CN202872352U - Converter valve locking device based on flexible direct current transmission system - Google Patents
Converter valve locking device based on flexible direct current transmission system Download PDFInfo
- Publication number
- CN202872352U CN202872352U CN 201220565367 CN201220565367U CN202872352U CN 202872352 U CN202872352 U CN 202872352U CN 201220565367 CN201220565367 CN 201220565367 CN 201220565367 U CN201220565367 U CN 201220565367U CN 202872352 U CN202872352 U CN 202872352U
- Authority
- CN
- China
- Prior art keywords
- transmission system
- current
- power transmission
- alternating current
- bus
- 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.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 58
- 230000001681 protective effect Effects 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000009191 jumping Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
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
- Direct Current Feeding And Distribution (AREA)
Abstract
The utility model provides a transverter valve blocking device based on flexible direct current transmission system, include: the alternating current switch jump point, the alternating current out-of-limit point and the alternating current bus protection point are connected; the alternating current switch jumping contact, the alternating current out-of-limit contact and the alternating current bus protection contact are all connected to an AND gate; the AND gate is connected with a system rectifying station valve module of the flexible direct current transmission system; when the alternating current switch tripping contact detects that the alternating current switch trips, the alternating current out-of-limit contact detects that the current induced by the current transformer for alternating current bus protection exceeds an over-line setting value, and the alternating current bus protection contact detects that the protection of the alternating current bus acts, the AND gate opens a potential to the system rectifying station valve module to perform the operation of locking a converter valve of the flexible direct current transmission system. Implement the utility model discloses, can protect the transverter valve intact, eliminate hidden danger, improve equipment operation function.
Description
Technical field
The utility model relates to the power technology field, relates in particular to a kind of converter valve locking device based on the flexible DC power transmission system.
Background technology
Development along with power electronic device and control technology, novel semiconductor device-igbt (Insulated Gate Bipolar Transistor has appearred, IGBT) in the application of low-voltage system, so that IGBT is as voltage source converter (the Voltage-Sourced Converter of switching device, VSC), be used widely at the industrial drives device subsequently, after repeatedly upgrading through the voltage of subsequently IGBT device and capacity again, so that using in the direct current transmission and distribution net, the voltage source converter that adopts igbt to consist of becomes a reality.
Converter adopts IGBT valve and two level (or many level) three-phase mechanism in the direct current transmission and distribution net is used, and use pulse modulation technology (Pulse Width Modulation, PWM) situation of cut-offfing of control IGBT valve, possess after the above-mentioned functions so that be different from many aspects conventional direct current transmission and distribution by its DC distribution net system that consists of, can overcome the multiclass problem that presents in the conventional direct current transmission and distribution.This novel direct current transmission and distribution technology is referred to as " flexible direct current (High Voltage Direct Current Flexible, HVDC-Flexible) ".Present flexible DC power transmission system is all take point-to-point as main, as shown in Figure 1.
Flexible direct current (HVDC-Flexible) is from conventional direct current transmission and distribution technical development, advantage is the advantage of its conventional direct current transmission and distribution, for example: the flexible direct current electric line will lack a wire than present interchange transmission and distribution network circuit in service, make its line cost low, loss is little, has saved a large amount of corridors of electric line; The flexible direct current distribution network system generally adopts cable as the distribution network system passage in order to realize less failure rate, and the transmission capacity of cable is large, loss is little, life cycle is long, fed distance is unrestricted; The flexible direct current distribution network system adopts cable as the power transmission and distribution passage, and generally at underground use directly buried technology, engineering cost is low, the duration is short, also reduces the impact on environment; In addition, the flexible direct current distribution network system is stable strong; The flexible direct current distribution network system can be realized the interconnected of asynchronous system; The active power that the flexible direct current distribution network system is carried and reactive power can independently be controlled fast; The flexible direct current distribution network system is built by separate periods, favorable expandability preferably; Fast recovery of power supply and black startup the after the accident; Can be to passive mains supply etc.
But the flexible DC power transmission system that puts into operation at present mostly is greatly double ended system, only can realize that point-to-point direct current power passes on.
The flexible DC power transmission system that puts into operation at present mostly is greatly double ended system and is divided into the harmonics district in protection.Direct current protecting district in the imaginary ellipse district and the empty square frame shown in Figure 2 district no matter be that harmonics district or direct current protecting district fault all will be carried out locking to the converter valve of current conversion station, protects as shown in Figure 2.
But in some regional fault; d point failure as shown in Figure 2; it also not in the direct current protecting district, belongs to AC system bus protection scope not in the harmonics district; d point failure AC system bus protection trips alternating-current switch; disconnect contacting of AC system and current conversion station, but after the alternating-current switch tripping operation, fault d point exists still; the major break down electric current flows to the harmonics district by the converter valve of current conversion station, flows to the fault point again.Can damage converter valve during the converter valve of major break down electric current this moment by current conversion station.
Therefore, in the urgent need to a kind of converter valve locking device of new flexible DC power transmission system, the protection converter valve is intact, avoids it is caused damage.
