CN105425103B - A kind of extra-high voltage direct-current transmission bipolar line failure restarts coordination function improved method and system - Google Patents
A kind of extra-high voltage direct-current transmission bipolar line failure restarts coordination function improved method and system Download PDFInfo
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- CN105425103B CN105425103B CN201510749622.9A CN201510749622A CN105425103B CN 105425103 B CN105425103 B CN 105425103B CN 201510749622 A CN201510749622 A CN 201510749622A CN 105425103 B CN105425103 B CN 105425103B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/063—Details concerning the co-operation of many similar arrangements, e.g. in a network
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- General Physics & Mathematics (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The present invention discloses a kind of extra-high voltage direct-current transmission bipolar line failure and restarts coordination function improved method and system, by judging this pole and to pole DC line fault, and after broadening one goes the free time, while consider one of whether in the unlocked state to pole valve group and following conditions satisfaction：The function of " another pole DC line is forbidden restarting function in a pole DC line restarting process " is opened；Or DC line is under decoupled mode, then carries out the locking of this pole.By the above method and system, after a pole line fault is avoided to restart successfully, another pole line failure can cause the risk of bipolar locking；Simultaneously in a pole line fault restarting process, another pole line failure then performs bipolar locking, meets the requirement that bipolar line failure restarts coordination function.
Description
Technical field
The present invention relates to electric system high-voltage dc transmission electrical domain, more particularly to a kind of bipolar line of extra-high voltage direct-current transmission
Road failure restarts coordination function improved method and system.
Background technology
DC transmission engineering is made of converting plant, bipolar DC link, Inverter Station, to improve direct current transportation availability, is adopted
With the bipolar double converter method of operation, a pole of extra-high voltage direct-current engineering is composed in series by two valve groups, and any valve group can use energy
Ensure that this is extremely available, 1 DC line of pole and 2 DC line of pole can independent operatings.
DC line fault is mainly transient fault, and transient fault refers to that the insulator surface as caused by thunder and lightning dodges
It is caused over the ground that the objects such as network, the short of strong wind lead, birds and branch fall branch under caused short circuit on the line and line
Electric discharge etc., such transient fault simultaneously can restart realization Failure elimination by performing failure, and direct current is avoided to be latched, but DC line
Network system can be caused to impact in failure restarting process.
In high power DC engineering, for unordered line fault is avoided to restart the impact to system, can be set in DC bipolar
It puts bipolar line failure and restarts coordination function, which configures in 2 DC line control system of 1 DC line of pole and pole.
The function mainly comprising " another pole forbids restarting function in a pole restarting process " and " pole be latched after in 15 minutes, Ling Yiji
Forbid restarting function ".
" another pole forbids restarting function in a pole restarting process " needs operations staff to put into manually or in island mode
Under automatically engage, so-called island mode is only connected with power plant for converting plant, and the power grid mould of independent operating is separated with AC network
Formula.At present in the extra-high voltage direct-current engineering of operation, the function logic existing defects, when between the time of bipolar generation line fault
Every within a certain period of time, it may occur that after a pole is restarted successfully, another pole line fault causes bipolar situation about being latched, that is, occurs
Unnecessary bipolar locking then loses a large amount of transmission powers, and larger impact is caused to power grid.
The content of the invention
It is an object of the invention to problem present in for the above-mentioned prior art, propose it is a kind of in DC protection system,
It can reflect the detection method of DC current measurement exception hidden danger early.
To achieve the purpose that foregoing invention, the invention is realized by the following technical scheme：
A kind of extra-high voltage direct-current transmission bipolar line failure restarts coordination function improved method, and 1 DC line of pole and pole 2 are straight
For a DC line in Flow Line as this pole DC line, then another DC line is to pole DC line, then includes
Following steps：
Step S10 if this pole DC line breaks down, generates Fisrt fault signal, to the signal broadening T time,
And it is sent to control module；
Step S20 if breaking down to pole DC line, generates the second fault-signal, to the signal broadening T time,
And it is sent to control module；；
Step S30, judge it is whether in the unlocked state to the valve group of pole DC line, if any one valve group be in unlock
State will then send the 3rd fault-signal to control module；
Step S40, if the function of " another pole DC line is forbidden restarting function in a pole DC line restarting process " is opened
It opens or DC line is under decoupled mode, then send the 4th fault-signal to control module；
Step S50 if control module receives step S10 to the fault-signal of step S40 simultaneously, exports this pole and closes
Request command is locked, it is on the contrary then continue operations of the parallel execution of steps S10 to step S40.
Further, the control module is using four inputs and door, only when receiving four incoming level signals simultaneously, control
Molding block generates an outputs level signals.
