CN102163842A - Method for switching control modes of parallel-connection type multi-terminal direct current power transmission system - Google Patents
Method for switching control modes of parallel-connection type multi-terminal direct current power transmission system Download PDFInfo
- Publication number
- CN102163842A CN102163842A CN2011100584042A CN201110058404A CN102163842A CN 102163842 A CN102163842 A CN 102163842A CN 2011100584042 A CN2011100584042 A CN 2011100584042A CN 201110058404 A CN201110058404 A CN 201110058404A CN 102163842 A CN102163842 A CN 102163842A
- Authority
- CN
- China
- Prior art keywords
- transmission system
- inverter station
- parallel
- control
- terminal
- 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
Landscapes
- Inverter Devices (AREA)
Abstract
The invention provides a method for switching control modes of a parallel-connection type multi-terminal direct current power transmission system, which is used to realize switching between a voltage set terminal and a current control terminal in the parallel-connection type multi-terminal direct current power transmission system in a stable running state. Current margins are transferred to the current control terminal from a voltage determination terminal, and the gear of a converter transformer tap at any terminal is regulated at the same time, wherein a typically regulating gear is 1-2% of a rated voltage, thus realizing the switching between the voltage set terminal and the current control terminal in the parallel-connection type multi-terminal direct current power transmission system. The method is utilized to quickly and stably realize switching of the control modes between inverter stations when the parallel-connection type multi-terminal direct current power transmission system runs stably, thereby greatly improving the rate that the respective inverter stations exit out of running and the stability of the system.
Description
Technical field:
Patent of the present invention relates to a kind of power equipment operation, specifically is meant a kind of method that is used for parallel multiterminal DC transmission system control model conversion.
Background technology:
In large regional grid is interconnected, undertaken interconnected by DC transmission system between the regional power grid, help realizing asynchronous operation and isolation between large regional grid, can overcome the interconnected stable problem that brings of the long distance of the excessive AC electric power systems of capacity, improve the stability of the dynamic quality and the raising large regional grid of large regional grid.Yet traditional DC transmission system mostly is double ended system greatly, only can realize that point-to-point direct current power transmits, and when adopting direct current interconnected between a plurality of AC system, needs many DC power transmission line, and this will greatly improve cost of investment and operating cost.So multiterminal direct current transportation (Multi-terminal HVDC, i.e. MTDC) system just arises at the historic moment.
Over nearly 20 years, along with two ends direct current transportation technology is gradually improved, direct current transportation is used more and more wider, and circuit is more and more, and is more urgent to the demand of multiterminal direct current.Particularly along with the development of all-controlling power electronics device, use based on the VSC type high voltage direct current transmission acquisition of Device Commutation, traditional circuit change of current direct current transportation and VSC type high voltage direct current transmission are combined into the multiterminal direct current transportation and have opened up new field.Many countries become very active to multiterminal direct current transportation Study on Technology.Existing a plurality of multiterminal direct current transportation move and are building.The process that China has also listed the multi-terminal high-voltage direct current transportation in research, planning and demonstration construction has suffered.
The mode of connection of multiterminal DC transmission system mainly is divided into parallel and tandem two classes.In the multiterminal DC transmission system of also wiring, the direct voltage of all current conversion stations all is identical.After the stable operation of parallel multiterminal DC transmission system, has only a terminal control voltage, remaining terminal Control current.During stable operation, can often run into the transfer problem that voltage is set end and current controling end.For example, when voltage setting end was out of service, the Inverter Station that voltage need be set end be converted into current controling end, and another current controling end is converted into the voltage setting and holds.The target of patent of the present invention is exactly to guarantee to provide a kind of reliable method under the prerequisite of parallel multiterminal DC transmission system even running, and when realizing stable operation, voltage is set the conversion between end and the current controling end.
Summary of the invention:
The purpose of patent of the present invention is to disclose a kind of method that is used for parallel multiterminal DC transmission system control model conversion.
Realize that main circuit technical scheme of the present invention is as follows:
Main circuit is made up of bipolar 12 pulsation converting plants (B1) and two bipolar 12 pulsation Inverter Station 2 (B2), Inverter Station 3 (B3).Comprise converter, converter transformer and smoothing reactor in converting plant and the Inverter Station, converter transformer all adopts the three-phase two winding transformer.
