CN205212535U - Electric network source switched systems - Google Patents
Electric network source switched systems Download PDFInfo
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings 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
- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/12—Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
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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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/248—UPS systems or standby or emergency generators
Abstract
The utility model relates to an electric network source switched systems includes first power, second source, generating line, main control unit, a plurality of communication unit and a plurality of quick permanent magnetism switch element at least. Wherein, first power is supplied power to first generating line, and the second source is the stand -by power supply of first power. A second source replacement mains operated is controlled through controlling quick permanent magnetism switch element to the main control unit when first power breaks down. The communication unit is through low -voltage differential signal mode transmitting data between main control unit and quick permanent magnetism switch element. This electric network source switched systems can close a floodgate through quick permanent magnetism switch element again on the communication unit has reduced the basis of data transmission time fast, the separating brake operation, plans as a whole to optimize to each link of switching over the in -process, time of the whole switching process of reduction that can show, has improved switching speed.
Description
Technical field
The utility model relates to technical field of electric power automation, particularly relates to a kind of electric network source switched system.
Background technology
At industrial circles such as metallurgy, petrochemical industry, to the continuity of supply of electric power and reliability requirement very high.Once occur that supply of electric power is interrupted, very large loss can be caused to enterprise.Therefore in traditional electric network source switched system except normal working power, be also furnished with stand-by power supply in addition.When working power breaks down, in-put of spare power supply can be used.Now commercially have two class electric network source switched systems, a class is collectively referred to as automatic throw-in equipment of emergency power supply (hereinafter referred to as backup auto-activating device), and another kind of is stand-by power supply rapid switching control device (hereinafter referred to as fast switching device).
There are the following problems in actual use procedure for backup auto-activating device: one is because different field working conditions difference is very big, and the criterion that backup auto-activating device uses is " without stream " and " with no pressure ", fairly simple extensive, cannot be suitable for all occasions.If on inappropriate opportunity by in-put of spare power supply, jumbo motor cluster self-starting likely wears stand-by power supply down on the contrary, expands accident impact.Two is that the toggle speed of backup auto-activating device is slower.When backup auto-activating device detects that dead electricity starts, may be in arresting gear by most of motor, the requirement of enterprise's load power supply continuity cannot be ensured.
Fast switching device, relative to backup auto-activating device, on the basis studied the transient process of load power down, takes the switchover policy based on combined floodgate angle.These all make the switching effect of fast switching device be greatly improved relative to backup auto-activating device, and therefore fast switching device obtains a large amount of application in industrial enterprise.
But along with the change of load type and the on-the-spot raising required the quality of power supply, the switch speed of fast switching device backwardness comparatively speaking.Be the requirement that response national energy-saving reduces discharging, present industrial enterprise use the induction-motor load of band frequency converter in a large number simultaneously.This type load refers to, through the power supply of the output electric energy of frequency converter by power frequency supply pressure regulation after frequency modulation as motor.Frequency converter, between generators and loads, can regard a control appliance as, and also can regard a controlled equipment as, the transient characterisitics when abnormity of power supply and motor are completely different.Its switch speed to stand-by power supply requires higher, on the contrary to the not requirement of combined floodgate angle.The control strategy of combined floodgate angle that what therefore traditional fast switching device used grab can not play effect completely for the type load, and switch speed cannot reach the requirement becoming and make device frequently keep normal work, cause in the actual use procedure of a lot of electric field, although stand-by power supply has dropped into, frequency converter with load still all lose.Therefore, the switch speed how improving electric network source switched system is problem demanding prompt solution.
Utility model content
Based on this, for the problem of the switch speed of what raising electric network source switched system above-mentioned, the utility model provides a kind of electric network source switched system, can improve switch speed.
A kind of electric network source switched system, at least comprise the first power supply, second source and bus, wherein, described first power supply is to described bussed supply, and described second source is the stand-by power supply of described first power supply.Described electric network source switched system also at least comprises main control unit, some communication units and some rapid permanent-magnet switch elements; Described main control unit is connected with each described communication unit respectively; Described communication unit and rapid permanent-magnet switch element connect one to one respectively, and are connected to a described rapid permanent-magnet switch element between described first power supply and described bus, between described second source and described bus respectively;
Described main control unit, controls described first Power supply of described second source replacement when described first power failure by controlling described rapid permanent-magnet switch element; Described communication unit, by low-voltage differential signal mode transfer data between described main control unit and rapid permanent-magnet switch element;
Described rapid permanent-magnet switch element, disconnects the power supply circuits of described first power supply to described bus, and connects the power supply circuits of described second source to described bus when described first power failure.
