Signal acquisition device for power distribution room

Abstract

The utility model provides a signal acquisition device for a power distribution room, and the device is characterized in that a sensor is used for collecting the working current and voltage information of a motor and transmitting the information to a motor protector; the motor protector is used for collecting working state parameter information of the motor, converting the collected working state parameter information and voltage and current information collected by the sensor and then sending the information to the collection module. The acquisition module is used for converting and sending information sent by the motor protector; the PLC is used for receiving and transmitting control; the electro-optical conversion module is used for converting a signal sent by the PLC into an optical signal; the photoelectric conversion module is used for receiving the optical signal, converting the optical signal into an electric signal and sending the electric signal to the DCS cabinet. According to the utility model, a target signal of a power distribution room motor is collected and converted into an optical signal, and the optical signal can be sent to the DCS cabinet through one optical fiber, so that the cable purchase cost and a large amount of manual cable laying cost are greatly saved, remote debugging is carried out through the communication gateway, repeated reciprocating is not needed, and the on-site debugging cost is also saved.

Description

Technical Field

[0001] This utility model relates to the field of power, and in particular to a signal acquisition device for a power distribution room. Background Technology

[0002] A power distribution room is an indoor power distribution area with low-voltage loads, mainly distributing electricity to low-voltage users. It is equipped with medium-voltage incoming lines (and may have a few outgoing lines), distribution transformers, and low-voltage distribution equipment. It includes facilities for equipment with voltage levels of 10kV and below. The DCS control room is equipped with a DCS (distributed control system), which is a distributed control system consisting of multiple computers and dedicated control software connected through a communication network.

[0003] In reality, the distance between the power distribution room and the DCS control room is quite far, generally around 500 meters. If hard-wiring is used, each signal requires a separate cable, and the material and construction costs can reach tens to hundreds of thousands of yuan. In addition, when debugging the motors in the power distribution room, multiple trips to the power distribution room are required, and the debugging time is also quite long. Summary of the Invention

[0004] In order to solve the problems existing in the background art, this utility model proposes a signal acquisition device for power distribution rooms.

[0005] A signal acquisition device for a power distribution room, comprising:

[0006] The sensor is configured to connect to the motor protector to collect current and voltage information of the motor and send it to the motor protector.

[0007] The motor protector is configured to connect to the acquisition module to collect the motor's operating status parameters and convert the collected operating status parameters and the voltage and current information collected by the sensors before sending them to the acquisition module.

[0008] The data acquisition module is configured to connect to the PLC controller and is used to convert and transmit the information sent by the motor protector.

[0009] The PLC controller is configured to connect to the electro-optical conversion module for transmitting and receiving control.

[0010] An electro-optical conversion module is configured to connect to a PLC controller and is used to convert signals sent by the PLC controller into optical signals.

[0011] The photoelectric conversion module is configured to connect to the electro-optical conversion module and the DCS cabinet via optical fiber. It is used to receive optical signals, convert them into electrical signals, and then send them to the DCS cabinet.

[0012] Based on the above, a communication gateway is configured to connect to a PLC controller, and the PLC controller wirelessly connects to the control terminal through the communication gateway.

[0013] Based on the above, there is a bidirectional communication connection between the PLC controller and the acquisition module, and between the acquisition module and the motor protector.

[0014] Based on the above, the acquisition module communicates with the PLC controller via an RS485 communication interface.

[0015] This utility model has substantial features and progress compared to the prior art. Specifically, this utility model collects the target signal of the motor in the power distribution room and converts it into an optical signal, which can be sent to the DCS cabinet through a single optical fiber. This greatly saves on cable procurement costs and the cost of laying cables manually. In addition, remote debugging is performed through a communication gateway, eliminating the need for multiple trips and saving on-site debugging costs. Attached Figure Description

