gar
Senior Member
- Location
- Ann Arbor, Michigan
- Occupation
- EE
190615-2216 EDT
Consider the general concept of a voltage regulator.
This a device that in some way can adjust its output voltage based upon the measured output voltage at some output point. This can and usually is local at the regulator output terminals. But there are many DC regulators with remote sense capability. This means one can do the regulation operation such that the voltage at the remote location is what is regulated.
To a large extent within some limited range this means that the apparent source impedance of the regulator is much lower than the source impedance of the power input to the regulator.
Suppose you had a DC regulator that could hold output within 10 mV with a load change of 1 A, then the apparent small signal regulator output impedance is Z = 0.01/1 = 0.01 ohm. For some applications this could be approximated as zero source impedance.
Next consider a substation with voltage regulation. From the substation to users there is line and transformer impedance. A power consuming load will lower the voltage at the load point.
Next consider power generators as the load, solar panels. This means there is a rise in voltage from those generators near the generators. This rise will be greater than the drop from other loads when demand from power consumers is lower than power from the generators. Likely with a lot of solar some time after sun rise. So voltage away from the substation at the load end may go above the regulated value at the substation.
.
Consider the general concept of a voltage regulator.
This a device that in some way can adjust its output voltage based upon the measured output voltage at some output point. This can and usually is local at the regulator output terminals. But there are many DC regulators with remote sense capability. This means one can do the regulation operation such that the voltage at the remote location is what is regulated.
To a large extent within some limited range this means that the apparent source impedance of the regulator is much lower than the source impedance of the power input to the regulator.
Suppose you had a DC regulator that could hold output within 10 mV with a load change of 1 A, then the apparent small signal regulator output impedance is Z = 0.01/1 = 0.01 ohm. For some applications this could be approximated as zero source impedance.
Next consider a substation with voltage regulation. From the substation to users there is line and transformer impedance. A power consuming load will lower the voltage at the load point.
Next consider power generators as the load, solar panels. This means there is a rise in voltage from those generators near the generators. This rise will be greater than the drop from other loads when demand from power consumers is lower than power from the generators. Likely with a lot of solar some time after sun rise. So voltage away from the substation at the load end may go above the regulated value at the substation.
.
