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Conference Paper: Risk assessment of critical time to renewable operation with steady-state security region

TitleRisk assessment of critical time to renewable operation with steady-state security region
Authors
KeywordsRenewables integration
Flexibility requirements
Steady-state security region
Fourier-Motzkin elimination
Chebychev center
First hitting time
Issue Date2014
Citation
The 18th Power Systems Computation Conference (PSCC 2014), Wroclaw, Poland, 18-22 August 2014. How to Cite?
AbstractUncertain and variable characteristics of renewable energy resources introduce challenges to power system operation. A normal operating point might be drifted towards an unreliable operating point due to stochastic outputs od renewables. This paper proposes a novel method for estimating critical time to unreliable operating point with steady-state constraints. In this work, a stochastic differential equation is employed to describe the distribution of renewables with predictable tendency and stochastic errors of prediction; meanwhile, the DC power flow based steady-state security region is used to restrict the injected space. To find the critical time that uncontrollable renewables leave the security region, according the flexibility requirements defined by NERC, the uncontrollable region is identified with the Fourier-Motzkin elimination first. And then, by solving the Chebychev center problem, the critical distance for variable renewable outputs is obtained. Finally, an analytical solution of expected exit-time for renewable outputs leaving the security region is given with the Martingale stopping theorem. The proposed method can be used to construct the condition-driven risk indicators. An illustrative example is employed to demonstrate and validate the proposed method.
DescriptionPS10: Risk Assessment in Power System Operation: ID 371
Persistent Identifierhttp://hdl.handle.net/10722/204100

 

DC FieldValueLanguage
dc.contributor.authorHou, Yen_US
dc.contributor.authorYan, Jen_US
dc.contributor.authorPeng, Cen_US
dc.contributor.authorQin, Zen_US
dc.contributor.authorLei, Sen_US
dc.contributor.authorRuan, H-
dc.date.accessioned2014-09-19T20:05:30Z-
dc.date.available2014-09-19T20:05:30Z-
dc.date.issued2014en_US
dc.identifier.citationThe 18th Power Systems Computation Conference (PSCC 2014), Wroclaw, Poland, 18-22 August 2014.en_US
dc.identifier.urihttp://hdl.handle.net/10722/204100-
dc.descriptionPS10: Risk Assessment in Power System Operation: ID 371-
dc.description.abstractUncertain and variable characteristics of renewable energy resources introduce challenges to power system operation. A normal operating point might be drifted towards an unreliable operating point due to stochastic outputs od renewables. This paper proposes a novel method for estimating critical time to unreliable operating point with steady-state constraints. In this work, a stochastic differential equation is employed to describe the distribution of renewables with predictable tendency and stochastic errors of prediction; meanwhile, the DC power flow based steady-state security region is used to restrict the injected space. To find the critical time that uncontrollable renewables leave the security region, according the flexibility requirements defined by NERC, the uncontrollable region is identified with the Fourier-Motzkin elimination first. And then, by solving the Chebychev center problem, the critical distance for variable renewable outputs is obtained. Finally, an analytical solution of expected exit-time for renewable outputs leaving the security region is given with the Martingale stopping theorem. The proposed method can be used to construct the condition-driven risk indicators. An illustrative example is employed to demonstrate and validate the proposed method.-
dc.languageengen_US
dc.relation.ispartof18th Power System Computation Conference, PSCC 2014en_US
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectRenewables integration-
dc.subjectFlexibility requirements-
dc.subjectSteady-state security region-
dc.subjectFourier-Motzkin elimination-
dc.subjectChebychev center-
dc.subjectFirst hitting time-
dc.titleRisk assessment of critical time to renewable operation with steady-state security regionen_US
dc.typeConference_Paperen_US
dc.identifier.emailHou, Y: yhhou@hku.hken_US
dc.identifier.authorityHou, Y=rp00069en_US
dc.description.naturepostprint-
dc.identifier.hkuros239408en_US

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