CN106169739A - A kind of flexible direct current power network line relaying configuration method and device - Google Patents
A kind of flexible direct current power network line relaying configuration method and device Download PDFInfo
- Publication number
- CN106169739A CN106169739A CN201610581725.3A CN201610581725A CN106169739A CN 106169739 A CN106169739 A CN 106169739A CN 201610581725 A CN201610581725 A CN 201610581725A CN 106169739 A CN106169739 A CN 106169739A
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- Prior art keywords
- protection
- line
- direct current
- flexible direct
- power network
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/265—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured making use of travelling wave theory
Abstract
The present invention relates to a kind of flexible direct current power network line relaying configuration method and device, belong to flexible direct current electric power network technique field.The present invention is by all laying line protection system at the two ends of flexible direct current power network line; the i.e. current conversion station in each flexible direct current power network line sending end and receiving end all configures corresponding line protection system; two-termial line protection system is the most at least configured with traveling-wave protection; and the traveling-wave protection in sending end line protection system uses anti-travelling wave signal, the traveling-wave protection in receiving end line protection system uses front travelling wave signal.The present invention by all configuring route protection at flexible direct current circuit two ends, and can use different traveling-wave protection Fault Identification principles according to the operating condition of current conversion station.Therefore there is single-end electrical quantity ultrahigh speed Fault Identification, reliability height, flexible configuration and be prone to the features such as extension, it is ensured that the ultrahigh speed identification of direct current network line fault, improve reliability and the availability of direct current network system.
Description
Technical field
The present invention relates to a kind of flexible direct current power network line relaying configuration method and device, belong to flexible direct current electric power network technique
Field.
Background technology
Along with power requirements is improved constantly by development and the user of renewable energy power generation, electric network composition faces simultaneously to be sent out
Electricity end fluctuates with the randomness of power load.Conventional AC electrical network uses reactive-load compensation burning voltage, relies on AC circuit breaker real
Existing load flow rectification, is difficult to meet renewable energy power generation and load stochastic volatility to electrical network rapid-action requirement.And it is straight
In stream electrical network, voltage source converter can limit voltage pulsation；The dc circuit breaker of electrically-based electronic technology can millisecond fraction
Power-off stream, coordinates control system can realize the quick adjustment of trend.Therefore, set up direct current network, by regenerative resource and biography
System energy wide area interconnection, can be fully to realize between various energy resources form, Multiple Time Scales, large space span, multiuser types
Complementation, be the important development direction of following electrical network.The protection of current domestic flexible direct current Guangdong power system is mainly arranged in
The transmitting terminal (sending end) of one end of circuit, usually circuit, is realized whole route protection by the sending end of circuit, and it is except gathering
Outside local terminal electric signal, also rely on interior communication, cause the reliability of route protection to reduce.Meanwhile, its route protection is adopted
Traveling-wave protection carry out accommodation not according to the operating condition of current conversion station, cause the identification certainty to line fault
Reduce.
Summary of the invention
It is an object of the invention to provide a kind of flexible direct current power network line relaying configuration method and device, the most soft to solve
The problem that property direct current network route protection Reliability comparotive is low.
The present invention solves that above-mentioned technical problem provides a kind of flexible direct current power network line relaying configuration method, this configuration
Method all configures line protection system at the two ends of flexible direct current power network line, i.e. in each flexible direct current power network line sending end and
The current conversion station of receiving end all configures corresponding line protection system, is the most at least configured with traveling-wave protection in each end line protection system,
And the traveling-wave protection in sending end line protection system uses anti-travelling wave signal, the traveling-wave protection in receiving end line protection system uses
Front travelling wave signal.
Described line protection system carries out separate configurations according to each pole, for bipolar line, pole 1 and pole 2 route protection
Realized by independent protected host.
Described line protection system uses " triple modular redundant " configuration, by " two from three " after logical judgment, believe by output protection action
Number.
