Real-Time Reliability Model

A.k.a. EMS model. A computer representation of the power system facilities.

Relevante items: Security Constrained Economic Dispatch

Real-Time Reliability Model by PJM (p17, Revision 67)

PJM’s Real-Time Reliability Model is a computer representation of the power system facilities in the PJM RTO and other Balancing Authorities that may impact the reliable operation of the PJM system. The model resides and is maintained by the PJM staff on the PJM Energy Management System (EMS).

Real-Time Reliability Model by PJM (p12, Revision 25) PJM’s Real-Time Reliability Model, also known as the EMS model, is a computer representation of the power system facilities in the PJM RTO and other Control Areas that may impact the reliable operation of the PJM system. The model, maintained by designated PJM support staff, resides on the PJM EMS. The PJM EMS Transmission Network Application (TNA) programs utilize the model to:

• Calculate the real-time state of the electric system (using a State Estimator (SE)) and
• Assess if the PJM system is operating within relevant, established limits.

The EMS model is adapted for use in the real-time Locational Marginal Price calculator (LMP - see Section 5 of this manual, Data Interfaces). The LMP calculator is interfaced to another program, the Security Constrained Economic Dispatch (SCED) program which models PJM generators. The LMP and SCED programs work together to develop secure, economic operating points for the electric system and to provide Automatic Generation Control (AGC). These systems use data from various sources including, but not limited to, the EMS. All the models are created and maintained from input data received by PJM from various sources including TOs, GOs, Load Serving Entities, and other Reliability Coordinators.