Remote AC Mitigation Device Control via Wireless Switching
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Solution Overview
Problem
Existing methods for testing and maintaining AC mitigation systems on buried conductive structures, such as pipelines, require manual intervention to disconnect and reconnect devices, which is time-consuming and hazardous, and lack efficient remote monitoring for effectiveness.
Innovation Solution
A remotely controlled system using a microprocessor-controlled apparatus with wireless communication, comprising a mechanically controlled switch, current transformers, and a microprocessor to disconnect and reconnect AC mitigation devices, allowing for remote monitoring and testing of AC mitigation systems coupled to buried conductive structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual disconnection and reconnection of AC mitigation devices is performed, then testing and maintenance can be conducted, but it requires time-consuming travel to each device and exposes workers to hazards
Solution Approach 1:
The patent replaces manual mechanical operations with an automated remote control system. A control apparatus with a microprocessor receives commands and automatically controls the disconnection and reconnection of AC mitigation devices through electronically controlled switches, eliminating the need for workers to physically travel to each device location.
Solution Approach 2:
The system enables self-service operation where the AC mitigation devices can be disconnected and reconnected automatically through remote commands without requiring human intervention at the device location. The control apparatus autonomously manages the switching operations based on received commands.
2Reliability
If periodic testing of cathodic protection is performed, then protection effectiveness can be verified, but AC mitigation devices must be disconnected requiring manual intervention
Solution Approach 1:
The patent replaces manual mechanical switching operations with electronic control. The control apparatus uses electronically controlled switches that can be actuated remotely via communication signals, making the disconnection and reconnection process automated and eliminating the need for workers to manually access each device.
Solution Approach 2:
The patent introduces a communication system as an intermediary between the operator and the AC mitigation devices. Commands are transmitted through communication signals that activate the electronically controlled switches, providing a remote interface that simplifies operation and eliminates direct human contact with the devices.
3Object-affected harmful factors
If AC mitigation devices are installed at intervals along the pipeline, then AC induced on the pipe can be mitigated, but many devices are necessary for long pipelines
Solution Approach 1:
The patent makes each AC mitigation device multi-functional by equipping it with both AC mitigation capability and remote control functionality. The devices can operate autonomously when connected and can be remotely disconnected when needed for testing, eliminating the need for separate control mechanisms at each location.
Solution Approach 2:
The patent merges the AC mitigation function with the control function into a single integrated device. The AC mitigation device incorporates the switching mechanism and communication interface, combining what would traditionally be separate components into one unified unit that simplifies the overall system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables safe, efficient, and automated remote disconnection and reconnection of AC mitigation devices, facilitating periodic testing and monitoring of their effectiveness, reducing manual labor and hazards associated with manual intervention.
Implementation Method 1
a mechanically controlled switch coupled between the AC mitigation device and the one or more AC mitigation conductors
Implementation Method 2
current transformers to measure the alternating current flowing through the AC mitigation device
Data Source
AI summary
Systems, apparatus, and methods for use with an AC mitigation device coupled to an underground conductive structure and to one or more buried AC mitigation conductors adjacent to the underground structure. AC current transformers sense AC flowing between the mitigation device and the underground structure, and between the mitigation device and the mitigation conductors. A controllable switch is coupled between the mitigation device and the underground structure. Digitizing circuitry generates digital data corresponding to the AC sensed by the current transformers when the mitigation device is connected to and disconnected from the underground structure. Wireless communication circuitry processes signals received from a remote site to control the switch to selectively disconnect and reconnect the mitigation device from and to the underground structure to produce AC current signals indicative of mitigation device operation, and transmits the digital data to the remote site for processing to remotely test the AC mitigation device.