A PSCAD Short-circuit Generator simulation for CEPEL’s High-Power Laboratory expansion solution proposal

Abstract

CEPEL’s (Electrical Energy Research Center) high-power laboratory uses specialized short-circuit transformers to conduct tests on various equipment. However, the laboratory’s testing capabilities are limited by restrictions imposed by the power grid. This limitation is due to the need for the electrical network to provide high power in a short period of time to reach the test current. As short-circuit levels of electrical equipment continue to advance, there is a growing demand for short-circuit applications that easily surpass 400 MVA. The main contribution of this work is the utilization of PSCAD modeling to propose a solution aimed at enhancing the flexibility and efficiency of Cepel’s power laboratory. The methodology, employing a transient analysis software, demonstrates that through the superexcitation method, the short-circuit generator can meet the high-power requirements of the laboratory, generating sufficient short-circuit power to test the equipment. This study addresses the lab’s underuse issues and offers a sustainable solution to meet the growing needs of national projects. Moreover, the research underscores the significant advantage of employing a short-circuit generator compared to the current setup, showcasing a threefold increase in efficiency based on power density per square meter. Recognizing the need for laboratory expansion, this approach demonstrates a viable path forward to accommodate the increasing requirements for high-power testing.