CN102386826A - Self-shunt excitation system based on energy storage type dynamic voltage restorer - Google Patents
Self-shunt excitation system based on energy storage type dynamic voltage restorer Download PDFInfo
- Publication number
- CN102386826A CN102386826A CN2011103351148A CN201110335114A CN102386826A CN 102386826 A CN102386826 A CN 102386826A CN 2011103351148 A CN2011103351148 A CN 2011103351148A CN 201110335114 A CN201110335114 A CN 201110335114A CN 102386826 A CN102386826 A CN 102386826A
- Authority
- CN
- China
- Prior art keywords
- excitation
- energy storage
- type dynamic
- self
- dynamic voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The invention discloses a self-shunt excitation system based on an energy storage type dynamic voltage restorer. The conventional self-shunt excitation system is improved in a way that the energy storage type dynamic voltage restorer is arranged between the secondary side of an excitation transformer and the input end of a rectifier bridge, wherein the energy storage type dynamic voltage restorer is formed by sequentially connecting a dynamic voltage restorer, a two-way direct current/direct current converter and a direct current energy storage system. By the self-shunt excitation system, when the terminal voltage of a generator is greatly reduced due to the conditions of short-circuit faults, ultra low frequency oscillation or the like of a power system, rapid compensation is performed to keep excitation voltage constant or at a given value, ensure enough excitation capability and improve the transient state stability of the power system; and in normal running and the ultra low frequency oscillation, positive damping is provided by proper control to improve the stability of the power system.
Description
Technical field
The invention belongs to the generator excitation technical field, be specifically related to a kind of self-shunt excitation system based on the accumulation energy type dynamic electric voltage recovery device.
Background technology
The safe and stable operation of electric power system is significant to national economy.Long-term facts have proved, excitation control has become the stable important means of comprehensive raising system safety, and the excitation system of characteristic good can effectively guarantee quality of voltage, improves power system operation stability.Along with the increase of generator single-machine capacity and scale of power, generating set and electric power system are controlled at aspects such as reliability and dynamic quality and have proposed increasingly high requirement to excitation.The synchronous generator self-shunt excitation system is because self advantage has become the main excitation mode of preferentially choosing both at home and abroad.
In the short-circuit fault of power system process, voltage seriously descends, and the motor reactive current strengthens in the system, and busbar voltage is further descended, and causes voltage collapse or long period voltage not to recover.During electrical network generation low frequency/ultra-low frequency oscillation, generator terminal voltage also will be low along with significantly, and this moment, set end voltage possibly continue to be in reduced levels the long period (a few second), especially was in the unit of oscillation center.Under above-mentioned several kinds of situation, for the system stable operation excitation system more needs forced exciting or strengthens excitation, but because the power supply of self-shunt excitation system is taken from the machine end, supply voltage reduces, and has influenced the ability of encouraging by force.
Summary of the invention
It is not enough to the objective of the invention is to overcome conventional self-shunt excitation system; Propose a kind of self-shunt excitation system based on the accumulation energy type dynamic electric voltage recovery device, this excitation system is when the ultra-low frequency oscillation that electric power system fault or system generation power system stabilizer, PSS (PSS) can't suppress, and to keep exciting voltage be constant or remain on set-point; Assurance provides enough excitation abilities; And can suppress low-frequency oscillation through regulating active power and reactive power, improve the static stability of system.
A kind of self-shunt excitation system based on the accumulation energy type dynamic electric voltage recovery device; Comprise excitation transformer, field rectifier, generator measurement device, field regulator, magnet exciting coil and excitation unit; The former limit of excitation transformer connects the outlet of generator, and secondary connects the AC side of field rectifier, and the DC side of field rectifier connects magnet exciting coil; The control end of field rectifier connects the output of field regulator; The input of field regulator connects the generator measurement device, and excitation unit connects magnet exciting coil, it is characterized in that; Between the input of the secondary of excitation transformer and rectifier bridge, set up the accumulation energy type dynamic electric voltage recovery device, the accumulation energy type dynamic electric voltage recovery device comprises dynamic electric voltage recovery device, bidirectional, dc/DC converter and the dc energy storage system that order is joined.
