CN103986130A - 800 kV HVDC line protection system of wind electricity connecting alternating-current/direct-current parallel-serial power grid - Google Patents
800 kV HVDC line protection system of wind electricity connecting alternating-current/direct-current parallel-serial power grid Download PDFInfo
- Publication number
- CN103986130A CN103986130A CN201410187507.2A CN201410187507A CN103986130A CN 103986130 A CN103986130 A CN 103986130A CN 201410187507 A CN201410187507 A CN 201410187507A CN 103986130 A CN103986130 A CN 103986130A
- Authority
- CN
- China
- Prior art keywords
- protection
- voltage
- current
- differential
- configuration
- 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
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses an 800 kV HVDC line protection system of a wind electricity connecting alternating-current/direct-current parallel-serial power grid. The system comprises main protection configuration and backup protection configuration. According to the main protection configuration, traveling wave transient state quantity protection and differential under-voltage protection are used, the differential under-voltage protection is achieved through detected voltage differential values and the voltage amplitude level and is main protection of a direct-current power transmission line, and meanwhile the differential under-voltage protection is used as backup of the traveling wave protection. According to the backup protection configuration, low-voltage protection and longitudinal-connecting current differential protection are included, the low-voltage protection is used for removing high-resistance fault due to which the traveling wave protection and the differential under-voltage protection cannot be operated, and action is achieved before the current differential protection. The purpose of power grid safe and stable operation under the situation that large-scale wind electricity is connected into the alternating-current/direct-current parallel-serial power grid is achieved.
Description
Technical field
The present invention relates to wind-powered electricity generation field, particularly, relate to a kind of consider large-scale wind power access AC-DC hybrid power grid ± 800kV HVDC route protection system.
Background technology
At present; the large-scale wind electricity base majority that China's wind-powered electricity generation produces after entering the large-scale development stage is positioned at " three northern areas of China " (northwest, northeast, North China); large-scale wind electricity base is generally away from load center, and its electric power need to be transported to load center and dissolve through long-distance, high voltage.Due to intermittence, randomness and the fluctuation of wind-resources, cause the wind-powered electricity generation in large-scale wind power base to be exerted oneself fluctuation in a big way can occur thereupon, further cause the fluctuation of electric power transmission network trend, bring series of problems to safe operation of electric network.
By in February, 2014, the installed capacity of Gansu Power Grid grid connected wind power has reached 7,020,000 kilowatts, accounts for 21% of Gansu Power Grid total installation of generating capacity, becomes the second largest main force power supply that is only second to thermoelectricity.Along with the improving constantly of wind-electricity integration scale, operation that 750kV ultrahigh-voltage alternating-current is sent circuit outside and Jiuquan-Zhuzhou ± 800kV extra-high voltage direct-current are sent the reply of circuit outside, the new forms of energy development model that ten million multikilowatt wind-powered electricity generation base, Jiuquan is extensive by starting, high concentrates, remote, ultrahigh-voltage alternating-current is combined conveying with extra-high voltage direct-current.Due to the fluctuation of large-scale wind power, in wind power system, introduce a large amount of power electronic device, while making fault, transient process is more complicated, and this makes the fault signature that relaying protection system faces that marked change occur.Hexi Corridor 750kV electrical network is as wind-powered electricity generation Transmission Corridor; except power supply has fluctuation feature; due to will adopt ± 800kV extra-high voltage direct-current transmission technology; it also has the feature of AC-DC hybrid power grid; the power electronic equipment that extra-high voltage direct-current transmission is introduced makes power network electricity transmission line fault transient process more complicated; duration is longer, and harmonic content is abundant, will relaying protection be brought to the impact of can not ignore.Therefore need the AC-DC hybrid power grid relaying protection problem of large-scale wind power access to analyse in depth research, especially need the protection allocation plan of the transmission line of studying each electric pressure, ensure power network safety operation.
Summary of the invention
In electrical network; ± 800kV DC transmission system current conversion station is connected with Jiuquan 750kV transformer station; one end is connected with Hunan Electric Grid; there is extensive wind energy access in 750kV Jiuquan transformer station; from DC Line Fault signature analysis; direct current transmission line fault feature is not subject to the impact of the extensive wind energy of electrical network access, identical with conventional high-tension direct current transmission line fault feature, so protection of direct current supply line arrangements is identical with current traditional direct current transportation protection configuration.The protection of utmost point equipment should arrange by extremely independent, and configures independently measuring equipment; Bipolar shared device adopts bipolar protection, and each extremely all has the bipolar protection in a set of employing independent measurement loop.