Wherein in an embodiment, described communication unit comprises sending module and receiver module; Described sending module, sends the low-voltage differential signal after anti-interference process according to data to be sent to described receiver module, and described data to be sent are the data that described main control unit or rapid permanent-magnet switch element send; Described receiver module, exports described data to be sent according to the data that described sending module transmits.
Wherein in an embodiment, described receiver module comprises the receiving terminal network transformer, adaptive equalizer and the receiving terminal transducer that connect successively; Described receiving terminal network transformer, isolates the data that described sending module transmits, and exports the data after isolation to described adaptive equalizer; Described adaptive equalizer, carries out adaptive equalization process to the data after the process of described receiving terminal network transformer, and exports the data after adaptive equalization process process to described receiving terminal transducer; Described receiving terminal transducer, exports described data to be sent according to the data after described adaptive equalizer process.
Wherein in an embodiment, described sending module comprises the LVDS output interface, pre-emphasis driver and the transmitting terminal network transformer that connect successively; Described LVDS output interface, exports corresponding LVDS signal according to described data to be sent; Described pre-emphasis driver, carries out preemphasis driving to described LVDS signal, and the data after preemphasis being driven export described transmitting terminal network transformer to; Described transmitting terminal network transformer, carries out electrical isolation to the data of described pre-emphasis driver process, and the data after isolation are sent to described receiver module.
Wherein in an embodiment, described sending module also comprises the encoder be connected with described LVDS output interface, and described encoder carries out 8 bit/10 bits of encoded to described data to be sent, and the data after coding are sent to described LVDS output interface.
Wherein in an embodiment, by Double-strand transmission line data between described sending module and receiver module.
Wherein in an embodiment, described rapid permanent-magnet switch element comprises interconnective driver module and rapid permanent-magnet mechanism; Described driver module drives described rapid permanent-magnet mechanism to disconnect or conducting under described main control unit controls, and described driver module is also for being sent to described main control unit by the operating state of described rapid permanent-magnet mechanism by described communication unit.
Wherein in an embodiment, described rapid permanent-magnet mechanism is monostable rapid permanent-magnet mechanism.
Wherein in an embodiment, described main control unit comprises central processing system, communication board and man-machine interface system; Described central processing system is connected with described communication board, man-machine interface system respectively;
Described central processing system, plays core control action; Described communication board, with described communication unit communication; Described man-machine interface system, carries out for described central processing system and user alternately.
Wherein in an embodiment, described main control unit also comprises Function Extension plug-in system, and described Function Extension plug-in system is connected with described central processing system.
The beneficial effect that above-mentioned electric network source switched system has is: in this electric network source switched system, main control unit, controls second source replace the first Power supply when the first power failure by control rapid permanent-magnet switch element.Communication unit, by low-voltage differential signal mode transfer data between main control unit and rapid permanent-magnet switch element.Rapid permanent-magnet switch element, disconnects the power supply circuits of the first power supply to bus when the first power failure, and connects the power supply circuits of second source to bus.
Wherein, the low-voltage differential signal pattern that communication unit adopts is in point-to-point transmission process, can reach the speed of hundreds of million, the time that making to send the control commands such as divide-shut brake to rapid permanent-magnet switch element from main control unit, this process of fill order experiences altogether foreshortens to less than 1 millisecond from tens milliseconds.Within closing time can be foreshortened to 10ms by the 30ms of traditional switch by rapid permanent-magnet switch element simultaneously, reduce by the closing time of 70%, opening time is then contracted within 6ms.Therefore, carry out closing a floodgate by rapid permanent-magnet switch element again fast in this electric network source switched system decreases data transmission period basis at communication unit, sub-switching operation, pool optimization is carried out to the links in handoff procedure, the time of whole handoff procedure can be reduced significantly, improve switch speed.
Accompanying drawing explanation
Fig. 1 is the composition structural representation of the electric network source switched system of an embodiment.
Fig. 2 is by the internal structure schematic diagram of the main control unit in electric network source switched system embodiment illustrated in fig. 1.
Fig. 3 is the internal structure schematic diagram of the communication unit in electric network source switched system embodiment illustrated in fig. 1.
Fig. 4 is the internal structure schematic diagram of the rapid permanent-magnet switch element in electric network source switched system embodiment illustrated in fig. 1.
