An intelligent load shedding mechanism for maintaining frequency stability

Tofis, Yiannis; Hadjidemetriou, Lenos; Kyriakides, Elias

doi:10.1109/ptc.2013.6652296

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…Due to the constancy of the grid, the voltage and frequency at the PCC will not modify [27,28,41]. In the occurrence of an islanding taking place, the utility grid is detached and the local load is associated to the inverter output.…”

Section: Frequency Bias or Active Frequency Drift (Afd) Methodsmentioning

confidence: 99%

An Analytical Survey of the Islanding Detection Techniques of Distributed Generation Systems

Khichar

Lalwani

2018

Technol Econ Smart Grids Sustain Energy

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This paper provides an analytical survey of the islanding detection techniques for the distributed generation systems. Islanding phenomena on takes place when the power supply from the main utility is intermittent due to numerous reasons, but the distributed generation keeps supplying power into the distribution networks. Islanding can be dangerous to workers and electrical equipment, even the power grid. Therefore, islanding detection is the priority among priorities. Islanding detection is a precondition of two working modes switching for distributed generation. In this paper, a detailed description followed by the classification of the islanding detection techniques has been made based on features, such as detection time, size of non-detection zone, power quality disturbances, system cost and operation under multiple distributed generation units. The merits and demerits of islanding detection methods are analyzed and summarized in this paper. In this manner, the greatest detection outcome can be achieved by exploiting the merits of each method. This paper is aimed to serve as a convenient reference and guidance value for deciding the islanding detection method for future islanding users in distributed generation system.

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Section: Frequency Bias or Active Frequency Drift (Afd) Methodsmentioning

confidence: 99%

An Analytical Survey of the Islanding Detection Techniques of Distributed Generation Systems

Khichar

Lalwani

2018

Technol Econ Smart Grids Sustain Energy

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“…FRRs are reserves that relieve frequency containment reserves (FCR) that are fast switching and aim to stabilize the frequency deviation [18]. In another paper [19] an approach for DSM was presented where only the secondary or non-essential loads were shed, i.e. boilers, refrigerators, heating, ventilation, and air conditioning (HVAC).…”

Section: A Services For the Transmission System Operatormentioning

confidence: 99%

Demand Side Management in Small Power Systems – The Estonian Case Study

Drovtar¹,

Rosin²,

Kilter³

2016

ElAEE

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The increasing amount of stochastic power generation connected to power system increases the need for additional ancillary reserves. Most of today's electricity consumers are relatively flexible and easily controllable, providing an already existing supplement for traditional power system ancillary services. The flexibility of loads depends on the number, type and size of consumers. In small power systems utilizing loads for power system services pose different challenges for the system operator than in larger systems. The main challenge lies in developing a business case and incentives for the customers to participate in such services. This paper discusses and analyses the Estonian three most energy intensive economic sectors potential for demand side response from a small power system point of view. Generally, it is determined that demand side flexibility provides incentives not only for the power system operator but also for the customer who is able optimize its processes to gain higher economic and energy efficiency and at the same time provide flexibility for the system operator.

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“…Many authors have dedicated themselves to studying blackouts and methodologies of low frequency load disconnection (UFLS); for example in Carrión, Ayo & González, 2019;Laghari et al, 2012;Liu & Thomas, 2011;Perumal & Ying, 2004;Ten & Crossley, 2008;and Tofis, Hadjidemetriou & Kyriakides, 2013, phenomena related to instability in large islands, effects of generation output, impact of renewable generation and different types of contingencies are studied; that is why in that EPS type the presence of the slightest disturbance significantly affects the behavior of the network in voltage, current and power; affecting the reliability and stability of the system.…”

Section: Introductionmentioning

confidence: 99%

Alternative Under Frecuency Load Disconection Methodology Based on Semi-Adaptative Model

2020

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Stability analysis in electrical power systems is based on the study in dynamic state of the voltage and frequency, since at the moment that there is some contingency it fluctuates drastically due to the primary and secondary controls of the voltage and frequency to the power systems that act on the generators. In order to solve the possible stability problems that may arise in power systems, various techniques have been developed that act on the generating machines for their protection as well as on the loads for the power cut. The present investigation proposes an alternative methodology for load disconnection by low frequency as an option to save the power system from a possible blackout due to instability due to a fall in the frequency, managing to improve the results affected by other improved techniques, the frequency change range, frequency deviation and the effects of demand disconnection. The proposed methodology was tested in the IEEE 14 bus system.

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An intelligent load shedding mechanism for maintaining frequency stability

Cited by 6 publications

References 7 publications

An Analytical Survey of the Islanding Detection Techniques of Distributed Generation Systems

An Analytical Survey of the Islanding Detection Techniques of Distributed Generation Systems

Demand Side Management in Small Power Systems – The Estonian Case Study

Alternative Under Frecuency Load Disconection Methodology Based on Semi-Adaptative Model

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