The object of the invention is to, for the problems referred to above, propose a kind of 800kV HVDC route protection system of wind-powered electricity generation access AC-DC hybrid power grid, to realize the advantage that ensures power network safety operation.
For achieving the above object, the technical solution used in the present invention is:
A 800kV HVDC route protection system for wind-powered electricity generation access AC-DC hybrid power grid, described system configuration is as follows:
Main protection configuration: adopt row ripple transient based protection and differential under-voltage protection; Differential under-voltage protection relies on and detects voltage derivative numerical value and voltage magnitude level realization protection, is the main protection of DC power transmission line, and the while is as the standby of traveling-wave protection;
Backup protection configuration: under-voltage protection and current comparison pilot protection, under-voltage protection is failed the high resistive fault of action for excising row ripple and differential under-voltage protection, moves before current differential protection.
Further, described main protection configuration, also configuration is long apart from DC power transmission line distance protection.
Technical scheme of the present invention has following beneficial effect:
Technical scheme of the present invention; by the carrying out of 800kV line system reasonably configured; technical scheme to each protection stage is carried out reasonable distribution, has reached the object that ensures power network safety operation in the situation that of large-scale wind power access AC-DC hybrid power grid.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Brief description of the drawings
Fig. 1 is ± 800kV protection of direct current supply line Trip Logic figure.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
A 800kV HVDC route protection system for wind-powered electricity generation access AC-DC hybrid power grid, system configuration is as follows:
Main protection configuration: adopt row ripple transient based protection and differential under-voltage protection; Differential under-voltage protection relies on and detects voltage derivative numerical value and voltage magnitude level realization protection, is the main protection of DC power transmission line, and the while is as the standby of traveling-wave protection;
Backup protection configuration: under-voltage protection and current comparison pilot protection, under-voltage protection is failed the high resistive fault of action for excising row ripple and differential under-voltage protection, moves before current differential protection.
Main protection configuration, also configuration is long apart from DC power transmission line distance protection.
Main protection configuration: adopt row ripple transient based protection and differential under-voltage protection; Differential under-voltage protection relies on and detects voltage derivative numerical value and voltage magnitude level realization protection, is the main protection of DC power transmission line, the double standby of doing traveling-wave protection; Preferred disposition length is apart from DC power transmission line distance protection.
Backup protection configuration: under-voltage protection and current comparison pilot protection; Under-voltage protection is failed the high resistive fault of action for excising row ripple and differential under-voltage protection, before current differential protection, moves.
± 800kV protection of direct current supply line Trip Logic as shown in Figure 1.
Logical symbol in literary composition adopt or door and with door.
HVDC(high voltage direct current transmission) be the technology that ABB developed before more than 50 year, be intended to improve the efficiency of long distance power transmission.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. a 800kV HVDC route protection system for wind-powered electricity generation access AC-DC hybrid power grid, is characterized in that, described system configuration is as follows:
Main protection configuration: adopt row ripple transient based protection and differential under-voltage protection; Differential under-voltage protection relies on and detects voltage derivative numerical value and voltage magnitude level realization protection, is the main protection of DC power transmission line, and the while is as the standby of traveling-wave protection;
Backup protection configuration: under-voltage protection and current comparison pilot protection, under-voltage protection is failed the high resistive fault of action for excising row ripple and differential under-voltage protection, moves before current differential protection.
