CN201188545Y - Modularization inductance adjusting device - Google Patents
Modularization inductance adjusting device Download PDFInfo
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- CN201188545Y CN201188545Y CNU2008200802534U CN200820080253U CN201188545Y CN 201188545 Y CN201188545 Y CN 201188545Y CN U2008200802534 U CNU2008200802534 U CN U2008200802534U CN 200820080253 U CN200820080253 U CN 200820080253U CN 201188545 Y CN201188545 Y CN 201188545Y
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/10—Flexible AC transmission systems [FACTS]
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Abstract
The utility model relates to a modularizing inductance adjusting device which belongs to the technical field of the dynamic reactive power compensation. The modularizing inductance adjusting device consists of a three-phase and three-winding transformer (1) and a low-voltage controllable silicon control reactor module group (2). The three-phase and three-winding transformer (1) is of a Y/Y/Delta connection, the high-voltage side is of a star connection, and a three-phase down-lead is switched in a three-phase electric fence. The low-voltage controllable silicon control reactor module group (2) consists of two TCR modules, wherein, one module is switched in a triangle winging at the low-voltage side of the three-phase and three-winding transformer and the other module is switched in a star winding so that the two modules form a module group. The utility model has the advantages that not only the reactive power is continuously adjustable, and the responding speed is fast, but also the harmonic wave of an injecting system is very small in the adjusting range of the whole capacity, and a filter device is not needed to be collocated; a low-voltage module parallel structure is adopted to facilitate the expansion of the system capacity and the redundancy design so as to improve the reliability of the system; a low-voltage topology is adopted to avoid the series connection of the parts so as to reduce the cost.
Description
Technical field
The utility model belongs to dynamic reactive power compensation technique field, and a kind of modularized inductance adjusting device particularly is provided.
Background technology
Reactive balance is to the economic benefit that improves electrical network and to improve power supply quality most important, and the formation of the big electrical network of superhigh pressure and load variations aggravation require a large amount of adjustable reactive power sources of response fast to adjust voltage, keep system's reactive power flow balance, reduce loss, improve power supply reliability.Thyristor controlled reactor (being designated hereinafter simply as TCR, Thyristor Controlled Reactor) has obtained extensive use in Electrical Power System Dynamic Reactive Power Control field, but also has many deficiencies.At first, be limited to the manufacture level of present thyristor valve, TCR needs the device series operation to bear high voltage when inserting the above electrical network of 6KV electric pressure; Secondly, TCR can produce bigger harmonic current, thereby needs to add auxiliary filter; At last, the price of high-voltage thyristor is very expensive.
The utility model provides a kind of new construction of modularized inductance adjusting device, it inserts high-pressure system by three-phase three-winding transformer after by the idle unit module parallel connection of many groups low pressure TCR, advantage such as the reactive power that not only has a TCR is adjustable continuously, response speed is fast, also overcome its deficiency, make the injected system harmonic wave minimum in the entire capacity adjustable range, need not extra filter; Adopt the low-voltage module parallel-connection structure, be convenient to power system capacity expansion and Redundancy Design, improved system reliability; The low pressure topology that adopts has been avoided the device series connection, has reduced cost.
Summary of the invention
The purpose of this utility model is to provide a kind of modularized inductance adjusting device, is used for the dynamic passive compensation of electric power system.It realizes regulating continuously fast of lagging reactive power based on TCR and phase control techniques; Realize 12 pulsation regulating effects based on three-phase three-winding transformer; Realize injecting mains by harmonics based on the parallel running of low-voltage reactive power power model and capacity grading control and minimize, have better combination property than the controlled reactor of traditional TCR structure.
The modularized inductance adjusting device basic circuit diagram that the utility model proposes is made up of two parts as shown in Figure 1, is respectively three-phase three-winding transformer 1 and low pressure thyristor controlled reactor module group 2.Be three module groups totally six modules shown in the figure, can increase the reactive power compensation capacity by increasing module group number in parallel during actual disposition.
Three-phase three-winding transformer is the wiring of Y/Y/ Δ, and the high-pressure side is star-star connection, and three phase terminals insert three phase network.Low-pressure side has two windings, is respectively star and delta connection, and its coil ratio is
Make the line voltage of two windings of low-pressure side be consistent.The three-phase lead-out wire of star and delta windings (totally 6) be connected respectively on three angles of TCR module.
Each module group is made of two TCR modules.Wherein, a module inserts the delta windings of three-phase three-winding transformer low-pressure side, and another module inserts the star winding, and two such modules constitute a module group.Each TCR module is connected into triangle by three TCR branch roads, and each TCR props up two inverse parallel controllable silicons of route formation of connecting with an iron-core reactor, the two ends parallel connection of inverse parallel controllable silicon resistance capaciting absorpting circuit with the protection controllable silicon.Resistance capaciting absorpting circuit is formed by resistance and capacitances in series.The TCR branch road of each module all can adopt phased or switching pattern.When needs increase controlled reactor reactive power compensation capacity, can many pack module operations in parallel.In controlled reactor operating any time, have only a module group (2 modules) to run on phased pattern, all the other modules run on the switching pattern.
The operation principle of modularized inductance adjusting device is summarized as follows.
