Multi-Timescale Voltage Regulation for Source-Grid-Load-Storage Coordination
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Solution Overview
Problem
Existing voltage regulation techniques in power distribution networks are not collaborative and global, leading to high costs and ineffective control objectives, as they rely on local distributed control methods that cannot balance contradictory control objectives.
Innovation Solution
A multi-timescale voltage regulation method based on source-grid-load-storage multi-terminal collaboration, utilizing a multi-mode switching control model and multi-objective optimization to achieve optimal power values and voltage control across terminals, incorporating a Petri network and voltage security event triggers to manage network transmission loss and regulation costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If local distributed control method is used for voltage regulation, then regulation devices can be configured at each terminal independently, but the control objectives contradict and repel each other and cannot be balanced
Solution Approach 1:
The patent merges the control functions of source, grid, load, and storage terminals into a unified multi-terminal collaborative control system. The optimization model coordinates all terminals simultaneously to achieve global voltage regulation, eliminating the conflicts that arise from independent local control decisions.
Solution Approach 2:
The control system performs multiple functions simultaneously: voltage regulation, loss reduction, and economic optimization. The multi-objective optimization model handles contradictory goals (voltage control vs. cost minimization vs. loss reduction) in a unified framework, making the system universally applicable to various terminal configurations.
2Reliability
If multiple regulation devices are configured at each terminal, then local voltage control capability is improved, but the input cost increases significantly
Solution Approach 1:
The patent combines the regulation capabilities of different terminal types (source, grid, load, storage) into a coordinated system. Instead of deploying multiple expensive devices at each terminal, the system merges existing devices across terminals and coordinates their operation to achieve the same or better voltage control at lower cost.
Solution Approach 2:
The optimization model dynamically adjusts operating parameters (power output, voltage levels, reactive power) of existing devices to achieve optimal voltage regulation. By changing operational parameters rather than adding hardware, the system maintains control capability while minimizing regulation costs.
3Adaptability or versatility
If distributed regulation devices are deployed independently at each terminal, then local voltage adjustment is enabled, but the overall network loss and regulation cost cannot be optimized globally
Solution Approach 1:
The patent merges local voltage adjustment capabilities with global optimization objectives. The multi-terminal collaborative control system maintains the adaptability of local adjustment while coordinating all terminals to minimize overall network loss, achieving both local responsiveness and global efficiency.
Solution Approach 2:
The system uses feedback from voltage measurements and operational status of all terminals to continuously optimize control decisions. The optimization model incorporates real-time system state information to adjust terminal operations, enabling both local adaptability and global loss minimization through coordinated feedback control.
Data Source
AI summary
A multi-timescale voltage regulation method based on source-grid-load-storage multi -terminal collaboration of a power distribution network is disclosed, which comprises: establishing, based on a Petri network, a multi-mode switching control model based on voltage security event trigger to realize effective control of a global voltage; establishing multi-objective optimization taking into account a source-storage-load regulation cost and a network transmission loss to realize collaborative and dynamic control of controllable resources of a source terminal, a load terminal and a storage terminal in each operating mode; and establishing a source-storage-load multi-terminal collaboration-based distributed voltage control model based on voltage security event trigger over a short timescale by taking into account the problems of voltage magnitude being out of limit and voltage leap, and solving online an optimal control sequence of the source terminal, the load terminal and the storage terminal in a receding horizon.