CN104767196B - Automatic in service and out of service method for restarting monitoring function of direct current transmission line fault - Google Patents
Automatic in service and out of service method for restarting monitoring function of direct current transmission line fault Download PDFInfo
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- CN104767196B CN104767196B CN201510155153.8A CN201510155153A CN104767196B CN 104767196 B CN104767196 B CN 104767196B CN 201510155153 A CN201510155153 A CN 201510155153A CN 104767196 B CN104767196 B CN 104767196B
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- direct current
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- line fault
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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
Abstract
The invention discloses an automatic in service and out of service method for restarting a monitoring function of a direct current transmission line fault. The method comprises the steps that 1, a direct current system running mode judging device module is adopted to judge a direct current system is in a networking mode or in an isolated mode; 2, the direct current system is judged to be in the networking mode in the step one, and whether an operator allows the fault to restart the monitoring function to achieve in service and out of service automatically or not is judged through a line fault monitoring function restarting and automatic in service and out of service function judging device module; 3, the operator is judged to allow the fault to restart the monitoring function to achieve in service and out of service automatically in the step two, and bipolar direct current actual transmission power is calculated by adopting a bipolar direct current power calculator module; size comparison between the bipolar direct current actual transmission power and a threshold value is conducted through a power threshold value comparator module; when the bipolar direct current actual transmission power is larger than the threshold value, automatic in service of the monitoring function restarting is conducted; when the bipolar direct current actual transmission power is smaller than the threshold value, automatic out of service of the monitoring function restarting is conducted. The automatic in service and out of service method for restarting the monitoring function of the direct current transmission line fault has the advantages that the operation efficiency of the operator is improved, and the impact of the direct current line fault on safe and stable running of a power system is reduced more effectively.
Description
Technical field
The present invention relates to a kind of direct current transmission line fault restarts function for monitoring automatic switching method.
Background technology
After DC line fault in DC engineering, execution restarting process can produce impact to alternating current-direct current electrical network, for Large Copacity
Bipolar DC engineering, during oepration at full load DC line fault restart during or restart unsuccessfully after electrical network can lose fault pole
Through-put power, need after the larger power of grid loss certain time enter steady statue, if a pole still in restarting process or
Restart unsuccessfully after locking stops transport, restart unsuccessfully after the line fault of another pole, it will extend stabilized control system and cut machine movement time, increase
The risk of system unstability.When Smaller load runs, because bipolar through-put power is less, even if the two poles of the earth execute line fault weight in succession
Open the stable operation that failure does not interfere with electrical network yet.In order to avoid DC bipolar execute out line fault restart cause be
System unstability, in DC engineering, equal configure the line fault restarts function for monitoring, controls bipolar execution line fault to restart strategy, such as straight
Forbid that another pole line fault is restarted in T time after stream next pole locking of networked mode or emergency trip.
In existing DC engineering due under island mode direct current transmission power big, line fault is restarted function for monitoring and is automatically thrown
Enter；And under DC online pattern, line fault restarts the manual input that function for monitoring depends on operations staff, and it has not been
Full input according to the power level that functional design principle is considered is exited, and is unfavorable for the safe and stable operation of electrical network, particularly
Under automated power curve, what possibility was daily is not in different power levels in the same time, and operations staff can not in time, reliably
Repeatedly throw and move back this function.
Therefore prior art has much room for improvement and develops.
Content of the invention
The technical problem to be solved in the present invention is to provide one kind can realize under different capacity level, line fault being restarted
Function for monitoring automatic switching, ensures that the direct current transmission line fault of the safety and stability of electrical network restarts function for monitoring automatic switching side
Method.
The technical solution of the present invention is：A kind of direct current transmission line fault restarts function for monitoring automatic switching method,
Comprise the following steps：
S1：Judge that straight-flow system is in networked mode or island mode using straight-flow system operational mode diagnosis apparatuss module；
S2：Judge in S1 that straight-flow system is in networked mode, function for monitoring automatic switching function is restarted by line fault
Diagnosis apparatuss module judges whether operations staff allows fault to restart function for monitoring and realize automatic switching；
S3：Judge in S2 that operations staff allows fault to restart function for monitoring and realizes automatic switching, using bipolar DC power
Calculator modules calculate the power of bipolar DC actual transmissions；Bipolar DC is compared by power threshold value comparator module actual
The power of transmission and the size of threshold value；The power of bipolar DC actual transmissions then automatically engages more than threshold value restarts supervision work(
Energy；The power of bipolar DC actual transmissions then automatically exits from restarting function for monitoring less than threshold value.
Judge in S1 that straight-flow system is in island mode, then automatically engage line fault and restart function for monitoring.
Judge in S2 that operations staff does not allow fault to restart function for monitoring and realizes automatic switching, operations staff then puts into manually
Line fault restarts function for monitoring.