Embodiment
In order to the electric network source switched system that clearer explanation the utility model provides, explain below in conjunction with embodiment.Fig. 1 is the composition structural representation of the electric network source switched system of an embodiment.Fig. 2 is by the internal structure schematic diagram of the main control unit in electric network source switched system embodiment illustrated in fig. 1.Fig. 3 is the internal structure schematic diagram of the communication unit in electric network source switched system embodiment illustrated in fig. 1.Fig. 4 is the internal structure schematic diagram of the rapid permanent-magnet switch element in electric network source switched system embodiment illustrated in fig. 1.
In actual applications, for the induction-motor load of band frequency converter, the alternating current of input is become direct current by rectification circuit by frequency converter, is the capacitor charging on the DC bus of centre, then is alternating current through inverter circuit by the DC inverter in electric capacity.Therefore the electric capacity in frequency converter on DC bus has energy-storage function.And when input power source abnormality, because electric capacity self stores certain energy, therefore this electric capacity can be regarded as a DC power supply, thus can continue to keep exporting energy, this just makes frequency converter have the power supply enabling capabilities of short period.For preventing this electric capacity from burning when powering on, frequency converter generally can export when capacitance voltage drops to 70% in locking, and therefore only have the energy of 30% can be used for doing power supply in electric capacity and support, this just causes the power supply supporting time of frequency converter shorter.During on-the-spot actual use, the power supply supporting time of frequency converter is probably about 25ms, and frequency inverter capacity is larger, and the less supporting time of load is longer.
Therefore, to band frequency converter induction-motor load switch time, to switch influential effect maximum be switching time.Its threshold value is the power supply supporting time of frequency converter.If be greater than power supply supporting time switching time, frequency converter stops exporting, and affects continuous production.If be less than power supply supporting time switching time, frequency converter normally exports, and does not affect production.Therefore the switching of the induction-motor load of band frequency converter is required it is that The faster the better, shorten switching time as far as possible.And in the present embodiment, how object improves switch speed to solve exactly, thus shorten the switching time of whole power generating facilities and power grids switched system.To specifically introduce the scheme of the present embodiment below.
As shown in Figure 1, the electric network source switched system that the present embodiment provides at least comprises: the first power supply 100, second source 200, bus 300, main control unit 500, some communication units 600 and some rapid permanent-magnet switch elements 700.
Wherein, the first power supply 100 is powered to bus 300, and second source 200 is the stand-by power supply of the first power supply 100.Main control unit 500 is connected with each communication unit 600 respectively.Communication unit 600 and rapid permanent-magnet switch element 700 connect one to one respectively.A rapid permanent-magnet switch element 700 is connected to respectively between first power supply 100 and bus 300, between second source 200 and bus 300.
Main control unit 500, controls second source 200 when the first power supply 100 breaks down by control rapid permanent-magnet switch element 700 and replaces the first power supply 100 to power.In concrete implementation, whether the electric power thus supplied that main control unit 500 monitors the first power supply 100 is at any time normal.Break down if find, namely main control unit 500 starts switching, cuts off the power supply circuits that the first power supply 100 provides to bus 300, and second source 200 pairs of buses 300 are powered.
Main control unit 500 relates generally to two core technologies in above-mentioned fault treating procedure: start-up criterion and switching criterion.
Start-up criterion, is used for judging whether start switching.The concrete mode of start-up criterion is such as: 1, judging accident: start switching when the power fails.2, damage switches: start when bus loss of pressure or circuit breaker jump being detected and switch.
Switching criterion, refers to the control logic of in-put of spare power supply.The concrete mode of switching criterion is such as following several.
1, quick switching criterion: switch moment in startup, the angular difference of bus and stand-by power supply inlet wire, frequency difference, pressure reduction in limits, then drop into stand-by power supply immediately.
2, withstand voltage criterion: when load mostly is motor on bus, because motor generally can bear 1.1 ~ 1.2 times of rated voltages for a long time, therefore can drop into stand-by power supply within the scope of motor withstand voltage.
In the present embodiment, accelerated the operating rate of software by the hardware configuration improving main control unit 500, shorten main control unit 500 from detection power failure to the running time sending this process of relevant control instruction to communication unit 600 as far as possible.The hardware configuration specific implementation principle of main control unit 500 is as follows.
Concrete, main control unit 500 comprises central processing system 510, communication board 520 and man-machine interface system 530.Wherein, central processing system 510 is connected with communication board 520, man-machine interface system 530 respectively.
