Frontiers of Synchrophasor Solutions Deployment · Confidential. Not to be copied, distributed, or...

Confidential. Not to be copied, distributed, or reproduced without prior approval.

Frontiers of Synchrophasor Solutions Deployment

March 30, 2017

Vijay Sukhavasi , Manu Parashar, Anil Jampala

Confidential. Not to be copied, distributed, or reproduced without prior

approval.

Key Needs

March 30, 2017Presentation Title 2

With over 40 WAMS solutions deployed worldwide, there are some

common needs identified for the next-generation WAMS:

Data Quality: Ability to detect and repair corrupt data or data gaps.

Operator Guidance: Need to provide corrective actions on synchrophasor-based

monitoring.

Operator Training: Need for a training environment to familiarize operators/dispatchers on

synchrophasor apps.

Engineering Applications: Provide offline analysis tools for operating engineers and

planners, to effectively support real-time operations.

Scalability: Next-gen architectures will need to handle 1000s PMUs (e.g. URTDSM, India

& ONS, Brazil)

Extensibility: Need to support new, not yet thought of applications as well as 3rd party

apps.


approval.

Data Quality

March 30, 2017Dynamic DTS 3


approval.

WAMS System Architecture at PG&E

Courtesy: Vahid Madani, PG&EArchitecture Supports both Redundant and Duplicate Data

End-to-end redundant architecture

to minimize data loss:

Redundant PMUs, PDCs

Duplicate data streams.

HA ‘Active-Active’ WAMS App

Servers.

EMS Redundancy.


approval.

• Benefits

• Back up to existing EMS SE (provides an alternate layer of visibility).

• PMU data validation (detect bad data) including topology errors.

• Correct for problematic CT and PT errors.

• Concepts

• State estimator driven purely with PMUs (i.e. “state measurement”).

• Operates at the sub-second cycle (tracking the PMU data).

0

5

10

15

20

25

30

35

40

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

Voltage Angle

Voltage Angle Estimated

30 degree bias

PMU-based State Estimation (Linear State Estimator)

LSE can detect and correct for PMU data errors.


approval.

Study LSE : Measurement Data Cleansing

Raw voltage angle

measurement with 10

(deg) bias

Correctly estimated

voltage angle by LSE


approval.

Operator Guidance


Angle-based Grid Management

Real-time applications for the Control Room


approval.

Dynamic/Static

Limit (DSA Tools)

Correct (NETSENS)

Predict (LODF)

Angle-based Grid ManagementHolistic Approach to Angle-based Grid Management

Angle Monitoring

Transforming WAMS angle-based MONITORING into OPERATOR GUIDANCE

Observe ● Analyze ● Predict ● Correct

KEY BENEFITS

- Independent of State Estimation function (measurement & topology based approach).

- Capable of making recommendations for corrective control actions.

δ


approval.

10

CONCEPT USED

- Topology-based Network Sensitivities (similar to LODF)

Realtime Post-CTG Angle Difference Prediction for a Source-Sink

Pair based on present PMU measurements & TopologyPost-CTG Angle Difference &

Post-CTG % Loading

Angle Limits Dynamically

Updated based on DSA-VSAT


approval.

11

Realtime Post-CTG Angle Difference Correction for a Source-Sink

Pair based on present PMU measurements & Topology

CONCEPT USED

- Topology-based Network Sensitivities (similar to LODF)

Post-CTG Angle Difference

Control Sensitivities (Relative)

Enhanced Blackstart & Restoration Management

Real-time applications for the Control Room


approval.

13

Realtime Detection & Identification of the Location of Islanding

Events

KEY BENEFIT

- Gives a good visibility to the operator in identifying the cause of island formation

Cause & Location of

Islanding Event


approval.

14

Realtime Monitoring of the Interfaces of each Island & the

Conditions needed for Resynchronization

KEY BENEFIT

- Gives a good visibility to the operator regarding the paths available for merging islands

Interface (Synchronization

Path) between Two Islands

Conditions for Island

Resynchronization


approval.

15

Realtime Detection & Identification of the Location of Island

Resynchronization Events

KEY BENEFIT

- Gives a good visibility to the operator in identifying the restoration action taken

Cause & Location of

Island Resynchronization


approval.

Hybrid (WAMS & EMS) Training Simulator


Integration of Dispatcher Training Simulator (DTS) and a Transient Simulation Engine (PowerTech TSAT).

EMS Platform

Integrated Dispatcher Training System:

• Real-time simulator based on Powertech TSAT

• Simulated data is fed directly into PP as C37.118 streams

• Data is also downsampledand sent to the EMS & DSA Tools

• EMS integrated with PhasorPoint and DSA tools

PhasorPoint

Training Server

DSA tools

Central PDC

Application

Services

Data Services

Load Flow Simulation

Dispatch Control ETV Engine

Dynamic

Grid Simulator

Control Room

Training Environment

Operator in Training

Downsampling

alarms

Simulated

C37.118 Data

Powertech TSAT

Environment

Shaping the next-generation DTS/OTS


approval.

Example: Islanding Condition Scenario using DDTS


Admin DTS Controls (Breaker Opening) Operator Visualization


approval.

Engineering Applications



approval.

Post-Event Analysis: Overview of May 30, 2013 Event (courtesy PG&E)

19

2000MW

Gen drop

DC

Intertie

DC Intertie

restarted

Series

Capacitors

bypassed

Shunt

Capacitors

removed

Frequency

recovered

Series and Shunt

Capacitors

inserted


approval.

• MODEL VALIDATION

−Power Plant Model Validation

−NERC Compliance (MOD 26, 27)

courtesy: BPA

Dynamic Model Validation – Forced Simulation

MEASUREMEN

T

Simulation

VERIFICATIONComparing measured and simulated results

Oscillations (FRQ, DAMP, MODE SHAPE, SOURCES)

Phasor Measurements

CALIBRATIONTuning generator dynamic model parameters


approval.

Power Plant Model Validation & Calibration

Simulation Reconstruction

PMU Observation


approval.

22

COMPLIANCE Monitoring: BAL003 Frequency Response(May 30th 2013 PDCI Event Analysis)

Min Frequency: 59.70Hz

Estimated Beta: 1230.53 MW/0.1HzCourtesy Vahid Madani, PG&E


approval.

Scalability and Extensibility



approval.

Central vs. Distributed Architecture

PDC

PMU PMU PMU

RT/OL Apps Server

TO/TSO #N

Ground WAMS - CENTRAL Predix Cloud WAMS - DISTRIBUTED

PDC

PMU PMU PMU PDC

PMU PMU

RT/OL Apps Server

PDC

Transm Owner / System

Operator

Support

PDC

Other

TO/TSO

DNO

Vendor

Central PDC

PMU PMU PMU

RT Apps Server

TO/TSO #1

PDC

PMU

DNO #M

PMU

PMU

PDC

PMU PMU

Industrial &

DG

Authorised

user

PDC

PMU

DNO #1

PMU

PMU

Data Analytics Visualisation


approval.

Modular & Distributed WAMS Infrastructure

Distributed Architecture

Distributed WAMS

Infrastructure Phasor Data Concentrator

Application Server

Historian

Storage


approval.

WAMS Cloud-based Visualization


Frontiers of Synchrophasor Solutions Deployment · Confidential. Not to be copied, distributed, or...

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