WO2012083720A1

WO2012083720A1 - Real-time online monitoring devices for electromagnetic environment

Info

Publication number: WO2012083720A1
Application number: PCT/CN2011/079104
Authority: WO
Inventors: 黄学良; 谭林林; 钱朝阳; 张德进; 周赣; 柏杨; 陈楷; 王春宁
Original assignee: 江苏省电力公司; 东南大学; 江苏省电力公司南京供电公司
Priority date: 2010-12-22
Filing date: 2011-08-30
Publication date: 2012-06-28
Also published as: CN102109557A; CN102109557B

Abstract

Disclosed is a real-time online monitoring device for an electromagnetic environment, which comprises a main controller (5), an acquisition unit (1) for power frequency electromagnetic data, a time synchronization unit (2), a data processing unit (3) and a power system (4); the acquisition unit (1) for power frequency electromagnetic data comprises a high-accuracy power frequency electromagnetic sensor (101), a high-capacity battery (102), a power managing module (103) which comprises a DC/DC converter (103-1) and a unilateral diode (103-2), and at least two physical isolators (104); the physical isolators (104) are connected successively, with an input end thereof connected to the power system (4) and an output end connected to the positive pole of the unilateral diode (103-2). The negative pole of the unilateral diode (103-2) is connected to the DC/DC converter (103-1) and the high-capacity battery (102), and the output end of the DC/DC converter (103-1) is connected to a power input end of the high-accuracy power frequency electromagnetic sensor (101), which high-accuracy power frequency electromagnetic sensor (101) is also connected to the main controller (5) and the high-capacity battery (102). The device can achieve a long-period power supply and automatic charging for the high-accuracy power frequency electromagnetic sensor, and can effectively shield the effect on the measuring result of the switching-in of power lines.

Description

Instruction manual

Electromagnetic environment real-time online monitoring device

Technical field

The invention belongs to the field of power frequency electromagnetic field environment monitoring, and particularly relates to a device for collecting electromagnetic environment data around a power transmission station project. Background technique

In recent years, the electromagnetic interference and electromagnetic environment of power systems have received increasing attention. The ecological effects of power frequency electromagnetic fields have always been the focus of attention. The public's misunderstanding of electromagnetic pollution has caused unnecessary psychological panic, which has a strong opposition to the construction of the transmission station around it, which has caused great resistance to the construction of the transmission station facilities. Events occur frequently. The unnecessary direct consequence of this phenomenon is that the power grid construction lags behind the demand for electricity, and there is a “bottleneck” in power supply, which not only affects the development of society and economy, but also affects the normal use of electricity by the masses. In order to guide the masses to understand the transmission station facilities more intuitively and correctly, reduce the public's psychological panic, and smoothly promote the construction of various transmission stations, it is extremely important to publicize the electromagnetic data around the transmission station project in real time.

The power frequency electromagnetic environment parameters mainly include power frequency electromagnetic field strength and power frequency magnetic induction intensity. At present, the commonly used method is to measure the power frequency electromagnetic field strength and the magnetic induction intensity by using a hand-held measuring instrument. This method can quickly and easily measure the electromagnetic environment of the measured point. However, such special instruments are expensive, and some of the measured parameters are generally used for environmental monitoring and power sector analysis and research.

The existing instruments do not have the power frequency electromagnetic environment monitoring function for the public to the public of the power station facilities. In the existing technology, the external power supply interference shielding and field measurement are realized by the built-in battery in the measuring sensor. . After the staff completes certain measurement tasks, the sensor or the host needs to be connected to the power source for charging, and in general, only a single amount of measurement can be made on the power frequency electromagnetic field strength or the magnetic induction intensity. To achieve simultaneous measurement of two variables, manual operation is required, which is troublesome.

