Three-phase electric power

Solving Electric Power Transmission Line Faults Using Hybrid Artificial Neural Network Modules Chukwuedozie N. Ezema1, Patrick I. Obi 1 and Chukwuebuka N. Umezinwa 2 1 Department of Electrical /Electronic Engineering, Chukwuemeka Odumegwu Ojukwu University (COOU), Uli, Anambra State, Nigeria 2 Department of Electronic and Computer Engineering, Imo State Polytechnic Umuagwo, Imo State, Nigeria. ABSTRACT This paper examined solving electric power transmission line faults using hybrid artificial neural

operating as a single system and small-scale, on low-voltage distribution systems providing both power and heat. To ensure that the microgrid is operated as a single aggregated system and meets power quality, reliability and security standards, power electronic interfaces and controls need to be applied [1-2]. A microgrid should be capable work in two modes, grid-connected or islanded. The DGs are usually power electronics interfaced and in the grid-connected mode of operation, a microgrid is supported

leading technology used to reenergize electric vehicles in 30 – 60 minutes. With the ownership of EVs doubling each year, the need to implement efficient, fast charging infrastructure is progressively increasing. There are two technical approaches to establish fast charging 1. via a high power, 3-phase AC connection from an AC charging post at the charging station to an on-board high power charger in the EV or 2. via a high power DC connection from a high power DC charger at the charging station directly

sinusoidal currents containing harmonics from the supply which in turn causes voltage harmonics. Current harmonic causes increased power system losses, excessive heating in rotating machinery, interference with nearby communication circuits and control circuits, etc. It has become a vital importance to maintain the sinusoidal nature of voltage and currents in the power system. Various international agencies like IEEE and IEC have issued standards, which put limits on various current and voltage harmonics

To measure the similarity of each two successive cycles for the same electrical signal (current/voltage/power), the author proposes to apply the correlation concept [21-24]. The correlation coefficient (r) is computed between a window with a certain number of samples (m) in a signal (X) and another window with the same number of samples in the same signal but shifted from each other by a time interval of hΔt, where m is the number of samples per window, h is the number of samples between the two

time interval is considered for the three phase legs. Hence, the realization of the shoot-through state is easy, but the main drawback of this modulation method is big inductor ripple and a large inductor when the output frequency is low. In this paper, a novel Space Vector Pulse Width Modulation (SVPWM) technique to reduce the inductor current ripple

The power-down mode saves the RAM contents but freezes the oscillator disabling all other chip functions until the next hardware reset. Pin Configuration BLOCK DIAGRAM Pin Description VCC: Supply voltage. GND: Ground. Port 1 Port 1 is an 8-bit bi-Directional

frequency. Furthermore, system generation and stability are at risk as the frequency drops. This is specially the case for a thermal generation plant where power output mostly depends on motor-driven auxiliary loads, such as boiler feed water pumps, coal pulverizing, and draft fans. The drop in system frequency instigates a rapid fall of power output to the auxiliary loads, causing further reduction of the energy input to the turbine generator. This sequence of events further deteriorates the system

performance of the whole system for load balancing, the harmonic compensation, the neutral current compensation, and the power factor correction will be investigated in Section 5. 4.1 Initiatory performance Consider the input signal of the proposed AANF as: y(t)=sin⁡(ω_0 t+φ_1 )+0.2 sin⁡(5ω_0 t+φ_5 )+0.3 sin⁡(7ω_0 t+φ_7 )+0.3 sin⁡(30ω_0 t+φ_30) (21) where〖 ω〗_0=100 π rad/s and the initial phase angles φ_i’s are selected randomly between zero and 2π rad. The response of the system

Primary Cooling Water Circuit In The Generators : The treated water used for cooling of the stator winding, phase connectors and bushings is designated as primary water in order to distinguish it from the secondary coolant (raw water, condensator etc.). The primary water is circulated in a closed circuit and dissipates the absorbed heat to the secondary cooling in the primary water cooler. The pump is supplied with in primary water cooler. The pump is supplied with in the primary water tank and delivers