The utility model content
When breaking down in order to solve the flexible DC power transmission system that puts into operation at present; although protection action; but the fault point can't be excised; converter valve in the system is caused the technical problem of the serious potential safety hazard of damage; the utility model provides a kind of converter valve locking device based on the flexible DC power transmission system; it can protect converter valve intact, removes a hidden danger, and improves the equipment operation function.
A kind of converter valve locking device based on the flexible DC power transmission system that the utility model provides, the ac bus protection range that its applicable described flexible DC power transmission system comprises;
Described harmonics district comprises harmonics district Current Transformer and ac bus protective current transformer,, other electric component in harmonics district; Described direct current protecting district comprises converting plant of system valve module;
Described converter valve locking device based on the flexible DC power transmission system comprises:
Be used for being connected with the alternating-current switch of described flexible DC power transmission system, detect the alternating-current switch whether described alternating-current switch trip and jump a contact;
Be used for being connected with the ac bus protective current transformer, of described flexible DC power transmission system, detect described ac bus protective current transformer, and whether sense electric current and surpass the out-of-limit contact of alternating current of getting over the line setting value;
Be used for being connected with the ac bus of described flexible DC power transmission system, detect the ac bus whether protection of the ac bus of described flexible DC power transmission system moved and protect contact;
Described alternating-current switch jump a position contact, the out-of-limit contact of alternating current, ac bus protection contact all be connected to one with door;
Described and door are connected with described flexible DC power transmission system of systems converting plant valve module;
Jump the position contact at described alternating-current switch and detect described alternating-current switch tripping operation; the out-of-limit contact of described alternating current detects the ac bus protective current transformer, and senses electric current above getting over the line setting value; when the protection that described ac bus protection contact detects described ac bus has been moved; describedly leave current potential to converting plant of described system valve module with door, carry out the operation of the converter valve of described flexible DC power transmission system being carried out locking.
Implement the utility model, have following beneficial effect:
The utility model has solved that d shown in Figure 2 breaks down in the flexible DC power transmission system; although protection action; but the fault point can't be excised; converter valve in the system is caused the serious security hidden trouble of damage; it can excise the fault point timely; the protection converter valve is intact, eliminates safe hidden trouble, and has improved the runnability of flexible DC power transmission system.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the rough schematic of the point-to-point flexible DC power transmission system of prior art;
Fig. 2 is that rough schematic is divided in the alternating current-direct current protection of flexible DC power transmission system;
The rough schematic based on the converter valve locking device of flexible DC power transmission system that Fig. 3 provides for the utility model.
Embodiment
A kind of converter valve locking device based on the flexible DC power transmission system that the utility model provides, its applicable described flexible DC power transmission system specifically as shown in Figure 2, it comprises: AC system, alternating-current switch, ac bus, harmonics district and direct current protecting district;
Described harmonics district comprises harmonics district Current Transformer and ac bus protective current transformer,, other electric component in harmonics district; Described direct current protecting district comprises converting plant of system valve module.
As shown in Figure 3, the converter valve locking device based on the flexible DC power transmission system that provides of the utility model comprises:
Be used for being connected with the alternating-current switch of described flexible DC power transmission system, detect the alternating-current switch whether described alternating-current switch trip and jump a contact 1;
Be used for being connected with the ac bus protective current transformer, of described flexible DC power transmission system, detect described ac bus protective current transformer, and whether sense electric current and surpass the out-of-limit contact 2 of alternating current of getting over the line setting value;
Be used for being connected with the ac bus of described flexible DC power transmission system, detect the ac bus whether protection of the ac bus of described flexible DC power transmission system moved and protect contact 3;
Described alternating-current switch jump a position contact 1, the out-of-limit contact 2 of alternating current, ac bus protection contact 3 all be connected to one with door 4;
Describedly be connected with flexible DC power transmission system of systems converting plant valve module shown in Figure 2 with door 4;
Jump position contact 1 at described alternating-current switch and detect described alternating-current switch tripping operation; the out-of-limit contact 2 of described alternating current detects the ac bus protective current transformer, and senses fault current; the protection that described ac bus protection contact 3 detects described ac bus has been moved these three conditions when possessing simultaneously; describedly leave current potential to converting plant of described system valve module with door 4, carry out the operation of the converter valve of described flexible DC power transmission system being carried out locking.
Need to prove; whether described alternating-current switch is jumped the described alternating-current switch of position contact 1 detection and is tripped; the out-of-limit contact 2 of described alternating current detects the ac bus protective current transformer, and whether senses fault current; whether the protection that described ac bus protection contact 3 detects described ac bus has moved the known technology that is well known to the skilled person, and does not repeat them here.
Implement the utility model, have following beneficial effect:
The utility model has solved that the ac bus protection range breaks down in the flexible DC power transmission system; although protection action; but the fault point can't be excised; converter valve in the system is caused the serious security hidden trouble of damage; it can excise the fault point timely; the protection converter valve is intact, eliminates safe hidden trouble, and has improved the runnability of flexible DC power transmission system.
