CN109932552A - Transmission line of electricity magnetic storm induced current acquisition method and device based on Big Dipper short message - Google Patents
Transmission line of electricity magnetic storm induced current acquisition method and device based on Big Dipper short message Download PDFInfo
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- CN109932552A CN109932552A CN201910139608.5A CN201910139608A CN109932552A CN 109932552 A CN109932552 A CN 109932552A CN 201910139608 A CN201910139608 A CN 201910139608A CN 109932552 A CN109932552 A CN 109932552A
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Abstract
The invention discloses a kind of transmission line of electricity magnetic storm induced current acquisition method and device based on Big Dipper short message, the transmission line of electricity geomagnetic storm induced current acquisition method is the following steps are included: step 1: a magnetic induction intensity sensor being installed on to the magnetic field for acquiring electric current on transformer A phase outlet structure and generating, another magnetic induction intensity sensor is installed on the interference magnetic field acquired in environment near substation；Step 2: the magnetic field data of acquisition being sent into preprocessing module, is judged in transmission line of electricity with the presence or absence of geomagnetic storm induced current；Geomagnetic storm induced current then sends host computer by Big Dipper short message communication module for magnetic field data if it exists, otherwise empties scratchpad area (SPA) data；Step 3: host computer handles data to obtain geomagnetic storm induced current numerical value after receiving magnetic field data.
Description
Technical field
The present invention relates to natural disaster in electric power system event monitoring technical fields, more particularly to based on Big Dipper short message
Transmission line of electricity magnetic storm induced current acquisition method and device.
Background technique
Solar activity causes the variation in earth magnetic field to be known as geomagnetic storm.The geomagnetic storm induced electricity that geomagnetic storm causes in power grid
Stream can threaten to the safe and stable operation of power grid.With the construction of China's high voltage, large capacity, remote conveying power grid, more
Carry out more high voltage long-distance transmission systems all by the faradic influence of geomagnetic storm.In order to monitoring record geomagnetic storm
Induced current data need to be added geomagnetic storm induced current monitoring device in the line.
Although existing geomagnetic storm induced current on-Line Monitor Device, these devices are typically mounted in transformer both at home and abroad
Property point on, the disadvantage is that the raising of short trouble neutral point voltage, which once occurs, in transformer can damage the lower acquisition of resistance to voltage levels and sense
Device.In addition, current device is by common 2G/3G/4G wireless network transmissions data, this radio transmitting device is by public
With mobile communication base station, the transmission of data will all be impacted when plant failure occurs in base station or movable signal is poor,
The reliability of data transmission is relatively low compared with satellite transmits data.
Hall current sensor is all mounted on transformer by current geomagnetic storm induced current on-Line Monitor Device both domestic and external
On neutral point, 2G/3G/4G wireless network transmissions data is utilized.Once system jam transformer central point voltage increases meeting
Damage acquisition equipment, furthermore will affect the transmission of data when base station maintenance or weak movable signal.
Therefore, it is desirable to have a kind of transmission line of electricity magnetic storm induced current acquisition method and device to solve to install in the prior art
In equipment on transformer neutral point earthing bar vulnerable to destroy the problem of.
Summary of the invention
The invention discloses a kind of transmission line of electricity magnetic storm induced current acquisition method based on Big Dipper short message communication, it is described
Transmission line of electricity magnetic storm induced current acquisition method the following steps are included:
Step 1: a magnetic induction intensity sensor is installed on to the magnetic for acquiring electric current on transformer A phase outlet structure and generating
, another magnetic induction intensity sensor is installed on the interference magnetic field acquired in environment near substation；
Step 2: the magnetic field data of acquisition being sent into preprocessing module, is judged in transmission line of electricity with the presence or absence of geomagnetic storm sense
Answer electric current；Geomagnetic storm induced current then sends host computer by Big Dipper short message communication module for magnetic field data if it exists, no
Then scratchpad area (SPA) data are emptied；
Step 3: host computer handles data to obtain geomagnetic storm induced current numerical value after receiving magnetic field data.
Preferably, step 3 host computer carries out the Big Dipper short message that the Big Dipper short message communication module is sent
Processing, the group packet for realizing multiple Big Dipper short message packets according to Big Dipper short message number and correctly parsing, obtain geomagnetic storm sense
The magnetic induction intensity data for answering electric current to generate, and the magnetic induction that your law generates geomagnetic storm induced current is cut down according to Biot-sand
Intensity data takes the aerial magnetic permeability μ of exposure0=4 π × 10-7, the magnetic field strength X-axis component around A phase transmission line of electricity isThe magnetic field strength X-axis component of transformer outlet structure ambient enviroment isTransmission line of electricity spacing is L, and sensor is located at defeated
Right above electric line at H, then for three phase line, the geomagnetic storm circulated in three phase line is calculated using superposition theorem
Induced current generates magnetic induction intensity in sensor position:
Further obtain geomagnetic storm induced current numerical value are as follows:
Preferably, the transmission line of electricity geomagnetic storm induced current acquisition device includes: that data collection terminal, Big Dipper short message connect
It receives module, host computer and power module, the data collection terminal and connects Big Dipper short message receiving module and host computer, power supply according to this
Module connects data collection terminal and provides regulated power for it.
