CN207638406U - A kind of medium voltage switchgear equipment intelligence control system with wide area synchro measure function - Google Patents
A kind of medium voltage switchgear equipment intelligence control system with wide area synchro measure function Download PDFInfo
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Abstract
The utility model discloses a kind of medium voltage switchgear equipment intelligence control systems with wide area synchro measure function, including switchgear control system and several switchgears, each switchgear is independently used as switching station terminal equipment or Feeder Terminal Unit to interconnect, switchgear control system includes the function expanding module being connected to by inside switch cabinet bus and accurate clock line on main control module, switchgear is connected by Phototube Coupling fieldbus with main control module, switchgear control system is connected by main control module with higher level's distribution main station system, power module and locating module are also associated on main control module, the utility model simplifies internal system interconnection architecture, and has Function Extension ability, greatly simplify the line core interconnection quantity of each switchgear, meet requirement of the intelligent grid to equipment communication capacity.
Description
Technical field
The utility model is related to a kind of switchgear control system, more particularly to a kind of Intelligent switch cabinet controller.
Background technology
With the drastically expansion of the high speed development and the means of livelihood of Chinese national economy, social production present situation is to power transmission and distribution
Quality requirement is higher and higher.Using ring main unit, pole-mounted circuit breaker, column load switch as the middle pressure primary equipment of representative and with DTU,
FTU, TTU, RTU are that the secondary measuring and controlling equipment of representative is applied widely in middle voltage distribution networks automation solutions, but is passed through
Operative practice after a period of time, it is this be based on first and second equipment combination made of distribution automation solution also expose
The new problem of some urgent need to resolve, mainly has：
One secondary device separates design and assembly, and there are many hidden danger.Since first and second equipment is set respectively by different vendor
Installation and debugging are combined in user terminal, generally existing is because of service life, interface is incompatible, wiring mixes redundancy etc. after meter manufacture
Reason causes the unmatched problem of first and second equipment, the source of failure can not be efficiently investigated again after accident generation, thus cannot
Accident responsibility is divided in time, and the fault restoration period is longer.
Progress of the secondary device in terms of monitoring management function is slower.Current secondary device does not have middle pressure transmission of electricity generally
The software and hardware condition that circuit line loss accurately manages cannot achieve 10 kilovolts of same period separated time Controlling line loss and line loss " four points "（Subregion,
Partial pressure, divides taiwan area at subelement）Management by synchronization target.
Telesignalling dithering problem not yet solves.The time reference of switchgear is realized using the master clock method of synchronization at present, but
Since clock synchronization is realized by communications command mode, there are larger transmission delay and clock synchronization error, lead to system mode
When variation, the action sequence record for being associated with switch does not conform to the actual conditions, and is especially reflected on the telesignalling dithering of remote signalling data.
Power distribution network topological structure is complicated, and fault location is always a difficult point.Past artificial line malfunction elimination side
Formula heavy workload, time-consuming, can not restore electricity in a short time.Currently, the Fault Locating Method based on transient state travelling wave has relatively by force
Adaptability and higher positioning accuracy, but for more complex distribution network structure, tradition is single-ended and the positioning of both-end traveling wave
The calculating error of method can significantly affect the reliability of positioning result, although and traditional multiterminal traveling wave positioning mode strong applicability, no
There are problems that pseudo-fault point, but still needs to carry out complicated matrix calculating, it is difficult to effectively application.
To solve the above problem of 10 KV distribution networks, just actively pushing forward medium voltage distribution network one in the case where national grid is leading
The formulation and implementation of the relevant policy of secondary device depth integration and technical specification, but Related product domestic at present there is no method same
When meet above-mentioned functional requirement.
Utility model content
The purpose of this utility model is to provide a kind of medium voltage switchgear equipment intelligent control with wide area synchro measure function
System, to solve the above-mentioned technical problem about switchgear controller at present.
