davidbeach,
What would be the most appropriate method to allocate the line and transformer losses back down the line to the difference sources?
Proportion of I^2s for both KW and KVAR losses?
Proportion of KW^2s value for KW Losses?
Proportion of KVAR^2 values for KVAR Losses?
Function of KVA...
Bacon4life, (BTW nice handle [bigsmile])
Thank you for your reply. I have replied to your comments and question below. With that said, do you have thoughts/suggestions on allocation methods for KW and KVAR losses using combinations of Current, KVA, PF, KW and KVAR from each meter?
The...
I am looking for ideas to have a relatively inexpensive and simple hardware device that can be sent to the field to test an Ethernet port for proper TCP port connection rights.
Application is to pre-test and verify router, switch and firewall rules have been properly setup for a device, with...
Looking for advice and recommendations on properly allocating KW and KVAR losses across multiple transformers sharing a transmission line and then further allocate each transformer line loss share to its related resources/feeders under each transformer.
Assumptions -
1. Three transformers...
I’ve watch several Two-Wattmeter Method videos, including this series (3 parts starting with this one) and I have some questions to take the topic a bit farther and to better understand the vectors, specifically when CTs and PTs are in the mix. Furthermore, my confusion and frustration relates...
I used to use an HP41C calculator years ago. I am now studying to take PE and dusting off my RPN skills with a HP35S (NCEES approved). Can anyone tell me the pros/cons of using equations versus programs; when best to use either method? Also, does anyone have a good resource of POWER equations...
argotier or others with knowledge,
Additional follow-up questions. Thanks in advance for your time.
Based on calculations in previous posts and summarized here:
- Current with 2.0 MVA, 1 Ω NGR = 8000 V / (22.9 Ω / 4 / 3 + 1 Ω) = 2750 A = ~2.8kA
- Current with 4 x 0.5 MVA banks, with 4 Ω...
argotier, Thank you for your time on this. A few follow up questions.
1. Based on the calculated parameters of the resistors (1Ω @ ~2.8kA-10s & 4Ω @ ~700A-10s), what experience do you have with similar sized resistors being implemented GTs for such projects? Wondering what is economically...
Need help with help with NGR rating for Option#1 re: EPRI Technical Brief_Effective Grounding and Inverter-Based Generation. How to properly calculate current through NGR when connected to neutral of Wye winding of Wye-g/delta(not a zig-zag) grounding transformer. What is valid impedance model...
I have a wind farm generation & tie-meter design where the meter location is at a wind farm and the point-of delivery for LBA and PPA settlements is several miles down a radial 345kV transmission line (at bus of transco). A few loss compensation questions have come up. Line loss only, no...
Scottf,
I am working on anglicizing that data; unfortunately the existing legacy meter installation does not provide real-time SCADA Amps or MW values (the MW are read by separate transducer, also 2-element) values. I have only done a snap shot of relay amps & MW at the same time as meter...
stevenal, Thanks for the response. While I agree with you about not needing the aux PTs, I am still trying to get two (2) internal parties to concur with this assessment. I wish I were more effective at overlaying the vectors on this diagram to prove the point.
Regarding the CTs and...
stevenal,
Sorry for the bad link. Attached is another try as a JPEG. Hopefully it works this time.
Again, just for simplicity of diagram, the two (2) metering CTs are not shown but they are on 161kV Phase A & C...
