Risk Assessment Model and Method of Power System in Storm Climate

doi:10.3969/j.issn.1000-7229.2015.02.004

Abstract

Abstract:

This paper established a risk assessment model for power system in storm climate, to make up the weakness of traditional risk assessment that the model ignored the climate impact of wind and rain so that assessment results were too optimistic. The optimal AC power flow model was used to calculate the system load shedding, obtain the minimum load shedding and assess the low voltage risk of system, which could effectively improve the problem in traditional DC power flow model that the low voltage risk of nodes could not be directly assessed. The system load shedding was obtained with using optimal power flow, which could effectively improve the problem that the power flow calculation did not converge so that the load shedding could not be obtained or the calculation of the load shedding was inaccurate. Finally, this method was used to calculate the modified IEEE-RT79 system. The results show that the proposed method is effective and feasible. Meanwhile, the overload risk and low voltage risk of modified system were assessed, whose results could provide a reference basis for the planning and operation of power grid in storm climate.

Key words: storm climate, minimum load shedding, overload risk, low voltage risk, risk assessment

MO Ruohui1, ZUO Junjun2, LONG Yufang2, LAN Fei2, HU Jianchen1, LI Xian1, WU Feng1, QI Yongfu1, WU Yunliang1. Risk Assessment Model and Method of Power System in Storm Climate[J]. ELECTRIC POWER CONSTRUCTION, 2015, 36(2): 21-26.

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