CN202550574U - Voltage regulator - Google Patents
Voltage regulator Download PDFInfo
- Publication number
- CN202550574U CN202550574U CN 201220129406 CN201220129406U CN202550574U CN 202550574 U CN202550574 U CN 202550574U CN 201220129406 CN201220129406 CN 201220129406 CN 201220129406 U CN201220129406 U CN 201220129406U CN 202550574 U CN202550574 U CN 202550574U
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- China
- Prior art keywords
- voltage regulator
- current controller
- current
- voltage
- side current
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Control Of Electrical Variables (AREA)
Abstract
The utility model discloses a voltage regulator which comprises a first voltage regulator, a rectification side current controller, a second voltage regulator and an inverter side current controller, wherein the first voltage regulator is installed on the rectification side of a power transmission line; the rectification side current controller is connected to the first voltage regulator, and the first voltage regulator controls current of the rectification side current controller; the second voltage regulator is installed on the inverter side of the power transmission line; and the inverter side current controller is connected to the second voltage regulator, and the second voltage regulator controls current of the inverter side current controller. The voltage regulator provided by the utility model acts to the rectification side and the inverter side at the same time and can restrict the lower limit value of the current of the rectification side and the upper limit value of the current of the inverter side at the same time through voltage regulation, thus effectively ensuring the stability of the direct-current power transmission line.
Description
Technical field
The utility model relates to the grid equipment field, relates in particular to a kind of voltage regulator.
Background technology
Many feed-ins direct current receives greatly to hold electrical network narrow and small in the region, and the zone that power consumption is big is come common approximately more.Many feed-ins direct current receives greatly to hold the electric network composition of electrical network tight, and electrical distance is nearer between the many times direct currents.If be prone to behind the fault in ac transmission system cause many times direct current simultaneous faultss, and the fault of many times direct currents and recovery process thereof will produce greater impact to AC system, the reciprocation between this alternating current-direct current is held the safe operation of electrical network to bring huge challenge.
For guaranteeing that many feed-ins direct current receives to hold the safe and stable operation of electrical network greatly, press for the stable operation mechanism that receives to hold electrical network to many feed-ins direct current greatly.
The utility model content
The utility model is intended to propose a kind of voltage regulator that is applicable to transmission line.
Embodiment according to the utility model proposes a kind of voltage regulator, comprises first voltage regulator, rectification side current controller, second voltage regulator and inversion side current controller.First voltage regulator is installed in the rectification side of transmission line.Rectification side current controller is connected to first voltage regulator, the electric current of first voltage regulator control rectification side current controller.Second voltage regulator is installed in the inversion side of transmission line.Inversion side current controller is connected to second voltage regulator, the electric current of second voltage regulator control inversion side current controller.
In one embodiment, first voltage regulator and second voltage regulator comprise pi controller.Higher limit under first voltage regulator restriction rectification side current controller.This higher limit is the minimum trigger angle output valve.
In one embodiment, the higher limit of second voltage regulator restriction inversion side current controller.This lower limit is maximum trigger angle output valve.
The voltage regulator of the utility model acts on rectification side and inversion side simultaneously, limits the lower current limit value of rectification side and the upper current limit value of inversion side simultaneously through voltage-regulation, can realize the stable of DC power transmission line effectively.
Description of drawings
Fig. 1 has disclosed the structural diagrams intention according to the voltage regulator of an embodiment of the utility model.
Fig. 2 has disclosed the VA characteristic curve according to the voltage regulator of an embodiment of the utility model.
Embodiment
With reference to shown in Figure 1, the utility model has disclosed a kind of voltage regulator, and this voltage regulator 100 comprises first voltage regulator 102, rectification side current controller 104, second voltage regulator 106 and inversion side current controller 108.
First voltage regulator 102 is installed in the rectification side of transmission line.Rectification side current controller 104 is connected to the electric current of first voltage regulator, 102, the first voltage regulators, 102 control rectification side current controllers 104.In one embodiment, first voltage regulator 102 comprises pi controller (PI controller).The lower limit of first voltage regulator, 102 restriction rectification side current controllers 104, in one embodiment, the lower limit of first voltage regulator, 102 restrictions is minimum trigger angle output valves.
Second voltage regulator 106 is installed in the inversion side of transmission line.Inversion side current controller 108 is connected to the electric current of second voltage regulator, 106, the second voltage regulators, 106 control inversion side current controllers 108.In one embodiment, second voltage regulator 106 comprises pi controller (PI controller).The higher limit of second voltage regulator, 106 restriction inversion side current controllers 108.In one embodiment, the higher limit of second voltage regulator, 108 restrictions is maximum trigger angle output valves.
The operation principle of the voltage regulator of the utility model is following:
DC power transmission line is decided current characteristics decision running current by rectifier when normal operation, decide γ by inverter
0Characteristic decision working voltage.For realizing such regulating characteristics, current controller is housed with control minimum trigger angle output valve α in the rectification side
0, or claim the lower limit trigger angle, current controller also is housed controlling maximum trigger angle output valve γ in the inversion side, or deserves to be called the limit trigger angle.
Except constant-current constant turn-offed the basic regulative mode in enough and to spare angle, direct current system can adopt again decided electric current and decides voltage (direct current) as basic regulative mode.Fig. 2 has disclosed and has adopted the VA characteristic curve of deciding electric current and deciding voltage (direct current) regulative mode, the i.e. VA characteristic curve of the voltage regulator of the utility model.Still by deciding Current Regulation, inverter then keeps certain mode to regulate by terminal (or top) voltage of DC line to rectifier in this regulative mode.Inverter side is equipped with the inverter side current controller to γ
0Regulate, but the inverter side current controller is mainly at γ＜γ
0Shi Jinhang regulates, and therefore this section voltage-current characteristic makes and dots in Fig. 2.Inverter side is decided the voltage-regulation mode and is applicable to and is held the occasion of big (weak pattern system) of equivalent (short circuit) impedance of AC system, helps improving the stability of current conversion station alternating voltage.When the voltage of inverter side ac bus descends; In order to keep direct voltage, the voltage regulator of inverter will automatically reduce the β angle, and the power factor of inverter is improved; The reactive power that consumes reduces, and helps preventing that alternating voltage from further descending or the vibration of damping voltage.And if the adjusting of enough and to spare angle is turn-offed in the inverter employing surely; Then when alternating voltage descended, it is constant with maintenance enough and to spare angle (extinguish angle) that it will increase the β angle, so the power factor of inverter descends; The reactive power that consumes increases; Cause alternating voltage further to descend, under certain condition, possibly form vicious circle, finally cause the alternating voltage collapse.
Another advantage that inverter side is decided voltage-regulation is, and is when underload (direct current is less than rated value) is moved, because the γ angle of inverter is big during than full-load run, more favourable to preventing commutation failure.
The voltage regulator of the utility model all has voltage regulator in rectification side and inversion side, i.e. first voltage regulator and second voltage regulator.Voltage regulator is a pi controller, and its output will be as the higher limit or the lower limit of current controller.In the inversion side, voltage regulator is as the higher limit of inversion side current controller, and the maximum trigger angle output with restriction inversion side current controller is controlled at direct voltage in the allowed band.In the rectification side, voltage regulator is as the lower limit of rectification side current controller, with the minimum trigger angle output of restriction rectification side current controller.
The voltage regulator of the utility model acts on rectification side and inversion side simultaneously, limits the lower current limit value of rectification side and the upper current limit value of inversion side simultaneously through voltage-regulation, can realize the stable of DC power transmission line effectively.
Claims (6)
1. a voltage regulator is characterized in that, comprising:
First voltage regulator, first voltage regulator are installed in the rectification side of transmission line;
Rectification side current controller is connected to first voltage regulator, the electric current of first voltage regulator control rectification side current controller;
Second voltage regulator, second voltage regulator are installed in the inversion side of transmission line;
Inversion side current controller is connected to second voltage regulator, the electric current of second voltage regulator control inversion side current controller.
2. voltage regulator as claimed in claim 1 is characterized in that, said first voltage regulator and second voltage regulator comprise pi controller.
3. voltage regulator as claimed in claim 2 is characterized in that, the lower limit of first voltage regulator restriction rectification side current controller.
4. voltage regulator as claimed in claim 3 is characterized in that, the minimum trigger angle output valve of first voltage regulator restriction rectification side current controller.
5. voltage regulator as claimed in claim 2 is characterized in that, the higher limit of second voltage regulator restriction inversion side current controller.
6. voltage regulator as claimed in claim 5 is characterized in that, the maximum trigger angle output valve of second voltage regulator restriction inversion side current controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220129406 CN202550574U (en) | 2012-03-30 | 2012-03-30 | Voltage regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220129406 CN202550574U (en) | 2012-03-30 | 2012-03-30 | Voltage regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202550574U true CN202550574U (en) | 2012-11-21 |
Family
ID=47171143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220129406 Expired - Lifetime CN202550574U (en) | 2012-03-30 | 2012-03-30 | Voltage regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202550574U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767215B (en) * | 2015-03-30 | 2017-10-03 | 深圳供电局有限公司 | A kind of multi-functional DVR and its method for dynamic regulation control |
-
2012
- 2012-03-30 CN CN 201220129406 patent/CN202550574U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767215B (en) * | 2015-03-30 | 2017-10-03 | 深圳供电局有限公司 | A kind of multi-functional DVR and its method for dynamic regulation control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121121 |