Straight-flow system operational mode judge module, its major function is as follows：
1) receive the DC operation pattern that pole control system is sent in the control of direct current station, judge that straight-flow system is in networked mode or orphan
Island pattern；
2) straight-flow system is in island mode, automatically engages line fault and restarts function for monitoring；
3) straight-flow system is in networked mode, then enter the decision logic of next link.
Line fault restarts function for monitoring automatic switching function diagnosis apparatuss module, and its major function is as follows：
1) first decision logic is in the enable condition as diagnosis apparatuss module under networked mode for straight-flow system, networking
Under pattern, input state amount 1 is in judge module；Under non-networked pattern, input state amount 0 is in judge module；Diagnosis apparatuss mould
The numerical value of the input state amount of tuber evidence, whether judge module has an effect, when input state numerical quantity is 1, then judge module
Activation, enters second decision logic；
2), after entering second decision logic, receive the order that operations staff issues, if operations staff does not allow fault weight
Open function for monitoring automatic switching, then the input quantity in diagnosis apparatuss module is 0；If operations staff allows fault to restart function for monitoring certainly
Dynamic throwing is moved back, then the input quantity in diagnosis apparatuss module is 1.The order input quantity that diagnosis apparatuss reception operations staff issues is 0, then do not enter
Enter the 3rd decision logic, fault is restarted function for monitoring and can only be put into manually by operations staff；Diagnosis apparatuss receive operations staff
The order input quantity issuing is 1, then enter the 3rd decision logic.
Bipolar DC power calculator module, for calculating the power of bipolar DC actual transmissions；Specific algorithm is as follows：
P=ABS (U1*I1)+ABS(U2*I2)；
P is the power of bipolar DC actual transmissions, U1For pole 1 DC voltage, I1For pole 1 DC current, U2For pole 2 direct current
Voltage, I2For pole 2 DC current, ABS () represents and takes absolute value.
Power threshold value comparator module, for comparing power P and the threshold value P of bipolar DC actual transmissionsDoorSize；
It comprises the following steps that：
1) when operations staff allows fault to restart function for monitoring automatic switching, comparator module just can be had an effect；
2)P≥PDoor, the power of bipolar DC actual transmissions then automatically engages more than or equal to threshold value restarts function for monitoring；
3)P<PDoor, the power of bipolar DC actual transmissions then automatically exits from restarting function for monitoring less than threshold value.
Beneficial effects of the present invention：Can realize restarting function for monitoring to line fault under different capacity level and automatically throw
Move back, ensure the safety and stability of electrical network, improve the operating efficiency of operations staff, more effectively reduce DC line fault to electrical network
The impact of safe and stable operation.
Brief description
Fig. 1 is automatic switching method schematic of the present invention
Specific embodiment
Embodiment：
A kind of direct current transmission line fault restarts function for monitoring automatic switching method, comprises the following steps：
S1：Judge that straight-flow system is in networked mode or island mode using straight-flow system operational mode diagnosis apparatuss module,
If judging, straight-flow system is in island mode, automatically engages line fault and restarts function for monitoring.
S2：First decision logic of automatic switching function diagnosis apparatuss module is to judge that straight-flow system is in networking mould in S1
Formula, then the input quantity of automatic switching function diagnosis apparatuss module is 1, and diagnosis apparatuss module activation enters second decision logic.Receive
The order that operations staff issues, if allowing fault to restart the order of function for monitoring automatic switching, bid value inputs as 1, then enter
Enter S3 step；If not allowing fault to restart the order of function for monitoring automatic switching, bid value inputs as 0, does not enter S3 step.
S3：Judge in S2 that operations staff allows fault to restart function for monitoring and realizes automatic switching, using bipolar DC power
Calculator modules calculate the power of bipolar DC actual transmissions；Bipolar DC is compared by power threshold value comparator module actual
The power of transmission and the size of threshold value；The power of bipolar DC actual transmissions then automatically engages more than threshold value restarts supervision work(
Energy；The power of bipolar DC actual transmissions then automatically exits from restarting function for monitoring less than threshold value.S2 judges that operations staff does not permit
Permitted fault to restart function for monitoring and realize automatic switching, operations staff then puts into line fault manually and restarts function for monitoring.
The method specific workflow is as follows：
A kind of direct current transmission line fault is restarted function for monitoring automatic switching method and following three situation is analyzed：
(1) straight-flow system operational mode diagnosis apparatuss module judges system running pattern, and direct current is under island mode, then certainly
The dynamic line fault that puts into restarts function for monitoring.