What the purpose of this utility model was realized in：A kind of medium voltage switchgear equipment intelligence with wide area synchro measure function
Energy control system, which is characterized in that including switchgear control system and several switchgears, each switchgear is independently used as and opens
Close institute's terminal device or Feeder Terminal Unit interconnect, the switchgear control system include by inside switch cabinet bus and
Accurate clock line is connected to the function expanding module on main control module, and the switchgear is total by Phototube Coupling scene
Line is connected with main control module, and the switchgear control system is connected by main control module with higher level's distribution main station system, institute
It states and is also associated with power module and locating module on main control module.
As further limiting for the utility model, the function expanding module includes measuring protection module, equipment and line
Line state amount monitoring modular, fault location module, ambient condition amount monitoring modular.
As further limiting for the utility model, the main control module uses ARM-Cortex-M4 for the place of core
Device is managed, the function expanding module detects the sensing that signal is installed by function expanding module front end using DSP as acp chip
Device and detection device access to ARM processing through DSP by internal fieldbus, while ARM is also by accurate clock line
DSP function modules provide time scale information, to realize the intellectual monitoring function of equipment state.
As further limiting for the utility model, the function of the switchgear control system includes：
Duplex high precision data acquire, and equipment and line status amount monitoring modular are responsible for acquiring three-phase voltage, the electricity of circuit
Stream and residual voltage and electric current, monitoring device distribute the working condition of electric energy, it is by being digitized line voltage distribution, electric current
It measures, obtains the operating parameter of circuit in real time, in combination with the accurate submicrosecond grade markers of time reference synchronizing function, complete line
Road running wastage accurately calculates；
Multi-way switching values input/output is connected to the switchgear on main control module by Phototube Coupling bus and completes
The acquisition and control of switching devices switching signal obtain and record the state parameter of a switchgear in real time；
Multichannel multimode communicates, and main control module provides a variety of communications with each module and the connection type of switchgear
Channel and communication protocol realize that the timely upload of measuring and control data is assigned, meet requirement of the intelligent grid to equipment communication capacity, and
By internet, technology of Internet of things hardware integration to intelligent controller in, each switchgear can be interconnected by fieldbus, make to set
For with the condition to interconnect and networked operation is safeguarded, change and innovation for distribution operation mode from now on provide support；
Time reference synchronizes, and locating module provides sub-micro grade using GPS, the Big Dipper, network clocking standard time clock for equipment
Synchronised clock and accurate time tag and geography information；
Multipath high-speed data acquire, equipment and line status amount monitoring modular be responsible for recording the transient-wave of malfunction,
Local discharge signal is struck by lightning and the transient signals wave spectrograms such as switching overvoltage, in combination with the accurate Asia of time reference synchronizing function
Microsecond grade markers makes corresponding intermediate distribution system be provided simultaneously with Real-time Monitoring Data under normal operating condition and malfunction
Wide area Synchronization Analysis ability；
Pulse power is injected, and fault location module is by injecting power pulse signal, in the case of system dead electricity, especially
When being on-line checking buried cable fault point, the monitoring and positioning of line fault can be effectively realized；
Operating mechanism condition monitoring, function expanding module are responsible for monitoring the actuation time of operating mechanism, movement speed, row
The state parameters such as journey, spring are combined with multi-way switching values input/output function, obtain the operation shape of switchgear itself in real time
State；
Facility environment temperature humidity monitors, and ambient condition amount monitoring modular is responsible for ring around the equipment such as monitoring temperature, humidity
Border parameter is timely feedbacked to intelligent control platform and distribution network system backstage, so that control system makes corresponding decision in time, in advance
It is anti-condensation；
It is expansible, upgrading extension can be carried out as needed, in addition to basic man-machine interface and visualization model, can also be added
The extension work(such as temperature of cable junction measurement, contact temperature measurement, the monitoring of gas leakage measuring instrumentation, leakage current test, electrical contact endurance
Energy.
It is the acquisition of duplex high precision data, multi-way switching values input/output, more as further limiting for the utility model
Channel multimode communication, multipath high-speed data acquisition, pulse power injection, facility environment temperature humidity monitoring, it is expansible with
The form of module is realized.
As further limiting for the utility model, the locating module realizes the time to realize that time reference is unified
The method of unifying datum is：
Step 1）Real-time time location information and fine timing clock signal are extracted by locating module；
Step 2）Timi requirement information is sent to main control module by serial ports, fine timing clock signal passes through PPS
The form of pulse signal is differential to send function expanding module to.
