Synchronized phasor measurement method, system and related components

Abstract

The application discloses a synchronized phasor measurement method, system and related components, including: collecting power signals, adding the absolute time scale output by the 5G clock to the power signals; obtaining the amplitude-frequency response curve of the power signal; determining the power signal according to the amplitude-frequency response curve The state of the power signal, the state includes an attenuated DC component, and / or contains an interharmonic component or a harmonic component, and / or contains an amplitude modulation signal and / or a phase angle modulation signal; the power signal is calculated by an algorithm corresponding to the state The fundamental phasor parameters of . This application uses 5G with superior communication performance such as short delay, high reliability, high-precision time synchronization, and extremely high bandwidth for data transmission and time synchronization, which can meet the requirements of the distribution network synchrophasor measurement device for transmission. The delay requirement saves the input of GPS and optical fiber and other communication inputs, thereby saving the cost of synchrophasor measurement devices, high measurement accuracy, and improving the application effect of advanced applications of wide-area measurement, control and protection of distribution networks.

Description

technical field [0001] The present application relates to the field of distribution network, in particular to a synchronized phasor measurement method, system and related components. Background technique [0002] The synchrophasor measurement device can be used in the fields of dynamic monitoring, system protection, system analysis and prediction of the power system, and is an important equipment to ensure the safe operation of the power grid. During the popularization and application of the synchrophasor measurement device in the distribution network, it is easy to encounter the following problems: First, the synchrophasor measurement device needs to have a built-in GPS module, or install a GPS (Global Positioning System, Global Positioning System) device on site, and the cost At the same time, it is difficult for the GPS antenna to be unobstructed during on-site installation, resulting in poor GPS signals and the inability to achieve high-precision time synchronization. T...

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Problems solved by technology

During the popularization and application of the synchrophasor measurement device in the distribution network, it is easy to encounter the following problems: First, the synchrophasor measurement device needs to have a built-in GPS module, or install a GPS (Global Positioning System, Global Positioning System) device on site, and the cost At the same time, it is difficult for the GPS antenna to be unobstructed during on-site installation, resulting in poor GPS signals and the inability to achieve high-precision time synchronization. The investment cost of optical fiber is high. In this case, the current synchrophasor measurement device has a built-in 4G module. In the actual application process on site, the signal stability of the 4G module is poor, and there is a certain packet loss rate. The bandwidth requirements for uploading, and the transmission delay fluctuates greatly and the delay is long, which makes it difficult to meet the requirements of the distribution network for closed-loop real-time control, and affects the application effect of the advanced application functions of the master station; the third is due to the current distribution network power electronics There are many devices, which lead to large distortion of the voltage and current signals of the distribution network. The current synchronized phasor measurement algorithm cannot handle the influence of harmonics, interharmonics, attenuated DC components, amplitude modulation and phase angle modulation at the same time, resulting in distribution During the dynamic process of the power grid, the measurement accuracy of the synchronized phasor is poor, which affects the application effect of the advanced application of wide-area measurement, control and protection of the distribution network

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