CN109873441A - A kind of wind-powered electricity generation flexible direct current transmitting system with distributed DC energy-consuming device - Google Patents
A kind of wind-powered electricity generation flexible direct current transmitting system with distributed DC energy-consuming device Download PDFInfo
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- CN109873441A CN109873441A CN201910251524.0A CN201910251524A CN109873441A CN 109873441 A CN109873441 A CN 109873441A CN 201910251524 A CN201910251524 A CN 201910251524A CN 109873441 A CN109873441 A CN 109873441A
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- 230000005611 electricity Effects 0.000 title claims abstract description 23
- 238000005265 energy consumption Methods 0.000 claims abstract description 25
- 230000005684 electric field Effects 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 17
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000012935 Averaging Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 230000000295 complement effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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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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Abstract
The invention discloses a kind of wind-powered electricity generation flexible direct current transmitting system with distributed DC energy-consuming device, including the marine wind electric field that several are set side by side, the electric energy that marine wind electric field is sent out is sent into AC network by sending end converter station and receiving end converter station；Being internally integrated for the sending end converter station or receiving end converter station is distributed formula direct current energy-consuming device；When receiving end AC fault occurs for wind-powered electricity generation flexible direct current transmitting system, DC side system voltage is increased, and puts into a certain number of energy consumption resistors, surplus power is consumed by energy consumption resistor, maintains system stable in short-term, after fault recovery, corresponding energy consumption resistor is exited, the fault traversing of system is completed.The present invention can be realized the accurate matching of surplus power, greatly reduce the electrical quantity fluctuation of energy-consuming device switching process, avoid system failure stoppage in transit, realize fault traversing by the way that energy consuming components are evenly distributed in a large amount of submodules.
Description
Technical field
The invention belongs to direct current transmission and distribution fields, send for a kind of wind-powered electricity generation flexible direct current with distributed DC energy-consuming device
System out.
Background technique
Flexible HVDC transmission system, can be in the case where not changing polarity of voltage relative to conventional DC transmission system
Trend reversion is realized by reverse current direction, and there is the flexible DC transmission and flexible direct current network system of higher reliability,
Most significant feature is to be able to achieve multiple feed and more drop points by electricity, provides for electric system a kind of more flexible, efficiently
Power transmission mode.
The grid-connected power generation systems such as large capacity, remote wind power plant, photovoltaic plant, fit through flexible DC transmission side
Formula carries out energy submitting, has that system is stable, the method for operation is flexible, and active reactive independent control etc. is many a little.Meanwhile it is marine
The flexible direct current of wind-powered electricity generation is sent out and the research hotspot of industry.The electric energy of wind power plant, wind power plant are transmitted by flexible DC transmission
The flexible direct current converter valve of one end provides stable alternating voltage for wind power plant using alternating voltage control mode is determined.Therefore, should
Converter station not can control transimission power, and transimission power is determined by wind power plant generated output.If receiving end converter station breaks down, no
It can continue to receive power, transmission system cannot directly limit sending end power, just cause to send receiving end unbalanced power, lead to direct current
Pressure increases, and causes DC over-voltage protection.Due to unresolved power surplus problem in short-term, it is necessary to energy-consuming device is introduced, it will not
Balance power consumption is fallen.Publication No. is " CN108767890A ", entitled " to have the offshore wind farm of energy consumption dc chopper flexible
The Chinese invention patent application of DC transmission system and its fault ride-through method " gives a kind of centralized direct current energy-consuming device
Scheme.Publication No. is " CN107834588A ", the middle promulgated by the State Council of entitled " a kind of inverter energy-consuming device control method and system "
Bright patent application gives a kind of centralized direct current energy-consuming device scheme.But above scheme is during switching energy-consuming device, meeting
Very big power swing is caused, over-voltage and over-current failure is be easy to cause, equipment safety and system stability is had some impact on.
Summary of the invention
It is an object of the invention to be directed to above-mentioned the problems of the prior art, provide a kind of with distributed DC energy consumption dress
The wind-powered electricity generation flexible direct current transmitting system set solves the problems, such as the power surplus in wind-powered electricity generation flexible direct current transmitting system, applied widely
It is general.
To achieve the goals above, the technical solution adopted by the present invention are as follows: the offshore wind farm being set side by side including several
, the electric energy that marine wind electric field is sent out is sent into AC network by sending end converter station and receiving end converter station；The sending end change of current
It stands or being internally integrated for receiving end converter station is distributed formula direct current energy-consuming device, distributed DC energy-consuming device includes being arranged in flexibility
Energy consuming components inside each submodule of DC transmission system, energy consumption power averaging needed for flexible HVDC transmission system are assigned to
In each submodule, each energy consuming components are in series with energy consumption resistor by switching device, when receiving end AC fault occurs for system
When, energy consumption resistor investment is controlled by switching device, energy consumption resistor consumes surplus power, passes through switching device after fault recovery
Control energy consumption resistor exits.
