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Earthing Design Calculation for 380/132/11kV Substation

 
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    Earthing Design Calculation for 380/132/11kV Substation

    What you'll learn
    From Scratch , Complete Earth Design Calculations of 380/132/11kV Substation
    What Parameters are required fro Earthing design Calculations of Grid
    Step by Step Guide of each step
    Actual Substation Earth Design Calculations explained
    Requirements
    Basic Understanding
    Description
    Dear All,



    I have prepared this course based on actual design calculations for the actual 380/132/11kV Substation.

    Explained in detail topics step by Step.

    Introduction

    Collecting information of substation, total line and transformer, etc

    Collecting Network Data

    Explaining Short Circuit Level, Fault Clearance time, Thermal Time

    Collecting Data at Site for Specific Soil Resistivity

    AEMC® - Wenner Soil Resistivity Testing Explained - Using 6472

    Difference between resistivity and Resistance

    How to Calculate Thermal Design of earthing electrode and conductors

    Calculating Area for Conductor as per IEEE Std 80 2000

    Discussing Fusing temperature, Ambient temp, Material Constant, Thermal Capacity, Thermal Coefficient

    Discuss the Design Software Used for Calculations

    Introduction to SES CDEGS _ FCDIST - Getting Started

    Calculation of Grid Earth Resistance

    Standard describing Minimum Requirement of Earth Resistance

    Tolerable Touch and Step Potential

    The formula for Step & Touch Potential

    Determination of Maximum Grid Current

    Determination of Ground Potential Rise

    Design of earth grid with respect to touch and step voltages

    Single-Electrode/Touch Voltages/Worst Spherical

    Design Criteria for step & Touch Potential

    Foundation Earth Electrodes

    Indoor Earthing System

    Outdoor Earthing system

    Input to software

    The grounding system in the substation is very important. The functions of grounding systems or earth mat include:

    Ensure safety to personnel in substations against electrical shocks.

    Provide the ground connection for connecting the neutrals of stat connected transformer winding to earth ( neutral earthing ).

    Discharge the overvoltages from overhead ground wires or the lightning masts to earth. To provide a ground path for surge arresters.

    Provide a path for discharging the charge between phase and ground by means of earthing switches.

    To provide earth connections to structures and other non-current carrying metallic objects in the sub-station (equipment earthing).

    In addition to such a grid below ground level, earthing spikes (electrodes) are driven into the ground. They are connected electrically to the earth grid, equipment bodies, structures, neutrals, etc. All these are connected to the station earthing system by earthing strips.

    If the switchyards have a soil of low resistivity, the earth resistance of the earthing system would below. If the soil resistivity is high, the mesh rods are laid at closer spacing. More electrodes are inserted into the ground.

    Thanks

    Muhammad Kashif

    Who this course is for:
    Student, Engineer, Professionals


    MP4 | Video: h264, 1280x720 | Audio: AAC, 44100 Hz
    Language: English | Size: 1.38 GB | Duration: 2h 53m


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