CN103532161B - Hybrid HVDC system topology based on accessory power supply and startup method - Google Patents
Hybrid HVDC system topology based on accessory power supply and startup method Download PDFInfo
- Publication number
- CN103532161B CN103532161B CN201310434080.7A CN201310434080A CN103532161B CN 103532161 B CN103532161 B CN 103532161B CN 201310434080 A CN201310434080 A CN 201310434080A CN 103532161 B CN103532161 B CN 103532161B
- Authority
- CN
- China
- Prior art keywords
- inverter
- power
- power supply
- vsc
- circuit breaker
- 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.)
- Active
Links
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
- 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]
Landscapes
- Inverter Devices (AREA)
Abstract
The present invention relates to a kind of topological structure and the startup method of Hybrid HVDC system start-up mode, especially relate to a kind of Hybrid HVDC system topology based on accessory power supply and startup method.The present invention is directed to a both-end bulk power grid Hybrid HVDC system, its rectification side uses VSC inverter, and inverter side uses LCC inverter, a startup power supply being made up of uncontrollable rectifier device in parallel in the middle of DC line.The DC voltage start-up course with completion system is initially set up by starting power supply.Therefore; present invention have the advantage that 1. when being applied in the bulk power grid Hybrid HVDC system starting process of actual two ends; this startup method of problem 2. that can effectively solve to start DC voltage shortage can effectively reduce the impact of system voltage electric current in start-up course, protects power equipment safety.
Description
Technical field
The present invention relates to a kind of topological structure and the startup method of Hybrid HVDC system start-up mode, especially relate to a kind of Hybrid HVDC system topology based on accessory power supply and startup method.
Background technology
In recent years, along with the development of high voltage dc transmission technology, based on technology and the consideration of economic factor, the Hybrid HVDC system that LCC inverter is constituted with VSC inverter has preferable application prospect.Presently, Hybrid HVDC system is at wind-electricity integration, light current net and passive network is powered, the fields such as load center transmission of electricity have prominent superiority of effectiveness to big city etc., believe that Hybrid HVDC system will have the most wide application prospect along with country's development of wind-powered electricity generation and being continuously increased of urban power consumption.Particularity-include the one-way flow of trend and the problem that two ends current conversion station entry condition is inconsistent due to Hybrid HVDC system, when connecting AC system, current most of mixed DC system equal prioritizing selection VSC side is constant DC voltage control, so Hybrid HVDC system entirety control strategy and application are respectively formed great restriction, and when LCC realizes DC voltage control (or determining gamma kick) as Inverter Station, its difficulty is that the entry condition of VSC and LCC is conflicting, in order to solve this bottleneck, the starting problem of Hybrid HVDC system under this application scenarios must be solved.
Summary of the invention
The above-mentioned technical problem of the present invention is mainly addressed by following technical proposals:
A kind of Hybrid HVDC system topology based on accessory power supply, it is characterized in that, rectification side is that electric network source connects first change of current of VSC inverter by first converter power transformer, first converter power transformer primary side arranges first AC circuit breaker, AC one group of characteristic harmonics wave filter corresponded under VSC inverter switching frequency in parallel at VSC inverter, converter reactor of simultaneously connecting on alternating current circuit；Described characteristic harmonics wave filter mainly 6 times, the characteristic harmonics wave filter of 12 times switch produced harmonic wave stable DC electric current to filter LCC inverter.
Inverter side is to be linked into electrical network through the second converter power transformer and the 3rd converter power transformer respectively after the six kinds of pulses of two parallel connections moves LCC inverter and intermediate point ground connection, and the second converter power transformer secondary side and the 3rd converter power transformer primary side are connected with the second AC circuit breaker simultaneously；
Described VSC inverter is connected with LCC inverter through DC line, and described DC line is also associated with start-up circuit.
VSC inverter uses d-q to decouple Direct Current Control, and its real power control amount is active power, and idle controlled quentity controlled variable is reactive power, adopts the most easily controllable brachium pontis and cut-offs, it is achieved the flexible control of power.LCC inverter uses determines Control of Voltage.
At above-mentioned Hybrid HVDC system topology based on accessory power supply, described DC line includes two electric capacity of voltage regulation being connected in parallel on the outlet of rectification side VSC inverter；Two LCC Converter DC-side ports of export are connected respectively and are connected with the rectification side at VSC inverter after a flat ripple reactance, and a stack features subharmonic wave filter in parallel is also distinguished at DC line the two poles of the earth.
