Transcript Monitoring Equipment to Support MOD-033

MONITORING EQUIPMENT TO
SUPPORT MOD-033
WECC MVWG Meeting
Stephanie Imamovic | June 15, 2016
OVERVIEW
• Review of MOD-033 Requirements
• Brief discussion on Power Flow Model Validation
• Discussion on Dynamic Model Validation and
Dynamic Monitoring Equipment (main purpose)
• Goal: Looking for feedback and to survey what
PCs are implementing
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MOD-033-1 REQUIREMENTS
• R1 applies to PCs to validate planning base cases
(power flow and dynamics)
o Comparison at least once every 24 months
o Guidelines to determine unacceptable differences in
performance and to resolve those identified
• R2 requires RC and TOPs to provide data upon
PC’s request
• Effective July 1, 2017
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MOD-033 BACKGROUND
Background: The focus of validation in this standard is not
Interconnection-wide phenomena, but on the Planning
Coordinator’s portion of the existing system. The Reliability Standard
requires Planning Coordinators to implement a documented data
validation process for power flow and dynamics. For the dynamics
validation, the target of validation is those events that the Planning
Coordinator determines are dynamic local events.
A dynamic local event could include such things as closing a transmission line
near a generating plant. A dynamic local event is a disturbance on the power
system that produces some measurable transient response, such as oscillations.
It could involve one small area of the system or a generating plant oscillating
against the rest of the grid. The rest of the grid should not have a significant
effect. Oscillations involving large areas of the grid are not local events.
However, a dynamic local event could also be a subset of a larger disturbance
involving large areas of the grid.
Note: Bold and italics are for emphasis only.
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SYSTEM MODEL VALIDATION GUIDELINES
• WECC Guidelines – MVWG SMVTF to develop
(to describe process for developing WECC base cases for
powerflow and dynamics validation and guidance on
identifying unacceptable differences and how to resolve)
• NERC Guidelines – MWG document available:
NERC MWG Procedures for Validation of Powerflow and Dynamics Cases
• PC Guidelines – PCs are required to have a
guideline, and can reference the WECC and NERC
guidelines within their guideline
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POWER FLOW MODEL VALIDATION
• Sources of measurement data that can be used
(time synchronized snapshot to include V, MW,
MVAr, status, settings):
o EMS/State Estimator
o SCADA/PI Historian
o WSM case (from WECC EMS)
o PMU data
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DYNAMIC MODEL VALIDATION –
DEVICE SELECTION
• What equipment is being used or being installed?
o EMS/SCADA – 2-4 second sampling rate is not sufficient
o PMUs – data can be extracted, but not all entities have PMUs
o DFRs – may not be set up to record for dynamic validation, but
some can be set up with appropriate settings (also, check for
enough data storage)
o SEL Relays – may not be on all equipment, and if available, may not
be set up to record for dynamic validation (some can be set up with
appropriate settings; also, check for enough data storage)
o Power Quality Meters – could these work? Are they time
synchronized, have appropriate settings, and have enough storage?
o Various devices with data logging capability at generating facilities
– could these work? Are they time synchronized, have appropriate
settings, and have enough storage?
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DYNAMIC MODEL VALIDATION –
DEVICE SETTINGS
• Measured signals (must be time synchronized):
o Va, Vb, Vc and Ia, Ib, Ic
• Sources of measurement data (looking for
positive sequence data of V, MW, MVAr, freq):
o PMUs – existing settings okay
• 30-60 samples/second, continuous recordings
o WSM case (data from PMUs and other devices) –
the chosen disturbance may or may not be
appropriate for each PC (note: each PC would still
need monitoring equipment on their system)
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DYNAMIC MODEL VALIDATION –
DEVICE SETTINGS (CONTINUED)
• Sources of measurement data (continued):
o DFRs / SEL relays / PQ meters – what are appropriate
settings?
• Trigger points:
o Voltage < 0.9 pu (note: may be in reference to either normal
operating voltage (e.g. 117 kV) or nominal voltage (e.g. 115 kV),
depending on what makes sense for your system)
o Voltage change +/- 5%
o Frequency < 59.9 Hz or > 60.1 Hz
• Sampling rate of data in output file – 30-60 samples/second
(input sampling rate is typically in kHz)
• Length of record – 10 seconds pre-event and 60 seconds postevent
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DYNAMIC MODEL VALIDATION –
DEVICE LOCATIONS
• Where should monitoring equipment be placed?
What methods are entities using to determine
how many and where?
o At or near generation facilities
o At major transmission facilities
o At major load centers
o At major interconnection points
o BES buses with reactive power devices
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DYNAMIC MODEL VALIDATION –
DEVICES FROM OTHER STANDARDS
• What devices from other standards can be
leveraged for MOD-033?
o PRC-002 Requirements (SERs, FRs, DDRs)
• Sequence of Event Recorders (SERs) and Fault Recorders
(FRs) do not provide sufficient data for MOD-033 needs
(buses identified by Attachment 1 analysis may not be enough and the
implementation plan has a different timeline)
• Dynamic Data Recorders (DDRs) appear to be sufficient
(continuous recording and storage), if installed (fewer DDRs
are required than SERs and FRs)
o MOD-026 & MOD-027 Generator Verification
• If monitoring equipment is installed, may also be used for
MOD-033 needs
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ADDITIONAL DISCUSSION
Other thoughts?
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