The present invention has following technique effect:
(1) the present invention is in application; At set end voltage generation voltage dip or when rising sharply; Dynamic electric voltage recovery device can inject an amplitude, the controlled series compensation voltage of phase place in excitation system in several milliseconds; Voltage is effectively compensated, constant to guarantee exciting voltage, thus it is constant to realize keeping set end voltage.Compensating required meritorious and reactive power is provided by energy-storage system.
(2) the present invention is in application; This excitation system provides the passage of system damping to have 3; Passage 1: identical with conventional excitation, the voltage in the real-time monitoring system, electric current, size such as meritorious and idle provide positive damping through the size of regulating the DC excitation electric current during system disturbance; Passage 2: the reactive power of excitation system AC side injection generator machine end is controlled within the specific limits, and promptly excitation system can be carried out the absorption and the release of reactive power to generator end, through suitable control positive damping can be provided; Passage 3: the active power of excitation system AC side injection generator machine end is controlled within the specific limits, and promptly excitation system can be carried out the absorption and the release of active power to generator end, through suitable control positive damping can be provided.Back 2 channel response speed fast (ms level) by this system provides are improving system damping, are suppressing to be superior to conventional excitation system aspect the low-frequency oscillation.
Do not receive the influence of set end voltage when (3) the present invention is owing to operation, can realize being similar to the effect of separate excitation, but be superior to the separate excitation system aspect reliability and the economy again.
Description of drawings
Fig. 1 is a local circuit structural representation of the present invention;
Fig. 2 is the dynamic electric voltage recovery device structural representation of instance;
Fig. 3 is the bidirectional, dc/DC transfer circuit structural representation of instance;
Fig. 4 is the bank of super capacitors structural representation of instance.
Embodiment
Below in conjunction with accompanying drawing and instance to further explain of the present invention.
Conventional self-shunt excitation system comprises excitation transformer T, field rectifier, generator measurement device, field regulator, magnet exciting coil and excitation unit; The former limit of excitation transformer connects the outlet of generator G; Secondary connects the AC side of field rectifier, and the DC side of field rectifier connects magnet exciting coil, and the control end of field rectifier connects the output of field regulator; The input of field regulator connects the generator measurement device, and excitation unit connects magnet exciting coil.
The present invention improves above-mentioned conventional self-shunt excitation system, between the input of the secondary of excitation transformer and rectifier bridge, has set up the accumulation energy type dynamic electric voltage recovery device.With reference to figure 1, the accumulation energy type dynamic electric voltage recovery device comprises dynamic electric voltage recovery device 1, bidirectional, dc/DC converter 2 and the dc energy storage system 3 that order is joined.The concrete realization of dynamic electric voltage recovery device has multiple mode; Fig. 2 has provided wherein a kind of particular circuit configurations; The secondary of compensator transformer links to each other with rectifier bridge through filter, and the former limit ab of compensator transformer is connected between excitation transformer secondary and the field rectifier AC side.Fig. 3 has provided the particular circuit configurations of bidirectional, dc/DC converter, and a DC port cd links to each other with the DC port of dynamic electric voltage recovery device, and another DC port ef links to each other with the dc energy storage system.The dc energy storage system adopts any one in battery, bank of super capacitors, superconducting magnetic energy storage system, energy accumulation device for fly wheel and the polynary mixed energy storage system; Fig. 4 has provided the circuit diagram of bank of super capacitors; Normal storing electricity is set to the half the of active volume in the bank of super capacitors, and maximum chargeable, discharge capacity is equated.
Operation principle of the present invention is: when situation such as electric power system failed because or ultra-low frequency oscillation caused generator terminal voltage to decline to a great extent, the accumulation energy type dynamic electric voltage recovery device compensated fast, kept exciting voltage constant or maintain set-point; When normal operation and ultra-low frequency oscillation, excitation system is carried out the absorption or the release of active power and reactive power to generator end.