Central processing system 510, plays core control action.Such as, switch logic performs, analog quantity calculates, record the functions such as ripple, logout and liquid crystal display.Central processing system 510 by possessing the microcontroller (such as MPC8308) of high speed processing ability, the embedded system such as digital signal processor (such as OMAP-L138) and programmable gate array (such as EP4CGX50F23I7N) forms, after using power down, nonvolatile memory FLASH stores embedded software program, embedded software program runs in the DDR2 of Large Copacity, high speed, uses MicroSD card to carry out the file preserved in storage running process; Use PCIExpressGen1X1 bus communication between microcontroller and programmable gate array, ensure data reliable real-time transmission.
Communication board 520, is used for and communication unit 600 communication, and the control command such as combined floodgate, separating brake that is central processing system 510 sends is all be sent to communication unit 600 by communication board 520.
Man-machine interface system 530, carries out with user for central processing system 510 alternately.Specifically, man-machine interface system 530 adopts the EP4CE10 of altera corp, and by LVDS (Low-VoltageDifferentialSignaling, low-voltage differential signal) mode and central processing system 510 carry out communication, with complete keyboard, liquid crystal, LED display, record involve the work such as incident file storage administration.In addition, man-machine interface system 530 is also provided with FLASH, for storing the program of FPGA.
From above content, the whole hardware configuration of main control unit 500 all adopts high configuration, high performance structural composition, thus accelerate the speed of service of main control unit 500 in house software, shorten main control unit 500 from detection power failure to the running time sending this process of relevant control instruction to communication unit 600.
Be understandable that, the inside composition structure of main control unit 500 is not limited to above-mentioned a kind of situation, replace the first power supply 100 to power as long as can realize controlling second source 200 when the first power supply 100 breaks down by control rapid permanent-magnet switch element 700, and hardware configuration can accelerate the function of the operating rate of software.Such as, if when not needing with user interactions, then can without the need to arranging man-machine interface system 530.
In addition, main control unit 500 is also provided with Function Extension plug-in system 540.Function Extension plug-in system 540 is connected with central processing system 510.Function Extension plug-in system 540 can be followed according to actual conditions, uses, to enrich the serviceability of main control unit 500 as functions expanding plate.
Be understandable that, when main control unit 500 is without the need to carrying out functions expanding, then Function Extension plug-in system 540 can omit.
Communication unit 600, by low-voltage differential signal mode transfer data between main control unit 500 and rapid permanent-magnet switch element 700.Communication unit 600, between main control unit 500 and rapid permanent-magnet switch element 700, plays the effect of signal relaying.On the one hand, communication unit 600 receives the control command that main control unit 500 sends, and this control command is transferred to rapid permanent-magnet switch element 700.On the other hand, status signal that what communication unit 600 received that rapid permanent-magnet switch element 700 transmits show operating state (such as close a floodgate successfully, close a floodgate the signal such as unsuccessfully), then by this Signal transmissions to main control unit 500.Therefore, the speed that communication unit 600 transmits data directly affects the switch speed of whole electric network source switched system.
Traditional point-to-pointly directly adopt the mode of connection, not only there is wiring complexity, the defect that dumb, anti-interference is poor, but also need to carry out de-jitter, the time does not ensure.And in the present embodiment, in order to overcome above shortcoming, adopt the LVDS technology with high-speed driving ability to carry out transfer of data.The concrete structure of communication unit 600 is as follows.
Concrete, communication unit 600 comprises sending module 610, receiver module 620 and twisted-pair feeder 630.Sending module 610, sends the low-voltage differential signal after anti-interference process according to data to be sent to receiver module 620.Wherein data to be sent are the data that main control unit 500 or rapid permanent-magnet switch element 700 send.Receiver module 620, exports data to be sent according to the data that sending module 610 transmits.
Wherein, transmit data between sending module 610 and receiver module 620 by twisted-pair feeder 630, in the present embodiment, UTP-5 twisted-pair feeder selected by twisted-pair feeder 630.Be understandable that, between sending module 610 and receiver module 620, data can also be transmitted by the transmission medium that other antijamming capabilities are stronger, such as coaxial cable.
In the present embodiment, communication unit 600 is two-way communications, therefore in actual use, is equipped with sending module 610 and receiver module 620 in main control unit 500 one end and rapid permanent-magnet switch element 700 one end.The sending module 610 being simultaneously positioned at main control unit 500 one end is connected by twisted-pair feeder 630 with the receiver module 620 being positioned at rapid permanent-magnet switch element 700 one end.And the receiver module 620 being positioned at main control unit 500 one end is connected by twisted-pair feeder 630 with the sending module 610 being positioned at rapid permanent-magnet switch element 700 one end.
