On August 9, 2019 , the largest and most populous power outage occurred in the United Kingdom since the "London Blackout" in 2003. Some major cities in the United Kingdom, including London, experienced suspension of subways and intercity trains and interruption of road traffic signals. , Some hospitals are unable to provide medical services due to insufficient backup power, and about 1 million people are affected. As one of the most prosperous metropolises in the world, the power outage in London has made the world see the overwhelmed power system behind the international metropolis. The power system needs to usher in a new wave of technological revolution.
As an emerging power grid automation system, the Ubiquitous Power Internet of Things is gradually helping to realize the upgrade of the traditional power grid to the energy Internet. "During this process, the industry needs to constantly find and apply new methods and new technologies to support the safe, reliable, high-quality, and efficient operation of the ubiquitous power IoT power distribution system. How to integrate IoT technology with the entire power distribution system through ADI chips? The combination of systems is a problem we have been working on solving." Zhang Songgang, product manager of ADI, a high-performance analog technology provider, said at the 10th Power Distribution Technology Application Forum held recently.
ADI Product Manager Zhang Songgang gave a keynote speech "ADI Smart Sensing Technology Helps Ubiquitous Power Internet of Things"

Explore comprehensive intelligent perception and promote the deployment of ubiquitous power Internet of Things as a comprehensive information management system that integrates big data and cloud computing, edge computing technology, data transmission, artificial intelligence, mobile Internet control technology, modern equipment and management technology. The ubiquitous power Internet of Things, also known as the grid automation system, is a new technology that comprehensively carries the entire business of grid operation, enterprise operation, customer service, and new business formats by connecting equipment, customers, and data in all aspects of energy production, transmission, and consumption in real time. The first-generation information communication system has the characteristics of ubiquitous terminal access, platform open sharing, computing cloud-fog collaboration, data-driven business, and application on-demand customization. It is deeply integrated with the smart grid to form the Energy Internet. The distribution Internet of Things is the implementation of the ubiquitous power Internet of Things in the field of distribution, and intelligent sensing is the basic support for the distribution Internet of Things.
According to the statistics of my country State Grid Corporation of China, there are currently more than 500 million terminal devices connected to the State Grid system (including 470 million meters and tens of millions of various protection, collection and control devices). After completion, the number of access devices will reach 2 billion. "From the perspective of the Internet of Things, the real-world data collection involved in the entire ubiquitous power Internet of Things system has a huge demand for various sensors, which can be said to be cosmic." Zhang Songgang mentioned that the construction of the distribution Internet of Things will To improve the current sensing terminal's problems such as insufficient coverage of sensing components, low fast response capability, and energy acquisition technology that has yet to be broken through, high reliability, miniaturization, low power consumption, integration, passivation and high security are intelligent sensing technology Future direction. How to do the monitoring of the electrical status and the monitoring of the power distribution environment? Committed to providing customers with products and solutions in all aspects of perception, measurement, communication, network security and edge computing, ADI is working with the company's customers to explore ways to deploy the ubiquitous power Internet of Things faster. "
ADI understands the need for intelligent sensing in the ubiquitous power Internet of Things

Strengthening condition monitoring and environmental monitoring to ensure the safety of power distribution equipment "It is very important to monitor the power transmission links that everyone is familiar with, such as wire ice floes and geological disasters. Based on MEMS accelerometers, inertial navigation units and temperature sensing, these systems are integrated. Combined together, the safety monitoring of power lines can be fully realized." Zhang Songgang pointed out. The development of MEMS technology began as early as the 1970s, and ADI was one of the earliest companies involved in this field. At present, ADI focuses on the application of MEMS inertial navigation technology in various industries, with ultra-low noise and ultra-low power consumption. And high temperature performance to achieve a variety of more robust application scenarios.
ADI's high-performance MEMS sensors address more robust application scenarios

