Modular IED Segmentation for Substation Automation Flexibility
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Solution Overview
Problem
Existing substation automation systems face limitations in flexibility and maintainability due to semi-modular designs with fixed enclosures, which restrict module arrangement and replacement, and are not suited for high voltage applications beyond 1 kV, lacking interoperability and effective environmental adaptability.
Innovation Solution
A modular Intelligent Electronic Device (IED) with distinct, externally accessible modules for signal input, processing, and output, featuring a segmented backplane for inter-module communication and 'hot plug-in' capabilities, ensuring high voltage insulation and easy extension or replacement of modules, along with IEC 61850 compatibility for interoperability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single electrically insulating cover or cabinet is used to enclose all modules, then electrical insulation is provided, but the number of modules is limited and their arrangement is constrained
Solution Approach 1:
The patent divides the enclosure into multiple separate electrically insulating covers or cabinets, each dedicated to specific modules. This segmentation allows modules to be arranged flexibly across multiple enclosures while maintaining electrical insulation, resolving the contradiction between insulation reliability and arrangement flexibility.
2Stability of the object's composition
If a fixed enclosure is used, then structural stability is provided, but replacement or extension of individual modules is complicated
Solution Approach 1:
The patent segments the system into modular units with individual enclosures, allowing specific modules to be replaced or extended without affecting the structural stability of the entire system. Each module maintains its own stable enclosure while enabling easy maintenance operations.
Solution Approach 2:
The patent introduces dynamic reconfigurability to the system, allowing modules to be added, removed, or replaced while the system remains operational. This dynamic approach enables maintenance without system shutdown while preserving structural stability through standardized interfaces.
3Volume of stationary object
If modules are enclosed in a single cabinet, then space is optimized, but interoperability and environmental adaptability are reduced
Solution Approach 1:
The patent implements universal standardized interfaces and communication protocols across multiple independent enclosures, enabling interoperability between modules while allowing each enclosure to be optimized for specific environmental conditions. This multi-functional approach maintains space efficiency while enhancing adaptability.
Data Source
Figure 1~2
AI summary
According to the present invention, an Intelligent Electronic Device (IED, 10) such as a digital relay or protection device for Substation or Distribution Automation is conceived in a modular way, comprising distinct modules dedicated to distinct tasks and having dedicated housings or casings, which modules are mechanically arranged on a common support and both visible and accessible from outside of the IED at all times. Modules for signal input (process interface modules 20 comprising a number of input terminals 21) and signal processing (process data handling modules 30 for evaluating signals in view of an automated protection function or as a communication gateway) define the basis of a modular arrangement that is not delimited by any prefabricated cover or cabinet and that allows for a quasi-unlimited flexibility regarding the number of modules and an easy replacement or extension of individual modules.