The sending end converter station is marine converter station, and receiving end converter station is land converter station, sending end converter station and receiving end
By cable connection between converter station, the cable uses direct current sea cable or overhead line.
The sending end converter station is internally provided with converter valve, includes submodule and bridge arm reactance in the converter valve
The exchange side of device, converter valve is connected by tietransformer and cable with wind power plant.
The receiving end converter station is internally provided with converter valve, includes submodule and bridge arm reactance in the converter valve
The exchange side of device, converter valve is connected by tietransformer, soft starting device and cable with AC network.
The energy consuming components are connected in parallel on the both ends of flexible HVDC transmission system submodule capacitor.
The switching device uses all-controlling power electronics device.
Compared with prior art, the present invention have it is following the utility model has the advantages that when wind-powered electricity generation flexible direct current transmitting system occur by
When holding AC fault, DC side system voltage is increased, and puts into a certain number of energy consumption resistors at this time, is full of by energy consumption resistor consumption
Complementary work rate maintains system stable in short-term, after fault recovery, exits corresponding energy consumption resistor, complete the fault traversing of system.This hair
Bright solve caused by wind-powered electricity generation flexible direct current transmitting system receiving end AC fault active power submitting in short-term and be obstructed, and then caused
The problem of direct current system voltage increases avoids system failure stoppage in transit, realizes fault traversing.Energy consuming components are averaged by the present invention
It is assigned in a large amount of submodules, can be realized the accurate matching of surplus power, greatly reduce the electricity of energy-consuming device switching process
Tolerance fluctuation.
Detailed description of the invention
Fig. 1 present invention has the wind-powered electricity generation flexible direct current transmitting system figure of distributed DC energy-consuming device；
The converter valve submodule topological diagram of Fig. 2 present invention configuration energy consuming components；
In attached drawing: 1- sending end converter station；2- receiving end converter station；3- cable；4- AC network；5- energy consuming components.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings.
Referring to Fig. 1, the present invention has the wind-powered electricity generation flexible direct current transmitting system of distributed DC energy-consuming device, including wind-powered electricity generation
Field, sending end converter station 1 and receiving end converter station 2, sending end converter station 1 or receiving end converter station 2 are internally integrated distributed DC energy consumption dress
It sets.Marine wind electric field sends out electric energy and successively passes through sending end converter station 1, cable 3, the feeding AC network 4 of receiving end converter station 2.
DC transmission system can use the symmetrical monopolar mode of connection, can also be using the symmetrical bipolar mode of connection.This hair
Tietransformer, converter valve and bridge arm reactor etc. are disposed in the station of bright sending end converter station.It is arranged in the station of receiving end converter station
There are tietransformer, converter valve, bridge arm reactor and soft starting device etc..Distributed DC energy-consuming device can be applied to module
Change in multilevel converter (MMC).Distributed DC energy-consuming device is integrated in inside converter valve, is increased inside each submodule
Energy consumption power averaging required for flexible HVDC transmission system is assigned in each submodule by one energy consuming components 5.Each consumption
Energy component 5 is in series by switching element T 3 and energy consumption resistor R2, and energy consuming components 5 can be directly parallel in submodule capacitor C's
Both ends.
Referring to fig. 2, the present invention configures in the converter valve submodule of energy consuming components, and IGBT element T1, T2 and capacitor C are constituted
The half-bridge submodule on basis, and IGBT element T3 and resistance R2 constitute energy consuming components.R1 is the original discharge resistance of submodule
(also known as equalizing resistance), R2 are the energy consumption resistor of submodule energy consuming components, and T3 is the switching device of submodule energy consuming components.
When receiving end AC fault occurs for wind-powered electricity generation flexible direct current transmitting system, DC side system voltage is increased, at this point it is possible to throw
Enter a certain number of energy consumption resistors, surplus power is consumed by energy consumption resistor, maintains system stable in short-term.
After fault recovery, corresponding energy consumption resistor is exited, completes the fault traversing of system.
Specific embodiment is presented above, but the present invention is not limited to embodiment described above.The present invention
Basic ideas be above-mentioned basic scheme, for those of ordinary skill in the art, introduction according to the present invention is designed each
The model of kind deformation, formula, parameter do not need to spend creative work.The case where not departing from the principle and spirit of the invention
Under to embodiment carry out variation, modification, replacement and deformation still fall in protection scope of the present invention.