In the existing technology, the sensor automatic power supply technology is a technical problem to be solved in real time for real-time monitoring of the power frequency electromagnetic environment. The existing sensors mostly use the built-in battery as the power source, and the charging can generally achieve uninterrupted work for about 8-10 hours. If the cable is used for automatic charging, the charging cable is connected. When the sensor is not working, the induction error is large, and the maximum is up to several hundred times. In the case where the field value is small, the phenomenon that the error is introduced to cover the field value may occur. Therefore, how to solve the problem of shielding the charging power line after charging is completed is also a technical problem to be solved by the all-weather real-time online monitoring system. At the same time, as a real-time online monitoring system, it is necessary to have an accurate time system and automatic control capability to realize automatic work under unattended for a long time.

Based on the foregoing ideas, the inventors have developed the device provided by the present invention in response to the special requirements of the field all-weather real-time monitoring device. Summary of the invention

The technical problem to be solved by the present invention is to provide a real-time online monitoring device for an electromagnetic environment, which can realize long-term power supply and automatic charging of a high-precision power frequency electromagnetic sensor and can effectively shield against defects and deficiencies in the foregoing background art. The influence of the access of the power line on the measurement results, the automatic switching measurement of the power frequency electromagnetic field strength and the power frequency magnetic induction intensity, the uploading of data, and the local display.

The present invention solves the above technical problems, and the technical solution adopted is:

A real-time online monitoring device for electromagnetic environment, comprising a main controller, a power frequency electromagnetic data acquisition unit, a time synchronization unit, a data processing unit and a power supply system;

The power frequency electromagnetic data acquisition unit comprises a high precision power frequency electromagnetic sensor, a large capacity battery, a power management module and at least two physical isolators, the power management module comprising a DC/DC converter and a unidirectional diode; at least two physical isolations The devices are connected in turn, the input end is connected to the power supply system, the output end is connected to the positive pole of the unidirectional diode, and the negative pole of the unidirectional diode is connected to the input end of the DC/DC converter and the large-capacity battery, and the output end of the DC/DC converter is connected. High-precision power frequency electromagnetic sensor power input terminal, high-precision power frequency electromagnetic sensor is also connected to the main controller and large-capacity battery, and the measured electromagnetic field strength, magnetic induction intensity and remaining power are sent to the main controller under the control of the main controller. ;

The time synchronization unit is connected to the main controller to send time data to the main controller;

The data processing unit is connected to the main controller and stores data received by the main controller.

The physical isolator includes a normally open relay and a three-terminal regulator, wherein the input end of the three-terminal regulator is connected to the normally open contact input end of the normally open relay, and is commonly connected to the output end of the power system, and three The output end of the terminal regulator is connected to the electromagnetic coil of the normally open relay, and the normally open contact output end of the normally open relay is connected to the positive pole of the unidirectional diode in the power management module.

The power supply system includes a micro time switch and a charging device connected in sequence, wherein the micro time switch communicates with the main controller and is turned off under the control of the main controller; and the output connector of the charging device The input of the isolator.

The time synchronization unit described above includes a GPS timing module that can receive time information via GPS.

The above data processing unit is further connected to the display unit to display measurement data under the control of the main controller. After adopting the above scheme, the present invention has the following improvements:

(1) Automatically charge the large-capacity battery through the main controller, which solves the problem of power supply during all-weather operation. At the same time, when the battery is not charged, the external lead-in cable is automatically divided into several small segments to reduce the introduction error and solve the introduction cable. The problem of large interference error;

(2) The coordination of each system is realized by the main controller, and the communication between the main controller and each unit part adopts digital communication, which increases the reliability of the system;

(3) Multi-point monitoring can be realized by adding a power frequency electromagnetic data acquisition unit. DRAWINGS

Figure 1 is an overall architectural view of the present invention;

2 is a structural diagram of a power frequency electromagnetic data acquisition unit in the present invention;

Figure 3 is a block diagram of the system of the present invention. Detailed ways

The above described objects, features and advantages of the present invention will become more apparent from the Detailed Description.

