CN104901311B - It is a kind of to be used to reduce the online monitoring method device of direct-current commutation failure risk - Google Patents
It is a kind of to be used to reduce the online monitoring method device of direct-current commutation failure risk Download PDFInfo
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- CN104901311B CN104901311B CN201510334865.6A CN201510334865A CN104901311B CN 104901311 B CN104901311 B CN 104901311B CN 201510334865 A CN201510334865 A CN 201510334865A CN 104901311 B CN104901311 B CN 104901311B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/128—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol
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Abstract
The present invention provides a kind of for reducing the online monitoring method device of direct-current commutation failure risk, and described device includes system primary equipment group, amplitude sensor group, phase detector group, slave computer, host computer and digital quantity processing system；The system primary equipment group is unidirectionally connected with amplitude sensor group, and be connected by electromagnetic field with phase detector group, the amplitude sensor and phase detector are unidirectionally connected with slave computer respectively, the slave computer is unidirectionally connected with host computer, and the host computer and system primary equipment group are bi-directionally connected with digital quantity processing system respectively.Compared with prior art, it is an advantage of the invention that convenient test, efficiency high, accurately measure less than 31 times each harmonics, error is less than 0.2%.
Description
Technical field
The present invention relates to a kind of online monitoring method device, and in particular to a kind of to be used to reduce the online of direct-current commutation failure risk
Measure and control device.
Background technology
Capacitance type potential transformer has the developing history of more than 40 years abroad, in 72.5~800kV power systems
It is widely used.Domestic capacitance type potential transformer since Xi-an Electric Power Capacitor Factory is born, was also accumulated from from 1964
The manufacture of 35 years and operating experience, have come to the ripening period.Especially in recent years, domestic capacitance type potential transformer is in standard
The fast saturation reactance type damper of the raising of exactness and output capacity and successfully use makes ferromagnetic resonance damping characteristic and transition
Response characteristic has breakthrough in terms of being obviously improved.Power department users it is well recognized that：Domestic capacitive battery
Pressure transformer has met or exceeded the property indices of electromagnetic potential transformer, at the same also have dielectric strength it is high, will not
With the advantages of ferromagnetic resonance occurs for system, price is relatively low under high voltage and can be used for carrier communication as coupled capacitor device.Institute
So that since " 95 ", domestic capacitance type potential transformer is used widely, and product voltage range covers 35~500kV.
110~220kV, capacitance type potential transformer consumption has had comparative advantage, and is not only preferentially selected in new website, past in old station transformation
Replace electromagnetic potential transformer toward with capacitance type potential transformer, 330~500kV grades have selected condenser type bar none
Voltage transformer.Even in 35~66kV, capacitance type potential transformer price is not dominant, it is contemplated that be inherently eliminated electricity
The ferromagnetic resonance that electromagnetic type voltage transformer is produced with system, capacitance type potential transformer has also been selected in some power stations.Nineteen ninety-five with
Come, capacitance type potential transformer volume of production and marketing is average to reach 4700 in 1998 with annual 25% rapid growth, account for 110kV and
The 90% of above voltage transformer.
During this period, with the development of power capacitor insulation technology and material science, external capacitance type potential transformer
There is significant improvement again in terms of design and manufacturing process, the developments for also having some novel products.We should be total in time
Manufacture and the operating experience of domestic and international capacitance type potential transformer are tied, further promotes the hair of domestic capacitance type potential transformer
Exhibition, urban and rural power grids construction retrofit and supergrid construction for China provide high-quality, reliable product.
