Development of Wide Area Protection Scheme based on Power Measurements

This paper presents a new scheme for wide area protection of electrical networks. The new scheme depends on using average power with eliminating the need for phasor measurement units. This will be reflected positively on the processing time and cost. The new scheme will be denoted as power scheme. First, the proposed scheme is presented. It depends on measuring average power in a recursive form at each terminal of transmission lines. Then, the power difference for each line terminals is evaluated. The faulted line is that has the largest power difference between its terminals, or in other words has positive average power at one terminal and negative one at the other terminal. The proposed scheme is applied on IEEE 14 bus system. All simulations are carried out using MATLAB/SIMULINK software package. Several fault case studies are investigated to validate the effectiveness of the proposed scheme. The faulted line could be identified precisely and within a short time span after the fault occurrence.