Concrete, sending module 610 comprises LVDS output interface 611, pre-emphasis driver 612, transmitting terminal network transformer 613 and encoder 614.Wherein, encoder 614, LVDS output interface 611, pre-emphasis driver 612 and transmitting terminal network transformer 613 connect successively.
Encoder 614, carries out 8 bit/10 bits of encoded to above-mentioned data to be sent, and the data after coding are sent to LVDS output interface 611.Wherein, 8 bit/10 bits of encoded, " 0 ", " 1 " quantity in data to be sent can be made to keep basically identical, continuous print " 1 " or " 0 " are no more than 5, namely one " 0 " or " 1 " must be inserted behind every 5 continuous print " 1 " or " 0 ", thus ensure signal DC balance, and improve the accuracy that the data recovery received is data to be sent by receiver module 620.
LVDS output interface 611, exports corresponding LVDS signal according to data to be sent.In the present embodiment, when being provided with encoder 614, the data that encoder 614 transmits are converted to LVDS signal by LVDS output interface 611.Wherein, LVDS output interface 611 utilizes low-down voltage swing (about 350mV) to be carried out the transmission of data by difference, i.e. low-voltage differential signal transmission.Adopt LVDS output interface 611, can make with the speed rates of hundreds of Mbit/s in signal pairs 630, simultaneously owing to adopting low pressure and low current type of drive, therefore, achieve the transmission performance of low noise, low-power consumption and two-forty.
Pre-emphasis driver 612, carries out preemphasis driving to the LVDS signal that above-mentioned LVDS output interface 611 exports, and the data (i.e. preemphasis LVDS signal) after preemphasis is driven process export transmitting terminal network transformer 613 to.In the present embodiment, pre-emphasis driver 612 refers to the LVDS drive circuit of band preemphasis function, provides electric current to realize the drive circuit of preemphasis or to utilize double-current source to provide electric current to realize the drive circuit of preemphasis as utilized resistance.Pre-emphasis driver 612 selects chip CLC001 in the present embodiment.
Due to when the LVDS signal after preemphasis driving process is after signal changes, maximum voltage can be risen to faster, and the instantaneous pressure exceeded well can suppress noise, pre-emphasis voltage is larger simultaneously, the distance of Signal transmissions will be longer, therefore, selects pre-emphasis driver 612 in the present embodiment, make the data transmitted have good antijamming capability, and LVDS signal can be driven in twisted-pair feeder 630 can to transmit longer distance.
Due in electric field, usually switch sections (rapid permanent-magnet switch element 700) is placed in a room, and main control unit 500 is placed in secondary chamber, therefore distance between the two may have hundreds of rice.And in the present embodiment, carry out preemphasis driving by pre-emphasis driver 612 pairs of LVDS signals, namely can meet the required distance of electric field to signal transmission.Adopt the LVDS technology of above-mentioned enhancement mode to also have two advantages, one is, compares, solve the problem of real-time and reliability contradiction with traditional divide-shut brake control cables with auxiliary contact cable mode, and the latter needs collection and the debounce anti-interference time of some ms; Two are, are conducive to realizing switchgear intellectuality by communication link, continuous Monitoring and Controlling loop and quick rapid permanent-magnet on off state when normal non-fault runs, and to avoid the problem of system tripping when dead electricity switches.
Transmitting terminal network transformer 613, carries out electrical isolation to the data that pre-emphasis driver 612 processes, and the data after isolation are sent to receiver module 620.Specifically, the electrical isolation function of transmitting terminal network transformer 613 is mainly: the coil coupling filtering of the LVDS signal differential mode coupling after being processed by pre-emphasis driver 612 is to strengthen the quality of signal, thus it is farther that Signal transmissions is obtained.Transmitting terminal network transformer 613 is coupled to twisted-pair feeder 630 by the conversion of electromagnetic field simultaneously, make like this there is no connection physically between twisted-pair feeder 630 and pre-emphasis driver 612 but still deliver signal, cut off the DC component in signal, improve the antijamming capability of sending module 610.In addition, even if the 0V level of twisted-pair feeder 630 terminal device is different, this transmitting terminal network transformer 613 still can ensure normal transmission signal in two equipment.