SCR control angle α by each TCR branch road of control module changes between 90 °～180 °, realizes regulating in 0～heap(ed) capacity scope the controlled reactor electric current.Owing to adopt phased approach, can produce high order harmonic component in the branch road, when positive and negative half-wave trigger impulse was symmetrical, the amplitude of first-harmonic and harmonic current was only determined by pilot angle α.The topology of a module group can realize 12 pulsation effect, and promptly the number of times of the harmonic current of dynamic reactive power supply injected system is 12k ± 1, and k is a positive integer.Under the big trigger angle condition of the low capacity mode of having only a module group operation, high order harmonic component can occur in the line current of high-pressure side, but,, system not had influence substantially so the absolute value of harmonic current is minimum because the capacity of controlled reactor is very little at this moment.Under the big capacity mode that a plurality of module groups put into operation, because phased module group has only one, and the TCR branch road of other module groups is operated in full conducting (α=90 °) state, the promptly corresponding state that does not have harmonic wave, then the harmonic content of controlled reactor high-pressure side line current is minimum, can ignore.Therefore, do not need to dispose any filter, in the entire capacity adjustable range of controlled reactor, the harmonic wave of injected system all can satisfy the requirement of GB (GB/T 14549-1993).
Advantage of the present utility model is: not only have advantages such as reactive power is adjustable continuously, response speed is fast, make that also the harmonic wave of injected system is minimum in the entire capacity adjustable range, need not to dispose filter; Adopt the low-voltage module parallel-connection structure, be convenient to power system capacity expansion and Redundancy Design, improved system reliability; The low pressure topology that adopts has been avoided the device series connection, has reduced cost.
Description of drawings
Fig. 1 is the circuit structure diagram of a kind of modularized inductance adjusting device of the present utility model.Wherein, three-phase three-winding transformer 1, low pressure thyristor controlled reactor module group 2.
Embodiment
The basic circuit diagram of a kind of modularized inductance adjusting device that the utility model proposes is made up of two parts as shown in Figure 1, is respectively three-phase three-winding transformer 1 and low pressure thyristor controlled reactor module group 2.
Three-phase three-winding transformer is the wiring of Y/Y/ Δ, and the high-pressure side is star-star connection, and three phase terminals insert three phase network.Low-pressure side has two windings, is respectively star and delta connection, and its coil ratio is
Make the line voltage of two windings of low-pressure side be consistent.The three-phase lead-out wire of star and delta windings (totally 6) is connected respectively to and is connected on three angles of leg-of-mutton TCR module.
Each module group is made of two TCR modules.Wherein, a module inserts the delta windings of three-phase three-winding transformer low-pressure side, and another module inserts the star winding, and two such modules constitute a module group.Each TCR module is connected into triangle by three TCR branch roads, and each TCR props up two inverse parallel controllable silicons of route formation of connecting with an iron-core reactor, the two ends parallel connection of inverse parallel controllable silicon resistance capaciting absorpting circuit with the protection controllable silicon.Resistance capaciting absorpting circuit is formed by resistance and capacitances in series.The TCR branch road of each module all can adopt phased or switching pattern.When needs increase controlled reactor reactive power compensation capacity, can many pack module operations in parallel.In controlled reactor operating any time, have only a module group (2 modules) to run on phased pattern, all the other modules run on the switching pattern.
Claims (1)
1, a kind of modularized inductance adjusting device, it is characterized in that: form by three-phase three-winding transformer (1), low pressure thyristor controlled reactor module group (2), three-phase three-winding transformer (1) is the wiring of Y/Y/ Δ, and the high-pressure side is star-star connection, and three phase terminals insert three phase network; Low-pressure side has two windings, is respectively star and delta connection, and its coil ratio is 1:
Totally 6 of the three-phase lead-out wires of star and delta windings are connected respectively to and are connected on three angles of leg-of-mutton TCR module; Low pressure thyristor controlled reactor module group (2) is made of two TCR modules; Wherein, a module inserts the delta windings of three-phase three-winding transformer low-pressure side, and another module inserts the star winding of three-phase three-winding transformer low-pressure side, and two such modules constitute a module group; Each TCR module is connected into triangle by three TCR branch roads, and each TCR props up two inverse parallel controllable silicons of route formation of connecting with an iron-core reactor, the two ends parallel connection of inverse parallel controllable silicon resistance capaciting absorpting circuit with the protection controllable silicon; Resistance capaciting absorpting circuit is formed by resistance and capacitances in series, and the TCR branch road of each module all can adopt phased or switching pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200802534U CN201188545Y (en) | 2008-04-28 | 2008-04-28 | Modularization inductance adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200802534U CN201188545Y (en) | 2008-04-28 | 2008-04-28 | Modularization inductance adjusting device |
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| Publication Number | Publication Date |
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| CN201188545Y true CN201188545Y (en) | 2009-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200802534U Expired - Fee Related CN201188545Y (en) | 2008-04-28 | 2008-04-28 | Modularization inductance adjusting device |
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| CN (1) | CN201188545Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826063A (en) * | 2016-05-30 | 2016-08-03 | 东北农业大学 | Contactless on-load automatic positive and negative voltage regulating tap switch device for three-phase distribution transformer |
-
2008
- 2008-04-28 CN CNU2008200802534U patent/CN201188545Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826063A (en) * | 2016-05-30 | 2016-08-03 | 东北农业大学 | Contactless on-load automatic positive and negative voltage regulating tap switch device for three-phase distribution transformer |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090128 Termination date: 20110428 |