Claims (6)
1. a kind of wind-powered electricity generation flexible direct current transmitting system with distributed DC energy-consuming device, it is characterised in that: including several
The marine wind electric field being set side by side, the electric energy that marine wind electric field is sent out are sent by sending end converter station (1) and receiving end converter station (2)
AC network (4)；Being internally integrated for sending end converter station (1) or receiving end converter station (2) is distributed formula direct current energy-consuming device,
Distributed DC energy-consuming device includes the energy consuming components (5) being arranged in inside each submodule of flexible HVDC transmission system, flexible
Energy consumption power averaging needed for DC transmission system is assigned in each submodule, each energy consuming components (5) by switching device with
Energy consumption resistor is in series, when receiving end AC fault occurs for system, controls energy consumption resistor investment, energy consumption electricity by switching device
Resistance consumption surplus power, controls energy consumption resistor by switching device after fault recovery and exits.
2. having the wind-powered electricity generation flexible direct current transmitting system of distributed DC energy-consuming device according to claim 1, feature exists
Be marine converter station in: the sending end converter station (1), receiving end converter station (2) is land converter station, sending end converter station (1) with
It is connected between receiving end converter station (2) by cable (3), the cable uses direct current sea cable or overhead line.
3. having the wind-powered electricity generation flexible direct current transmitting system of distributed DC energy-consuming device according to claim 1, feature exists
In: the sending end converter station (1) is internally provided with converter valve, includes submodule and bridge arm reactance in the converter valve
The exchange side of device, converter valve is connected by tietransformer and cable (3) with wind power plant.
4. having the wind-powered electricity generation flexible direct current transmitting system of distributed DC energy-consuming device according to claim 1, feature exists
In: the receiving end converter station (2) is internally provided with converter valve, includes submodule and bridge arm reactance in the converter valve
The exchange side of device, converter valve is connected by tietransformer, soft starting device and cable (3) with AC network (4).
5. having the wind-powered electricity generation flexible direct current transmitting system of distributed DC energy-consuming device according to claim 1, feature exists
In: the energy consuming components (5) are connected in parallel on the both ends of flexible HVDC transmission system submodule capacitor.
6. having the wind-powered electricity generation flexible direct current transmitting system of distributed DC energy-consuming device according to claim 1, feature exists
In: the switching device uses all-controlling power electronics device.
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| CN201910251524.0A CN109873441A (en) | 2019-03-29 | 2019-03-29 | A kind of wind-powered electricity generation flexible direct current transmitting system with distributed DC energy-consuming device |
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| CN201910251524.0A CN109873441A (en) | 2019-03-29 | 2019-03-29 | A kind of wind-powered electricity generation flexible direct current transmitting system with distributed DC energy-consuming device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224438A (en) * | 2019-07-08 | 2019-09-10 | 重庆大学 | The soft straight transmitting system traversing control method of marine wind electric field under a kind of electric network fault |
| CN110867884A (en) * | 2019-11-18 | 2020-03-06 | 西安西电电力系统有限公司 | Energy consumption module, offshore wind power flexible direct current delivery system and fault ride-through strategy |
| CN111509754A (en) * | 2020-03-23 | 2020-08-07 | 广东电网有限责任公司电网规划研究中心 | Fault ride-through control method for offshore wind power direct current collecting and conveying system |
| CN111555334A (en) * | 2020-04-15 | 2020-08-18 | 南京南瑞继保电气有限公司 | Active discharge method and control device for high-voltage direct-current cable and electronic equipment |
| CN112290526A (en) * | 2020-09-18 | 2021-01-29 | 清华大学 | Direct current collector used as offshore wind power energy management hub |
| CN112436724A (en) * | 2019-08-26 | 2021-03-02 | 南京南瑞继保电气有限公司 | Current conversion device and assembly thereof, reactive power compensation device, current converter and control method thereof |
| CN112448406A (en) * | 2019-09-03 | 2021-03-05 | 南京南瑞继保工程技术有限公司 | Distributed direct current energy consumption device and control method and control module thereof |
