CN107607805A - A kind of distribution overhead line synchronous phasor measurement and operational monitoring terminal and method - Google Patents
A kind of distribution overhead line synchronous phasor measurement and operational monitoring terminal and method Download PDFInfo
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- CN107607805A CN107607805A CN201710638921.4A CN201710638921A CN107607805A CN 107607805 A CN107607805 A CN 107607805A CN 201710638921 A CN201710638921 A CN 201710638921A CN 107607805 A CN107607805 A CN 107607805A
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Abstract
The invention discloses a kind of distribution overhead line synchronous phasor measurement and operational monitoring terminal and method, including monitoring modular, recording module and power module；Recording module includes recording processor, analog signal collector, sampling current transformer and electric field strength transducer[sensor, and recording processor receives the recorder data of analog signal collector collection, and calculates synchronized phasor and the quality of power supply using recorder data；Monitoring modular obtains line current signal, electric field intensity signal, synchronized phasor and the quality of power supply from recording module, and passes through network cable transmission to main website server；Power module is used to provide suitable power supply to recording module and monitoring modular.The present invention can record power distribution network operation exception and transient-wave during failure, and can monitors power distribution network power system mesomeric state operation action in real time, and the power quality problems such as harmonic pollution can also be analyzed, provide temporary stable state behavior monitoring more fully, careful for distribution network operation.
Description
Technical field
The present invention relates to power system automatic field, and in particular to a kind of distribution overhead line synchronous phasor measurement and fortune
Row monitoring terminal and method.
Background technology
Power distribution network is the low voltage electric network that user is directly connected in power system, is the key for ensureing user security reliable power supply
Link.With the development of China's economic technology, modern industry automatization level is greatly improved, and people are for distribution network operation
Horizontal requirement more and more higher, and China's power distribution network has that area coverage is wide, complicated, accumulation distance is long, running environment is disliked
Of inferior quality feature, power distribution network is caused to turn into accident rate highest link in power system.In recent years, power distribution network scale constantly expands,
On the one hand, wind-force, photovoltaic distributed regenerative resource quickly increase so that power distribution network becomes active by traditional passive network
Network, system dynamic behaviour and power quality problem more sophisticated；On the other hand, the great Rong such as supercomputer, large data center
The amount intensively nonlinear loads such as wavy load and electric automobile, energy storage device start pressure or low-voltage network in a large amount of accesses, change
Part throttle characteristics traditional in power distribution network is become, has caused power quality problem to protrude, the safe and stable operation of distribution network systems has been produced
Strong influence.
Electrical power distribution automatization system is the most direct effective means for improving power distribution network operation level, and it both can be by monitoring eventually
End realizes that distribution network electric quantity information is considerable, can realize the optimization fortune of power distribution network based on power distribution automation primary equipment again
OK.Line-failure indicator is exactly one kind of power distribution automation monitoring terminal, is installed on distribution line, monitors line electricity in real time
The electric quantity informations such as stream, electric field strength, identify that line short and earth fault, operation maintenance personnel can be by the alarms of fault detector
It has been shown that, the rapid localization of faults, sound assurance is provided for the positioning of distribution fast failure, troubleshooting.But existing failure refers to
Show that device has some following deficiency：(1) do not possess synchronized phasor measurement capability, lack power distribution network is carried out presence assessment,
The data record of stability forecast；(2) do not possess electric energy quality monitoring ability, can not recognize power distribution network appearance harmonic wave, three-phase not
The power quality problems such as balance；(3) only consider the monitoring to electric quantity information, ignore to line environment information (line temperature, ring
Border air humidity, line vias situation etc.) collection and monitoring.Therefore, current failure indicator is not met by real to circuit
The requirement of existing panorama monitoring.
Synchronized phasor measuring equipment (PMU) and equipment for monitoring power quality are exclusively used in wide area synchronous phasor measurement and electric energy matter
The monitoring of amount, complete monitoring system include the supporting soft hardware equipment such as main station system, database, the network equipment, investment operation into
This is big, therefore is usually mounted to power regulation station and the power station of voltage levels, the less power distribution network applied to mesolow grade
Network.
With the continuous increase of power distribution network scale, the continuous complication of distribution connected mode, load element, power distribution network is transported
The requirement more and more higher of row monitoring, scene is there is an urgent need to a kind of perfect in shape and function, construction is reliable, install convenient new monitoring is whole
End, synchronized phasor is measured and electric energy quality monitoring is integrated into fault detector, and the monitoring of newly-increased line channel state
Function, realize the comprehensive monitoring to distribution Running State.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the invention provides a kind of distribution overhead line synchronous phasor measurement and
Operational monitoring terminal and method, the monitoring terminal is in addition to the monitoring and recording processing function that possess ordinary failures indicator, simultaneously
Synchronized phasor measuring function and electric energy quality monitoring function are integrated with, power distribution network operation exception and transient state during failure can be recorded
Waveform, and can monitor power distribution network power system mesomeric state operation action in real time, and can also analyze the qualities of power supply such as harmonic pollution and ask
Topic, temporary stable state behavior monitoring more fully, careful is provided for distribution network operation.
The technical solution adopted in the present invention is：
A kind of distribution overhead line synchronous phasor measurement and operational monitoring terminal, including closed shell, in the housing
Provided with monitoring modular, recording module and power module；
The recording module includes recording processor, analog signal collector, sampling current transformer and electric-field intensity and passed
Sensor, the sample rate current sensor are used for measurement circuitry electric current, and the electric field strength transducer[sensor is used for measurement circuitry electric-field strength
Degree, the analog signal collector are used to gather line current signal and the electric-field intensity from the sample rate current sensor
Electric field intensity signal is gathered in sensor, and signal will be collected and be converted into data signal, the recording processor receives simulation
Line current signal and electric field intensity signal after signal picker conversion, and utilize the line current signal and electric-field intensity
Signal of change synchronized phasor and the quality of power supply；
The monitoring modular, for obtaining the line current signal, electric field intensity signal, synchronized phasor from recording module
And the quality of power supply, and pass through network cable transmission to main website server；
The power module, for providing suitable power supply to recording module and monitoring modular.
