CN201230299Y - Combination type multi-stage loaded capacity regulating box type transformer plant - Google Patents

Combination type multi-stage loaded capacity regulating box type transformer plant Download PDF

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Publication number
CN201230299Y
CN201230299Y CNU2008200140100U CN200820014010U CN201230299Y CN 201230299 Y CN201230299 Y CN 201230299Y CN U2008200140100 U CNU2008200140100 U CN U2008200140100U CN 200820014010 U CN200820014010 U CN 200820014010U CN 201230299 Y CN201230299 Y CN 201230299Y
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switch
low
capacity
transformer
voltage
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Expired - Lifetime
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CNU2008200140100U
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邵长青
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邵长青
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Abstract

The utility model relates to a combined and multistage on-load capacity regulating box-type transformer substation, which belongs to a power distributing substation, which is characterized in that the transformer part comprises two on-load capacity regulating transformers or electric non-excitation capacity regulating transformers which meet the operational conditions of the parallel connection; through the switching of an on-load capacity regulating switch or an electric non-excitation capacity regulation switch, two high-voltage coils and two low-voltage coils are respectively connected in parallel or in series, wherein, each phase of high-voltage windings is formed by the two high-voltage coils and each phase of low-voltage windings is formed by the two low-voltage coils. The control terminal of the capacity terminal or the electric non-excitation capacity regulating switch, the secondary leading-out terminal of an on-load current transformator, and the electric control leading-out terminal of the electric control high-voltage switch and the electric low-voltage switch of the two on-load capacity regulating switch or electric non-excitation capacity regulating transformers are respectively in electric connection with an automatic controller. The transformer substation solves the problems of larger open circuit loss and on-load voltage undulation of the prior art, and is suitable for the power distributing substations of urban networks, rural networks and enterprises.

