A Time-Dependent Approach to Evaluate Capacity Value of Wind and Solar PV Generation

Mosadeghy, Mehdi; Yan, Ruifeng; Saha, Tapan Kumar

doi:10.1109/tste.2015.2478518

Cited by 47 publications

(45 citation statements)

References 26 publications

(40 reference statements)

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“…In this paper time dependent clustering method [5] is utilized to evaluate the reliability benefits of wind power in VIC and NSW. In this method, load, wind power and exchanged electricity are modelled as time dependent clusters and hourly reliability indices of the system are calculated based on the hourly values of these clusters.…”

Section: Reliability Assessmentmentioning

confidence: 99%

“…Multistate generator [1], negative load [2], clustered model [3] and probabilistic model [4] are some of these methods. In this work, a time dependent clustering technique [5] is applied to model wind power. This method models wind output, load and exchanged power as time dependent clusters to keep the correlation between them and capture their time dependent features.…”

Section: Introductionmentioning

confidence: 99%

“…This method models wind output, load and exchanged power as time dependent clusters to keep the correlation between them and capture their time dependent features. In addition, as this technique is not using chronological data, it is efficient in term of computational time [5].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The impact of interconnections on reliability contribution of wind farms

Mosadeghy

Yan

2015

2015 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

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Abstract-This paper studies reliability benefits of wind energy in two different systems in Australia: New South Wales and Victoria. Reliability assessment has been conducted in generation system level and a time dependent clustering method is applied to model wind power. This technique not only can capture time dependent attributes of wind energy, but also is capable of keeping the correlations between wind power and demand. Furthermore, different scenarios have been studied to investigate the impact of interconnectors on the reliability benefit of wind farms. Results show that the impact of exchanged power through tie lines can be dissimilar for different systems and is mainly related to the direction of the flowing power.Index Terms-Generation adequacy, Monte Carlo method, reliability assessment, load carrying capability, wind power.

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Section: Reliability Assessmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The impact of interconnections on reliability contribution of wind farms

Mosadeghy

Yan

2015

2015 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC)

Self Cite

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“…However, solar radiation, wind velocity and wind direction are unpredictable and change rapidly based on the variations of environmental conditions [9][10][11][12][13]. Therefore, an individual power conditioning for each of the individual system is required to operate the interconnected renewable systems more efficiently.…”

Section: Introductionmentioning

confidence: 99%

Independent MPPTracking Method of Hybrid Solar-Wind Power Conditioning Systems Using Integrated Dual-Input Single-PWM-Cell Converter Topology

Thenathayalan¹,

Ahmed²,

Choi³

et al. 2017

Journal of Electrical Engineering and Technology

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-This paper proposes the modeling and control strategy to track the MPPs of hybrid PV and Wind power systems, using a new dual input boost converter. The dual input power conditioning system with an independent MPPT control scheme is introduced with minimum number of circuit elements in order to reduce the switching loss, size and cost of the system. Since the operating conditions for the PV and Wind power systems are very distinct from each other, an efficient and superior control system is required to track the MPPs of both renewable sources with the use of a simply-structured single-ended single-inductor converter. The design of Power-Conditioning System (PCS) and detail control strategy are presented in this paper. To provide independent tracking of MPPs, a variable duty-cycle control strategy is employed for the wind system and a variable frequency strategy is employed for the PV system. Finally, the proposed dual-input converter for hybrid power conditioning system is implemented and the hardware test results are presented. From the hardware experiment, it is concluded that the proposed system successfully tracks the MPPs of both of the renewable power systems independently.

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“…In this regard, a number of probabilistic and analytical approaches have been established in recent years [57,58]. Researchers are continuously working to develop improved methods to estimate the reliability contributions of wind resources.…”

Section: Reliability Contributionsmentioning

confidence: 99%

Security assessment due to increased wind generation in a complex power grid

Masood¹

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Wind energy is becoming a major source of generation in many countries because of its zero fuel cost and no air pollution. Due to the integration of large-scale wind power in conventional grids, synchronous generators are being economically replaced. Modern wind turbine generators (WTGs) are based on power electronic interfaces. Hence, unlike synchronous generators, they do not usually provide inertia and governor response. Therefore, from a power system security point of view, wind penetration can be limited by frequency response criteria. Up to now, several methodologies have been proposed to estimate the maximum wind penetration level. However, none of them suggest how a system operator could be immediately informed about a secured wind penetration limit as soon as a generation profile is known. Therefore, a tool to estimate the maximum wind penetration level by maintaining an adequate frequency response is proposed in this thesis. The proposed tool is able to instantly provide the highest margin of wind power that could be dispatched at a particular load condition without violating frequency response constraints.In some power systems, the combined generation capacity of wind and distributed photovoltaic (PV) sources is close to reaching the level of average demands (e.g. South Australia). Under high availability of wind and PV, a few synchronous machines may be required to be committed for frequency regulation and hence the system can be viewed as a low inertia grid. Such a grid could be potentially at risk of experiencing an excessive rate of change of frequency (ROCOF) after a contingency. A high ROCOF may initiate tripping of other synchronous generators. As a result, network frequency response may become more vulnerable and the system may be subject to significant under frequency load shedding (UFLS) or even at risk of a blackout. Furthermore, some existing distributed PV units may have a default under frequency protection setting, which is higher than the UFLS threshold. Hence, a contingency may cause a subsequent trip of those PV units. It may result in an unacceptable low frequency, triggering further load shedding. To explore the above issues, the effects of cascading contingencies triggered by high ROCOF and PV tripping on the frequency response of a low inertia grid are investigated in this thesis. Remedial measures using synchronous condenser and WTG frequency support to prevent the cascading contingencies are also suggested.Any mismatch between load and generation is intended to be balanced by contingency reserve, which is also known as contingency Frequency Control Ancillary Services (FCAS) requirement.Load frequency relief (LFR), which represents the effect of frequency dependent loads on power system frequency excursion, is crucial for correctly evaluating contingency FCAS requirement during a generation dispatch to ensure an adequate frequency response. Conventionally, the LFR is iii considered as a fixed quantity during the estimation of frequency response and FCAS requirement.How...

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A Time-Dependent Approach to Evaluate Capacity Value of Wind and Solar PV Generation

Cited by 47 publications

References 26 publications

The impact of interconnections on reliability contribution of wind farms

The impact of interconnections on reliability contribution of wind farms

Independent MPPTracking Method of Hybrid Solar-Wind Power Conditioning Systems Using Integrated Dual-Input Single-PWM-Cell Converter Topology

Security assessment due to increased wind generation in a complex power grid

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