CN102394554A - Power unit bypass circuit with redundancy control function - Google Patents
Power unit bypass circuit with redundancy control function Download PDFInfo
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- CN102394554A CN102394554A CN2011103098652A CN201110309865A CN102394554A CN 102394554 A CN102394554 A CN 102394554A CN 2011103098652 A CN2011103098652 A CN 2011103098652A CN 201110309865 A CN201110309865 A CN 201110309865A CN 102394554 A CN102394554 A CN 102394554A
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Abstract
The invention discloses a power unit bypass circuit with a redundancy control function. The power unit bypass circuit comprises a universal contactor and a bypass redundancy control circuit which are connected in parallel with single-phase inverter output ends U and V of a power unit, and is characterized in that the bypass redundancy control circuit comprises a unit control panel, a contactor coil control power supply conversion circuit and a contactor coil redundancy control circuit; the contactor coil redundancy control circuit comprises a contactor drive circuit and a contactor redundancy control circuit, the contactor drive circuit comprises a unit control panel, a bypass command issued by the unit control panel drives a relay, and a group of normally open contacts of the relay are connected in series to the interior of a contactor control coil loop; and the contactor redundancy control circuit is realized in the way that a second normally open auxiliary contact of a contactor and the group of normally open contacts of the relay, which are connected in series to the interior of the contactor control coil loop, are connected in parallel. The bypass control circuit provided by the invention ensures that bypass operation can be reliably conducted when the power unit falls into any failures at any time.
Description
Technical field
The present invention relates to high voltage transducer power unit Bypass Control field, in particular, relate to a kind of power unit by-pass circuit with redundancy control capability.
Background technology
Along with the power-saving technology extensive use of high voltage converter, the reliable and stable operation of high voltage converter is had higher requirement in occasions that counts for much such as electric power, metallurgy, oil, chemical industry.Independently the tandem type high voltage converter of power unit cascade is little with its harmonic wave, the unit can make things convenient for quick exchange, can produce in batches, advantage such as easy to maintenance by several; Receive the increasing favor of domestic and international every profession and trade, demonstrated wide promotion prospect.Therefore the stability and the reliability of unit cascade high voltage converter are had higher requirement.
Each of unit cascade high voltage converter is to be made up of some power unit cascades mutually, and the power device of using is numerous, thereby causes the fault point multiplication; And the load of high voltage converter is all very crucial aborning, as long as the device in one of them power cell breaks down and can not normally move, just causes high-pressure frequency-conversion apparatus output phase shortage; Can not normally move; Even the jumping machine, this has brought great hidden danger to production safety, also brings immeasurable economic loss to the user simultaneously.In order to improve the reliability of this topological structure high voltage converter; Adopt the power unit by-pass device; When one or more cell failure; With trouble unit excision, continue fully loaded or the derate operation quickly and effectively, the greatly very high reliability and the fail safe of high voltage converter by other normal power unit.
The reliability of power unit by-pass device control directly influences the performance of high-pressure frequency-conversion apparatus.The power unit by-pass mode mainly contains two kinds at present, and taking the bypass mode of diode and thyristor (like controllable silicon) formation and adopt contactor like Fig. 2, Fig. 3 like Fig. 1 is the bypass mode of by-pass switch.The thyristor bypass mode is simple in structure, volume is little, in light weight, but interference free performance is poor, misleads easily, reliability is low.Power cell contactor bypass mode has advantages such as tangible cut-off point, strong anti-interference performance, apolegamy installation aspect and more and more receives the favor of user and producer with it.
Existing contactor Bypass Control mode mainly contains two kinds; A kind of is to adopt Fig. 2 contactor coil centralized control; This control mode requires to increase in addition independent contactor control detection plate, requires to possess very high dielectric voltage withstand between contacts of contactor and the coil, and common contactor product commonly used can not satisfy its requirement on the market; Need carry out the particular design of secondary repacking or customization, cause cost height and reliability to can not get guaranteeing.Another kind is the distributed control of contactor coil of adopting Fig. 3, and the control of each contactor and detection are independently accomplished through each power cell, have effectively reduced cost like this.But the contactor of this mode control power supply is taken to inside modules, if when phase shortage or internal control plate power failure occurring in the running, the contactor shunting device can't guarantee to continue the bypass operation with out of hand, causes the frequency converter disorderly closedown.
Summary of the invention
The objective of the invention is to solve the problem that exists in the existing Bypass Control technology; A kind of power unit by-pass circuit with redundancy control capability is provided, and all reliably bypass operations of any fault can at any time take place in the guaranteed output unit in this Bypass Control circuit.