Capacitance type potential transformer is mainly made up of capacitive divider and middle pressure transformer.Capacitive divider is by insulator and dress
Full of the insulating oil for keeping 0.1MPa malleations in some series capacitors composition wherein, insulator, and it is flat with steel corrugated pipe
Weighing apparatus varying environment is to keep oil pressure, and capacitance partial pressure can be used as coupled capacitor device connection carrier equipment.Middle pressure transformer is by mounted in close
Transformer, compensation reactor, arrester and damping unit composition in oil sealing case, the space nitrogen charging of top of oil-tank.First winding
It is divided into main winding and fine setting winding, a low-loss reactor of being connected between primary side and first winding.Because capacitor voltage is mutual
The nonlinear impedance of sensor and intrinsic electric capacity cause ferromagnetic resonance in capacitance type potential transformer sometimes, thus with damping
Device suppresses resonance, and damping unit is made up of resistance and reactor, is connected across in secondary winding, and damping unit has under normal circumstances
Very high impedance, when ferromagnetic resonance causes overvoltage, before middle pressure transformer is affected, reactor has been saturated a residual electricity
Resistance load, makes oscillation energy be lowered quickly.
With a large amount of accesses developed rapidly with various non-linear electrical equipments of power system, the harmonic wave of power system is asked
Topic is on the rise, and adds the pollution such as energy consumption and noise.The fast controller of the regional STATCOMs of many feed-ins of direct current and
Its harmonic wave control technology is based on the accurate measurement to harmonic wave.National standard clear stipulaties, capacitance type potential transformer cannot be used for
Harmonic measure.Go deep into the harmonic propagation characteristic and measurement error of capacitance type potential transformer, for grasping capacitor voltage comprehensively
The harmonic characterisitic of transformer, and it is all significant to seek suitable measurement error minishing method etc. on this basis.At present
The theoretical qualitative analysis stage is mostly in about the research in terms of capacitance type potential transformer harmonic propagation characteristic and measurement error,
Quantitative analysis is simultaneously not yet carried out in a deep going way with reference to actual physics experimental study, more without can apply to live facility and skill conscientiously
Art.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provide it is a kind of be used for reduce direct-current commutation failure risk
Line measure and control device, completes the online monitoring method to the regional direct-current commutation failure risk of many feed-ins of direct current.
In order to realize foregoing invention purpose, the present invention is adopted the following technical scheme that：
The present invention provides a kind of for reducing the online monitoring method device of direct-current commutation failure risk, it is characterised in that：It is described
Device includes system primary equipment group, amplitude sensor group, phase detector group, slave computer, host computer and digital quantity processing system
System；The system primary equipment group is unidirectionally connected with amplitude sensor group, and is connected by electromagnetic field with phase detector group, institute
State amplitude sensor and phase detector to be unidirectionally connected with slave computer respectively, the slave computer is unidirectionally connected with host computer, described
Host computer and system primary equipment group are bi-directionally connected with digital quantity processing system respectively.
The system primary equipment group includes system switching and transformer group；The system switching includes breaker and contact
Device；The transformer group includes voltage transformer group summation current transformer group.
The amplitude sensor group includes active AC type voltage sensor and active ac type current sensor；It is described to have
The voltage magnitude information of source AC type voltage sensor collection voltages transformer group, and the voltage magnitude information transfer of collection is given
The slave computer；The active ac type current sensor gathers the current magnitude information of current transformer group, and by collection
Current magnitude information is transferred to the slave computer.
The high pressure magnetic of the high voltage electric field information summation current transformer group of the phase detector group collection voltages transformer group
Field information, and be square wave by the finish message of collection, obtained with Zero-cross comparator method after voltage phase information and current phase information,
Voltage phase information and current phase information are transferred to the slave computer.
The phase detector group includes coil form sensor, magnetic field signal processor, magnetic field signal optical fiber, polar plate type and passed
Sensor, electric field signal processor, electric field signal optical fiber and phase operator.