(2) straight-flow system operational mode diagnosis apparatuss module judges system running pattern, and direct current is under networked mode, runs
After personnel allow input direct current transmission line fault to restart function for monitoring automatic switching function, the method judges direct current transmission power
Whether more than threshold value P (P value is chosen operations staff and put into corresponding watt level empirical value during this function manually), if being more than door
Threshold value, then automatically engage function for monitoring, if being less than threshold value, automatically exits from function for monitoring.Change procedure in dc power
In, the throwing of higher efficiency can move back and restart function for monitoring.
(3) straight-flow system operational mode diagnosis apparatuss module judges system running pattern, and direct current is under networked mode, runs
Personnel do not allow input direct current transmission line fault to restart function for monitoring automatic switching function, then the input restarting function for monitoring is moved back
Go out to still rely on operations staff to put into manually, exit.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and this embodiment simultaneously is not used to limit this
Bright the scope of the claims, all equivalence enforcements done without departing from the present invention or change, are intended to be limited solely by the scope of the claims of this case.
Claims (3)
1. a kind of direct current transmission line fault restart function for monitoring automatic switching method it is characterised in that：Comprise the following steps：
S1：Judge that straight-flow system is in networked mode or island mode using straight-flow system operational mode diagnosis apparatuss module；
S2：Judge in S1 that straight-flow system is in networked mode, function for monitoring automatic switching function is restarted by line fault and judges
Device module judges whether operations staff allows fault to restart function for monitoring and realize automatic switching；
S3：Judge in S2 that operations staff allows fault to restart function for monitoring and realizes automatic switching, using bipolar DC power calculation
Device module calculates the power of bipolar DC actual transmissions；Bipolar DC actual transmissions are compared by power threshold value comparator module
Power and threshold value size；The power of bipolar DC actual transmissions then automatically engages more than threshold value restarts function for monitoring；
The power of bipolar DC actual transmissions then automatically exits from restarting function for monitoring less than threshold value；
First decision logic that described line fault restarts function for monitoring automatic switching function diagnosis apparatuss module is to judge in S1
Straight-flow system is in networked mode, then the input quantity of automatic switching function diagnosis apparatuss module is 1, and diagnosis apparatuss module activation enters
Second decision logic, receives the order that operations staff issues, if allowing fault to restart the order of function for monitoring automatic switching,
Bid value inputs as 1, then enter S3 step；If not allowing fault to restart the order of function for monitoring automatic switching, bid value is defeated
Enter for 0, do not enter S3 step.
2. direct current transmission line fault according to claim 1 restart function for monitoring automatic switching method it is characterised in that：
Judge in S1 that straight-flow system is in island mode, then automatically engage line fault and restart function for monitoring.
3. direct current transmission line fault according to claim 1 restart function for monitoring automatic switching method it is characterised in that：
S2 judges that operations staff does not allow fault to restart function for monitoring and realizes automatic switching, and operations staff then puts into line fault weight manually
Open function for monitoring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510155153.8A CN104767196B (en) | 2015-04-02 | 2015-04-02 | Automatic in service and out of service method for restarting monitoring function of direct current transmission line fault |
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| CN201510155153.8A CN104767196B (en) | 2015-04-02 | 2015-04-02 | Automatic in service and out of service method for restarting monitoring function of direct current transmission line fault |
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| CN104767196B true CN104767196B (en) | 2017-02-22 |
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| CN105606917B (en) * | 2015-10-30 | 2018-07-27 | 南方电网科学研究院有限责任公司 | Common-tower double-return DC engineering returns interior shunt tripping correlation function experimental study method and system |
| CN105425103B (en) * | 2015-11-05 | 2018-05-18 | 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 | A kind of extra-high voltage direct-current transmission bipolar line failure restarts coordination function improved method and system |
| CN107086560B (en) * | 2017-06-23 | 2023-05-16 | 南方电网科学研究院有限责任公司 | Method and system for locking direct current under island low power and direct current station control cabinet |
| CN111193238B (en) * | 2020-01-14 | 2021-12-14 | 中国南方电网有限责任公司 | Direct-current line fault restarting method and device for multi-terminal high-voltage direct-current power transmission system |
| CN113824096B (en) * | 2021-09-18 | 2024-04-02 | 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 | Method, device, equipment and storage medium for resetting direct current transmission line protection system |
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| CN1808158A (en) * | 2005-12-15 | 2006-07-26 | 南京南瑞继保电气有限公司 | Pole block comprehensive distinguishing method for DC power transmission system |
| CN102136726B (en) * | 2011-03-09 | 2013-10-30 | 中国电力工程顾问集团西南电力设计院 | Method and device for detecting operation mode of convertor station |
| CN102856983B (en) * | 2012-09-29 | 2014-08-27 | 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 |
| CN103490411B (en) * | 2013-09-09 | 2015-07-08 | 南京南瑞继保电气有限公司 | Method for disposing extra-high-voltage direct current redundancy electrode control device after failure |
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