Wind power impact on power system frequency response

Chamorro, Harold R.; Ghandhari, Mehrdad; Eriksson, Robert

doi:10.1109/naps.2013.6666880

Cited by 28 publications

(19 citation statements)

References 38 publications

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“…These large synchronous machines react naturally to the frequency deviations and large inertia guarantees that the ROCOF will be slow enough so that power generation plants are able to react to the change in frequency, either by increasing or decreasing their powers depending whether change in frequency is negative or positive, respectively. In fully renewable energy based power systems the inertia will become low, since the rotating mass of the connected synchronous machine is reduced [44,45]. The lower inertia means that connected frequency regulation reserves must be able to respond faster than currently.…”

Section: Frequency Stabilitymentioning

confidence: 99%

“…The system inertia is low with high penetration of variable RE since the rotating mass of the connected synchronous machines is reduced. The lower inertia means that connected frequency regulation reserves must be able to respond faster than currently [44,45]. In this study, rate of change of frequency (ROCOF) when only synchronous generation (hydropower, biomass power plants, and geothermal units) contributes to the frequency balancing was first calculated.…”

Section: Introductionmentioning

confidence: 99%

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Repercussion of Large Scale Hydro Dam Deployment: The Case of Congo Grand Inga Hydro Project

et al. 2018

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Abstract:The idea of damming the Congo River has persisted for decades. The Grand Inga project, of up to 42 GW power generation capacity, can only be justified as part of a regional energy master plan for Africa, to bridge the energy gap on the continent. Proponents of very large dams have often exaggerated potential multiple benefits of a mega dam, marginalise environmental concerns and neglect the true risk of such projects, in particular for the fragile economies of developing countries. Studies have reported the financial risks, cost overruns and schedule spills associated with very large dams. In addition, most of the dams in the region are poorly managed. Therefore, the type and scale of Grand Inga is not the solution for millions of not yet electrified people in Sub-Saharan Africa. In this research, scenarios are defined based on announced costs and expected costs. Cost escalations in the range from 5% to 100% for the Inga project in 2030 and 2040 are considered, as average cost overruns are typically at about 70% or higher for similar mega-dams. It was found that when the cost overrun for the Grand Inga project exceeds 35% and −5% for 2030 and 2040 assumptions, respectively, the project becomes economically non-beneficial. In all scenarios, Sub-Saharan Africa can mainly be powered by solar photovoltaics to cover the electricity demand and complemented by wind energy, supported by batteries. Hydropower and biomass-based electricity can serve as complementary resources. The grid frequency stability of the power system is analysed and discussed in the paper. Benefits of the Inga hydropower project have to be increasingly questioned, in particular due to the fast cost decline of solar photovoltaics and batteries.

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Section: Frequency Stabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Repercussion of Large Scale Hydro Dam Deployment: The Case of Congo Grand Inga Hydro Project

et al. 2018

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“…Several approaches can be found in the literature on the contributions of frequency support to the regulation of wind turbines [25,26]. In general, VSWT provide negligible inertia since the fast control of power electronic converters maintains a practically constant output power irrespective of changes in the frequency of the grid [27].…”

Section: Introductionmentioning

confidence: 99%

Frequency Regulation of a Hybrid Wind–Hydro Power Plant in an Isolated Power System

2018

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Currently, some small islands with high wind potential are trying to reduce the environmental and economic impact of fossil fuels by using renewable resources. Nevertheless, the characteristics of these renewable resources negatively affect the quality of the electrical energy, causing frequency disturbances, especially in isolated systems. In this study, the combined contribution to frequency regulation of variable speed wind turbines (VSWT) and a pump storage hydropower plant (PSHP) is analyzed. Different control strategies, using the kinetic energy stored in the VSWT, are studied: inertial, proportional, and their combination. In general, the gains of the VSWT controller for interconnected systems proposed in the literature are not adequate for isolated systems. Therefore, a methodology to adjust the controllers, based on exhaustive searches, is proposed for each of the control strategies. The control strategies and methodology have been applied to a hybrid wind-hydro power plant on El Hierro Island in the Canary archipelago. At present, in this isolated power system, frequency regulation is only provided by the PSHP and diesel generators. The improvements in the quality of frequency regulation, including the VSWT contribution, have been proven based on simulating different events related to wind speed, or variations in the power demand.

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“…Some of the aspects which can be affected by the inclusion of non-synchronous generation are the frequency control and inertia, the local system protection schemes, and the oscillatory stability [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Influence of the increasing non-synchronous generation on Small Signal Stability

Chamorro

Ghandhari

Eriksson

2014

2014 IEEE PES General Meeting | Conference &Amp; Exposition

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Abstract-The increasing installation of aggregated renewable generation based Full Rated Converters (FRC) in current power systems is modifying their dynamic characteristics. This paper analyses the influence of large scale inclusion of non-synchronous generation through back-to-back Voltage Source Converters' (VSC) connection on power systems, by presenting the dynamic changes on inter-area oscillations in different penetration level cases. The aggregated model of VSC units is assumed. The Small Signal Stability Analysis (SSSA) is used to show the dynamic behaviour and presents the performance of the power systems related to the domain frequency modes in a test grid system. From the analysis, it is shown that the mode shapes and participation factors are displaced according to the penetration levels. Eigenvalue sensitivity analysis according to the inertia is also applied, showing the impact of the large penetration of nonsynchronous generation.

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Wind power impact on power system frequency response

Cited by 28 publications

References 38 publications

Repercussion of Large Scale Hydro Dam Deployment: The Case of Congo Grand Inga Hydro Project

Repercussion of Large Scale Hydro Dam Deployment: The Case of Congo Grand Inga Hydro Project

Frequency Regulation of a Hybrid Wind–Hydro Power Plant in an Isolated Power System

Influence of the increasing non-synchronous generation on Small Signal Stability

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