feeder fragment import use case.pptx...
TRANSCRIPT
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Distribution GIS & Grid Model Data Management Project
Feeder Fragment Import Use Case
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This use case is about the red arrow.
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In NMM, we assume distribution modeling and transmission are divided into separate frames.
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This use case describes the initial population of a distribution network analysis model in an NMM function.
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There are 4 sources of information.
Network Model Management (NMM)
Transmission& Substation Engineering
Geospatial Feeder Source
Customer Meters
DER Applications to
Connect
Feeder FragmentManual Meter Fragment DER Fragment
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We assume transmission is modeled manually, and substations look like this…
Boundary
Transmission Modeling
M M
MM
Distribution Modeling
= energy connection
= measured terminal
= real power control
= reactive control
M
= connectivity node
= breaker
= transformer
= switch
= cap bank
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A GIS source has provided these feeder fragments.
= connectivity node
= switch
Duplicated open switch
= AC line section of consistent construction
= breaker
= breaker
Duplicated open switch
Feeder A
Feeder B
Feeder C
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Boundary
Transmission Modeling
M M
MM
Distribution Modeling(as viewed by transmission)
= energy connection
= measured terminal
= real power control
= reactive control
M
= connectivity node
= breaker
= transformer
= switch
= cap bank
Frag-ment
A
Let’s walk through import of feeder fragment A.
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Boundary
Transmission Modeling
M M
MMFrag-ment
A
1. Remove parts mastered by transmission
2. Connect fragment external
reference
Fragment Import NMM Model Part
The NMM user imports the fragment & makes changes as necessary to fit the fragment into existing NMM modeling.
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Boundary
Distribution Modeling
Transmission Modeling
M M
MM
= energy connection
= measured terminal
= real power control
= reactive control
M
= connectivity node
= breaker
= transformer
= switch
= cap bank
A B C
These changes are captured as an NMM fragment update project.
The end result is an NMM update that changes the distribution modeling as shown.
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When all three fragments are processed, it looks like this.
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DER descriptions come from a source that manages applications to connect. The following fragments are ready for processing…
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Let’s add fragment 1 into its location in feeder B.
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User imports fragment and connects it into the existing modeling.
Boundary
Transmission Model Part
M M
MM
Distribution Model Part
A B C
invpv
pv
batt
m
m
Fragment 1
F1
1. Helper says to ignore metering data that is mastered from
meter fragments.
Fragment Import NMM Model Part
invpv
pv
batt
F1
invpv
pv
batt
F1
2. User connects external references into the
distribution model part.
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When all DER fragments are imported, the NMM modeling looks like this.
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Meter data is assumed to come in as fragments containing regional groupings of meters. This group happens to relate to feeder B.
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Meter Fragment Boundary
Transmission Model Part
M M
MM
Distribution Model Part
A B C
invpv
pv
batt
F1pv F2
pv F3
mmmmm
m
mm
mmm
mmmm
mm
m
mm
mmmmm
m
mm
mmm
mmmm
mm
m
mm
Fragment Import NMM Model Part
1. User connects external references into
distribution model part.
The NMM user imports fragment and completes the references from meters to equipment.
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If only a few meters change, manually completing meter references is acceptable.
However, initializing millions of meter references manually will be painful.
A special assist in NMM would be helpful here.– Use the meter location and customer transformer information to locate
the corresponding customer transformer in the NMM modeling.– Identify the low side connectivity node.– Connect customer energy connection terminal to connectivity node in the
fragment.
Completing meter references.
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The complete view of feeder B is now as shown.
Boundary
= metered location
Feeder B after meter model part is added
= connectivity node
= switch= secondary transformer
= AC line section of consistent construction
= breaker
invpv
pv
battpv
= single terminal energy connection associated to a single type of energy
pv = real / reactive control
= DER facility
= DER energy component
inv = AC/DC inverter
F1
F2F3