Question

Assignment Description @ (Case studies & Basic calculation) Note: 3 to 4 students in a group only. The generation, delivery, and utilization of electric power and energy remain one of the most challenging and exciting fields of electrical engineering. The astounding technological developments of our age are highly dependent upon a safe, reliable, and economic supply of electric power. Describe your understanding on comprehensive coverage of the generation, transformation, transmission, distribution, and utilization of electric power. The important criteria's in the report are: a. Introduction of power grid system b. Generation - Power plant concept Type of power generation Boiler-Turbine-Generator concept Technical aspects (P, Q, S, PF, frequency, voltage & current) c. Transmission - Transmission lines concept (conductor, insulator etc.) - Type of transmission lines - Technical aspects (C, L, GMR, GMD etc.) d. Distribution - Distribution system concept - Technical aspects (P, PF, voltage & current) e. Power grid system - Load flow studies - Overall power grid system

solve part D,E,F

Answer 1

Distribution system concept and Technical aspects-

the distribution concept involves the distribution of electrical power which coming from the generating stations. The voltage from generating stations breaks into different level of voltages. The different types of conductor strands with different ratings are present to handle different types of voltage level. The power level and voltage level can be changed by using the step up and step down transformer. The power factor is also one of the important factor. The direction of power flow is decided by the leading and lagging power factor at two terminals.

Load flow studies and overall power grid-

The load flow studies has been done by the electrical engineer to plan and design power plant with respect of future expansion. The power and voltage level is the two primary information we get initially. The power system network is very complex, to have better compilation, we have to use some software to look out the real condition of power plant. And to calculate the active and reactive power flowing in the system.

The overall power grid involves the generating station, the switchgear protection system, the distributin part and the load area. To have the smooth orking of the system, every part should be in continuous analysis.

Utilitu frequency-

some country uses 50Hz and other used 60Hz frequency as their working frequency. But due to change in demand or changing in load condition the operating frequency may fluctuate. This fluctuations should be in limit otherwise, the whole grid system may fail. The load shedding is a condition when some of the loads are removed to prevent the failure of entire electrical system. This may take place due to the fluctuation in loading.