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Introduction

This section covers what is meter tampering, why is this a problem for utility providers, and some common ways a meter is tampered.

Current sensor and metrology architecture options

This section compares two types of current sensors used in electricity meters: current transformers and shunts.  In addition, it discusses three different architectures for sensing the voltage and current samples used to calculate the metrology parameters.  These architectures include a SoC-based architecture, AFE-based architecture, and ADC-based architecture.

Introduction to TIDA-010037 reference design

This section provides an overview of the TIDA-010037 reference design, which uses the ADS131M04 delta sigma standalone ADC for sensing the voltage and current necessary to calculate metrology parameters.  The TIDA-010037 design targets Class 0.1 split-phase current transformer meters.

TIDA-010037 hardware design

This section provides an overview of the hardware used in the TIDA-010037 design, which includes information on the eFuse circuit used to create a current limited rail for connection to an external communication module.  In addition, this section discusses the circuits used to translate the Mains voltage and current to the voltage waveform sensed by the ADS131M04.

Designing software for split-phase electricity meters that use standalone ADCs

This section covers the initialization code and algorithms that can be used to calculate metrology parameters in a split-phase system using the sensed voltage and current samples

Calibration and metrology accuracy results

This section discusses the procedure used to calibrate the TIDA-010037 design and the results obtained with this design.

Summary

In this section, a summary of the entire “How to design high-accuracy CT-based split-phase electricity meters using standalone metrology ADCs” training module would be covered.  Links will be provided for the reference designs that were discussed during this training series.

Current sensor and metrology architecture options

This section compares two types of current sensors used in electricity meters: current transformers and shunts.  In addition, it discusses three different architectures for sensing the voltage and current samples used to calculate the metrology parameters.  These architectures include a SoC-based architecture, AFE-based architecture, and ADC-based architecture.

Introduction to TIDA-010036 reference design

This section provide an overview of the TIDA-010036 reference design, which uses the ADS131M04 delta sigma standalone ADC for sensing the voltage and current necessary to calculate metrology parameters.  The TIDA-010036 design targets Class 0.5 single-phase two-wire meters with shunt current sensors and has a compact, magnetically immune cap-drop power supply to power the design from AC mains.

TIDA-010036 hardware design

This section provides an overview of the hardware used in the TIDA-010036 design, which includes the circuits used to translate the Mains voltage and current to the voltage waveform sensed by the ADS131M04.  In addition, it covers the TPS7A78-based cap-drop power supply used in this design.

Designing software for 1-phase electricity meters that use standalone ADCs

This section covers the initialization code and algorithms that can be used to calculate metrology parameters in a single-phase system using the sensed voltage and current samples.

ADS131M04 current detection mode for detecting neutral removal tampering

This section discusses current detection mode, which is a special low-power mode of the ADS131M04 standalone ADC, that can detect the presence of current when someone has tampered with a meter by removing its neutral connection.

Calibration and metrology accuracy results

This section discusses the procedure used to calibrate the TIDA-010037 design and the results obtained with this design.

Summary

In this section, a summary of the entire “How to design 1-phase shunt electricity meters using standalone metrology ADCs” training module would be covered.  Links will be provided for the reference designs that were discussed during this training series.
Applications of voltage supervisors (reset ICs)

Overview of supply voltage supervisors

This video will cover the first section of the training module that provides an overview of supply voltage supervisors. We will start with a brief introduction to Supply Voltage Supervisors. Next, we will present some system level design challenges that can be solved using the Supply Voltage Supervisors and end the presentation with information on finding the right collateral and resources for further help.

Applications of voltage supervisors (reset ICs)

Applications of voltage supervisors in grid infrastructure

Leakage current detection is necessary in most of the industrial and residential breakers as well as in many EEQ such as EV chargers, PV inverters etc. In this course we’ll deep dive into circuit breakers and review TIDA-010041 reference design that provides an easy and efficient method of detecting residual current or ground fault by leveraging voltage supervisor IC. This solution also finds application in over-voltage detection in binary input module EEQ. In addition, this also includes power sequencing using supply voltage supervisors.

6.6kW Bi-directional OBC_Introduction and Overview

In this series of presentations, we go through the HEV/EV market status and history, OBC specifications, technology trend, topology selections and design considerations of an OBC system. Complete test results of a 6.6kW OBC reference design (Including AC-DC rectifier and isolated DC-DC converter) will be shown in the end of this paper to demonstrate the performance of our TIDesigns as well as TI SiC and embedded Technologies.

6.6kW Bi-directional OBC_CLLLC Resonant DAB Converter

In this series of presentations, we go through the HEV/EV market status and history, OBC specifications, technology trend, topology selections and design considerations of an OBC system. Complete test results of a 6.6kW OBC reference design (Including AC-DC rectifier and isolated DC-DC converter) will be shown in the end of this paper to demonstrate the performance of our TIDesigns as well as TI SiC and embedded Technologies.

Detecting case tamper attacks using inductive switches

The first line of defense against tampering by bypassing current, reversing connections, and disconnecting leads is the meter case. Due to this, it is common for utilities to require some form of intrusion detection system to detect when someone opens a case.  In this section, we will cover how to detect someone trying to open the case of a meter.

Detecting magnetic tampering using hall-effect sensors

For anti-tampering, it is common to try to detect the presence of a strong magnet. In this section, we will cover the use of hall sensors for low-power detection of strong magnetic fields in three dimensions.  Details on our magnetic tamper detection reference design, TIDA-00839, will be provided as well as some of the design considerations that were kept in mind when creating this reference design.  

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