Participant Technical Reference Manual - IESO

Participant Technical Reference Manual
4. Operational Metering Equipment & AGC
272 The IESO may add qualified devices from other manufacturers. Market
participants should contact the IESO to get information on the current set of
qualified devices.
273 If the market participant wishes to use more than one meter at a location for the
transmission of real-time data to the IESO, the IESO requires that the data be
combined to one data concentrator such as an RTU so that only one
telecommunications connection is required. The data from a failed meter or
device must show the Offline and Communication Lost Flags.
274 If ICCP (Inter Control Center Protocol) is used for real-time data transfer to the
IESO, the market participants will provide their own ICCP server and software.
Co-ordination with the IESO is necessary to establish the communication link
between the market participant and the IESO Control Centers.
275 The overall requirements for reliability and performance of the monitoring and
control equipment are specified in Chapter 4 of the “Market Rules”.
4.1.3 Field Instrumentation Standards
276 The field instrumentation standard focuses on overall accuracy of the
measurements being reported to the IESO. The accuracy requirement is for an
overall end-to-end measurement error no greater than two percent of full scale.
277 This measurement error is the sum of all the errors in the measurement chain.
Typically the measurement chain is comprised of:
a. primary conversion by potential and/or current transformers;
b. secondary conversion by transducers; and
c. report by the RTU.
278 Any load meter reading must accurately reflect the quantity being measured
regardless of load balance across the phases. For generation, a minimum of 2
metering elements is required.
Issue 21.1 – March 15, 2010 - estimated Public 71