Generation Rescheduling Based Contingency Constrained Optimal Power Flow Considering Uncertainties Through Stochastic Modeling

Mohammad Nasir, Ali Sadollah, Hassan Barati, Mona Khodabakhshi, Joong Hoon Kim

Research output: Contribution to journalArticlepeer-review


The generation rescheduling is described as the power generation shifting from one or more generators to one or more other generators as a preventive action to improve and maintain the security of the power system. Since, there is a direct link between security improvement and the lines overload under contingencies, by rescheduling generation, the transmission lines become more flexible and thus, the overload can be relieved. In this paper, contingency constrained optimal power flow (CCOPF) problem based on generation rescheduling by considering the uncertainty of photovoltaic (PV), wind turbine (WT), and plug-in hybrid electric vehicle (PHEV) have been addressed. Water cycle algorithm (WCA) using its potential in finding optimal solution has been used in order to reschedule the generators and optimize the total fuel cost, power losses under contingency scenario, and system security. Moreover, stochastic approach has been proposed for taking into account the uncertainty of PV, WT, and PHEV. Overall performance index including the power and the voltage severity indices have been provided for determining overloaded transmission lines due to the lines’ outage and consequently elimination of overloaded lines. The efficiency of the proposed algorithm has been evaluated on two IEEE-30 and IEEE 118-bus systems. The results are compared with the results of other classical and metaheuristic optimization algorithms. The simulations reveal that the WCA outperforms the other reported optimizers, and is more efficient and effective in improving security for power systems. In addition, the obtained numerical results show that renewable energy sources can significantly reduce fuel costs.

Original languageEnglish
JournalIETE Journal of Research
Publication statusAccepted/In press - 2023

Bibliographical note

Publisher Copyright:
© 2023 IETE.


  • Contingency analysis
  • Generation rescheduling
  • Optimal power flow
  • Power system security
  • Stochastic modeling
  • Uncertainty
  • Water cycle algorithm

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science Applications
  • Electrical and Electronic Engineering


Dive into the research topics of 'Generation Rescheduling Based Contingency Constrained Optimal Power Flow Considering Uncertainties Through Stochastic Modeling'. Together they form a unique fingerprint.

Cite this