A speed measurement method for fast assessment of power system transient stability

摘要

The demand for fast measurement of angular speed has been increased in recent years for many online applications. In particular, early fault detection and transient stability assessment and control. This paper presents a new fast-speed measurement method for computing the rate of change of kinetic energy (RACKE) in real-time. RACKE is an effective criterion for assessment of transient stability in power systems, which was thoroughly investigated using computer simulation. Design and implementation of the proposed speed measurement method is based on a 16-bit microprocessor system and associated hardware circuitry for interfacing an electromagnetic speed sensor to a power system simulator. Operation principle of the proposed method is mathematically formulated and implemented using an efficient software algorithm. Performance of the proposed speed measurement method is assessed experimentally using a single machine infinite bus power system. The obtained results and observations have demonstrated high accuracy and efficient time complexity. This allows for further investigation of RACKE criterion using practical implementations rather than computer simulations.