Therefore, sending module 610, by adopting above-mentioned each composition structure, can not only realize the high-speed transfer of data, also have stronger antijamming capability, and can transmit longer distance, meets the requirement of electric network source switched system to data transmission bauds and distance.
Be understandable that, the composition structure of sending module 610 is not limited to above-mentioned a kind of situation, as long as can realize the function sending the low-voltage differential signal after anti-interference process according to data to be sent to receiver module 620.Such as, when LVDS output interface 611, pre-emphasis driver 612 and transmitting terminal network transformer 613 can realize the above-mentioned functions of sending module 610, encoder 614 can have been omitted.
Concrete, receiver module 620 comprises receiving terminal network transformer 621, adaptive equalizer 622 and receiving terminal transducer 623.Wherein, receiving terminal network transformer 621, adaptive equalizer 622 and receiving terminal transducer 623 connect successively.
Receiving terminal network transformer 621, isolates the data that sending module 610 transmits, and exports the data after isolation to adaptive equalizer 622.Similar with transmitting terminal network transformer 613, receiving terminal network transformer 621 can improve the antijamming capability of receiver module 620 equally, and ensure still can normal transmission data when sending module 610 is different from the 0V level of receiver module 620.
Adaptive equalizer 622, the data after docking recipient network transformer 621 processes carry out adaptive equalization process, and export the data after adaptive equalization process to receiving terminal transducer 623.Can relaxation phenomenon be there is in the data sent due to sending module 610 after twisted-pair feeder 630 transmits, therefore the present embodiment is by arranging adaptive equalizer 622, self-adaptative adjustment balance parameters is carried out according to the change of channel, reduce signal disturbing by adjustment and compensating gain, and then improve the quality of the LVDS signal received.
Receiving terminal transducer 623, exports data to be sent according to the data after adaptive equalizer 622 processes.Wherein, receiving terminal transducer 623 can be specifically made up of deaccentuator and LVDS input interface circuit.At this moment the high fdrequency component in the LVDS signal after first being processed by adaptive equalizer 622 by deaccentuator is forced down, then by LVDS input interface circuit, this LVDS signal is converted to data to be sent.
Be understandable that, the composition structure of receiver module 620 is not limited to above-mentioned a kind of situation, as long as the data that can realize transmitting according to sending module 610 export the function of data to be sent, if such as sending module 610 is provided with encoder 614, then receiver module 620 also should arrange the decoder contrary with encoder 614 function.
In electric network source switched system, the branch wire time of circuit breaker determines the length of whole handoff procedure to a great extent, therefore in the present embodiment, select rapid permanent-magnet switch element 700 as circuit breaker, to shorten the branch wire time of circuit breaker, improve the switch speed of electric network source switched system further.
Rapid permanent-magnet switch element 700, disconnects the power supply circuits of the first power supply 100 to bus 300, and connects the power supply circuits of second source 200 to bus 300 when the first power supply 100 breaks down.In the present embodiment, rapid permanent-magnet switch element 700 refers to that closing time is between 5ms to 10ms, and opening time is between 4ms to 6ms.
Concrete, rapid permanent-magnet switch element 700 comprises driver module 710 and rapid permanent-magnet mechanism 720, and the two ends of driver module 710 are connected with communication unit 600, rapid permanent-magnet mechanism 720 respectively.Wherein, driver module 710 drives rapid permanent-magnet mechanism 720 to disconnect or conducting under main control unit 500 controls, and driver module 710 is also for being sent to main control unit 500 by the operating state of rapid permanent-magnet mechanism 720 by communication unit 600.
In the present embodiment, rapid permanent-magnet mechanism 720 selects and realizes by rapid permanent-magnet body the monostable rapid permanent-magnet mechanism that combined floodgate keeps, spring realizes separating brake maintenance, and the combined floodgate of rapid permanent-magnet mechanism 720, opening velocity The faster the better, just can shorten the switching time of whole electric network source switched system further.This rapid permanent-magnet mechanism 720 specific works principle is as follows.
When rapid permanent-magnet mechanism 720 is in closing position, in coil, no current passes through, and due to the effect of permanent magnet, dynamic iron core remains on upper end.And rapid permanent-magnet mechanism 720 by separating brake time, in operating coil, access the electric current of specific direction, this electric current produces and rightabout magnetic field, rapid permanent-magnet body magnetic field in dynamic iron core upper end, and the magnetic attraction that iron core is subject to reduces.And when the pulling force of making a concerted effort to be less than spring upwards that dynamic iron core is subject to, dynamic iron core moves downward, and rapid permanent-magnet mechanism 720 can be made to realize separating brake function.
