CN204810154U - Four posts three -phase compensation formula low pressure voltage regulator unshakable in one's determination - Google Patents
Four posts three -phase compensation formula low pressure voltage regulator unshakable in one's determination Download PDFInfo
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- CN204810154U CN204810154U CN201520636081.4U CN201520636081U CN204810154U CN 204810154 U CN204810154 U CN 204810154U CN 201520636081 U CN201520636081 U CN 201520636081U CN 204810154 U CN204810154 U CN 204810154U
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Abstract
The utility model provides a four posts three -phase compensation formula low pressure voltage regulator unshakable in one's determination comprises correction transformer and powerstat, and the correction transformer adopts four posts of three -phase structure unshakable in one's determination, three posts of powerstat adoption three -phase structure unshakable in one's determination, wherein, the secondary winding of correction transformer establishes ties in distribution lines, and the primary winding of correction transformer and powerstat tap are connected. Because the correction transformer has adopted four post iron core transformers of three -phase, compensate effectual, the zero sequence loss is little, can reduce the whole volume and the weight of product widely, has reduced manufacturing, operation, cost of transportation effectively, the application region is more extensive.
Description
Technical field
The utility model belongs to power system device technical field, relates to a kind of voltage regulator, especially a kind of compensation low-pressure adjusting depressor of three-phase of electric power system.
Background technology
Along with developing rapidly of China's economy, electrical network electricity consumption scale constantly increases, although each electric company all actively adopts measures, the power consumption of rapid growth and current electric grid are powered and electric network composition still differs greatly.The electrical network low voltage problem that overload causes is very serious, and low-voltage complains phenomenon very general.Which kind of measure is taked to solve current electrical network low voltage problem extremely urgent.
Electrical network low voltage control measures conventional at present has several as follows: (1) installs reactive-load compensator boosting; (2) autotransformer boosting is installed; (3) the distribution transformer output voltage boosting of platform district is heightened; (4) 10kV circuit is extended, newly-increased distribution transformer boosting; (5) take the compensation voltage regulator boosting of low-voltage circuit is installed.
But (1)-(4) all there is certain defect in described method: although reactive-load compensator can reduce apparent current, reduce line drop, indirectly reach the object of electrical network boosting, but its impact by low-voltage circuit power factor is comparatively large, there is limitation; Directly boosted by autotransformer, identical capacity situation lower device consumptive material is many, weight is large, volume is large, and not only cost is high, and due to weight large, it is installed, transport and maintenance cost also increase greatly; By heightening the output voltage of platform district distribution transformer, the low-voltage problem of platform district nearby users can be solved, easily causing electrical network head end voltage higher but then, the low-voltage problem caused because radius of electricity supply is long can not be solved; Adopt and extend 10kV circuit, the method for newly-increased distribution transformer, certainly can solve the low problem of voltage, but cost can be very high.
Facts have proved, for 400V line arrangement longer and 10kV circuit not easily extend less than region, taking to install the compensation voltage regulator of low-voltage circuit is choose reasonable.
Because the zero sequence loss unshakable in one's determination of three-phase three-column iron-core transformer is very large, the compensation voltage regulator generally adopted at present all adopts three-phase group formula transformer (Single Phase Transformer Set), namely be made up of three single-phase compensation voltage regulators, its magnetic circuit is made up of three groups of (6) independent iron cores, independent of one another on magnetic circuit, unrelated (see the magnetic circuit schematic diagram of Fig. 1, its operation principle as shown in Figure 2).
But because Single Phase Transformer Set compensated regulator adopts three-phase group formula transformer, the space of needs is far longer than a three-phase transformer, and manufacturing cost, cost of transportation increase a lot.And no-load loss and load loss large compared with single three-phase transformer, too increase operating cost.
Utility model content
The utility model is for avoiding the deficiency that exists in above-mentioned prior art, provides a kind of four posts three-phase unshakable in one's determination compensation low-pressure adjusting depressor, to reduce making and operating cost and to improve electrical reliability.
The utility model adopts following technical scheme: the compensation low-pressure adjusting depressor of a kind of four posts three-phase unshakable in one's determination, is made up of compensator transformer and voltage regulating transformer, and compensator transformer adopts three-phase and four-pole core construction, voltage regulating transformer to adopt three-phase three-column core construction;
Wherein, the secondary windings in series of compensator transformer is in distribution line, and a winding of compensator transformer is connected with voltage regulating transformer tap;
The input of the compensation low-pressure adjusting depressor of four posts three-phase unshakable in one's determination is provided with circuit breaker, and output is provided with the second contactor.
Further, the compensation low-pressure adjusting depressor of four posts three-phase unshakable in one's determination is also provided with the first contactor, described first contactor cross-over connection, is connected in parallel on circuit breaker and the second contactor.
The compensation low-pressure adjusting depressor of a kind of four posts of the present utility model three-phase unshakable in one's determination, its compensator transformer adopts three-phase and four-pole iron-core transformer, and compensation effect is good, zero sequence loss is little, can reduce overall volume and the weight of product widely.Significantly reduce manufacture, operation, cost of transportation, application region is more extensive.
Accompanying drawing explanation
Fig. 1 is three-phase group formula single-phase transformer magnetic circuit schematic diagram;
Fig. 2 is single-phase compensation voltage regulator operation schematic diagram;
Fig. 3 is three-phase and four-pole transformer iron circuit schematic diagram;
Fig. 4 is the compensation voltage regulator operation schematic diagram of three-phase.
Show in figure, hereafter NM symbol such as TAa, QF, Km, A-C, a-c, X-Z, x-z, A1, N, n etc. be the schematic symbols of the electric power/distribution transformer of this area routine, circuit breaker, contactor, transformer Same Name of Ends, rated point, power line, and other are as complementary symbols such as voltmeters.Although wherein same-sign represents different parts respectively, be this area legend symbol routinely, not the understanding of influence technique scheme.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.
