10kV distribution network high-voltage metering device based on electronic-type sensor

[0028] In order to better understand the present invention, we will further elaborate the present invention below in conjunction with specific examples.

[0029] like figure 1 As shown, the 10kv distribution network high-voltage metering device in the present invention is connected to the output end of the electronic sensor, and the measuring unit is connected to the voltage and current signal interface of the electronic sensor, and the small signal of 1.876v output by the primary side electronic voltage transformer Further conditioning to form a 0.2v signal, while further conditioning the 1v small signal output by the primary side electronic current transformer to form a 0.2v signal, and conditioning this 0.2v single-ended small signal into a complete differential signal input to the metering circuit, And output to the data processing unit through the pulse output circuit, after being processed by the CPU core circuit, the data is connected to the power distribution automation system through the RS485 interface circuit and RS232 interface circuit in the communication unit through the DL/T 634.5101-2002 transmission protocol, and the power The energy metering data is transmitted to the distribution automation master station system.

[0030] Among them, the measurement unit-signal conditioning circuit diagram refers to figure 2 , measuring unit - metering circuit diagram refer to image 3 , measurement unit - pulse output circuit diagram refer to Figure 4 , data processing unit-CPU core circuit diagram refer to Figure 5 , data processing unit - power supply circuit diagram refer to Image 6 , data processing unit-storage circuit diagram refer to Figure 7 , communication unit - RS485 interface circuit diagram refer to Figure 8 , communication unit RS232 interface circuit diagram refer to Figure 9.