Source: Science and Technology Daily Author: Hua Ling
Recently, the award results of 2022 Electric Power Innovation Award were officially announced. Among them, Lei Min, Yin Xiaodong and others of China Electric Power Research Institute Co., Ltd. applied for the "key technology and application of smart grid digital metering system" technical achievements, which won the first prize of the Electric Power Innovation Award.
As the basic sensing node of power grid voltage, current and electric energy, the metering system is the basis and an important part of the digital transformation of power grid. With the development of smart grid, the measurement system has insufficient reliable measurement capability, and the data fusion application efficiency is low. It is difficult to support the demand for massive and accurate measurement data in the digital transformation of power grid. It is urgent to overcome the key technologies of the digital measurement system of power grid.
It is understood that China Electric Power Research Institute Co., Ltd. has set up a digital measurement technology research team since 2012 to carry out technical innovation in the three aspects of measurement system architecture, measurement traceability system, and data fusion application, propose a self-calibration digital centralized measurement system architecture, and overcome the real-time self-monitoring and self-calibration problem of system-level measurement data; The digital quantity value traceability method based on quantum technology and the "mode Hermite" transient verification method are proposed, and the traceability accuracy is greatly improved; The electric energy analysis technology based on high-speed synchronous sampling and logic judgment of power flow distribution has been invented to realize accurate measurement of electric energy with wide dynamic range and fast time variation in power system. As a result, it has promoted the establishment of a digital measurement traceability system in China to provide accurate measurement values for high voltage measurement in power, railway, aerospace and other industries.
At present, relying on the results of the project, the research team has carried out measurement value transmission and on-site detection in the national medical research institutes, military enterprises, manufacturing enterprises and power grids, and unified the national measurement value; Support the construction of major projects such as the Zhangbeirouzhi Project, the construction of the Shanghai World Expo Park, the ± 1100kV DC transmission and the digital metering system of the national intelligent substation, and effectively ensure the safe, stable and economic operation of major projects in China; It has been popularized and applied by users in large metallurgical industries such as Shaanxi Meixin and Shanxi Yangquan. It is the first time in China to realize digital measurement trade settlement and promote the legalization of digital measurement system. At the same time, the results of the project have been promoted and applied in Brazil, Pakistan, Türkiye and other countries.
Editor in charge: Chen Kexuan