Further, the recording module also includes alignment system, and the recording processor is obtained in real time by alignment system
Synchronizing clock signals are taken, and the recorder data of analog signal collector, the alignment system bag are read according to synchronizing clock signals
Include GPS system or triones navigation system.
Further, the monitoring modular include master controller, Temperature Humidity Sensor, microcam, communication module and
Memory, the Temperature Humidity Sensor are used for measurement circuitry skin temperature and circuit ambient air humidity, the microcam
For line channel ambient image information around camera terminal, the master controller is used to gather humiture in Temperature Humidity Sensor
The data-signal of environment picture signal and recording module transfer in signal, microcam, and store in memory, main control
Device is by communication module by the data signal transmission of collection to main website server.
Further, the communication module includes ethernet communication device and GPRS communicators, the master controller by with
Too Network Communication device and GPRS communicators carries out data transmission with main website server.
Further, the communication module also includes infrared communication device, and the master controller passes through infrared communication device and people
Work handheld terminal is communicated,.
Further, the quantity of the microcam is 3, is separately positioned on the both sides and bottom of housing.
Further, the power module includes power supervisor, power taking current transformer, super capacitor and lithium battery,
The power supervisor by power taking current transformer from circuit power taking, it is described and by power storage into the super capacitor
Lithium battery is used to be used as back-up source.
Further, the bottom of the housing is additionally provided with warning light, when there is out-of-limit generation, passes through main controller controls
Warning light automatic alarm.
Further, the housing is made up of upper shell and lower house two parts, and the upper shell and lower house pass through spiral shell
Bolt is fixedly connected, and realizes the installation and fixation of monitoring terminal on the line.
Further, spring pressuring plate is provided with the lower house face relative with upper shell, for firmly clamping circuit,
Prevent terminal from position excursion occurs.
The method of work of a kind of distribution overhead line synchronous phasor measurement and operational monitoring terminal, comprises the following steps：
Step 1：Initialization apparatus, memory is arrived by primary processor periodically collection circuit environmental information data and storage
In, and by communication module by line environment uploading information data to main website server；
Step 2：Judge whether circuit meets recording entry condition, if being unsatisfactory for recording entry condition, into step:3,
If meet recording entry condition, into step 4；
Step 3：By analog signal collector periodically collection line current and electric-field intensity data and it is transferred to recording
Processor, recording processor calculate electric current and electric-field intensity virtual value according to the line current and electric-field intensity data that receive
And master controller is transferred to, after master controller stores the electric current of acquisition and electric-field intensity virtual value, by communication module by line
Road electric current and electric-field intensity virtual value are uploaded to main website server, return to step 2；
Step 4：Open alignment system to position in real time, analog signal collector produces A/D according to the sample frequency set
Conversion and control sequential, gathers line current and electric-field intensity data, and recording processor is according to the sample frequency of setting, from each week
Ripple selected part sampled point synchronizes phasor calculation, and remaining sampled point carries out quality of power supply calculating, and by line current, electric field
Intensity data and result of calculation are transmitted to master controller, and master controller is by the data Cun Chudao memories received；
Step 5：After recording terminates, master controller by line current, electric-field intensity data and calculates knot by communication module
Fruit is sent to main website server.
Further, in the step 1, the condition that recording starts includes：(1) A, B, C three-phase electric field strength Sudden Changing Rate are got over
Limit starts；(2) the out-of-limit startup of A, B, C three-phase current Sudden Changing Rate；(3) the out-of-limit startup of zero-sequence current Sudden Changing Rate；(4) harmonic wave is out-of-limit opens
It is dynamic；(5) remote control is called survey together and started.
Further, in the step 4, the synchronized phasor includes electric current phasor and frequency, and the quality of power supply includes
Frequency departure, harmonic wave and three-phase imbalance amount.
Further, in the step 4, the computational methods of the synchronized phasor are：
If line current signal is
Wherein, X (t) is the continued time domain signal of electric current；X is current effective value；ω is angular speed；For initial phase angle；
Represented with vector form
Wherein,For electric current phasor；For the fundamental phasors drawn by Fourier transformation；XRFor phasor real part, XIFor void
Portion；N is phasor sampled point (N=50, k=1,2 ... N), xkFor sampling point value；
Sampling frequency deviation is
Wherein, current respective value is used as using last phasor amplitude, phase angle.
Sample frequency is
f1=fN+Δf
fNFor system benchmark rated frequency.