Described line protection system also includes the voltage jump amount as line fault main protection and protects and transient
Protection, and low-voltage overcurrent protection, circuit under-voltage protection and the DC line longitudinal difference protection as line fault back-up protection,
Described DC line longitudinal difference protection is only effective when interior communication is normal.
The electric signal that described line protection system is gathered uses and directly adopts mode, and each flexible direct current power network line send
The protection system of end and receiving end only gathers local terminal electric signal.
Described " two from three " logic uses FPGA to realize.
Present invention also offers a kind of flexible direct current power network line relaying configuration device, it is straight that this device includes being arranged on flexibility
Stream power network line sending end and the line protection system of receiving end, the most at least include traveling-wave protection list in two-termial line protection system
Unit, and the traveling-wave protection unit of sending end uses anti-travelling wave signal to carry out traveling-wave protection, the traveling-wave protection unit of receiving end uses and moves ahead
Ripple signal carries out traveling-wave protection.
Described line protection system carries out separate configurations according to each pole, for bipolar line, pole 1 and pole 2 route protection
Realized by independent protected host.
The line protection system of described each end all uses " triple modular redundant " to configure, by " two from three " after logical judgment, protect by output
Protect actuating signal.
Each line protection system also includes the voltage jump amount protected location as line fault main protection and transient
Protected location, and low-voltage overcurrent protection unit, circuit under-voltage protection unit and the direct current as line fault back-up protection
Pilot wire relays unit, described DC line longitudinal difference protection unit is only effective when interior communication is normal.
The invention has the beneficial effects as follows: the present invention is by all laying route protection system at the two ends of flexible direct current power network line
System, i.e. the current conversion station in each flexible direct current power network line sending end and receiving end all configures corresponding line protection system, two end lines
The traveling-wave protection being the most at least configured with in traveling-wave protection, and sending end line protection system in road protection system uses anti-row ripple letter
Number, the traveling-wave protection in receiving end line protection system uses front travelling wave signal.The present invention is by equal at flexible direct current circuit two ends
Configuration route protection, and different traveling-wave protection Fault Identification principles can be used according to the operating condition of current conversion station.Therefore have
There are single-end electrical quantity ultrahigh speed Fault Identification, reliability height, flexible configuration and are prone to the features such as extension, it is ensured that unidirectional current netting twine
The ultrahigh speed identification of road fault, improves reliability and the availability of direct current network system.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of flexible direct current electric network protection ' In System Reconfiguration Method；
Fig. 2 is one pole main wiring mode route protection functional configuration schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further.
The embodiment of the present invention a kind of flexible direct current power network line relaying configuration method
The relaying configuration method of the present invention is by all laying line protection system at the two ends of flexible direct current power network line, i.e.
Current conversion station in each flexible direct current power network line sending end and receiving end is respectively provided with corresponding line protection system, each route protection system
The traveling-wave protection being the most at least configured with in system in traveling-wave protection, and sending end line protection system uses anti-travelling wave signal, by end line
Traveling-wave protection in road protection system uses front travelling wave signal.Below in conjunction with concrete example, the collocation method of the present invention is carried out
Describe in detail.
The DC line protection of the present invention configures according to pole, i.e. same by same protected host of both positive and negative polarity circuit
One board realizes；For the bipolar Ground return of half-bridge or full-bridge, half-bridge or full-bridge bipolar metallic return type main wiring mode, directly
Flow Line protection carries out separate configurations, i.e. pole 1 and pole 2 route protection according to each pole and is realized by independent protected host.This enforcement
The electric signal that in example, each protection system is gathered uses and directly adopts mode, is i.e. directly gathered the electric of local terminal by in-site measurement unit
Signal.The virtual protection of line protection system judges to use relay protective scheme board to realize, during conducting transmission line protection, and will be existing
Field measurement unit is connected directly to relay protective scheme and judges board.
