Optimal power flow solutions under variable load conditions
| Autor: | K.C. Almeida, R. Salgado |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Electric power system
Nonlinear system Operating point Mathematical optimization Karush–Kuhn–Tucker conditions Flow (mathematics) Control theory Energy Engineering and Power Technology Sensitivity (control systems) Linear approximation Electrical and Electronic Engineering Interior point method Mathematics |
| Zdroj: | IEEE Transactions on Power Systems. 15:1204-1211 |
| ISSN: | 0885-8950 |
| DOI: | 10.1109/59.898091 |
| Popis: | This work presents a methodology to calculate a sequence of optimal power flow (OPF) solutions under variable load conditions. The aim is to obtain a set of optimal operating points in the neighborhood of the bounds of the region defined by the load flow equations and a set of operational limits. For this, an algorithm based on the continuation method and on a primal-dual interior point optimization method is proposed. Such an algorithm consists of two main steps: the predictor step, which uses a linear approximation of the Karush-Kuhn-Tucker (KKT) conditions to estimate a new operating point for an increment in the system load; and the corrector step, which calculates the optimum corresponding to the new load level via a nonlinear primal-dual interior point method. Indices for critical buses and inequality constraints are a byproduct of the methodology. In addition, sensitivity analysis is performed to calculate the amount of reactive compensation which allows for a pre-specified increase in the system load. Results for realistic test systems are presented. |
| Databáze: | OpenAIRE |
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