For realizing above-mentioned purpose; The present invention adopts following technical scheme; A kind of power unit by-pass circuit with redundancy control capability is provided; Comprise the universal contactor and the bypass redundancy control circuit that are connected in parallel on power cell single-phase inversion output U, V end, it is characterized in that said bypass redundancy control circuit comprises unit controls plate, contactor coil control power converting circuit and contactor coil redundancy control circuit; Said contactor coil redundancy control circuit comprises contactor drive circuit and contactor redundancy control circuit, and said contactor drive circuit comprises
The unitControl board,
The unitBypass command driven one relay that control board provides, one group of normally opened contact of said relay is connected in the contactor control coil loop; One group of normally opened contact of relay during said contactor redundancy control circuit is meant second of contactor often left auxiliary contact and be connected on contactor control coil loop is parallelly connected.
Aforesaid a kind of power unit by-pass circuit with redundancy control capability; It is characterized in that: said contactor coil redundancy control circuit also comprises bypass success feedback sense circuit, and said bypass success feedback sense circuit is meant that first of the contactor that is connected with the unit controls plate often drives auxiliary contact.
Aforesaid a kind of power unit by-pass circuit with redundancy control capability; It is characterized in that: said contactor coil control power converting circuit is single-phase insulate step-down transformer; Single-phase insulate step-down transformer input is connected with power cell input fuse former two; The secondary winding of said single-phase insulate step-down transformer is exported an end and directly is connected with the coil of contactor, and the other end is connected with the contactor coil control Driver Circuit.
Aforesaid a kind of power unit by-pass circuit with redundancy control capability; It is characterized in that: said contactor coil control power converting circuit is the AC/DC translation circuit; Said AC/DC translation circuit input is connected with power cell input fuse former two; The output cathode end of said AC/DC translation circuit directly links to each other with contactor coil is anodal, and negative pole end is connected with the contactor coil control Driver Circuit in addition.
The invention has the beneficial effects as follows: contactor coil control power supply is taken from the power cell input front end, and the contactor various aspects of performance is not had specific (special) requirements; When two phase fuse faults or bypass generation control power supply in service or bypass control loop device failure fault take place power cell, still can guarantee the reliable bypass of trouble unit, the high-pressure frequency-conversion apparatus moves continually and steadily.
Description of drawings
Fig. 1 is a power cell controllable silicon bypass circuit schematic diagram of the prior art;
Fig. 2 is a power cell contactor bypass circuit schematic diagram of the prior art;
Fig. 3 is an another kind of power cell contactor bypass circuit schematic diagram of the prior art;
Fig. 4 is the power cell contactor bypass redundancy control circuit schematic diagram of first embodiment of the invention;
Fig. 5 is the power cell contactor bypass redundancy control circuit schematic diagram of second embodiment of the invention;
Fig. 6 A is that first embodiment of the invention has normal bypass schematic diagram under the failure condition in the unit;
Fig. 6 B is a first embodiment of the invention at the bypass condition bypath principle figure that breaks down once more.
Embodiment
As shown in Figure 3; For distributing, existing contactor coil controls bypass mode; Bypass Control plate power supply fault or bypass control loop device (like relay K 1) take place in two phase fuse breakthrough phase faults, bypass running take place again to be damaged; Can not effectively continue to keep after bypass contactor akinesia or the action, cause the reliability of cascaded high-voltage frequency converter device to can not get guaranteeing.
As shown in Figure 4, be the first embodiment of the invention circuit theory diagrams, contactor bypass redundancy control circuit is made up of contactor, contactor coil control power converting circuit, coil redundancy control circuit.Comprise the universal contactor and the bypass redundancy control circuit that are connected in parallel on power cell single-phase inversion output U, V end, said bypass redundancy control circuit comprises unit controls plate, contactor coil control power converting circuit and contactor coil redundancy control circuit; Said contactor coil redundancy control circuit comprises contactor drive circuit and contactor redundancy control circuit, and said contactor drive circuit comprises
The unitControl board,
The unitBypass command driven one relay that control board provides, one group of normally opened contact of said relay is connected in the contactor control coil loop; One group of normally opened contact of relay during said contactor redundancy control circuit is meant second of contactor often left auxiliary contact and be connected on contactor control coil loop is parallelly connected.Said contactor coil redundancy control circuit also comprises bypass success feedback sense circuit, and said bypass success feedback sense circuit is meant that first of the contactor that is connected with the unit controls plate often drives auxiliary contact.Said contactor coil control power converting circuit is single-phase insulate step-down transformer; Single-phase insulate step-down transformer input is connected with power cell input fuse former two; The secondary winding of said single-phase insulate step-down transformer is exported an end and directly is connected with the coil of contactor, and the other end is connected with the contactor coil control Driver Circuit.