Preferably, the data collection terminal includes: magnetic flux density measurement module, preprocessing module, Big Dipper short message hair
Module and transmission line of electricity are sent, the power module provides regulated power, magnetic induction by transmission line of electricity for the data collection terminal
Strength measurement module is connect by preprocessing module with Big Dipper short message sending module.
Preferably, the magnetic flux density measurement module is respectively arranged on transformer A phase outlet structure and substation is attached
Interference magnetic field in nearly acquisition environment.
The transmission line of electricity geomagnetic storm induced current acquisition method that the invention proposes a kind of based on Big Dipper short message communication and
Device, the beneficial effect comprise that
1. acquisition sensor is mounted on transformer outlet structure, is avoided when system jam and be mounted on transformation
The measuring device of device neutral point is destroyed because neutral point voltage increases；
2. some remote districts are since wire communication line high construction cost, wireless public network signal are difficult to cover, information is adopted
Collection can not be transmitted by existing frequently-used 2G/3G/4G wireless network, therefore the present invention uses Big Dipper short message transmission device,
To expand use scope.The present invention is small by environmental constraints, and dipper system has the characteristics that " low in energy consumption, communication is fast ", can be well
Meet the requirement of transmission line of electricity geomagnetic storm induced current monitoring point real-time Data Transmission；
3. Big Dipper short message communication has both positioning function, short message includes location information, and the position of monitoring point can be determined with this
It sets.
Detailed description of the invention
Fig. 1 is mounted to the magnetic induction intensity sensor schematic on transformer A phase transmission line of electricity framework.
Fig. 2 is data collection terminal data acquisition and procession flow chart.
Fig. 3 is that host computer receives transmission line of electricity magnetic field when further calibrated after magnetic field strength date to data and calculates structure and shows
It is intended to.
Fig. 4 is the transmission line of electricity geomagnetic storm induced current acquisition device the present invention is based on Big Dipper short message communication.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label indicate same or similar element or element with the same or similar functions.Described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to use
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
There are saturation problems for transmission line of electricity voltage class height and electromagnetic sensor, accurately extract from transmission line of electricity tested
Signal is the key that guarantee measurement result accuracy.To the geomagnetic storm induced current of acquisition transmission line of electricity, since current Hall passes
The limitation of sensor dielectric level, the acquisition method for directlying adopt Hall sensor can not be achieved, therefore for transmission line of electricity
Geomagnetic storm sensor current signal acquisition, the present embodiment use magnetic induction intensity sensor measurement stationary magnetic field, then via data at
Reason obtains the indirect measurement method of geomagnetic storm induced current size.
The present embodiment use non-contact indirect measure, do not use on the market already existing Hall current sensor adopt
Collect transformer neutral point electric current but uses magnetic induction intensity sensor.
As shown in Figure 1, a magnetic induction intensity sensor is installed on transformer A phase transmission line of electricity framework.Monitoring dress
It sets after powering on, data acquisition process main program log-on data acquisition as shown in Figure 2 and process flow, acquisition A phase current generate
Magnetic induction intensity data, another magnetic induction intensity sensor acquire the stray magnetic field in environment and are used for data calibration.
It is " collimation stream " according to geomagnetic storm induced current, this feature of stationary magnetic field will be generated, preprocessing module is to magnetic
The data of induction sensor transmissions are analyzed and determined that stationary magnetic field then first passes through if it exists filters in preprocessing module MCU
Wave-path sequence filters out the alternating magnetic field that alternating current generates, then is sent to remote data processing center via Beidou communication module.
Based on the automatic transmission of Big Dipper short message communication protocol realization Beidou integral type acquisition terminal information, due to one
The limited length that short message can transmit, thus for certain longer information, it needs to compress it, unpack, number, point biography
It is defeated to arrive data center.
Host computer is solved according to the group packet of the multiple Big Dipper short message packets of number realization with correct after receiving Big Dipper short message
Analysis obtains the magnetic induction intensity data of geomagnetic storm induced current generation, geomagnetic storm induced current size is obtained after being further processed.