Description

Combination type multilevel loaded capacity-regulation box type transformer station
Technical field
The utility model belongs to the closed distribution substation in the distribution system, is specially adapted to 10kV or 20kV level urban distribution network or rural power grids or enterprise's electrical network.
Background technology
At present, used box-type substation is main by the transformer of fixed capacity and the Electrocontrolled high-pressure switch between high-pressure side and high-voltage fence thereof, compositions such as the electronic control low-pressure switch between low-pressure side and load in the distribution system.The technical problem underlying of its existence is: because the capacity of its transformer portion fixes, so after itself and electrical network join, promptly produce exciting current and the bigger no-load loss that forms in transformer; Simultaneously, when reducing or increasing owing to load, output voltage also high and low fluctuation can occur, so voltage stability is relatively poor.
Summary of the invention
For solving the technical problem that exists in the prior art, the utility model will provide a kind of no-load loss, more stable combination type multilevel loaded capacity-regulation box type transformer station of voltage of reducing.
The technical scheme that the utility model solves the technical problem that exists in the prior art is: it comprises the Electrocontrolled high-pressure switch, transformer portion, the electronic control low-pressure switch, load current instrument transformer and automatic control equipment, its special character is: its transformer portion is by the switching through loaded capacity-regulated switch or electronic no excitation capacity transfer switch, and make two high-tension coils that constitute every phase high pressure winding and two low-voltage coils that constitute every phase low pressure winding, respectively become parallel connection or series connection, and two loaded capacity-regulated transformers or the electronic no excitation capacitance-adjustable transformer that meet the parallel running condition combine, its high-pressure side joins with same high voltage source after Electrocontrolled high-pressure switch in parallel separately, its low-pressure side is equipped with the load current instrument transformer on the load circuit after the electronic control low-pressure switch in parallel separately, the secondary leading-out terminal of load current instrument transformer, the automatically controlled leading-out terminal of Electrocontrolled high-pressure switch and the automatically controlled leading-out terminal of electronic control low-pressure switch, the control end of loaded capacity-regulated switch or electronic no excitation capacity transfer switch connects with automatic control equipment is electric respectively; Two loaded capacity-regulated transformers or electronic no excitation capacitance-adjustable transformer can also be contained in the shared casing.
The utility model beneficial effect compared with the prior art is:
1, because transformer portion of the present utility model is to adopt two loaded capacity-regulated transformers or electronic no excitation capacitance-adjustable transformer to combine, and after Electrocontrolled high-pressure switch in parallel separately, join with same high voltage source, after electronic control low-pressure switch in parallel separately, join with load circuit, and the load current instrument transformer is housed on load circuit, also is provided with automatic control equipment simultaneously.Therefore, when load variations, the load current that records through current transformer is input to automatic control equipment, switch by automatic control equipment control Electrocontrolled high-pressure switch or electronic control low-pressure switch, or loaded capacity-regulated switch or electronic no excitation capacity transfer switch are carried out serial or parallel connection to two low-voltage coils of two high-tension coils of every phase high pressure winding of two loaded capacity-regulated transformers or electronic no excitation capacitance-adjustable transformer and every winding of low pressure mutually respectively switch, just can obtain not at the same level time capacity output, reach the purpose of adjusting different capabilities by the size of load.When two high-tension coils of every phase high pressure winding of transformer switch to series connection by parallel connection, the circle voltage of every phase winding of transformer reduces half, no-load loss is also correspondingly along with reducing significantly simultaneously, and when load during only near arbitrary capacity of this two transformers, another transformer can be controlled Electrocontrolled high-pressure switch and electronic control low-pressure switch excision operation by automatic control equipment, has so just reduced no-load loss widely; Equally, because the capacity of output has reduced the fluctuation of voltage near the capacity of load, keep the relatively stable of load voltage.
2, because above-mentioned automatic multi-step capacity transfer all instructs automatic control equipment to carry out by load current, so automatization level is higher.
3, also loaded capacity-regulated transformer or electronic no excitation capacitance-adjustable transformer can be contained in the shared casing owing to the utility model, so compact conformation.
Description of drawings
Fig. 1 is the electrical structure schematic diagram of the utility model embodiment;
Fig. 2 is that two low-voltage coils of two high-tension coils of every phase high pressure winding of a loaded capacity-regulated transformer or electronic no excitation capacitance-adjustable transformer and every winding of low pressure are mutually connected respectively and are incorporated into the power networks a kind of embodiment electrical structure schematic diagram when another excises with the networking;
Fig. 3 be two high-tension coils of every phase high pressure winding of a loaded capacity-regulated transformer or electronic no excitation capacitance-adjustable transformer and every winding of low pressure mutually two low-voltage coils respectively parallel connection be incorporated into the power networks a kind of embodiment electrical structure schematic diagram when another excises with the networking;
Fig. 4 connects respectively for two low-voltage coils of two high-tension coils of every phase high pressure winding of another loaded capacity-regulated transformer or electronic no excitation capacitance-adjustable transformer and every winding of low pressure mutually and is incorporated into the power networks, a kind of embodiment electrical structure schematic diagram when excising with the networking;
Fig. 5 is two loaded capacity-regulated transformers or electronic no excitation capacitance-adjustable transformer, a kind of embodiment electrical structure schematic diagram that two high-tension coils of each every phase high pressure winding and two low-voltage coils of every winding of low pressure mutually are incorporated into the power networks after respectively connecting respectively;
Fig. 6 is that two low-voltage coils of two high-tension coils of every phase high pressure winding of a loaded capacity-regulated transformer or electronic no excitation capacitance-adjustable transformer and every winding of low pressure mutually are in parallel respectively, after two high-tension coils of another every phase high pressure winding and two low-voltage coils of every winding of low pressure are mutually connected respectively, two a kind of embodiment electrical structure schematic diagrames that are incorporated into the power networks;
Fig. 7 is a loaded capacity-regulated transformer or electronic no excitation capacitance-adjustable transformer and networking excision, a kind of embodiment electrical structure schematic diagram that two high-tension coils of another every phase high pressure winding and two low-voltage coils of every winding of low pressure mutually are incorporated into the power networks after the parallel connection respectively;
Fig. 8 is that two high-tension coils of every phase high pressure winding of a loaded capacity-regulated transformer or electronic no excitation capacitance-adjustable transformer and two low-voltage coils of every winding of low pressure are mutually connected respectively, after two low-voltage coils difference parallel connection of two high-tension coils of another every phase high pressure winding and every winding of low pressure mutually, two a kind of embodiment electrical structure schematic diagrames that are incorporated into the power networks;