The broadening T time of the step S10 and S20 to keep the constant T time of Fisrt fault signal level, and continues defeated
Give control module.
T time described above is that faulty equipment goes the free time.
A kind of extra-high voltage direct-current transmission bipolar line failure of the present invention restarts coordination function improved method, can improve existing
Extra-high voltage direct-current bipolar line failure restarts the logic flaw of coordination function, another after a pole line fault is avoided to restart successfully
Pole line failure can cause the risk of bipolar locking；Simultaneously in a pole line fault restarting process, another polar curve road hair
Raw failure then performs bipolar locking.
A kind of extra-high voltage direct-current transmission bipolar line failure restarts coordination function improvement system, and 1 DC line of pole and pole 2 are straight
For a DC line in Flow Line as this pole DC line, then another DC line is to pole DC line, is included
Four inputs, one output inputs first OR gate exported, this pole broadening module and to pole broadening module, described pole with door, two
Broadening module receives this pole DC line fault signal, and this pole DC line fault signal after broadening is exported with door；It is right
Pole broadening module is received to pole DC line fault signal, and to door export after broadening to pole DC line fault signal；
The signal in the unlocked state to extremely any valve group is also received with door；First OR gate, which receives another pole in a pole restarting process, to be forbidden
Restart the enable signal of function and DC line is in the status signal of decoupled mode, the first OR gate exports letter to door
Number, export this pole DC line locking command request signal with door.
Described pole broadening module and to pole broadening module using MFP impulse generators as broadening module.
Further, further included the second OR gate, be input to the second OR gate to the status signal of each valve group of pole, second or
The output signal of door is the signal in the unlocked state to extremely any valve.
The status signal of the valve group is 1, represents that valve group is in the unlocked state.
Described pole DC line fault signal is 1, then it represents that this pole DC line fault.
Described is 1 to pole DC line fault signal, then it represents that pole DC line fault.
The enable signal of " another pole forbids restarting function in a pole restarting process " is 1, represents 1 DC line weight of pole
2 DC line of pole is forbidden restarting 1 DC line of pole in function unlatching or 2 DC line restarting process of pole and is forbidden during opening
Restart function unlatching.
The status signal that the DC line is in decoupled mode is 1, represents that DC line is in islet operation side
Formula.
Compared with prior art, a kind of extra-high voltage direct-current transmission bipolar line failure of the invention restarts coordination function improvement side
Method and system, caused advantageous effect have：
1st, solve in original function, it may occur that after a pole line fault is restarted successfully, another pole line failure meeting
The problem of causing bipolar locking；
2nd, increase hardware configuration need not be replaced, engineering availability is strong；
3rd, " in the unlocked state to extremely any valve group " decision content is added, ensure that function will not under monopole operating mode
The reliability of activation by mistake.
Description of the drawings
Fig. 1 is the electrical structure schematic diagram of extra-high voltage direct-current transmission bipolar line.
Fig. 2 is that the extra-high voltage direct-current transmission bipolar line failure of the present invention restarts the step flow of coordination function improved method
Figure.
The logic gate that Fig. 3 restarts coordination function improvement system for the extra-high voltage direct-current transmission bipolar line failure of the present invention is shown
It is intended to.
Fig. 4 is the structure diagram of MFP impulse generators.
Fig. 5 is the logical schematic of MFP impulse generators.
Specific embodiment
The technical solution in the embodiment of the present invention is clearly and completely described with reference to the accompanying drawings and examples, is shown
So, described embodiment is only part of the embodiment rather than whole embodiments of the present invention.
Referring to Fig. 1, the electrical structure schematic diagram for extra-high voltage direct-current transmission bipolar line.In extra-high voltage direct-current transmission line
Lu Zhong, using the double 12 pulse conversion devices series wiring modes of 2 circuit of 1 circuit of extra-high voltage direct-current pole and extra-high voltage direct-current pole
Bipolar line is hereinafter abbreviated as 2 DC line of 1 DC line of pole and pole, in pole 1 DC line and 2 DC line of pole it
Between both sides be respectively converting plant and Inverter Station, the main junction box equipment of converting plant and Inverter Station is essentially identical, including the change of current
Device, converter power transformer, valve group, by-pass switch, by-pass knife switch and DC filter.
If Fig. 2 is shown, the extra-high voltage direct-current transmission bipolar line failure of the embodiment of the present invention restarts coordination function improvement
Method, a DC line in 2 DC line of 1 DC line of pole and pole is as this pole DC line, then another AC line
Road is to pole DC line, then includes the following steps：
Step S10 if this pole DC line breaks down, generates Fisrt fault signal, to the signal broadening T time,
And it is sent to control module is (not shown)；
Step S20 if breaking down to pole DC line, generates the second fault-signal, to the signal broadening T time,
And it is sent to control module；；
Step S30, judge it is whether in the unlocked state to the valve group of pole DC line, if any one valve group be in unlock
State will then send the 3rd fault-signal to control module；
Step S40, if the function of " another pole DC line is forbidden restarting function in a pole DC line restarting process " is opened
It opens or DC line is under decoupled mode, then send the 4th fault-signal, " pole an AC line to control module
Another pole DC line is forbidden restarting function in the restarting process of road " it is that bipolar line failure in existing failure restarting equipment is restarted
Coordination function, in this step, " another pole DC line is forbidden restarting function in a pole DC line restarting process " is by running
Personnel actively put into enable signal；
Step S50 if control module receives step S10 to the fault-signal of step S40 simultaneously, exports this pole and closes
Request command is locked, on the contrary then continue operations of the parallel execution of steps S10 to step S40, described pole locking is ordered, and refers to direct current
Valve control system no longer sends out trigger pulse to converter valve, and change of current valve breakdown, there is no electric currents to flow through.
Further, as one embodiment, the control module only receives four using four inputs and door 101 when simultaneously
During a incoming level signal, control module generates an outputs level signals.
On the basis of above-described embodiment, the broadening T time of the step S10 and S20, to keep Fisrt fault signal electricity
Constant T time is equalled, and is persistently conveyed to control module.
T time described above is that faulty equipment goes the free time.
Further, as one embodiment, the T time goes the free time for faulty equipment..
If Fig. 3 is that shown, of the invention extra-high voltage direct-current transmission bipolar line failure restarts coordination function improvement system, pole
A DC line in 2 DC line of 1 DC line and pole is as this pole DC line, then another DC line is to pole
DC line, then its specific logical construction is as described below：
Include the first OR gate 102 with one output of the input of door 101, two, this pole broadening module 103 of four inputs one output
With to pole broadening module 104, described pole broadening module 103 receives this pole DC line fault signal, and is exported to door 101
This pole DC line fault signal after broadening；Pole broadening module 104 is received to pole DC line fault signal, and to door
101 output broadenings after to pole DC line fault signal；The letter in the unlocked state to extremely any valve group is also received with door 101
Number；First OR gate 102 receives the enable signal of " another pole forbids restarting function in a pole restarting process " and DC line is in
The status signal of decoupled mode, the first OR gate 102 export signal to door 101, and exporting this pole DC line with door 101 closes
Lock command request signal.
As shown in figure 4, described pole broadening module 103 and to pole broadening module 104 use MFP impulse generator conducts
Broadening module, for the MFP impulse generators to generate the pulse with fixed width, logic function is as shown in Figure 5：State
Signal passes through MFP impulse generator broadening T times, i.e. the status signal remained for 1 pressure duration as T, should after T time
Signal becomes 0.MFP impulse generators receive default T time as the pulse duration, this pole DC line fault signal or
To pole DC line fault signal as input pulse, time broadening T is preferably to go the free time in the present embodiment.
Further, further included the second OR gate (not shown), the status signal of each valve group of pole is input to second or
Door, the output signal of the second OR gate is the signal in the unlocked state to extremely any valve.
The status signal of the valve group is 1, represents that valve group is in the unlocked state.
Described pole DC line fault signal is 1, then it represents that this pole DC line fault,.
Described is 1 to pole DC line fault signal, then it represents that pole DC line fault.
The enable signal of " another pole forbids restarting function in a pole restarting process " is 1, represents 1 DC line weight of pole
2 DC line of pole is forbidden restarting 1 DC line of pole in function unlatching or 2 DC line restarting process of pole and is forbidden during opening
Restart function unlatching.
The status signal that the DC line is in decoupled mode is 1, represents that DC line is in islet operation side
Formula.
Above-described embodiment is only to illustrate the present invention and not limits technical solution described in the invention；Therefore, although
This specification is with reference to above-mentioned each embodiment to present invention has been detailed description, still, the ordinary skill of this field
Personnel should be appreciated that and still can modify or equivalently replace the present invention；And all do not depart from the present invention spirit and
The technical solution of scope and its improvement, should be covered by the scope of the claims of the present invention.
