He said the fluctuation caused voltage available to the trains to drop to about 9,000 volts from the normal level of 12,000 volts.
When a problem causes voltage to drop, a lamp or a television might dim, and when the voltage rises again, the appliance returns to normal without a notable increase in power consumption.
The serious faults is the faults that will cause voltage instability.
There are 25 branches lined in red in Fig. 8 that will cause voltage instability problem.
The change in train positions and powers causes voltage variation in the power feeding system.
In microgrid, sudden startup of wind turbines may cause voltage sags.
As the renewable penetration keeps increasing, the voltage rise problem becomes greater and causes voltage regulation problems.
Since the AgPDMS caused voltage drops, they were able to select a higher voltage than in the simulation analysis.
Also, the reactive power related to the wind power collection network can cause voltage variations, which needs to be considered.
The mismatch between generated and consumed reactive power in the system causes voltage fluctuations, which will occur at generator terminals.
