At the beginning of 2019, State Grid proposed to firmly grasp the strategic breakthrough period from 2019 to 2021, and initially build the ubiquitous power Internet of things by 2021; through three-year improvement, the ubiquitous power Internet of things will be built by 2024.
The construction of State Grid ubiquitous power Internet of things will be the first investment in intelligent terminals.
Key technologies and equipment of perception layer of power Internet of things
In the construction of ubiquitous power Internet of things, a large number of sensing devices (such as smart meters, temperature sensors, etc.) need to be laid in the sensing layer, and other terminal products are also needed to realize the functions of data collection, edge computing and communication services.
These terminal products are respectively used in the last kilometer communication network, customer side data collection, line side data collection, station area edge service, substation data collection, terminal mobile service, etc.
1. Non intrusive load identification technology
Non intrusive load identification is a kind of advanced measurement technology that obtains load data (voltage and current) at the input bus end of the user's power load, decomposes the user's power load components through the pattern recognition algorithm, and realizes the sub measurement function.
This technology uses the sensing measurement data and local analysis processing of the intelligent energy meter, and relies on the load model database of the master station, artificial intelligence and machine learning algorithm to complete the measurement of the user's power load type and power consumption.
Typical application scenarios include load forecasting, safe power consumption, smart home, etc.
2. Measurement technology with instrument
As a new sensing technology for the application of residential electrical equipment, it has the functions of electrical parameter measurement, environmental parameter sensing and control strategy output. Generally, two kinds of technical solutions are adopted, which are embedded in the interior of household appliances and intelligent socket with gas metering. This technology and non intrusive compliance is technology complementary multiplication, which is generally realized by customized electrical equipment and smart socket with meter.
3. Application of sensor chip technology
The magnetic sensor chip of the three-phase intelligent electric energy meter can monitor the environmental magnetic field interference, record and report the event of magnetic field stealing in real time. It has been widely recognized by the market; the microcontroller chip for single-phase watt hour meter has been developed and is currently in the stage of verification and test.
4. Advanced application technology of mining based on HPLC
The in-depth application of high-speed power line carrier communication (HPLC) technology mainly includes eight advanced application functions: high-frequency data acquisition, power outage active reporting, clock precise management, phase topology identification, automatic identification of station area, unified ID identification management, automatic file synchronization, communication performance detection and network optimization. These functions support the multi-dimensional distributed energy access, the collection and monitoring of electric vehicle charging piles, the fine analysis of line loss in the station area, and the check of operation and distribution through archives.
5. Dual mode communication technology based on HPLC
HPLC based dual-mode communication technology can be applied to carrier communication blind spot scene, wireless communication blind spot scene and dual-mode fusion communication scene Smart city, electric vehicle charging pile remote monitoring and billing, distributed renewable energy access and monitoring, building control system, industrial power distribution and remote monitoring, make use of the complementary characteristics of HPLC and wireless, improve the coverage of access network communication, and improve the new business support capacity of smart grid.
6. Intelligent monitoring technology of electricity meter
During the long-term operation of the electric energy meter, the amplitude and phase error changes may be caused by power stealing, fault, aging or failure, or the temperature of the terminal block of the electric energy meter is too high due to the long-term over-current operation.
In the new generation of intelligent energy meter design scheme, the error self-monitoring function and terminal block temperature measurement function are added: through the error self-monitoring function, the abnormal measurement can be found and reported in time, forming the monitoring time record and freezing; the terminal block temperature measurement function can realize the abnormal phenomenon in real time by measuring the temperature of the terminal block of the energy meter, and accurately alarm, pull the brake protection and event the on-site situation Record and actively report.
7. Comprehensive energy measurement and perception technology
Comprehensive energy measurement and sensing technology makes full use of power information collection system, equipment and communication resources to build an open and shared data platform.
The device sensing layer covers various types of energy meters, environmental monitoring devices and measurement sensing sensors; the network communication layer can support the use of HPLC, RF, Bluetooth, ZigBee, WiFi, M-BUS, RS-485 And build the interconnection protocol stack to support the object-oriented communication protocol, as well as all kinds of energy meters and measurement sensing devices, to realize the plug and play of devices.
8. Orderly charging technology of electric vehicle
Orderly charging of electric vehicles means that users apply for charging and discharging business through app, and the master station issues instructions to the charging post at the designated time point according to the designated charging plan, so as to realize the control of charging start and stop of electric vehicles and the regulation of real-time power limit.
9. On line monitoring technology of power transformer
According to the operation error evaluation method and model of power transformer, the on-line monitoring device of power transformer standardizes the type evaluation, on-site verification and operation management mode of power transformer, improves the inspection, operation and maintenance and management level of power transformer, directly serves the power trade settlement, and carries out refined line loss analysis.
Ubiquitous power Internet of things consumer solutions
Lot electric cloud helps the State Grid platform to build a "cloud edge collaboration" architecture, realize the interconnection of resources and data such as power distribution and comprehensive energy, and build a reliable, open and converged IOT system.
On the other hand, on the consumer side
