IED Control via Wireless Phase Measurement Synthesis
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Solution Overview
Problem
Wireless current sensors in electric power distribution systems can experience communication interruptions due to power loss or interference, leading to incomplete or missing electrical measurements, which can disrupt the operation of intelligent electronic devices (IEDs) that rely on these measurements for controlling electrical components.
Innovation Solution
IEDs implement a system to determine the consistency of wireless communication with multiple phase sensors, allowing them to synthesize missing measurements from consistently received phases and switch operational modes based on communication reliability, ensuring continuous control of electrical components even during communication interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless current sensors are used to obtain current measurements, then flexibility and ease of installation are improved, but communication reliability deteriorates due to power loss or interference causing signal transmission failures
Solution Approach 1:
The IED determines communication consistency in advance by analyzing the timing and reception of wireless messages from sensors. It establishes whether communication is consistent before relying on measurements, allowing proactive detection of communication issues and preparation of alternative measurement approaches.
Solution Approach 2:
The patent introduces an intermediate synthesis process that mediates between unavailable sensor measurements and required control decisions. When communication is inconsistent, the IED synthesizes missing phase measurements from available phases and historical data, acting as an intermediary to bridge the gap between incomplete data and complete control requirements.
2Device complexity
If wireless current sensors operate without separate electrical wiring or battery, then device complexity is reduced, but measurement availability deteriorates when power is lost on the transmission line
Solution Approach 1:
When direct measurements from a wireless sensor are unavailable due to power loss or communication failure, the IED creates a synthesized copy of the missing measurement data by processing measurements from other phases and applying mathematical relationships. This synthesized copy allows the system to continue operating with complete measurement sets despite sensor failures.
Solution Approach 2:
The system dynamically changes operational parameters based on measurement availability. When communication consistency is determined to be poor, the IED switches from using direct sensor measurements to using synthesized measurements, effectively changing the data source parameter to maintain system operation under varying conditions.
3Measurement precision
If the IED requires consistent communication from all phase sensors, then measurement precision is maintained, but system productivity deteriorates due to operational disruptions when communication is lost
Solution Approach 1:
The IED accepts and processes partial measurement data from available phases rather than requiring complete data from all phases. By synthesizing missing measurements from the partial available data, the system maintains productivity with less than perfect measurement coverage, applying partial action to achieve complete operational functionality.
Solution Approach 2:
The system dynamically adapts its measurement acquisition and processing strategy based on real-time communication consistency determination. When communication is consistent, it uses direct measurements; when inconsistent, it switches to synthesized measurements. This dynamic adaptation allows continuous operation and maintains productivity despite varying communication conditions.
Data Source
AI summary
Systems, methods, and devices are provided for controlling part of an electric power distribution system using an intelligent electronic device that may rely on communication from wireless electrical measurement devices. Wireless electrical measurement devices associated with different phases of power on an electric power distribution system may send wireless messages containing electrical measurements for respective phases to an intelligent electronic device. When wireless communication with one of the wireless electrical measurement devices becomes inconsistent or lost, the intelligent electronic device may synthesize the electrical measurements of the missing phase using electrical measurements of remaining phases. The intelligent electronic device may use the synthesized electrical measurements to control part of the electric power distribution system.