K-Electric Field Experience · 11 kV Distribution
From 2016 to 2018 I worked as an Assistant Engineer and Electrical Supervisor on the K-Electric network in Karachi, with MM Associates Pvt. Ltd.: three phase testing, load distribution and phase balancing across pole mounted transformers, underground cable fault location, and feeder tripping normalization and service restoration on the 11 kV network. This project rebuilds that kind of network as a live 3D digital twin beside a working SCADA single line diagram. Operate the breakers yourself, or run the cable fault drill and bring every customer back by load transfer.
Power reaches a Karachi neighbourhood in four stages. Each one is modelled in the 3D scene below, with the ratings typical of an urban 11 kV network.
A 132 kV line feeds two 40 MVA transformers, each on its own 11 kV bus section, joined by a bus coupler and six feeder breakers.
11 kV network operationsFeeder F1 on concrete poles with pole mounted transformers, a 400 V LT line and service drops to homes spread across three phases.
Three phase testing, load distribution, phase balancingFeeder F2 as an 11 kV cable to a four way ring main unit, a compact substation for apartments and a market, and a ring onward to RMU 2 to 6.
Underground cable fault locationRemote breakers and RMU switches, field operated tie points, alarms and an event log, with interlocks that stop two supplies being paralleled.
Feeder tripping normalization, service restorationDrag to orbit the model, pick a camera view, and click any object to inspect it. On the SCADA single line, select a breaker or switch, preview the result, then execute it. Start the fault drill to follow the switching schedule, or try your own order and watch the protection respond.
Representative network drawn from my field experience. Loads, ratings and switching times are typical values for an urban 11 kV network, not K-Electric records.
An earth fault on cable C1 trips feeder F2. The fault passage indicator at RMU-1 did not operate, so the fault lies between the grid station and RMU-1. The switching schedule isolates the cable and splits the ring across two feeders, because neither neighbour can carry all of F2 alone.
The control room is one part of a larger studio I built in Python. The full studio opens in its own page and runs entirely in the browser.
Python computes the engineering results and 32 unit tests check them against hand calculations. The 3D renderer is plain WebGL written for this project, with no libraries.