Protection of embedded generation connected to a distribution network and loss of mains detection

Guillot, M.; Collombet, C.; Bertrand, Pierre; Gotzig, B.

doi:10.1049/cp:20010837

Cited by 14 publications

(6 citation statements)

References 2 publications

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“…Among the countries that have the longest experience of connecting small power plants to the grid is certainly the UK, whose developed engineering practices serve as a guide to many countries in developing their own rules [36]. According to their recommendations (colloquially known as G59/3) for generation connection to the distribution grid, the recommended protection functions that network operators require are as follows [37]: Recommended LOM function is rate of change of frequency, ROCOF, especially for smaller size plants.…”

Section: Selected Protection Functions and Non-detection Zonesmentioning

confidence: 99%

Probability risk assessment of island operation event for large scale photovoltaic plant

et al. 2019

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Original methodology for the calculation of island operation event occurrence possibility is proposed for the photovoltaic power plants connected to medium voltage grid. Within the methodology description, event fault tree with number of pairs of basic initial events is discussed, where probability for the basic events are defined and flow chart for the proposed calculation is given. The novelty in the approach for probability calculation includes also proposal for development of frequency distribution functions for concerned power generation and consumption variables which have to be modelled for the probability calculations, for which the triangular distributions curves have been chosen. Being boundary conditions for definition of non-detected island event, borders of non-detection zones are defined for the common island detection protection functions: over frequency and under frequency, over voltage and under voltage and rate of change of frequency functions. Comparison of the island event probability is presented on case study example, with conclusion that standard voltage and frequency protection alone are not satisfying, but ROCOF protection could be suitable, subject to particular local grid characteristic and calculative verification of probability.

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Section: Selected Protection Functions and Non-detection Zonesmentioning

confidence: 99%

Probability risk assessment of island operation event for large scale photovoltaic plant

et al. 2019

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“…Loss of Mains, which is also known as islanding, occurs when part of the utility network with at least one distributed generator is separated from the rest of the system [7]. It is not permitted in most countries because of safety hazards and power quality issues.…”

Section: ) Loss Of Mainsmentioning

confidence: 99%

Protection and stability assessment in future distribution networks using PMUs

Ding¹,

Booth²

2012

11th IET International Conference on Developments in Power Systems Protection (DPSP 2012)

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Phasor Measurement Units (PMUs) have the potential to play an essential role in power system monitoring and operation in the future, particularly for power systems incorporating increasing amounts of distributed generation (DG) and possibly systems operating in islanded mode in the future [1]. Their ability to directly measure and provide the voltage and current phasors at the PMU location offers numerous possibilities for ascertaining information relating to the state and health of the power system. Typical applications of PMUs in distribution networks include: state estimation, dynamic stability supervision, instability prediction and control, protection and fault location, and power quality monitoring [2]. This paper presents a brief overview of the applications of PMU-enabled distribution network functions, with a focus on loss of mains (LOM) protection using a model that is representative of a distribution network incorporating DG. The paper reports on extensive simulations that have been carried out in order to develop a PMU-based system that can detect (very quickly) loss-of mains conditions under situations where local (i.e. potentially islanded) load and DG output is very closely balanced. Furthermore, it is demonstrated that the developed PMU-based LOM system can identify and differentiate between load transients, local short circuits and true loss of mains conditions under a variety of different scenarios. Future activities in the project are also presented.

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“…Typical passive techniques include the rate of change of frequency relay (ROCOF) [5][6]; rate of change of output power [7][8]; ratio of the frequency change to the output power change [9]; rate of change of voltage and power factor [10]; detection of islanding using an elliptical trajectory technique [11]; voltage unbalance; and total harmonic distortion (THD) [12], etc. These technologies were developed based on the fact that a loss of the grid will cause variations in system voltage, current, or frequency under almost all circumstances.…”

Section: Introductionmentioning

confidence: 99%

Study and Development of Anti-Islanding Control for Synchronous Machine-Based Distributed Generators: November 2001--March 2004

Ye¹

2006

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Protection of embedded generation connected to a distribution network and loss of mains detection

Cited by 14 publications

References 2 publications

Probability risk assessment of island operation event for large scale photovoltaic plant

Probability risk assessment of island operation event for large scale photovoltaic plant

Protection and stability assessment in future distribution networks using PMUs

Study and Development of Anti-Islanding Control for Synchronous Machine-Based Distributed Generators: November 2001--March 2004

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