CN1937346A - Power-supply rectifying system at direct current side with protection device - Google Patents
Power-supply rectifying system at direct current side with protection device Download PDFInfo
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- CN1937346A CN1937346A CN 200610047728 CN200610047728A CN1937346A CN 1937346 A CN1937346 A CN 1937346A CN 200610047728 CN200610047728 CN 200610047728 CN 200610047728 A CN200610047728 A CN 200610047728A CN 1937346 A CN1937346 A CN 1937346A
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- direct current
- power
- isolation switch
- rectifying system
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Abstract
In particular, the disclosed power supply rectification system is aimed at DC bus without quick breaking switch of multiple or single rectification system. When producing inner short circuit fault, the disclosed rectifier can cut off and insulate DC power supply rectification system at fault point quickly. Being setup in front of DC disconnecting switch from DC output of each rectifier unit, a DC non-contact disconnecting switch device possesses reverse blockout function, and can be shutoff at same time following ac circuit breaker in high voltage. The invention solves issues that load at DC side cannot be cut off in time, and fault continues deterioration caused by counter-electromotive force of Dc load for former DC power supply system, where there is no quick breaking switch at DC side. The invention raises operation reliability of rectification system greatly.
Description
Affiliated technical field
The present invention relates to a kind of heavy DC power-supply rectifying system; particularly relate on a kind of dc bus and do not have quick section breaker at many or separate unit commutation system; when rectifier produces internal short circuit fault, can cut off power-supply rectifying system rapidly with the DC side band protective device of isolated fault point.
Background technology
Heavy DC power load voltage is no more than 1800V DC usually, direct current but reaches tens even the hundreds of kilo-ampere, for the commutation system of its power supply often many rectifying installations compose in parallel a DC power-supply system, for example: a 300kA, it is its power supply that the Aluminum Electrolysis Production system of 1300V just needs 5～6 rectifying installation parallel connections, for realize when rectifying device inside is short-circuited fault can the fast shut-off power supply, the reverse current checkout gear is set on the direct current branch bus during rectifying device design, electric current flows into to short dot when being short-circuited, flowing through, the local current direction changes on the system busbar, the circuit breaker that reverse current checkout gear action output trip signal acts on the Rectification Power Factor AC side of all parallel runnings cuts off the AC side power supply, but there is following defective in this method, at first, must be simultaneously when a Rectification Power Factor DC side is short-circuited fault all Rectification Power Factor of parallel running be all had a power failure, in addition, because DC side does not have quick section breaker, can not in time cut off the DC side load, often because the back-emf effect of DC load makes fault continue to worsen.
The content of invention
Technical problem to be solved by this invention provides a kind of power-supply rectifying system of DC side band protective device; purpose is when can cut off this unit AC side circuit breaker when a Rectification Power Factor is short-circuited fault; fast shut-off DC load side bus is to realize thorough isolated fault point; reduce the probability that causes large-area power-cuts owing to a Rectification Power Factor local fault; prevent that fault coverage from enlarging, and improves the power supply reliability of whole DC supply commutation system.
In order to solve the problems of the technologies described above; the present invention is achieved in that the power-supply rectifying system of DC side band protective device, and the front end of exporting the DC-isolation switch at each Rectification Power Factor direct current is provided with the contactless isolation switch device of direct current that can close and have the reverse blocking function with high-voltage AC breaker simultaneously.
The output of the contactless isolation switch device of described direct current links to each other with the assist control case with the DC-isolation switch, and the assist control case is connected with the Microcomputer Protection unit, and the Microcomputer Protection unit is connected with the input of high-voltage AC breaker.
The contactless isolation switch device of described direct current be by the thyristor element, the thyristor element trigger equipment that is used to control the action of thyristor element constitutes.
At least two of described thyristor elements, the thyristor interelement is connected in parallel.
The contactless isolation switch device of described direct current can be replaced by dc circuit breaker.
