Comparative analysis of a new VSC‐optimal power flow formulation for power system security planning

Abstract

Summary The performance of a new approach for multiobjective voltage stability constrained‐optimal power flow (VSC‐OPF) formulation is compared with a conventional VSC‐OPF approach for improving the steady‐state power systems security in this paper. The compared OPF problems involve the minimization of the fuel cost and minimization of novel line stability index (NLSI) for case 1 and minimization of fuel cost and maximization of line static stability margin (CBI) for the proposed case 2. Clerc's constricted PSO algorithm modified with the nondominated sorting algorithm is used for obtaining the best solution point for each of the decision variables. Network security constraints and bus voltage limits are considered along with the constraint on permissible line stability margin limit adopting the quadratic penalty model for constraints violations. The approach is tested on a load‐modified IEEE 30‐bus and actual Nigerian 28‐bus systems. From the results obtained, the proposed OPF formulation performed better for simultaneous consideration of voltage stability improvement and line loss reduction.

Optimal reactive power dispatch: a bibliometric analysis

“…Author details 1 Faculty of Electrical and Electronics Engineering, Universiti Malaysia Pahang, 26600 Pekan, Pahang, Malaysia. 2 Department of Mechatronics, Faculty of the Engineering, Bayero University, Kano, Nigeria.…”

“…The power grid consists of three main stages, namely generation, transmission and distribution, which delivers the power to both industrial and residential consumers. The power network needs to be robust to accommodate all the dynamic factors associated with the system [1,2]. Usually, network losses in a power system vary between 5 and 10% of the total generation, which translates to millions of dollars per annum [3].…”

Multiobjective optimal power flow for static voltage stability margin improvement

“…Instead, the objective function should incorporate or focus on the voltage stability enhancement to guarantee system security [ 3 ]. Hence, the renewed interest in voltage stability constrained optimal power flow problems [ 1 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ].…”

“…Upon having the Pareto-optimal set of non-dominated solutions, a fuzzy decision-making technique is applied to sort out the best compromise solution to the decision-maker. In [ 4 ], a multiobjective optimization considering two indices, novel line stability index (NLSI) and critical boundary index (CBI), was performed for stressed system conditions. The analysis revealed that multiobjective VSC-OPF incorporating VSIs enhanced the stability by about 64.558% higher than the single-objective approach [ 22 ].…”

“…The analysis revealed that multiobjective VSC-OPF incorporating VSIs enhanced the stability by about 64.558% higher than the single-objective approach [ 22 ]. Furthermore, the cost and loss reduction in the VSC-OPF approach [ 4 ] was higher by 0.19% and 9.837%, respectively. Authors in [ 23 ] also solved a multiobjective OPF of a wind-thermal power system while incorporating the Voltage Stability Enhancement Index (VSEI).…”