The specific process is as follows: the magnetic field around A phase transmission line of electricity is three power transmission line institutes since transmission line of electricity is there are three phase transmission line
The superposition in magnetic field is generated, host computer needs further to calibrate data after receiving magnetic field strength date, and transmission line of electricity magnetic field calculates
Structure chart is as shown in Figure 3.Cutting down your law according to Biot-sand can calculate, and take the aerial magnetic permeability μ of exposure0=4 π × 10-7, A
Magnetic field strength X-axis component around phase transmission line of electricity isThe magnetic field strength X-axis component of transformer outlet structure ambient enviroment
ForTransmission line of electricity spacing is L, and sensor is located at right above transmission line of electricity at H, then for three phase line, using superposition
Theorem can calculate the geomagnetic storm induced current to circulate in three phase line and generate magnetic induction intensity in sensor position:
Geomagnetic storm induced current size can be obtained by further calculating are as follows:
All acquisition equipments of the present invention include acquisition sensor, preprocessing module, Big Dipper short message communication sending module
It is all made of transmission line of electricity energy taking device and power supply is provided, avoid external power supply bring wiring inconvenience problem.Transmission line of electricity takes energy
Device can provide stable power supply output within the scope of conducting wire normal current, and realize self under short circuit and dash current
Protection realizes that prolonged low grade fever consumes stable operation.
As shown in figure 4, of the present invention be based on Big Dipper short message communication transmission line of electricity geomagnetic storm induced current measuring device,
Its hardware is by magnetic flux density measurement module, communication module, power module and upper structure at magnetic flux density measurement module peace
Loaded on transformer outlet structure, and it is connected with communication module.STC89C52 chip is chosen as MCU module.It chooses
For HMC5843 chip as magnetic flux density measurement module, the measurement range for surveying magnetic chip HMC5843 is -6~+6gauss, is differentiated
Rate is 120 μ gauss (1.2 × 10-8T), calculated by These parameters, as electric current i=3000A in route, do not cause HMC5843
Magnetic flux density measurement chip full scale, and can recognize the curent change of main transmission line 6mA or more.Select Big Dipper short message logical
Believe module as data transmitter-receiver set.Power module selects TLPS transmission line of electricity energy taking device.
Finally it is noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, the essence for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
Mind and range.
Claims (5)
1. a kind of transmission line of electricity magnetic storm induced current acquisition method based on Big Dipper short message, which is characterized in that the power transmission line
Road magnetic storm induced current acquisition method the following steps are included:
Step 1: a magnetic induction intensity sensor is installed on to the magnetic field for acquiring electric current on transformer A phase outlet structure and generating,
Another magnetic induction intensity sensor is installed on the interference magnetic field acquired in environment near substation；
Step 2: the magnetic field data of acquisition being sent into preprocessing module, is judged in transmission line of electricity with the presence or absence of geomagnetic storm induced electricity
Stream；Geomagnetic storm induced current then sends host computer by Big Dipper short message communication module for magnetic field data if it exists, otherwise will
Scratchpad area (SPA) data empty；
Step 3: host computer handles data to obtain geomagnetic storm induced current numerical value after receiving magnetic field data.
2. the transmission line of electricity magnetic storm induced current acquisition method according to claim 1 based on Big Dipper short message, feature
Be: the Big Dipper short message that step 3 host computer sends the Big Dipper short message communication module is handled, according to north
The group packet and correctly parsing that the short message number that struggles against realizes multiple Big Dipper short message packets, obtain the generation of geomagnetic storm induced current
Magnetic induction intensity data, and your law is cut down according to Biot-sand, the magnetic induction intensity data that geomagnetic storm induced current generates are taken cruelly
Reveal aerial magnetic permeability μ0=4 π × 10-7, the magnetic field strength X-axis component around A phase transmission line of electricity isTransformer goes out
The magnetic field strength X-axis component of line framework ambient enviroment isTransmission line of electricity spacing be L, sensor be located at transmission line of electricity just on
At square H, then for three phase line, the geomagnetic storm induced current to circulate in three phase line is calculated using superposition theorem and is existed
Sensor position generates magnetic induction intensity:
Further obtain geomagnetic storm induced current numerical value are as follows:
3. a kind of transmission line of electricity magnetic storm induced current acquisition device based on Big Dipper short message, it is characterised in that: the power transmission line
Road magnetic storm induced current acquisition device includes: data collection terminal, Big Dipper short message receiving module, host computer and power module, institute
It states data collection terminal and connects Big Dipper short message receiving module and host computer according to this, power module connection data collection terminal provides for it
Regulated power.
4. the transmission line of electricity magnetic storm induced current acquisition device according to claim 3 based on Big Dipper short message, feature
Be: the data collection terminal includes: magnetic flux density measurement module, preprocessing module, Big Dipper short message sending module and defeated
Electric line, the power module provide regulated power, magnetic flux density measurement mould by transmission line of electricity for the data collection terminal
Block is connect by preprocessing module with Big Dipper short message sending module.
5. the transmission line of electricity magnetic storm induced current acquisition device according to claim 4 based on Big Dipper short message, feature
Be: the magnetic flux density measurement module is respectively arranged on transformer A phase outlet structure and substation nearby acquires environment
In interference magnetic field.
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