The compensation low-pressure adjusting depressor of four posts of the present utility model three-phase unshakable in one's determination, is made up of compensator transformer and voltage regulating transformer, and wherein, compensator transformer adopts three-phase and four-pole core construction, voltage regulating transformer to adopt three-phase three-column core construction.
See accompanying drawing 3, because compensator transformer have employed three-phase and four-pole core construction, provide loop to zero sequence fluxes Φ O unshakable in one's determination, magnetic resistance is little, reactance is large, effectively reduces zero sequence loss.Φ oA, Φ oB, Φ oC represent A, B, C phase magnetic flux unshakable in one's determination respectively.
See accompanying drawing 4, the secondary winding (TBa, TBb, TBc) of three-phase compensator transformer be connected on respectively in distribution line (i.e. electrical network main line), a winding of compensator transformer is connected with the tap of voltage regulating transformer (TVa, TVb, TVc).By changing the link position of compensator transformer winding and voltage regulating transformer tap, compensator transformer winding will input different voltage, and the secondary winding of compensator transformer creates bucking voltage with regard to induction.Concrete boosting principle can see Fig. 2, if disregard the pressure drop of compensator transformer secondary impedance:
Output voltage Uao=input voltage Uai+ bucking voltage UBa.
Because the size of bucking voltage UBa is provided by voltage regulating transformer, therefore claim this boosting mode for " regulating compensation formula ".
In the utility model, compensator transformer capacity=voltage compensation percentage * rated load-capacity (if namely voltage compensates 20%, then compensator transformer capacity is 20% of load capacity), volume output that therefore can be larger by less volume controlled.
For the TBa phase shown in Fig. 4, the initial position that compensator transformer winding is connected with voltage regulating transformer tap is rated point A1, in figure, arrow upwards represents that joint link position upwards then heightens output voltage, and downward arrow represents that joint link position then reduces output voltage downwards.
As shown in Figure 4, the distribution line input of the compensation low-pressure adjusting depressor of four posts of the present utility model three-phase unshakable in one's determination is also provided with three-phase low-voltage circuit breaker Q F, and the output of the compensation low-pressure adjusting depressor of four posts three-phase unshakable in one's determination is then provided with three-phase alternating current second contactor Km2.Three-phase alternating current first contactor Km1 cross-over connection, to be connected in parallel on circuit breaker Q F and the second contactor Km2.Wherein, the first contactor Km1 is open type, and the second contactor Km2 is closed type.
Also show measurement, control voltmeter in Fig. 4, wherein 1v, 2v, 5v are only schematic symbols, without practical significance.
Compared with Single Phase Transformer Set voltage regulator, it is good that three-phase and four-pole voltage regulator of the present utility model has compensation effect equally, the advantage that zero sequence loss is little, and arrange more rationally, can reduce overall volume and the weight of product widely, effectively reduce manufacturing and operating cost.Be particularly suitable for those border area, remote mountains users because of transport restrictions.
In a particular application, technical staff likely needs do indivedual adjustment as the case may be and change above content.Be only a preferred examples to explanation of the present utility model above, the restriction to the utility model content can not be understood to.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Claims (2)
1. the compensation low-pressure adjusting depressor of four posts three-phase unshakable in one's determination, is made up of compensator transformer and voltage regulating transformer; It is characterized in that:
Described compensator transformer adopts three-phase and four-pole core construction, and described voltage regulating transformer adopts three-phase three-column core construction;
Wherein, the secondary windings in series of described compensator transformer is in distribution line, and a winding of described compensator transformer is connected with the tap of voltage regulating transformer;
The input of the compensation low-pressure adjusting depressor of four posts three-phase unshakable in one's determination is provided with circuit breaker Q F, and the output of the compensation low-pressure adjusting depressor of four posts three-phase unshakable in one's determination is provided with the second contactor Km2.
2. the compensation low-pressure adjusting depressor of four posts as claimed in claim 1 three-phase unshakable in one's determination, is characterized in that: be also provided with the first contactor Km1, described first contactor Km1 cross-over connection, is connected in parallel on circuit breaker Q F and the second contactor Km2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520636081.4U CN204810154U (en) | 2015-08-21 | 2015-08-21 | Four posts three -phase compensation formula low pressure voltage regulator unshakable in one's determination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520636081.4U CN204810154U (en) | 2015-08-21 | 2015-08-21 | Four posts three -phase compensation formula low pressure voltage regulator unshakable in one's determination |
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| Publication Number | Publication Date |
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| CN204810154U true CN204810154U (en) | 2015-11-25 |
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| CN201520636081.4U Active CN204810154U (en) | 2015-08-21 | 2015-08-21 | Four posts three -phase compensation formula low pressure voltage regulator unshakable in one's determination |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800139A (en) * | 2016-09-05 | 2018-03-13 | 张玉强 | A kind of circuit pressure regulator |
| CN112039081A (en) * | 2020-07-10 | 2020-12-04 | 常州博瑞电力自动化设备有限公司 | Power supply system with high-power alternating-current power supply voltage stabilization and energy storage functions and control method |
-
2015
- 2015-08-21 CN CN201520636081.4U patent/CN204810154U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107800139A (en) * | 2016-09-05 | 2018-03-13 | 张玉强 | A kind of circuit pressure regulator |
| CN112039081A (en) * | 2020-07-10 | 2020-12-04 | 常州博瑞电力自动化设备有限公司 | Power supply system with high-power alternating-current power supply voltage stabilization and energy storage functions and control method |
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