Realize that multiterminal DC transmission system controlling schemes of the present invention is as follows:
Converting plant (B1) is provided with and decides Current Control and minimum trigger angle control, and Inverter Station 2 (B2) and Inverter Station 3 (B3) all are provided with decides Current Control and decide extinguish angle control.From the viewpoint of voltage stability, for the overvoltage that helps under the load rejection situation suppresses, under stable situation, converting plant and Inverter Station 2 adopt decides direct current control, and Inverter Station 3 adopts decides extinguish angle control.
The controlling schemes that realizes control model conversion of the present invention is as follows:
During steady operation, Inverter Station 3 is converted into current controling end, Inverter Station 2 is converted into voltage decision end.With electric current nargin Δ I
dWhen transferring to Inverter Station 2, regulate the tap of Inverter Station 2 or Inverter Station 3 converter transformers, the conversion (concrete adjustment process is referring to execution mode) of realization control model that just can quick and stable from Inverter Station 3.Referring to Fig. 1.
Description of drawings:
Fig. 1 is main circuit connection figure of the present invention.
Fig. 2, Fig. 3, Fig. 4 are that control model of the present invention transforms oscillogram.
Embodiment:
Fig. 1 referring to claims, the specific embodiment of the present invention is as follows: after treating three end DC transmission system even runnings, Inverter Station 3 becomes 0.0p.u with electric current nargin apace by 0.1p.u, Inverter Station 2 becomes 0.1p.u with electric current nargin apace by 0.0p.u, regulates Inverter Station 3 or Inverter Station 2 converter transformer tap gears simultaneously.It is too small that the tap gear is regulated, and may will can't realize the conversion of control model between two Inverter Station, yet that the tap gear is regulated is excessive, the situation of overcurrent in short-term will occur.And it is big more that the tap gear is regulated, and the switching rate of control model is just fast more between two Inverter Station.Typical case's regulation stall is the 1-2% rated voltage.
The method of control model conversion between the parallel multiterminal DC transmission system Inverter Station that the present invention is clear and definite, according to this method, parallel multiterminal DC transmission system, will be under the stable operation situation, realize the conversion of control model between Inverter Station fast, stably, thereby greatly improved the stability of indivedual current conversion stations speed out of service and system.
Claims (5)
1. one kind is used for the method that parallel multiterminal DC transmission system control model is changed, and parallel three end transmission system main circuits (Fig. 1) comprise converter, converter transformer and smoothing reactor.The characteristics of this system are:
A) form by bipolar 12 pulsation converting plants (B1) and two bipolar 12 pulsation Inverter Station 2 (B2), Inverter Station 3 (B3);
B) converting plant (B1) is provided with and decides Current Control and minimum trigger angle control, and Inverter Station 2 (B2) and Inverter Station 3 (B3) all are provided with decides Current Control and decide extinguish angle control;
C) from the viewpoint of voltage stability, for the overvoltage that helps under the load rejection situation suppresses, under stable situation, converting plant and Inverter Station 2 adopt decides direct current control, and Inverter Station 3 adopts decides extinguish angle control.
2. press the described method of claim 1, when it is characterized in that being applied to parallel multiterminal direct current transportation stable operation, the conversion of control model between the inversion terminal.
3. by the described method of claim 1, it is characterized in that providing a cover feasible control method.Only need simple several steps just can real inversion terminal between the conversion of control model quick and stable.
4. by the described method of claim 1, after it is characterized in that treating the stable operation of multiterminal DC transmission system, change the electric current nargin of the Inverter Station that needs transform mode control, electric current nargin is transferred to original current controling end by original voltage decision end, regulate any one current conversion station converter transformer tap gear simultaneously, when realizing stable operation, voltage is set the conversion between end and the current controling end.
