CN104505852A - Isolated island operating device for ultrahigh-voltage direct-current transmission line - Google Patents
Isolated island operating device for ultrahigh-voltage direct-current transmission line Download PDFInfo
- Publication number
- CN104505852A CN104505852A CN201410751455.7A CN201410751455A CN104505852A CN 104505852 A CN104505852 A CN 104505852A CN 201410751455 A CN201410751455 A CN 201410751455A CN 104505852 A CN104505852 A CN 104505852A
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- China
- Prior art keywords
- isolated island
- direct current
- special purpose
- manual
- transit
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- 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.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
- H02J2003/365—Reducing harmonics or oscillations in HVDC
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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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]
Abstract
The invention relates to the technical field of power transmission, and particularly relates to an isolated island operating device for an ultrahigh-voltage direct-current transmission line. The isolated island operating device comprises a special device for a switch station isolated island and a special device for a plant isolated island, wherein PLCs (Programmable Logic Controllers) are respectively arranged inside the special device for the switch station isolated island and the special device for the plant isolated island; the special device for the switch station isolated island is connected with a current convertor station and is connected with the special device for the plant isolated island by interacting signals; the special device for the plant isolated island is connected with a speed regulator control cabinet. The invention provides a corresponding isolated island operating device matched with an isolated island during operation and arranged on a power supply station side, and the device can be rapidly switched when double direct-current poles are closed in an isolated island operation mode, so that unbalance between output power of a generator set and transmission power of a direct-current system can be rapidly eliminated.
Description
Technical field
The present invention relates to a kind of technical field of electric power transmission, particularly relate to a kind of islet operation device of extra high voltage direct current transmission line.
Background technology
Extra high voltage direct current transmission line, except networking operation, have also been devised isolated island mode run, in order to avoid power transfer during Chu Sui DC Line Fault, reduce the impact on AC network, simplify the configuration of Chu Sui direct current stable system and improve cloud electricity ability to send outside, Net Frame of Electric Network planning and designing determine relatively independent sending end decoupled mode using as a kind of normal operating mode during Chu Sui DC operation.Under decoupled mode, have larger difference as under side, the power station frequency and voltage control strategy of sending end and networking operation mode, the parameter of the systems such as corresponding speed governing, excitation should switch.
When DC transmission system transfers decoupled mode to, different from networking operation mode, under decoupled mode, sending end frequency, voltage cannot rely on unit in net jointly to regulate, and unit self-regulation and direct current frequency can only be relied on to control.Generally, because power plant is away from current conversion station, under direct current decoupled mode, sending end electrical network is very weak, and effective short circuit ratio is very low, the fault of ac and dc systems in islanded system, all likely causes sending unstability; In DC bipolar block situation, overvoltage problem is also very outstanding, threatens current conversion station and power station main equipment safety, easily produces unbalanced phenomenon between generating set power output and direct current system through-put power.
Summary of the invention
(1) technical problem that will solve
The object of this invention is to provide a kind ofly can to stablize, the direct current islet operation device of the extra high voltage direct current transmission line of safe operation.
(2) technical scheme
The present invention is achieved by the following technical solutions:
An islet operation device for extra high voltage direct current transmission line, described islet operation device comprises switchyard isolated island special purpose device and factory building isolated island special purpose device, is respectively equipped with PLC in described switchyard isolated island special purpose device and factory building isolated island special purpose device; Described switchyard isolated island special purpose device is connected with current conversion station, and is connected by interactive signal between this switchyard isolated island special purpose device with factory building isolated island special purpose device; Described factory building isolated island special purpose device is connected with speed regulator control cubicle.
Wherein, optical fiber transmission signal is adopted between this switchyard isolated island special purpose device and factory building isolated island special purpose device.By adopting optical fiber transmission signal, long range signals process have good rapidity and reliability.
Further, the two ends for the optical fiber of signal transmission are provided with two-way communication supervising device.Can the fault that occurs of Timeliness coverage contact by two-way communication supervising device, ensure the stable operation of islet operation device, avoid potential hidden danger.
Further, switchyard isolated island special purpose device and factory building isolated island special purpose device all adopt two cover PLC dual redundant configuration, reduce the fault time of isolated island special purpose device.