When rapid permanent-magnet mechanism 720 is in open position, the electric current that access is contrary with during above-mentioned sub-switching operation in operating coil.This electric current produces the magnetic field identical with rapid permanent-magnet body magnetic direction on static iron core top.When this electric current increases to certain value, electromagnetism upwards makes a concerted effort to be greater than the counter-force of spring, and dynamic iron core moves upward, thus realizes closing a floodgate, and makes tripping spring energy storage.
Therefore, feature short for branch wire time to perform to ultimate attainment by rapid permanent-magnet mechanism 720, within closing time can being shortened to 9ms by the 30ms of conventional Medium voltage switch or circuit breaker, reduce by the closing time of 70%, opening time then narrows down to 6ms, meets the requirement that electric network source switched system carries out switching fast.Wherein, in order to realize the significantly minimizing of branch wire time, need to carry out omnibearing optimization to driver module 710 and coil.Mainly be optimized for big current.Because if reduce the on/off switch time, must improve the excitatory speed of coil, this just needs reduce inductance and increase electric current, and therefore reasonably coil turn and driving voltage are all vital.
In addition, for circuit breaker, the stability of switch directly affects the stable operation of electric network source switched system.And rapid permanent-magnet mechanism 720 has higher action stability, the dispersiveness of on/off switch time can control within 1ms, even lower, further increases the service behaviour of electric network source switched system.
For electric network source switched system, hardware composition structure has determined the time that whole handoff procedure spends to a great extent, and circuit breaker, the hardware composition configuration aspects of signal transmission system in whole power generating facilities and power grids switched system between main control unit and circuit breaker account for very large proportion.As long as therefore improve the hardware configuration of signal transmission system and circuit breaker, then more obviously can improve switch speed.
In the present embodiment, signal transmission system is communication unit 600, and circuit breaker is rapid permanent-magnet switch element 700.Wherein, the low-voltage differential signal pattern that communication unit 600 adopts is in point-to-point transmission process, the speed of hundreds of million can be reached, the time that this process of fill order experiences altogether from main control unit 500 sends control command to rapid permanent-magnet switch element 700 is foreshortened to less than 1 millisecond from tens milliseconds.Within closing time can be foreshortened to 10ms by the 30ms of traditional switch by rapid permanent-magnet switch element 700 simultaneously, reduce by the closing time of 70%, opening time is then contracted within 6ms.Therefore, carry out closing a floodgate by rapid permanent-magnet switch element 700 again fast in this electric network source switched system decreases data transmission period basis at communication unit 600, sub-switching operation, pool optimization is carried out to the links in handoff procedure, the time of whole handoff procedure can be reduced significantly, improve switch speed.
It should be noted that, the first power supply 100 in electric network source switched system, second source 200, bus 300, the quantity of communication unit 600 and rapid permanent-magnet switch element 700 is not limited to above-mentioned a kind of situation, some quantity can also be had, as long as can ensure that arbitrary bus 300 has power supply, arbitrary power supply has stand-by power supply, main control unit 500 is connected with all communication units 600, communication unit 600 and rapid permanent-magnet switch element 700 connect one to one respectively, rapid permanent-magnet switch element 700 is connected between bus 300 and power supply, and can be undertaken switching by rapid permanent-magnet switch element 700 between two power supplys of stand-by power supply each other.
Such as, for two power supply double-bus configuration systems, can arrange the first power supply to the first bussed supply, second source is to the second bussed supply.Main control unit is connected with each communication unit respectively.Communication unit and rapid permanent-magnet switch element connect one to one respectively.A rapid permanent-magnet switch element is connected to respectively between first power supply and the first bus, between second source and the second bus and between the first bus and the second bus.In addition, the first power supply and second source stand-by power supply each other.
So in this case, main control unit, controls stand-by power supply when the first power supply or second source break down by control rapid permanent-magnet switch element and replaces the first power supply or second source to power.Communication unit, by low-voltage differential signal mode transfer data between main control unit and rapid permanent-magnet switch element.
Rapid permanent-magnet switch element, disconnects the first power supply to the power supply circuits of the first bus and the circuit connected between the first bus and the second bus when the first power failure, afterwards second source namely by the second bus to the first bussed supply.Meanwhile, rapid permanent-magnet switch element, disconnects second source to the power supply circuits of the second bus and the circuit connected between the first bus and the second bus when second source breaks down, afterwards the first power supply namely by the first bus to the second bussed supply.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this specification is recorded.