It should be noted that; a kind of product form of the converter valve locking device of the flexible DC power transmission system that is based on that the utility model is described; other satisfies the product of structure described in the utility model; not affect the factor of product performance not identical even material, device name, outward appearance, device are put sequential scheduling, still belongs to the scope of the utility model protection.
Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that implementation of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (1)
1. converter valve locking device based on the flexible DC power transmission system, described flexible DC power transmission system comprises: harmonics district, direct current protecting district and DC power transmission line;
Described harmonics district comprises harmonics district Current Transformer and ac bus protective current transformer; Described direct current protecting district comprises converting plant of system valve module;
It is characterized in that described converter valve locking device based on the flexible DC power transmission system comprises:
Be used for being connected with the alternating-current switch of described flexible DC power transmission system, detect the alternating-current switch whether described alternating-current switch trip and jump a contact;
Be used for being connected with the ac bus protective current transformer, of described flexible DC power transmission system, detect described ac bus protective current transformer, and whether sense electric current and surpass the out-of-limit contact of alternating current of getting over the line setting value;
Be used for being connected with the ac bus of described flexible DC power transmission system, detect the ac bus whether protection of the ac bus of described flexible DC power transmission system moved and protect contact;
Described alternating-current switch jump a position contact, the out-of-limit contact of alternating current, ac bus protection contact all be connected to one with door;
Described and door are connected with described flexible DC power transmission system of systems converting plant valve module;
Jump the position contact at described alternating-current switch and detect described alternating-current switch tripping operation; the out-of-limit contact of described alternating current detects the ac bus protective current transformer, and senses electric current above getting over the line setting value; when the protection that described ac bus protection contact detects described ac bus has been moved; describedly leave current potential to converting plant of described system valve module with door, carry out the operation of the converter valve of described flexible DC power transmission system being carried out locking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220565367 CN202872352U (en) | 2012-10-31 | 2012-10-31 | Converter valve locking device based on flexible direct current transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220565367 CN202872352U (en) | 2012-10-31 | 2012-10-31 | Converter valve locking device based on flexible direct current transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202872352U true CN202872352U (en) | 2013-04-10 |
Family
ID=48039041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220565367 Expired - Lifetime CN202872352U (en) | 2012-10-31 | 2012-10-31 | Converter valve locking device based on flexible direct current transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202872352U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922344A (en) * | 2021-09-29 | 2022-01-11 | 广东电网有限责任公司 | AC fault protection method, device, electronic equipment and storage medium |
-
2012
- 2012-10-31 CN CN 201220565367 patent/CN202872352U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922344A (en) * | 2021-09-29 | 2022-01-11 | 广东电网有限责任公司 | AC fault protection method, device, electronic equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103296671A (en) | Overvoltage protection device and method for alternating current side of voltage source converter high voltage direct current transmission system | |
| CN104852366B (en) | The direct-flow distribution system short trouble guard method of the current limiter containing resistive superconducting | |
| CN107294073B (en) | Control protection system of hybrid topology direct current circuit breaker | |
| CN103187722A (en) | Direct current side overvoltage protective device and method for flexible direct current transmission system | |
| CN106972479A (en) | The design method and high-low pressure dc circuit breaker of a kind of direct-current grid | |
| CN103872658A (en) | Multifunctional self-recovery over-voltage and under-voltage protector | |
| CN106026160A (en) | Distributed photovoltaic generation anti-islanding protective device | |
| CN103986128A (en) | Low-voltage side accelerated trip protection technology based on intelligent substation | |
| CN202872352U (en) | Converter valve locking device based on flexible direct current transmission system | |
| CN203166505U (en) | AC side overvoltage protection device used for flexible DC transmission system | |
| CN103001191B (en) | Bus differential protection method and system for flexible direct-current closed-loop intelligent power distribution network | |
| CN204706895U (en) | Fossil power plant auxiliary engine frequency converter high-low voltage traversing device | |
| CN203466765U (en) | Boiler air pre-heater frequency converter based on low-voltage ride-through device | |
| CN106849031B (en) | A kind of alternating current-direct current mixing micro-capacitance sensor coordinating protection fitting method | |
| CN203135401U (en) | AC invasion protection device for DC system of transformer substation | |
| CN202535046U (en) | Microcomputer monitoring and protection device for mine-used high-voltage switch | |
| CN206211547U (en) | Bipolar flexible direct current transmission system and converter station thereof | |
| CN104022492A (en) | Auxiliary short circuit protection device for low-voltage power supply device of long-distance mine laneway | |
| CN103490372A (en) | Singlechip-based leakage protector | |
| CN203014344U (en) | Non-electricity protection system of converter transformer or smoothing reactor | |
| CN202721433U (en) | Leakage protection and power supply recovery apparatus | |
| CN202978227U (en) | Mine-used magnetic starter switch microcomputer monitoring and protecting device | |
| CN203014360U (en) | On-line circuit fault monitoring and protecting device | |
| CN202930930U (en) | Transient voltage absorbing device | |
| CN206542181U (en) | Intelligent non-pressure release coil controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |