CN105141123B - A kind of autonomous high-voltage frequency converter communicated using high-tension cable - Google Patents
A kind of autonomous high-voltage frequency converter communicated using high-tension cable Download PDFInfo
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- CN105141123B CN105141123B CN201510513189.9A CN201510513189A CN105141123B CN 105141123 B CN105141123 B CN 105141123B CN 201510513189 A CN201510513189 A CN 201510513189A CN 105141123 B CN105141123 B CN 105141123B
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Abstract
The invention discloses a kind of autonomous high-voltage frequency converters communicated using high-tension cable,Including several power cells being serially connected,Master control system,Power cell includes modulating wave receiving circuit,Pseudo noise code receives transmission circuit,PWM generative circuits,Unit control circuit,First magnet ring,Second magnet ring,First high-tension cable,Second high-tension cable,Modulating wave receiving circuit receives transmission circuit with pseudo noise code and connect,PWM generative circuits are connect with unit control circuit,Modulating wave receiving circuit receives transmission circuit with pseudo noise code and is connected respectively with PWM generative circuits,Modulating wave receiving circuit is connect with the first magnet ring,First high-tension cable is connect with the first magnet ring,Pseudo noise code receives transmission circuit and is connect with the second magnet ring,Second high-tension cable is connect with the second magnet ring,Master control system is connect with power cell,Above-mentioned autonomy high-voltage frequency converter,Communication failure rate is low,With extremely strong anti-interference and error correcting capability,Reliability is high,System complexity is low,It is cheap.
Description
Technical field
The present invention relates to high-voltage frequency converter more particularly to a kind of autonomous high-pressure frequency-conversions communicated using high-tension cable
Device.
Background technology
The high-voltage frequency converter being commercialized at present mostly uses the structure of unit cascade type, and each unit exports the voltage of 690V,
The frequency converter of the different voltages grades such as 3000V/6000V/10000V is realized in multiple-unit series connection.Because participating in concatenated element number
Numerous, the current potential of each unit is different from, and is got in touch with using fiber optic communication between control system and each unit so that control system
There is no the contacts of electricity between unit, it is ensured that all switch motions of IGBT of electrical security, each unit are required for controlling
System is controlled by the instruction that light is sent out, and state i.e. out of service and is bypassed after the alarm of the unit that breaks down.
By taking 10000V frequency converters as an example, three-phase 27 units in total need master control system to have 27 road serial communication interfaces, use 27 pairs
Light is realized.This results in following defects：
Control system is excessively complicated, because control system will control each action of tens units, needs to calculate
The PWM waveform of each unit, and instruction is assigned, the processor or FPGA for causing control system to need use high-grade, of high cost,
System complex, reliability are low, once control system generates mistake, consequence is very serious；
The autonomy of unit is poor, can not be timely responded to regard to being made the case where itself, can only rely on the instruction of control system, lead
Cause system is not strong enough；
Heavy dependence fiber optic communication, once communication failure, can only just carry out bypass protection, but the environment of industry spot all compares
Relatively severe, all than more serious, communication failure happens occasionally for dust, electromagnetic interference..
Invention content
In view of current high-voltage frequency converter above shortcomings, the present invention provides a kind of to be communicated using high-tension cable
Autonomous high-voltage frequency converter, communication failure rate is low, with extremely strong anti-interference and error correcting capability, and reliability is high, and system complexity is low,
It is cheap.
In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that：
A kind of autonomous frequency converter communicated using high-tension cable, the autonomy communicated using high-tension cable are high
Voltage frequency changer includes several power cells being serially connected, master control system, the power cell include modulating wave receiving circuit,
Pseudo noise code receive transmission circuit, PWM generative circuits, unit control circuit, the first magnet ring, the second magnet ring, the first high-tension cable,
Second high-tension cable, the modulating wave receiving circuit receive transmission circuit with pseudo noise code and connect, the PWM generative circuits and list
First control circuit connection, the modulating wave receiving circuit receive transmission circuit with pseudo noise code and are connected respectively with PWM generative circuits
It connects, the modulating wave receiving circuit is connect with the first magnet ring, and first high-tension cable is connect with the first magnet ring, the pseudorandom
Code reception transmission circuit connect with the second magnet ring, second high-tension cable is connect with the second magnet ring, the master control system and
Power cell connects.