Wherein, described switchyard isolated island special purpose device is connected with stable control device with direct current stoppage in transit signal by isolated island mode signal, networking mode signal, makes islet operation device accurately judge DC operation mode and running status.
Preferably, described direct current stoppage in transit signal adopts 3S output of pulse signal, ensures distance and the accuracy of Signal transmissions.
Further, described factory building isolated island special purpose device is provided with Non-follow control loop.Facilitate the maintenance of isolated island special purpose device automatic loop, and under ensureing the extreme case lost efficacy at automatic loop, isolated island special purpose device still can play a role.
Wherein, described Non-follow control loop comprises and manually throws networking/isolated island loop and manual direct current stoppage in transit loop.
Further, described manual throwing networking/isolated island loop is provided with manual/auto handle, manually throws networking pressing plate and manual throwing isolated island pressing plate; When described manual/auto handle switches to manual position, the island mode and locking automatic switching is networked/thrown, guarantees manually to throw networking and throws the normal operation of island mode and easy and simple to handle.
Further, described manual direct current stoppage in transit loop is provided with manual direct current stoppage in transit unlock button, manual direct current stoppage in transit button and manual direct current stoppage in transit pressing plate; Press manual direct current stoppage in transit unlock button and manual direct current stoppage in transit button at the same time, and under the prerequisite of manual direct current stoppage in transit pressing plate input, manual direct current stoppage in transit signal just can be sent.This technical scheme can facilitate the operation of manual direct current stoppage in transit pattern, can avoid again the generation of misoperation.
(3) beneficial effect
Compare with product with prior art, the present invention has the following advantages:
The invention provides side, power station and the corresponding islet operation device coordinating decoupled mode is set, under decoupled mode, machine can be cut fast during DC bipolar block, eliminate the imbalance between generating set power output and direct current system through-put power fast.
Accompanying drawing explanation
Fig. 1 is internal configurations and the johning knot composition of islet operation device of the present invention;
Fig. 2 is the Signal transmissions schematic diagram of stable control device of the present invention and islet operation device;
Fig. 3 is manual throwing networking/isolated island circuit diagram of the present invention;
Fig. 4 is manual direct current stoppage in transit circuit diagram of the present invention.
Mark in figure: the manual/auto handle of 1-; 2-manually throws networking pressing plate; 3-throws networking repeater; 4-throws isolated island repeater; 5-manually throws isolated island pressing plate; 6-manual direct current stoppage in transit unlock button; 7-manual direct current stoppage in transit button; 8-manual direct current stoppage in transit pressing plate; 9-manual direct current stoppage in transit repeater.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the present invention, below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail.
As shown in Figure 1, the present embodiment provides a kind of islet operation device of extra high voltage direct current transmission line, comprise interconnective switchyard isolated island special purpose device and factory building isolated island special purpose device, programmable logic controller (PLC) (ProgrammableLogic Controller, PLC) is respectively equipped with in described switchyard isolated island special purpose device and factory building isolated island special purpose device; Switchyard isolated island special purpose device is connected with current conversion station, and is connected by interactive signal between this switchyard isolated island special purpose device with factory building isolated island special purpose device; Factory building isolated island special purpose device is connected with speed regulator control cubicle.Power transmission electric network is provided with islet operation device, speed regulator regulator cubicle in actuator is regulated and controled, and control device with the isolated island discriminating gear in current conversion station, current conversion station pole and stable control device cooperatively interacts, under decoupled mode, by the control of PLC, networking can be switched during DC bipolar block fast change with the operational mode of isolated island, imbalance between quick elimination generating set power output and direct current system through-put power, ensure that the stability and safety of direct current isolated island transmission line is run.
