CN106684840A - Exit method under unavailable condition of DC protection in DC pole control systems - Google Patents
Exit method under unavailable condition of DC protection in DC pole control systems Download PDFInfo
- Publication number
- CN106684840A CN106684840A CN201710047893.9A CN201710047893A CN106684840A CN 106684840 A CN106684840 A CN 106684840A CN 201710047893 A CN201710047893 A CN 201710047893A CN 106684840 A CN106684840 A CN 106684840A
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- Prior art keywords
- direct current
- current protecting
- unavailable
- protecting device
- sets
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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
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- Emergency Protection Circuit Devices (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses an exit method under an unavailable condition of DC protection in DC pole control systems. A primary system of each pole control system reports a software fault that ''various sets of DC protection devices all are unavailable'', and carries out primary and standby system switching of the pole control systems when detecting that various sets of DC protection devices all are unavailable; and when the two sets of pole control systems judge that various sets of DC protection devices all are unavailable, a pole control monitoring trip is generated, so that the reliability of detecting the available states of the DC protection devices by the pole control systems is improved, and a DC system mistrip caused by misjudgement of the available states of the DC protection devices due to the fault of single set of pole control system is avoided.
Description
Technical field
The present invention relates to power system high-voltage dc transmission electrical domain, direct current in more particularly to a kind of direct current polar control system
Protection exports method when unavailable.
Background technology
Direct current protecting reacts the exception or malfunction of straight-flow system equipment, quickly realize exception or faulty equipment every
From, it is to avoid the expansion of exception or failure in straight-flow system, there is important meaning to the safe and stable operation of DC transmission engineering
Justice.
Direct current protecting has various redundant configuration modes in DC transmission engineering, mainly includes that two from three configuration, dual are matched somebody with somebody
Put.
The configuration of so-called direct current protecting two from three, it is identical independent straight to refer to that DC transmission engineering is configured with three sets of functions
Stream protection device.According to three sets of available situations of direct current protecting device, several situations are contained：When three sets of direct current protecting devices are equal
When available, as long as three sets of direct current protectings or wherein two sets protection acts, protection is just exported, the two from three of meaning；When three sets of direct currents are protected
When only having two sets can use in protection unit, as long as two sets of protections or wherein a set of protection act, protection just outlet, the two of meaning takes one；
When there was only a set of available in three sets of direct current protecting devices, as long as the set protection act, protection is just exported, and one of meaning takes one.
So-called direct current protecting duplicate system retrofit, refers to that DC transmission engineering is configured with two sets of independent direct current protecting devices,
When a set of direct current protecting device action, protection is just exported.When wherein a set of direct current protecting device exception or unavailable failure, remain
Remaining a set of direct current protecting device can guarantee that the available of direct current protecting function.
The many configuration modes using duals of direct current pole control, a set of under normal circumstances to control control system be on duty
The main system of state, another set of control system is the back-up system in stand-by state.When main system exception or failure are unavailable
When, former back-up system switches to main system.
By the way of redundant configuration, it is advantageous in that when which part direct current protecting device is unavailable direct current protecting,
Ensure the available of direct current protecting function, improve the reliability of direct current protecting.To ensure the safety and stability fortune of DC transmission engineering
OK, DC transmission engineering does not allow the situation for unprotect operation occur, when all direct current protecting devices are unavailable, it is necessary to stop
Fortune straight-flow system.
To detect the upstate of each set direct current protecting device, whether available each set direct current protecting device status signal be equal
Deliver to two sets of direct current polar control systems of duplicate system retrofit.It is whether available to each set direct current protecting device by polar control system
State is judged, and starts corresponding outlet logic.
At present, when the main system list set system detectio of DC transmission engineering polar control system is equal to each set direct current protecting device
When unavailable, that is, start pole control monitoring trip avoidance function, will exist because the failure cause of polar control system itself is to each set
The upstate misjudgment of direct current protecting device and cause the major hidden danger of straight-flow system mistrip, i.e., in direct current protecting device
In the case of available, due to the reason such as hardware and software failure of polar control system itself, each set direct current protecting device is mistakenly judged
It is unavailable, cause straight-flow system mistrip.
The content of the invention
It is an object of the invention to propose to export method when direct current protecting is unavailable in a kind of direct current polar control system, with
The failure cause due to polar control system list set system itself is avoided to each upstate misjudgment for covering direct current protecting device
And cause the generation of straight-flow system mistrip.