Claims (10)
1. a kind of extra-high voltage direct-current transmission bipolar line failure restarts coordination function improved method, which is characterized in that 1 AC line of pole
A DC line in 2 DC line of road and pole is as this pole DC line, then another DC line is to pole AC line
Road then includes the following steps：
Step S10 if this pole DC line breaks down, generates Fisrt fault signal, and to the signal broadening T time, and
It is sent to control module；
Step S20 if breaking down to pole DC line, generates the second fault-signal, and to the signal broadening T time, and
It is sent to control module；
Step S30, judge it is whether in the unlocked state to the valve group of pole DC line, if any one valve group be in unlock shape
State will then send the 3rd fault-signal to control module；
Step S40, if " another pole DC line is forbidden restarting function in a pole DC line restarting process " function open or
DC line is under decoupled mode, then sends the 4th fault-signal to control module；
Step S50, if control module receives step S10 to the fault-signal of step S40 simultaneously, exporting the locking of this pole please
Ask order, it is on the contrary then continue operations of the parallel execution of steps S10 to step S40.
2. extra-high voltage direct-current transmission bipolar line failure according to claim 1 restarts coordination function improved method, special
Sign is that the control module is using four inputs and door (101), only when receiving four incoming level signals simultaneously, control
Module generates an outputs level signals.
3. extra-high voltage direct-current transmission bipolar line failure according to claim 2 restarts coordination function improved method, special
Sign is that the broadening T time of the step S10 and S20 to keep the constant T time of Fisrt fault signal level, and continues to convey
To control module.
4. the extra-high voltage direct-current transmission bipolar line failure according to claim 1 or 3 restarts coordination function improved method,
It is characterized in that, the T time is that DC line fault goes the free time.
5. a kind of extra-high voltage direct-current transmission bipolar line failure, which restarts coordination function, improves system, 2 direct current of 1 DC line of pole and pole
A DC line in circuit is as this pole DC line, then another DC line is to pole DC line, and feature exists
In include four inputs one output inputs first OR gate (102) exported, this pole broadening module with door (101), two
(103) and to pole broadening module (104), described pole broadening module (103) receives this pole DC line fault signal, and to
This pole DC line fault signal after door (101) output broadening；Pole broadening module (104) is received to pole DC line fault
Signal, and to door (101) export broadening after to pole DC line fault signal；It is also received to pole any valve with door (101)
Group signal in the unlocked state；First OR gate (102), which receives another pole in a pole restarting process, to be forbidden restarting the enabled of function
Signal and DC line are in the status signal of decoupled mode, and the first OR gate (102) Xiang Yumen (101) exports signal, with
Door (101) exports this pole DC line locking command request signal.
6. extra-high voltage direct-current transmission bipolar line failure according to claim 5, which restarts coordination function, improves system, special
Sign is, described pole broadening module (103) and to pole broadening module (104) using MFP impulse generators as broadening mould
Block.
7. extra-high voltage direct-current transmission bipolar line failure according to claim 5, which restarts coordination function, improves system, special
Sign is, has further included the second OR gate, and the second OR gate, the output of the second OR gate are input to the status signal of each valve group of pole
Signal is the signal in the unlocked state to extremely any valve.
8. extra-high voltage direct-current transmission bipolar line failure according to claim 7, which restarts coordination function, improves system, special
Sign is that the status signal of the valve group is 1, represents that valve group is in the unlocked state.
9. extra-high voltage direct-current transmission bipolar line failure according to claim 5, which restarts coordination function, improves system, special
Sign is that described pole DC line fault signal is 1, then it represents that this pole DC line fault, it is described to the event of pole DC line
It is 1 to hinder signal, then it represents that pole DC line fault.
10. extra-high voltage direct-current transmission bipolar line failure according to claim 5, which restarts coordination function, improves system, special
Sign is that the enable signal of " another pole forbids restarting function in a pole restarting process " is 1, represents 1 DC line weight of pole
2 DC line of pole is forbidden restarting 1 DC line of pole in function unlatching or 2 DC line restarting process of pole and is forbidden during opening
Restart function unlatching, the status signal that the DC line is in decoupled mode is 1, represents that DC line is in isolated island fortune
Line mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510749622.9A CN105425103B (en) | 2015-11-05 | 2015-11-05 | A kind of extra-high voltage direct-current transmission bipolar line failure restarts coordination function improved method and system |
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| CN201510749622.9A CN105425103B (en) | 2015-11-05 | 2015-11-05 | A kind of extra-high voltage direct-current transmission bipolar line failure restarts coordination function improved method and system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105977953A (en) * | 2016-05-05 | 2016-09-28 | 南方电网科学研究院有限责任公司 | Control method and system for DC line restart function |
| 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 |
| CN110571766B (en) * | 2019-07-23 | 2020-11-13 | 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 | Direct-current line fault restarting method |
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| CN104269840A (en) * | 2014-10-20 | 2015-01-07 | 国家电网公司 | Restarting method for faults of direct current transmission line of extra-high voltage direct current engineering |
| CN104767196A (en) * | 2015-04-02 | 2015-07-08 | 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 | Automatic in service and out of service method for restarting monitoring function of direct current transmission line fault |
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