence: 99%

Load-Margin Assessments in MicroGrids and the Influence of Power Electronic Converter Operation Mode

Nascimento

Souza

Neto

et al. 2020

J Control Autom Electr Syst

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This paper deals with static voltage stability assessments in the context of microgrids. It is well known that distributed systems have been changing their operation mode from passive to active due to a high level of distributed resource penetration. Hence, operating of the system in islanded mode could be considered on a routine or emergency basis, and the voltage stability analysis become vital in any planning or operation study in the distribution level of electrical power systems. In this way, this paper develops a novel formulation for voltage stability analysis in islanded systems, showing the differences with respect to traditional methodologies, mainly when they neglect the absence of a swing bus and the frequency of the system as a variable. Further, the present work compares the load margins of a distribution system when it works in both modes, in grid-connected mode and islanded mode, considering the operation strategies of the most usual Power Electronic Converters. The results are carried out in the IEEE-37 Node Test Feeder. Keywords Active distribution networks • Islanded operation • Microgrids • Load margin • Voltage stability List of Symbols Pg k , Q g k Active and reactive powers generated at bus k, respectively P speck , Q speck Active and reactive constant powers specified at bus k, respectively Q min k , Q max k Upper and lower reactive power limits at bus k, respectively P max Maximum active power B B. de Nadai Nascimento

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Section: Resultsmentioning

confidence: 99%

Load-Margin Assessments in MicroGrids and the Influence of Power Electronic Converter Operation Mode

Nascimento

Souza

Neto

et al. 2020

J Control Autom Electr Syst

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show abstract

“…5). This system has an unbalanced topology, so some modifications have been made to turn it equivalent to a balanced one [41]. These new systems considerations are listed below:…”

Section: Resultsmentioning

confidence: 99%

Load shedding scheme with under‐frequency and undervoltage corrective actions to supply high priority loads in islanded microgrids

Nascimento

Souza

Costa

et al. 2019

IET Renewable Power Generation

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In the last few years, microgrids have become a potential solution to improve reliability and security in the supply of electricity to power systems. When a microgrid changes its operation mode from grid-connected to islanded, particular attention must be paid by the operation services. In the islanded mode, the microgrids' frequency and voltage may reach undesirable values, harming the security and quality of the operation. This paper aims to propose global and local strategies of load shedding to preserve the energy supply to high priority loads within quality standards. The focus of this paper is to consider a microgrid operating only with primary control. In this sense, a proper microgrid time-continuous load flow is applied, considering the constant verification of the frequency and the voltage of all buses. Finally, a Monte Carlo Simulation is used to validate the proposal presented and to give some indices that quantify the load shed in each period. The results show the superior performance of the proposed strategy compared to a state-of-the-art load shedding solution that does not consider the priority of loads.

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“…2. This test network was modified from the IEEE 34-bus test network [19] with the following simplifications and adjustments [20]:  Approximately one-third of the distributed loads was placed at the end of the line and two-thirds at one-fourth of the way from the source end;  Only the three main phase sections were included; the unbalance phase loads were summed up at the root;  The low-voltage (0.4 kV) network segment was represented by an equivalent load;  Constant PQ loads were represented by dynamic load models. Constant Z loads were represented by passive resistors and inductors.…”

Section: Test System and Resultsmentioning

confidence: 99%

Dynamic state estimation for distribution networks with renewable energy integration

Nguyen¹,

Venayagamoorthy²,

Kling³

et al. 2013

SGCE

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The massive integration of variable and unpredictable Renewable Energy Sources (RES) and new types of load consumptions increases the dynamic and uncertain nature of the electricity grid. Emerging interests have focused on improving the monitoring capabilities of network operators so that they can have accurate insight into a network's status at the right moment and predict its future trends. Though state estimation is crucial for this purpose to trigger control functions, it has been used mainly for steady-state analysis. The need for dynamic state estimation (DSE), however, is increasing for real-time control and operation. This paper addresses the important role of DSE over conventional static-state estimation in this new distribution network context. Computational burden mitigates the state-of-the-art utilizations of DSE in real large-scale networks, although DSE was introduced several decades ago. This paper the unscented Kalman filter (UKF) to alleviate computational burden with DSE. The UKF-based approach does not use a linearization procedure and thus outperforms the conventional Extended Kalman Filter based approach to cope with non-linear models. The performance of the UKF method is investigated with a simulation of an 18-bus distribution network on the real-time digital simulator (RTDS) platform. A distribution network with considerable integration of renewable energy production is used to evaluate the UKF-based DSE approach under different types of events.

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Comparative Study of the IEEE 34 Node Test Feeder under Practical Simplifications

Cited by 72 publications

References 1 publication

Load-Margin Assessments in MicroGrids and the Influence of Power Electronic Converter Operation Mode

Load-Margin Assessments in MicroGrids and the Influence of Power Electronic Converter Operation Mode

Load shedding scheme with under‐frequency and undervoltage corrective actions to supply high priority loads in islanded microgrids

Dynamic state estimation for distribution networks with renewable energy integration

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