Fig. 9 be two high-tension coils of two loaded capacity-regulated transformers or electronic each every phase high pressure winding of no excitation capacitance-adjustable transformer and every winding of low pressure mutually two low-voltage coils each respectively after parallel connection, a kind of embodiment electrical structure schematic diagram that is incorporated into the power networks;
Figure 10 is two loaded capacity-regulated transformers or the shared body structure schematic diagram of electronic no excitation capacitance-adjustable transformer.
Among the figure: 1, the Electrocontrolled high-pressure switch, 101, the automatically controlled terminals of Electrocontrolled high-pressure switch, 2, loaded capacity-regulated transformer or electronic no excitation capacitance-adjustable transformer, 201, the high pressure winding, 2011, high-tension coil, 202, the low pressure winding, 2021, low-voltage coil, 203, loaded capacity-regulated switch or electronic no excitation capacity transfer switch, 3, the electronic control low-pressure switch, 301, the automatically controlled leading-out terminal of electronic control low-pressure switch, 4, the load current instrument transformer, 5, automatic control equipment, 6, high-tension current inductor, 7, high voltage potential transformer, 8, isolating switch, 9, casing, I, a loaded capacity-regulated transformer or electronic no excitation capacitance-adjustable transformer, II, another loaded capacity-regulated transformer or electronic no excitation capacitance-adjustable transformer.
With reference to Fig. 1~Figure 10.The utility model comprises Electrocontrolled high-pressure switch 1, transformer portion, electronic control low-pressure switch 3, load current instrument transformer 4 and automatic control equipment 5.Its special character is: its transformer portion is by the switching through loaded capacity-regulated switch or electronic no excitation capacity transfer switch 203, and make two high-tension coils 2011 constituting every phase high pressure winding 201 and two low-voltage coils 2021 of the every winding of low pressure mutually 202 of formation, respectively become serial or parallel connection, and two loaded capacity-regulated transformers or the electronic no excitation capacitance-adjustable transformer 2 that meet the parallel running condition combine, its high-pressure side joins with same high voltage source after Electrocontrolled high-pressure switch 1 parallel connection separately, its low-pressure side is equipped with load current instrument transformer 4 on the load circuit after electronic control low-pressure switch 3 parallel connections separately, the secondary leading-out terminal of load current instrument transformer 4, the automatically controlled leading-out terminal 101 of Electrocontrolled high-pressure switch and the automatically controlled leading-out terminal 301 of electronic control low-pressure switch, the control end of loaded capacity-regulated switch or electronic no excitation capacity transfer switch 203 respectively with 5 electric connections of automatic control equipment.High voltage source is introduced through isolating switch 8, and high voltage potential transformer 7 and high-tension current inductor 6 can be housed on power line, and its secondary outlet is connected to automatic control equipment 5.Two loaded capacity-regulated transformers or electronic no excitation capacitance-adjustable transformer 2 also can shared casings 9.
For the convenience of narrating below, be I with the table scale in two loaded capacity-regulated transformers or the electronic no excitation capacitance-adjustable transformer, another table scale is II.The capacity of I and II can be the same or different, below a kind of embodiment capacity of establishing II be three times of the capacity of I, the connection of transformer is mutually more, establishing this joint group of two all is Y, yn.
When a kind of embodiment of the present utility model when isolating switch 8 is incorporated into the power networks, if I and II Electrocontrolled high-pressure switch 1 and automatically controlled high low switch 3 separately all are in "on" position, and two high-tension coils 2011 of I and II every winding of high pressure mutually 201 separately and two low-voltage coils 2021 of every winding of low pressure mutually 202 are in state in parallel separately respectively, the of the present utility model maximum output capacity of this moment is the total capacity of I and II, be heap(ed) capacity, as shown in Figure 9; If load reduce to total capacity 7/8ths and greater than 6/8ths o'clock, load current signal through load current instrument transformer 4 is input to automatic control equipment 5, automatic control equipment 5 is through the loaded capacity-regulated switch of I or the control end of electronic no excitation capacity transfer switch 203, make two high-tension coils 2011 of every phase of I switch to series connection respectively with every two low-voltage coils 2021 mutually, the of the present utility model maximum output capacity of this moment is the capacity that the capacity of 1/2nd I adds II, be 7/8ths of total capacity, as shown in Figure 8; If through load current instrument transformer 4 be input to load capacity that automatic control equipment 5 records be I and II total capacity 6/8ths and greater than 5/8ths o'clock, automatic control equipment 5 will make the Electrocontrolled high-pressure switch 1 of I and electronic control low-pressure switch 3 cut off respectively automatically, make I out of service, the capacity that this moment, maximum output capacity of the present utility model was II, be 6/8ths of I and II total capacity, as shown in Figure 7; If load capacity be reduced to I and II total capacity 5/8ths and greater than 4/8ths o'clock, same automatic control equipment 5 makes two high-tension coils 2011 of every phase of I in parallel respectively with every two low-voltage coils 2021 mutually, the electronic control low-pressure switch 3 of I and Electrocontrolled high-pressure switch 1 close a floodgate respectively, two high-tension coils 2011 of every phase of II are connected respectively with every two low-voltage coils 2021 mutually, at this moment maximum output capacity of the present utility model is 5/8ths of I and an II total capacity, as shown in Figure 6; If load drop to I and II total capacity 4/8ths and greater than 3/8ths o'clock, same automatic control equipment 5 will make two high-tension coils 2011 of every phase of I switch to series connection respectively with every two low-voltage coils 2021 mutually, the capacity that this moment, maximum output capacity of the present utility model was 1/2nd I adds the capacity of 1/2nd II, be 4/8ths of total capacity, as shown in Figure 5; If load capacity drop to I and II total capacity 3/8ths and greater than 2/8ths o'clock, automatic control equipment 5 will make the Electrocontrolled high-pressure switch 1 of I and electronic control low-pressure switch 3 cut off respectively automatically, make I out of service, at this moment maximum output capacity of the present utility model is half of II capacity, be 3/8ths of I and II total capacity, as shown in Figure 4; When load drop to I and II total capacity 2/8ths and greater than eight/for the moment, automatic control equipment 5 will make two high-tension coils 2011 of every phase of I in parallel respectively with every two low-voltage coils 2021 mutually, and the electronic control low-pressure switch 3 of I and Electrocontrolled high-pressure switch 1 are closed a floodgate respectively, I puts into operation, and the electronic control low-pressure switch 3 of II and Electrocontrolled high-pressure switch 1 are cut off respectively, make II out of service, at this moment maximum output capacity of the present utility model is the capacity of I, be 2/8ths of I and II total capacity, as shown in Figure 3; If load capacity drop to I and II total capacity 1/8th and greater than zero the time, automatic control equipment 5 will make two high-tension coils 2011 of every phase of I connect respectively with every two low-voltage coils 2021 mutually automatically, at this moment the utility model maximum output capacity is half of I capacity, be I and II total capacity 1/8th, as shown in Figure 2; When dropping to zero as load capacity, automatic control equipment will make the electronic control low-pressure switch 3 of I and Electrocontrolled high-pressure switch 1 cut off, and makes I out of service.
Also can on basis of the present utility model, constitute by other transformer in parallel again.

