Chopping reactive load into the circuit in this manner injects undesirable odd-order harmonics and so banks of high-power filters are usually provided to smooth the waveform.
12.
Vars may be considered as either the imaginary part of apparent power, or the power flowing into a reactive load, where voltage and current are specified in volts and amperes.
13.
This has to be achieved with varying demand, variable reactive loads, and even nonlinear loads, with electricity provided by generators and distribution and transmission equipment that are not perfectly reliable.
14.
If the power system's reactive load is capacitive ( leading ), the SVC will use thyristor controlled reactors to consume inductive ( lagging ) conditions, the capacitor banks are automatically switched in, thus providing a higher system voltage.
15.
It's also possible that an excess of " reactive load " ( basically motors as opposed to lights ) will cause the frequency to drop rather than the voltage, and again the genertor trips offline . ( The same thing also happens if the load is reduced suddenly due to some problem and the generator is delivering too much power .)
16.
Heat in reactive loads such as transformers and resistive loads such as switches increases as the square of the current passing through them, which is why when one leg of a power distribution network fails, the other legs which parallel it immediately get hotter ( if load is shifted through them from parts of the network which had been served by the failed leg ).