According to one aspect of the present invention, the modulating wave receiving circuit includes mutual inductor 1n, resistance R7, with mutually amplification
Device, the in-phase amplifier include resistance R8, resistance R9, operational amplifier U4, resistance R10, the left end of the mutual inductor 1n with
The right end that the one end resistance R7, the resistance R8 connects the mutual inductor 1n, the resistance R8 other ends connection are bridged between right end
The in-phase end of the operational amplifier U4, one end of the resistance R9 connect the left end of the mutual inductor 1n, the resistance R9's
The other end connects the reverse side of the operational amplifier U4, and the resistance R10 is connected across the reverse side of the operational amplifier U4
Between output end.
According to one aspect of the present invention, it includes mutual inductor 2n, resistance R11, electricity that the pseudo noise code, which receives transmission circuit,
R12, amplifier U5, reshaper U6, switch KE are hindered, the resistance R11 is connect with resistance R12, the resistance R12 and one end and institute
The right end connection of mutual inductor 2n is stated, the left end of the mutual inductor 2n is connect with one end of the resistance R11, the resistance R12's
Other end and the other end of the resistance R11 connect, the input of the output end and reshaper U6 of the amplifier U5
End connection, the left end of the mutual inductor 2n are connect with the input terminal of amplifier U5, the one end the switch KE and resistance R11 and resistance
One end connection connected R12, the other end of the switch KE are connected with the other end of the resistance R12.
According to one aspect of the present invention, the master control system includes main control processor U1, radiating circuit, voltage and current
Converter, receiving circuit, the receiving circuit, radiating circuit are connected with main control processor respectively, the radiating circuit and electricity
Voltage-current converter connects, and the radiating circuit includes resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, operation amplifier
One end of device U2, the resistance R1 connect main control processor, and the other end of the resistance R1 is connected to the operational amplifier
The in-phase end of U2, one end of the resistance R2 are connected to the reverse side of the operational amplifier U2, and the resistance R4 is connected across institute
Between the reverse side and output end of stating operational amplifier U2, the output end of the operational amplifier U2 connects the one of the resistance R5
End, the other end of the resistance R5 is connected with one end of the resistance R3, described in the other end of the resistance R3 is connected to
The in-phase end of operational amplifier U2, the radiating circuit include constant-current source and H bridges, and the constant-current source connects with H bridgings, the H bridges
It is made of switching tube A, switching tube B, switching tube C and switching tube D, the upper end of the lower end of the switching tube A and the switching tube B connect
Pick up the left end for being used as bridge arm, the upper end of the lower end of the switching tube D and the switching tube C connect the right side as bridge arm
End, and the upper end of switching tube A and the upper end of switching tube D connect together and are connected to the output end of the constant-current source, switching tube B's
Lower end and the lower end of switching tube C connect together, and the left end of the H bridges is connected with the both ends of right end and the second high-tension cable, described
Receiving circuit includes that resistance R6 is connect with reshaper U3, the resistance R6 with constant-current source, and the resistance R6 is connect with reshaper U3,
The reshaper U3 is connect with main control processor U1.
The advantages of present invention is implemented：The PWM of each power cell of the present invention is voluntarily generated, the power of unit control circuit
The switch motion of device is also what oneself was controlled, and control system only needs to generate modulating wave, therefore control system can select
The low-cost processes device of high reliability is industrialized, complexity reduces, cheap, and reliability is promoted.Each power cell is certainly
It controls, therefore any failure can obtain timely processing, the voluntarily timing according to modulating wave and pseudo noise code generates accurate
PWM reduces the timing error that fiber optic communication delay is brought, can promote waveform quality, save optical fiber and required optical module,
Instead high-tension cable and cheap magnet ring, not only low cost, but also magnet ring is insensitive to external disturbance, does not receive dust stratification
Influence, communication failure rate is low, and the communication of pscudo-random codc modulation has extremely strong anti-interference and error correcting capability, and reliability increases
By force.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of structure chart of the autonomous high-voltage frequency converter communicated using high-tension cable of the present invention；
Fig. 2 is a kind of master control system of the autonomous high-voltage frequency converter communicated using high-tension cable of the present invention
Structural schematic diagram；
Fig. 3 is that a kind of modulating wave of autonomous high-voltage frequency converter communicated using high-tension cable of the present invention is received
The circuit diagram of circuit；
Fig. 4 is that a kind of pseudo noise code of the autonomous high-voltage frequency converter communicated using high-tension cable of the present invention is connect
Transmit and receive the circuit diagram of circuit.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of autonomous frequency converter communicated using high-tension cable, described to be led to using high-tension cable
The autonomous high-voltage frequency converter of letter includes several power cells being serially connected, master control system, and the power cell includes modulation
Wave receiving circuit, pseudo noise code receive transmission circuit, PWM generative circuits, unit control circuit, the first magnet ring, the second magnet ring, the
One high-tension cable, the second high-tension cable, the modulating wave receiving circuit receive transmission circuit with pseudo noise code and connect, the PWM
Generative circuit is connect with unit control circuit, the modulating wave receiving circuit and pseudo noise code receive transmission circuit respectively with PWM
Generative circuit is connected, and the modulating wave receiving circuit is connect with the first magnet ring, and first high-tension cable and the first magnet ring connect
It connects, the pseudo noise code receives transmission circuit and connect with the second magnet ring, and second high-tension cable is connect with the second magnet ring, described
Master control system is connect with power cell.
