This module covers the “Innovative 7-Segment LCD Control Using GPIO Pins and SW” section of the “Single-chip Smart Water meter with Dual-band RF link and InfraRed port” training series.
The third part of the session provides details on the need to focus on AC analog input module and its use cases in different types of protection relays, Different types of current sensors and the use cases for these sensors including key advantages and dis-advantages. Explains AC analog input module architecture including block diagram showing the critical products and EERD with different subsystems identified showing different approaches for designing an AC AIM.
Gain a deep dive into common design consideration for a Level 1, 2 or 3 EV charging (pile) station and explore the service equipment block diagram for each.
Non-technical losses (“theft”) account for billions of dollars of revenue loss for utility providers around the world as individuals are able to hack meters to slow or stop the accumulation of energy usage statistics. This loss has driven increased requirements for enhancing the protection designed into new smart meters. This training session will discuss different methods of attacking smart meters and how TI’s analog portfolio can be used to detect or even prevent these attacks. In one scenario magnets are used to saturate any transformers present in the system.
Over the last few years, the industry has been moving from mechanical to fully electronic meters. We have seen more and more functionalities such as metrology with ultrasonic technology, leak detection with audio patterns, communication with low power and long range radio being added to smart meters. These new functionalities allow utilities to deliver new services such as condition-based maintenance and remote monitoring of meters, which lead to efficient management of the network and better customer experience.
Some EU standards like EN1434-3 for heat meters require optical interface as per EN62056-21, where two separate IR LEDs are used (one for receive and one for transmit direction). TIDA-01212 shows an alternative approach, which uses a single IR LED to implement a bi-directional IrDA PHY link with 9.6 kbps in half-duplex mode. The design approach can the system reduce cost of any smart (sub-)metering device by replacing the legacy optical IrDA PHY modules with two separate LEDs.
Both isolated modulator and isolated metrology AFE architectures have their advantages with respect to each other. Depending on system requirements, one architecture may be more feasible than the other. This section compares the two isolated shunt sensing architectures and discusses which architecture is best for different system requirements.
Design Details for TI design TIDA-00834 High Accuracy Analog Front End Using 16-Bit SAR ADC with ±10V Measurement Range Reference Design
Fifth part of the session will focus on providing detailed information on TIDA-00834 TI design. The initial slides cover Design Overview, Features, Key Components, test Setup, market differentiators, Block Diagram with links to relevant TI Designs, EVMs and TI product used in this design. Circuit representation and detailed description for ADC interface, Voltage and Current measurement and Power supply are provided. Graphs for Voltage and Current measurement accuracy are shown; along with collaterals and TI design links that can be referred by customers during design.
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.
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.
The TMP116 digital precision temperature sensor for the -55 to +125ºC range achieves higher accuracy than the Class AA PT sensor with a 1-point calibration. A small PCB including TI's TPD1E10B06 or TPD1E04U04 protection devices can be sealed into a RTD metal tube and meet the EN 61000-4-2 and -4-4 levels of ESD protection. The 64-bit internal EEPROM inside TMP116 stores user defined calibration data into the digital temperature sensor, simplifying integration with application MCUs, such as MSP430FR6047, FR6989 or CC13xx/26xx wireless MCU families.
Welcome to the world of Power Systems. The first part of the session focuses on Introduction to Power Systems, Goal of Power systems protection, fundamentals of Electricity, AC or DC, Importance of electricity, Power system voltage levels and consumers of electricity. Need and Complexities in protection of power system primary Equipment like Generators, Motors, Transformers and Circuit Breakers and finally analysis of what can go wrong on a transmission line.