Feeder terminal device and signal acquisition calculation and line selection method thereof

Abstract

The invention relates to a feeder terminal device, which comprises a front-end signal acquisition module, an analog-to-digital conversion module and a data reading module, which are connected in sequence; the front-end signal acquisition module converts acquired low-voltage and low-current signals into small-voltage signals; the analog-to-digital conversion module is provided with eight channels,a 16-bit parallel data reading mode is adopted, the signal acquisition frequency is more than 6 kHZ, and the data reading module is configured with a 16-bit wide data bus. The invention also relates to a signal acquisition and line selection method based on the feeder terminal. On the basis of a traditional acquisition circuit, a front-end acquisition circuit is optimized, an AD chip with higher performance is selected, and a 16-bit parallel bus is adopted to read data, so that the acquisition precision and rate are improved, the quantization error is reduced, the semaphore is accurately acquired, and the sampling rate is increased. According to the method, the defects of limitation of application to specific working conditions and easy maloperation are avoided, and the wavelet line selection method with higher accuracy and reliability is selected.

Description

technical field [0001] The invention belongs to the technical field of feeder terminal equipment, and in particular relates to a feeder terminal device with high-precision and high-speed signal acquisition and a method for signal acquisition calculation and line selection thereof. Background technique [0002] The feeder terminal device is a distribution network automation terminal product developed for pole-mounted switches, and is the preferred supporting model for various types of pole-mounted switch automation. The feeder terminal device is responsible for the collection of switching and measuring quantities of switchgear such as switches on the pole. After processing, it realizes fault identification, fault location, and fault isolation of the feeder line; it reports to the superior master station or sub-station according to the communication protocol, and Accept orders issued by the superior master station or sub-station. [0003] With the development of the power mar...

AI Technical Summary

Problems solved by technology

The existing feeder terminal devices have been unable to meet the actual needs in terms of the accuracy and speed of signal acquisition

Images