[0016] Figure 1 and Figure 2 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1 and Figure 2 As shown, a signal acquisition device for a power distribution room includes: a sensor configured to connect to a motor protector, used to acquire current and voltage information of the motor operation and send it to the motor protector; a motor protector configured to connect to an acquisition module, used to acquire motor operating status parameter information, and convert the acquired operating status parameter information and the voltage and current information acquired by the sensor before sending it to the acquisition module; an acquisition module configured to connect to a PLC controller, used to convert and send the information sent by the motor protector; a PLC controller configured to connect to an electro-optical conversion module, used for transceiver control; an electro-optical conversion module configured to connect to the PLC controller, used to convert the signal sent by the PLC controller into an optical signal; and a photoelectric conversion module configured to connect to the electro-optical conversion module via optical fiber and to a DCS cabinet, used to receive the optical signal, convert it into an electrical signal, and send it to the DCS cabinet.

[0019] In practice, this also includes a switching power supply module, used to connect to the power supply in the distribution room, and after power conversion, provide operating power to the PLC controller and acquisition module. Sensors are current and voltage sensors used to collect the motor's operating current and voltage. The motor protector is an existing motor protector with an internal microcontroller and conversion module, used to collect information on the motor's operating status such as overcurrent, undercurrent, phase loss, locked rotor, short circuit, overvoltage, undervoltage, and leakage. The conversion module converts the collected motor operating status information and the voltage and current information sent by the sensors into a unified standard signal and sends it to the acquisition module. The acquisition module converts the signal sent by the motor protector into high and low levels and sends it to the PLC controller. The PLC controller controls the electro-optical conversion module to perform electro-optical signal conversion, and then sends it through optical fiber to the photoelectric conversion module. The photoelectric conversion module converts the received optical signal into an electrical signal and then sends it to the DCS control system in the DCS cabinet. Finally, the upper computer in the DCS control room performs control and display. After collecting the target signal of the motor in the power distribution room, it is converted into an optical signal and sent to the DCS cabinet through a single optical fiber, which greatly saves the cost of cable procurement and a large amount of manual cable laying.

[0020] In practice, electrical distribution rooms and DCS cabinets typically have multiple terminal blocks for easy cable connections, avoiding extensive wiring. The data acquisition module communicates with the PLC controller via an RS485 communication interface.

[0021] Preferably, the power distribution room signal acquisition device further includes a communication gateway configured to connect to the PLC controller. The PLC controller wirelessly connects to the control terminal via the communication gateway. In this embodiment, there is bidirectional communication between the PLC controller and the acquisition module, and between the acquisition module and the motor protector. The PLC controller wirelessly connects to the control terminal via a wireless network, mainly for remote debugging. The control terminal can be a mobile phone, tablet, etc. After receiving the remote debugging information, the PLC controller caches and verifies it, and then sends it to the microcontroller of the motor protector through the acquisition module for corresponding debugging control and feedback.

[0022] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A signal acquisition device for a power distribution room, characterized in that, include: The sensor is configured to connect to the motor protector to collect current and voltage information of the motor and send it to the motor protector. The motor protector is configured to connect to the acquisition module to collect the motor's operating status parameters and convert the collected operating status parameters and the voltage and current information collected by the sensors before sending them to the acquisition module. The data acquisition module is configured to connect to the PLC controller and is used to convert and transmit the information sent by the motor protector. The PLC controller is configured to connect to the electro-optical conversion module for transmitting and receiving control. An electro-optical conversion module is configured to connect to a PLC controller and is used to convert signals sent by the PLC controller into optical signals. The photoelectric conversion module is configured to connect to the electro-optical conversion module and the DCS cabinet via optical fiber. It is used to receive optical signals, convert them into electrical signals, and then send them to the DCS cabinet.

2. The power distribution room signal acquisition device according to claim 1, characterized in that: Includes a communication gateway configured to connect to a PLC controller, through which the PLC controller wirelessly connects to the control terminal.

3. The power distribution room signal acquisition device according to claim 2, characterized in that: Two-way communication connection between the PLC controller and the acquisition module, and between the acquisition module and the motor protector.

4. The power distribution room signal acquisition device according to claim 1, characterized in that: The data acquisition module communicates with the PLC controller via an RS485 communication interface.

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