The coil form sensor is placed on system primary equipment group nearby in the range of 10cm, and it is by current transformer group
High voltage magnetic field signal short range transmission gives the magnetic field signal processor, and the magnetic field signal processor enters high voltage magnetic field information
Row opto-electronic conversion obtains corresponding optical signal, magnetic field optical signal of the optical signals magnetic field signal Optical Fiber Transmission to phase operator
Receiving port；
The polar plate type sensor is placed on system primary equipment group nearby in the range of 20cm, and it is by voltage transformer group
High voltage electric field signal short range transmission gives the electric field signal processor, and the electric field signal processor enters high voltage electric field information
Corresponding optical signal is obtained after row opto-electronic conversion, the optical signals electric field signal Optical Fiber Transmission is believed to the electric field light of phase operator
Number receiving port；
The phase operator includes photoelectric switching circuit, and the photoelectric switching circuit connects magnetic field optical signal receiving port
The optical signal reduction that the optical signal and electric field optical signal receiving port of receipts are received is respectively high voltage magnetic field information and high voltage electric field
Information, then carries out Shape correction and is converted into square-wave signal, original voltage phase information and electricity is obtained by Zero-cross comparator method
Flow phase information.
The coil form sensor is the antenna that screw type circuit composition is scribed on the printed circuit board of one side Copper Foil；Institute
It is ambipolar, an extremely square copper coin, another extremely ground wire to state the structure of polar plate type sensor.
The slave computer includes acquisition module and CPU；
The acquisition module receives the voltage magnitude information and current magnitude information and phase that amplitude sensor group is sent
Voltage phase information and current phase information that sensor is sent, and A/D conversions, the acquisition module are carried out to the information of reception
CPU processing is given by obtained digital information transmission, the information after processing is sent to host computer by CPU again.
Host computer receives the digital information for coming from CPU and digital information is analyzed, and obtains quality of power supply information, so
Backward digital quantity processing system sends switch controlling signal, and host computer obtains the on off state that digital quantity processing system is sent simultaneously
Signal.
The digital quantity processing system is provided with off state control end and on off state feedback end；The on off state is anti-
Feedback end receives the switch controlling signal that sends of host computer, and by off state control end is sent to switch controlling signal described
The system switching of system primary equipment group, corresponding control operation is carried out to system switching；The on off state control end collection
The on off state of system switching, and be switch state signal, on off state by switch state by digital quantity processing system
The switch state signal being converted to is sent to host computer by feedback end.
Compared with prior art, the beneficial effects of the present invention are：
1. according to the measurement results of the quality of power supply, quickly various processing units are carried out with parameter and the switching of quantity is controlled,
The power level of power network can be ensured, the stability of a system is improved；
2. the technological means of the quality of power supply is accurately tested the invention provides dynamic realtime, convenient test, efficiency high, accurately
Less than 31 times each harmonics are measured, error is less than 0.2%；
3. can be with more efficient and timely understanding system Harmonic Conditions, and according to the result of measurement, quickly formed humorous
The methods that ripple is administered, send control instruction, by the switching of processing unit, allocate filtering, the dynamic reactive of access system
The parameter and number of the devices such as compensation, maintain the level of the quality of power supply, so that improve electric power system power network efficiency and power quality,
Reduce the loss that causes of harmonic wave, relative increase existing equipment power supply capacity reduces the dilatation investment of electric power system；
4. electrical equipment can be protected, extend the life-span；Ensure the normal operation of communication, the network equipment etc., environmental protection subtracts
Few harmonic pollution public electric wire net.
Brief description of the drawings
Fig. 1 is online monitoring method schematic device in the embodiment of the present invention；
Fig. 2 is phase detector group structural representation in the embodiment of the present invention；
Fig. 3 is coil form sensor schematic of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Such as Fig. 1, the present invention provides a kind of for reducing the online monitoring method device of direct-current commutation failure risk, and its feature exists
In：Described device includes system primary equipment group, amplitude sensor group, phase detector group, slave computer, host computer and digital quantity
Processing system；The system primary equipment group is unidirectionally connected with amplitude sensor group, and passes through electromagnetic field and phase detector group
Connection, the amplitude sensor and phase detector are unidirectionally connected with slave computer respectively, and the slave computer unidirectionally connects with host computer
Connect, the host computer and system primary equipment group are bi-directionally connected with digital quantity processing system respectively.
The system primary equipment group includes system switching and transformer group；The system switching includes breaker and contact
Device, the transformer group includes voltage transformer group summation current transformer group.