As further limiting for the utility model, the equipment and line status amount monitoring modular to carry out voltage,
Current measurement；By 16 road AC analogue measurements, using different ADC working methods, the high and low of corresponding inlet wire is obtained respectively
Fast voltage, current data, the transient waveforms such as running state parameter, failure and switch motion to obtain circuit or equipment are real
Present condition monitors and fault location；For the parameters such as node voltage U, electric current I, power P and Q, generator rotor angle cos φ, ADC only need to be controlled
Under the operating mode of low speed sampling, each period acquires 256 points；For real-time voltage/current waveform, switch motion and event
Hinder the parameters such as waveform, ADC need to be made to be operated under the high-speed sampling pattern of 1MHz；Curent change range is big when in view of failure,
When design protection measure, photoelectric coupling amplification treatment circuit is accessed, ensures that measuring circuit can be the 10 ~ 20 of running current
Reliability service under times.
As further limiting for the utility model, the fault location module injects fault location signal by PT/CT,
That is high frequency power pulse signal, the high-speed synchronous transient data that when combination failure records, by both-end and multiterminal method to traveling wave number
According to processing, to realize the quick positioning of failure.
As further limiting for the utility model, pulse injection mode is used when injecting high frequency power pulse signal,
The t1 moment sends out wave signal, and signal measures back wave at failure point reflection, t2 moment, then has δ t=t1-t2；So fault point is arrived
The distance l of test point is t × c '/2 l=δ, and wherein c ' is detection velocity of electromagnetic wave.
Compared with prior art, the beneficial effects of the utility model are, the utility model use miniaturization, low-power consumption with
And non-maintaining technical measures are to improve equipment dependability and stability；The main control module of each intelligent control platform use with
ARM-Cortex-M4 is the processor of core, and the processor is small, and low energy consumption, cost-effective, powerful, in communication, is shown
Show and is used widely with fields such as observing and controlling；Meanwhile function expanding module uses the control chip using DSP as core, the chip
Energy consumption is relatively low, possesses multiple bus architecture, pile line operation mode, specialized hardware multiplier and quick instruction cycle, is suitable for
Multi-host parallel system, operational precision is very high, acquires and is effectively treated convenient for data high-speed；
Locating module is used in distribution network terminal equipment for the first time（The Big Dipper, GPS）Etc. between a variety of Service of Timing Unified Devices
Time reference, ensure the reliable, accurate of time reference with uniformly, can solve the problems, such as presently, there are telesignalling dithering, and make equipment
Has the software and hardware condition that transmission line of electricity line loss accurately manages；
By adding submicrosecond precise time label to circuit high speed measurement data, equipment partial discharge, transmission line of electricity thunder are realized
Overvoltage, the real time on-line monitoring function of switching overvoltage are hit, in combination with high-speed power impulses injection technology, is realized to dead electricity
The fast positioning function of the transmission line of electricity of state especially buried cable class transmission line malfunction, improve troubleshooting efficiency and
Accuracy solves the problems, such as to lead to that the troubleshooting period is long, complexity is high presently, there are can not precisely confirm position of failure point；
System design uses two-stage bus structures（Phototube Coupling fieldbus, inside switch cabinet fieldbus）, realize
DTU/FTU（Switching station terminal equipment/Feeder Terminal Unit）Switchgear network management；Core processor passes through internal only logical
It crosses internal fieldbus and accurate clock line is connected with each function module, simplify internal system interconnection architecture, and have
Function Extension ability；The multimode means of communication of multichannel is provided, no longer needs ad hoc DTU/FTU cabinets in power supply station, switching station,
Each switchgear can set it to the intelligent controller with DTU/FTU functions by software, and switchgear cabinet is except communication
Line is outer to be interconnected without other wiring, is greatly simplified line-core interconnection quantity of each switchgear, is met intelligent grid and communicated to equipment
The requirement of ability, and internet, technology of Internet of things are integrated into project equipment function makes equipment have interconnection, intercommunication and mutually
The networked operation changed safeguards condition, and change and innovation for distribution operation mode from now on provide support.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model hardware system platform.