| CN113675875A (en) * | 2021-09-06 | 2021-11-19 | 国网江苏省电力有限公司电力科学研究院 | Direct current engineering complete set energy consumption device and control system thereof |
| CN113708361A (en) * | 2021-07-22 | 2021-11-26 | 广东电网有限责任公司阳江供电局 | Parallel direct current system sharing direct current energy consumption device |
| CN113708654A (en) * | 2021-07-27 | 2021-11-26 | 华北电力大学 | Flexible direct-current converter valve integrating surplus power dissipation function and control method |
| CN114094577A (en) * | 2021-11-25 | 2022-02-25 | 中国三峡建工(集团)有限公司 | Coordination method for stability control and energy consumption device of offshore wind power output system |
| EP4012916A4 (en) * | 2019-08-09 | 2023-04-12 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Power conversion apparatus |
| CN117439394A (en) * | 2023-10-25 | 2024-01-23 | 南方电网科学研究院有限责任公司 | Energy self-balancing flexible direct current converter valve, control method and direct current system |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224438A (en) * | 2019-07-08 | 2019-09-10 | 重庆大学 | The soft straight transmitting system traversing control method of marine wind electric field under a kind of electric network fault |
| CN110224438B (en) * | 2019-07-08 | 2021-07-20 | 重庆大学 | Ride-through control method for offshore wind farm flexible direct-sending system under power grid fault |
| EP4012916A4 (en) * | 2019-08-09 | 2023-04-12 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Power conversion apparatus |
| CN112436724A (en) * | 2019-08-26 | 2021-03-02 | 南京南瑞继保电气有限公司 | Current conversion device and assembly thereof, reactive power compensation device, current converter and control method thereof |
| CN112436724B (en) * | 2019-08-26 | 2022-05-17 | 南京南瑞继保电气有限公司 | Current conversion device and assembly thereof, reactive power compensation device, current converter and control method thereof |
| CN112448406B (en) * | 2019-09-03 | 2022-08-26 | 南京南瑞继保工程技术有限公司 | Distributed direct current energy consumption device and control method and control module thereof |
| WO2021043100A1 (en) * | 2019-09-03 | 2021-03-11 | 南京南瑞继保工程技术有限公司 | Distributed direct current energy consumption device, control method therefor, and control module thereof |
| CN112448406A (en) * | 2019-09-03 | 2021-03-05 | 南京南瑞继保工程技术有限公司 | Distributed direct current energy consumption device and control method and control module thereof |
| CN110867884B (en) * | 2019-11-18 | 2023-11-03 | 西安西电电力系统有限公司 | Energy consumption module, offshore wind power flexible direct current outgoing system and fault ride-through strategy |
| CN110867884A (en) * | 2019-11-18 | 2020-03-06 | 西安西电电力系统有限公司 | Energy consumption module, offshore wind power flexible direct current delivery system and fault ride-through strategy |
| CN111509754B (en) * | 2020-03-23 | 2021-11-05 | 广东电网有限责任公司电网规划研究中心 | Fault ride-through control method for offshore wind power direct current collecting and conveying system |
| CN111509754A (en) * | 2020-03-23 | 2020-08-07 | 广东电网有限责任公司电网规划研究中心 | Fault ride-through control method for offshore wind power direct current collecting and conveying system |
| CN111555334A (en) * | 2020-04-15 | 2020-08-18 | 南京南瑞继保电气有限公司 | Active discharge method and control device for high-voltage direct-current cable and electronic equipment |
| CN112290526A (en) * | 2020-09-18 | 2021-01-29 | 清华大学 | Direct current collector used as offshore wind power energy management hub |
| CN113708361A (en) * | 2021-07-22 | 2021-11-26 | 广东电网有限责任公司阳江供电局 | Parallel direct current system sharing direct current energy consumption device |
| CN113708361B (en) * | 2021-07-22 | 2024-02-13 | 广东电网有限责任公司阳江供电局 | Parallel direct current system sharing direct current energy consumption device |
| CN113708654A (en) * | 2021-07-27 | 2021-11-26 | 华北电力大学 | Flexible direct-current converter valve integrating surplus power dissipation function and control method |
| CN113675875A (en) * | 2021-09-06 | 2021-11-19 | 国网江苏省电力有限公司电力科学研究院 | Direct current engineering complete set energy consumption device and control system thereof |
| CN113675875B (en) * | 2021-09-06 | 2024-02-20 | 国网江苏省电力有限公司电力科学研究院 | Complete energy consumption device for direct current engineering and control system thereof |
| CN114094577B (en) * | 2021-11-25 | 2023-11-17 | 中国三峡建工(集团)有限公司 | Coordination and cooperation method for stability control and energy consumption devices of offshore wind power delivery system |
| CN114094577A (en) * | 2021-11-25 | 2022-02-25 | 中国三峡建工(集团)有限公司 | Coordination method for stability control and energy consumption device of offshore wind power output system |
| CN117439394A (en) * | 2023-10-25 | 2024-01-23 | 南方电网科学研究院有限责任公司 | Energy self-balancing flexible direct current converter valve, control method and direct current system |
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