Operational Hydropower Simulation in Cascaded River Systems for Intraday Re-Planning

Abstract

In this paper, we introduce an operational implementation of a hydropower simulator for cascaded river systems. It is presently used for decision support in the intraday re-planning by the largest hydropower producer in Norway. It simulates the hydro production at a highly detailed level with very fine time resolution. The outcome obtained in one time period will be immediately used to facilitate the calculation at the next time period. The continuous updating of the information within short intervals not only advances the convergence but also allows the simulator to capture nonlinear dynamics and state-dependency of the complex hydrological systems. Case studies illustrate the basic properties of the simulation algorithm and the role as a decision support tool in intraday re-planning. Numerical results demonstrate the superiority of the simulation model over the re-optimization, both in terms of precision and calculation time, when verifying whether a manual change in the dispatch plan can avoid spillage.

Simulation of hydraulic power matching–based risk and economic evaluation among cascade hydropower stations in spot transactions

“…More recently, such simulations and decisionmaking in the electricity market have become more popular as the power generation systems became an integral part of the smart grid systems (Ringler et al, 2016). Whereas the previous research of Ivar Skjelbred and Kong (2018) made intraday replanning after simulating the actual operation process. The study by Aliabadi et al (2017) concluded bidding decisionmaking by simulating the bidding behaviors of generators under different market modes, such as capacity and auxiliary market.…”

Real-Time Dispatch for Multi-Unit Hydroelectric Plants With AC Optimal Power Flow: The Case of the Santo Antonio System

“…Concerning the RTD and related short-term hydro scheduling (STHS) problems, such as the hydro unit commitment (HUC) [10], given the necessity of accurate HPF representation, the transmission network modeling implicates in complex optimization problems. Works that deal explicitly with RTD problems in hydro plants, similar to [11]- [12], are relatively less common than those focusing on other types of STHS problems, such as the HUC. As far we know, there are no works specifically oriented at handling the hydro RTD and the ACOPF simultaneously.…”