CN203942248U - Based on the DC de-icing device under 12-phase rectification with induced voltage inhibit feature - Google Patents
Based on the DC de-icing device under 12-phase rectification with induced voltage inhibit feature Download PDFInfo
- Publication number
- CN203942248U CN203942248U CN201420305093.4U CN201420305093U CN203942248U CN 203942248 U CN203942248 U CN 203942248U CN 201420305093 U CN201420305093 U CN 201420305093U CN 203942248 U CN203942248 U CN 203942248U
- Authority
- CN
- China
- Prior art keywords
- rectifier
- bridge rectifier
- load unit
- terminals
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of DC de-icing device based on having induced voltage inhibit feature under 12-phase rectification, comprises three-phase three-winding transformer, bridge rectifier and load unit, wherein; Described bridge rectifier comprises the first bridge rectifier and the second bridge rectifier, and each bridge rectifier composes in parallel by three groups of rectifier diode groups, and every group of rectifier diode group is in series by two rectifier diodes.The former limit winding of described three-phase three-winding transformer adopts star connection, and the first secondary winding adopts star connection, and the second secondary winding adopts delta connection.Described load unit comprises the each shunt capacitance that connects of two terminals of a load (transmission line) and load.The utility model adopts rectifier transformer, can, for dissimilar and circuit length, provide the ice melting current and the direct voltage that need, is beneficial to the selection of rectifier working point, and adaptability is better.
Description
Technical field
The utility model relates to a kind of DC ice melting circuit based on having induced voltage inhibit feature under 12-phase rectification.
Background technology
Nearly kind more than 30 of ice-removing and ice-preventing technology, can roughly be divided into thermal ice-melting method, mechanical deicing's method, natural passive means, chemical coating method etc. by its operation principle both at home and abroad, with regard to de-icing technology, mainly refers at present all kinds of thermal ice-melting methods.The general principle of thermal ice-melting method is to pass on the line higher than the transmission current of normal current density to carry out ice-melt to obtain Joule heat.DC ice melting technology mainly refers to when line ice coating phenomenon is serious, icing circuit two ends are disconnected with major network, and by line end short circuit, simultaneously in circuit head end access DC power supply, make it to form a loop, thereby using circuit to make to adhere to ice sheet on the line by larger current heating melts to come off and alleviates the burden of circuit, and then prevent breaking of circuit and collapsing of steel tower, ensure transmission line safety, when completing after deicing task, can, by the excision of DC ice melting equipment, return to normal condition.The DC de-icing device of main flow has SVC function concurrently at present, utilize Dynamic Reactive Power Compensation Principle, can provide idle (capacitive) to electrical network, also can absorb electrical network unnecessary idle (perception), can provide large-scale ice melting current, from 400A to 5400A.While being switched to DC ice melting state due to device, can cause fluctuation to electrical network, cause the protections such as the overvoltage, overcurrent, capacity unmbalance of electrical network; The interference problem of harmonic wave to system that deicing device produces, and double-circuit line the ice-melt same period is also not to be solved on the impact of steel tower unbalanced tensile force.
Utility model content
For the problems referred to above, it is a kind of based on the whole dirty DC de-icing device with induced voltage inhibit feature of ten two-phases that the purpose of this utility model is to provide.
For achieving the above object, a kind of DC de-icing device based on having induced voltage inhibit feature under 12-phase rectification described in the utility model, is characterized in that, comprises three-phase three-winding transformer, bridge rectifier and load unit, wherein;
Described bridge rectifier comprises the first bridge rectifier and the second bridge rectifier, and each bridge rectifier forms by two groups of three-plase half wave rectifier circuits;
The former limit winding of described three-phase three-winding transformer adopts star connection, and the first secondary winding adopts star connection, and the second secondary winding adopts delta connection; Three terminals of described the first secondary winding are connected in three groups of rectifier diode groups of the first bridge rectifier between two rectifier diodes; Three terminals of described the second secondary winding are connected in three groups of rectifier diode groups of the second bridge rectifier between two rectifier diodes;
Described load unit comprises the shunt capacitance that transmission line and transmission line two ends connect;
One terminals of described the first bridge rectifier and the second bridge rectifier are connected a balanced capacitor, and described balanced capacitor connects the first load unit in parallel and terminals of the second load unit; Another wiring of described the first bridge rectifier and the second bridge rectifier is connected terminals of the 3rd load unit; Another terminals of described the 3rd load unit connect the first load unit in parallel and another terminals of the second load unit.
The beneficial effects of the utility model are:
1, the utility model adopts rectifier transformer, can, for dissimilar and circuit length, provide the ice melting current and the direct voltage that need, is beneficial to the selection of rectifier working point, and adaptability is better, reduces harmonic content.
2, the utility model does not need transformer tap to regulate, and can meet the ice-melt needs of all outlets in station.
