CN203278661U - Voltage-adjusting system of transformer - Google Patents
Voltage-adjusting system of transformer Download PDFInfo
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- CN203278661U CN203278661U CN 201320302104 CN201320302104U CN203278661U CN 203278661 U CN203278661 U CN 203278661U CN 201320302104 CN201320302104 CN 201320302104 CN 201320302104 U CN201320302104 U CN 201320302104U CN 203278661 U CN203278661 U CN 203278661U
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Abstract
The utility model discloses a voltage-adjusting system of a transformer. The voltage-adjusting system comprises a voltage source inverter power supply, a voltage-adjusting winding, and a computer controller. The voltage-adjusting winding is additionally applied to one side of the transformer and comprises a voltage-adjusting output winding and a voltage-adjusting coupling winding which are coupled mutually. The voltage-adjusting output winding is connected with the output end of the transformer. The voltage-adjusting coupling winding is connected with the voltage source inverter power supply. The computer controller is connected with the input end of the transformer, the output end of the transformer, and the voltage-adjusting output winding. By adjusting the amplitude and the phase of voltage of the voltage source inverter power supply, the amplitude and the phase of output voltage of the transformer, and active power outputted by the transformer can be adjusted continuously and smoothly.
Description
Technical field
The present invention relates to the control device of transformer regulating, can regulate the control device of transformer output voltage phase place and amplitude by continuously smooth in particular to a kind of transformer net side or valve side increase adjusting winding.
Background technology
Transformer is the alternating current of input (net side) to be converted to the AC power supply device of output (valve side) required voltage, the output voltage adjustment of transformer is all generally to increase the multistage voltage regulation coil and change the adjusting that the voltage regulation coil connection mode has the discontinuity of gear by net side or valve side, perhaps increases the mode regulation voltage of reactor in a side.Front a kind of discontinuous while of regulating and controlling mode is regulated easy damage adjusting device (or tap changer) frequently, need to reduce Load Regulation during on-load voltage regulation; As adopting the regulative mode that increases reactor, its transformer iron core loss is larger, has reduced system effectiveness.
Summary of the invention
The invention provides a kind of transformer regulating system.
The technical solution adopted for the present invention to solve the technical problems is: comprise voltage source inverter, pressure regulation winding, computer controller; A side at transformer is set up the pressure regulation winding, and described pressure regulation winding comprises pressure regulation output winding and the pressure regulation coupling winding that intercouples, and described pressure regulation output winding connects the transformer output, and described pressure regulation coupling winding connects the voltage source inverter; Described computer controller connects respectively transformer input, transformer output and described pressure regulation output winding.
Further, described voltage source inverter is that rectification circuit connects inverter circuit.
By injecting a quadrature voltage component, can realize the movement of voltage-phase in the three-phase transformer electric power system.The amplitude of regulating this quadrature voltage component reaches the controllability of any movement of voltage-phase.Due to this function being arranged, use this phase shifting transformer can be used to alleviate the power circulation of interconnected systems.
By injecting an in-phase voltage component, can realize the change of voltage magnitude in the three-phase transformer electric power system.The amplitude of regulating this in-phase voltage component reaches the controllability of any adjusting of output voltage.
In the three-phase transformer electric power system, regulate the active power of output of high-power transformer by the voltage source inverter of low capacity.
For can continuously smooth regulation output voltage, do not increase simultaneously core loss, the present invention designs a kind of transformer regulating control mode, a side at transformer increases a pressure regulation winding, the voltage coupling that produces the adjustable amplitude identical with system frequency and phase place with a voltage source inverter is added on the pressure regulation winding, the output voltage of transformer is the voltage vector addition that produces on the voltage that produces on the pressure regulation winding and main winding, thereby regulates the output voltage of transformer.
By voltage magnitude and the phase place of regulation voltage source inverter, amplitude and the phase place of the output voltage of adjusting transformer that can continuously smooth, the active power of also can continuously smooth regulating the output of transformer.
Regulate active power of output, voltage-phase and the amplitude of high-power transformer by the voltage source inverter of low capacity.To greatly improve the applicability of transformer for electrical network and output, reaching transformer has the purpose of carrying continuous voltage regulating.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the schematic vector diagram that the present invention changes voltage-phase.
Fig. 3 is the schematic vector diagram that the present invention changes voltage magnitude.
Fig. 4 is the schematic vector diagram that the present invention changes output voltage amplitude and phase place simultaneously.
In figure, Ua2: transformer A phase output voltage; Ub2: transformer B phase output voltage; Uc2: transformer C phase output voltage; Ua1:A phase main winding voltage; Ub1:B phase main winding voltage; Uc1:C phase main winding voltage; Ua:A phase pressure regulation winding voltage; Ub:B phase pressure regulation winding voltage; Uc:C phase pressure regulation winding voltage.