Each phase of frequency device is formed by several power unit cascades, each unit by modulating wave receiving circuit 31, it is pseudo- with
Machine code receives transmission circuit 41, PWM generative circuits 51 and power cell 61 and constitutes；Each phase participates in concatenated power cell and control
Information exchange is carried out using 2 groups of magnet rings and high-tension cable between system processed, wherein cable 1 passes through magnet ring 11,12 ... 1n, cable
It is upper to transmit the phase voltage modulating wave electric current I 1 generated in proportion, wherein secondary and each unit the 31 of 11,12 ... 1n magnet rings,
32 ... 3n are connected correspondingly so that each unit can receive modulating wave electric current；Cable 2 pass through magnet ring 21,
22 ... 2n transmit the broadcast message and polling message I2 of pscudo-random codc modulation on cable, wherein time of 21,22 ... 2n magnet rings
41,42 ... 4n of grade and each unit are connected correspondingly so that each unit has the opportunity to carry out with control system
High reliability communicates.The PWM generative circuits of power cell generate itself according to the timing information of modulating wave and pseudo noise code
PWM, and it is converted into the switch motion of control unit 61, power device on 62 ... 6n.When unit breaks down, power cell
Fault message is reported when voluntarily bypassing, and waiting for control system poll.
It is compared with traditional frequency converter fiber optic communication scheme, the action that optical fiber approach directly transmits the IGBT of each unit refers to
It enables, therefore any action is required for realizing and be calculated by master control, and is issued by optical fiber, and this programme only needs master control to calculate
Go out the output voltage waveforms of each phase, the action of IGBT is generated by each unit oneself, therefore Autonomous Model is stronger, product architecture letter
Single, reliability is high.
In the present embodiment, as described in Figure 3, the modulating wave receiving circuit includes mutual inductor 1n, resistance R7, with mutually amplification
Device, the in-phase amplifier include resistance R8, resistance R9, operational amplifier U4, resistance R10, the left end of the mutual inductor 1n with
The right end that the one end resistance R7, the resistance R8 connects the mutual inductor 1n, the resistance R8 other ends connection are bridged between right end
The in-phase end of the operational amplifier U4, one end of the resistance R9 connect the left end of the mutual inductor 1n, the resistance R9's
The other end connects the reverse side of the operational amplifier U4, and the resistance R10 is connected across the reverse side of the operational amplifier U4
Between output end.
The modulating wave receiving circuit of each power cell, because modulating wave is one-way transmission, therefore circuit is fairly simple, mutually
Sensor 1n comes out 1 scaling transformations of modulating wave electric current I, and pressure drop is generated on resistance R7, and R8, R9, R10 and U4 constitute same phase
Amplifier amplifies R7 both end voltages.
In the present embodiment, as shown in figure 4, the pseudo noise code receive transmission circuit include mutual inductor 2n, resistance R11,
Resistance R12, amplifier U5, reshaper U6, switch KE, the resistance R11 are connect with resistance R12, the resistance R12 and one end with
The right end of the mutual inductor 2n connects, and the left end of the mutual inductor 2n is connect with one end of the resistance R11, the resistance R12
Other end and the other end of the resistance R11 connect, the output end of the amplifier U5 is defeated with reshaper U6's
Enter end connection, the left end of the mutual inductor 2n is connect with the input terminal of amplifier U5, the one end the switch KE and resistance R11 and electricity
The connected one end connections of R12 are hindered, the other end of the switch KE is connected with the other end of the resistance R12.
