Enhanced Ramping Product Design to Improve Power System Reliability

TL;DR

This paper introduces an enhanced ramping product for power systems that improves reliability and reduces costs by considering start-up/shutdown trajectories and ensuring real-time deployability.

Contribution

It proposes a new ramping product with a mixed integer linear programming formulation that addresses deployment issues and enhances system reliability.

Findings

Improved generation scheduling reduces capacity shortages.

Enhanced ramping product increases system reliability.

Simulation confirms cost reduction and operational efficiency.

Abstract

The roll-out of a flexible ramping product provides Independent System Operators (ISOs) with the ability to address ramping capacity shortages. ISOs procure flexible ramping capability by committing more generating units or reserving a certain amount of head room of committed units. In this paper, we raise the concern of the possibility that the procured ramping capability cannot be deployed in real-time operations. As a solution to the non-delivery issue, we provide a new ramping product designed to improve reliability and reduce the expected operating cost. The trajectory of start-up and shutdown processes is also considered in determining the ramping capability. A new optimization problem is formulated using mixed integer linear programming to be readily applied to practical power system operation. The performance of this proposed method is verified through simulations using a small-scale system and IEEE 118-bus systems. The simulation results demonstrate that the proposed formulation can realize improved generation scheduling alleviating capacity shortages.