Fig. 2 is technical functionality block diagram included in the utility model.
Fig. 3 is the precise time unified approach schematic diagram in the utility model.
Fig. 4 is the current measurement scheme schematic diagram in the utility model.
Fig. 5 is the voltage measurement scheme schematic diagram in the utility model.
Fig. 6 is the pulse power injection technique scheme schematic diagram that the utility model utilizes PT/CT.
Specific implementation mode
The utility model is described in further detail with example below in conjunction with the accompanying drawings, but is not intended as new to this practicality
Type does the foundation of any restrictions.
As shown in Figure 1, the utility model proposes a kind of, the medium voltage switchgear equipment with wide area synchro measure function is intelligently controlled
System processed, including multiple switch cabinet control system are connected with several switchgears in each switchgear control system, each to switch
Equipment is independently used as switching station terminal equipment or Feeder Terminal Unit to interconnect, and the switchgear control system includes by opening
It closes cabinet internal bus and accurate clock line is connected to the function expanding module on main control module, the function expanding module
Including measuring protection module, equipment and line status amount monitoring modular, fault location module, ambient condition amount monitoring modular, institute
It states switchgear by Phototube Coupling fieldbus to be connected with main control module, each switchgear control system passes through master control molding
Block is connected with higher level's distribution main station system, and power module and locating module are also associated on the main control module；Control unit
Using multinuclear uniprocessor structure（DSP+ARM）, it can be achieved that man-machine interface, time reference, a variety of communication functions access and it is more
Kind monitoring function, and corresponding function extension can be carried out according to the following observing and controlling function needs；In switchgear control where the controller
In system processed, each switchgear has the function of interconnection, intercommunication and exchanges, and is conveniently designed, produces and manages；Each
Switchgear all has the function of DTU/FTU, is interconnected without other wiring in addition to connection, greatly simplifies each switchgear
Line-core interconnects quantity；The main control module of switchgear control system is used and is answered extensively in fields such as communication, display and observing and controlling
The ARM-Cortex-M4 used as core processor, meanwhile, each switchgear control system can also pass through the main control module
Communication interface is communicated with higher level's power distribution automation main station system；In addition to the non-control module such as power module and locating module,
Each function expanding module is used in the widely applied DSP of digital processing field as control chip, and detection signal passes through
The sensor and detection device of front end installation, access to ARM processing, while ARM also leads to through DSP by inside switch cabinet fieldbus
It crosses accurate clock line and provides time scale information for DSP function modules, to realize the intellectual monitoring function of equipment state.
As shown in Fig. 2, the major function and technological means of intelligent control platform are as follows in the utility model：
Duplex high precision data acquisition module is responsible for acquiring three-phase voltage, electric current and the residual voltage and electric current of circuit, prison
Measurement equipment distributes the working condition of electric energy, it obtains the fortune of circuit in real time by being digitized measurement to line voltage distribution, electric current
Row parameter completes accurately calculating for circuit running wastage in combination with the accurate submicrosecond grade markers of time reference synchronization module；
Multi-way switching values input/output module completes the acquisition and control of switching devices switching signal, obtains in real time simultaneously
The state parameter of record switchgear；
Multichannel multimode communication module provides a variety of communication channels and communication protocol, realizes the timely upload of measuring and control data
It assigns, meets requirement of the intelligent grid to equipment communication capacity, and the hardware integration of internet, technology of Internet of things is controlled to intelligence
In device processed, each switchgear can be interconnected by fieldbus, make equipment have interconnect and networked operation safeguard condition,
There is provided support for the change and innovation of distribution operation mode from now on, and using the utility model proposes communication technology scheme
Afterwards, no longer need ad hoc DTU cabinets, each switchgear that can be set it to by software with DTU work(in power supply station, switching station
The intelligent controller of energy；
Time reference synchronization module provides the same of sub-micro grade using standard time clocks such as GPS, the Big Dipper, network clockings for equipment
Walk clock and accurate time tag and geography information；
Multipath high-speed data acquisition module is responsible for recording the transient-wave of malfunction, local discharge signal lightning stroke and operation
