What should happen if the State Estimator solution is outside the generators operating limits (i.e., greater than EcoMax or less than EcoMin), and the use of these values by the dispatch software result in DDPs that are inconsistent with the generators operating limits?
The initial conditions for each time interval for the Real-Time dispatch software that produces Desired Dispatch Points (DDPs) for generators are based on the latest Energy Management System (EMS) State Estimator solution. The EMS State Estimator solution utilizes, among other things, field telemetry as an input. Field telemetry inherently has a degree of error, and one of the reasons for using a State Estimator is that its solution minimizes these errors across the entire system. The ISO-NE’s Sate Estimator (as described in Market Rule 1 and Manual 11) is an application that has been in use successfully for a number of years. The Estimator is the primary security analysis tool that deals with the recognition of and management of transmission related system operations. In this context, the small anomalies in differences between generator telemetered data and estimated generator outputs that the State Estimator identifies has not been an issue. With the implementation of SMD and LMPs, t
