Loss Minimization of Power Distribution Network using Different Types of Distributed Generation Unit

A Radial Distribution network is important in power system area because of its simple design and reduced cost. Reduction of system losses and improvement of voltage profile is one of the key aspects in power system operation. Distributed generators are beneficial in reducing losses effectively in distribution systems as compared to other methods of loss reduction. Sizing and location of DG sources places an important role in reducing losses in distribution network. Four types of DG are considered in this paper with one DG installed for minimize the total real and reactive power losses. The objective of this methodology is to calculate size and to identify the corresponding optimum location for DG placement for minimizing the total real and reactive power losses and to improve voltage profile   in primary distribution system. It can obtain maximum loss reduction for each of four types of optimally placed DGs. Optimal sizing of Distributed Generation can be calculated using exact loss formula and an efficient approach is used to determine the optimum location for Distributed Generation Placement.  To demonstrate the performance of the proposed approach 36-bus radial distribution system in Belin Substation in Myanmar was tested and validated with different sizes and the result was discussed

Comparison of TCSC and STATCOM for Damping Power System Oscillations

Power system oscillation damping remains as one of the major concerns for secure and reliable operation of power systems. Power system oscillations occur due to the lack of damping torque at the generators’ rotors. The oscillation of the generators’ rotors causes the oscillation of other power system variables such as bus voltage. Flexible ac transmission systems (FACTS) devices with a suitable control strategy have the potential to increase the system stability margin. The damping problem is analyzed based on eigenvalue analysis and time-domain simulation. Case studies have been demonstrated on Myanmar National Grid using Power System Analysis Toolbox (PSAT). The oscillation damping by installing FACTS devices such as TCSC and STATCOM are studied in this paper and performance analysis of TCSC and STATCOM are compared in voltage supporting and power system oscillation damping

Study and Analysis of Machine Parameters Effect on Power System Stability

The stability study of a power system is an important factor in the planning or increasing of facilities. The studies are helpful in determining such thing as nature of the relaying system needed, critical clearing time of circuit breakers, voltage level, and transfer capability between systems. In this paper, the effects of machine parameters (inertia constant, damping constant and transient reactance) on the critical clearing time of the power system stability have been analyzed. These parameters are the main contribution to the angular acceleration and power transfer capability that affected the power system stability. The analysis has been done for two types of power system: single machine infinite bus system and multi-machine system. From the analysis, it is found that the stability of the system is affected by studied parameters and important in the design of the improving power system stability and protection system