During the power cell operate as normal, because the power cell control board is not given bypass instruction, relay K 1 normally opened contact breaks off, and then contactor coil KM must not be electric, and the main contacts KM1 of contactor is in off-state, the shunting device open circuit.
Work as power cell like Fig. 6 A and break down (like driving malfunction, excess temperature fault etc.), the unit controls plate blocks the drive signal of single-phase H converter bridge switching parts device Q1～Q4 immediately it is turn-offed; Send out bypass instruction again and drive relay K 1 coil motion, relay K 1 normally opened contact converts into normally closed, and contactor coil gets electric, and its main contacts KM1 is closed, and power cell is exported U, V short circuit; Auxiliary normally opened contact KM11 is closed for contactor, feeds back to the unit controls plate and judges the bypass success; Auxiliary normally opened contact KM21 is closed for the contactor parallelly connected with relay K 1 normally opened contact, and the control power supply of contactor coil KM forms the loop through relay K 1 normally opened contact and the auxiliary normally opened contact KM21 of contactor simultaneously.
Like Fig. 6 A power cell success bypass; The cascaded high-voltage frequency converter device continues normal operation; The failure bypass unit is imported fuse two phase phase shortages or control power failure again; Unit controls plate dead electricity, invalid not controlled relay K 1 coil losing electricity that makes of bypass instruction, relay K 1 closed normally opened contact breaks off again; Shown in Fig. 6 B; This moment, power unit by-pass contactor KM coil constituted the electric loop of control by its redundant auxiliary contact KM21; Main contacts KM1, auxiliary contact KM11, the KM21 of contactor are kept closed; Be that high voltage converter can continue normal operation, improved the reliability and stability of cascaded high-voltage frequency converter greatly.
Fig. 5 is the second embodiment of the invention circuit theory diagrams.The difference of Fig. 5 second embodiment and Fig. 4 first embodiment is: single-phase insulate step-down transformer TM is replaced with single-phase AC/DC translation circuit.The operation principle of these two kinds of embodiment is identical, repeats no more here; Their main distinction is: what by-pass switch shown in Figure 4 adopted is A.C. contactor, and its control power supply is simple and reliable; And by-pass switch shown in Figure 5 is a coil DC control type contactor, and this mode contactor action is faster, more can get into the Redundant Control state fast by guaranteed output unit bypass device.
Above embodiment only is used to explain the present invention, does not limit protection scope of the present invention with this.The equivalent transformation that those skilled in the art do based on technical scheme of the present invention all belongs within the protection range of the present invention.
Claims (4)
1. power unit by-pass circuit with redundancy control capability; Comprise the universal contactor and the bypass redundancy control circuit that are connected in parallel on power cell single-phase inversion output U, V end; It is characterized in that said bypass redundancy control circuit comprises unit controls plate, contactor coil control power converting circuit and contactor coil redundancy control circuit; Said contactor coil redundancy control circuit comprises contactor drive circuit and contactor redundancy control circuit; Said contactor drive circuit comprises the unit controls plate; Bypass command driven one relay that the unit controls plate provides, one group of normally opened contact of said relay is connected in the contactor control coil loop; One group of normally opened contact of relay during said contactor redundancy control circuit is meant second of contactor often left auxiliary contact and be connected on contactor control coil loop is parallelly connected.
2. a kind of power unit by-pass circuit according to claim 1 with redundancy control capability; It is characterized in that: said contactor coil redundancy control circuit also comprises bypass success feedback sense circuit, and said bypass success feedback sense circuit is meant that first of the contactor that is connected with the unit controls plate often drives auxiliary contact.
3. a kind of power unit by-pass circuit according to claim 1 with redundancy control capability; It is characterized in that: said contactor coil control power converting circuit is single-phase insulate step-down transformer; Single-phase insulate step-down transformer input is connected with power cell input fuse former two; The secondary winding of said single-phase insulate step-down transformer is exported an end and directly is connected with the coil of contactor, and the other end is connected with the contactor coil control Driver Circuit.