Advantage of the present invention and effect are as follows:
The present invention has increased by one to original commutation system to have the quick break-up device of contactless thyristor that can close and have the reverse blocking function with high-voltage AC breaker simultaneously, it is the contactless isolation switch device of direct current, it has solved original DC power-supply system because DC side does not have quick section breaker, can not in time cut off the DC side load, because the back-emf effect of DC load continues to make the problem of fault deterioration.Reduce the probability that causes large-area power-cuts owing to a Rectification Power Factor local fault, prevent that fault coverage from enlarging, and improves the power supply reliability of whole DC supply commutation system.Improved the operational reliability of commutation system greatly.
Description of drawings
Fig. 1 is the structural representation of the power-supply rectifying system of DC side band protective device of the present invention.
Fig. 2 is embodiment one structural representation of the contactless isolation switch device of direct current among Fig. 1.
Wherein: 1, high-voltage alternating bus; 2, high-voltage AC breaker, 3, voltage regulating rectifier transformer, 4, rectifying device; 5, direct current branch bus; 6, the contactless isolation switch device of direct current, 7, the DC-isolation switch, 8, the direct current positive bus-bar that confluxes; 9, the direct current negative busbar of confluxing; 10, Microcomputer Protection unit, 11, the assist control case, 12, the thyristor element.
Embodiment
Below inventive embodiment is described in detail in conjunction with the accompanying drawings, but protection scope of the present invention is not limit by embodiment.
Embodiment one:
The Aluminum Electrolysis Production process is a continuous process; this just requires to provide for the Aluminum Electrolysis Production line commutation system reliability service of power supply; Fig. 1 is the power-supply rectifying system structural representation of DC side band protective device; DC supply commutation system is made of a plurality of Rectification Power Factor parallel connections; for guaranteeing the fail safe and the reliability of direct current supply; when certain Rectification Power Factor breaks down, must quick isolated fault unit.Existing DC supply commutation system is to be made of high-voltage alternating bus 1, high-voltage AC breaker 2, voltage regulating rectifier transformer 3, rectifying device 4, direct current branch bus 5, DC-isolation switch 7, direct current the conflux negative busbar 9, Microcomputer Protection unit 10, assist control case 11 of positive bus-bar 8, direct current of confluxing.The power-supply rectifying system of DC side band protective device of the present invention is that the front end at each Rectification Power Factor direct current output DC-isolation switch 7 is provided with the contactless isolation switch device 6 of direct current that can close and have the reverse blocking function with high-voltage AC breaker simultaneously.The output of direct current is contactless isolation switch device 6 is connected with assist control case 11 with DC-isolation switch 7, and assist control case 11 is connected with Microcomputer Protection unit 10, and Microcomputer Protection unit 10 is connected with the input of high-voltage AC breaker 2.Each high-voltage AC breaker 2 is connected with high-voltage alternating bus 1.
Above-mentioned direct current is contactless, and isolation switch device 6 is to be made of thyristor element 12, as shown in Figure 2, it can be a thyristor element 12, also can be to be made of two above thyristor elements 12, when adopting two above thyristor elements 12,12 of thyristor elements are for being connected in parallel.The concrete structure of direct current is contactless isolation switch device 6 is: thyristor element 12 (quantity of this thyristor element should rationally be determined according to the size of direct current); Be used to control the thyristor element trigger equipment of thyristor element action; The chilled water unit that is used for the cooling of thyristor element, this device can overlap with silicon rectifier cubicle shared, also can be provided with separately.The present invention utilizes the reverse blocking voltage and the controlled quick conducting turn-off characteristic of thyristor element 12; select a plurality of thyristor element 12 parallel connections according to the size of current of practical application; the power supply of the thyristor element trigger equipment of direct current is contactless isolation switch device 6 adopts the AC synchronous power supply to reach and high-voltage AC breaker 2 synchronization actions; when the device fails between high-voltage AC breaker 2 and the contactless isolation switch device 6 of direct current; the 10 pairs of high-voltage AC breakers 2 in Microcomputer Protection unit send trip signal; Microcomputer Protection unit 10 sends by the contactless isolation switch device 6 of 11 pairs of direct currents of assist control case and closes and the reverse blocking signal simultaneously; utilize the characteristic of the unidirectional conducting reverse blocking of thyristor element 12 to isolate the electric current of other non-fault unit and electric current that the dc load back-emf produces flows into to the fault point, thereby reach the purpose of quick and complete isolation unit.