In order to solve the above-mentioned technical problem, technical scheme is as follows：
Method is exported when direct current protecting is unavailable in a kind of direct current polar control system, is comprised the following steps：
A, DC transmission engineering is respectively covered direct current protecting device itself formation available signal send the two of duplicate system retrofit
Set polar control system；
B, the main system and back-up system of two sets of polar control systems are carried out to each upstate for covering direct current protecting device
Judge；
When C, main system judge that each set direct current protecting device is unavailable, report " each set direct current protecting device is unavailable " is soft
Part failure simultaneously carries out polar control system switching, and former main system switches to back-up system, former back-up system to switch to main system；
Main system judge each set direct current protecting device it is unavailable for no when, do not report that " each set direct current protecting device can not
With " software fault, do not carry out polar control system switching；
When D, back-up system judge that each set direct current protecting device is unavailable, report " each set direct current protecting device is unavailable "
Software fault.Back-up system judge each set direct current protecting device it is unavailable for no when, do not report that " each set direct current protecting device is not
Can use " software fault；
E, when the main system (former back-up system) after switching equally judge it is each set direct current protecting device it is unavailable when, two sets
Polar control system is all made that the disabled judgement of direct current protecting device of each set, confirms that " each set direct current protecting device can not
With ", start polar control system monitoring tripping operation；
F, when the main system (former back-up system) after switching judge it is each set direct current protecting device it is unavailable for no when, two sets
Direct current protecting device is unavailable is made that different judgements to each set for polar control system, does not confirm " each set direct current protecting device
It is unavailable ", polar control system monitoring tripping operation is not started.
The DC transmission engineering direct current protecting is adopted using two from three configuration or the redundant configuration of dual, the control of direct current pole
Use dual redundant configuration.
The invention provides direct current protecting in a kind of direct current polar control system it is unavailable when export method, when pole control be
System main system list set system detectio to it is each cover direct current protecting device it is unavailable when, " respectively cover direct current protecting except report itself
Device is unavailable " outside software fault, the switching of polar control system is also carried out, switch to standby polar control system.When two sets
Polar control system detect it is each set direct current protecting device it is unavailable when, side produce pole control monitoring tripping operation.Avoid due to pole
The failure cause of control system list set system itself causes direct current to the upstate misjudgment of each set direct current protecting device
The generation of system mistrip.
Compared with conventional art, the beneficial effect that the present invention is brought has：
The characteristics of making full use of direct current polar control system dual redundant configuration, system is covered in polar control system main system list
Detect each set direct current protecting device it is unavailable when, except reporting itself " each set direct current protecting device unavailable " software therefore
Barrier is outer, also carries out the switching of polar control system, switches to standby polar control system.When former standby polar control system is similarly examined
Measure it is each set direct current protecting device it is unavailable when, side produce pole control monitoring tripping operation.Improve polar control system and detect each set
The reliability of direct current protecting device upstate, it is to avoid straight to each set due to polar control system list set system faults itself
Flow the upstate misjudgment of protection device and cause the generation of straight-flow system mistrip.
Brief description of the drawings
Fig. 1 is the flow chart of the embodiment of the present invention.
Specific embodiment
Present disclosure is described in further details with reference to the accompanying drawings and detailed description.
Embodiment：
As shown in figure 1, in case of direct current protecting device two from three is configured, direct current in a kind of direct current polar control system
Protection exports method when unavailable, comprises the following steps：
A, two sets of polar control systems that the available signal that three sets of direct current protecting devices itself are formed is sent duplicate system retrofit.
B, the main system and back-up system of two sets of polar control systems are carried out to three sets of upstates of direct current protecting device
Judge.
C, when main system judges that three sets of direct current protecting devices are unavailable, report " three sets of direct current protecting devices are unavailable "
Software fault；When back-up system judges that three sets of direct current protecting devices are unavailable, " three sets of direct current protecting devices are not for same report
Can use " software fault.
D, when main system judges that three sets of direct current protecting devices are unavailable, except report " three sets of direct current protecting devices are not
Can use " outside software fault, and polar control system active-standby switch is carried out, former main system switches to back-up system, former back-up system to cut
It is changed to main system.
E, when the main system (former back-up system) after switching is same judge that three sets of direct current protecting devices are unavailable when, two sets
Polar control system is all made that three sets of disabled judgements of direct current protecting device, confirms that " three sets of direct current protecting devices can not
With ", start polar control system monitoring tripping operation.