4. a kind of power unit by-pass circuit according to claim 1 with redundancy control capability; It is characterized in that: said contactor coil control power converting circuit is the AC/DC translation circuit; Said AC/DC translation circuit input is connected with power cell input fuse former two; The output cathode end of said AC/DC translation circuit directly links to each other with contactor coil is anodal, and negative pole end is connected with the contactor coil control Driver Circuit in addition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103098652A CN102394554A (en) | 2011-10-13 | 2011-10-13 | Power unit bypass circuit with redundancy control function |
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| CN2011103098652A CN102394554A (en) | 2011-10-13 | 2011-10-13 | Power unit bypass circuit with redundancy control function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684468A (en) * | 2012-05-18 | 2012-09-19 | 卧龙电气集团股份有限公司 | Bypass cross control circuit and control method of high-voltage frequency conversion device |
| CN104333477A (en) * | 2014-11-26 | 2015-02-04 | 上海斐讯数据通信技术有限公司 | Bypass control method and bypass control system as well as network device |
| CN110137902A (en) * | 2019-06-14 | 2019-08-16 | 中国南方电网有限责任公司超高压输电公司天生桥局 | One kind prevents flexible direct current power module by-pass switch from refusing combined floodgate circuit and method |
| CN110323931A (en) * | 2019-08-15 | 2019-10-11 | 荣信汇科电气技术有限责任公司 | A kind of redundancy trigger circuit comprising state feedback function |
| CN110824351A (en) * | 2019-11-20 | 2020-02-21 | 天津津航计算技术研究所 | Relay redundancy fault detection circuit and detection method thereof |
| CN113381595A (en) * | 2020-02-25 | 2021-09-10 | 南京南瑞继保电气有限公司 | MMC sub-module and bypass protection method thereof |
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| US20090073622A1 (en) * | 2007-09-13 | 2009-03-19 | Siemens Energy & Automation, Inc. | Method and system for bypassing a power cell of a power supply |
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| CN101951134A (en) * | 2010-08-24 | 2011-01-19 | 艾默生网络能源有限公司 | Cascade topology frequency converter and bypass topology thereof |
| CN202268801U (en) * | 2011-10-13 | 2012-06-06 | 国电南京自动化股份有限公司 | Power unit bypass circuit with redundancy control function |
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2011
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Patent Citations (5)
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| CN1983784A (en) * | 2005-12-12 | 2007-06-20 | 上海艾帕电力电子有限公司 | Power unit and high-voltage frequency converter with contactor bypass function |
| US20090073622A1 (en) * | 2007-09-13 | 2009-03-19 | Siemens Energy & Automation, Inc. | Method and system for bypassing a power cell of a power supply |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684468A (en) * | 2012-05-18 | 2012-09-19 | 卧龙电气集团股份有限公司 | Bypass cross control circuit and control method of high-voltage frequency conversion device |
| CN102684468B (en) * | 2012-05-18 | 2014-10-15 | 卧龙电气集团股份有限公司 | Bypass cross control circuit and control method of high-voltage frequency conversion device |
| CN104333477A (en) * | 2014-11-26 | 2015-02-04 | 上海斐讯数据通信技术有限公司 | Bypass control method and bypass control system as well as network device |
| CN104333477B (en) * | 2014-11-26 | 2018-02-06 | 上海斐讯数据通信技术有限公司 | A kind of bypass control method, system and the network equipment |
| CN110137902A (en) * | 2019-06-14 | 2019-08-16 | 中国南方电网有限责任公司超高压输电公司天生桥局 | One kind prevents flexible direct current power module by-pass switch from refusing combined floodgate circuit and method |
| CN110323931A (en) * | 2019-08-15 | 2019-10-11 | 荣信汇科电气技术有限责任公司 | A kind of redundancy trigger circuit comprising state feedback function |
| CN110323931B (en) * | 2019-08-15 | 2024-05-10 | 荣信汇科电气股份有限公司 | Redundant trigger circuit containing state feedback function |
| CN110824351A (en) * | 2019-11-20 | 2020-02-21 | 天津津航计算技术研究所 | Relay redundancy fault detection circuit and detection method thereof |
| CN110824351B (en) * | 2019-11-20 | 2022-05-13 | 天津津航计算技术研究所 | Fault detection circuit and method for relay redundancy |
| CN113381595A (en) * | 2020-02-25 | 2021-09-10 | 南京南瑞继保电气有限公司 | MMC sub-module and bypass protection method thereof |
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Application publication date: 20120328 |