On overhead distribution primaries, which of the following is responsible for the most voltage drop?
On overhead distribution secondaries, which of the following is responsible for the most voltage drop?
Mark any of the following that are ANSI C84 Range-A voltage violations.
Conservation voltage reduction provides the most energy savings in which season?
Conservation voltage reduction provides energy savings for which of the following? Mark all that apply.
Conservation voltage reduction has most energy savings on which type of device?
Which capacitor control should you avoid with conservation voltage reduction?
Which line-drop compensation settings method works best with large switched capacitors downstream?
For two regulators in series, which of the following do we want?
For a voltage regulator in the following scenario, find the controlled voltage from the regulator on a 120-V base.
Using the voltage-spread compensation method, find R and X settings for line drop compensation for the following situation:
Repeat using the zero reactance method.
Consider a circuit with a line X/R ratio = 2 and a load power factor = 0.8. For a load with a CVRf_{watts} = 0.9 and a CVRf_{vars} = 4.0, find the following for a 3% reduction in voltage at the load:
Repeat all of the above assuming 50% constant-power load and 50% constant-impedance load.
Consider a 12.5-kV express circuit that is four miles long with 350-kcmil AAC construction with Z_{1} = 0.0557 + j 0.1242 ohms/kfeet.
Using the IEEE 8500-node test case in OpenDSS, plot the voltage drop profile (voltage along the line as a function of distance from the substation). Flatten the voltage profile using the following methods:
Evaluate all options at peak load and 40% load. Make a table of the lowest voltage on the primary for each option.
Implement a voltage reduction algorithm on the base case. Try two different approaches to controlling voltage:
Add voltage feedback to each voltage regulator and LTC control to keep the most remote primary voltage at 119 V.
Use line-drop compensation on each voltage regulator and LTC control to try to keep the most remote primary voltage at 119 V.
Run an annual hourly (8760 hours) simulation. Use a voltage-dependent load with CVR-watts = 0.6 and CVR-vars = 3.0. Find the average consumption, line losses, and transformer load and no-load losses. Repeat for each of the flattening options identified above.
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