In this paper, a novel parameter design approach of the PI controller used for individual DC voltage balancing control of cascaded H-bridge converter-based STATic synchronous COMpensator(STATCOM) is presented. By means of phase shift sinusoidal pulse width modulation, using two control loops(DC voltage control loop and phase angle shift control loop) to ensure DC voltage balance, the proposed a...

An electronic method of control that has been known since the early thirties is that of the phase-lock-loop technique. In this method the phase angle of a periodic signal whose frequency corresponds to the value of the quantity to be controlled is continuously compared with the phase angle of an applied signal whose frequency represents the specified value. A change in the phase difference betw...

Islanding is detected by all distributed generations (DGs), especially those connected at secondary distribution grids. Islanding methods are mainly classified in three main categories: Passive, Active, Communication based. Hybrid methods are first time discussed in this paper. These methods are under evolution and as their advantages are coming they become an important part of islanding detect...

This paper proposes an algorithm for direct flux and torque controlled three phase induction motor drive systems. This method is based on control of slip speed and decoupled between amplitude and angle of reference stator flux for determining required stator voltage vector. Within the given sampling time, flux as well as torque errors are controlled by stator voltage vector which is evaluated f...

The paper describes the development of a computer program designed to simulate the performance of the mass filter in an ideal quadrupole mass spectrometer (QMS). The simulation program provides flexible input parameters to allow the user to investigate the ion trajectories and transmission efficiency for different operating conditions. The program is used to analyse the change in QMS resolution...

The advanced static VAR compensator (now widely known as the static condenser or STATCON) uses a high power self-commutating inverter to draw reactive current from a transmission line. Two fundamentally different types of invertor can be used for this purpose, one providing control of output voltage magnitude and phase angle, and the other having only phase angle control. For each of these type...

Abstract The Power electronic based FACTS devices can be added to power transmission and distribution systems at strategic locations to improve system performance. This paper deals with the simulation of various FACTS controllers using simulation program with Integrated circuits Emphasis (PSPICE) .The FACTS controllers will control series impedance, shunt impedance, current, voltage and phase a...

Fault detection and electrical system monitoring (management) for aircraft/spacecraft dc or 400 Hz electrical systems is presented. Real-time ‘snapshot’ data is collected from current and voltage measurement transducers on radial or loop aircraft electrical system and introduced into a State Estimator. The State Estimator ‘smoothes’ the data, detects bad transducers, and calculates the best est...