1 is a schematic diagram of a main structure of a real-time online monitoring device for an electromagnetic environment according to the present invention, including a power frequency electromagnetic data acquisition unit 1, a time synchronization unit 2, a data processing unit 3, a power supply system 4, a main controller 5, and a display. Unit 6.

As shown in FIG. 2, the power frequency electromagnetic data acquisition unit 1 includes a high-precision power frequency electromagnetic sensor 101, a large-capacity battery 102, a power management module 103, and at least two physical isolators 104, wherein the power management module 103 includes The DC/DC converter 103-1 and the unidirectional diode 103-2; at least two physical isolators 104 are connected in series, the input end of which is connected to the output end of the power supply system 4, and the output end is connected to the positive pole of the unidirectional diode 103-2. By means of the setting of the physical isolator 104, the cable is divided into several small segments, thereby reducing the introduction error and solving the problem of large interference error of the incoming cable; the negative pole of the unidirectional diode 103-2 is connected to the DC/DC converter 103-1. The input terminal and the large-capacity battery 102 ensure the unidirectional flow of current to the subsequent stage; and the output of the DC/DC converter 103-1 is connected to the power supply of the high-precision power frequency electromagnetic sensor 101. Into the end.

In this embodiment, the physical isolator 104 includes a normally open relay 104-1 and a three-terminal regulator 104-2; wherein the input of the three-terminal regulator 104-2 and the normally open relay 104-1 The normally open contact input terminal is connected and connected to the output end of the power supply system 4, and the output end of the three-terminal regulator 103-4 is connected to the electromagnetic coil of the normally open relay 103-3, and the normally open relay 103-3 The normally open contact output is connected to the positive terminal of the unidirectional diode 103-2.

The time synchronization unit 2 is connected to the main controller 5, and includes a GPS timing module, which can receive time information through the GPS satellite and transmit it to the main controller 5 to complete the correction of the system time.

The main controller 5 is also connected to the display unit 6 via the data processing unit 3, and the data processing unit 3 can store the data received by the main controller 5 and feed the data to the display unit 6 for display.

In addition, as shown in FIG. 3, the power system 4 includes a micro time switch 403 and a charging device 402 connected in sequence, wherein the micro time switch 403 is a time switch of a normally open contact, and can communicate with the main controller 5. The shutdown is performed under the control of the main controller 5; the other end of the micro-time switch 403 is connected to the charging device 402, and the output of the charging device 402 is connected to the input of the physical isolator 104 to provide power.

2 and FIG. 3, in the operation of the present invention, when the large-capacity battery 102 is fully charged, its output is converted by the over DC/DC converter 103-1, and the power supply is supplied to the high-precision power frequency electromagnetic sensor 101. The high-precision power frequency electromagnetic sensor 101 is a smart sensor, and the measured power frequency electromagnetic data is transmitted to the main controller 5 via the optical fiber 700. The transmission using the optical fiber 700 can effectively reduce interference, and the micro time switch 403 is The disconnected state, the charging device 402 connected thereto, and the physical isolator 104 are all in the disconnected state, and the power line is divided into several segments, which effectively reduces the interference of the cable introduction to the measuring unit, and the main controller 5 collects the respective units. The returned data is processed and sent to the display unit 6 for display.

In addition, the high-precision power frequency electromagnetic sensor 101 is also connected to the large-capacity battery 102, and the remaining power of the large-capacity battery 102 can be measured according to the instruction of the main controller 5, and the measurement result is returned to the main controller 5 in real time; when the main controller 5 judges When the power of the large-capacity battery 102 is insufficient, the micro-time switch 403 is controlled to be turned off. At this time, the current is converted by the charging device 402 and enters the input end of the physical isolator 104, and the three-terminal regulator 103 in the physical isolator 104. The -4 operation causes the normally open relay 103-3 to be closed, and the current flows through the output of the physical isolator 104 to the input of the next physical isolator 104. The final charging current is mostly charged for the large capacity battery 102, and a small portion is supplied to the high. The power frequency electromagnetic sensor 101 is used for power supply; when the main controller 5 determines that the large-capacity battery 102 is fully charged, the signal is sent to turn off the micro-control switch 403, and then the charging device 402 and the physical isolator 104 are disconnected, and the charging cable is divided into several segments. . To prevent large capacity electricity The current backflow of the pool 102 causes the normally-on relay 103-3 to be effectively disconnected, thereby affecting the effective disconnection of the physical isolator 104. In this embodiment, the unidirectional diode 103-2 is introduced to ensure that the current of the large-capacity battery 102 is not Reflux, to achieve effective cutting.