3, the utility model adopts 12 pulse the mutually harmonic wave and the reactive loss that produce when wiring can reduce work, little on network system impact, can reduce reactive power compensation and filter apparatus are installed, and saves cost and occupation of land.
Brief description of the drawings
Fig. 1 is the structured flowchart of DC ice melting circuit described in the utility model embodiment.
Embodiment
Below in conjunction with Figure of description, the utility model is further described.
Be illustrated in figure 1 a kind of DC ice melting circuit based on 12-phase rectification with induced voltage inhibit feature, comprise three-phase three-winding transformer, bridge rectifier and load unit, wherein;
Described bridge rectifier comprises the first bridge rectifier 4 and the second bridge rectifier 5, and each bridge rectifier is by by two groups of three-plase half wave rectifier circuits, and common cathode diode group and co-anode diode group are in series.
The former limit winding 1 of described three-phase three-winding transformer adopts star connection, and a1, b1, c1 in the first secondary winding 2 adopt star connection, and a2, b2, c2 in the second secondary winding 3 adopt delta connection.And every phase number of turn of two secondary windings is identical.Like this, the line voltage value of two secondary windings of transformer equates.Three terminals of described the first secondary winding are connected in three groups of rectifier diode groups of the first bridge rectifier between two rectifier diodes; Three terminals of described the second secondary winding are connected in three groups of rectifier diode groups of the second bridge rectifier between two rectifier diodes.Described load unit comprises the shunt capacitance 6 at transmission line 7 and transmission line two ends.Dual loop transmission line, in the time of ice-melt, due to the existence of high voltage electric field, can induce voltage in DC ice-melting, adds that shunt capacitance can effectively suppress induced voltage in DC ice-melting, the fail safe of assurance device operation.The load of foregoing description here, for transmission of electricity circuit, when ice-melt, need to utilize Joule law on transmission line, to produce heat, and the icing thawing on circuit is come off.But because transmission line length is larger, in loop, produce larger impedance, expend a large amount of electric energy.In order to reduce the impedance in loop, the A in transmission line, B, C grouping can be switched to ice-melt, can reduce like this energy consumption.Described the first bridge rectifier in parallel and terminals of the second bridge rectifier are connected a balanced capacitor, and described balanced capacitor connects the first load unit in parallel and terminals of the second load unit; Described the first bridge rectifier in parallel and another wiring of the second bridge rectifier are connected terminals of the 3rd load unit; Another terminals of described the 3rd load unit connect the first load unit in parallel and another terminals of the second load unit.
As shown in the figure, due to a, the b end of the first bridge rectifier, what connect is the line voltage of transformer secondary winding a1, b1 phase, and a of the second bridge rectifier, b end what connect is the phase voltage of transformer secondary winding a2 phase, what therefore two groups of bridges connect is the three-phase voltage that two phase differences are 30, voltage swing is the same.If exist without interphase reactor Lp, when the first bridge rectifier conducting, the rectifier cell of the second bridge rectifier is ended by back-pressure; And when the second bridge rectifier conducting, the rectifier cell of the first bridge rectifier is ended by back-pressure, any moment only has one group of bridge in work, and whole load currents are provided.Two three-phase commutation bridge conductings simultaneously, and shared load current in circuit, are added after interphase reactor Lp.Like this, the conduction time of each rectifier cell and transformer secondary winding has increased by one times, and the output current of each rectifier bridge is only 1/2 load current.By identical the output voltage of two groups of rectifier bridges exportable waveform after interphase reactor parallel connection, differ 30 12 pulse wave rectifier voltages.
The utility model according to circuit grouping specific implementation is: A//B+C melts C phase line ice coating, and A//C+B melts B phase line ice coating, and A+B//C melts A phase line ice coating.When wherein 2 being in parallel while being in series with the 3rd, can greatly reduce impedance loop, according to series-parallel circuit resistance calculations method: suppose that each phase line impedance equates to be Rx, after the connection in series-parallel of each phase circuit, impedance loop is RL=Rx+Rx/2, be less than the 2 impedance RL=Rx+Rx that are in series, and can ensure to need according to Joule law to obtain higher energy PL=I on the circuit of ice-melt
2rx, time produce more heat on circuit, melt better faster icing.
Above; it is only preferred embodiment of the present utility model; but protection range of the present utility model is not limited to this; any be familiar with those skilled in the art the utility model disclose technical scope in; the variation that can expect easily or replacement, within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range that claim was defined.
