What core technologies do power sensors need to break through?
The power sensor is the tentacle for the grid to obtain various data and parameters. On July 13, 2019, a large-scale blackout occurred in New York, USA. At least 70,000 residents and commercial users were affected by the blackout. The blackout lasted about 5 hours. In the end, the investigation revealed that it was caused by defects in the connection between some power sensors and relay protection equipment in the city's substation.
The above cases can give a glimpse of the importance of the inconspicuous monitoring terminal such as power sensors to the power grid. Recently, in the construction of the energy Internet, power sensors can effectively support the application of the energy Internet.
Specifically, in different applications, different power sensors are needed.
1. In the power generation process, especially wind power, photovoltaic and other new energy power generation, various sensors such as temperature, optics, inclination, speed, image and position need to be used to ensure the fault diagnosis and health monitoring of power generation equipment and prevent accidents;
2. In the links of power transmission, transformation and power distribution, it is necessary to use micro weather, tower tilt, icing, galloping, sag, wind deviation, partial discharge, dielectric loss, insulating gas, leakage current, vibration and pressure, etc. A variety of sensors and intelligent terminals to realize the collection of electrical main equipment status, environment and other auxiliary information;
3. In the link of electricity consumption, for application scenarios such as smart electricity, electric vehicles, smart homes, etc., sensors and measuring devices such as power quality, load monitoring, image and video are used to support the full utilization of demand-side flexible load resources and compensate for energy In the Internet, system operation problems such as frequency fluctuations caused by insufficient DC inertia or imbalance between supply and demand, while improving energy efficiency.
at the moment, the core technologies that power sensors need to break through are mainly concentrated in the following four areas:
1. Breakthrough in power sensing materials and device technology.
Develop AC and DC electrical quantity sensors to meet the needs of DC measurement and power quality; cultivate low-cost, highly reliable, current, partial discharge, gas, and vibration optical sensor components that can be integrated with primary equipment; accelerate surface acoustic wave, infrared and Development of non-contact temperature sensors such as thermopile.
2. Research and develop low-power, broadband-narrow-integrated wireless sensor network protocols and products to meet the needs of power perception, taking into account ultra-low power consumption, bandwidth and other indicators; establish wireless sensor network interconnection and interoperability based on consistent communication protocols and evaluation methods Evaluation system to solve the compatibility of products and agreements of different suppliers and various performance evaluation issues.
3. It has the characteristics of rapid response for power perception applications, forming an intelligent analysis technology platform, and realizing "sensing + local analysis". Based on the "platform + application" model, it deeply integrates perception, measurement, and control to solve the fragmentation problem of power smart sensor technology and applications.
4. Master sensor energy and integrated packaging and testing technology.
Research the application and optimization of environmental micro-energy collection technology, and research and develop energy acquisition devices integrated with power sensors. According to the power system's strong electromagnetic interference and other working conditions, the integrated design is carried out, and the intelligent sensor integrating sensing, communication, calculation, safety and energy acquisition is developed to form a series of products, and establish a weather resistance and reliability test verification system .
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