In order to improve the reliability of protection, the present invention DC line protection system to configuring according to each pole uses
" triple modular redundant " configures, as it is shown in figure 1, include the protection device of three redundant configuration, the output signal of each protection device is through " three take
Two " exporting final protection act signal after logical judgment, each protection device signal is exported to two from three by quick control bus
Device, " two from three " logic of two from three device is realized by FPGA, and the fiber-optic signal of each protection device output uses IEC60044-
8 standard agreements, switching value output signal is realized by IGBT.After two from three device judges protection act outlet, pass through direct current interruption
Device or control system quickly isolate faulty line, and after a period of time, quick release recovery system is properly functioning.
DC protection system, in addition to being configured with traveling-wave protection function, is provided with the protection of voltage jump amount and transient is protected
Protecting, traveling-wave protection, the protection of voltage jump amount and transient based protection are as the main protection function of line fault.Simultaneously in order to further
Improve protection reliability, this DC protection system is also configured with the low-voltage overcurrent protection as line fault back-up protection,
Circuit under-voltage protection and DC line longitudinal difference protection.Each defencive function only gathers local terminal electric signal, is independent of interior communication,
Only DC line longitudinal difference protection is only effective when interior communication is normal.
Line protection system carries out separate configurations according to each pole, for bipolar line, pole 1 and pole 2 route protection by independence
Protected host realize.When there being new extensions circuit, only need to increase independent protection newly judges board, does not affect original protection and patrols
Volume, as in figure 2 it is shown, only need to be for the enlarging a set of independent route protection of line configuring.
The embodiment of the present invention a kind of flexible direct current power network line relaying configuration device
The flexible direct current power network line relaying configuration device of the present invention includes being arranged in flexible direct current power network line two ends
Line protection system, the i.e. current conversion station in each flexible direct current power network line sending end and receiving end are respectively provided with corresponding route protection system
System, all at least provided with traveling-wave protection unit in each line protection system, and the line protection system of sending end uses anti-row ripple letter
Number carrying out traveling-wave protection, before the line protection system of receiving end uses, travelling wave signal carries out traveling-wave protection.This configuration device concrete
Realization rate has been described in detail in the embodiment of method, repeats no more here.
Built-in industrial can be used to control platform for the collocation method of the present invention and device or PC device realizes, these two kinds dresses
Putting is the conventional device in direct current transportation field, the most specifically introduces.
To sum up, the flexible direct current power network line relaying configuration method and device that the present invention proposes is the direct current network in planning
The feasible technical scheme that engineering provides, proposes for operating various operating modes and has equipping rules targetedly
With the configuration of concrete feasible defencive function and Fault Identification principle thereof, have single-end electrical quantity ultrahigh speed Fault Identification, reliability high,
Flexible configuration and be prone to the features such as extension, it is ensured that the ultrahigh speed identification of direct current network line fault, improves direct current network system
The reliability of system and availability.
Claims (10)
1. a flexible direct current power network line relaying configuration method, it is characterised in that this collocation method is at flexible direct current grid line
The two ends on road all configure line protection system, the i.e. current conversion station in each flexible direct current power network line sending end and receiving end and all configure phase
The line protection system answered, is the most at least configured with in traveling-wave protection, and sending end line protection system in two-termial line protection system
Traveling-wave protection use anti-travelling wave signal, traveling-wave protection in receiving end line protection system use before travelling wave signal.
Flexible direct current power network line relaying configuration method the most according to claim 1, it is characterised in that described circuit is protected
Protecting system carries out separate configurations according to each pole, realizes by independent protected host for bipolar line, pole 1 and pole 2 route protection.
Flexible direct current power network line relaying configuration method the most according to claim 1, it is characterised in that described route protection
System uses " triple modular redundant " configuration, by " two from three " output protection actuating signal after logical judgment.
Flexible direct current power network line relaying configuration method the most according to claim 1, it is characterised in that described circuit is protected
Protecting system also includes the voltage jump amount as line fault main protection and protects and transient based protection, and as line fault
The low-voltage overcurrent protection of back-up protection, circuit under-voltage protection and DC line longitudinal difference protection, described DC line longitudinal difference protection
Only effective when interior communication is normal.