Above embodiment only have expressed several execution mode of the present utility model, and it describes comparatively concrete, but therefore can not be interpreted as the restriction to utility model patent scope.Be to be noted that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (10)
1. an electric network source switched system, at least comprise the first power supply, second source and bus, wherein, described first power supply is to described bussed supply, and described second source is the stand-by power supply of described first power supply, it is characterized in that, also at least comprise main control unit, some communication units and some rapid permanent-magnet switch elements; Described main control unit is connected with each described communication unit respectively; Described communication unit and rapid permanent-magnet switch element connect one to one respectively, and are connected to a described rapid permanent-magnet switch element between described first power supply and described bus, between described second source and described bus respectively;
Described main control unit, controls described first Power supply of described second source replacement when described first power failure by controlling described rapid permanent-magnet switch element; Described communication unit, by low-voltage differential signal mode transfer data between described main control unit and rapid permanent-magnet switch element;
Described rapid permanent-magnet switch element, disconnects the power supply circuits of described first power supply to described bus, and connects the power supply circuits of described second source to described bus when described first power failure.
2. electric network source switched system according to claim 1, is characterized in that, described communication unit comprises sending module and receiver module; Described sending module, sends the low-voltage differential signal after anti-interference process according to data to be sent to described receiver module, and described data to be sent are the data that described main control unit or rapid permanent-magnet switch element send; Described receiver module, exports described data to be sent according to the data that described sending module transmits.
3. electric network source switched system according to claim 2, is characterized in that, described receiver module comprises the receiving terminal network transformer, adaptive equalizer and the receiving terminal transducer that connect successively; Described receiving terminal network transformer, isolates the data that described sending module transmits, and exports the data after isolation to described adaptive equalizer; Described adaptive equalizer, carries out adaptive equalization process to the data after the process of described receiving terminal network transformer, and exports the data after adaptive equalization process process to described receiving terminal transducer; Described receiving terminal transducer, exports described data to be sent according to the data after described adaptive equalizer process.
4. electric network source switched system according to claim 2, is characterized in that, described sending module comprises the LVDS output interface, pre-emphasis driver and the transmitting terminal network transformer that connect successively; Described LVDS output interface, exports corresponding LVDS signal according to described data to be sent; Described pre-emphasis driver, carries out preemphasis driving to described LVDS signal, and the data after preemphasis being driven export described transmitting terminal network transformer to; Described transmitting terminal network transformer, carries out electrical isolation to the data of described pre-emphasis driver process, and the data after isolation are sent to described receiver module.
5. electric network source switched system according to claim 4, it is characterized in that, described sending module also comprises the encoder be connected with described LVDS output interface, and described encoder carries out 8 bit/10 bits of encoded to described data to be sent, and the data after coding are sent to described LVDS output interface.
6. the electric network source switched system according to claim arbitrary in claim 2 to 5, is characterized in that, by Double-strand transmission line data between described sending module and receiver module.
7. the electric network source switched system according to claim arbitrary in claim 2 to 5, is characterized in that, described rapid permanent-magnet switch element comprises interconnective driver module and rapid permanent-magnet mechanism; Described driver module drives described rapid permanent-magnet mechanism to disconnect or conducting under described main control unit controls, and described driver module is also for being sent to described main control unit by the operating state of described rapid permanent-magnet mechanism by described communication unit.
8. electric network source switched system according to claim 7, is characterized in that, described rapid permanent-magnet mechanism is monostable rapid permanent-magnet mechanism.
9. the electric network source switched system according to claim arbitrary in claim 1 to 5, is characterized in that, described main control unit comprises central processing system, communication board and man-machine interface system; Described central processing system is connected with described communication board, man-machine interface system respectively;
Described central processing system, plays core control action; Described communication board, with described communication unit communication; Described man-machine interface system, carries out for described central processing system and user alternately.
10. electric network source switched system according to claim 9, is characterized in that, described main control unit also comprises Function Extension plug-in system, and described Function Extension plug-in system is connected with described central processing system.
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| CN105429284A (en) * | 2015-12-11 | 2016-03-23 | 深圳市国立智能电力科技有限公司 | Grid power supply switching system |
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| CN105429284A (en) * | 2015-12-11 | 2016-03-23 | 深圳市国立智能电力科技有限公司 | Grid power supply switching system |
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