CN211045250U

CN211045250U - Current transformer based on wireless communication technology networking

Info

Publication number: CN211045250U
Application number: CN201922171372.1U
Authority: CN
Inventors: 王军; 侯帅; 张骞予; 王宏艳
Original assignee: MCC Tiangong Group Corp Ltd
Current assignee: MCC Tiangong Group Corp Ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2020-07-17
Anticipated expiration: 2029-12-06

Abstract

The utility model discloses a current transformer based on wireless communication technology networking, which relates to the technical field of electric power systems, and comprises a current transformer, a main winding and an auxiliary winding which are wound on the current transformer, wherein the auxiliary winding is electrically connected with the input end of a secondary current acquisition and conversion module, and the output end of the secondary current acquisition and conversion module is electrically connected with a wireless communication transmitting module through a processor I; the wireless communication transmitting module is in communication connection with the wireless communication receiving module; the wireless communication receiving module is electrically connected with the input end of the circuit restoring module through the processor II, and the output end of the circuit restoring module is electrically connected with a measuring or protecting circuit of measuring or protecting equipment. The utility model discloses the cost of current transformer's secondary wiring has been practiced thrift to solved that current transformer wiring is many, transmission distance is far away, the signal easily receives the problem of interference.

Description

Current transformer based on wireless communication technology networking

Technical Field

The utility model relates to an electric power system technical field, concretely relates to current transformer based on wireless communication technology network deployment.

Background

The current transformer is an important component of the electric power transmission and transformation equipment, is a communication element of a primary system and a secondary system of electric power, and is essential in the electric power system. In order to meet the requirements of devices such as a measuring instrument, relay protection, breaker failure judgment, fault filtering and the like, current transformers with 2-8 secondary windings are arranged in loops such as a generator, a transformer, an outgoing line, a bus section breaker, a bus breaker, a bypass breaker and the like.

At present, the signal transmission from the secondary winding of the current transformer to the measurement or protection equipment adopts a cable connection mode, as shown in fig. 1. The field wiring has the characteristics of more cables, long transmission distance, easy signal interference and the like, and no current transformer for transmitting secondary winding signals through a wireless communication technology exists in the market, so that the current transformer based on the wireless communication technology networking is necessary to be manufactured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a current transformer based on wireless communication technology network deployment has solved the problem that current transformer wiring is many, transmission distance is far away, the signal easily receives the interference.

A current transformer based on wireless communication technology networking comprises a current transformer, a main winding and an auxiliary winding, wherein the main winding and the auxiliary winding are wound on the current transformer, the auxiliary winding is electrically connected with an input end of a secondary current acquisition and conversion module, and an output end of the secondary current acquisition and conversion module is electrically connected with a wireless communication transmitting module through a processor I; the wireless communication transmitting module is in communication connection with the wireless communication receiving module; the wireless communication receiving module is electrically connected with the input end of the circuit restoring module through the processor II, and the output end of the circuit restoring module is electrically connected with a measuring or protecting circuit of measuring or protecting equipment.

The secondary current acquisition and conversion module comprises a current-voltage conversion module and an AD conversion module, and the secondary winding is electrically connected with the input end of the current-voltage conversion module; the output end of the current-voltage conversion module is connected with one end of the AD conversion module, and the other end of the AD conversion module is electrically connected with the processor I.

The circuit reduction module comprises a DA conversion module and a current generation module, wherein the input end of the DA conversion module is electrically connected with the processor II, and the output end of the DA conversion module is electrically connected with one end of the current generation module; and the other end of the current generation module is electrically connected with a measuring or protecting device.

The wireless communication transmitting module comprises a 4G, 5G, Wi-Fi, RFID, ZigBee or Bluetooth signal transmitter.

The wireless communication receiving module comprises a 4G, 5G, Wi-Fi, RFID, ZigBee or Bluetooth signal receiver.

The utility model has the advantages that:

the current signal output by the secondary winding of the current transformer is converted into a digital signal and is accessed to a wireless communication network through a wireless communication transmitting module; the wireless communication receiving module receives the wireless signals and then processes the signals, and the circuit restoring module restores the signal current to finish current measurement and power system protection.

The wireless signal transmission saves the cost of secondary wiring of the current transformer and solves the problems of more wiring, long transmission distance, easy signal interference and the like of the current transformer; additionally, the utility model discloses still have the characteristics that current collection fail safe nature is high, wireless communication technology network deployment transmission signal's function has filled market blank, has very big market using value.

Drawings

Fig. 1 is a schematic structural diagram of the prior art.

Fig. 2 is a schematic connection diagram of the present invention.

Fig. 3 is a schematic block diagram of the current transformer, the secondary current acquisition and conversion module, and the wireless communication transmission module.

Fig. 4 is a schematic block diagram of a wireless communication receiving module, a circuit restoring module, and a measurement or protection device.