Claims (1)
1. the DC de-icing device based on having induced voltage inhibit feature under 12-phase rectification, is characterized in that, comprises three-phase three-winding transformer, bridge rectifier and load unit, wherein;
Described bridge rectifier comprises the first bridge rectifier and the second bridge rectifier, and each bridge rectifier forms by two groups of three-plase half wave rectifier circuits;
The former limit winding of described three-phase three-winding transformer adopts star connection, and the first secondary winding adopts star connection, and the second secondary winding adopts delta connection; Three terminals of described the first secondary winding are connected in three groups of rectifier diode groups of the first bridge rectifier between two rectifier diodes; Three terminals of described the second secondary winding are connected in three groups of rectifier diode groups of the second bridge rectifier between two rectifier diodes;
Described load unit comprises the shunt capacitance that transmission line and transmission line two ends connect;
One terminals of described the first bridge rectifier and the second bridge rectifier are connected a balanced capacitor, and described balanced capacitor connects the first load unit in parallel and terminals of the second load unit; Another wiring of described the first bridge rectifier and the second bridge rectifier is connected terminals of the 3rd load unit; Another terminals of described the 3rd load unit connect the first load unit in parallel and another terminals of the second load unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420305093.4U CN203942248U (en) | 2014-06-10 | 2014-06-10 | Based on the DC de-icing device under 12-phase rectification with induced voltage inhibit feature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420305093.4U CN203942248U (en) | 2014-06-10 | 2014-06-10 | Based on the DC de-icing device under 12-phase rectification with induced voltage inhibit feature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203942248U true CN203942248U (en) | 2014-11-12 |
Family
ID=51861538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420305093.4U Active CN203942248U (en) | 2014-06-10 | 2014-06-10 | Based on the DC de-icing device under 12-phase rectification with induced voltage inhibit feature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203942248U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429472A (en) * | 2015-12-29 | 2016-03-23 | 湖南大学 | Star angle-shape rectifier-type high-power DC step-up converter and control method thereof |
-
2014
- 2014-06-10 CN CN201420305093.4U patent/CN203942248U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105429472A (en) * | 2015-12-29 | 2016-03-23 | 湖南大学 | Star angle-shape rectifier-type high-power DC step-up converter and control method thereof |
| CN105429472B (en) * | 2015-12-29 | 2018-07-27 | 湖南大学 | A kind of star-angle type rectifier type high power DC booster converter and its control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103915808B (en) | DC de-icing device based on voltage source converter and its control method | |
| CN105162155B (en) | A kind of series hybrid bipolar direct current transmission system with DC Line Fault ride-through capability | |
| CN201590771U (en) | Multipurpose large-power controllable power source | |
| CN101345419B (en) | Series voltage quality regulator and fast investment and cutting method | |
| CN203813384U (en) | DC deicing device based on voltage source converter | |
| CN103337870A (en) | Method for high-voltage direct-current transmission commutation failure prevention | |
| CN102623941B (en) | Direct current deicing device for 10KV rural power grid distribution line | |
| CN105048497A (en) | Doubly-fed wind turbine generator low-voltage ride through method | |
| CN105656051A (en) | Transient-energy dissipation device | |
| CN101794977B (en) | Long-distance transmission line deicing method and device | |
| CN205509501U (en) | Transient state energy dissipation device | |
| CN104578170A (en) | High-low-voltage ride-through device of thermal power generating unit auxiliary frequency converter | |
| CN205070452U (en) | Double -fed type wind turbine generator system high voltage system of passing through | |
| CN204721106U (en) | Based on the power transmission line overhead ground wire electromagnetism energy taking device of super capacitor | |
| CN204349576U (en) | A kind of d. c. remote electric power system alterating and direct current seamless switching device | |
| CN107707229B (en) | A kind of DC solid-state relay | |
| CN203942248U (en) | Based on the DC de-icing device under 12-phase rectification with induced voltage inhibit feature | |
| CN201623436U (en) | Direct-current ice melting device capable of being multiplexed into TSC | |
| CN201048291Y (en) | Parallel high voltage dynamic reactive compensator | |
| CN204376414U (en) | A kind of device having DC ice melting and static reactive function concurrently | |
| CN207625293U (en) | A kind of connection in series-parallel mixed type compensator | |
| CN107171270B (en) | Intensive deicing device constant current, constant pressure modularization dynamic passive compensation component | |
| CN202749783U (en) | Direct current ice melting and static var compensation device | |
| CN204030989U (en) | A kind of novel rectifying device cabinet | |
| CN103414242A (en) | Electrified railway in-phase power supplying method and standby machine structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LI WENAN Free format text: FORMER OWNER: WUHAN JINLANG ELECTRIC CO., LTD. Effective date: 20141216 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20141216 Address after: 430000, room 1, unit 55, Jinxiu H District, 888, National Road, East Lake hi tech Development Zone, Wuhan, Hubei, Patentee after: Li Wenan Address before: Wuhan University Science Park Road, building 430000 Hubei province Wuhan City venture East Lake high tech Development Zone 3 Building Room 1 Patentee before: Wuhan Jinlang Electric Co., Ltd. |