2. the 800kV HVDC route protection system of wind-powered electricity generation access AC-DC hybrid power grid according to claim 1, is characterized in that, described main protection configuration, and also configuration is long apart from DC power transmission line distance protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187507.2A CN103986130A (en) | 2014-05-06 | 2014-05-06 | 800 kV HVDC line protection system of wind electricity connecting alternating-current/direct-current parallel-serial power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410187507.2A CN103986130A (en) | 2014-05-06 | 2014-05-06 | 800 kV HVDC line protection system of wind electricity connecting alternating-current/direct-current parallel-serial power grid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103986130A true CN103986130A (en) | 2014-08-13 |
Family
ID=51277998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410187507.2A Pending CN103986130A (en) | 2014-05-06 | 2014-05-06 | 800 kV HVDC line protection system of wind electricity connecting alternating-current/direct-current parallel-serial power grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103986130A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449648A (en) * | 2015-11-19 | 2016-03-30 | 南方电网科学研究院有限责任公司 | Optimization method for traveling wave protection characteristic quantity floating threshold of extra-high voltage direct current line |
| CN107026431A (en) * | 2017-03-13 | 2017-08-08 | 全球能源互联网研究院 | The fault detection method and device of region AC/DC interconnected system |
| CN110492452A (en) * | 2019-09-10 | 2019-11-22 | 许昌许继软件技术有限公司 | A kind of DC distribution net differential protecting method, system and spacer units |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202840496U (en) * | 2012-10-16 | 2013-03-27 | 成都讯易达通信设备有限公司 | Wind electricity grid relay protection device |
-
2014
- 2014-05-06 CN CN201410187507.2A patent/CN103986130A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202840496U (en) * | 2012-10-16 | 2013-03-27 | 成都讯易达通信设备有限公司 | Wind electricity grid relay protection device |
Non-Patent Citations (4)
| Title |
|---|
| CHEN SHILONG: "Distance Protection Scheme with Travelling Wave", 《ELECTRIC UTILITY DEREGULATION AND RESTRUTURING AND POWER TECHNOLOGIES》 * |
| 何世恩等: "大规模风电接入对继电保护的影响与策略", 《电力***保护与控制》 * |
| 宋国兵等: "高压直流输电线路继电保护技术综述", 《电力***自动化》 * |
| 崔运海等: "风电场接入***继电保护配置方案研究", 《吉林电力》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449648A (en) * | 2015-11-19 | 2016-03-30 | 南方电网科学研究院有限责任公司 | Optimization method for traveling wave protection characteristic quantity floating threshold of extra-high voltage direct current line |
| CN105449648B (en) * | 2015-11-19 | 2019-02-12 | 南方电网科学研究院有限责任公司 | Optimization method for traveling wave protection characteristic quantity floating threshold of extra-high voltage direct current line |
| CN107026431A (en) * | 2017-03-13 | 2017-08-08 | 全球能源互联网研究院 | The fault detection method and device of region AC/DC interconnected system |
| CN107026431B (en) * | 2017-03-13 | 2019-01-08 | 全球能源互联网研究院有限公司 | The fault detection method and device of region AC/DC interconnected system |
| CN110492452A (en) * | 2019-09-10 | 2019-11-22 | 许昌许继软件技术有限公司 | A kind of DC distribution net differential protecting method, system and spacer units |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | VSCs-HVDC may improve the Electrical Grid Architecture in future world | |
| Liang et al. | HVDC transmission and its potential application in remote communities: Current practice and future trend | |
| CN104009452A (en) | Protection scheme for direct current distribution system short-circuit fault | |
| Emhemed et al. | The effectiveness of using IEC61660 for characterising short-circuit currents of future low voltage DC distribution networks | |
| CN105743113A (en) | Multi-infeed direct-current transmission system harmonic instability judgment method | |
| CN103986130A (en) | 800 kV HVDC line protection system of wind electricity connecting alternating-current/direct-current parallel-serial power grid | |
| CN103855708A (en) | Ground wire energy-extracting power supplying technology of high-tension overhead line | |
| Javid et al. | Future Distribution Networks: A Review | |
| CN103986131A (en) | 750 kV line protection system of wind electricity connecting alternating-current/direct-current parallel-serial power grid | |
| Farooq et al. | A Reliable Approach to Protect and Control of Wind Solar Hybrid DC Microgrids | |
| CN108614168A (en) | Generating field current transformer total power test method | |
| CN107370165B (en) | Method for calculating three-phase unbalance degree in design phase of photovoltaic power station access system | |
| CN102882393B (en) | Power supply device for converter valve of static VAR generator | |
| CN203084143U (en) | Island detection apparatus of photovoltaic grid-connected power generation system | |
| Son et al. | Islanding detection in DC network | |
| Khurshid et al. | Geomagnetic induced current measurement in hybrid PV-wind system transformers | |
| Yagoub et al. | Modelling and fault protection analysis of a DC microgrid using voltage source converter (VSC) | |
| CN105006812A (en) | Relay protection configuration apparatus based on small power supply access system | |
| CN203983813U (en) | A kind of 35kV combined transformer for photovoltaic generation | |
| CN205039532U (en) | Relay protection disposes device based on little electric access system | |
| Zou et al. | Directional pilot protection method for distribution grid with DG | |
| Xinze et al. | DC transformer requirements and fault operation analysis in PV medium voltage DC power collection system | |
| CN104682376A (en) | Direct current microgrid control system | |
| CN202798012U (en) | Novel grid-connection system | |
| Diaconu et al. | State of the Art of Hybrid AC-DC Medium Voltage Grids |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140813 |
|
| RJ01 | Rejection of invention patent application after publication |