Power System

equation to loop 1 of Fig. 2 and current balance equation to node 1, the state space equations (1) and (2)

2. Equal load sharing such as the real and reactive power, the load harmonic current among the parallel connected inverters.

KVL, KCL and Ohm's Law are all important tools for circuit analysis, especially using the node voltage method. A worked example for KCL and Ohm's law is included for Figure 1 next; which can also be directly applied to that of KVL in the same manner in place of KCL.

The parameters in Figure are corrected by adding suffix “1,” indicating Feeder1, and the parameters in Fig.3.7 are corrected by adding suffix “2,” indicating Feeder2. As shown in Figs.3.6 and 3.7, load voltages in both feeders are kept constant at Uo regardless of bus voltages variation, and the load currents in both feeders are assumed to be constant at their rated values (i.e., Io1 and Io2, respectively).

The flexible AC transmission system (FACTS) concepts, based on applying state-of-the-art power electronic technology to existing AC transmission system, improve stability to achieve power transmission close to its thermal limit [4]. Such devices are installed by utilities and by many private entities in India. In order to achieve this identical goal other way is by converting existing 400kV / 765 kV double circuit HVAC line to HVDC line without any modifications in the existing tower structure, insulators and conductors considering heavy pollution as the worst case.

The penetration level of distributed generators is increased due to the restructuring in electric power system.

D. Phase “a” Current & Voltage & DC-side Voltage Plots for 00 ≤ α ≤ 1800 The following figures from Fig. 1 till Fig. 19 display the corresponding plots for AC Phase “a” voltage and current as well as the DC side voltage:

1 Department of Electrical /Electronic Engineering, Chukwuemeka Odumegwu Ojukwu University (COOU), Uli, Anambra State, Nigeria

The system which assigned to be solved by Newton-Raphson and Decoupled Newton-Raphson methods includes two-bus. Bus.1 is slack bus where voltage is given and bus.2 is a PQ bus where load power is given. The impedance of the transmission system between bus.1 and bus.2 is given. To calculate the power flow

Abstract— The purpose of this paper is to analyse the impact of three different Flexible Alternating Current Transmission System (FACTS) devices on a power system and to analyse their capabilities with respect to various disturbances. FACTS devices discussed in this paper are Static Var Compensator (SVC), Thyristor Controlled Series Capacitor (TCSC) and Unified Power Flow Controller (UPFC). The impact on power-flow and Power Oscillation Damping due to these devices is analysed in detail. Simulations based on different choices of Power Oscillation Damping (POD) signal are simulated for small and large disturbance incurred on the system. Effect of Linear (residue method) and Non-linear (CLF) based POD signals on the system is shown in the paper. Impact of each device is considered separately followed by a comparative study between them. All simulations are done with the help of SIMPOW© and all figures are plotted in MATLAB©.

A power station consists of several generating stations and transmissions and distribution networks interconnect consumers. The purpose of any power system is to generate electrical energy in sufficient quantities at the best-suited locations, to transmit it to various load centres and then distribute to various consumers and to maintain the quality and reliability of transmission at an economic price.

Now a days, the measurement of power quality components and electrical protection are becoming more complex and costly also. As

The scope of this project is to Designed and constructs a prototype that can be used in powering any electrical appliance that required mains voltage from 220v to 240v. The project is limited to a 500VA power inverter, how it work, and its applications. The inverter will incorporate a battery charger an automatic change over that will enable auto back up within 1ms on the event or occurrence of power cut.

Department of Electrical, Electronic and Systems Engineering Universiti Kebangsaan Malaysia 43600 UKM, Bangi, Selangor, Malaysia email: mamun.reaz@gmail.com

We are thankful to Dr. C.D. Kotwal Head of electrical engineering for his full flagged encouragement during this study. We would like to thank our project guide Prof. Mulav Rathod and the faculties of electrical department.