5. by the described method of claim 1, it is too small to it is characterized in that the tap gear is regulated, and may will can't realize the conversion of control model between two Inverter Station, yet that the tap gear is regulated is excessive, the situation of overcurrent in short-term will occur.And it is big more that the tap gear is regulated, and the switching rate of control model is just fast more between two Inverter Station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100584042A CN102163842A (en) | 2011-03-11 | 2011-03-11 | Method for switching control modes of parallel-connection type multi-terminal direct current power transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100584042A CN102163842A (en) | 2011-03-11 | 2011-03-11 | Method for switching control modes of parallel-connection type multi-terminal direct current power transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102163842A true CN102163842A (en) | 2011-08-24 |
Family
ID=44464888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100584042A Pending CN102163842A (en) | 2011-03-11 | 2011-03-11 | Method for switching control modes of parallel-connection type multi-terminal direct current power transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102163842A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427238A (en) * | 2011-10-26 | 2012-04-25 | 中国南方电网有限责任公司超高压输电公司 | Method for adjusting gear signals of tap switch during parallel running of different converter transformers |
| CN102857086A (en) * | 2012-09-12 | 2013-01-02 | 中国能源建设集团广东省电力设计研究院 | Device and method for starting three-terminal flexible direct-current power transmission system |
| CN103066614A (en) * | 2012-12-31 | 2013-04-24 | 南方电网科学研究院有限责任公司 | Multi-end flexible direct current transmission system and starting method thereof |
| CN103187722A (en) * | 2013-04-09 | 2013-07-03 | 国家电网公司 | Direct current side overvoltage protective device and method for flexible direct current transmission system |
| CN103257589A (en) * | 2013-03-29 | 2013-08-21 | 国家电网公司 | Voltage regulator simulator |
| CN103269083A (en) * | 2013-04-22 | 2013-08-28 | 国家电网公司 | Multi-terminal high-voltage direct-current power transmission system |
| WO2013152482A1 (en) * | 2012-04-11 | 2013-10-17 | Abb Technology Ltd. | Master control method for a series mtdc system and element thereof |
| WO2014048032A1 (en) * | 2012-09-26 | 2014-04-03 | 辽宁省电力有限公司大连供电公司 | Adjustment method and system for flexible direct current power transmission coupling transformer on-load tap changer |
| CN105429165A (en) * | 2015-12-23 | 2016-03-23 | 湖北工业大学 | Multi-port hybrid DC power transmission system topology for power supply to multi-droppoint passive network and control method of multi-port hybrid DC power transmission system topology |
| CN105870910A (en) * | 2016-04-28 | 2016-08-17 | 华北电力大学 | Switching method for parallel multiterminal direct-current transmission system control mode |
| CN106549408A (en) * | 2016-10-11 | 2017-03-29 | 许继集团有限公司 | A kind of multiterminal HVDC transmission system inverter puts into method online |
| CN108512242A (en) * | 2018-05-07 | 2018-09-07 | 北京四方继保自动化股份有限公司 | A kind of method that power instruction is coordinated between three ends mixed DC system station |
| CN109193733A (en) * | 2018-09-13 | 2019-01-11 | 国网山东省电力公司电力科学研究院 | HVDC supports DC control system method for analyzing stability under receiving-end system reset mode |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060282239A1 (en) * | 2005-06-08 | 2006-12-14 | Chang Gung University | Method of setting-up steady state model of VSC-based multi-terminal HVDC transmission system |
-
2011
- 2011-03-11 CN CN2011100584042A patent/CN102163842A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060282239A1 (en) * | 2005-06-08 | 2006-12-14 | Chang Gung University | Method of setting-up steady state model of VSC-based multi-terminal HVDC transmission system |
Non-Patent Citations (2)
| Title |
|---|
| 张重实: "多端直流输电系统的控制问题", 《中国电力》, vol. 29, no. 7, 31 December 1996 (1996-12-31), pages 54 - 57 * |
| 项玲等: "多端和多馈入直流输电系统中换相失败的研究", 《电力系统自动化》, vol. 29, no. 11, 10 June 2005 (2005-06-10), pages 29 - 33 * |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427238B (en) * | 2011-10-26 | 2013-12-18 | 中国南方电网有限责任公司超高压输电公司 | Method for adjusting gear signals of tap switch during parallel running of different converter transformers |
| CN102427238A (en) * | 2011-10-26 | 2012-04-25 | 中国南方电网有限责任公司超高压输电公司 | Method for adjusting gear signals of tap switch during parallel running of different converter transformers |
| CN103718413A (en) * | 2012-04-11 | 2014-04-09 | Abb技术有限公司 | Master control method for a series MTDC system and element thereof |
| WO2013152482A1 (en) * | 2012-04-11 | 2013-10-17 | Abb Technology Ltd. | Master control method for a series mtdc system and element thereof |
| CN102857086A (en) * | 2012-09-12 | 2013-01-02 | 中国能源建设集团广东省电力设计研究院 | Device and method for starting three-terminal flexible direct-current power transmission system |
