[Paper Review] A Rudiment of Energy Internet: Coordinated Power Dispatching of Intra- and Inter- Local Area Packetized-Power Networks

Jinghuan Ma|arXiv (Cornell University)|Dec 24, 2017

Microgrid Control and Optimization20 references3 citations

TL;DR

This paper proposes a cooperative power dispatching framework for interconnected Local Area Packetized-Power Networks (LAPPNs) that coordinates intra- and inter-LAPPN power transmission. By integrating subscriber matching and a two-layer scheduling mechanism, it maximizes energy delivery while ensuring fairness in transmission urgency, achieving high utilization and low losses in simulations of a two-LAPPN system.

ABSTRACT

Local area packetized-power network (LAPPN) provides flexible local power dispatching in the future Energy Internet. With interconnections among multiple LAPPNs, power dispatching can be further extended to intra- and inter-LAPPN power interchanges. It becomes a significant issue to schedule the two kinds of power interchanges as, from a system perspective high utilization of available scheduling time slots and low overall transmission loss should be guaranteed, and from a subscriber perspective a high scheduled ratio of transmission requests with a fair transmission sequence in terms of transmission urgency are expected. To this end, we propose a cooperative power dispatching framework for connected LAPPNs, including subscriber matching and two-layer power transmission scheduling. The former matches subscribers from different LAPPNs, considering both subscriber preferences and power transmission loss. The latter coordinates the intra- and inter-LAPPN power packet transmission to maximize the amount of energy delivered with a guaranteed fairness on user urgency. Simulation results of a two-LAPPN system are provided, which demonstrate that the proposed framework can achieve effective and efficient power dispatching in terms of the mentioned concerns, and reveal facts on ideal system capacity and how to manipulate the proportions of the two kinds of transmissions according to network status.

Motivation & Objective

• Address the challenge of coordinating intra- and inter-LAPPN power interchanges in the emerging Energy Internet.
• Ensure high system utilization of scheduling time slots and low overall transmission loss in interconnected LAPPNs.
• Guarantee a high scheduled ratio of transmission requests with fair prioritization based on transmission urgency for subscribers.
• Develop a scalable framework that balances energy efficiency and user fairness across multiple LAPPNs.

Proposed method

• Introduce a two-layer power transmission scheduling framework: one for intra-LAPPN and another for inter-LAPPN coordination.
• Implement a subscriber matching algorithm that considers both subscriber preferences and power transmission loss across LAPPNs.
• Use a cooperative scheduling mechanism to maximize total energy delivered while maintaining fairness in transmission sequence based on urgency.
• Model power transmission as time-slotted packetized energy exchange to enable flexible and dynamic dispatching.
• Optimize scheduling decisions by jointly considering available time slots, transmission loss, and urgency-based priority queues.
• Apply simulation-based evaluation in a two-LAPPN system to validate framework performance under varying network conditions.

Experimental results

Research questions

• RQ1 How can intra- and inter-LAPPN power interchanges be effectively coordinated to maximize energy delivery and system efficiency?
• RQ2 What is the optimal trade-off between intra- and inter-LAPPN transmission proportions based on real-time network status?
• RQ3 How can fairness in transmission urgency be guaranteed while maximizing the number of successfully scheduled requests?
• RQ4 What impact do transmission losses and subscriber preferences have on the overall scheduling performance in interconnected LAPPNs?

Key findings

• The proposed framework achieves effective and efficient power dispatching by balancing energy delivery and fairness in transmission urgency.
• Simulation results show a significant improvement in the scheduled ratio of transmission requests compared to non-cooperative schemes.
• The framework maintains low overall transmission loss while maximizing utilization of available time slots in the two-LAPPN system.
• The system reveals an ideal capacity threshold beyond which inter-LAPPN transmission becomes more critical for performance.
• Adjusting the proportion of intra- and inter-LAPPN transmissions based on network status can significantly enhance system throughput.
• The two-layer scheduling mechanism effectively coordinates power delivery across LAPPNs, ensuring fairness without compromising energy delivery volume.