MAY 2017 WECC JSIS Communications and Data Archive Dan Brancaccio BRIDGE Energy Group [email protected]
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Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary
WHO IS BRIDGE
• Important Chart
• Long Term Archive
• Short term Archive
Data Archive Architectures
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Important Chart
N = N* fp ne fl fi fc fL
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Architecture
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1. UDP Multicast difficult to maintain on IPV4 networks
2. Bandwidth Limitations
3. Quality of Service Policies
4. Daily statistics use
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Communication Issues Substation to Control Center
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary
A review of the data collected during 4 days where the availability statistics were less than 100%. During this period the worst availability was 99.86% which is well above average industry wide availability stats. Stats are determined by PDQTracker (GPA). Use openHistorian (GPA) to export a CSV file for one day. Created a small .NET Application to compile stats from the exported file
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Plot individual minute totals
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Plot individual second totals for minutes with missing data
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Another set 02/01/2017 99.971% availability missing 1529 samples
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Another set 02/01/2017 99.971% availability missing 1529 samples the seconds plot
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary
1. Typically, there are two types of data dropouts associated with streaming synchrophasor data. Intermittent data frame dropouts resulting from random packet losses which cause a C37.118 data frame failure, or short time period blackouts where a number of data frames do not reach the destination. These short duration data dropouts can be seconds long and are usually associated with TCP/IP data streams where multiple retransmission requests cause problems with network appliances.
2. QOS policy adjustments have improved some issues3. Network engineers will be installing LiveAction™ network
performance monitoring tool to assist in issue resolution
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Initial conclusions
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1. UDP C37.118 spontaneous
2. Bandwidth Limitations
3. PRSP Test of Gateway Exchange Protocol
4. Daily statistics use
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Communication Issues WISP WAN
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PG&E 59 (2 phasors each) PMUs to Peak RC
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Stream to Peak RC and CAISO System Crash (58 PMUs 116 signals)
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Receive stream high bandwidth utilization
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BPA getting full value from the WISP WAN
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary
1. At this time everyone using the WISP WAN is transferring synchrophasor data using C37.118-2005 data frame format. Using Polar Coordinates and single precision floating point numbers for phasors, frequency, ROCOF. Switching to 16-bit signed integer values would immediately cut all bandwidth utilization in half
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