CN102355043A - Multiple variable-frequency power supply combined power device with redundancy design - Google Patents
Multiple variable-frequency power supply combined power device with redundancy design Download PDFInfo
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- CN102355043A CN102355043A CN2011103245115A CN201110324511A CN102355043A CN 102355043 A CN102355043 A CN 102355043A CN 2011103245115 A CN2011103245115 A CN 2011103245115A CN 201110324511 A CN201110324511 A CN 201110324511A CN 102355043 A CN102355043 A CN 102355043A
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Abstract
The invention relates to a multiple variable-frequency power supply combined power device with a redundancy design. The device comprises a main controller, a plurality of frequency converters, a voltage-current detector, a multi-winding reactor and a contactor or circuit breaker combination; the main controller is used for receiving an external control signal to provide a variable and controllable variable-frequency power supply on site, and synchronously performing power balance for the frequency converters and dynamic redistribution of the power after partial frequency converting devices are exited; the frequency converters are the main body devices for providing the variable-frequency power supply; the voltage-current detector is used for providing a feedback detection signal for frequency converting running power balance and automatically balancing the output power of the frequency converters in a small range; and the contactor or circuit breaker combination is mainly used for controlling entering or exiting of the frequency converters through controlling the switching on and switching off states of the frequency converters. The frequency converters are low-voltage, intermediate-voltage and high-voltage frequency converters, partial redundancy or full redundancy design can be made after configuring the system, so that the reliability of the variable-frequency power supply power system is improved and the application range of the variable-frequency is enlarged.
Description
Technical field
Patent of the present invention relates to the changeable frequency power associating of a kind of Redundancy Design electric supply installation.
Background technology
Development along with power electronic technology and microelectric technique; Converter technique reaches its maturity; In press, high-pressure frequency-conversion also obtained high speed development, uses in general blower fan, pump motor transformation and obtained development faster, middle and high pressure frequency conversion is the device of multidisciplinary multi-specialized, the microelectronics of collection, electronics, electric, high voltage one; There are the probability that breaks down in up to ten thousand of electronic component, power component and other matching components.
For the part important load of enterprises such as iron and steel, chemical industry, production of electronic components, its capacity is bigger, and energy waste is more serious, but there is certain risk in the application of conventional converter plant, mainly shows:
1, frequency conversion fault withdraws from, even of short duration fault may cause the interruption of production line, may cause greater loss.
2, recover after the of short duration fault of frequency converter, for some important process load, electric source disturbance may cause the variation of operating condition, and equipment itself is exerted an influence, and causes the running of other protection systems, makes load out of service, causes the interruption of production line.
Though the reliability of converter plant improves constantly, the idea that unexpected serious consequence influences the enterprise customer appears, and be badly in need of a solution and eliminate enterprise customer's misgivings, improve the reliability of variable electricity supply apparatus.
Summary of the invention
The present invention is directed to the problem of above-mentioned existence, adopted Redundancy Design, changeable frequency associating power supply technique, a kind of changeable frequency power associating of Redundancy Design electric supply installation of high reliability is provided, for the critical loads of important production line provides reliable variable frequency power supply.
The changeable frequency power associating of Redundancy Design of the present invention electric supply installation; Redundancy Design can be divided into part power redundancy or complete power redundancy, and its structure comprises that main controller, many frequency converters, electric current and voltages detect, many windings reactor and contactor or circuit breaker combination; Said main controller is used for receiving external control signal, coordinates many cover frequency converter cooperations, and for on-the-spot controlled variable frequency power supply is provided, and simultaneously frequency converter is carried out power-balance and the part converter plant withdraws from back power dynamic reallocation;
Said frequency converter is the agent set that variable frequency power supply is provided, and is used for receiving main controller frequency, voltage, electric current and synchronous given signal, the variable frequency power supply of output certain frequency, voltage, current value;
Said voltage, current detecting provide the detection feedback signal for the converting operation power-balance;
Said many windings reactor can be realized automatic current equalizing, among a small circle, realizes the autobalance of power converter output;
The combination of said contactor or circuit breaker through controlling its deciliter State Control frequency converter input or withdraw from, for the maintenance of fault frequency conversion provides safety guarantee.
The changeable frequency power associating of Redundancy Design of the present invention electric supply installation, said master controller is industrial computer, PC, PLC or single-chip microcomputer.
The changeable frequency power associating of Redundancy Design of the present invention electric supply installation, said frequency converter is low voltage frequency converter, medium voltage frequency converter or high voltage converter.
The changeable frequency power of Redundancy Design of the present invention associating electric supply installation, said cooperation is meant the power equalization of multi-frequency converter when system normally moves, and the dynamic power of part frequency conversion fault after withdrawing from back or trouble shooting and dropping into is balanced.
