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Webinar-Mapping Low Voltage Networks Using AMI Data - Shared screen with speaker view
C4NET
22:51
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C4NET
23:16
data@c4net.com.au
C4NET
23:51
For EV data service:https://c4net.com.au/services/ev-data-warehouse/
C4NET
28:24
We encourage you to pop your questions in the Q&A section (or this chat box)
Abhinab Chopra
34:29
have you used micro PMUs
Reza
34:59
@ Abhinab, No, we only use smart meter data
Jian Zapata
37:05
Where do we calculate the line impedance? within the smart meter?
Andrew
37:27
No, they are calculated at a central point
Reza
37:38
@ Jian, it is done centrally using the smart meter measurements from all customers in a circuit
Abhinab Chopra
38:17
Try Rate of Change of Frequency (RoCoF) methods with cheaper microPMU applied
Jian Zapata
38:22
Thanks, if I understand correctly, it is delta voltage over change in current. What is the time interval in polling V & I?
Tobie
38:22
Smart meters provided only 5 min interval data of voltage, current and power factor for every meter accros the distribution sub/transformer.
Abhinab Chopra
38:30
How do you know which phase is supplying?
Reza
39:17
We have developed a clustering algorithm to identify customer's phase
Geordie Dalzell
43:10
what pre-processing is done before applying TSNE?
Reza
43:53
We filter the voltage time series by removing outliers
JIANGXIA ZHONG
44:02
how do you calcuate the distance between two residential customers? As you don't have the real GIS toplogy as well as you don't know the cable types
Reza
44:46
We calculate 'electrical distance', from voltage sensitivity coefficients that we estimate
Andrew
45:14
"electrical distance" means impedance (or actually, resistance)
Angela Simonovska
47:19
Hi there, good presentation! Just wondering whether you use constrained or unconstrained k-means clustering for the phase grouping ?Also, the algorithm for the impedances ("the black box") is based on some AI/Machine Learning method?Thank you
Gok YILMAZ
49:55
Very good presentation. will you share the recording please?
Robert Clear
50:15
Great presentation - do your assumptions take into account reverse power flow conditions?
Andrew
50:40
@Robert, yes it works with reverse power flow.
Andrew
52:29
@Angela, we just used regular k-means. What sort of constraints did you have in mind? Also the calculating of impedances was an optimization problem. It wasn't a typical ML algorithm, but ML is basically just optimization.
Angela Simonovska
01:01:20
@Andrew, thank you for your answer.In terms of constrained k-means or not, the question is whether there is an information for some of the customer's phase groups, making it constrained. Or, no information at all for any phase group of any customer making it unconstrained.
Nando Ochoa
01:05:42
Great stuff Reza and Team! Many thanks for the preso!
Hamim Shaikh
01:08:30
Thank you for this presentation, I'm pretty new at this domain so please excuse my very naïve questions ?? have we got this models tested with the real time data ? i.e. not only applying constrained dataset in controlled environment and is the efficiency of this model better than already processes working with Distributors prod system i.e. phase detection, meter impendence, topology, fault detection, if yes, then how was the difference of effectiveness identified
C4NET
01:16:27
Thanks for joining us.We would highly appreciate your feedback, please take a moment to complete this survey.https://forms.office.com/r/q4CE9bKfn7
Hamim Shaikh
01:17:54
Thank you
Gok YILMAZ
01:17:58
Thanks for this great presentation.
C4NET
01:18:29
Yes, the recording will be available on our website soon.
Jian Zapata
01:22:34
how does the service line interfere with the accuracy of data? some conductors are very old and may have a different gauge compared to new one..