Multifunctional analog quantity unified acquisition module for transformer substation

Abstract

The invention discloses a multifunctional analog quantity unified acquisition module for a transformer substation. The unified acquisition module comprises a high-speed bus backboard, a central processing unit (CPU) module, an analog quantity input module and a power supply module. The CPU module, the analog quantity input module and the power supply module are all connected with the high-speed bus backboard. The multifunctional analog quantity unified acquisition module converts voltage and current conventional sampling input and digital sampling input signals of a power grid into digital signals of various frequencies for output, and can meet requirements of spacing layer equipment. According to different requirements of devices such as a measurement and control device, a protection device, an oscillograph, an electric energy quality device, a power system synchronous phasor measurement device (PMU), a metering device and a broadband measurement device on the sampling rate, unified sampling of analog quantities of different measurement devices of a transformer substation is realized, the data sharing degree of the transformer substation is improved, and the standardization, standardization and accuracy of sampling of the transformer substation are improved.

Description

technical field [0001] The invention relates to a substation measurement technology, in particular to a multifunctional analog quantity unified acquisition module of a substation. Background technique [0002] With the continuous development of the grid scale and the large-scale access of distributed energy, DC control devices, and reactive power compensation devices, China's power grid has developed into a super-large-scale complex power grid. High-order harmonic interference and subsynchronous oscillation in the power grid become more frequent. It is urgent to improve the monitoring ability of the power grid for different frequency disturbance components and reduce the risk of power grid operation. In order to monitor higher harmonics and inter-harmonics, the measuring device is required to have a higher sampling frequency. For example, the gateway metering device requires a sampling frequency not lower than 12.8kHz; the power quality and broadband measuring device requir...

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