Operational Risk Metric for Dynamic Security Assessment of Renewable Generation

Datta, Sohom; Vittal, Vijay

doi:10.1109/tpwrs.2016.2577500

Cited by 24 publications

(10 citation statements)

References 25 publications

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“…The test system that was developed in [24] is used to examine the proposed reliability evaluation approach considering ERSs assessment and to study the impact of increasing wind penetration. The test system is generated to represent a synthetic system that includes the major features of a realistic power system for stability and reliability studies for system planning.…”

Section: A Test System and Base Scenariomentioning

confidence: 99%

“…The test system is generated to represent a synthetic system that includes the major features of a realistic power system for stability and reliability studies for system planning. The details of the test system are provided in [24].…”

Section: A Test System and Base Scenariomentioning

confidence: 99%

“…Comparison of frequency trajectory on bus 19 under different wind penetration Frequeny response of generators under 80% wind power penetration Single line diagram of the test system[24] …”

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confidence: 99%

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Composite System Reliability Evaluation With Essential Reliability Services Assessment of Wind Power Integrated Power Systems

Wang

Vittal

Khorsand

et al. 2020

IEEE Open J. Power Energy

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With the increasing penetration of renewable resources and the retirements of conventional coal-fired generation units, power systems are undergoing significant transformation with the instantaneous renewable generation penetration sometimes approaching over 50 percent of the demand. This transformation makes the need for comprehensive reliability assessment critical to properly account for the composite system adequacy and the sufficiency of essential reliability services (ERSs). This paper introduces a probabilistic approach to evaluate the reliability of wind power integrated power systems considering ERSs including frequency and voltage support, in conjunction with resource adequacy. To consider stochasticity in system operating conditions, the proposed approach utilizes sequential Monte-Carlo Simulation (SMCS) as the probabilistic analysis methodology and formulates probabilistic reliability metrics representing the composite system adequacy and the ERSs. The proposed approach and metrics are demonstrated on a synthetic test system. Simulation results illustrate the efficacy of the proposed approach and its importance in analyzing the impact of increasing wind power penetration as well as wind turbine generators (WTGs) providing ERSs on system reliability. Index Terms-Essential reliability services, frequency control, Monte-Carlo Simulation, reliability metrics, voltage control, wind power penetration. NOMENCLATURE Abbreviations AC Alternating current. COV Coefficient of variation. EGAF Expected generator tripping caused by abnormal frequency. EGAV Expected generator tripping caused by abnormal voltage. ELCC Effective load carry capability. EOAF Expected occurrence of abnormal frequency at generator terminals. EOAV Expected occurrence of abnormal voltage at generator terminals. EPNS Expected power not supplied. LOLP Loss of load probability.

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Section: A Test System and Base Scenariomentioning

confidence: 99%

Section: A Test System and Base Scenariomentioning

confidence: 99%

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Composite System Reliability Evaluation With Essential Reliability Services Assessment of Wind Power Integrated Power Systems

Wang

Vittal

Khorsand

et al. 2020

IEEE Open J. Power Energy

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“…The risk index comprised probability and the severity factor, with the latter based on the difference between the actual and the maximal current flows over the branches. Datta and Vittal [15] introduced a risk measure similar to the one presented in this paper. They showed that introducing wind generation strengthens IET Gener.…”

Section: Literature Reviewmentioning

confidence: 99%

Methodology of risk assessment and decomposition in power grid applications

Wawrzyniak

Padrón

Gomulski

et al. 2018

IET Generation, Transmission & Distribution

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“…Appropriate risk‐assessment of the power system may help in managing certain risks within acceptable limits for planning, design and/or operational purpose . An example is a security risk measure that was investigated in and for contingency analysis using so‐called “Zonal risk assessment”. By normalizing the scales of the consequence and occurrence of an event, a log‐log risk chart is utilized for the potential failure estimation .…”

Section: Introductionmentioning

confidence: 99%

New risk analysis considering spatial correlations among connected PVs for bidirectional distribution feeders

Al‐Saadi

Živanović

Al-Sarawi

2020

Int Trans Electr Energ Syst

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Summary The distribution networks are in a transition stage from being “passive” (consuming energy and typically with unidirectional power flows) into “active” (consuming/producing energy with bidirectional power flows). This transition has exposed the networks to stochastically behaving risks such as violation of the prescribed limits of power quality or overloading the network elements. The current paper presents a new risk analysis to quantify the risks of violating operational constraints due to a large number of small‐size Photovoltaics (PVs). Risk's likelihood and severity are estimated based on the relative frequency of the number and the relative frequency of the accumulative depth of a violation, respectively. This article has two objectives. The first is to determine the hosting capacity of the targeted network. The second is to address the effect of spatial correlation on risk quantification, specifically the effect of perfectly positive correlation (PEC) to the effect of partially positive correlation (PAC). Modelling PAC through spatial rank correlation is established utilizing the Nataf transformation due to the non‐Gaussianity of the probability densities of PV uncertainties. The approach is implemented on two distribution networks: IEEE 13 bus test distribution feeder and a large distribution network with multiple zones situated in South Australia. The approach is location‐specific and time‐varying. Hosting capacity is determined with the results of PEC showed an overestimation of the problem in comparison with the more realistic simulation under PAC. The analysis outcomes can help distribution network operators in managing and regulating the growing risks of high PV penetration.

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Operational Risk Metric for Dynamic Security Assessment of Renewable Generation

Cited by 24 publications

References 25 publications

Composite System Reliability Evaluation With Essential Reliability Services Assessment of Wind Power Integrated Power Systems

Composite System Reliability Evaluation With Essential Reliability Services Assessment of Wind Power Integrated Power Systems

Methodology of risk assessment and decomposition in power grid applications

New risk analysis considering spatial correlations among connected PVs for bidirectional distribution feeders

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