Further, in the step 4, the computational methods of the quality of power supply are：
Frequency departure is：
Δ f=fT-50
Wherein, fTFor measurement frequency in time of measuring window, equal to the average value of frequency real time data in time T；
Nth harmonic electric current containing ratio HRInFor
Wherein, InFor n-th harmonic current effective value, I1For fundamental current virtual value；
Current total harmonic distortion rate THDIFor
Three-phase current unbalance degree is
Wherein, I1、I2The respectively positive-sequence component and negative sequence component of line current, according to three-phase fundamental current vector data,
Positive and negative, zero-sequence current component is calculated using symmetrical component method, brings above formula into and calculates three-phase current unbalance degree.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) using recording module electric field strength, the current information of measurement and periodic report infield circuit, and can in real time
The events such as automatic alarm prompting voltage jump, electric current be out-of-limit, realize all the period of time, round-the-clock power distribution network monitoring running state；
(2) the simultaneously harmonic wave of periodic report infield circuit, three-phase imbalance, frequency are measured in real time using recording processor
The quality of power supply information such as deviation, and the prompting capable of automatic alarm event such as the quality of power supply is out-of-limit, realize all the period of time, round-the-clock distribution
Network electric energy quality monitors；
(3) event of failure for carrying out high-precision, high sample frequency by analog information collector using recording processor is same
Recording is walked, realizes that short trouble and earth fault differentiate on the spot, coordinates achievable distribution network failure fast with power distribution automation main station
Fast route selection and precise positioning；
(4) realize that strange land clock is synchronous using the time service positioning of GPS system or triones navigation system；
(5) power taking current transformer is used, can be from wire load current sense suitable for the distribution line of free voltage grade
Power taking is answered, working power is provided for terminal；
(6) the real-time measurement circuitry conductor temperature information of Temperature Humidity Sensor, and cue circuit temperature capable of automatic alarm are used
Out-of-limit event, realize line temperature monitoring function；
(7) line channel image information time recording and can be reported by microcam, realizes that channel image monitors work(
Energy.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not form the improper restriction to the application.
Fig. 1 is the distribution overhead line synchronous phasor measurement of the embodiment of the present invention and the structured flowchart of operational monitoring terminal；
Fig. 2 a are the distribution overhead line synchronous phasor measurement of the embodiment of the present invention and the front view of operational monitoring terminal；
Fig. 2 b are the distribution overhead line synchronous phasor measurement of the embodiment of the present invention and the side view of operational monitoring terminal；
Fig. 2 c are the distribution overhead line synchronous phasor measurement of the embodiment of the present invention and the upward view of operational monitoring terminal；
Fig. 3 is the distribution overhead line synchronous phasor measurement of the embodiment of the present invention and the method for work of operational monitoring terminal
Flow chart；
Wherein, 1, monitoring modular, 2, recording module, 3, power module, 4, master controller, 5, Temperature Humidity Sensor, 6, micro-
Type video camera, 7, network communication device, 8, GPRS communicators, 9, infrared communication device, 10, high-speed internal memory, 11, recording processor, 12,
High speed analog signal collector, 13, GPS/ triones navigation systems, 14, measured current transformer, 15, field strength sensor, 16, electricity
Source manager, 17, power taking current transformer, 18, super capacitor, 19, lithium battery, 20, housing, 21, circuit, 22, warning lamp,
23rd, bolt, 24, spring pressuring plate.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As shown in figure 1, in order to meet the requirement to power distribution network operational monitoring, present embodiment discloses a kind of distribution overhead line
Road synchronous phasor measurement and operational monitoring terminal, including closed shell, the housing is interior to be provided with monitoring modular 1, recording module 2
With power module 3；Recording module 2 is used to gather line current, electric-field intensity and clock data, and according to line current, electric field
Intensity and clock data synchronize phasor and the quality of power supply calculates, and monitoring modular 2 is used to obtain the circuit from recording module
Current signal, electric field intensity signal, synchronized phasor and the quality of power supply, and pass through network cable transmission to main website server；Power module
3, for providing suitable power supply to recording module and monitoring modular.
The distribution overhead line synchronous phasor measurement and operational monitoring terminal that the present embodiment provides refer to except possessing ordinary failures
Show outside the monitoring and recording processing function of device, while be integrated with synchronized phasor measuring function and electric energy quality monitoring function, can
Power distribution network operation exception and transient-wave during failure are recorded, and can monitors power distribution network power system mesomeric state operation action in real time,
And the power quality problems such as harmonic pollution can also be analyzed, provide temporary stable state row more fully, careful for distribution network operation
For monitoring.
In order that above-described embodiment more optimizes, above-mentioned recording module 2 includes sampling current transformer 14 and electric-field intensity
Sensor 15, the sample rate current sensor 14 are used for measurement circuitry electric current, and the sampling current transformer is using measurement level 0.5
Level Open Type Electric Current Mutual Inductor, the iron core of the cylinder of current transformer are made up of two parts, are connected on overhead transmission line with shape
Into a complete magnetic circuit, CT no-load voltage ratios are 100:1, core material closes using initial permeability up to more than 100,000 perms
Gold, the input to weak signal have higher accuracy；The electric field strength transducer[sensor 15 can measure high-voltage power system
In transient electric field, the detection for electric-field intensity.
Above-mentioned recording module 2 also includes analog signal collector 12, and the analog signal collector 12 has 8 roads defeated
Enter, built-in filter circuit, a/d converter and programmable gate array, filter circuit, which is used to consider, removes higher hamonic wave signal in power network, high
The analog signals such as electric current, field strength are converted to data signal to precision by 16 bit A/D converters according to digital-to-analogue conversion control sequential at a high speed,
Programmable gate array is used to data signal being cached；Analog signal collector 12 is from the sample rate current sensor 14
Electric field intensity signal is gathered in middle collection line current signal and the electric field strength transducer[sensor 15, and uses high-precision high-speed 16
Digit weighted-voltage D/A converter will collect signal and be converted into data signal, and using programmable gate array as data buffer storage.
Above-mentioned recording module 2 also includes recording processor 11；The recording processor 11 is based on DSP platform, receives mould
Intend line current signal and electric field intensity signal after signal picker 12 converts, and utilize the line current signal and electric field
Strength signal calculates synchronized phasor and the quality of power supply.
In order to obtain clock information in real time, above-mentioned recording module 2 also includes alignment system 13, and recording processor 11 passes through
Alignment system 13 obtains synchronizing clock signals in real time, and the recording number of analog signal collector 12 is read according to synchronizing clock signals
According to the data of recorder data line current and electric-field intensity, the alignment system includes GPS system or triones navigation system.