Embodiment during electric current 400A, can keep the stable time of exciting voltage to be not less than encouraging the time by force of 20s or excitation rules regulation at exciting voltage 200V during system short-circuit.
Claims (1)
1. self-shunt excitation system based on the accumulation energy type dynamic electric voltage recovery device; Comprise excitation transformer, field rectifier, generator measurement device, field regulator, magnet exciting coil and excitation unit; The former limit of excitation transformer connects the outlet of generator, and secondary connects the AC side of field rectifier, and the DC side of field rectifier connects magnet exciting coil; The control end of field rectifier connects the output of field regulator; The input of field regulator connects the generator measurement device, and excitation unit connects magnet exciting coil, it is characterized in that; Between the input of the secondary of excitation transformer and rectifier bridge, set up the accumulation energy type dynamic electric voltage recovery device, the accumulation energy type dynamic electric voltage recovery device comprises dynamic electric voltage recovery device, bidirectional, dc/DC converter and the dc energy storage system that order is joined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103351148A CN102386826A (en) | 2011-10-28 | 2011-10-28 | Self-shunt excitation system based on energy storage type dynamic voltage restorer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103351148A CN102386826A (en) | 2011-10-28 | 2011-10-28 | Self-shunt excitation system based on energy storage type dynamic voltage restorer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102386826A true CN102386826A (en) | 2012-03-21 |
Family
ID=45825886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103351148A Pending CN102386826A (en) | 2011-10-28 | 2011-10-28 | Self-shunt excitation system based on energy storage type dynamic voltage restorer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102386826A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023410A (en) * | 2012-12-21 | 2013-04-03 | 重庆磐达机械有限公司 | Double-excitation system for air-cooled generator set |
| CN104201698A (en) * | 2014-09-05 | 2014-12-10 | 广东电网公司佛山供电局 | System and method for controlling dynamic stability of DC bus voltage based on dual-PWM energy accumulating current transformer |
| CN106505591A (en) * | 2016-12-15 | 2017-03-15 | 清华大学 | A kind of multi-machine power system ultra-low frequency oscillation analysis method |
| CN108808698A (en) * | 2018-05-08 | 2018-11-13 | 全球能源互联网研究院有限公司 | Distributed sub-synchronous oscillation restraining device based on energy storage and new energy transmission system |
| CN113315153A (en) * | 2021-05-31 | 2021-08-27 | 广东电网有限责任公司广州供电局 | System, method and device for improving tolerance capability of auxiliary frequency converter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1312715A1 (en) * | 1985-10-21 | 1987-05-23 | Днепродзержинский Индустриальный Институт Им.М.И.Арсеничева | Device for controlling excitation of synchronous machine |
| WO1999053606A1 (en) * | 1998-04-09 | 1999-10-21 | Mitsubishi Denki Kabushiki Kaisha | Exciter for generator |
| EP0878050B1 (en) * | 1995-02-01 | 2003-07-23 | Fieldbus International A/S | Ac/dc converter |
| WO2006045703A1 (en) * | 2004-10-28 | 2006-05-04 | Alstom Technology Ltd | Static energising system for a generator and method for operation of such an energising system |
| CN102013866A (en) * | 2009-09-07 | 2011-04-13 | 阿尔斯托姆科技有限公司 | Static exciter of an electric generator, method for retrofitting and method for operating the same |
-
2011
- 2011-10-28 CN CN2011103351148A patent/CN102386826A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1312715A1 (en) * | 1985-10-21 | 1987-05-23 | Днепродзержинский Индустриальный Институт Им.М.И.Арсеничева | Device for controlling excitation of synchronous machine |
| EP0878050B1 (en) * | 1995-02-01 | 2003-07-23 | Fieldbus International A/S | Ac/dc converter |
| WO1999053606A1 (en) * | 1998-04-09 | 1999-10-21 | Mitsubishi Denki Kabushiki Kaisha | Exciter for generator |