At above-mentioned Hybrid HVDC system topology based on accessory power supply, described start-up circuit includes a startup power supply, described startup power supply connects the 3rd converter power transformer to three-phase bridge uncontrollable rectifier circuit through the 3rd AC circuit breaker, then DC line the two poles of the earth it are parallel to, it is connected in parallel with a capacitor at uncontrollable rectifier circuit exit, dc circuit breaker is set with DC circuit interface end.
A kind of startup method of Hybrid HVDC system based on accessory power supply, it is characterised in that comprise the following steps:
Step 1, is in whole system stopped status, VSC inverter and LCC inverter and connects AC system by the first converter power transformer and the second converter power transformer respectively and be in blocking.
Step 2, starts to be respectively closed the dc circuit breaker of uncontrollable rectifier DC side and the 3rd AC circuit breaker, makes to gradually build up DC voltage on DC line by the charge circuit of accessory power supply and reaches the 0.95pu of rated direct voltage；
Step 3, disconnects accessory power supply, i.e. disconnects the 3rd AC circuit breaker and the dc circuit breaker in uncontrollable rectifier loop；It is closed at rectification side the first AC circuit breaker and starts VSC inverter, setting meritorious power command value as 0.1pu, reactive power command value as 0pu；When DC voltage reaches 1.0pu, then Guan Bi inverter side the second AC circuit breaker starts LCC inverter, and system completes start-up course and enters steady-state operating condition.It should be noted that, pu refers to perunit value here, according to user's sets itself reference value.
Therefore; present invention have the advantage that 1. when being applied in the bulk power grid Hybrid HVDC system starting process of actual two ends; VSC inverter is started and needs the startup of DC voltage, LCC inverter to need RF power fed-in; but both of which can not mutually give the most required this contradiction of condition before Qi Donging; this kind of startup method of a good solution 2. can be provided can to effectively reduce the impact of system voltage electric current in start-up course, thus protect power equipment, extend its service life.
Accompanying drawing explanation
Fig. 1 is the total topology schematic diagram of the present invention.
Fig. 2 is the control block diagram of the commutator related in the present invention.
Fig. 3 is the control block diagram of the inverter related in the present invention.
Fig. 4 is the start-up course flow chart related in the present invention.
Detailed description of the invention
Below by embodiment, and combine accompanying drawing, technical scheme is described in further detail.
Embodiment:
If Fig. 1 is that whole Hybrid HVDC starts system topological figure, wherein 1 is two ends AC system, 2.1 is the first AC circuit breaker, 2.2 is the second AC circuit breaker, 2.3 is the second AC circuit breaker, 3.1 is the first converter power transformer, 3.2 is the second converter power transformer, 3.3 is the 3rd converter power transformer, 3.4 is the 4th converter power transformer, 4 is alternating current filter, 4.5 is converter reactor, 5 is VSC inverter, 6 is LCC inverter, 7 is electric capacity of voltage regulation, 8 is dc circuit breaker, 9 is DC filter, 10 is flat ripple reactance, 11 for starting power supply, 12 is uncontrollable rectifier circuit.
Fig. 2, the 3 basic controlling block diagrams being respectively rectification side VSC inverter and inverter side LCC inverter.Wherein VSC inverter uses the Direct Current Control mode of d-q decoupling in order to determine transmitting active power, and LCC inverter then uses PI ring to control to determine DC voltage.
Fig. 4 gives the basic procedure of two ends bulk power grid Hybrid HVDC system starting process, its detailed description of the invention is first to start uncontrollable rectifier power supply close the respectively dc circuit breaker in start-up circuit and AC circuit breaker, now start power supply to start to gradually build up DC voltage for DC capacitor charging, close rectification side AC circuit breaker when DC voltage reaches 0.95pu and start VSC inverter, enabled instruction value active power is 0.1pu, and reactive power is 0pu.The AC circuit breaker starting power circuit is cut off with dc circuit breaker to reach to exit the purpose of startup power circuit while starting VSC inverter.Now, rely on VSC determine active power controller can continue as DC capacitor charging, DC voltage continue rise.When DC voltage reaches 1pu, Guan Bi inverter side AC circuit breaker and startup LCC inverter, power is gradually transferred to inverter side AC system by rectification side AC system, now it is gradually increased VSC inverter active power command value to 1.0pu, through-put power also will gradually rise and reach rated power, and whole start-up course is basically completed.