In order that above-described embodiment more optimizes, monitoring modular 1 described above include master controller 4, Temperature Humidity Sensor 5,
Microcam 6, ethernet communication device 7, GPRS communicators 8 and infrared communication device 9, the Temperature Humidity Sensor 5 are used to measure
Circuit skin temperature and circuit ambient air humidity, the microcam 6 are used for line channel environment map around camera terminal
As information, the master controller 4 is used to gather temperature-humidity signal in Temperature Humidity Sensor 5, ambient image letter in microcam 6
Number and the recorder data that transmits of recording module 2, and sent by ethernet communication device 7 and GPRS communicators 8 to main website server,
The master controller 4 is communicated by infrared communication device 9 and man-hour manually hand-held terminal, can scene modification terminal configuration parameters or under
Data are carried, most suitable data transfer mode can be selected according to varying environment using the communication modes of multimode.Master controller 4 is also
Sample frequency can be set, recording processor 11 is automatically generated modulus and turn by initializing the running parameter of recording processor 11
The control sequential changed, reach the purpose to synchronized phasor and quality of power supply information high precision collecting.
In order to more make monitoring terminal more comprehensively monitor line channel situation, the quantity of the microcam 6 is 3, point
The both sides and bottom of monitoring terminal housing are not arranged on, for line channel ambient image information around camera terminal, are sent out in time
Now hinder the potential safety hazard of circuit operation.
In order that data high-speed stores, the monitoring modular 1 also includes memory 10, and master controller 4 is by the data of collection
Real time high-speed is stored in memory 10, avoids loss of data, is easy to subsequent query.
In order that above-described embodiment more optimizes, power module 3 described above includes power supervisor 16, power taking Current Mutual Inductance
Device 17, super capacitor 18 and lithium battery 19, as circuit normal power supply (5A-1000A), the power supervisor 16 passes through power taking
Current transformer 17 is from circuit power taking, as the power supply of other modules of terminal, and by power storage to the super capacitor
In 18；When distribution line load relatively low (≤5A) or power-off, power supply is provided for terminal by super capacitor 18 first, by lithium battery
19 are used as back-up source, ensure that fault recorder data is uploaded to main website by terminal, and after confirming that transmission terminates, terminal enters low-power consumption
Operational mode, normal operation of terminal is now ensured by lithium battery 19.
In the present embodiment, the super capacitor 18 uses 60F/2.7V, has high current fast charging and discharging feature, while
There is the storage characteristics of battery, the stable terminating circuit voltage when current anomaly fluctuates, provide standby electricity for terminal during line fault
Source, super capacitor 18 can should independently maintain when fully charged the work of device global function to be not less than 12h.The matched somebody with somebody voltage of lithium battery 19 is
DC24V, capacity are not less than 7Ah.
In order that above-described embodiment more optimizes, the housing of distribution overhead line synchronous phasor measurement and operational monitoring terminal is adopted
With nonmetallic materials, totally-enclosed design, there is the degree of protection not less than IP67, as shown in Fig. 2 a, Fig. 2 b and Fig. 2 c, described
Warning light 22 is provided with housing, when pressure mutation occurs, electric current is out-of-limit, the quality of power supply is out-of-limit or during line temperature out-of-limit event,
By main controller controls warning light automatic alarm, all the period of time, round-the-clock distribution Running State, distribution network electric energy quality are realized
Monitored with line temperature；The housing 20 is made up of upper shell and lower house two parts, is led between the upper shell and lower house
Cross bolt 23 to be fixedly connected, realize the installation and fixation of monitoring terminal on the line；The lower house face relative with upper shell
On be provided with spring pressuring plate 24, can firmly clamp circuit, prevent terminal occur position excursion.
The distribution overhead line synchronous phasor measurement and operational monitoring terminal that the present embodiment provides have two kinds of methods of operation,
Respectively：
Global function operational mode：Line current and the recording number of electric-field intensity are gathered by analog signal collector high-frequency
According to the synchronizing clock signals that recording processor gathers according to alignment system read the recording number that high speed analog signal collector gathers
According to and carrying out the supercomputing of synchronized phasor and the quality of power supply, stored recorder data and result of calculation to depositing by master controller
In reservoir, and corresponding communication mode is selected to upload data to the server of advocating war of power distribution automation main station by communication module.
When applied to wide area synchro measure, electric energy quality monitoring, short trouble recording, monitoring terminal is run in such a mode.
Low power operation pattern：Detected for Power System Steady-state amount, per some minutes, the periodic gathering line of recording processor
The Power System Steady-state amount such as road current signal, field intensity signal, master controller send the data to main website server by communication module；For
Power network transient detects, and when a failure occurs it, global function operational mode, note is carried out based on electric current, field strength mutation trigger sensor
After record one section of recorder data of transmission, sensor returns low power operation pattern.When applied to power distribution network operational monitoring, the present apparatus
Operation is in such a mode.
Distribution overhead line synchronous phasor measurement machine operational monitoring terminal can be directly mounted at distribution disclosed in the present embodiment
The optional position of the power distribution networks such as overhead transmission line, power distribution station and ring main unit, at the monitoring and recording for possessing ordinary failures indicator
Manage outside function, while be integrated with synchronized phasor measuring function and electric energy quality monitoring function, power distribution network operation exception can be recorded
With transient-wave during failure, and can monitors power distribution network power system mesomeric state operation action in real time, and can also analyze harmonic wave dirt
The power quality problems such as dye, temporary stable state behavior monitoring more fully, careful is provided for distribution network operation.