The device comprises a current transformer 1, a main winding 2, an auxiliary winding 3, a measuring or protecting device 4, a secondary current acquisition and conversion module 5, a wireless communication transmitting module 6, a wireless communication receiving module 7 and a circuit restoring module 8.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

A current transformer based on wireless communication technology networking is disclosed, as shown in figure 2, and comprises a current transformer 1, a main winding 2 and an auxiliary winding 3 wound on the current transformer 1, wherein the auxiliary winding 3 is electrically connected with an input end of a secondary current acquisition and conversion module 5, and an output end of the secondary current acquisition and conversion module 5 is electrically connected with a wireless communication transmitting module 6 through a processor I; the wireless communication transmitting module 6 is in communication connection with the wireless communication receiving module 7; the wireless communication receiving module 7 is electrically connected with the input end of the circuit restoring module 8 through the processor II, and the output end of the circuit restoring module 8 is electrically connected with the measuring or protecting circuit of the measuring or protecting device 4.

The processor I processes the signals and assists in controlling the data signals sent or transmitted by the wireless network; the wireless communication transmitting circuit has the functions of converting data which are processed by the processor I and need to be transmitted through a wireless network into wireless communication signals to be transmitted, ensuring that the wireless communication signals conform to communication protocols of corresponding networks, and supporting multiple network forms such as 4G, 5G, Wi-Fi, RFID, ZigBee, Bluetooth and the like. The processor II processes the wireless signal received by the wireless communication receiving module 7, processes the signal and synchronously controls the circuit restoring module 8.

As shown in fig. 3, the secondary current collecting and converting module 5 includes a current-voltage converting module and an AD converting module, and the secondary winding 3 is electrically connected to an input end of the current-voltage converting module; the output end of the current-voltage conversion module is connected with one end of the AD conversion module, and the other end of the AD conversion module is electrically connected with the processor I. The current and voltage conversion module converts a current signal generated by a secondary winding of the current transformer into a voltage signal meeting the requirement of the AD conversion module; the AD conversion module converts the voltage signal converted by the current-voltage conversion module into a digital signal and sends the digital signal to the processor I.

As shown in fig. 4, the circuit restoring module 8 includes a DA conversion module and a current generating module, an input end of the DA conversion module is electrically connected to the processor II, and an output end of the DA conversion module is electrically connected to one end of the current generating module; the other end of the current generating module is electrically connected to a measuring or protection device 4. The DA conversion module converts the digital signal into a voltage signal; the current generation module is used for reducing the voltage signal generated by the DA conversion module into the current of the secondary winding of the current transformer 1 so as to ensure that the current signal is the same as the current signal of the secondary winding of the current transformer 1.

The wireless communication transmitting module 6 comprises a 4G, 5G, Wi-Fi, RFID, ZigBee or Bluetooth signal transmitter; the wireless communication receiving module 7 comprises a 4G, 5G, Wi-Fi, RFID, ZigBee or Bluetooth signal receiver. The wireless communication transmitting module 6 and the wireless communication receiving module 7 can be accessed to various networks such as a mobile communication network, an Ethernet network, a wireless local area network and the like. The wireless communication network can be in various network forms such as 4G, 5G, Wi-Fi, RFID, ZigBee, Bluetooth and the like, and not only one-to-one networking but also multi-node networking should be supported.

In practical application, the secondary current acquisition and conversion module and the wireless communication transmitting module can be integrated with the current transformer 1, and the secondary current acquisition and conversion module and the wireless communication transmitting module can also be electrically connected with the current transformer module; the wireless communication receiving module and the circuit restoring module can also be synchronously integrated in the measuring or protecting equipment, and the wireless communication receiving module and the circuit restoring module can also be connected with the measuring or protecting equipment after being integrated.

In this embodiment, the models of the processor I and the processor II are TIcc 320.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of the invention or which are equivalent to the scope of the invention are embraced by the invention.

Claims

1. A current transformer based on wireless communication technology networking comprises a current transformer (1), a main winding (2) and an auxiliary winding (3) wound on the current transformer (1), and is characterized in that the auxiliary winding (3) is electrically connected with an input end of a secondary current acquisition and conversion module (5), and an output end of the secondary current acquisition and conversion module (5) is electrically connected with a wireless communication transmitting module (6) through a processor I; the wireless communication transmitting module (6) is in communication connection with the wireless communication receiving module (7); the wireless communication receiving module (7) is electrically connected with the input end of the circuit restoring module (8) through the processor II, and the output end of the circuit restoring module (8) is electrically connected with a measuring or protecting circuit of the measuring or protecting equipment (4).

2. The wireless communication technology networking based current transformer according to claim 1, wherein the secondary current acquisition and conversion module (5) comprises a current-voltage conversion module and an AD conversion module, and the secondary winding (3) is electrically connected with an input end of the current-voltage conversion module; the output end of the current-voltage conversion module is connected with one end of the AD conversion module, and the other end of the AD conversion module is electrically connected with the processor I.

3. The wireless communication technology networking based current transformer according to claim 1 or 2, wherein the circuit restoration module (8) comprises a DA conversion module and a current generation module, an input end of the DA conversion module is electrically connected with the processor II, and an output end of the DA conversion module is electrically connected with one end of the current generation module; the other end of the current generating module is electrically connected with a measuring or protecting device (4).

4. The wireless communication technology networking based current transformer according to claim 3, wherein the wireless communication transmitting module (6) comprises a 4G, 5G, Wi-Fi, RFID, ZigBee or Bluetooth signal transmitter.

5. The wireless communication technology networking based current transformer according to claim 1 or 4, wherein the wireless communication receiving module (7) comprises a 4G, 5G, Wi-Fi, RFID, ZigBee or Bluetooth signal receiver.