Mobile Energy Storage Coordination for Distribution Network Flexibility
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Solution Overview
Problem
Existing distribution networks with distributed mobile energy storage systems lack effective integration and cooperation between distant systems, resulting in limited flexibility and unified management, as they primarily operate within small areas and are not efficiently coordinated.
Innovation Solution
A control method and system that involves a sub-station coordination system acquiring internal data, sending it to a master-station dispatching system, which generates control instructions based on both internal and external data to perform unified coordinate control on distributed mobile energy storage systems, using model predictive control for optimal regulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If distributed mobile energy storage systems operate independently in small areas, then local energy regulation is achieved, but unified management capability and system flexibility deteriorate
Solution Approach 1:
The control system is segmented into hierarchical levels: sub-station coordination systems manage local energy storage systems within specific areas, while a master-station dispatching system coordinates across the entire distribution network. This segmentation allows independent local operation while enabling unified overall management through the hierarchical structure.
Solution Approach 2:
The sub-station coordination system acts as an intermediary between the master-station dispatching system and the distributed mobile energy storage systems. It receives control instructions from the master station and translates them into local control actions, enabling unified management while maintaining local operational autonomy.
2Speed
If distributed mobile energy storage systems operate autonomously, then local responsiveness is improved, but cooperative control and system-wide optimization deteriorate
Solution Approach 1:
The master-station dispatching system performs preliminary actions by generating control instructions based on predicted future states of the distribution network. These instructions are sent to sub-station coordination systems in advance, enabling both local responsiveness and system-wide optimization through predictive model-based control.
Solution Approach 2:
The system implements feedback mechanisms where sub-station coordination systems report local operational data to the master-station dispatching system. The master station uses this feedback to adjust control instructions and achieve system-wide optimization while maintaining local responsiveness through continuous monitoring and adjustment.
3Adaptability or versatility
If multiple distributed mobile energy storage systems are integrated into a unified control system, then flexibility and adaptability improve, but control system complexity increases
Solution Approach 1:
The control system is divided into modular sub-station coordination systems and a master-station dispatching system. Each module has defined functions and interfaces, which reduces overall complexity while enabling flexible integration of multiple distributed mobile energy storage systems through standardized communication protocols.
Solution Approach 2:
The master-station dispatching system serves multiple functions: it coordinates all distributed mobile energy storage systems, manages sub-station coordination systems, and optimizes overall network performance. This multi-functionality reduces the need for separate specialized systems, thereby controlling complexity while maintaining high flexibility.
Data Source
AI summary
A control method and system for a distribution network with distributed mobile energy storage systems is disclosed which relates to the power field. The present invention manages the multiple distributed mobile energy storage systems in the distribution network in a unified way, to improve the flexibility of the distribution network, and enable the distributed mobile energy storage systems to fully smooth new energy generation fluctuations, implement peak cut, facilitate grid auxiliary services, and improve the power quality. The control method includes: acquiring, by a sub-station coordination system, data of the distributed mobile energy storage systems; receiving, by a master-station dispatching system, the data of the distributed mobile energy storage systems, and obtaining external data; generating, by the master-station dispatching system, a control instruction; and controlling, by the sub-station coordination system, the distributed mobile energy storage systems. The control system includes the master-station dispatching system and the sub-station coordination systems.