Take, for example, the ADXL1001 and ADXL1002, two MEMS accelerometers specifically designed for industrial condition monitoring applications, which provide ultra-low noise density over an extended frequency range with two full-scale range options and withstand external shocks up to 10,000g , so the main faults that occur in rotating machinery on the market today (such as sleeve bearing damage, misalignment, unbalance, friction, looseness, transmission failure, bearing wear and cavitation) are measured in ADXL100x series condition monitoring accelerometers within the range.
In addition, the ADXL1001 and ADXL1002 have an integrated full electrostatic self-test function and an out-of-range indicator, which can provide advanced system-level functions and can be used in embedded applications. In terms of power consumption, with a single supply of 3.3V to 5.25V, the ADXL1001/ADXL1002 also allow the design of wireless sensing products. "In addition, ADI's inertial navigation unit that combines MEMS, gyroscopes and accelerometers can directly implement inertial navigation applications in many power fields, such as combining with low-noise multi-axis accelerometers to monitor wire gallop and sag. , and the inertial navigation unit can also realize the fault location of the patrol robot, etc." Zhang Songgang emphasized.
In addition to condition monitoring, ADI also has a series of sensing technologies for environmental perception, including temperature, gas, optics and acoustics, which can be used in on-site environmental monitoring and power distribution cabinet monitoring. Among them, the representative product is the digital temperature sensor ADT7320, which can achieve high precision of ±0.25°C, supports SPI interface or I2C interface, and has a resolution of up to 16 bits and a very high precision. At the same time, there are over-temperature and under-temperature interrupts inside the chip, and there is a power-saving mode to choose from. The integrated optical module ADPD188B can complete the measurement of smoke, analyze the particle size in the gas to avoid false alarms, and provide protection for fire safety monitoring of various electrical equipment. In addition, ADI also has mature products in environmental sensing technologies such as magnetoresistive technology, ToF and red heat that have developed rapidly in recent years, which can better meet the needs of sensing technology in key applications of the power Internet of Things in the future.
Zhang Songgang also specifically mentioned the mSure self-detection technology launched by ADI, which can conduct direct real-time non-intrusive monitoring of meter accuracy and fault conditions. The meters that support mSure combine cloud analysis services to provide power companies with accurate real-time data and real-time data during the life of the meter. Feasibility analysis, meter failure and advanced electricity theft detection.
A New Discussion on Energy Harvesting Technology and Wireless Network Architecture of Ubiquitous Power Internet of Things

With the further deployment of the ubiquitous power Internet of Things, the power industry has accumulated massive data, which has the characteristics of big data in terms of data volume, diversity, speed and value. To enhance the ability to mine the value of massive data resources, the first thing to solve is the power supply problem. Using power line power supply is expensive, and with the increase of wireless sensor network device nodes, it becomes impractical to lay too many lines. Low-power energy harvesting technology can harvest weak ambient energy and efficiently convert it into electrical energy to power electronic devices. "ADI offers ultra-low power ICs for a variety of energy harvesting applications, such as the ADP5091 for converting photovoltaic energy (solar energy), the LTC3588 for converting vibrational energy (piezoelectric), and the thermal energy (TEC, TEG, thermopile, Power management products such as the LTC3107, which converts thermocouples), can provide high-efficiency conversion to stable voltages, making energy harvesting with micro-power consumption possible." Zhang Songgang said.
ADI's broad range of micropower energy harvesting technologies

In addition, as a general trend of device communication, wireless networking technology is predicted to have more than 30 billion devices capable of wireless communication with other devices by 2020, and the largest proportion of them are low-power wireless LAN devices, especially It is a variety of wireless transceivers in Internet of Things applications. According to Zhang Songgang, wireless networking technology is also used in the field of ubiquitous power Internet of Things, such as cable temperature measurement and dance monitoring of high-voltage power lines, sensor networks in substation environments, or short-distance ad hoc network signal transmission.
In response, ADI has launched the SmartMesh IP network, which consists of a highly scalable self-forming multi-hop wireless node mesh and network manager. The biggest feature is that it achieves a high reliability of 99.999% on the 2.4GHz ISM band. Mesh network, and the power consumption is extremely low (a button battery can be used for 10 years). Each wireless node can send and receive messages (supports bidirectional data) and can also have different data reporting rates. The network manager automatically coordinates each pair of communications to route traffic efficiently and load balances traffic accordingly to extend the time until the network's first battery change. Therefore, this wireless networking technology is very suitable for industrial applications that require high network transmission reliability and want maintenance-free use, and is especially suitable for ubiquitous power Internet of Things deployment. At the same time, ADI also has corresponding solutions in applications such as super capacitors and backup power management.
Typical scenarios of ADI wireless networking solutions for industrial applications

In addition, distribution automation systems are constantly being updated, and smarter electronics are being used to monitor power quality and quickly isolate any faults that affect the overall operation of the grid. Smart terminals, such as DTU/FTU/TTU, are rapidly developing and changing the grid architecture. According to Zhang Songgang, State Grid proposed a new standard for intelligent distribution terminals in the fall of 2018, emphasizing the use of platform-based hardware design and distributed edge computing architecture to support business function realization and flexible expansion in a software-defined manner. "The ADE9078, as a highly accurate fully integrated energy metering device, supports users to develop a three-phase metering platform by interfacing with a current transformer (CT) and a Rogowski coil sensor, and can achieve high performance from Class 1 to Class 0.2 meters. In the new distribution transformer monitoring terminal products of the State Grid, it is being considered for use in intelligent shunt monitoring terminals and intelligent fault sensors, and can also be considered in future intelligent circuit breakers and smart sockets." Zhang Songgang revealed. .
Power distribution IoT senses new demands and ADI's complete signal chain solution