As shown in figure 3, present embodiment discloses a kind of distribution overhead line synchronous phasor measurement and operational monitoring terminal
Method of work, it is characterized in that, comprise the following steps：
Step 1：Initialization apparatus, monitoring terminal receives calls survey signal together to circuit humiture and channel image, passes through
Primary processor, which periodically gathers circuit environmental information data and stored, believes line environment into memory, and by communication module
Breath data are uploaded to main website server；
Step 2：Judge whether circuit meets recording entry condition, if being unsatisfactory for recording entry condition, into step:3,
If meet recording entry condition, into step 4；
Step 3：By analog signal collector periodically collection line current and electric-field intensity data and it is transferred to recording
Processor, recording processor calculate electric current and electric-field intensity virtual value according to the line current and electric-field intensity data that receive
And master controller is transferred to, after master controller stores the electric current of acquisition and electric-field intensity virtual value, by communication module by line
Road electric current and electric-field intensity virtual value are uploaded to main website server, return to step 2
Step 4：Open alignment system to position in real time, analog signal collector produces A/D according to the sample frequency set
Conversion and control sequential, gathers line current and electric-field intensity data, and recording processor is according to the sample frequency of setting, from each week
Ripple selected part sampled point synchronizes phasor calculation, and remaining sampled point carries out quality of power supply calculating, and by line current, electric field
Intensity data and result of calculation are transmitted to master controller, and master controller is by the data Cun Chudao memories received；
Step 5：After recording terminates, master controller by line current, electric-field intensity data and calculates knot by communication module
Fruit is sent to main website server.
In the step 1 of the present embodiment, the condition that recording starts includes：(1) A, B, C three-phase electric field strength Sudden Changing Rate are got over
Limit starts；(2) the out-of-limit startup of A, B, C three-phase current Sudden Changing Rate；(3) the out-of-limit startup of zero-sequence current Sudden Changing Rate；(4) harmonic wave is out-of-limit opens
It is dynamic；(5) remote control is called survey together and started.
In the step 3 of the present embodiment, the synchronized phasor includes electric current phasor and frequency, and the quality of power supply includes
Frequency departure, harmonic wave and three-phase imbalance amount.
In the present embodiment, synchronized phasor and power quality data computational methods in the step 4：
Sample frequency is set as 12.8Khz, each cycle samples 256 points, chooses wherein 50 points and carries out synchronized phasor
Calculate, calculating frequency setting is 10Hz, therefore synchronized phasor calculating needs 250 sampled points to participate in calculating.It is remaining 206 per cycle
Sampled point participates in the quality of power supply and calculated, and calculating frequency is 1Hz, therefore quality of power supply calculating needs 10300 sampled points.Synchronized phasor
Computational methods are as follows：
If line current signal is as follows
Wherein, X (t) is the continued time domain signal of electric current；X is current effective value；ω is angular speed；For initial phase angle.
Represented with vector form
Wherein,For electric current phasor；For the fundamental phasors drawn by Fourier transformation；XRFor phasor real part, XIFor void
Portion；N is phasor sampled point (N=50, k=1,2 ... N), xkFor sampling point value.
In sampling window moving process, often increase a point, just remove initial first point, then according to equation below
Recursive calculation obtains current phasor value, then second phasor value is calculated by a upper formula.
Wherein, XNTo increase point, X0For initial point.X′R、X′IFor phasor real part and imaginary part after newly-increased point.
Sampling frequency deviation is
Wherein, current respective value is used as using last phasor amplitude, phase angle.
Sample frequency is
f1=fN+Δf
fNFor system benchmark rated frequency (50Hz).
The quality of power supply is calculated as follows,
Frequency departure is：
Δ f=fT-50
Wherein, fT is measurement frequency in time of measuring window, equal to the average value of frequency real time data in time T.Here
Value 1 second.
The amplitude and phase value of each harmonic are calculated by Fourier transformation, so as to obtain each harmonic containing ratio and electric current
Percent harmonic distortion.
Nth harmonic electric current containing ratio HRInFor
I in formulanFor n-th harmonic current effective value, I1For fundamental current virtual value.
Current total harmonic distortion rate THDIFor
Three-phase current unbalance degree is
Wherein, I1、I2The respectively positive-sequence component and negative sequence component of line current, according to three-phase fundamental current vector data,
Positive and negative, zero-sequence current component is calculated using symmetrical component method, brings above formula into and calculates three-phase current unbalance degree.
In the monitoring method of distribution overhead line synchronous phasor measurement and operational monitoring terminal disclosed in the present embodiment, work as line
When road fault-free occurs and terminal is without survey triggering is called together, monitoring terminal enters under low power operation pattern to distribution Running State
Row monitoring, when line short fault or main website are called together when surveying signal triggering terminal, monitoring terminal is operated in global function operational mode, record
Ripple processor starts to carry out high frequency collection to line current and field strength data, and phasor and electricity are synchronized according to synchronizing clock signals
Energy quality high frequency calculates, and primary processor stores recorder data and synchronized phasor, quality of power supply result of calculation into memory, when
After recording terminates, the recorder data, synchronized phasor and power quality data are transferred in main website server by primary processor again.
When monitoring terminal is received to humiture and when calling survey signal together of path image, primary processor passes through temperature and humidity sensing
Device gathers current line temperature and circuit ambient air humidity information, by microcam shoot present terminal along before circuit,
Afterwards with the view data of underface, and data are stored in high-speed internal memory for the time being, do not influenceing to supervise circuit electrical quantity parameter
In the case of survey, humiture and path image information are sent to main website server by primary processor.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, model not is protected to the present invention
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deformation that creative work can make still within protection scope of the present invention.
