Multi-channel low-voltage shunt monitoring device based on HPLC (High Performance Liquid Chromatography) communication and topology identification method

A monitoring device and multi-channel technology, applied in the direction of circuit devices, battery circuit devices, transportation and packaging, etc., to achieve the effects of dynamic topology recognition, improved monitoring level, lean management level and power supply reliability

CN114614564APending Publication Date: 2022-06-10NANJING NARI GROUP CORP +1
0 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-06-10

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a multichannel low-voltage shunt monitoring device based on HPLC (High Performance Liquid Chromatography) communication and a topology identification method. The device comprises an MCU (Microprogrammed Control Unit), a current acquisition circuit, a voltage acquisition circuit, a voltage comparison circuit, an RS485 interface and an HPLC (High Performance Liquid Chromatography) module, and the MCU of the device receives a switching instruction through the HPLC module and controls a load capacitor to switch according to the switching instruction; when the load capacitor is switched, a load switching characteristic signal is generated and transmitted to the power line, so that the characteristic signal detection circuit at the upper level detects the characteristic signal from the power line, and the upper-lower level relation of the whole topology is obtained. According to the invention, the digital transformation of the stock low-voltage distribution line can be realized, the topology dynamic identification of the low-voltage line is realized, and the monitoring level of the low-voltage line is improved.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a multi-channel low-voltage shunt monitoring device and a topology identification method based on HPLC communication, and belongs to the technical field of low-voltage platform area monitoring. Background technique

[0002] At present, most low-voltage station areas do not have the real-time collection function of line operation status. In some low-voltage station areas, only the main outgoing line of the power distribution room and the first-level branch are equipped with local or remote meters. Using ordinary molded case circuit breakers without communication functions for overcurrent protection, the operating status of low-voltage lines cannot be collected in real time for the full topology. In addition, due to the large number of terminal users of low-voltage distribution lines in the station area, the topological relationship of the low-voltage line is also changing with the development of society, resulting in deviations ...

Examples

Embodiment

[0030] The dynamic topology recognition method adopted by the device involved in the present invention is as follows: image 3 As shown, the diagram shows a typical power supply topology of low-voltage station areas, and the transformer supplies power to the load through multiple branches. The hollow circles and solid circles in the figure represent the devices involved in the present invention. When the device 4-1 generates a characteristic signal through the switching of the capacitor, the signal will be transmitted along the topological structure to the power supply direction (that is, the upstream of the topology), that is, the device 4-0, 2-1, 2-0, 1-1 , 1-0 (that is, the solid circle in the figure) can detect the characteristic signal, but other devices (that is, the hollow circle in the figure) cannot detect the characteristic signal, so it can be judged that the solid circle is located in 4-1 topologically upstream. By sequentially controlling each device to send a ch...