Flexible direct current power network line relaying configuration method the most according to claim 1, it is characterised in that described circuit is protected
The electric signal that protecting system is gathered uses and directly adopts mode, and the protection system of each flexible direct current power network line sending end and receiving end is only
Gather local terminal electric signal.
Flexible direct current power network line relaying configuration method the most according to claim 3, it is characterised in that described " three take
Two " logic uses FPGA to realize.
7. a flexible direct current power network line relaying configuration device, it is characterised in that this device includes being arranged on flexible direct current electricity
Netting twine road sending end and the line protection system of receiving end, the most at least include traveling-wave protection unit in two-termial line protection system, and
The traveling-wave protection unit of sending end uses anti-travelling wave signal to carry out traveling-wave protection, and the traveling-wave protection unit of receiving end uses front travelling wave signal
Carry out traveling-wave protection.
Flexible direct current power network line relaying configuration device the most according to claim 7, it is characterised in that described circuit is protected
Protecting system carries out separate configurations according to each pole, realizes by independent protected host for bipolar line, pole 1 and pole 2 route protection.
Flexible direct current power network line relaying configuration device the most according to claim 7, it is characterised in that the line of described each end
Road protection system all uses " triple modular redundant " to configure, by " two from three " output protection actuating signal after logical judgment.
Flexible direct current power network line relaying configuration device the most according to claim 7, it is characterised in that each route protection
System also includes the voltage jump amount protected location as line fault main protection and transient based protection unit, and as line
The low-voltage overcurrent protection unit of road fault back-up protection, circuit under-voltage protection unit and DC line longitudinal difference protection unit, institute
State DC line longitudinal difference protection unit only effective when interior communication is normal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610581725.3A CN106169739B (en) | 2016-07-22 | 2016-07-22 | A kind of flexible direct current power network line relaying configuration method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610581725.3A CN106169739B (en) | 2016-07-22 | 2016-07-22 | A kind of flexible direct current power network line relaying configuration method and device |
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| CN106169739A true CN106169739A (en) | 2016-11-30 |
| CN106169739B CN106169739B (en) | 2019-01-29 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107359600A (en) * | 2017-07-21 | 2017-11-17 | 许继集团有限公司 | A kind of station domain protecting method and device |
| CN107732881A (en) * | 2017-11-06 | 2018-02-23 | 许继电气股份有限公司 | A kind of direct current network dc circuit breaker failure protection method and apparatus |
| CN108808849A (en) * | 2017-04-28 | 2018-11-13 | 南京南瑞继保电气有限公司 | A kind of interface allocation method and system |
| CN109031034A (en) * | 2017-06-09 | 2018-12-18 | 许继集团有限公司 | A kind of circuitry fault detection method and system |
| CN109103858A (en) * | 2018-10-18 | 2018-12-28 | 南京南瑞继保电气有限公司 | A kind of parallel connection multiterminal topology direct current branch line protection method |
| CN109245031A (en) * | 2018-10-29 | 2019-01-18 | 国网冀北电力有限公司检修分公司 | A kind of multiple-protection system of electric system |
| CN110854826A (en) * | 2019-10-18 | 2020-02-28 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Fault diagnosis and processing method for two-out-of-three protection system of flexible direct converter valve |
| CN112003257A (en) * | 2020-07-29 | 2020-11-27 | 许继集团有限公司 | Control system and method for preventing direct current energy consumption device from being refused |
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| CN107732881A (en) * | 2017-11-06 | 2018-02-23 | 许继电气股份有限公司 | A kind of direct current network dc circuit breaker failure protection method and apparatus |
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| CN112003257A (en) * | 2020-07-29 | 2020-11-27 | 许继集团有限公司 | Control system and method for preventing direct current energy consumption device from being refused |
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