Specific embodiment described herein is only to present invention spirit explanation for example.Described specific embodiment can be made various amendment or supplements or use similar mode to substitute by those skilled in the art, but without departing from the spirit of the present invention or surmount scope defined in appended claims.
Claims (2)
1. a Hybrid HVDC system topology based on accessory power supply, it is characterised in that whole
Stream side is that electric network source connects VSC inverter, the first converter power transformer by first converter power transformer
Primary side arranges first AC circuit breaker, and one group in parallel of the AC at VSC inverter corresponds to
Characteristic harmonics wave filter under VSC inverter switching frequency, change of current reactance of simultaneously connecting on alternating current circuit
Device；
Inverter side is that the six kinds of pulses of two parallel connections moves after LCC inverter and intermediate point ground connection respectively through second change of current
Transformator and the 3rd converter power transformer are linked into electrical network, the second converter power transformer secondary side and the 3rd change of current
Transformator primary side is connected with the second AC circuit breaker simultaneously；
Described VSC inverter is connected with LCC inverter through DC line, on described DC line also
Connect and have start-up circuit；
Described DC line includes two electric capacity of voltage regulation being connected in parallel on the outlet of rectification side VSC inverter；
Two LCC Converter DC-side ports of export connect respectively after a flat ripple reactance again with VSC inverter
Rectification side connects, and a stack features subharmonic wave filter in parallel is also distinguished at DC line the two poles of the earth；
Described start-up circuit includes a startup power supply, and described startup power supply connects through the 3rd AC circuit breaker
Four converter power transformers, to three-phase bridge uncontrollable rectifier circuit, are then parallel to DC line the two poles of the earth, not
Control rectifying circuit outlet is connected in parallel with a capacitor, and arranges dc circuit breaker with DC circuit interface end.
2. the startup method of a Hybrid HVDC system based on accessory power supply, it is characterised in that
Comprise the following steps:
First start uncontrollable rectifier power supply the dc circuit breaker that closes respectively in start-up circuit and break with exchanging
Road device, now starts power supply and starts to gradually build up DC voltage for DC capacitor charging, work as DC voltage
Closing rectification side AC circuit breaker when reaching 0.95pu and start VSC inverter, enabled instruction value is gained merit
Power is 0.1pu, and reactive power is 0pu；Cut off while starting VSC inverter and start power supply electricity
The AC circuit breaker on road and dc circuit breaker are to reach to exit the purpose of startup power circuit；Now, depend on
Active power controller of determining by VSC continues as DC capacitor charging, and DC voltage continues to rise；When directly
When stream voltage reaches 1pu, Guan Bi inverter side AC circuit breaker and startup LCC inverter, power is gradually
By rectification side AC system, it is transferred to inverter side AC system, is now gradually increased VSC inverter
Active power command value is to 1.0pu, and through-put power also will gradually rise and reach rated power, whole startup
Process completes；
Wherein, VSC inverter uses the Direct Current Control mode of d-q decoupling in order to determine transmission wattful power
Rate, LCC inverter then uses PI ring to control to determine DC voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310434080.7A CN103532161B (en) | 2013-09-23 | 2013-09-23 | Hybrid HVDC system topology based on accessory power supply and startup method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310434080.7A CN103532161B (en) | 2013-09-23 | 2013-09-23 | Hybrid HVDC system topology based on accessory power supply and startup method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103532161A CN103532161A (en) | 2014-01-22 |
| CN103532161B true CN103532161B (en) | 2016-09-28 |
Family
ID=49933960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310434080.7A Active CN103532161B (en) | 2013-09-23 | 2013-09-23 | Hybrid HVDC system topology based on accessory power supply and startup method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103532161B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350770A (en) * | 2019-06-20 | 2019-10-18 | 武汉大学 | Series IGBT method for equalizing voltage and system based on auxiliary voltage source |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3295533A4 (en) * | 2015-05-13 | 2018-11-07 | ABB Schweiz AG | Hybrid high voltage direct current converter station and operation method therefor |