Claims (15)
1. a kind of distribution overhead line synchronous phasor measurement and operational monitoring terminal, it is characterized in that, including closed shell, it is described
Monitoring modular, recording module and power module are provided with housing；
The recording module includes recording processor, analog signal collector, sampling current transformer and electric field strength transducer[sensor,
The sample rate current sensor is used for measurement circuitry electric current, and the electric field strength transducer[sensor is used for measurement circuitry electric-field intensity, institute
Analog signal collector is stated to be used to gather line current signal and electric-field intensity sensing from the sample rate current sensor
Electric field intensity signal is gathered in device, and signal will be collected and be converted into data signal, the recording processor receives analog signal
Line current signal and electric field intensity signal after collector conversion, and utilize the line current signal and electric field intensity signal
Calculate synchronized phasor and the quality of power supply；
The monitoring modular, for obtaining line current signal, electric field intensity signal, synchronized phasor and the electricity from recording module
Energy quality, and pass through network cable transmission to main website server；
The power module, for providing suitable power supply to recording module and monitoring modular.
2. a kind of distribution overhead line synchronous phasor measurement according to claim 1 and operational monitoring terminal, it is characterized in that,
The recording module also includes alignment system, and the recording processor obtains synchronizing clock signals in real time by alignment system, and
The recorder data of analog signal collector is read according to synchronizing clock signals, the alignment system includes GPS system or the Big Dipper is led
Boat system.
3. a kind of distribution overhead line synchronous phasor measurement according to claim 1 and operational monitoring terminal, it is characterized in that,
The monitoring modular includes master controller, Temperature Humidity Sensor, microcam, communication module and memory, the humiture
Sensor is used for measurement circuitry skin temperature and circuit ambient air humidity, and the microcam is used for camera terminal circumferential wire
Paths ambient image information, the master controller are used to gather temperature-humidity signal in Temperature Humidity Sensor, in microcam
The data-signal of ambient image signal and recording module transfer, and store in memory, master controller will by communication module
The data signal transmission of collection is to main website server.
4. a kind of distribution overhead line synchronous phasor measurement according to claim 3 and operational monitoring terminal, it is characterized in that,
The communication module includes ethernet communication device and GPRS communicators, and the master controller is led to by ethernet communication device and GPRS
Letter device carries out data transmission with main website server.
5. a kind of distribution overhead line synchronous phasor measurement according to claim 3 and operational monitoring terminal, it is characterized in that,
The communication module also includes infrared communication device, and the master controller is led to by infrared communication device and man-hour manually hand-held terminal
News,.
6. a kind of distribution overhead line synchronous phasor measurement according to claim 3 and operational monitoring terminal, it is characterized in that,
The quantity of the microcam is 3, is separately positioned on the both sides and bottom of housing.
7. a kind of distribution overhead line synchronous phasor measurement according to claim 1 and operational monitoring terminal, it is characterized in that,
The power module includes power supervisor, power taking current transformer, super capacitor and lithium battery, and the power supervisor passes through
From circuit power taking, and by power storage into the super capacitor, the lithium battery is used to be used as standby power taking current transformer
Power supply.
8. a kind of distribution overhead line synchronous phasor measurement according to claim 1 and operational monitoring terminal, it is characterized in that,
The bottom of the housing is additionally provided with warning light, when there is out-of-limit generation, passes through main controller controls warning light automatic alarm.
9. a kind of distribution overhead line synchronous phasor measurement according to claim 1 and operational monitoring terminal, it is characterized in that,
The housing is made up of upper shell and lower house two parts, and the upper shell and lower house are bolted to connection.
10. a kind of distribution overhead line synchronous phasor measurement according to claim 9 and operational monitoring terminal, its feature
It is to be provided with spring pressuring plate on the face relative with upper shell on the lower house.
A kind of 11. work side of distribution overhead line synchronous phasor measurement and operational monitoring terminal based on described in claim 1
Method, it is characterized in that, comprise the following steps：
Step 1：Initialization apparatus, by primary processor periodically collection circuit environmental information data and store into memory,
And by communication module by line environment uploading information data to main website server；
Step 2：Judge whether circuit meets recording entry condition, if being unsatisfactory for recording entry condition, into step:3, if full
Sufficient recording entry condition, then into step 4；
Step 3：By analog signal collector periodically collection line current and electric-field intensity data and it is transferred to recording processing
Device, recording processor calculate electric current and electric-field intensity virtual value according to the line current and electric-field intensity data that receive and passed
Master controller is defeated by, after master controller stores the electric current of acquisition and electric-field intensity virtual value, by communication module by line electricity
Stream and electric-field intensity virtual value are uploaded to main website server, return to step 2；
Step 4：Open alignment system to position in real time, analog signal collector produces A/D according to the sample frequency set and changed
Control sequential, gathers line current and electric-field intensity data, and recording processor selects according to the sample frequency of setting from each cycle
Fractional-sample point is taken to carry out synchronized phasor calculating, remaining sampled point carries out quality of power supply calculating, and by line current, electric-field intensity
Data and result of calculation are transmitted to master controller, and master controller is by the data Cun Chudao memories received；
Step 5：After recording terminates, master controller is passed line current, electric-field intensity data and result of calculation by communication module
Deliver to main website server.
12. the method for work of distribution overhead line synchronous phasor measurement according to claim 11 and operational monitoring terminal,
It is characterized in that in the step 1, the condition that recording starts includes：(1) the out-of-limit startup of A, B, C three-phase electric field strength Sudden Changing Rate；
(2) the out-of-limit startup of A, B, C three-phase current Sudden Changing Rate；(3) the out-of-limit startup of zero-sequence current Sudden Changing Rate；(4) the out-of-limit startup of harmonic wave；(5)
Remote control is called survey together and started.
13. the method for work of distribution overhead line synchronous phasor measurement according to claim 11 and operational monitoring terminal,
It is characterized in that in the step 4, the synchronized phasor includes electric current phasor and frequency, the quality of power supply include frequency departure,
Harmonic wave and three-phase imbalance amount.
