Accurate Instantaneous Voltage Magnitude and Phase Angle Measurements for Dynamic Monitoring of Power System
The main aim of this paper is to find the instantaneous phase angle calculation and magnitude accurately for dynamic monitoring of the power system. Nowadays, power demand increases very rapidly, to satisfy the growing load demand. To fulfill this load demand power generating stations are growing, but due to many reasons generating stations are far away from the load centers. From the generating stations to load centers power is transmitted by using long transmission lines. In this transmission system, many interconnections are there. With this, power flow changes very dynamically in the lines. For the calculation of dynamic power flow in the lines voltage magnitude and instantaneous phase angle values are required. For the calculation of magnitude and phase angle windowed, Recursive and Non-Recursive Discrete Fourier Transform (DFT) techniques are available. But these methods may be suitable for steady-state view of the power system. In this paper, a new approach is proposed to calculate the instantaneous phase angle and magnitude of the voltage signal. This method will give instantaneous phase angle and voltage values more accurately with time stamping according to IEEE standard C37.118.1-2011 for dynamic monitoring of the power system. With the Global Positioning System (GPS) timestamp to the measured values, it is possible to synchronize the data from the different locations of the power system, and dynamic power flow in the lines is possible.