CN204835537U - On -load voltage -regulating transformer's pressure regulating controlling means - Google Patents
On -load voltage -regulating transformer's pressure regulating controlling means Download PDFInfo
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- CN204835537U CN204835537U CN201520543334.3U CN201520543334U CN204835537U CN 204835537 U CN204835537 U CN 204835537U CN 201520543334 U CN201520543334 U CN 201520543334U CN 204835537 U CN204835537 U CN 204835537U
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 8
- 230000001276 controlling effect Effects 0.000 title abstract 3
- 230000006978 adaptation Effects 0.000 claims abstract description 14
- 230000005611 electricity Effects 0.000 claims abstract description 4
- 230000009466 transformation Effects 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000000052 comparative effect Effects 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000010891 electric arc Methods 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000003464 cuspid Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 238000001914 filtration Methods 0.000 description 1
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Abstract
The utility model discloses an on -load voltage -regulating transformer's pressure regulating controlling means, include: on -load voltage -regulating transformer for insert the outside communication electricity, grid voltage to external load is joined in marriage in output after the vary voltage, the pressure regulating controlling means include: power adaptation module, microcontroller, voltage sample module, the variable voltage electric drive device includes: step motor, gear units, rack, power adaptation module inserts external power source for change external power source's voltage, provide the power, the voltage sample module inserts joins in marriage grid voltage for join in marriage grid voltage to this and sample, generate sampled signal and send to microcontroller, microcontroller connects step motor for receive sampled signal, the control stepper motor rotates, step motor makes gear units rotate through rotating, the rack meshes with gear units mutually, makes rack linear motion by gear units's rotation, fixedly on the rack setting up adjustable transformer tap, can remove along with the rack, adjusts on -load voltage -regulating transformer's transformation ratio.
Description
Technical field
The utility model relates to Electric control field, espespecially a kind of Regulation Control device of on-load tap-changing transformer.
Background technology
In the electrical network of China, variation is excessive becomes ubiquitous problem, and this not only drastically influence transmission facility, the safe operation of facility, also shortens the effective and reasonable utilization of useful life and China's electric energy.
When variation is excessive, the Quality and yield of industrial and agricultural products will be affected, damage equipment, even cause systematic " voltage collapse ", cause large-area power-cuts.Utilize the tap changing on-load tap-changing transformer to carry out pressure regulation is a kind of effective adjusting pressure measure in idle abundant electric power system.On-load tap-changing transformer can under the condition of on-load, and switching branch joint reaches pressure regulation object manually or automatically.
At present, on-load tap-changing transformer adopts the pressure regulation of mechanical type shunting switch, and use semiconductor logic circuit, this voltage regulating mode at least exists following defect: (1) is easily by the electromagnetic environmental impact of transformer station's complexity, performance is stable not, works reliable not; (2) extra analog to digital converter is needed.(3) adopt mechanical type voltage-regulation tap changer, can produce electric arc, responsiveness slow, safeguard that inconvenience, failure rate are high.(4) only have fixing several taps, stepless level and smooth pressure regulation can not be realized.(5) distribution network voltage can not automatically be maintained constant.
Utility model content
The defect that the utility model exists to overcome above-mentioned mechanical type shunting switch pressure regulation, proposes a kind of Regulation Control device of on-load tap-changing transformer.This system can avoid the electric arc produced due to mechanical switch switching, and pressure regulation speed is fast, controls accurately.
For achieving the above object, the utility model proposes a kind of Regulation Control device of on-load tap-changing transformer, comprising: on-load tap-changing transformer, Regulation Control device, pressure regulation transmission device; Wherein, described on-load tap-changing transformer, comprises an adjustable load tap changer, and for accessing external communication electricity, after transformation, output distribution net voltage is to external loading; Described Regulation Control device comprises: power adaptation module, microcontroller, voltage sample module; Described pressure regulation transmission device comprises: stepping motor, geared system, tooth bar; Described power adaptation module, access external power source, for being changed by the voltage of described external power source, provides power supply to described microcontroller, voltage sample module, stepping motor; Described voltage sample module, accesses described distribution network voltage, for sampling to this distribution network voltage, generating sampled signal and being sent to described microcontroller; Described microcontroller, connecting stepping motor, for receiving described sampled signal, comparing this distribution network voltage and a magnitude of voltage set, and controls described stepping motor rotate according to comparative result; Described stepping motor makes described geared system rotate by rotation; Described rack and pinion device is meshed, by the rotation of described geared system, this rack linear is moved, this tooth bar is fixedly installed described adjustable load tap changer, this adjustable load tap changer moves along with tooth bar, regulates the no-load voltage ratio of described on-load tap-changing transformer.
Further, the Regulation Control device of described on-load tap-changing transformer also comprises: be connected to the display module of described microcontroller, communication module, command reception module; Described display module, for the positional information of the information and described adjustable load tap changer that show described distribution network voltage, wherein, the information of described distribution network voltage is generated according to described sampled signal by described microcontroller, and the positional information of described adjustable load tap changer is generated according to the rotation situation of described stepping motor by described microcontroller; Described communication module, for sending warning signal, wherein, described warning signal is when microcontroller cannot pass through to regulate described adjustable load tap changer maintenance distribution network voltage in normal range (NR), generated by microcontroller, take other regulation measure to remind staff; Described command reception module, for receiving the control command of outside input, and being sent to described microcontroller, regulating the no-load voltage ratio of described on-load tap-changing transformer.
Further, described power adaptation module comprises: AC/DC module and DC/DC module; Described external power source is converted to 24V direct voltage by described AC/DC module, for providing power supply to stepping motor; Described 24V direct voltage is converted to 3.3V direct voltage by described DC/DC module, provides power supply for giving described microcontroller, voltage sample module, communication module, command reception module.
Further, the external power source of described power adaptation module access is the distribution network voltage that described on-load tap-changing transformer exports.
Further, what described microcontroller adopted is MSP430f149 single-chip microcomputer, comprising: AD conversion unit, serial communication unit, I/O input-output unit; Wherein, AD conversion unit connects described voltage sample module, and conversion accuracy reaches 12,1 DNL, 1 integral nonlinearity; Described serial communication unit connects described communication module; Described I/O input-output unit connects described stepping motor, display module, command reception module.
Further, described voltage sample module is made up of voltage transformer, the first resistance, PI type filter circuit, voltage lifting circuit, voltage follower device, single order RC filter circuit; Wherein, described voltage transformer accesses described distribution network voltage; Described PI type filter circuit is made up of inductance, the first electric capacity, the second electric capacity; Described voltage lifting circuit is made up of the second resistance, the 3rd resistance and 3.3V DC power supply; Described voltage follower device comprises an amplifier, and the inverting input of this amplifier is connected with output; Described single order RC filter circuit is made up of the 4th resistance, the 3rd electric capacity.
Further, described geared system comprises multiple fixing with one heart and the gear varied in size, described tooth bar and one of them gears meshing.
By the Regulation Control device of on-load tap-changing transformer that the utility model proposes, the electric arc produced due to mechanical switch switching can be avoided, and pressure regulation speed is fast, controls accurately, reliable, achieve that automatically to maintain distribution network voltage constant; And regulate tap by transmission device, achieve stepless level and smooth pressure regulation.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms a application's part, does not form restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the Regulation Control apparatus structure schematic diagram of the on-load tap-changing transformer of the utility model one embodiment.
Fig. 2 is the Regulation Control device of the utility model one embodiment and the structural representation of pressure regulation transmission device.
Fig. 3 is the relation schematic diagram of the geared system of the utility model one embodiment, tooth bar and adjustable load tap changer.
Fig. 4 is the model calling relation schematic diagram of the Regulation Control device of the utility model one embodiment.
Fig. 5 is the structural representation of the voltage sample module of the utility model one embodiment.
Embodiment
Below coordinating diagram and preferred embodiment of the present utility model, setting forth the technological means that the utility model is taked for reaching predetermined utility model object further.
Fig. 1 is the Regulation Control apparatus structure schematic diagram of the on-load tap-changing transformer of the utility model one embodiment.As shown in Figure 1, this system comprises: on-load tap-changing transformer 1, Regulation Control device 2, pressure regulation transmission device 3.
On-load tap-changing transformer 1, comprises an adjustable load tap changer, for accessing external communication electricity 4, and output distribution net voltage 5 to external loading 6 after transformation.
Further illustrate below in conjunction with Fig. 2 and Fig. 3, Fig. 2 is the Regulation Control device of the utility model one embodiment and the structural representation of pressure regulation transmission device; Fig. 3 is the relation schematic diagram of the geared system of the utility model one embodiment, tooth bar and adjustable load tap changer.
Wherein, as shown in Figure 2, Regulation Control device 2 comprises: power adaptation module 21, voltage sample module 22, microcontroller 23.
Pressure regulation transmission device 3 comprises: stepping motor 31, geared system 32, tooth bar 33.
Power adaptation module 21, access external power source, for being changed by the voltage of external power source, provides power supply to voltage sample module 22, microcontroller 23, stepping motor 31; The external power source that power adaptation module 21 accesses can be the distribution network voltage 5 that on-load tap-changing transformer 1 exports.
Voltage sample module 22, access distribution network voltage 5, for sampling to this distribution network voltage 5, generating sampled signal and being sent to microcontroller 23.
Microcontroller 23, connects stepping motor 31, for receiving sampled signal, comparing, rotate according to comparative result control step motor 31 distribution network voltage 5 and a magnitude of voltage set;
Stepping motor 31 makes geared system 32 rotate by rotation.
Shown in Fig. 3, tooth bar 33 is meshed with geared system 32, this tooth bar 33 rectilinear motion is made (such as by the rotation of geared system 32, tooth bar 33 is moved up and down), this tooth bar 33 is fixedly installed adjustable load tap changer 7, this adjustable load tap changer 7 moves along with tooth bar 33, regulates the no-load voltage ratio of on-load tap-changing transformer 1.
In the present embodiment, geared system 32 can comprise multiple fixing with one heart and the gear varied in size (pinion 321 such as shown in Fig. 3, gear wheel 322), and tooth bar 33 keeps engaging with one of them gear (being pinion 321 shown in Fig. 3).Two kinds of simultaneous reasons of gear select degree of regulation or speed for staff: pinion is meshed with tooth bar, and regulating can be more accurate, but governing speed is slower; And canine tooth wheel and rack is meshed, then have reverse effect.By the mode of this tooth bar meshing gear, the circular motion of stepping motor 31 can be changed into the rectilinear motion of tooth bar 33; When stepping motor 31 forward or reverse, adjustable load tap changer 7 can move up and down along with tooth bar 33, thus changes on-load tap-changing transformer 1 no-load voltage ratio.
This system can also comprise a motor drive module (not shown), this module can be arranged between stepping motor 31 and microcontroller 23 or be integrated in stepping motor 31, for the turn signal sent according to microcontroller, control step motor 31 rotates.
In the present embodiment, comparative result comprises:
When distribution network voltage 5 is less than the magnitude of voltage of setting, microcontroller 23 control step motor 31 rotates forward, the rotating shaft that this stepping motor 31 rotates forward driven gear device 32 rotates forward (A direction as shown in Figure 3, clockwise direction), this geared system 32 makes tooth bar 33 move (as shown in Figure 3 along first direction, move up), this tooth bar 33 drives adjustable load tap changer 7 to move (moving up) towards first direction, increase the no-load voltage ratio of on-load tap-changing transformer 1, increase distribution network voltage 5.
When distribution network voltage 5 is greater than the magnitude of voltage of setting, microcontroller 23 control step motor 31 reverses, this stepping motor 31 reverses rotating shaft reverse rotation (the B direction as shown in Figure 3 of driven gear device 32, counterclockwise), this geared system 32 makes tooth bar 33 move (as shown in Figure 3 along second direction, move down), this tooth bar 33 drives adjustable load tap changer 7 to move (moving down) towards second direction, reduce the no-load voltage ratio of on-load tap-changing transformer 1, reduce distribution network voltage 5.
In the present embodiment, Fig. 4 is the model calling relation schematic diagram of the Regulation Control device of the utility model one embodiment.As shown in Figure 4, this system also comprises: be connected to the display module 8 of microcontroller 23, communication module 9, command reception module 10.
Display module 8, for the positional information of the information and adjustable load tap changer 9 that show distribution network voltage 5, wherein, the information of distribution network voltage 5 is generated according to sampled signal by microcontroller 23, and the positional information of adjustable load tap changer 9 is generated according to the rotation situation of stepping motor 31 by microcontroller 23.
Communication module 9, for sending warning signal, wherein, warning signal be when microcontroller 23 cannot by regulate adjustable load tap changer 9 maintain distribution network voltage 5 in normal range (NR) time, generated by microcontroller 23, to remind staff to take other regulation measure, achieve remote operation.
Command reception module 10, for receiving the control command of outside input, and being sent to microcontroller 23, regulating the no-load voltage ratio of on-load tap-changing transformer 1.Staff can pass through the manual input control order of keyboard, regulates no-load voltage ratio.
Above-mentioned functions module can realize remote-operated function, and the function of manually input pressure regulation instruction, shows the function of the information such as current tap joint position, distribution network voltage.
Again shown in composition graphs 4, this microcontroller 23 can adopt MSP430f149 single-chip microcomputer, comprising: AD conversion unit 231, serial communication unit 232, I/O input-output unit 233.
Wherein, AD conversion unit 231 connects voltage sample module 22, and conversion accuracy reaches 12,1 DNL, 1 integral nonlinearity.
Serial communication unit 232 connects communication module 9.
I/O input-output unit 233 connects stepping motor 31 (also can connect motor control module), display module 8, command reception module 10.
Major control program is written with MSP430f149 digital microcontroller, by the interference of external electromagnetic environment, and can not control accurately, reliably.
In the present embodiment, power adaptation module 21 comprises: AC/DC module and DC/DC module (not shown);
External power source (external power source can be distribution network voltage 5) is converted to 24V direct voltage by AC/DC module, provides power supply for giving stepping motor 31.
24V direct voltage is converted to 3.3V direct voltage by DC/DC module, provides power supply for giving microcontroller 23, voltage sample module 22, communication module 9, command reception module 10 etc.
In the present embodiment, Fig. 5 is the structural representation of the voltage sample module of the utility model one embodiment.As shown in Figure 5, this voltage sample module is made up of voltage transformer T1, first resistance R1, PI type filter circuit 221, voltage lifting circuit 222, voltage follower device 223, single order RC filter circuit 224.
Wherein, voltage transformer T1 accesses distribution network voltage 5.
PI type filter circuit 221 is made up of inductance L 1, first electric capacity C1, the second electric capacity C2; Containing harmonic wave in line voltage, voltage transformer T1 also can produce harmonic wave due to magnetic hysteresis, magnetic saturation, and PI type filter circuit 221 is this two parts harmonic wave of filtering mainly.
Voltage lifting circuit 222 is made up of the second resistance R2, the 3rd resistance R3 and 3.3V DC power supply VDD; Because the voltage inputting microcontroller can not be less than 0, so need voltage lifting circuit 222 to be raised to by the voltage being less than 0 be greater than 0.
Voltage follower device 223 comprises an amplifier U1, the inverting input of this amplifier U1 is connected with output, namely constitute this voltage follower device 223, the Main Function of voltage follower 223 makes input impedance become large, reduces microcontroller circuit to the impact of sample circuit.
Single order RC filter circuit 224 is made up of the 4th resistance R4, the 3rd electric capacity C3.
What the utility model was mainly protected is a kind of Regulation Control device; improve the mechanical structure between being mainly by multiple hardwares or the no-load voltage ratio of annexation to transformer regulates, the program is only shape to hardware, structure, relation change.Wherein, the common function magnitude of voltage of distribution network voltage and setting being compared to just microcontroller self realized, relatively, regulable control stepping motor rotates the application having same or similar function in existing step motor control technology, is not improvement of the present utility model herein.
In order to more clearly explain the Regulation Control device of above-mentioned on-load tap-changing transformer, be described below in conjunction with a specific embodiment, but it should be noted that this embodiment is only to better the utility model is described, do not form and the utility model is limited improperly.
First, after voltage sample module is sampled to distribution network voltage, sampled signal is sent in microcontroller MSP430f149 and analyzes, and compare with the magnitude of voltage of setting.When judging that distribution network voltage changes, microcontroller can send signal to display module, the information of the distribution network voltage in change display screen.
When distribution network voltage is less than the magnitude of voltage of setting, microcontroller will send to motor drive module the signal that stepping motor is rotated forward, stepping motor rotates forward driven gear and rotates forward, gear driven tooth bar moves, rack drives load tap changer moves, thus increase transformer voltage ratio, increase distribution network voltage.
When distribution network voltage is greater than the magnitude of voltage of setting, microcontroller will send to motor drive module the signal that stepping motor is reversed, the counter-rotating of stepping motor reversion driven gear, gear driven tooth bar moves down, rack drives load tap changer moves down, thus reduction transformer voltage ratio, reduce distribution network voltage.
When due to power system reactive power deficiency, transformer voltage ratio is transferred to the maximum or minimum distribution network voltage that can not maintain in normal range (NR), then microcontroller can stop sending signal to motor drive module, and to the alert anxious signal of display module display, by communication module, the staff to night shift room gives the alarm, and need take other regulation measure to remind staff.When control object be no longer distribution network voltage constant time, such as the purpose of the trend of control system, the adjustment of that transformer voltage ratio may be no longer just main means, but a kind of supplementary means, now just can be inputted the value of a rational transformer voltage ratio by Keysheet module to microcontroller, coordinate other control devices.
By the Regulation Control device of on-load tap-changing transformer that the utility model proposes, the electric arc produced due to mechanical switch switching can be avoided, and pressure regulation speed is fast, controls accurately, reliable, achieve that automatically to maintain distribution network voltage constant; And regulate tap by transmission device, achieve stepless level and smooth pressure regulation.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiment of the utility model; and be not used in restriction protection range of the present utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (7)
1. a Regulation Control device for on-load tap-changing transformer, is characterized in that, comprising: on-load tap-changing transformer, Regulation Control device, pressure regulation transmission device; Wherein,
Described on-load tap-changing transformer, comprises an adjustable load tap changer, and for accessing external communication electricity, after transformation, output distribution net voltage is to external loading;
Described Regulation Control device comprises: power adaptation module, microcontroller, voltage sample module;
Described pressure regulation transmission device comprises: stepping motor, geared system, tooth bar;
Described power adaptation module, access external power source, for being changed by the voltage of described external power source, provides power supply to described microcontroller, voltage sample module, stepping motor;
Described voltage sample module, accesses described distribution network voltage, for sampling to this distribution network voltage, generating sampled signal and being sent to described microcontroller;
Described microcontroller, connecting stepping motor, for receiving described sampled signal, comparing this distribution network voltage and a magnitude of voltage set, and controls described stepping motor rotate according to comparative result;
Described stepping motor makes described geared system rotate by rotation;
Described rack and pinion device is meshed, by the rotation of described geared system, this rack linear is moved, this tooth bar is fixedly installed described adjustable load tap changer, this adjustable load tap changer moves along with tooth bar, regulates the no-load voltage ratio of described on-load tap-changing transformer.
