For High power, high voltage applications modern ages multilevel inverters are widely used. They ... more For High power, high voltage applications modern ages multilevel inverters are widely used. They provide better operation as well as effective efficiency rather than conventional two level inverters which differs in harmonic distortion, lower electromagnetic interference with large dc link voltage ratings. In multilevel inverters have problems in the sequence of number of components, complex pulse width modulation control method and voltage balancing problem. In this paper new topology is discussed which compensate the disadvantages by reversing voltage component. Where this method need of few more components other than conventional inverters, require fewer carrier signals and gate drives. Especially for High power output voltage levels the overall cost and complexity are reduced greatly. A prototype of seven level inverter is discussed with simulation of MATLAB which tested with simulation results.
Necessity of Power System State Estimation: A Generalized Linear State Estimation Solution with Application of PMU Measurements
Lecture Notes in Electrical Engineering, 2020
This paper presents a review on major blackouts occurred in power grid across the world and impor... more This paper presents a review on major blackouts occurred in power grid across the world and importance for the need of state estimation (SE) solution. This work introduces the applications of phasor measurement units (PMU) to reduce the occurrence of blackouts in power system. The blackouts in power system can occur due to overload, light load conditions, heavy storms or due to line outages. The cascade failure due to line outages, i.e., measured as N-1 outages can lead to power system blackout. The necessity of power system state estimation (PSSE) solution for protection in view of blackouts is discussed in this paper. A Generalized Linear State Estimation (GLSE) method is proposed to obtain robust and accurate states of power system network. A matrix integrating phasor and conventional measurements are formulated to obtain accurate states. IEEE transmission bus network such as 14-bus network is considered as test case for proposed GLSE programming in MATLAB. The accurate states are computed and compared with standard weighted least squares (WLS) method to show its effectiveness.
Uploads
Papers by N PRANEETH