| WO2006045703A1 (en) * | 2004-10-28 | 2006-05-04 | Alstom Technology Ltd | Static energising system for a generator and method for operation of such an energising system |
| CN102013866A (en) * | 2009-09-07 | 2011-04-13 | 阿尔斯托姆科技有限公司 | Static exciter of an electric generator, method for retrofitting and method for operating the same |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023410A (en) * | 2012-12-21 | 2013-04-03 | 重庆磐达机械有限公司 | Double-excitation system for air-cooled generator set |
| CN104201698A (en) * | 2014-09-05 | 2014-12-10 | 广东电网公司佛山供电局 | System and method for controlling dynamic stability of DC bus voltage based on dual-PWM energy accumulating current transformer |
| CN106505591A (en) * | 2016-12-15 | 2017-03-15 | 清华大学 | A kind of multi-machine power system ultra-low frequency oscillation analysis method |
| CN106505591B (en) * | 2016-12-15 | 2019-03-01 | 清华大学 | A kind of multi-machine power system ultra-low frequency oscillation analysis method |
| CN108808698A (en) * | 2018-05-08 | 2018-11-13 | 全球能源互联网研究院有限公司 | Distributed sub-synchronous oscillation restraining device based on energy storage and new energy transmission system |
| CN113315153A (en) * | 2021-05-31 | 2021-08-27 | 广东电网有限责任公司广州供电局 | System, method and device for improving tolerance capability of auxiliary frequency converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104410105B (en) | Based on dc bus cancellated Intelligent wind power field control method | |
| CN102324754B (en) | Double-feed wind power generator low-voltage through control system based on energy storage device | |
| CN101888094A (en) | Energy storage method for double-feed current transformer | |
| CN101950973A (en) | Double-fed wind generating set control system and stable control method | |
| CN102386826A (en) | Self-shunt excitation system based on energy storage type dynamic voltage restorer | |
| CN101950974A (en) | Electric energy quality regulating system based on energy storing of super capacitor | |
| CN104362656A (en) | Control method based on hybrid energy storage voltage source inverter (VSI) stabilizing microgrid power fluctuation | |
| CN105119262A (en) | Circuit capable of simultaneously adjusting the quality of electric energy and performing active arc extinguishing on a low-current ground fault | |
| Anju et al. | Co-ordination of SMES with STATCOM for mitigating SSR and damping power system oscillations in a series compensated wind power system | |
| Wang et al. | A study on critical clearing time (CCT) of micro-grids under fault conditions | |
| CN206389289U (en) | A kind of frequency transformer for elevator for possessing reactance voltage disturbance function | |
| CN101127448A (en) | A pulse constant energy charging method and its charging device for lead acid battery | |
| CN202405792U (en) | Mining high-voltage dynamic filter energy saving device | |
| CN108616133A (en) | A kind of energy storage device and its control method | |
| CN101572413B (en) | Low-voltage line voltage compensating device and compensating method thereof | |
| CN202334336U (en) | Active electronic type transformer power supply | |
| Vanitha et al. | Transient Stability Improvement of a squirrel cage induction generator in wind farm using STATCOM with Supercapacitor | |
| CN102545223A (en) | High-voltage dynamic filtering power-saving device for mine | |
| Zhao et al. | Control strategy of automatic charging/discharging of hybrid energy storage systems in DC micro-grid island mode | |
| CN113746140B (en) | Doubly-fed wind turbine fault ride-through method under continuous disturbance of high-voltage direct-current transmission | |
| Xie et al. | A practical method to improve the immunity of adjustable speed drive to transient low voltage disturbance | |
| Xie et al. | Design Study of a Converter Interface Interconnecting an Energy Storage with the dc-link of a VSC | |
| CN215071646U (en) | Improved common capacitor energy storage three-phase voltage compensation device | |
| Raut et al. | Damping of Power System Oscillation using STATCOM Integrated with SMES | |
| de Toledo et al. | Aspects on infeed of multiple HVDC into one ac network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120321 |