Claims (2)

1, combination type multilevel loaded capacity-regulation box type transformer station, comprise the Electrocontrolled high-pressure switch, transformer portion, the electronic control low-pressure switch, load current instrument transformer and automatic control equipment, it is characterized in that: its transformer portion is by the switching through loaded capacity-regulated switch or electronic no excitation capacity transfer switch, and make two high-tension coils that constitute every phase high pressure winding and two low-voltage coils that constitute every phase low pressure winding, respectively become parallel connection or series connection, and two loaded capacity-regulated transformers or the electronic no excitation capacitance-adjustable transformer that meet the parallel running condition combine, its high-pressure side joins with same high voltage source after Electrocontrolled high-pressure switch in parallel separately, its low-pressure side is equipped with the load current instrument transformer on the load circuit after the electronic control low-pressure switch in parallel separately, the secondary leading-out terminal of load current instrument transformer, the automatically controlled leading-out terminal of Electrocontrolled high-pressure switch and the automatically controlled leading-out terminal of electronic control low-pressure switch, the control end of loaded capacity-regulated switch or electronic no excitation capacity transfer switch connects with automatic control equipment is electric respectively.
2, combination type multilevel loaded capacity-regulation box type transformer station according to claim 1 is characterized in that: two loaded capacity-regulated transformers or electronic no excitation capacitance-adjustable transformer also can be contained in the shared casing.
CNU2008200140100U 2008-07-14 2008-07-14 Combination type multi-stage loaded capacity regulating box type transformer plant Expired - Lifetime CN201230299Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008200140100U CN201230299Y (en) 2008-07-14 2008-07-14 Combination type multi-stage loaded capacity regulating box type transformer plant

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Application Number Priority Date Filing Date Title
CNU2008200140100U CN201230299Y (en) 2008-07-14 2008-07-14 Combination type multi-stage loaded capacity regulating box type transformer plant

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CN201230299Y true CN201230299Y (en) 2009-04-29

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104242669A (en) * 2014-09-29 2014-12-24 国家电网公司 Distribution transformer with automatic capacity regulating function
CN104252959A (en) * 2014-09-18 2014-12-31 国家电网公司 Energy-saving on-load capacity regulating transformer and intelligent high and low capacity switching method thereof
CN104377017A (en) * 2014-12-05 2015-02-25 北京博瑞莱智能科技集团有限公司 On-load regulated capacity transformer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104252959A (en) * 2014-09-18 2014-12-31 国家电网公司 Energy-saving on-load capacity regulating transformer and intelligent high and low capacity switching method thereof
CN104242669A (en) * 2014-09-29 2014-12-24 国家电网公司 Distribution transformer with automatic capacity regulating function
CN104377017A (en) * 2014-12-05 2015-02-25 北京博瑞莱智能科技集团有限公司 On-load regulated capacity transformer
CN104377017B (en) * 2014-12-05 2017-05-10 北京博瑞莱智能科技集团有限公司 On-load regulated capacity transformer

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Granted publication date: 20090429

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