Beneficial effect compared with prior art of the present invention is: compare with present technical scheme; Patent of the present invention is passed through Redundancy Design; The cooperation scheme effectively reduces the probability of malfunction of device, can be the importance motor load or other power source loads provide variable frequency power supply; Through Redundancy Design the reliability of frequency-converting power supply is improved greatly, enlarge the Inverter Application scope.
Patent of the present invention is on the basis of improving the transducer body reliability, comes the cancellation element probability of malfunction with Redundancy Design, associating supply power mode, further improves the reliability of converter plant.Redundancy Design can be partial redundance or fully redundance, and when adopting fully redundance, two cover frequency converters can independently drag the load oepration at full load respectively; When the foregoing invention device fully just often, two the cover frequency converters all puts into operation, according to master controller, electric current and voltage feedback adjustment and the effect of many windings reactor automatic current equalizing; Two cover frequency converters are respectively with 50% load, and are when a frequency conversion fault, out of service automatically through contactor, circuit breaker combined fault system; Load is automatically transferred to normal frequency converter, and normal frequency converter band 100% load is in its load capacity scope; Keep the normal operation of production, after the fault frequency conversion recovers, put into operation through contactor or circuit breaker combination; Master controller carries out power-balance again and distributes, and makes two cover frequency converters respectively with 50% load.For the partial redundance system, distribute power according to frequency conversion failure condition balance.
If when adopting partial redundance, the separate unit frequency conversion system can not be with full machine utilization, when two or multi-platform combined operation, its total capacity is above rated load; With redundancy 50% is example, and during as if employing two cover frequency converter cooperations, the frequency conversion capacity is 75% of a load capacity, and total capacity is 150% of a rated capacity, and when a frequency conversion was out of service, the device load capacity can only reach 75% load capacity; If when adopting three cover frequency converter cooperations, the frequency conversion capacity is 50% of a load capacity, total capacity is 150% of a rated capacity, and when a frequency conversion was out of service, the device load capacity can only reach 100% load capacity.
Description of drawings
Fig. 1 is full redundancy two variable frequency power supplys associating electric supply installation of the present invention;
Fig. 2 is the changeable frequency power associating of partial redundance of the present invention electric supply installation.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
Embodiment 1
As shown in Figure 1, the changeable frequency power of Redundancy Design of the present invention associating electric supply installation, Redundancy Design is complete power redundancy, its structure comprises that main controller, many frequency converters, electric current and voltages detect, many windings reactor and contactor or circuit breaker combination; Main controller is used for receiving external control signal, coordinates many cover frequency converter cooperations, and for on-the-spot controlled variable frequency power supply is provided, and simultaneously frequency converter is carried out power-balance and the part converter plant withdraws from back power dynamic reallocation; Frequency converter is the agent set that variable frequency power supply is provided, and is used for receiving main controller frequency, voltage, electric current and synchronous given signal, the variable frequency power supply of output certain frequency, voltage, current value; Voltage, current detecting provide the detection feedback signal for the converting operation power-balance; Many windings reactor can be realized automatic current equalizing, among a small circle, realizes the autobalance of power converter output; The combination of contactor or circuit breaker through controlling its deciliter State Control frequency converter input or withdraw from, for the maintenance of fault frequency conversion provides safety guarantee.
Master controller is industrial computer, PC, PLC or single-chip microcomputer, and frequency converter is low voltage frequency converter, medium voltage frequency converter or high voltage converter.
Cooperation is meant the power equalization of multi-frequency converter when system normally moves, and part frequency conversion fault withdraws from the back or the dynamic power of trouble shooting after dropping into again is balanced.
Embodiment 2
Be that with embodiment 1 difference Redundancy Design is the part power redundancy.
Patent of the present invention is on the basis of improving the transducer body reliability, comes the cancellation element probability of malfunction with Redundancy Design, associating supply power mode, further improves the reliability of converter plant.Redundancy Design can be partial redundance or fully redundance, and when adopting fully redundance, two cover frequency converters can independently drag the load oepration at full load respectively; When the foregoing invention device fully just often, two the cover frequency converters all puts into operation, according to master controller, electric current and voltage feedback adjustment and the effect of many windings reactor automatic current equalizing; Two cover frequency converters are respectively with 50% load, and are when a frequency conversion fault, out of service automatically through contactor, circuit breaker combined fault system; Load is automatically transferred to normal frequency converter, and normal frequency converter band 100% load is in its load capacity scope; Keep the normal operation of production, after the fault frequency conversion recovers, put into operation through contactor or circuit breaker combination; Master controller carries out power-balance again and distributes, and makes two cover frequency converters respectively with 50% load.For the partial redundance system, distribute power according to frequency conversion failure condition balance.
