IGDT‐based robust optimal utilisation of wind power generation using coordinated flexibility resources

Abstract

This study investigates the application of a robust method to solve the problem of security constrained unit commitment (SCUC) with flexible resources for managing the uncertainty of significant wind power generation (WPG) to sustain the load-generation balance. The flexible resources include up/down ramping capability of thermal units, hourly demand response, energy storage system and transmission switching action through an integrated scheme. The application of mixedinteger linear programming to deal with the SCUC problem with flexibility resources has been discussed in this study using information-gap decision theory (IGDT) to realise a robust strategy for power system decision maker. Besides, this study proposes an effective solution strategy based on Benders' decomposition to solve the proposed problem. Numerical simulation results on the modified six-bus system and IEEE 118-bus system clearly demonstrate the benefits of applying flexibility resources for managing the WPG uncertainty and validate the applicability of the proposed IGDT-based SCUC model.

Uncertainty-Based Models for Optimal Management of Energy Hubs Considering Demand Response

“…A multistage transmission expansion planning under wind power uncertainties is obtained using the IGDT method in References [40][41][42][43]. A security constrained unit commitment (SCUC) with undispatchable resources with a high penetration of wind power for retaining the load-generation balance is proposed in References [44,45], and the frequency management is presented in References [46,47].…”

Flexible Modern Power System: Real-Time Power Balancing through Load and Wind Power

“…Non-conventional loads such as Cold Storage Power Plants (CPL), Electric Vehicles (EVs) and Heat Pumps (HPs) can provide the required system services for supporting the grid operations due to their dynamic load characteristic [5]. Their flexible consumption, coupled with their energy storage capabilities and controlled through external or local units, offers a promising solution to the above-mentioned problems [6]. According to the study carried out in [7] for the modern Danish power system, the flexible consumption units in the Danish system are capable of providing ancillary services.…”

Analysis of Wind Ramping Product Formulations in a Ramp-constrained Power Grid

“…Recently, the substantially increasing integration of variable renewable energy sources, such as wind power, has significantly changed the generation portfolios of many electric power systems [1][2][3][4]. To operate power systems with high penetration levels of variable renewables, the systems need more flexible resources to mitigate the variability and uncertainty [5][6][7][8][9][10]. In realtime operations with high penetration of renewables, one of the major challenges is ensuring sufficient ramping capability.…”

“…In these designs, specifically in the real-time markets, flexible ramp capacity is procured by adding ramp requirements in the original deterministic realtime economic dispatch (RTED) models [8], such that the ramp product is co-optimized with energy and other ancillary services in the real-time energy market. In these market designs, wind power is usually treated as a source of uncertainty that contributes to the ramping requirement in the system; however, the use of wind power to increase system reliability and flexibilityincluding modeling it as a flexible ramp capacity provider-is attracting more attention due to the rapidly increasing penetration of wind power [9][10][11]. The system flexible ramp requirements and the impacts of ramp products on market clearing have been analyzed in [12][13][14][15][16].…”

“…These studies analyze the impacts of flexible ramping on a system's reliability and its operation costs from the system operator standpoint. Further, the benefits of wind power providing ramp products were analyzed in [5,9,18] to improve system reliability and reduce ramp scarcity. Reference [19] introduced the concept of flexible dispatch margin as an opportunity for wind resources to participate in reducing variability and uncertainty as renewable penetration increases.…”