Contingency Analysis in Power System : In the past many widespread blackouts have occurred in interconnected power systems. Therefore, it is necessary to ensure that power systems should be operated most economically such that power is delivered reliably. Reliable operation implies that there is adequate power generation and the same can be transmitted reliably to the loads. Most power systems are designed with enough redundancy so that they can withstand …
Introduction to Power System Analysis : In earlier article we have been primarily concerned with the economical operation of a power system. An equally important factor in the operation of a Introduction to Power System Analysis is the desire to maintain system security. System security involves practices suitably designed to keep the system operating when components fail. Besides economizing on fuel cost and minimizing emission of gases (CO, CO2, NOx, …
Power System Security Analysis : Power System Security Analysis can be broken down into two major functions that are carried out in an operations control centre: Security assessment, and Security control. The former gives the security level of the system operating state. The latter determines the appropriate security constrained scheduling required to optimally attain the target security level. The security functions in an EMS can be executed in ‘real time’ and ‘study’ …
Sensitivity Factor in Power System : A security analysis program is run in a load dispatch centre very quickly to help the operators. This can be attempted by carrying out an approximate analysis and using a computer system having multiple processors or vector processors for speedy analysis. The system may be adequately described and an equivalent should be used for neighbours connected through tie-lines. We can eliminate all non-violation cases …
System State Classification : A formal System State Classification of power system security levels was first suggested by DyLiacco and further clarified by Fink and Carlsen in order to define relevant EMS (Energy Management System) functions. Stott et. al have also presented a more practical static security level diagram (see Fig. 13.1) by incorporating correctively secure (Level 2) and correctable emergency (Level 4) security levels. In the Fig. 13.1, arrowed lines …
Voltage Stability in Power System : Voltage (load) stability, however, is now a main issue in planning and operating electric power systems and is a factor leading to limit power transfers. Voltage Stability in Power System is concerned with the ability of a power system to maintain acceptable voltages at all buses in the system under normal conditions and after being subjected to a disturbance. A Voltage Stability in Power …
