Implementation and comparison of different under frequency load-shedding schemes

Delfino, B.; Massucco, S.; Morini, Andrea; Scalera, P.; Silvestro, F.

doi:10.1109/pess.2001.970031

Cited by 150 publications

(97 citation statements)

References 10 publications

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“…Static load shedding schemes are more common in practical power systems due to its simplicity [18,19]. Therefore, this paper uses a static load shedding scheme to study the system behavior in the control mode transition period of the microgrid.…”

Section: Load Sheddingmentioning

confidence: 99%

“…It involves 4 steps to design a static load shedding scheme: 1) calculation of total load to be shed, 2) deciding the number of load shedding stages, 3) determining the size of load to shed at each stage and 4) setting the frequency thresholds and time delays [16]. The load shedding scheme that is developed based on [19] is shown in Fig. 3.…”

Section: Load Sheddingmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Islanding Detection Time Duration on the Stable Operation of a Synchronous Generator Controlled Microgrid

Lidula

Rajapakse

Muthumuni

et al. 2017

Technol Econ Smart Grids Sustain Energy

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This paper presents the impact of the time duration taken to change the control mode of a microgrid from grid connected operation to islanded operation (control mode transition delay) on the stability of a microgrid. A detailed microgrid simulation model was developed and its frequency and voltage control was designed based on the most generic schemes identified after a profound literature survey on practical microgrids. The simulation study results revealed that the control mode transition delay has a significant impact on the amount of load that need to be shed to preserve the stability of the islanded microgrid. The control mode transition delay also has an impact on the power quality.

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Section: Load Sheddingmentioning

confidence: 99%

Section: Load Sheddingmentioning

confidence: 99%

Impact of Islanding Detection Time Duration on the Stable Operation of a Synchronous Generator Controlled Microgrid

Lidula

Rajapakse

Muthumuni

et al. 2017

Technol Econ Smart Grids Sustain Energy

View full text Add to dashboard Cite

show abstract

“…The frequency is a sensitive indicator of energy balance in the system, therefore should be used as an input signal to control the power system. In fact, the electric charge frequency control is one of the basic controls in a power system that automatically occurs in all power plants (Delfino et al, 2001).…”

Section: (Power) Line Frequencymentioning

confidence: 99%

Improvement using frequency relays compared to dynamic and static relays in frequency instability

Rasaei

Emamhosseini

2017

Bangladesh J. Sci. Ind. Res.

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Nowadays a smarter, more diverse and robust electricity infrastructure is necessary because power grids form one of the most effective components of the infrastructure on which modern society depends on. The stability of an electrical grid is very important for suppliers and consumers. Frequency variations cause instability in the electricity grid. There will be so many problems such as overproduction, overloading, and etc. which have irreversible effects on suppliers and consumers. Balancing the isolated systems in terms of production and consumption, and also using the frequency relays in power grids are useful ways to solve these problems. Due to the importance of frequency relays in proportion than dynamic and static relays, designing and optimizing the frequency relays are very important to guarantee the stability of the electrical grid. The frequency relays can be used in a different network with different charges. The frequency relays have two parts, namely measurement, and detection which undertake separate tasks. In this paper, we investigated the function of frequency relays. We also simulated and analyzed the aforementioned issues. The simulation provides a comparison of grid charge variations and nominal frequency in a state of disarray and approach to the ideal state. Some blocks have been used for counting the frequency in this simulation which most notably, included a block of frequency measurement and another block that has the protection duty.

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“…Besides, in each step, the amount of load to be shed for each Load needs to be determined. Division of loads to be shed among load shedding steps and division of loads to be shed in a step have been implemented in various ways [14][15][16][17]. A distributed constraint optimization problem (DCOP) [18] is a fundamental problem that can formalize various applications related to MAS.…”

Section: Multi-agent System For Load Sheddingmentioning

confidence: 99%

Distributed Load-Shedding System for Agent-Based Autonomous Microgrid Operations

2014

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Abstract:A microgrid is an eco-friendly power system because renewable sources are used as main power sources. In the islanded operation mode of a microgrid, maintaining the balance between power supply and power demand is a very important problem. In the case of surplus supply, decreased generation output and/or charge of distributed storages can be applied to solve the imbalance between power supply and demand. In the case of supply shortages, increased generation output and/or discharge of distributed storages can be applied. Especially in the case of critical supply shortages, load shedding should be applied. In a distributed load-shedding approach, microgrid components need to make decisions autonomously. For autonomous microgrid operation, a multi-agent system has been investigated. In this paper, a distributed load-shedding system for agent-based autonomous operation of a microgrid is designed. The designed system is implemented and tested to show the functionality and feasibility of the proposed system.

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Implementation and comparison of different under frequency load-shedding schemes

Cited by 150 publications

References 10 publications

Impact of Islanding Detection Time Duration on the Stable Operation of a Synchronous Generator Controlled Microgrid

Impact of Islanding Detection Time Duration on the Stable Operation of a Synchronous Generator Controlled Microgrid

Improvement using frequency relays compared to dynamic and static relays in frequency instability

Distributed Load-Shedding System for Agent-Based Autonomous Microgrid Operations

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