Embodiment two:
Direct current described in the embodiment one is contactless, and isolation switch device 6 also can adopt that dc circuit breaker replaces, and plays the purpose that electric current that the electric current of isolating other non-fault unit and dc load back-emf produce flows into to the fault point, and other structure is with embodiment one.
Claims (5)
1, the power-supply rectifying system of DC side band protective device is characterized in that at the front end of each Rectification Power Factor direct current output DC-isolation switch (7) the contactless isolation switch device of direct current (6) that can close and have the reverse blocking function with high-voltage AC breaker (2) simultaneously being set.
2, the power-supply rectifying system of DC side band protective device according to claim 1; the output that it is characterized in that the contactless isolation switch device of described direct current (6) is connected with assist control case (11) with DC-isolation switch (7); assist control case (11) is connected with Microcomputer Protection unit (10), and Microcomputer Protection unit (10) are connected with the input of high-voltage AC breaker (2).
3, the power-supply rectifying system of DC side band protective device according to claim 1 and 2, it is characterized in that the contactless isolation switch device of described direct current (6) be by thyristor element (12), the thyristor element trigger equipment that is used to control the action of thyristor element constitutes.
4, the power-supply rectifying system of DC side band protective device according to claim 3 is characterized in that (12) at least two of described thyristor elements, and the thyristor element is connected in parallel between (12).
5, the power-supply rectifying system of DC side band protective device according to claim 1 and 2 is characterized in that the contactless isolation switch device of described direct current (6) can be replaced by dc circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100477285A CN100461574C (en) | 2006-09-13 | 2006-09-13 | Power-supply rectifying system at direct current side with protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100477285A CN100461574C (en) | 2006-09-13 | 2006-09-13 | Power-supply rectifying system at direct current side with protection device |
Publications (2)
| Publication Number | Publication Date |
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| CN1937346A true CN1937346A (en) | 2007-03-28 |
| CN100461574C CN100461574C (en) | 2009-02-11 |
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| CNB2006100477285A Active CN100461574C (en) | 2006-09-13 | 2006-09-13 | Power-supply rectifying system at direct current side with protection device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267405A (en) * | 2011-05-09 | 2011-12-07 | 株洲变流技术国家工程研究中心有限公司 | Energy feeding type dragging power supply device and control method thereof |
| CN103107519A (en) * | 2011-11-14 | 2013-05-15 | 沈阳铝镁设计研究院有限公司 | Relay protection device of large-scale rectifier unit |
| CN103178523A (en) * | 2013-04-16 | 2013-06-26 | 四川英杰电气股份有限公司 | Large-current power supply loop |
| CN103323689A (en) * | 2012-03-22 | 2013-09-25 | 贵阳铝镁设计研究院有限公司 | Rectification efficiency test device for rectification station in electrolysis series |
| CN103579988A (en) * | 2012-08-02 | 2014-02-12 | 施耐德电器工业公司 | System for protecting a plurality of electrical outlets against short circuits, and electrical facility comprising such a protective system |
| CN104078970A (en) * | 2013-03-29 | 2014-10-01 | 沈阳铝镁设计研究院有限公司 | Direct-current side networking operation networking method for double-power-source rectification system |
| CN105322506A (en) * | 2014-06-26 | 2016-02-10 | 沈阳铝镁设计研究院有限公司 | Reverse current protection rectifier unit |