| WO2014048032A1 (en) * | 2012-09-26 | 2014-04-03 | 辽宁省电力有限公司大连供电公司 | Adjustment method and system for flexible direct current power transmission coupling transformer on-load tap changer |
| CN103066614A (en) * | 2012-12-31 | 2013-04-24 | 南方电网科学研究院有限责任公司 | Multi-end flexible direct current transmission system and starting method thereof |
| CN103257589A (en) * | 2013-03-29 | 2013-08-21 | 国家电网公司 | Voltage regulator simulator |
| CN103257589B (en) * | 2013-03-29 | 2015-12-23 | 国家电网公司 | A kind of voltage regulator simulator |
| CN103187722A (en) * | 2013-04-09 | 2013-07-03 | 国家电网公司 | Direct current side overvoltage protective device and method for flexible direct current transmission system |
| WO2014166129A1 (en) * | 2013-04-09 | 2014-10-16 | 国家电网公司 | Overvoltage protection device and protection method for direct current side of flexible direct current transmission system |
| CN103187722B (en) * | 2013-04-09 | 2015-12-09 | 国家电网公司 | For flexible direct current power transmission system DC side overvoltage protection and guard method |
| CN103269083A (en) * | 2013-04-22 | 2013-08-28 | 国家电网公司 | Multi-terminal high-voltage direct-current power transmission system |
| CN103269083B (en) * | 2013-04-22 | 2017-02-22 | 国家电网公司 | Multi-terminal high-voltage direct-current power transmission system |
| CN105429165A (en) * | 2015-12-23 | 2016-03-23 | 湖北工业大学 | Multi-port hybrid DC power transmission system topology for power supply to multi-droppoint passive network and control method of multi-port hybrid DC power transmission system topology |
| CN105870910A (en) * | 2016-04-28 | 2016-08-17 | 华北电力大学 | Switching method for parallel multiterminal direct-current transmission system control mode |
| CN106549408A (en) * | 2016-10-11 | 2017-03-29 | 许继集团有限公司 | A kind of multiterminal HVDC transmission system inverter puts into method online |
| CN108512242A (en) * | 2018-05-07 | 2018-09-07 | 北京四方继保自动化股份有限公司 | A kind of method that power instruction is coordinated between three ends mixed DC system station |
| CN109193733A (en) * | 2018-09-13 | 2019-01-11 | 国网山东省电力公司电力科学研究院 | HVDC supports DC control system method for analyzing stability under receiving-end system reset mode |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102163842A (en) | Method for switching control modes of parallel-connection type multi-terminal direct current power transmission system | |
| EP3082212B1 (en) | Tripolar flexible direct-current power transmission system and method | |
| CN204333980U (en) | A kind of urban track traffic rectification and regenerative braking inversion feedback device | |
| CN105429165B (en) | A kind of multiterminal Hybrid HVDC system topological and control method to the power supply of more drop point passive networks | |
| CN102983568A (en) | Modular multilevel converter high voltage direct current (MMC-HVDC) converter station starting method used for power network black start | |
| CN107482668B (en) | High voltage direct current determines reactive power AC fault restoration methods and device | |
| US10141743B2 (en) | Bipolar VSC-HVDC and UPFC hybrid topology and an operation method thereof | |
| CN103269083A (en) | Multi-terminal high-voltage direct-current power transmission system | |
| CN107359579B (en) | Intensive direct-current ice melting device based on SVG and diode rectifier complementation | |
| CN102801170A (en) | Reactive-voltage control method and system of regional power-grid substations | |
| CN106849156A (en) | A kind of direct-current grid and off-network transfer bus voltage control smoothing method and system | |
| CN104795834A (en) | Hybrid direct-current transmission topology structure and control method | |
| CN105870910A (en) | Switching method for parallel multiterminal direct-current transmission system control mode | |
| CN104022523A (en) | Voltage and current polarity control method for modulation electrode of high-voltage direct current tripolar power transmission system | |
| CN105790300B (en) | A kind of wind turbine grid-connected system based on Hybrid HVDC | |
| CN201312265Y (en) | Silicon-controlled rectifying device | |
| CN107910877A (en) | Shunt capacitor switching control method during a kind of sending end current conversion station high power fluctuation | |
| CN104716652A (en) | Magnetically controlled shunt reactor | |
| CN203826977U (en) | Power electronic transformer | |
| CN103633652A (en) | Subarea power grid interconnection system and method | |
| CN104578131A (en) | DC transmission automatic power flow reversal control method | |
| Sun et al. | Coordination control for multi-voltage-level dc grid based on the dc–dc converters | |
| CN112491092A (en) | Safety scheduling method for flexible platform area | |
| CN107785921B (en) | Urban power grid partition interconnection operation scheduling method based on flexible direct current transmission technology | |
| Luo et al. | A Control Strategy of VSC-MTDC Transmission System Based on Voltage Margin |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110824 |
|
| WD01 | Invention patent application deemed withdrawn after publication |