Application of interior point methods to power flow unsolvability

Granville, S.; Mello, J.C.O.; Melo, A.C.G.

doi:10.1109/59.496200

Cited by 177 publications

(67 citation statements)

References 20 publications

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“…The disadvantage is using load shedding to restore solvability. In 1996, Granville et al adopted the direct interior point method in an optimal power flow in order to calculate the minimum load shedding to restore the power flow [6]. This method had some advantages like ability to take in account all constraints, combination reactive power control and minimizing load shedding, and overcoming problem of Jacobian matrix singularity with conventional power flow.…”

Section: Introductionmentioning

confidence: 99%

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A New Approach for Corrective and Preventive Control to Unsolvable Case in Power Networks having DERs

Dinh¹,

Nguyen²,

Yoon³

2013

Journal of Electrical Engineering and Technology

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-Recently, Korean system operating conditions have gradually approached an upper limit.When a contingency occurs, the power system may have no solutions. Different from the cases of bad initial guesses or the solutions are too close to the solvability boundary in which numerical methods can be applied, for unsolvable cases, the only way to restore solvability would be structure modifications. In this paper, a new approach for corrective and preventive control to such cases is proposed in two steps: (i) finding any solution regardless its feasibility; (ii) for the infeasible solution, make it feasible with additional modifications at load buses having Distributed Energy Resources. The test case built based on the peak load profile of 2008 by KEPCO including 1336 buses is analyzed. Since reactive power compensation is optimized to restore solvability, all demands are met, therefore no blackouts happen. The proposed method was integrated in the LP program designed by power21 Corporation.

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Section: Introductionmentioning

confidence: 99%

“…However, for the last case, the only way to restore solvability would be structure modifications. A significant number of researchers have proposed various methods to deal with this problem [4][5][6][7][8][9][10]. These works, in fact, have their own advantages, limitations and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

A New Approach for Corrective and Preventive Control to Unsolvable Case in Power Networks having DERs

Dinh¹,

Nguyen²,

Yoon³

2013

Journal of Electrical Engineering and Technology

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“…The conventional UVLS scheme is formulated as an optimal power flow (OPF) problem to minimize the load shedding amount by considering operational and stability constraints [4]. In [5], a UVLS scheme was proposed to minimize load shedding considering load flow equations, while the security constraints of the network were neglected. A risk-based method to design a UVLS scheme was proposed in [6].…”

Section: Introductionmentioning

confidence: 99%

A robust undervoltage load shedding scheme against voltage instability

Kaffashan¹,

Mortezaee²,

Amraee³

2016

Turk J Elec Eng & Comp Sci

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Abstract:Undervoltage load shedding (UVLS) is an effective measure for restoring voltage stability as a last resort in emergency conditions. In this paper, a UVLS scheme is proposed considering the uncertainties of load and line parameters. The loading margin is considered as the voltage stability index. The proposed scheme determines the optimal load shedding pattern subject to technical constraints. The info-gap decision theory uncertainty modeling technique is utilized to find a robust and cost-effective pattern of load shedding. The proposed scheme is formulated as a nonlinear programming problem, which is solved using the sequential quadratic programming technique. The performance of the proposed scheme is verified for the IEEE-14 bus and IEEE-118 bus test systems.

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“…Several optimization techniques have been proposed to handle the OPF problem [7]- [9]. Recently, the research in OPF such as interior point (IP) using new optimization techniques, has been gaining wider attention in power system operation [10], [11]. The interior point method is faster and more reliable for achieving feasibility and convergence.…”

Section: Introductionmentioning

confidence: 99%

An IPM-CFAPSO based Hybrid Method for Multiple Objective Minimizations using TCPS

Balasubbareddy¹,

Obulesh²,

Raju³

2012

IJCA

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This paper presents an Interior Pont Method (IPM) and variant of Particle Swarm Optimization (CFAPSO) based hybrid method to solve optimal power flow in power system incorporating Flexible AC Transmission Systems (FACTS) such as Thyristor Controlled Phase Shifter (TCPS) for minimization of multiple objectives. The proposed IPM-CFAPSO algorithm identifies the optimal values of generator active-power output and the adjustment of reactive power control devices. The proposed optimization process with IPM-CFAPSO is presented with case study example using IEEE 30-bus test system to demonstrate its applicability. The results are presented to show the feasibility and potential of this new approach.

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Application of interior point methods to power flow unsolvability

Cited by 177 publications

References 20 publications

A New Approach for Corrective and Preventive Control to Unsolvable Case in Power Networks having DERs

A New Approach for Corrective and Preventive Control to Unsolvable Case in Power Networks having DERs

A robust undervoltage load shedding scheme against voltage instability

An IPM-CFAPSO based Hybrid Method for Multiple Objective Minimizations using TCPS

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