Wherein, optical fiber transmission signal is adopted between this switchyard isolated island special purpose device and factory building isolated island special purpose device.Although adopt traditional relay electrical interface mode simply, easily to realize.But due to general about 1000 meters of air line distance between switchyard isolated island special purpose device and factory building isolated island special purpose device, long range signals process adopts optical fiber interface mode comparatively better in rapidity and reliability in electrical interface mode, therefore adopt optical fiber interface between device.Optical fiber interface is adopted to have following functions:
(1) rapidity.Under optical fiber interface mode, the speed of Signal transmissions is compared traditional relay electrical interface mode and is improved a lot, the time that signal transmits in a fiber almost can be ignored, the speed of handshaking was decided by the program execution cycle in optical fiber terminal device, the isolated island special purpose device in power station adopts PLC mode treatment, affect by processing signals mechanism between PLC self scan period and PLC, the real time is within 300-500ms.The raising of signaling rate ensure that actuator can make response to order faster, in case of emergency can ensure the stable operation of main equipment to greatest extent.
(2) reliability.Adopt optical fiber interface mode, handshaking has been come by the transmission of light signal, the generation that the impact that can not be subject to external electromagnetic interference causes signal to be made mistakes, and antijamming capability is compared traditional relay electrical interface mode and greatly improved.And fiber optic communication protocol has the real-time verifying function to signal, the data that can receive each frame while Received signal strength carry out the verification of data correctness, the misdata determined is rejected, ensure that the correctness of signal transmission, effectively preventing the actuator's misoperation caused because receiving wrong signal.
Further, the optical fiber two ends for signal transmission between switchyard isolated island special purpose device and factory building isolated island special purpose device are provided with two-way communication supervising device.The possibility of relay tip fault is there is in traditional relay electrical interface mode in equipment running process, owing to effectively can not monitor the contact loop of relay, once contact break down can not by Timeliness coverage, only have when command signal can not correctly perform by the time and just can be found, this can bring potential hidden danger to the stable operation of system.If adopt optical fiber interface mode, the two-way communication supervising device that optical fiber two ends are arranged can monitor the bidirectional communication state of optical fiber simultaneously, once communication goes wrong, in time by Power Station Monitored Control System fault alarm notice operation maintenance personnel, troubleshooting can be carried out in time.
Wherein, switchyard isolated island special purpose device and factory building isolated island special purpose device all adopt two cover PLC dual redundant configuration, preferably adopt hot standby optical fiber to realize hot backup redundancy, reduce the fault time of device between two cover PLC of each isolated island special purpose device.
As shown in Figure 2, the stable control device of two covers that current conversion station is provided with, comprises stable control device A and stable control device B, is connected respectively with described switchyard isolated island special purpose device signal.The operational mode of extra-high voltage DC transmission system and running status differentiate primarily of isolated island discriminating gear, gather Line Flow and current conversion station circuit breaker position information, the information that comprehensive conveying power station, receiving station device are transmitted, judge DC operation mode and running status, and be sent to current conversion station pole control device and stable control device with the form of switching value, again signal is transmitted to islet operation device by stable control device.Wherein, switchyard isolated island special purpose device is connected with the stable control device in current conversion station with direct current stoppage in transit signal by isolated island mode signal, networking mode signal.
For isolated island mode signal and networking mode signal, when the mode that switchyard isolated island special purpose device receives the stable control device of two covers all effectively and consistent time, then take which; The mode receiving a set of stable control device when switchyard isolated island special purpose device is effective, another set of invalid time, then get effective mode; When switchyard isolated island special purpose device receive the mode of the stable control device of two covers all effective but inconsistent time, or when the mode of the stable control device of two covers is all invalid, sending out alarm signal also needs manual confirmation mode.
For direct current stoppage in transit signal, often overlap the stable control device in power station and all export the output of " direct current stoppage in transit " contact, adopt unit to put contact and export.Adopt unit to put contact to export, preferably export and adopt 3S pulse signal.Namely the direct current stoppage in transit signal that switchyard isolated island special purpose device receives any a set of stability control equipment thinks that direct current stoppage in transit signal is effective.