The pseudo noise code of each power cell receive and uplink communication circuit in, mutual inductor 2n by pseudo noise code electric current I2 press than
Example conversion, generates pressure drop on R11, R12, wherein the pressure drop on R11 is amplified by U5, U6 shapings, you can obtain pseudorandom
The reduction waveform of code is used for unit control circuit therefrom demodulating information.The resistance value of R12 is much larger than R11, and can pass through KE
By its short circuit, therefore the load impedance of 2N has height two states, and when KE is closed, impedance is equal to R11, relatively low；Work as KE
When disconnection, impedance is equal to R11+R12, and impedance comparison is high, unit control circuit by the debugging of this impedance can to master control into
Row uplink communication, the polling message of response master control, and send the status information of itself.
In the present embodiment, as described in Figure 2, the master control system includes main control processor U1, radiating circuit, voltage electricity
Stream transformer, receiving circuit, the receiving circuit, radiating circuit are connected with main control processor respectively, the radiating circuit with
Voltage current adapter connects, and the radiating circuit includes that resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, operation are put
One end of big device U2, the resistance R1 connect main control processor, and the other end of the resistance R1 is connected to the operation amplifier
The in-phase end of device U2, one end of the resistance R2 are connected to the reverse side of the operational amplifier U2, and the resistance R4 is connected across
Between the reverse side and output end of the operational amplifier U2, the output end of the operational amplifier U2 connects the resistance R5's
One end, the other end of the resistance R5 are connected with one end of the resistance R3, and the other end of the resistance R3 is connected to institute
The in-phase end of operational amplifier U2 is stated, the radiating circuit includes constant-current source and H bridges, and the constant-current source connects with H bridgings, the H
Bridge is made of switching tube A, switching tube B, switching tube C and switching tube D, the upper end of the lower end of the switching tube A and the switching tube B
Connect the left end as bridge arm, the upper end of the lower end of the switching tube D and the switching tube C are connected as bridge arm
Right end, and the upper end of switching tube A and the upper end of switching tube D connect together and are connected to the output end of the constant-current source, switching tube B
Lower end and the lower end of switching tube C connect together, the left end of the H bridges is connected with the both ends of right end and the second high-tension cable, institute
It includes that resistance R6 is connect with reshaper U3, the resistance R6 with constant-current source to state receiving circuit, and the resistance R6 connects with reshaper U3
It connects, the reshaper U3 is connect with main control processor U1.
The advantages of present invention is implemented：The PWM of each power cell of the present invention is voluntarily generated, the power of unit control circuit
The switch motion of device is also what oneself was controlled, and control system only needs to generate modulating wave, therefore control system can select
The low-cost processes device of high reliability is industrialized, complexity reduces, cheap, and reliability is promoted.Each power cell is certainly
It controls, therefore any failure can obtain timely processing, the voluntarily timing according to modulating wave and pseudo noise code generates accurate
PWM reduces the timing error that fiber optic communication delay is brought, can promote waveform quality, save optical fiber and required optical module,
Instead high-tension cable and cheap magnet ring, not only low cost, but also magnet ring is insensitive to external disturbance, does not receive dust stratification
Influence, communication failure rate is low, and the communication of pscudo-random codc modulation has extremely strong anti-interference and error correcting capability, and reliability increases
By force.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those skilled in the art in technical scope disclosed by the invention, all answer by the change or replacement that can be readily occurred in
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be with the scope of the claims
It is accurate.
Claims (4)
1. a kind of autonomous high-voltage frequency converter communicated using high-tension cable, which is characterized in that it is described using high-tension cable into
The autonomous high-voltage frequency converter of row communication includes several power cells being serially connected, master control system, and the power cell includes
Modulating wave receiving circuit, pseudo noise code receive transmission circuit, PWM generative circuits, unit control circuit, the first magnet ring, the second magnetic
Ring, the first high-tension cable, the second high-tension cable, the modulating wave receiving circuit receive transmission circuit with pseudo noise code and connect, institute
It states PWM generative circuits to connect with unit control circuit, the modulating wave receiving circuit receives transmission circuit difference with pseudo noise code
It is connected with PWM generative circuits, the modulating wave receiving circuit is connect with the first magnet ring, first high-tension cable and the first magnetic
Ring connects, and the pseudo noise code receives transmission circuit and connect with the second magnet ring, and second high-tension cable is connect with the second magnet ring,
The master control system is connect with power cell.
