Journal
IEEE TRANSACTIONS ON SMART GRID
Volume 13, Issue 3, Pages 2050-2062Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSG.2021.3138099
Keywords
Uncertainty; Optimization; Distribution networks; Electricity supply industry; Real-time systems; Proposals; Power system reliability; Distribution network; electricity market; operating envelope; OPF; reserve
Categories
Funding
- Project Optimal DER Scheduling for Frequency Stability,
- Australian Renewable Energy Agency (ARENA), ARENA's Advancing Renewables Program
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This article focuses on the safe and reliable operation of the power system as it embraces consumer-owned distributed energy resources (DER) and enables consumer participation in the wholesale market. The alternating direction method of multipliers (ADMM) is used to optimize operating envelopes, considering the distributed nature of the problem. The introduction of a piecewise affinely adjustable robust bidding approach and a piecewise affine Q-P controller helps compensate for uncertainty variations and optimize network capacity.
As our power system modernises to embrace consumer-owned distributed energy resources (DER), network operators must ensure a safe and reliable operation while enabling consumers to trade their flexibility in the wholesale market. To enable this, we obtain network-secure operating envelopes that facilitate participation of consumers in energy and reserve markets. Given the distributed nature of the real-world problem, we use the alternating direction method of multipliers (ADMM) to optimise for operating envelopes such that any market action of consumers within these envelopes satisfies the distribution network constraints. To guarantee that the uncertainty realisation in live operation neither leads to network infeasibilities (due to exceeding the operating envelope) nor penalises DER-owners (due to market bid violation), we introduce a piecewise affinely adjustable robust bidding approach that can compensate for uncertainty variations in real-time. We also open up network capacity and minimise its losses, by proposing an additional piecewise affine Q-P controller that exchanges inverter reactive power with the grid. Our results on a 69-bus distribution network highlight the effectiveness of our proposal compared to alternative approaches.
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