14. the method for work of distribution overhead line synchronous phasor measurement according to claim 11 and operational monitoring terminal,
It is characterized in that in the step 4, the computational methods of the synchronized phasor are：
If line current signal is
Wherein, X (t) is the continued time domain signal of electric current；X is current effective value；ω is angular speed；For initial phase angle；
Represented with vector form
<mrow>
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<mover>
<mi>X</mi>
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</mfrac>
<munderover>
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<mrow>
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</mrow>
<mrow>
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</munderover>
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</mrow>
<mrow>
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</mrow>
</munderover>
<msub>
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<mn>2</mn>
<mi>&pi;</mi>
</mrow>
<mi>N</mi>
</mfrac>
<mi>k</mi>
<mo>=</mo>
<msub>
<mi>X</mi>
<mi>R</mi>
</msub>
<mo>-</mo>
<msub>
<mi>jX</mi>
<mi>I</mi>
</msub>
</mrow>
<mrow>
<mover>
<mi>X</mi>
<mo>&OverBar;</mo>
</mover>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<msqrt>
<mn>2</mn>
</msqrt>
</mfrac>
<mi>j</mi>
<msub>
<mover>
<mi>X</mi>
<mo>&OverBar;</mo>
</mover>
<mn>1</mn>
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<mo>=</mo>
<mfrac>
<mn>1</mn>
<msqrt>
<mn>2</mn>
</msqrt>
</mfrac>
<mi>j</mi>
<mrow>
<mo>(</mo>
<msub>
<mi>X</mi>
<mi>R</mi>
</msub>
<mo>+</mo>
<msub>
<mi>X</mi>
<mi>I</mi>
</msub>
<mo>)</mo>
</mrow>
</mrow>
Wherein,For electric current phasor；For the fundamental phasors drawn by Fourier transformation；XRFor phasor real part, XIFor imaginary part；N
For phasor sampled point (N=50, k=1,2 ... N), xkFor sampling point value；
Sampling frequency deviation is
Wherein, current respective value is used as using last phasor amplitude, phase angle.
Sample frequency is
f1=fN+Δf
fNFor system benchmark rated frequency.
15. the method for work of distribution overhead line synchronous phasor measurement according to claim 11 and operational monitoring terminal,
It is characterized in that in the step 4, the computational methods of the quality of power supply are：
Frequency departure is：
Δ f=fT-50
Wherein, fTFor measurement frequency in time of measuring window, equal to the average value of frequency real time data in time T；
Nth harmonic electric current containing ratio HRInFor
<mrow>
<msub>
<mi>HRI</mi>
<mi>n</mi>
</msub>
<mo>=</mo>
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<mn>1</mn>
</msub>
</mfrac>
<mo>&times;</mo>
<mn>100</mn>
<mi>%</mi>
</mrow>
Wherein, InFor n-th harmonic current effective value, I1For fundamental current virtual value；
Current total harmonic distortion rate THDIFor
<mrow>
<msub>
<mi>THD</mi>
<mi>I</mi>
</msub>
<mo>=</mo>
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</mrow>
Three-phase current unbalance degree is
<mrow>
<msub>
<mi>&epsiv;</mi>
<mi>I</mi>
</msub>
<mo>=</mo>
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</mrow>
Wherein, I1、I2The respectively positive-sequence component and negative sequence component of line current, according to three-phase fundamental current vector data, utilize
Positive and negative, zero-sequence current component is calculated in symmetrical component method, brings above formula into and calculates three-phase current unbalance degree.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336826A (en) * | 2018-04-09 | 2018-07-27 | 厦门远通电子技术有限公司 | A kind of power distribution network synthesis distribution terminal |
| CN108802490A (en) * | 2018-06-25 | 2018-11-13 | 中国石油大学(华东) | A kind of plesiochronous startup of harmonic wave on-line monitoring terminal under the conditions of no clock synchronization and synchronization data obtaining method |
| CN108871449A (en) * | 2018-07-13 | 2018-11-23 | 广东电网有限责任公司江门供电局 | A kind of transmission line online monitoring system with electric field monitoring |
| CN108983044A (en) * | 2018-08-06 | 2018-12-11 | 北京恒源利通电力技术有限公司 | The synchronous Wave record method of overhead transmission line three-phase current based on RF wireless telecommunications |
| CN109031036A (en) * | 2018-05-04 | 2018-12-18 | 喻永贵 | A kind of synchronized phasor line protective devices and its measurement method based on IEC61850 standard |
| CN109119903A (en) * | 2018-08-01 | 2019-01-01 | 南方电网科学研究院有限责任公司 | Power distribution network runs pilot switch cabinet and synchronous phasor measurement system |
| CN109521275A (en) * | 2018-11-23 | 2019-03-26 | 南方电网科学研究院有限责任公司 | A kind of synchronized phasor determines method, system, device and readable storage medium storing program for executing |
| CN110649593A (en) * | 2019-08-13 | 2020-01-03 | 国电南瑞科技股份有限公司 | Miniature synchronous phasor measuring device for power distribution network |
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| CN111308201A (en) * | 2020-03-12 | 2020-06-19 | 国网山东省电力公司潍坊供电公司 | Distributed wave recording system integrating small-current grounding line selection function |
| CN113587996A (en) * | 2021-08-06 | 2021-11-02 | 广东电网有限责任公司 | System and method for sensing full-operation working condition of overhead line of distribution network |
| CN115629235A (en) * | 2022-10-25 | 2023-01-20 | 广西电网有限责任公司钦州供电局 | Power data monitoring system and method based on intelligent phase voltammeter |