The transient signals wave spectrogram such as overvoltage, in combination with the accurate submicrosecond grade markers of time reference synchronization module, in making accordingly
Press-fitting electric system is provided simultaneously with the wide area Synchronization Analysis ability of Real-time Monitoring Data under normal operating condition and malfunction；
Pulse power injection module is by injecting power pulse signal, in the case of system dead electricity, especially online inspection
Under geodetic when Method of Cable Trouble Point, the monitoring and positioning of line fault can be effectively realized；
Operating mechanism monitoring module is responsible for monitoring the shapes such as actuation time, movement speed, stroke, the spring of operating mechanism
State property is combined with multi-way switching values input/output module, obtains the operating status of switchgear itself in real time；
Facility environment temperature humidity monitoring modular is responsible for the equipment ambient enviroment parameter such as monitoring temperature, humidity, timely feedbacks
It is pre- anti-condensation so that control system makes corresponding decision in time to intelligent control platform and distribution network system backstage；
Extensible modules can carry out upgrading extension and may be used also in addition to basic man-machine interface and visualization model as needed
Add the expansions such as temperature of cable junction measurement, contact temperature measurement, the monitoring of gas leakage measuring instrumentation, leakage current test, electrical contact endurance
Open up function；
In addition, the utility model is meeting country herein in connection with management use and the programming of communication protocol to time signal
On the basis of power grid, south electric network are to DTU, FTU functional requirement, the depth of first and second function of medium voltage distribution network device level is realized
（It is seamless）Fusion.
As shown in figure 3, a kind of time reference uniform technical scheme can be achieved in the utility model；This scheme uses GPS/
Big Dipper timing technology is realized, passes through locating module and its external antenna extracts the real-time time location information and essence of the GPS/ Big Dippeves
Close timing clock signal, in fact constantly between location information ARM main control modules are transmitted to by serial ports, and fine timing clock signal
Each function expanding module is sent to by differential in the form of PPS pulse signals.On the one hand, each sub switch cabinet is controlled and is
System, the unified time of the time information commons GPS/ Big Dipper can reach synchronous at the different nodes of middle voltage distribution networks circuit, protect
Demonstrate,proving each monitoring node acquisition signal while property can also accurately calculate convenient for accurately calculating the loss of each node sectionalized line
The transmission time difference δ t of fault traveling wave signal, to realize the accurate quick positioning of fault point；On the other hand, for general fixed
Position module（The Big Dipper/GPS）, the pulse front edge of PPS signal can reduce in 60 ns or so by using Differential Driving technology
Drive level needed for the timer clock pulse transmission process increases transmission electric current, to reduce the transmission of the clock signal
Delay, ensures the exact time synchronization of each function module measurement data, and then can add to each measurement data of line node
Add accurate time tag, so that each function module inside equipment is had the accurate function of monitoring and calculate, especially for switch
The transient state condition monitoring of the signals such as amount and analog quantity；In addition, the utility model proposes time unification technical solution to remote signalling number
Timing accuracy according to monitoring is submicrosecond grade, and has accurate markers, this solves accurate line loss for intermediate distribution system and measures
And telesignalling dithering problem provides hardware condition, can also realize wide area monitoring in complicated MV distribution systems monitoring application
The synchronization of data.Importantly, the program combines together with function is measured, do not increase the complexity of cost and detection.
As shown in Figure 4 and Figure 5, the utility model provides a kind of current measurement and a kind of voltage measurement scheme respectively；It is logical
16 road AC analogue measurements are crossed, using different ADC working methods, obtain high, low speed voltage, the electric current of corresponding inlet wire respectively
Data, the transient waveforms such as running state parameter, failure and switch motion to obtain circuit or equipment, realize status monitoring and
Fault location.For the parameters such as node voltage U, electric current I, power P and Q, generator rotor angle cos φ, only it need to control what ADC was sampled in low speed
Under operating mode, each period acquires 256 points；For ginsengs such as real-time voltage/current waveform, switch motion and fault waveforms
Amount, need to be such that ADC is operated under the high-speed sampling pattern of 1MHz；In addition, it is contemplated that curent change range is big when failure, protected in design
When shield measure, photoelectric coupling amplification treatment circuit is accessed, ensures that measuring circuit can under 10 ~ 20 times of running current
By operation.