2. the Regulation Control device of on-load tap-changing transformer as claimed in claim 1, it is characterized in that, the Regulation Control device of described on-load tap-changing transformer also comprises: be connected to the display module of described microcontroller, communication module, command reception module;
Described display module, for the positional information of the information and described adjustable load tap changer that show described distribution network voltage, wherein, the information of described distribution network voltage is generated according to described sampled signal by described microcontroller, and the positional information of described adjustable load tap changer is generated according to the rotation situation of described stepping motor by described microcontroller;
Described communication module, for sending warning signal, wherein, described warning signal is when microcontroller cannot pass through to regulate described adjustable load tap changer maintenance distribution network voltage in normal range (NR), generated by microcontroller, take other regulation measure to remind staff;
Described command reception module, for receiving the control command of outside input, and being sent to described microcontroller, regulating the no-load voltage ratio of described on-load tap-changing transformer.
3. the Regulation Control device of on-load tap-changing transformer as claimed in claim 2, it is characterized in that, described power adaptation module comprises: AC/DC module and DC/DC module;
Described external power source is converted to 24V direct voltage by described AC/DC module, for providing power supply to stepping motor;
Described 24V direct voltage is converted to 3.3V direct voltage by described DC/DC module, provides power supply for giving described microcontroller, voltage sample module, communication module, command reception module.
4. the Regulation Control device of on-load tap-changing transformer as claimed in claim 3, is characterized in that, the external power source of described power adaptation module access is the distribution network voltage that described on-load tap-changing transformer exports.
5. the Regulation Control device of on-load tap-changing transformer as claimed in claim 4, is characterized in that, what described microcontroller adopted is MSP430f149 single-chip microcomputer, comprising: AD conversion unit, serial communication unit, I/O input-output unit; Wherein,
AD conversion unit connects described voltage sample module, and conversion accuracy reaches 12,1 DNL, 1 integral nonlinearity;
Described serial communication unit connects described communication module;
Described I/O input-output unit connects described stepping motor, display module, command reception module.
6. the Regulation Control device of on-load tap-changing transformer as claimed in claim 1, it is characterized in that, described voltage sample module is made up of voltage transformer, the first resistance, PI type filter circuit, voltage lifting circuit, voltage follower device, single order RC filter circuit; Wherein,
Described voltage transformer accesses described distribution network voltage;
Described PI type filter circuit is made up of inductance, the first electric capacity, the second electric capacity;
Described voltage lifting circuit is made up of the second resistance, the 3rd resistance and 3.3V DC power supply;
Described voltage follower device comprises an amplifier, and the inverting input of this amplifier is connected with output;
Described single order RC filter circuit is made up of the 4th resistance, the 3rd electric capacity.
7. the Regulation Control device of on-load tap-changing transformer as claimed in claim 1, is characterized in that, described geared system comprises multiple fixing with one heart and the gear varied in size, described tooth bar and one of them gears meshing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520543334.3U CN204835537U (en) | 2015-07-24 | 2015-07-24 | On -load voltage -regulating transformer's pressure regulating controlling means |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520543334.3U CN204835537U (en) | 2015-07-24 | 2015-07-24 | On -load voltage -regulating transformer's pressure regulating controlling means |
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| CN204835537U true CN204835537U (en) | 2015-12-02 |
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| CN201520543334.3U Withdrawn - After Issue CN204835537U (en) | 2015-07-24 | 2015-07-24 | On -load voltage -regulating transformer's pressure regulating controlling means |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993488A (en) * | 2015-07-24 | 2015-10-21 | 国家电网公司 | Voltage regulating control device for on-load tap changer |
-
2015
- 2015-07-24 CN CN201520543334.3U patent/CN204835537U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993488A (en) * | 2015-07-24 | 2015-10-21 | 国家电网公司 | Voltage regulating control device for on-load tap changer |
| CN104993488B (en) * | 2015-07-24 | 2017-06-06 | 国家电网公司 | The Regulation Control device of ULTC |
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Granted publication date: 20151202 Effective date of abandoning: 20170606 |