2. the autonomous high-voltage frequency converter according to claim 1 communicated using high-tension cable, which is characterized in that described
Modulating wave receiving circuit includes mutual inductor 1n, resistance R7, in-phase amplifier, the in-phase amplifier include resistance R8, resistance R9,
Operational amplifier U4, resistance R10 bridge the one end resistance R7, the resistance R8 and connect between the left end and right end of the mutual inductor 1n
The right end of the mutual inductor 1n is connect, the resistance R8 other ends connect the in-phase end of the operational amplifier U4, the resistance R9
One end connect the left end of the mutual inductor 1n, the other end of the resistance R9 connects the reverse side of the operational amplifier U4,
The resistance R10 is connected across between the reverse side and output end of the operational amplifier U4.
3. the autonomous high-voltage frequency converter according to claim 2 communicated using high-tension cable, which is characterized in that described
It includes mutual inductor 2n, resistance R11, resistance R12, amplifier U5, reshaper U6, switch KE, institute that pseudo noise code, which receives transmission circuit,
It states resistance R11 to connect with resistance R12, one end of the resistance R12 is connect with the right end of the mutual inductor 2n, the mutual inductor
The left end of 2n is connect with one end of the resistance R11, the other end of the other end of the resistance R12 and the resistance R11
It connects, the output end of the amplifier U5 is connect with the input terminal of reshaper U6, the left end of the mutual inductor 2n and amplification
The input terminal of device U5 connects, and the one end the switch KE is connect with the one end being connected resistance R11 and resistance R12, the switch KE's
Other end is connected with the other end of the resistance R12.
4. the autonomous high-voltage frequency converter according to claim 3 communicated using high-tension cable, which is characterized in that described
Master control system includes main control processor U1, radiating circuit, voltage current adapter, receiving circuit, the receiving circuit, transmitting
Circuit is connected with main control processor respectively, and the radiating circuit is connect with voltage current adapter, and the radiating circuit includes
One end connection master control processing of resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, operational amplifier U2, the resistance R1
Device, the other end of the resistance R1 are connected to the in-phase end of the operational amplifier U2, and one end of the resistance R2 is connected to
The reverse side of the operational amplifier U2, the resistance R4 be connected across the operational amplifier U2 reverse side and output end it
Between, the output end of the operational amplifier U2 connects one end of the resistance R5, the other end of the resistance R5 and the electricity
The one end for hindering R3 is connected, and the other end of the resistance R3 is connected to the in-phase end of the operational amplifier U2, the transmitting electricity
Road includes constant-current source and H bridges, and the constant-current source connects with H bridgings, and the H bridges are by switching tube A, switching tube B, switching tube C and switch
The upper end of pipe D compositions, the lower end of the switching tube A and the switching tube B connect the left end as bridge arm, the switching tube
The lower end of D and the upper end of the switching tube C connect the right end as bridge arm, and the upper end of switching tube A and switching tube D's is upper
End connects together and is connected to the output end of the constant-current source, and the lower end of switching tube B and the lower end of switching tube C connect together, institute
The left end for stating H bridges is connected with the both ends of right end and the second high-tension cable, and the receiving circuit includes resistance R6 and reshaper U3, institute
It states resistance R6 to connect with constant-current source, the resistance R6 is connect with reshaper U3, and the reshaper U3 is connect with main control processor U1.
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| CN101030733A (en) * | 2007-03-21 | 2007-09-05 | 中国科学院电工研究所 | Multi-level power converter of light unit cascade |
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| CN201435301Y (en) * | 2009-03-31 | 2010-03-31 | 上海科大鲁能集成科技有限公司 | Clamping-type inductive coupler |
| CN103675772A (en) * | 2013-11-26 | 2014-03-26 | 北京宇航系统工程研究所 | Multifunctional SAR complex electromagnetic environment simulator |
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| US20070198494A1 (en) * | 2005-07-08 | 2007-08-23 | Vadon Mark C | Apparatus and method for facilitating a search for sets of gems |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101030733A (en) * | 2007-03-21 | 2007-09-05 | 中国科学院电工研究所 | Multi-level power converter of light unit cascade |
| CN101232254A (en) * | 2008-02-27 | 2008-07-30 | 中国农业大学 | Power transformer |
| CN101257247A (en) * | 2008-04-16 | 2008-09-03 | 哈尔滨同为电气股份有限公司 | Current source coupled type high voltage thyristor valve group triggering unit |
| CN201435301Y (en) * | 2009-03-31 | 2010-03-31 | 上海科大鲁能集成科技有限公司 | Clamping-type inductive coupler |
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