Participant Technical Reference Manual - IESO

3.Dispatch Information
IMO_MAN_0024
3.2 Dispatch Message Exchange
3.2.1 Overview
195 Market participants using a dispatch workstation will be integrating directly
with the EMS systems at the IESO and will require interaction with the
Message Exchange system. Market participants that require this module will be
receiving the client software from the IESO via the network and will be
instructed on its installation and application.
196 Message Exchange information will be stored in the IESO Operations Database
(ODB), for use by the Compliance Monitor. This verifies that the requested
dispatch actually takes place based on the measurement availability.
197 The market participant will:
acknowledge receipt of the message;
accept or refuse the dispatch request; and
perform the requested control action.
198 The Message Exchange function is used by the IESO to send dispatch
instructions to the market participants. This function is triggered by the
dispatch request of an application (such as energy dispatch) to issue a message
either automatically by Inter-Control Center Communications Protocol (ICCP)
or by WEB-based Message Exchange or manually (off-line by telephone or fax)
by the Exchange Coordinator to a market participant.
199 The Message Exchange function sends dispatch instruction to the IESO market
participants using ABB‟s ICCP Block 4 capabilities or the WEB-based
Message Exchange facilities.
200 In order to interface with the Message Exchange using ICCP the market
participants must also have ICCP Block 4 configured on their dispatch
workstations and have specialized software to interpret and manage the ICCP
block 4 messages.
201 WEB-based Message Exchange is an alternative facility made available to the
IESO market participants that can be use to support the Message Exchange
requirements. The WEB-based Message Exchange adds additional capability to
the existing Message Exchange functionality. WEB-Based Message Exchange
permits dispatch instructions to be sent to the market participants using
browser compatible user interface and application programming interface.
These interfaces will be included with the delivery of this product. WEB-Based
Message Exchange will be simpler to deploy than the ICCP-based Message
Exchange and more cost effective for the market participants, however this
may be a less reliable approach.
58 Public Issue 21.1 – March 15, 2010 - estimated