WO2008058420A1

WO2008058420A1 - Remote monitoring management system of electric power device

Info

Publication number: WO2008058420A1
Application number: PCT/CN2006/003044
Authority: WO
Inventors: Bingren Zhou; Gang Chen; Bin Zhou; Baoliang Li
Original assignee: Bingren Zhou; Gang Chen; Bin Zhou; Baoliang Li
Priority date: 2006-11-13
Filing date: 2006-11-13
Publication date: 2008-05-22
Also published as: BRPI0622004A2

Abstract

A remote monitoring management system of electric power device includes a radio acquisition device and a data converter. The radio acquisition device consists of a current transformer, a wide current constant-voltage converting circuit, a current sampling circuit, an AC A/D acquisition unit, an AVR main control unit, a temperature sensor, a temperature measuring circuit and a radio transmitting and receiving circuit. The data converter consists of a radio transmitting and receiving circuit, a hardware clock circuit, an AVR main control unit, a RS485 data communication interface and a voltage regulation power supply. The radio transmitting and receiving circuit includes a radio receiving circuit and a radio transmitting circuit, and adopts GFSK modulation, and has the transmitting and receiving frequency of 433MHz, or 868MHz, or 915MHz. The system implements monitor of the high-voltage device locally, in time and quantificationally, and can be easily applied to the remote control system.

Description

Power equipment remote monitoring management system

Technical field

The present invention relates to a wireless acquisition system, and in particular to a remote monitoring and management system for a power device. It can be applied to remote monitoring of high-voltage side measuring equipment and communication and remote control of high-voltage side equipment.

Background technique

The monitoring of high-voltage equipment is an important part of the automation management of the power sector. The collection of the working state of the high-voltage equipment is the most critical part. At present, the monitoring of the connection status of high-voltage equipment can only be judged by indirect analysis of the state of the back-end equipment. The current of the high-voltage circuit loop can only be measured indirectly at the back end by using a dedicated meter. In short, the collection of existing working conditions of electric high-voltage equipment is mostly indirect, or not quantitative and timely, and becomes a bottleneck for improving the level of power automation management.

In the prior art, the Chinese patent ZL200520069378.3, the utility model name "Wireless High Voltage Device Wireless Collector" relates to a wireless high-voltage device wireless acquisition system, which comprises a current transformer, an I/V conversion module, a feeding unit, and a wireless device. The transmitting and receiving device is a wide dynamic stable feeding, and is composed of a feeding current collecting module and a feeder temperature collecting module. The wireless receiving and transmitting circuit of the acquisition system adopts ASK or FSK modulation mode, and has low error correction capability and weak anti-interference ability; the wide current constant voltage conversion circuit only ensures the conversion circuit when the transformer current fluctuates within the range of 6% to 100%. Constant voltage output.

Summary of the invention

The object of the present invention is to provide a remote monitoring and management system for a power device for directly monitoring the state information of the power high voltage device and quantitatively determining the state value of the relevant part. The wireless transmission of the system not only ensures the remote monitoring and management of the high-voltage equipment, but also enables the whole system to send and receive better error correction capability, stronger anti-interference ability and more reliable communication.

The technical solution of the present invention is: A remote monitoring and management system for electric equipment, which includes none The line collector and the data converter, wherein the wireless collector is composed of a current transformer, a wide current constant voltage conversion circuit, a current sampling loop, an AC A/D acquisition unit, an AVR main control unit, a temperature sensor, and a temperature measurement The circuit and the wireless transceiver circuit are composed, and the signals of the current transformer and the temperature sensor are respectively transmitted and received by the wide current and constant voltage conversion circuit, the current sampling circuit, the AC A/D acquisition unit, and the temperature measurement circuit after being processed by the AVR main control unit. The circuit sends out the data signal; the data converter is composed of a wireless transceiver circuit, a hard clock circuit, an AVR main control unit, an RS485 data communication interface and a regulated power supply, and the wireless transceiver circuit, the hard clock circuit, and the RS485 data communication interface respectively Connected to the AVR master unit.

The above-mentioned power equipment remote monitoring management system is further characterized in that the wireless transceiver circuit adopts a GFSK modulation mode; the wireless transceiver circuit comprises a wireless receiving circuit and a wireless transmitting circuit, and the circuit receiving and transmitting frequency is 433M, 868M or 915M; The wide current constant voltage conversion circuit can realize a constant voltage output when the transformer current fluctuates within a range of 2% to 100%; the current transformer is a current transformer using low voltage power.

The remote monitoring and management system for electric equipment of the invention realizes on-site, timely and quantitative monitoring of high-voltage equipment according to the principle of "virtual potential", thereby obviously improving the monitoring and management level, and can also be conveniently applied to remote control of electric high-voltage equipment. system. Compared with the prior art, the system has stronger wireless transceiver error correction capability, stronger anti-interference ability and more reliable communication. DRAWINGS

1 is a block diagram of a wireless collector circuit of a remote monitoring and management system for a power device of the present invention; FIG. 2 is a block diagram of a data converter circuit of a remote monitoring and management system for a power device of the present invention; FIG. 3 is a circuit diagram of a remote monitoring and management system for a power device according to the present invention; Figure.

detailed description

The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings:

A typical remote monitoring system consists of a wireless collector, a data converter, and a field service terminal. The wireless collector collects the current of the high-voltage device in real time. The data converter recalls the current collected by the wireless collector and transmits it to the field service terminal in a wired or wireless manner. The main function of the data converter is the relay transmission of data. A transparent channel is formed between the collector and the field service terminal, and the field service terminal quantizes, stores, and counts the data. According to the comparison work, the processed data and information are uploaded to the front-end machine, and the front-end machine is distributed to each client according to the information type, and each client performs list, display, and plot according to the specific requirements of the business department. Comprehensive processing such as printing, storage, and alarming.

