Provision of ancillary services in future low-carbon UK electricity system

Teng, Fei; Aunedi, Marko; Štrbac, Goran; Trovato, Vincenzo; Dallagi, Anes

doi:10.1109/isgteurope.2017.8260165

Cited by 13 publications

(9 citation statements)

References 7 publications

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“…For frequency to stabilise eventually after the fault, the amount of FR available must be at least equal to the power outage. In other words, the steady-state constraint is obtained by setting RoCoF to zero in (1) and considering that every FR service has been fully delivered:…”

Section: A Deducing Frequency-security Constraintsmentioning

confidence: 99%

“…The time within t ∈ [T n−1 , T n ) at which nadir is exactly reached is given by setting RoCoF to zero in (1) for that given time interval:…”

Section: A Deducing Frequency-security Constraintsmentioning

confidence: 99%

“…Furthermore, most renewable sources, including wind and photovoltaic, do not contribute to system inertia due to being decoupled from the grid by power electronic converters. While system inertia and Frequency Response (FR) were services widely available in grids dominated by thermal generation as by-products of energy production, the increasing scarcity of these services in low-carbon system increments the costs associated to their provision [1]. These frequency services are necessary to contain the frequency drop after a power outage, in order to avoid the tripping of RoCoF relays and/or the activation of Under-Frequency Load Shedding.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimal Portfolio of Distinct Frequency-Response Services in Low-Inertia Systems

Badesa,

Teng,

Strbac

2019

Preprint

Self Cite

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Section: A Deducing Frequency-security Constraintsmentioning

confidence: 99%

“…The time within t ∈ [T n−1 , T n ) at which nadir is exactly reached is given by setting RoCoF to zero in (1) for that given time interval:…”

Section: A Deducing Frequency-security Constraintsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optimal Portfolio of Distinct Frequency-Response Services in Low-Inertia Systems

Badesa,

Teng,

Strbac

2019

Preprint

Self Cite

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“…These services are normally provided by conventional generation units. Wind and solar generally do not participate in these services, but they will have to be included in these services in the future when their share becomes significant [14]. RES are spatially scattered and could be able to provide local services, either through local markets or through long-term contracts.…”

Section: Introduction 1motivation and Backgroundmentioning

confidence: 99%

Challenges of High Renewable Energy Sources Integration in Power Systems—The Case of Croatia

et al. 2021

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This paper presents a high-level overview of the integration of renewable energy sources (RES), primarily wind and solar, into the electric power system (EPS) in Croatia. It presents transmission system integration aspects for the particular case of this country. It explains the current situation and technical characteristics of the current conventional generation units and currently installed wind energy capacities. Based on the current situation future development scenario is determined and used to evaluate the impacts of the wide-scale integration of renewables. Grid connections aspects, power balancing, market participation, and inertia reduction aspects are considered. Furthermore, some specifics of both solar and wind integration are discussed identifying problems and potential solutions. Primarily through the provision of the inertial response of both solar and wind and through better forecasting of wind production. Finally, the outlook for the Croatian power system is given, that will most probably double its RES capacity in the coming 3-year period and a certain level of investments and changes of current operational practices will need to be provided.

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“…In November 2019, with the recent surge in variable renewable energy generation capacity being added to the system (both small-scale rooftop PV and large-scale wind and solar), the instantaneous penetration of renewable energy in the system rose above 50% for the first time [2]- [4]. As a result, there has been a noticeable downward trend in synchronous generator inertia in the SWIS over the last few years (as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Online Security Assessment of Low-Inertia Power Systems: A Real-Time Frequency Stability Tool for the Australian South-West Interconnected System

Fereidouni¹,

Susanto²,

Mancarella³

et al. 2020

Preprint

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In small/medium-sized isolated power networks with low rotational inertia and high penetration of renewables, generation/load contingency events may cause large frequency excursions, potentially leading to cascading failures and even blackouts. Therefore, it is crucial for system operators to be able to monitor the state of the network in real-time and predict the maximum possible frequency deviations at all times.This paper presents a real-time frequency stability (RTFS) tool developed by the Australian Energy Market Operator (AEMO) and operationalized in the control room for the South West Interconnected System (SWIS) to ensure that the available spinning reserve is sufficient and fast enough to arrest frequency excursions under any conditions, and particularly low-inertia ones. To reduce the computational burden and complexity of the different turbine-governor models, a simple first-order lag function with two adjustable variables has been used for each of the generator. These adjustable parameters, along with other key model parameters such as load damping and inertia, have been calibrated against actual frequency response using high-speed fault recorder data from historical events. As demonstrated in several case studies, the real-time tool has proven to be accurate at predicting the trajectory of system frequency after credible contingencies, thus suggesting that similar implementations could be carried out elsewhere while power systems worldwide progress towards lower inertia.

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Provision of ancillary services in future low-carbon UK electricity system

Cited by 13 publications

References 7 publications

Optimal Portfolio of Distinct Frequency-Response Services in Low-Inertia Systems

Optimal Portfolio of Distinct Frequency-Response Services in Low-Inertia Systems

Challenges of High Renewable Energy Sources Integration in Power Systems—The Case of Croatia

Online Security Assessment of Low-Inertia Power Systems: A Real-Time Frequency Stability Tool for the Australian South-West Interconnected System

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