Embed Size (px)
Citation preview
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary
WHO IS BRIDGE
• Important Chart
• Long Term Archive
• Short term Archive
Data Archive Architectures
2
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary 3
Important Chart
N = N* fp ne fl fi fc fL
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary 4
Architecture
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary
1. UDP Multicast difficult to maintain on IPV4 networks
2. Bandwidth Limitations
3. Quality of Service Policies
4. Daily statistics use
5
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
6
Plot individual minute totals
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary 7
Plot individual second totals for minutes with missing data
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary 8
Another set 02/01/2017 99.971% availability missing 1529 samples
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary 9
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
10
Initial conclusions
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary
1. UDP C37.118 spontaneous
2. Bandwidth Limitations
3. PRSP Test of Gateway Exchange Protocol
4. Daily statistics use
11
Communication Issues WISP WAN
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary 12
PG&E 59 (2 phasors each) PMUs to Peak RC
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary 13
Stream to Peak RC and CAISO System Crash (58 PMUs 116 signals)
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary 14
Receive stream high bandwidth utilization
Copyright © 2017 BRIDGE Energy Group | Confidential & Proprietary 15
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
16
Suggestion
