Numerical Simulation of Electric Power Transmission and Distribution Equipment

Hajime Urai, Dr. Eng. Takahide Matsuo Hiroaki Hashimoto Tatsuro Kato, Dr. Eng. OVERVIEW: The market for electric power transmission systems is expected to grow strongly, driven by growing demand for electric power in emerging economies and the adoption of renewable energy. Transformers, circuit breakers, and switchgear are important components of these electric power transmission systems. The emphasis in their development is shifting away from the past focus on technical enhancements like higher voltages and capacities toward economic performance and reduced load on the environment. Limit design plays an important role in achieving good economic performance, and Hitachi is working on enhancing its analysis techniques. Of particular interest are techniques for the analysis of transformer losses and cooling, hot gas flow analysis and mechanical dynamics of high-voltage circuit breakers, and discharge analysis of dryair-insulated switchgear, which are among the latest analysis techniques.