The amplitude sensor group includes active AC type voltage sensor and active ac type current sensor；It is described to have
The voltage magnitude information of source AC type voltage sensor collection voltages transformer group, and the voltage magnitude information transfer of collection is given
The slave computer；The active ac type current sensor gathers the current magnitude information of current transformer group, and by collection
Current magnitude information is transferred to the slave computer.
The high pressure magnetic of the high voltage electric field information summation current transformer group of the phase detector group collection voltages transformer group
Field information, and be square wave by the finish message of collection, obtained with Zero-cross comparator method after voltage phase information and current phase information,
Voltage phase information and current phase information are transferred to the slave computer.
Such as Fig. 2, the phase detector group includes coil form sensor, magnetic field signal processor, magnetic field signal optical fiber, pole
Template sensor, electric field signal processor, electric field signal optical fiber and phase operator.
The coil form sensor is placed on system primary equipment group nearby in the range of 10cm, and it is by current transformer group
High voltage magnetic field signal short range transmission gives the magnetic field signal processor, and the magnetic field signal processor enters high voltage magnetic field information
Row opto-electronic conversion obtains corresponding optical signal, magnetic field optical signal of the optical signals magnetic field signal Optical Fiber Transmission to phase operator
Receiving port；
The polar plate type sensor is placed on system primary equipment group nearby in the range of 20cm, and it is by voltage transformer group
High voltage electric field signal short range transmission gives the electric field signal processor, and the electric field signal processor enters high voltage electric field information
Corresponding optical signal is obtained after row opto-electronic conversion, the optical signals electric field signal Optical Fiber Transmission is believed to the electric field light of phase operator
Number receiving port；
The phase operator includes photoelectric switching circuit, and the photoelectric switching circuit connects magnetic field optical signal receiving port
The optical signal reduction that the optical signal and electric field optical signal receiving port of receipts are received is respectively high voltage magnetic field information and high voltage electric field
Information, then carries out Shape correction and is converted into square-wave signal, original voltage phase information and electricity is obtained by Zero-cross comparator method
Flow phase information.
Such as Fig. 3, the coil form sensor is that screw type circuit composition is scribed on the printed circuit board of one side Copper Foil
Antenna, coil helix number is 4 circles, and A and B are 2 ports that antenna is exported, and the size of printed circuit board is the pros of the 12cm length of sides
Shape；The structure of the polar plate type sensor is ambipolar, the square copper coin of extremely 12cm length of sides, another extremely ground wire.
The slave computer includes acquisition module and CPU；
The acquisition module receives the voltage magnitude information and current magnitude information and phase that amplitude sensor group is sent
Voltage phase information and current phase information that sensor is sent, and A/D conversions, the acquisition module are carried out to the information of reception
CPU processing is given by obtained digital information transmission, the information after processing is sent to host computer by CPU again.
Host computer receives the digital information for coming from CPU and digital information is analyzed, and obtains quality of power supply information, so
Backward digital quantity processing system sends switch controlling signal, and host computer obtains the on off state that digital quantity processing system is sent simultaneously
Signal.
The digital quantity processing system is provided with off state control end and on off state feedback end；The on off state is anti-
Feedback end receives the switch controlling signal that sends of host computer, and by off state control end is sent to switch controlling signal described
The system switching of system primary equipment group, corresponding control operation is carried out to system switching；The on off state control end collection
The on off state of system switching, and be switch state signal, on off state by switch state by digital quantity processing system
The switch state signal being converted to is sent to host computer by feedback end.The digital quantity processing system is routine PLC, such as western
Men Zi, Mitsubishi, Omron.