As shown in Figure 3 and Figure 4, the work of isolated island debugging test is coordinated for convenience of side, power station, facilitate the maintenance of isolated island special purpose device automatic loop, and under ensureing the extreme case lost efficacy at automatic loop, isolated island special purpose device still can play a role, power station isolated island special purpose device have also been devised the manual loop be made up of pure relay circuit, is positioned at factory building isolated island special purpose device.Factory building isolated island special purpose device is provided with Non-follow control loop.Further, this Non-follow control loop comprises and manually throws networking/isolated island loop and manual direct current stoppage in transit loop.Specifically as shown in Figure 3, manually throw networking/isolated island loop to be provided with manual/auto handle 1, manually to throw networking pressing plate 2, manually throwing isolated island pressing plate 5, to throw networking repeater 3 and throw isolated island repeater 4; When described manual/auto handle 1 switches to manual position, simultaneously locking automatic switching is networked/throws the operational mode of isolated island, manually throws networking pressing plate 2 by pressing and manually throws isolated island pressing plate 5, thus Non-follow control throws the operational mode of networking/throw isolated island.
Wherein, specifically as shown in Figure 4, manual direct current stoppage in transit loop is provided with the manual direct current stoppage in transit repeater 9 of manual direct current stoppage in transit unlock button 6, manual direct current stoppage in transit button 7 and manual direct current stoppage in transit pressing plate 8 and series connection; For preventing misoperation, only having and pressing manual direct current stoppage in transit unlock button 6 and manual direct current stoppage in transit button 7 at the same time, and under the prerequisite of manual direct current stoppage in transit pressing plate 8 input, manual direct current stoppage in transit signal just can be sent.
This islet operation device can be connected with Power Station Monitored Control System.Be networked to isolated island mode switch or isolated island switches to networking mode time, Power Station Monitored Control System makes power station automatically exit automatic generation control (automaticgeneration control, AGC) pattern, make side, power station automatism voltage control (automatic voltagecontrol, AVC) normal pressure regulation coefficient automatically switches, and manually can exit power system stabilizer, PSS (power system stabilization, PSS) pattern; Under decoupled mode during direct current stoppage in transit signal, power station is made automatically to exit agc mode.After switchyard isolated island special purpose device receives signal, time and factory building isolated island special purpose device send signal time, are all automatically recorded to Power Station Monitored Control System, facilitate emergency review.Be networked to isolated island mode to switch or isolated island automatically exits power station scheduling AGC function and controls when networking mode switches, AVC normal pressure regulation coefficient in side, power station automatically switches, and PSS function manually exits.Automatically voe station scheduling AGC function is exited during direct current stoppage in transit signal under decoupled mode.
Above embodiment is only one embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.Its concrete structure and size can adjust according to actual needs accordingly.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (10)
1. the islet operation device of an extra high voltage direct current transmission line, it is characterized in that, described islet operation device comprises switchyard isolated island special purpose device and factory building isolated island special purpose device, is respectively equipped with PLC in described switchyard isolated island special purpose device and factory building isolated island special purpose device; Described switchyard isolated island special purpose device is connected with current conversion station, and is connected by interactive signal between this switchyard isolated island special purpose device with factory building isolated island special purpose device; Described factory building isolated island special purpose device is connected with speed regulator control cubicle.
2. the islet operation device of extra high voltage direct current transmission line according to claim 1, is characterized in that, adopts optical fiber transmission signal between this switchyard isolated island special purpose device and factory building isolated island special purpose device.
3. the islet operation device of extra high voltage direct current transmission line according to claim 2, is characterized in that, the two ends for the optical fiber of signal transmission are provided with two-way communication supervising device.
4. the islet operation device of extra high voltage direct current transmission line according to claim 1, is characterized in that, switchyard isolated island special purpose device and factory building isolated island special purpose device all adopt two cover PLC dual redundant configuration.
5. the islet operation device of extra high voltage direct current transmission line according to claim 1, is characterized in that, described switchyard isolated island special purpose device is connected with stable control device with direct current stoppage in transit signal by isolated island mode signal, networking mode signal.
6. the islet operation device of extra high voltage direct current transmission line according to claim 5, is characterized in that, described direct current stoppage in transit signal adopts 3S output of pulse signal.
7. the islet operation device of the extra high voltage direct current transmission line according to any one of claim 1 ~ 6, is characterized in that, described factory building isolated island special purpose device is provided with Non-follow control loop.