F, when the main system (former back-up system) after switching judge three sets of direct current protecting devices it is unavailable for no when, two sets
Polar control system is unavailable to three sets of direct current protecting devices to be made that different judgements, does not confirm " three sets of direct current protecting devices
It is unavailable ", polar control system monitoring tripping operation is not started.
The inventive method is described in detail below：
By three sets of direct current protecting devices of DC transmission engineering itself formed available signal be respectively designated as DCP1_OK,
DCP2_OK, DCP3_OK, represent respectively first set, second set, whether the 3rd set of direct current protecting device can use.DCP1_OK、
DCP2_OK, DCP3_OK send two sets of polar control systems of duplicate system retrofit, including main system and back-up system.
When n-th (n=1,2,3) set direct current protecting device is available, the set direct current protecting device send the letter of polar control system
Number DCPn_OK puts 1；When n-th (n=1,2,3) set direct current protecting device is unavailable, the set direct current protecting device send pole to control system
The signal DCPn_OK of system sets to 0.
In two sets of polar control systems, including main system and back-up system, by a nor gate (NOR) to DCP1_OK,
Tri- signals of DCP2_OK, DCP3_OK are processed, and form one " three sets of direct current protecting devices are unavailable (3DCP_NOK) "
Signal.
The input/output relation of nor gate (NOR) is：When each input is 0,1 is output as；It is 1 to be respectively input at least one
When, it is output as 0.
1 is put when DCP1_OK, DCP2_OK, DCP3_OK are 0,3DCP_NOK signals, polar control system judges three sets of direct currents
Protection device is unavailable；If at least one is set to 0 for 1,3DCP_NOK signals for DCP1_OK, DCP2_OK, DCP3_OK, pole control
System processed judges that three sets of direct current protecting devices are at least a set of available.
Two sets of any set of system of polar control system, either in main system state or back-up system state, if
Judge that three sets of direct current protecting devices are unavailable, that is, report " three sets of direct current protecting devices are unavailable " software fault.
1. when polar control system main system judge three sets of direct current protecting devices it is unavailable for no when, do not report " three sets of direct currents
Protection device is unavailable " software fault, do not carry out polar control system switching；When polar control system main system judges three sets of direct currents
When protection device is unavailable, " three sets of direct current protecting devices are unavailable " software fault is reported, and by " three sets of direct current protecting devices
It is unavailable " fault-signal is sent to back-up system, while carrying out polar control system switching, former main system switches to standby system
System, former back-up system switches to main system.
2. when the main system (former back-up system) after switching judges that three sets of direct current protecting devices are unavailable, " three sets are confirmed
Direct current protecting device is unavailable ", start polar control system monitoring tripping operation；Main system (former back-up system) after switching judges
Three sets of direct current protecting devices it is unavailable for it is no when, do not confirm " three sets of direct current protecting devices are unavailable ", pole control is not started
System monitoring is tripped.
3. when polar control system only main system one is enclosed within operation, when another set of system exception or failure cause unavailable,
Main system judges that three sets of direct current protecting devices are unavailable, it is impossible to carry out the switching of main preparation system, and main system directly initiates pole control
System monitoring tripping operation processed.
The characteristics of making full use of direct current polar control system dual redundant configuration, system is covered in polar control system main system list
Detect each set direct current protecting device it is unavailable when, except reporting itself " each set direct current protecting device unavailable " software therefore
Barrier is outer, also carries out the switching of polar control system, switches to standby polar control system.When former standby polar control system is similarly examined
Measure it is each set direct current protecting device it is unavailable when, side produce pole control monitoring tripping operation.Improve polar control system and detect each set
The reliability of direct current protecting device upstate, it is to avoid straight to each set due to polar control system list set system faults itself
Flow the upstate misjudgment of protection device and cause the generation of straight-flow system mistrip.
Above-listed detailed description is directed to illustrating for one of present invention possible embodiments, and the embodiment is simultaneously not used to limitation
The scope of the claims of the invention, all equivalence enforcements or change without departing from carried out by the present invention are intended to be limited solely by the scope of the claims of this case
In.