| CN104967141B (en) * | 2015-06-26 | 2017-12-26 | 许继电气股份有限公司 | A kind of Hybrid HVDC system |
| GB2545455A (en) * | 2015-12-17 | 2017-06-21 | General Electric Technology Gmbh | Power supply apparatus |
| CN105429165B (en) * | 2015-12-23 | 2018-10-26 | 湖北工业大学 | A kind of multiterminal Hybrid HVDC system topological and control method to the power supply of more drop point passive networks |
| CN106936154B (en) * | 2015-12-29 | 2021-10-01 | 中国电力科学研究院 | Series-parallel direct-current power grid starting method for large-scale long-distance offshore wind power grid connection |
| CN108092295A (en) * | 2016-11-21 | 2018-05-29 | 南方电网科学研究院有限责任公司 | Online input method for single valve bank in hybrid direct-current system |
| CN108111030B (en) * | 2017-12-07 | 2020-09-15 | 上海交通大学 | Hybrid offshore wind field direct current converter |
| CN111541259B (en) * | 2020-04-23 | 2021-07-30 | 南方电网科学研究院有限责任公司 | Charging control method, device and medium for hybrid multi-terminal direct current transmission system |
| CN114499144A (en) | 2020-10-23 | 2022-05-13 | 台达电子企业管理（上海）有限公司 | Auxiliary power supply device for inverter, inverter and starting method of inverter |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1014240A (en) * | 1996-06-25 | 1998-01-16 | Hitachi Ltd | Method of starting hybrid dc transmission facility, and its device |
| CN102522764A (en) * | 2011-11-07 | 2012-06-27 | 华中科技大学 | Hybrid two-end direct-current power transmission system |
| CN103311944B (en) * | 2013-05-16 | 2016-04-20 | 国家电网公司 | A kind of THE UPFC and starting method thereof adopting modular construction |
-
2013
- 2013-09-23 CN CN201310434080.7A patent/CN103532161B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350770A (en) * | 2019-06-20 | 2019-10-18 | 武汉大学 | Series IGBT method for equalizing voltage and system based on auxiliary voltage source |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103532161A (en) | 2014-01-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103532161B (en) | Hybrid HVDC system topology based on accessory power supply and startup method | |
| CN203071836U (en) | Mixed microgrid system and AC/DC coupler thereof | |
| CN104953686B (en) | Control method for charge-discharge virtual synchronization motor for electromobile energy storage | |
| CN104362662B (en) | A kind of LCC-VSC type Hybrid HVDC system topology and startup method | |
| Zhao et al. | Switched Z-source isolated bidirectional DC–DC converter and its phase-shifting shoot-through bivariate coordinated control strategy | |
| CN106712238B (en) | The charging method of one seed module mixed type inverter | |
| CN108123491A (en) | A kind of highly integrated motor driving and charge and discharge electric appliance integration topology | |
| WO2023179029A1 (en) | Control method for offshore wind power uncontrolled rectifier direct-current power transmission system | |
| CN105024582A (en) | Novel two-stage bidirectional energy storage converter control system and control method thereof | |
| CN103915856B (en) | A kind of base station is grid-connected-charging photovoltaic micro-inverter system and control method thereof | |
| CN208675119U (en) | A kind of high-power ac-dc conversion power supply | |
| CN105811453A (en) | Distributed energy intelligent access system and access method thereof | |
| CN103532162B (en) | Based on the topological structure and the starting method that control the Hybrid HVDC system switched | |
| CN110071572A (en) | A kind of Bidirectional charging-discharging one emergency power supply unit and its control method | |
| CN206789649U (en) | A kind of Lithium Polymer Battery Formation System | |
| CN103532163B (en) | The Hybrid HVDC system topology switched based on polarity and starting method | |
| CN102969742A (en) | Multifunction photovoltaic power generation experiment system and control method thereof | |
| CN102916435A (en) | Battery energy-storage power conversion system containing Z source network and control method therefor | |
| CN106300200A (en) | A kind of removable DC de-icing device having STATCOM function concurrently and de-icing method thereof | |
| CN204258410U (en) | Possesses the energy storage converter device of many Battery packs and super capacitor access function | |
| Nayak | Electric vehicle charging topologies, control schemes for smart city application | |
| CN102957335A (en) | Bidirectional battery storage inverter used for grid-connected systems | |
| CN105391047A (en) | Vehicle-mounted direct current micro-grid system and control method | |
| CN108347067A (en) | A kind of microgrid framework and control method containing battery energy storage and generator | |
| CN205407292U (en) | Distributing type energy intelligence access system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |