Voltage is regulated with capacitors, reactors and tap changers.
Voltage is controlled with generator AVRs, shunt reactors and capacitors, SVCs, STATCOMs, OLTC transformers. Reactive power cannot travel far, so it is supplied locally. Voltage collapse arises when reactive reserves are exhausted.
Switching in capacitor banks lifts feeder voltage at peak load.
Voltage control keeps customers' voltages within limits and prevents damage to equipment, so it is part of every grid operation plan.
Voltage is regulated with capacitors, reactors and tap changers.
Voltage control keeps customers' voltages within limits and prevents damage to equipment, so it is part of every grid operation plan.
Voltage drop along a line depends strongly on reactive power, so supplying reactive power locally raises the voltage at that point.
A device that changes the transformer turns ratio in steps, which adjusts the secondary voltage under load or off load.
Typical applications include switching capacitor banks to hold voltage during peak demand, setting tap changers on a transformer to keep the feeder voltage in range and using reactors to limit overvoltage on a lightly loaded line.
Study "Frequency control" first (topic 77 of 106 in Electrical Engineering). It covers the groundwork this topic builds on.
Q-V curves. Static var compensators. Ferranti rise at light load.
Switching in capacitor banks lifts feeder voltage at peak load.
The next topic is "HVDC transmission", which builds directly on this one.
It is classed as Advanced in Electrical Engineering (topic 78 of 106). It is an advanced topic. It assumes you are comfortable with the intermediate topics in Electrical Engineering.
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