Embodiment
As Fig. 1, transformer 1 connects pressure regulation winding 2, pressure regulation winding 2 has output winding and the coupling winding that intercouples, the output winding connects the output of transformer 1, the coupling winding connects voltage source inverter 3, and one of voltage source inverter 3 output is identical with transformer 1 frequency, the component of voltage of suitable phase place and amplitude is coupled is added on the pressure regulation winding.Can the output voltage of transformer in time be responded and regulate according to instruction.Also can make as required pre-adjustment.
The present invention exports the vector addition that phase voltage equals transformer 1 main winding voltage and pressure regulation winding 2 voltages, one of the instruction output that voltage source inverter 3 provides according to computer controller 4 is identical with transformer frequencies, the voltage of suitable phase place and amplitude is coupled is added on pressure regulation winding 2, thereby regulate phase place and the amplitude of the output voltage of transformer 1, also can regulating system gain merit with idle.
Voltage source inverter 3 can adopt bridge rectifier to connect inverter and realize.
The computer controller 4 of three-phase regulating transformer is controlled voltage source inverter 3 according to demand, and computer controller 4 mainly comprises computer and be made of company's relay that computer is controlled, and its error of controlling amplitude and phase place is less than or equal to ± and 1%.
As shown in Figure 2, when phase shifting transformer only need to change transformer output voltage phase place, this mode only changed the phase place of output voltage, did not change the amplitude of output voltage.
Main winding voltage U a1, Ub1, Uc1 that the output voltage U a2 of transformer, Ub2, Uc2 equal transformer add pressure regulation winding voltage Ua, Ub, Uc, vector addition.
ⅠUa2Ⅰ=ⅠUa1Ⅰ；ⅠUb2Ⅰ=ⅠUb1Ⅰ；ⅠUc2Ⅰ=ⅠUc1Ⅰ。
As shown in Figure 3, this mode only changes the amplitude of output voltage, does not change the phase place of output voltage.Main winding voltage U a1, Ub1, Uc1 that the output voltage U a2 of transformer, Ub2, Uc2 equal transformer add pressure regulation winding voltage Ua, Ub, Uc, vector addition:
ⅠUa2Ⅰ=ⅠUa1Ⅰ±Ⅰ?UaⅠ；ⅠUb2Ⅰ=ⅠUb1Ⅰ±Ⅰ?UbⅠ；ⅠUc2Ⅰ=ⅠUc1Ⅰ±Ⅰ?UcⅠ。
In a lot of fields, as electricity generation grid-connecting, intelligent grid, polyphase equilibrium electricity consumption, poly phase rectification system etc., need to adjust simultaneously output voltage phase place and the amplitude of transformer.And can accomplish at any time the output voltage of transformer in time to be adjusted arbitrarily phase place and amplitude, as shown in Figure 4, this mode had both changed the amplitude of output voltage, changed again the phase place of output voltage.Main winding voltage U a1, Ub1, Uc1 that the output voltage U a2 of transformer, Ub2, Uc2 equal transformer add pressure regulation winding voltage Ua, Ub, Uc, vector addition:
Ua2=Ua1+?Ua；?Ub2=Ub1+?Ub；?Uc2=Uc1+?Uc。
The voltage-phase of 4 pairs of transformer main windings of computer controller judges, according to given instruction or host computer instruction, calculate phase place and the amplitude of required voltage Ua, Ub, Uc on the pressure regulation winding, voltage source inverter 3 is issued in instruction, and voltage source inverter 3 phase place and amplitude as requested exported coupled voltages Ua, Ub, Uc on the pressure regulation winding.
Claims (2)
1. a transformer regulating system, is characterized in that, comprises voltage source inverter, pressure regulation winding, computer controller; A side at transformer is set up the pressure regulation winding, and described pressure regulation winding comprises pressure regulation output winding and the pressure regulation coupling winding that intercouples, and described pressure regulation output winding connects the transformer output, and described pressure regulation coupling winding connects the voltage source inverter; Described computer controller connects respectively transformer input, transformer output and described pressure regulation output winding.
2. a kind of transformer regulating according to claim 1 system, is characterized in that, described voltage source inverter is that rectification circuit connects inverter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320302104 CN203278661U (en) | 2013-05-30 | 2013-05-30 | Voltage-adjusting system of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320302104 CN203278661U (en) | 2013-05-30 | 2013-05-30 | Voltage-adjusting system of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203278661U true CN203278661U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320302104 Expired - Fee Related CN203278661U (en) | 2013-05-30 | 2013-05-30 | Voltage-adjusting system of transformer |
Country Status (1)
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| CN (1) | CN203278661U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542970A (en) * | 2019-09-20 | 2021-03-23 | 中国石油化工股份有限公司 | Power supply control method, device and system and machine-readable storage medium |
-
2013
- 2013-05-30 CN CN 201320302104 patent/CN203278661U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542970A (en) * | 2019-09-20 | 2021-03-23 | 中国石油化工股份有限公司 | Power supply control method, device and system and machine-readable storage medium |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20150530 |
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| EXPY | Termination of patent right or utility model |