| CN108352703A (en) * | 2015-08-27 | 2018-07-31 | 代尔夫特理工大学 | DC switch yards and the method for operating the DC switch yards |
| CN109959129A (en) * | 2017-12-14 | 2019-07-02 | 株洲中车时代电气股份有限公司 | A kind of integral frequency conversion controller for screw machine central air-conditioning |
Family Cites Families (4)
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| CN2059028U (en) * | 1989-06-01 | 1990-07-04 | 陈琳 | Protector for tv set |
| CN2304213Y (en) * | 1997-04-18 | 1999-01-13 | 贾连巨 | Safety protective switch for electric-heating blanket |
| US7283377B2 (en) * | 2003-09-05 | 2007-10-16 | Rockwell Automation Technologies, Inc. | Method for controlling firing angle under line dip situations |
| CN100413171C (en) * | 2005-12-08 | 2008-08-20 | Tcl低压电器(无锡)有限公司 | Regioselectivity interlocking apparatus |
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2006
- 2006-09-13 CN CNB2006100477285A patent/CN100461574C/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102267405B (en) * | 2011-05-09 | 2013-11-06 | 株洲变流技术国家工程研究中心有限公司 | Energy feeding type dragging power supply device and control method thereof |
| CN102267405A (en) * | 2011-05-09 | 2011-12-07 | 株洲变流技术国家工程研究中心有限公司 | Energy feeding type dragging power supply device and control method thereof |
| CN103107519B (en) * | 2011-11-14 | 2016-06-22 | 沈阳铝镁设计研究院有限公司 | A kind of protective relaying device of large-scale Rectification Power Factor |
| CN103107519A (en) * | 2011-11-14 | 2013-05-15 | 沈阳铝镁设计研究院有限公司 | Relay protection device of large-scale rectifier unit |
| CN103323689A (en) * | 2012-03-22 | 2013-09-25 | 贵阳铝镁设计研究院有限公司 | Rectification efficiency test device for rectification station in electrolysis series |
| CN103579988B (en) * | 2012-08-02 | 2018-06-05 | 施耐德电器工业公司 | Prevent multiple electrical equipments for electrically activating a short-circuit protection system and the system containing protection |
| CN103579988A (en) * | 2012-08-02 | 2014-02-12 | 施耐德电器工业公司 | System for protecting a plurality of electrical outlets against short circuits, and electrical facility comprising such a protective system |
| CN104078970A (en) * | 2013-03-29 | 2014-10-01 | 沈阳铝镁设计研究院有限公司 | Direct-current side networking operation networking method for double-power-source rectification system |
| CN104078970B (en) * | 2013-03-29 | 2016-04-27 | 沈阳铝镁设计研究院有限公司 | The network-building method of dual power supply commutation system DC side networking operation |
| CN103178523B (en) * | 2013-04-16 | 2015-08-12 | 四川英杰电气股份有限公司 | A kind of big current current supply circuit |
| CN103178523A (en) * | 2013-04-16 | 2013-06-26 | 四川英杰电气股份有限公司 | Large-current power supply loop |
| CN105322506A (en) * | 2014-06-26 | 2016-02-10 | 沈阳铝镁设计研究院有限公司 | Reverse current protection rectifier unit |
| CN108352703A (en) * | 2015-08-27 | 2018-07-31 | 代尔夫特理工大学 | DC switch yards and the method for operating the DC switch yards |
| CN108352703B (en) * | 2015-08-27 | 2019-12-31 | 代尔夫特理工大学 | DC switch field and method for operating the same |
| CN109959129A (en) * | 2017-12-14 | 2019-07-02 | 株洲中车时代电气股份有限公司 | A kind of integral frequency conversion controller for screw machine central air-conditioning |
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| CN100461574C (en) | 2009-02-11 |
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Owner name: SHENYANG ALUMINUM + MAGNESIUM ENGINEERING + RESEAR Free format text: FORMER NAME: SHENYANG ALUMINIUM AND MAGNESIUM DESIGN INST. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 110001 Heping Street, Heping District, Liaoning, Shenyang, No. 184 Patentee after: Shenyang Aluminum & Magnesium Engineering & Research Institute Co., Ltd. Address before: 110001 Heping Street, Heping District, Liaoning, Shenyang, No. 184 Patentee before: Shenyang Aluminium and Magnesium Design Institute |