Claims (2)
1. method is exported when direct current protecting is unavailable in a kind of direct current polar control system, it is characterised in that comprised the following steps：
A, the available signal that DC transmission engineering respectively covers direct current protecting device itself formation send two sets of poles of duplicate system retrofit
Control system；
B, the main system and back-up system of two sets of polar control systems are judged each upstate for covering direct current protecting device；
C, when main system judges that each set direct current protecting device is unavailable, report " each set direct current protecting device unavailable " software
Failure；When back-up system judges that each set direct current protecting device is unavailable, same report " can not by each set direct current protecting device
With " software fault；
D, when main system judges that each set direct current protecting device is unavailable, except report " each set direct current protecting device unavailable "
Outside software fault, and polar control system active-standby switch is carried out, former main system switches to back-up system, based on former back-up system switching
System；
E, when the main system after switching equally judge it is each set direct current protecting device it is unavailable when, two sets of polar control systems are all made
The direct current protecting device disabled judgement of each set, confirms " each set direct current protecting device is unavailable ", starts pole control system
System monitoring tripping operation；
F, when the main system after switching judge it is each set direct current protecting device it is unavailable for no when, two sets of polar control systems are to each set
Direct current protecting device is unavailable to be made that different judgements, does not confirm " each set direct current protecting device is unavailable ", does not start
Polar control system monitoring tripping operation.
2. method is exported when direct current protecting is unavailable in direct current polar control system according to claim 1, and its feature exists
In, using two from three configuration or the redundant configuration of dual, the control of direct current pole is using double for the DC transmission engineering direct current protecting
Change redundant configuration again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710047893.9A CN106684840B (en) | 2017-01-20 | 2017-01-20 | Method is exported when direct current protecting is unavailable in a kind of direct current polar control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710047893.9A CN106684840B (en) | 2017-01-20 | 2017-01-20 | Method is exported when direct current protecting is unavailable in a kind of direct current polar control system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106684840A true CN106684840A (en) | 2017-05-17 |
| CN106684840B CN106684840B (en) | 2018-11-23 |
Family
ID=58859554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710047893.9A Active CN106684840B (en) | 2017-01-20 | 2017-01-20 | Method is exported when direct current protecting is unavailable in a kind of direct current polar control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816805A (en) * | 2019-11-15 | 2021-05-18 | 许继集团有限公司 | Flexible direct current converter valve control system and over-current detection method and system |
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| CN102856983A (en) * | 2012-09-29 | 2013-01-02 | 南京南瑞继保电气有限公司 | Method for monitoring and processing faults of ultrahigh-voltage direct current redundancy pole control devices |
| CN103197172A (en) * | 2013-03-05 | 2013-07-10 | 华北电力大学 | Direct current protection system reliability assessment method in 'two from three' mode |
| CN103219798A (en) * | 2013-03-25 | 2013-07-24 | 国网智能电网研究院 | Direct-current transmission converter valve control protection system and control protection method thereof |
| CN204835700U (en) * | 2015-09-01 | 2015-12-02 | 国家电网公司 | Direct current transmission controlling means switched systems |
| US20160054394A1 (en) * | 2014-08-19 | 2016-02-25 | Astronics Advanced Electronic Systems Corp. | High Reliability Power Supply Configuration and Testing |
| CN105529822A (en) * | 2014-09-28 | 2016-04-27 | 国家电网公司 | Redundancy control protection system |
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2017
- 2017-01-20 CN CN201710047893.9A patent/CN106684840B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102856983A (en) * | 2012-09-29 | 2013-01-02 | 南京南瑞继保电气有限公司 | Method for monitoring and processing faults of ultrahigh-voltage direct current redundancy pole control devices |
| CN103197172A (en) * | 2013-03-05 | 2013-07-10 | 华北电力大学 | Direct current protection system reliability assessment method in 'two from three' mode |
| CN103219798A (en) * | 2013-03-25 | 2013-07-24 | 国网智能电网研究院 | Direct-current transmission converter valve control protection system and control protection method thereof |
| US20160054394A1 (en) * | 2014-08-19 | 2016-02-25 | Astronics Advanced Electronic Systems Corp. | High Reliability Power Supply Configuration and Testing |
| CN105529822A (en) * | 2014-09-28 | 2016-04-27 | 国家电网公司 | Redundancy control protection system |
| CN204835700U (en) * | 2015-09-01 | 2015-12-02 | 国家电网公司 | Direct current transmission controlling means switched systems |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816805A (en) * | 2019-11-15 | 2021-05-18 | 许继集团有限公司 | Flexible direct current converter valve control system and over-current detection method and system |
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| Publication number | Publication date |
|---|---|
| CN106684840B (en) | 2018-11-23 |
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