It is as follows provided by the present invention for the online monitoring method principle of device of reduction direct-current commutation failure risk：
The nonlinear characteristic of transformer group make it that the conversion character of each harmonic is differed, output signal and input signal
Waveform is distorted, and distortion degree is relevant with the frequency of primary signal, so as to accurately can not judge defeated according to output signal
Enter each harmonic of signal.Processing power system each harmonic calculating in, the ratio between amplitude of harmonic wave and fundamental wave and phase it
Certain relation than existing, the relation to amplitude and phase is entered Mobile state test and is fitted, and can mutually correct, with reference to measurement letter
Number amplitude and phase, the transmission characteristic of performance matching potential and current transformers analyzes the amplitude versus frequency characte of its each harmonic, from
And Accurate Analysis goes out former high pressure, each harmonic of high current signal.So as to obtain more accurate harmonic measure.
Using the Hall type sensor of high conversion rate, (i.e. active ac type voltage sensor and active ac type electric current are passed
Sensor), the size of dynamic process signal amplitude obtains the transmission function of transformer, and phase pair is obtained by phase detector group
Transmission function is corrected, and harmonic wave is handled using multi code Rate of Chinese character Digital Signal Processing.
The transmission characteristic principle that performance matching amplitude sensor group and phase detector group are combined is as follows：
The frequency spectrum of periodic signal is made up of amplitude spectrum and phase spectrum.The phase of each harmonic is related to overtone order.According to
The formula of inverse transformationBecause f (t) is necessary for real number, it is desirable to the e being made up of amplitude and phase+jωtReal number is obtained by integration (being summation during digital processing), the imaginary part of requirement result is small as far as possible during digital processing.This dress
Put makes result meet the requirement in the range of certain error by adjustment weights repeatedly, so as to reach accurate description transformer
The purpose of transmission function.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations, institute
The those of ordinary skill in category field with reference to above-described embodiment still can to the present invention embodiment modify or
Equivalent, these any modifications or equivalent without departing from spirit and scope of the invention are applying for this pending hair
Within bright claims.
Claims (8)
1. a kind of be used to reduce the online monitoring method device of direct-current commutation failure risk, it is characterised in that：Described device includes system
Primary equipment group, amplitude sensor group, phase detector group, slave computer, host computer and digital quantity processing system；The system one
Secondary device group is unidirectionally connected with amplitude sensor group, and is connected by electromagnetic field with phase detector group, the amplitude sensor
Group and phase detector group be unidirectionally connected with slave computer respectively, the slave computer is unidirectionally connected with host computer, the host computer and
System primary equipment group is bi-directionally connected with digital quantity processing system respectively；
The phase detector group includes coil form sensor, magnetic field signal processor, magnetic field signal optical fiber, polar plate type sensing
Device, electric field signal processor, electric field signal optical fiber and phase operator；
The coil form sensor is placed on system primary equipment group nearby in the range of 10cm, and it is by the high pressure of current transformer group
Magnetic field signal short range transmission gives the magnetic field signal processor, and high voltage magnetic field information is carried out light by the magnetic field signal processor
Electricity is converted to corresponding optical signal, and the optical signals magnetic field signal Optical Fiber Transmission is received to the magnetic field optical signal of phase operator
Port；
The polar plate type sensor is placed on system primary equipment group nearby in the range of 20cm, and it is by the high pressure of voltage transformer group
Electric field signal short range transmission gives the electric field signal processor, and high voltage electric field information is carried out light by the electric field signal processor
Corresponding optical signal is obtained after electricity conversion, the optical signals electric field signal Optical Fiber Transmission connects to the electric field optical signal of phase operator
Receiving end mouthful；
The phase operator includes photoelectric switching circuit, and the photoelectric switching circuit receives magnetic field optical signal receiving port
The optical signal that optical signal and electric field optical signal receiving port are received is reduced to high voltage magnetic field information and high voltage electric field information respectively,
Then Shape correction is carried out, square-wave signal is converted into, original voltage phase information and electric current phase are obtained by Zero-cross comparator method
Position information.
2. according to claim 1 be used to reduce the online monitoring method device of direct-current commutation failure risk, it is characterised in that：Institute
Stating system primary equipment group includes system switching and transformer group；The system switching includes breaker and contactor, described mutual
Sensor group includes voltage transformer group summation current transformer group.
3. according to claim 1 be used to reduce the online monitoring method device of direct-current commutation failure risk, it is characterised in that：Institute
Stating amplitude sensor group includes active AC type voltage sensor and active ac type current sensor；The active ac type electricity
The voltage magnitude information of pressure sensor collection voltages transformer group, and give the bottom by the voltage magnitude information transfer of collection
Machine；The active ac type current sensor gathers the current magnitude information of current transformer group, and by the current amplitude of collection
Information transfer gives the slave computer.
4. according to claim 1 be used to reduce the online monitoring method device of direct-current commutation failure risk, it is characterised in that：Institute
The high voltage magnetic field information of the high voltage electric field information summation current transformer group of phase detector group collection voltages transformer group is stated, and will
The finish message of collection is square wave, is obtained with Zero-cross comparator method after voltage phase information and current phase information, by voltage-phase
Information and current phase information are transferred to the slave computer.
5. according to claim 1 be used to reduce the online monitoring method device of direct-current commutation failure risk, it is characterised in that：Institute
It is the antenna that screw type circuit composition is scribed on the printed circuit board of one side Copper Foil to state coil form sensor；The polar plate type is passed
The structure of sensor is ambipolar, an extremely square copper coin, another extremely ground wire.
6. according to claim 1 be used to reduce the online monitoring method device of direct-current commutation failure risk, it is characterised in that：Institute
Stating slave computer includes acquisition module and CPU；
The acquisition module receives the voltage magnitude information and current magnitude information and phase sensing that amplitude sensor group is sent
Voltage phase information and current phase information that device is sent, and A/D conversions are carried out to the information of reception, the acquisition module is incited somebody to action
To digital information transmission give CPU processing, the information after processing is sent to host computer by CPU again.
7. according to claim 6 be used to reduce the online monitoring method device of direct-current commutation failure risk, it is characterised in that：Institute
State host computer to receive the digital information for coming from CPU and analyze digital information, quality of power supply information is obtained, then to number
Word amount processing system sends switch controlling signal, and host computer obtains the switch state signal that digital quantity processing system is sent simultaneously.
8. according to claim 7 be used to reduce the online monitoring method device of direct-current commutation failure risk, it is characterised in that：Institute
Digital quantity processing system is stated provided with off state control end and on off state feedback end；On the on off state feedback end is received
The switch controlling signal that sends of position machine, and switch controlling signal is sent to by the system by off state control end once set
The system switching of standby group, corresponding control operation is carried out to system switching；The on off state control end acquisition system switch
On off state, and be switch state signal by switch state by digital quantity processing system, on off state feedback end will turn
The switch state signal got in return is sent to host computer.
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| CN2838116Y (en) * | 2005-09-06 | 2006-11-15 | 田一兵 | Microcomputer protection, measurement, and control device |
| CN101571563A (en) * | 2009-06-04 | 2009-11-04 | 东方博沃（北京）科技有限公司 | Integrative electric energy quality monitoring terminal |
| CN102262179A (en) * | 2011-04-19 | 2011-11-30 | 重庆大学 | Unipolar current-voltage integration sensor |
| CN203368153U (en) * | 2013-08-08 | 2013-12-25 | 湖南工程学院 | Intelligent controller for low voltage circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102005742B (en) * | 2010-11-17 | 2014-03-12 | 中国电力科学研究院 | Distributed power generation island detection system and method based on power frequency carrier wave |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2838116Y (en) * | 2005-09-06 | 2006-11-15 | 田一兵 | Microcomputer protection, measurement, and control device |
| CN101571563A (en) * | 2009-06-04 | 2009-11-04 | 东方博沃（北京）科技有限公司 | Integrative electric energy quality monitoring terminal |
| CN102262179A (en) * | 2011-04-19 | 2011-11-30 | 重庆大学 | Unipolar current-voltage integration sensor |
| CN203368153U (en) * | 2013-08-08 | 2013-12-25 | 湖南工程学院 | Intelligent controller for low voltage circuit breaker |
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