Referring to FIG. 1 and FIG. 2, a remote monitoring and management system for a power device includes a wireless collector and a data converter. The wireless collector is a current transformer, a wide current constant voltage conversion circuit, a current sampling circuit, and an AC. A/D acquisition unit, AVR main control unit, temperature sensor, temperature measurement circuit and wireless transceiver circuit. The signals obtained by the current transformer and the temperature sampling loop are respectively passed through wide current and constant voltage conversion circuit, current sampling circuit and AC A/D. After the acquisition unit and the temperature measurement circuit are processed by the AVR main control unit, the data signal is sent by the wireless transceiver circuit; the data converter is composed of a wireless transceiver circuit, a hard clock circuit, an AVR main control unit, an RS485 data communication interface, and The power supply consists of a regulated power supply, and the wireless transceiver circuit, hard clock circuit, and RS485 data communication interface are respectively connected to the AVR main control unit.

Wireless collector, as shown in Figure 1 - The current transformer uses a standard low-voltage power current transformer, the secondary side output is 500mA, the accuracy is 0.5 level 10VA, because the secondary side of the current transformer is sealed in the wireless collector All data is wirelessly transmitted, and the wireless collector floats, so the insulation protection design saves a lot of cost and is easy to operate; Wide current and constant voltage conversion: Current transformer wide current output, converted to constant by AC/DC rectification and voltage regulation The DC output of the voltage is applied to the principle of bootstrap stability when the current of the transformer is 2°/. When the fluctuation is within ~100%, the constant voltage output of the conversion circuit is sufficient to meet the actual needs; Current sampling circuit: A standard resistor is connected in series on the secondary main circuit of the current transformer for current sampling; AC A/D acquisition unit : The AC voltage sampling signal connected in series with the standard resistance of the secondary main circuit is amplified by the microcontroller and directly collected by the microcontroller. The advantage of AC acquisition is high voltage acquisition accuracy, which can reach level 1 and low circuit power consumption; AVR main Control unit: Wide current and constant voltage conversion provide power for the main control unit. The AVR micro-chip microcomputer collects current and temperature signals in real time and calculates. When receiving the data converter copying command, the collected current and temperature values are sent to the data conversion. When measuring temperature, a temperature sensor is added to the node of the power line, for example, a platinum resistance; a temperature measuring circuit: converting a temperature value corresponding to the resistance value of the platinum resistance into a corresponding voltage value for collection by the main control circuit; the wireless transceiver circuit includes Wireless reception The road and wireless transmission circuit adopt GFSK modulation mode, the communication frequency is 433M, 868M or 915M, the transmission power consumption is 0.05W, and the communication distance is not less than 10 meters.

The data converter, as shown in Figure 2:

Wireless receiving and transmitting circuit: Same as transceiver circuit in wireless collector; Hard clock circuit: Provide real-time clock for current and temperature wireless collector; AVR main control unit: controlled by upper computer, when the upper computer is sent through RS485 data communication interface When reading the wireless collector data command, the current and temperature data collected by the AVR main control unit are reported to the host computer. During normal operation, the above data is collected periodically (the timing interval can be set). The host computer communication complies with DL/T645. RS485 data communication interface: Data interface for communication with the host computer, remote communication by the host computer; Regulated power supply: AC AC power supply, DC voltage regulation for the above unit circuit 3 is the remote monitoring and management system for the power equipment of the present invention Circuit schematic.

Although the present invention has been disclosed in the above preferred embodiments, they are not intended to limit the invention, and it is obvious to those skilled in the art that various changes or modifications can be made without departing from the spirit and scope of the invention. The scope of the invention should be determined by the scope of the claims of the present application.

Claims

Rights request

1. A remote monitoring and management system for a power device, comprising a wireless collector and a data converter, wherein the wireless collector is a current transformer, a wide current constant voltage conversion circuit, a current sampling loop, an AC A/ D acquisition unit, AVR main control unit, temperature sensor, temperature measurement circuit and wireless transceiver circuit, the current transformer and temperature sensor signals are respectively through wide current and constant voltage conversion circuit, current sampling circuit, AC A/D acquisition unit, measurement After the temperature circuit is processed by the AVR main control unit, the data signal is sent by the wireless transceiver circuit; the data converter is composed of a wireless transceiver circuit, a hard clock circuit, an AVR main control unit, an RS485 data communication interface, and a regulated power supply. The wireless transceiver circuit, the hard clock circuit, and the RS485 data communication interface are respectively connected to the AVR main control unit.

2. The power device remote monitoring management system according to claim 1, wherein the wireless transceiver circuit adopts a GFSK modulation mode.

3. The power device remote monitoring management system according to claim 2, wherein the wireless transceiver circuit comprises a wireless receiving circuit and a wireless transmitting circuit, and the circuit transmitting and receiving frequency is 433M, 868M or 915M.

4. The remote monitoring and management system for a power device according to claim 1 or 2 or 3, wherein said wide current constant voltage conversion circuit is capable of constant fluctuation within a range of 2% to 100% of the rated current of the transformer. Pressure output.

5. The remote monitoring and management system for a power plant according to claim 4, wherein the current transformer is a current transformer for low voltage power.

6. A remote monitoring and management system for a power plant according to claim 1 or 2 or 3, wherein said current transformer is a current transformer for low voltage power.