8. the islet operation device of extra high voltage direct current transmission line according to claim 7, is characterized in that, described Non-follow control loop comprises manually throws networking/isolated island loop and manual direct current stoppage in transit loop.
9. the islet operation device of extra high voltage direct current transmission line according to claim 8, is characterized in that, described manual throwing networking/isolated island loop is provided with manual/auto handle, manually throws networking pressing plate and manual throwing isolated island pressing plate; When described manual/auto handle switches to manual position, the island mode and locking automatic switching is networked/thrown.
10. the islet operation device of extra high voltage direct current transmission line according to claim 8, is characterized in that, described manual direct current stoppage in transit loop is provided with manual direct current stoppage in transit unlock button, manual direct current stoppage in transit button and manual direct current stoppage in transit pressing plate; Press manual direct current stoppage in transit unlock button and manual direct current stoppage in transit button at the same time, and under the prerequisite of manual direct current stoppage in transit pressing plate input, manual direct current stoppage in transit signal just can be sent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410751455.7A CN104505852A (en) | 2014-12-09 | 2014-12-09 | Isolated island operating device for ultrahigh-voltage direct-current transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410751455.7A CN104505852A (en) | 2014-12-09 | 2014-12-09 | Isolated island operating device for ultrahigh-voltage direct-current transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104505852A true CN104505852A (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410751455.7A Pending CN104505852A (en) | 2014-12-09 | 2014-12-09 | Isolated island operating device for ultrahigh-voltage direct-current transmission line |
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| CN (1) | CN104505852A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9997956B1 (en) | 2017-02-23 | 2018-06-12 | Siemens Industry, Inc. | Systems, apparatus, and methods for automatic generation control islanded operation |
| CN109713664A (en) * | 2019-01-10 | 2019-05-03 | 清华大学 | The net source coordination control strategy calculation method and system of direct current isolated island frequency stabilization |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3883790A (en) * | 1973-02-14 | 1975-05-13 | Asea Ab | Direct current power transmission |
| CN102593857A (en) * | 2012-03-05 | 2012-07-18 | 南京南瑞继保电气有限公司 | Method for configuring multiport direct-current transmission control system |
-
2014
- 2014-12-09 CN CN201410751455.7A patent/CN104505852A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3883790A (en) * | 1973-02-14 | 1975-05-13 | Asea Ab | Direct current power transmission |
| CN102593857A (en) * | 2012-03-05 | 2012-07-18 | 南京南瑞继保电气有限公司 | Method for configuring multiport direct-current transmission control system |
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| 吴林平等: "高压直流工程中交直流系统协调控制接口方式", 《南方电网技术》 * |
| 曹一凡等: "小湾水电站计算机监控系统结构及特点", 《水力发电》 * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9997956B1 (en) | 2017-02-23 | 2018-06-12 | Siemens Industry, Inc. | Systems, apparatus, and methods for automatic generation control islanded operation |
| CN109713664A (en) * | 2019-01-10 | 2019-05-03 | 清华大学 | The net source coordination control strategy calculation method and system of direct current isolated island frequency stabilization |
| CN109713664B (en) * | 2019-01-10 | 2021-01-15 | 清华大学 | Network source coordination control strategy calculation method and system with stable direct current island frequency |
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| Date | Code | Title | Description |
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| ASS | Succession or assignment of patent right |
Owner name: XIAOWAN HYDROPOWER PLANT OF HUANENG LANCANG RIVER Free format text: FORMER OWNER: HUANENG LANTSANG HYDROELECTRIC CO., LTD. Effective date: 20150330 |
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| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 650214 KUNMING, YUNNAN PROVINCE TO: 675702 DALI BAI AUTONOMOUS PREFECTURE, YUNNAN PROVINCE |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20150330 Address after: 675702 Xiaowan power plant, Xiaowan Town, Nanjian County, Dali, Yunnan Applicant after: XIAOWAN HYDROPOWER STATION, HUANENG LANCANG RIVER HYDROPOWER CO., LTD. Address before: 650214, No. 1, Century City Road, Guandu District, Yunnan, Kunming Applicant before: Huaneng Lancang River Hydropower Co., Ltd. |
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Application publication date: 20150408 |