The electromagnetic environment real-time online monitoring device according to the present invention adds the control of the power system 4 and the main controller 5 on the basis of the traditional measuring and monitoring instrument, and introduces the GPS time to real-time publicize the monitoring data. When the system is working, the main controller 5 sends relevant instructions to the power frequency electromagnetic data collecting unit 1, and the power frequency electromagnetic data collecting unit 1 transmits the measured power frequency electromagnetic field strength or magnetic induction intensity to the main controller 5, and the main controller 5 The time signal in the time synchronization unit 2 is read out in the same manner and processed. The data processing unit 3 continuously monitors the state of charge of the large-capacity battery 102 and simultaneously sends the power state to the main controller 5 for backup. After the power of the large-capacity battery 102 is lower than a certain value, the main controller 5 passes the micro-time control switch. The 403 controls its power-on system 4 to automatically charge the large-capacity battery 102. After the battery is fully charged, disconnect it.

The present invention provides a detailed description of the electromagnetic environment real-time online monitoring device provided by the present invention. The principles and embodiments of the present invention are described herein using specific embodiments. The above description is applicable to the method for understanding the present invention and The present invention is not limited by the scope of the present invention, and the description of the present invention should not be construed as limiting the scope of the present invention.

Claims

Claim

1. A real-time online monitoring device for an electromagnetic environment, comprising: a main controller, a power frequency electromagnetic data acquisition unit, a time synchronization unit, a data processing unit and a power supply system;

The power frequency electromagnetic data acquisition unit comprises a high precision power frequency electromagnetic sensor, a large capacity battery, a power management module and at least two physical isolators, the power management module comprising a DC/DC converter and a unidirectional diode; at least two physical isolations The devices are connected in turn, the input end is connected to the power supply system, the output end is connected to the positive pole of the unidirectional diode, and the negative pole of the unidirectional diode is connected to the input end of the DC/DC converter and the large-capacity battery, and the output end of the DC/DC converter is connected. High-precision power frequency electromagnetic sensor power input terminal; High-precision power frequency electromagnetic sensor is also connected to the main controller and large-capacity battery, and the measured electromagnetic field strength, magnetic induction intensity and remaining power are sent to the main controller under the control of the main controller. ;

2. The electromagnetic environment real-time online monitoring device according to claim 1, wherein: the physical isolator comprises a normally open relay and a three-terminal regulator, wherein the input end of the three-terminal regulator and the normally open relay The normally open contact input terminal is connected and connected to the output end of the power system, and the output end of the three-terminal regulator is connected to the electromagnetic coil of the normally open relay, and the normally open contact output end of the normally open relay is connected to the power management module. The anode of the unidirectional diode.

3. The electromagnetic environment real-time online monitoring device according to claim 1, wherein: the power supply system comprises a micro time switch and a charging device connected in sequence, wherein the micro time switch communicates with the main controller, The main controller is turned off under control; and the output of the charging device is connected to the input of the physical isolator.

4. The electromagnetic environment real-time online monitoring device according to claim 1, wherein: the time synchronization unit comprises a GPS timing module that can receive time information via GPS.

5. The electromagnetic environment data real-time online monitoring device according to claim 1, wherein: the data processing unit is further connected to the display unit, and the measurement data is displayed under the control of the main controller.