Power quality analyzer

Products and reference designs

Power quality analyzer

Block diagram

Overview

Power quality analyzers are used to continuously monitor and analyze electricity lines for disturbance which can disrupt the reliable delivery of energy or cause damage to equipment plugged into the grid. Power quality disturbances include events such as voltage sags and swells, transients, harmonic distortion and voltage/current imbalance.

Design requirements

    Modern power quality analyzer designs require:

  • Current and voltage sensing of poly-phase electricity and revenue-grade energy measurement compliant with ANSI C12.20 and IEC-62053 standards.
  • Analysis of power quality metrics such as harmonic distortion.
  • Power supply design, digital input/output, real-time networking and wireless communications.

Explore applications similar in function and design

Block diagram

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Power quality analyzer

Voltage sensing Voltage sensing PT PT RDIV RDIV Analog I/O Analog I/O Digital I/O Digital I/O Line A/B/C Line A/B/C Neutral Neutral Voltage sensors Voltage sensors PT PT RDIV RDIV Current sensors Current sensors CT CT RSH RSH 5V 5V 3.3V 3.3V +/-12V +/-12V Hall sensor Hall sensor AC/DC power supply AC/DC power supply PWM controller PWM controller eFuse eFuse VAC VAC Shunt reference Shunt reference Optocoupler Optocoupler Load switch Load switch Energy storage Energy storage Battery gauge / monitor Battery gauge / monitor Energy harvesting Energy harvesting DC/DC power supply DC/DC power supply Buck converter Buck converter PMIC PMIC LDO LDO Boost converter Boost converter PoE PoE eFuse eFuse Power ORing Power ORing Voltage monitoring Voltage monitoring Protection Protection Protection & filter Protection & filter Measurement AFE Measurement AFE VREF VREF Precision ADC Precision ADC Precision ADC Precision ADC AMP AMP VREF VREF AMP AMP Isolated DC/DC Isolated DC/DC AMP AMP AMP AMP Transient recording AFE Transient recording AFE Isolated DC/DC Isolated DC/DC High-speed ADC High-speed ADC VREF VREF AMP AMP AMP AMP Isolation Isolation Isolation Isolation Processing Processing DSP DSP MCU MCU HMI HMI Captouch Captouch LED driver LED driver Backlight driver Backlight driver Relay drivers Relay drivers Control inputs Control inputs Ambient light sensor Ambient light sensor LEDs LEDs LEDs LEDs Wired interface Wired interface ESD ESD DAC DAC AMP AMP AMP AMP ADC ADC MOSFET MOSFET Isolation Isolation USB USB RS-232/485 RS-232/485 ETH PHY ETH PHY Wireless interface Wireless interface PA/LNA PA/LNA Bluetooth transceiver Bluetooth transceiver WiFi transceiver WiFi transceiver Self diagnostics/monitoring Self diagnostics/monitoring Temp/humidity sensor Temp/humidity sensor SVS SVS WDT WDT Clocking Clocking Fanout buffer Fanout buffer Clock synthesizer Clock synthesizer Crystal oscillator Crystal oscillator RTC RTC Memory Memory Termination Termination DRAM DRAM Flash Flash EEPROM EEPROM

Technical documentation

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Type Title Date
Application note Design for State Grid Corporation of China RS-485 Standard – THVD1500 30 Nov 2017
White paper Smart power opens door to more efficient electrical use 21 Mar 2016
Application note Supercapacitor Backup Power Supply w/ Current Limit for Smart Electricity Meter (Rev. A) 11 May 2022
Technical article Voltage supervisor requirements for e-meter applications PDF | HTML 10 Aug 2023
Technical article Analog interfacing for grid infrastructure with Sitara processors PDF | HTML 08 Aug 2023

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