Electrical Process Interface Device for Substation Automation
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Solution Overview
Problem
Process interface devices in substation automation or distribution automation systems typically lack the capability to communicate with devices on higher control and protection levels, limiting the flexibility of control and protection structures.
Innovation Solution
An electrical process interface device with a process interface unit and a signal conversion unit that enables direct communication with higher control and protection levels via parallel data connections and packet data according to the IEC 61850 communication standard, allowing data transmission between devices on different hierarchical levels without intermediate signal conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If process interface devices use traditional communication architecture, then device complexity is reduced, but communication capability with higher levels is limited
Solution Approach 1:
The device is divided into distinct functional modules: a process interface unit for interfacing with electrical processes and a signal conversion unit for protocol conversion. This segmentation allows each module to perform its specific function independently, enabling higher communication capability without proportionally increasing overall device complexity.
Solution Approach 2:
The signal conversion unit is designed to convert multiple different communication protocols into IEC 61850 format, making the process interface device universally compatible with various higher-level devices. This multi-functionality enhances adaptability while keeping the added complexity localized to the conversion unit.
2Ease of operation
If process interface devices communicate directly with higher levels, then control flexibility is improved, but intermediate signal conversion is eliminated
Solution Approach 1:
The signal conversion unit acts as an intermediary component that enables direct communication between process interface devices and higher-level devices. It mediates the protocol incompatibility by converting local protocols to IEC 61850, achieving control flexibility while containing the conversion functionality within a single integrated unit rather than requiring multiple intermediate devices.
3Adaptability or versatility
If multiple protocol conversions are implemented, then communication versatility is improved, but device complexity increases
Solution Approach 1:
Multiple protocol conversion functions are merged into a single signal conversion unit that processes all conversions to IEC 61850 format. This consolidation achieves high protocol compatibility while avoiding the complexity of multiple separate conversion devices, as the unit handles diverse protocol inputs through a unified conversion architecture.
Data Source
AI summary
An electrical process interface device for provision in a low control and protection level of a Substation Automation or Distribution Automation system; the device includes a process interface unit for interfacing the electrical process at the low control and protection level, which unit has a number of parallel data connections on which I/O data related to control and protective devices on higher control and protection levels may be transmitted. The device also includes a signal conversion unit connected to the data connections, which unit packets data of the data connections according to a communication standard used by control and protective devices on the at least one higher control and protection level for allowing data to be directly transmitted between the electrical interface device on the low control and protection level and other devices on higher control and protection levels.