If when adopting partial redundance, the separate unit frequency conversion system can not be with full machine utilization, when two or multi-platform combined operation, its total capacity is above rated load; With redundancy 50% is example, and during as if employing two cover frequency converter cooperations, the frequency conversion capacity is 75% of a load capacity, and total capacity is 150% of a rated capacity, and when a frequency conversion was out of service, the device load capacity can only reach 75% load capacity; If when adopting three cover frequency converter cooperations, the frequency conversion capacity is 50% of a load capacity, total capacity is 150% of a rated capacity, and when a frequency conversion was out of service, the device load capacity can only reach 100% load capacity.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and modification, these improve and modification also should be regarded as protection scope of the present invention.
Claims (4)
1. the changeable frequency power of Redundancy Design is united electric supply installation; It is characterized in that: Redundancy Design can be divided into part power redundancy or complete power redundancy, and its structure comprises that main controller, many frequency converters, electric current and voltages detect, many windings reactor and contactor or circuit breaker combination;
Said main controller is used for receiving external control signal, coordinates many cover frequency converter cooperations, and for on-the-spot controlled variable frequency power supply is provided, and simultaneously frequency converter is carried out power-balance and the part converter plant withdraws from back power dynamic reallocation;
Said frequency converter is the agent set that variable frequency power supply is provided, and is used for receiving main controller frequency, voltage, electric current and synchronous given signal, the variable frequency power supply of output certain frequency, voltage, current value;
Said voltage, current detecting provide the detection feedback signal for the converting operation power-balance;
Said many windings reactor can be realized automatic current equalizing, among a small circle, realizes the autobalance of power converter output;
The combination of said contactor or circuit breaker through controlling its deciliter State Control frequency converter input or withdraw from, for the maintenance of fault frequency conversion provides safety guarantee.
2. the changeable frequency power associating of Redundancy Design according to claim 1 electric supply installation, it is characterized in that: said master controller is industrial computer, PC, PLC or single-chip microcomputer.
3. the changeable frequency power associating of Redundancy Design according to claim 1 electric supply installation, it is characterized in that: said frequency converter is low voltage frequency converter, medium voltage frequency converter or high voltage converter.
4. the changeable frequency power associating of Redundancy Design according to claim 1 electric supply installation; It is characterized in that: said cooperation is meant the power equalization of multi-frequency converter when system normally moves, and part frequency conversion fault withdraws from the back or the dynamic power of trouble shooting after dropping into again is balanced.
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| CN2011103245115A CN102355043A (en) | 2011-10-24 | 2011-10-24 | Multiple variable-frequency power supply combined power device with redundancy design |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065318A (en) * | 2014-06-26 | 2014-09-24 | 中冶南方（武汉）自动化有限公司 | Frequency converter closed-loop vector redundancy control method during high-speed operation |
| CN104143921A (en) * | 2014-07-02 | 2014-11-12 | 核工业理化工程研究院 | Combined modular frequency converter and power supply system |
| CN105811417A (en) * | 2016-03-17 | 2016-07-27 | 金田集团（桐城）塑业有限公司 | Air knife fan AVR voltage-stabilizing apparatus applied to BOPP production line |
| CN107863817A (en) * | 2017-12-12 | 2018-03-30 | 郑州云海信息技术有限公司 | A kind of method of supplying power to and structure of new more bus redundancies |
| CN109599995A (en) * | 2018-12-28 | 2019-04-09 | 天津同羽嘉禾节能科技有限公司 | A kind of New-type asynchronous multi-source adjustable frequency motor |
| CN109818486A (en) * | 2017-11-20 | 2019-05-28 | 维谛技术有限公司 | The hot redundancy control method of frequency converter and redundancy frequency-converter device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065318A (en) * | 2014-06-26 | 2014-09-24 | 中冶南方（武汉）自动化有限公司 | Frequency converter closed-loop vector redundancy control method during high-speed operation |
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| CN105811417A (en) * | 2016-03-17 | 2016-07-27 | 金田集团（桐城）塑业有限公司 | Air knife fan AVR voltage-stabilizing apparatus applied to BOPP production line |
| CN109818486A (en) * | 2017-11-20 | 2019-05-28 | 维谛技术有限公司 | The hot redundancy control method of frequency converter and redundancy frequency-converter device |
| CN109818486B (en) * | 2017-11-20 | 2020-09-29 | 维谛技术有限公司 | Frequency converter thermal redundancy control method and redundancy frequency converter device |
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| CN109599995A (en) * | 2018-12-28 | 2019-04-09 | 天津同羽嘉禾节能科技有限公司 | A kind of New-type asynchronous multi-source adjustable frequency motor |
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Application publication date: 20120215 |