As shown in fig. 6, the utility model also provides a kind of high-frequency impulse power injection technique using PT/CT；The technology
Scheme master is suitable under system power failure state, and the transmission line malfunction of especially buried cable class quickly positions；The program passes through
PT/CT injects fault location signal, i.e. high frequency power pulse signal, and the high-speed synchronous transient data that when combination failure records is led to
Both-end and multiterminal method are to traveling wave data processing, to realize the quick positioning of failure；To ensure effective transmission of positioning signal, this
Pulse injection mode, t are used in utility model when injected pulse1Moment sends out wave signal, and signal is in failure point reflection, t2Moment
Back wave is measured, then there are δ t=t1-t2；The distance l of so fault point to test point is t × c '/2 l=δ, and wherein c ' is detection
Use velocity of electromagnetic wave.
The utility model is not limited to above-described embodiment, on the basis of technical solution disclosed by the utility model, this
For the technical staff in field according to disclosed technology contents, not needing performing creative labour can be special to some of which technology
Sign makes some and replaces and deform, these are replaced and deformation is within the protection scope of the present utility model.
Claims (3)
1. a kind of medium voltage switchgear equipment intelligence control system with wide area synchro measure function, which is characterized in that including switch
Cabinet control system and several switchgears, each switchgear are independently used as switching station terminal equipment or Feeder Terminal Unit to interconnect
Intercommunication, the switchgear control system include being connected to main control module by inside switch cabinet bus and accurate clock line
On function expanding module, the switchgear is connected by Phototube Coupling fieldbus with main control module, the switchgear
Control system is connected by main control module with higher level's distribution main station system, and power module is also associated on the main control module
And locating module.
2. a kind of medium voltage switchgear equipment intelligence control system with wide area synchro measure function according to claim 1,
It is characterized in that, the function expanding module includes measuring protection module, equipment and line status amount monitoring modular, fault location
Module, ambient condition amount monitoring modular.
3. a kind of medium voltage switchgear equipment intelligent control system with wide area synchro measure function according to claim 1 or 2
System, which is characterized in that the main control module uses ARM-Cortex-M4 for the processor of core, the function expanding module
Using DSP as acp chip, the sensor and detection device that detection signal is installed by function expanding module front end, through DSP by
Internal fieldbus accesses to ARM processing, while ARM provides markers for DSP function modules also by accurate clock line and believes
Breath, to realize the intellectual monitoring function of equipment state.
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| CN201711235243.3A CN107863823A (en) | 2017-11-30 | 2017-11-30 | A kind of medium voltage switchgear equipment intelligence control system with wide area synchro measure function |
| CN201721636290.4U CN207638406U (en) | 2017-11-30 | 2017-11-30 | A kind of medium voltage switchgear equipment intelligence control system with wide area synchro measure function |
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| CN201711235243.3A CN107863823A (en) | 2017-11-30 | 2017-11-30 | A kind of medium voltage switchgear equipment intelligence control system with wide area synchro measure function |
| CN201721636290.4U CN207638406U (en) | 2017-11-30 | 2017-11-30 | A kind of medium voltage switchgear equipment intelligence control system with wide area synchro measure function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107863823A (en) * | 2017-11-30 | 2018-03-30 | 江苏亚开电气有限公司 | A kind of medium voltage switchgear equipment intelligence control system with wide area synchro measure function |
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| CN106773983B (en) * | 2016-12-29 | 2019-11-29 | 中国西电电气股份有限公司 | A kind of intelligence operating mechanism and control method |
| CN108736573A (en) * | 2018-06-04 | 2018-11-02 | 宁德师范学院 | A kind of multifunctional electric energy measure and control device and its investigating method |
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| CN107863823A (en) * | 2017-11-30 | 2018-03-30 | 江苏亚开电气有限公司 | A kind of medium voltage switchgear equipment intelligence control system with wide area synchro measure function |
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