| RU2798391C1 (en) * | 2022-10-26 | 2023-06-22 | Федеральное государственное бюджетное научное учреждение Федеральный научный агроинженерный центр ВИМ (ФГБНУ ФНАЦ ВИМ) | Measuring complex for time-synchronized measurements of parameters of electrical network operation modes |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101097653A (en) * | 2007-07-17 | 2008-01-02 | 东北大学 | Electric energy quality and electrical power system malfunction detection wave recording device and method |
| CN101692104A (en) * | 2009-09-28 | 2010-04-07 | 深圳市双合电脑系统股份有限公司 | Power quality and synchronized phasor monitoring device for power system |
| CN201639363U (en) * | 2010-03-25 | 2010-11-17 | 国电南瑞科技股份有限公司 | Comprehensive three-state data measuring and control device for intelligent transformer station |
| CN202614876U (en) * | 2012-06-05 | 2012-12-19 | 国电南瑞科技股份有限公司 | Integrated device of electric energy quality monitoring and fault recording |
| CN103490516A (en) * | 2013-10-15 | 2014-01-01 | 国家电网公司 | Power distribution automation feeder terminal with fault wave recording function and method thereof |
| CN106226591A (en) * | 2016-10-10 | 2016-12-14 | 山东大学 | Power distribution network synchronized phasor and quality of power supply Integrated Monitoring System and method |
| CN205880117U (en) * | 2016-07-29 | 2017-01-11 | 广东粤恒电力科技有限公司 | Power distribution network overhead line fault monitoring device |
-
2017
- 2017-07-31 CN CN201710638921.4A patent/CN107607805A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101097653A (en) * | 2007-07-17 | 2008-01-02 | 东北大学 | Electric energy quality and electrical power system malfunction detection wave recording device and method |
| CN101692104A (en) * | 2009-09-28 | 2010-04-07 | 深圳市双合电脑系统股份有限公司 | Power quality and synchronized phasor monitoring device for power system |
| CN201639363U (en) * | 2010-03-25 | 2010-11-17 | 国电南瑞科技股份有限公司 | Comprehensive three-state data measuring and control device for intelligent transformer station |
| CN202614876U (en) * | 2012-06-05 | 2012-12-19 | 国电南瑞科技股份有限公司 | Integrated device of electric energy quality monitoring and fault recording |
| CN103490516A (en) * | 2013-10-15 | 2014-01-01 | 国家电网公司 | Power distribution automation feeder terminal with fault wave recording function and method thereof |
| CN205880117U (en) * | 2016-07-29 | 2017-01-11 | 广东粤恒电力科技有限公司 | Power distribution network overhead line fault monitoring device |
| CN106226591A (en) * | 2016-10-10 | 2016-12-14 | 山东大学 | Power distribution network synchronized phasor and quality of power supply Integrated Monitoring System and method |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336826A (en) * | 2018-04-09 | 2018-07-27 | 厦门远通电子技术有限公司 | A kind of power distribution network synthesis distribution terminal |
| CN109031036A (en) * | 2018-05-04 | 2018-12-18 | 喻永贵 | A kind of synchronized phasor line protective devices and its measurement method based on IEC61850 standard |
| CN108802490B (en) * | 2018-06-25 | 2020-08-28 | 中国石油大学(华东) | Quasi-synchronous starting and synchronous data acquisition method for harmonic on-line monitoring terminal under time-alignment-free condition |
| CN108802490A (en) * | 2018-06-25 | 2018-11-13 | 中国石油大学(华东) | A kind of plesiochronous startup of harmonic wave on-line monitoring terminal under the conditions of no clock synchronization and synchronization data obtaining method |
| CN108871449A (en) * | 2018-07-13 | 2018-11-23 | 广东电网有限责任公司江门供电局 | A kind of transmission line online monitoring system with electric field monitoring |
| CN109119903A (en) * | 2018-08-01 | 2019-01-01 | 南方电网科学研究院有限责任公司 | Power distribution network runs pilot switch cabinet and synchronous phasor measurement system |
| CN108983044A (en) * | 2018-08-06 | 2018-12-11 | 北京恒源利通电力技术有限公司 | The synchronous Wave record method of overhead transmission line three-phase current based on RF wireless telecommunications |
| CN108983044B (en) * | 2018-08-06 | 2021-02-19 | 北京恒源利通电力技术有限公司 | Overhead line three-phase current synchronous wave recording method based on RF wireless communication |
| CN109521275A (en) * | 2018-11-23 | 2019-03-26 | 南方电网科学研究院有限责任公司 | A kind of synchronized phasor determines method, system, device and readable storage medium storing program for executing |
| CN110649593A (en) * | 2019-08-13 | 2020-01-03 | 国电南瑞科技股份有限公司 | Miniature synchronous phasor measuring device for power distribution network |
| CN111273127A (en) * | 2020-01-22 | 2020-06-12 | 广东电网有限责任公司广州供电局 | Method and device for processing D-PMU fault wave recording data of power distribution network |
| CN111273127B (en) * | 2020-01-22 | 2023-02-17 | 广东电网有限责任公司广州供电局 | Method and device for processing D-PMU fault wave recording data of power distribution network |
| CN111308201A (en) * | 2020-03-12 | 2020-06-19 | 国网山东省电力公司潍坊供电公司 | Distributed wave recording system integrating small-current grounding line selection function |
| CN113587996A (en) * | 2021-08-06 | 2021-11-02 | 广东电网有限责任公司 | System and method for sensing full-operation working condition of overhead line of distribution network |
| CN115629235A (en) * | 2022-10-25 | 2023-01-20 | 广西电网有限责任公司钦州供电局 | Power data monitoring system and method based on intelligent phase voltammeter |
| RU2798391C1 (en) * | 2022-10-26 | 2023-06-22 | Федеральное государственное бюджетное научное учреждение Федеральный научный агроинженерный центр ВИМ (ФГБНУ ФНАЦ ВИМ) | Measuring complex for time-synchronized measurements of parameters of electrical network operation modes |
| CN117741235A (en) * | 2023-12-18 | 2024-03-22 | 南方电网调峰调频发电有限公司检修试验分公司 | Current signal detection system |
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