CN102856983A - Method for monitoring and processing faults of ultrahigh-voltage direct current redundancy pole control devices - Google Patents
Method for monitoring and processing faults of ultrahigh-voltage direct current redundancy pole control devices Download PDFInfo
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- CN102856983A CN102856983A CN2012103783894A CN201210378389A CN102856983A CN 102856983 A CN102856983 A CN 102856983A CN 2012103783894 A CN2012103783894 A CN 2012103783894A CN 201210378389 A CN201210378389 A CN 201210378389A CN 102856983 A CN102856983 A CN 102856983A
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Abstract
The invention discloses a method for monitoring and processing faults of ultrahigh-voltage direct current redundancy pole control devices. A pole protecting three-taking-two device and pole protecting devices carry out bidirectional communication; three sets of pole protecting devices are mutually independent and respectively used for monitoring the operating conditions of two sets of pole control devices; when a certain set of pole protecting device monitors the faults of two sets of redundancy pole control devices, the pole protecting device sends a quit request signal to the pole protecting three-taking-two device; after receiving the signal, the pole protecting three-taking-two device judges whether all operating pole protecting devices simultaneously send the signal or not, if not, the pole protecting three-taking-two device sends a quit allowing signal to the pole protecting device requesting quit, and the pole protecting device locks the protection and quits operating; and if so, the pole protecting three-taking-two device sends a quit forbidding signal to the pole protecting device requesting quit, and the pole protecting device runs continuously. With the adoption of the monitoring and processing method, when the ultrahigh-voltage direct current redundancy pole control devices fail, pole stop caused by unprotected operation of polar layers is avoided, and an ultrahigh-voltage direct current system can maintain the state before the pole control devices fail and run continuously.
Description
Technical field
The invention belongs to the extra-high voltage direct-current transmission field, particularly a kind of supervision and fault handling method of extra-high voltage direct-current control protection system.
Background technology
The characteristics of extra-high voltage DC transmission system are that every end current conversion station has 4 12 pulse conversion devices, are divided into the two poles of the earth, two converter series connection of every utmost point.Adapt with primary system, the control protection system of each utmost point is divided into utmost point layer, converter layer, and every layer control device all adopts the dual redundant configuration, and protective device adopts three to get two redundant configuration.The configuration of the typical one pole control of extra-high voltage direct-current protection system as shown in Figure 1.
Three cover electrode protectors of the every utmost point of extra-high voltage direct-current are separate, overlap redundant utmost point control device communication with two respectively by control LAN net separately, and the running status of real time monitoring utmost point control device.Redundant utmost point control device one cover is on duty, and a cover is for subsequent use, can carry out system after device on duty breaks down and switch in 1ms, guarantees that more intact cover is in state on duty in the two cover utmost point control devices.
The function of extra-high voltage direct-current control system is assigned two kinds of technology paths:
The first technology path is that the closed-loop adjustment function with direct current, direct voltage, extinguish angle is arranged in the utmost point layer control device, and utmost point control device produces the Trigger Angle instruction, is handed down to converter control device.When the utmost point control device of dual redundancy all during fault, direct current system loses the closed-loop adjustment function, and this extremely must be stopped transport.
The second technology path is that the closed-loop adjustment function with direct current, direct voltage, extinguish angle is arranged in the converter layer control device, and utmost point control device produces the direct current instruction, is handed down to converter control device.Adopt this technology path, when the utmost point control device of dual redundancy all during fault, converter control device can keep the current-order before the fault, keeps the closed-loop adjustment function, and the direct current system attitude of still can remaining stationary continues operation in theory.
Existing extra-high voltage direct-current control protection system supervision method derives from conventional DC control and protection system, and when protective device lost communication with control device on duty, this cover of locking is protected immediately, and was out of service; After redundant protective device is all out of service, the unprotect operation logic corresponding direct current system of will stopping transport.This supervision and fault handling method are applicable to above-mentioned functions and distribute the first technology path, because when redundant utmost point control plant failure occurs, the result of the first technology path and this supervision method is consistent, all will cause utmost point stoppage in transit.But this supervision method is used for function distributes the second technology path, when redundant utmost point control plant failure occurs, even converter control device possesses the ability of the direct current system kept operation, still can cause the utmost point to be stopped transport because of the operation of utmost point layer unprotect.
Summary of the invention
Purpose of the present invention; be to provide supervision and the processing method of the redundant utmost point control of a kind of extra-high voltage direct-current plant failure; it can avoid monitoring after the redundant utmost point control plant failure all out of service because of electrode protector; then the situation that causes the utmost point to be stopped transport is so that this utmost point still can be kept operation after the redundant utmost point control plant failure.
In order to reach above-mentioned purpose, solution of the present invention is:
Supervision and the processing method of the redundant utmost point control of a kind of extra-high voltage direct-current plant failure, utmost point layer three is got two devices and electrode protector both-way communication, comprises the steps:
A, when certain cover electrode protector monitors two covers during redundant utmost point control plant failure, the request of sending out is withdrawed from signal and is got two devices to utmost point layer three, enters step b; When electrode protector monitors self serious or emergency, then need not request, this cover of locking is protected immediately, and is out of service;
B, utmost point layer three are got after request that two devices receives that the electrode protector of operation is sent withdraws from signal, and the electrode protector sum that computation requests withdraws from detects whether signal is withdrawed from the request of sending simultaneously of operating all electrode protectors, and following two kinds of situations are arranged:
(1) if not signal is withdrawed from the request of sending simultaneously of the electrode protector of all operations, then utmost point layer three is got electrode protector that two devices withdraws to request and is sent out and allow to withdraw from signal, and after electrode protector was received and allowed to withdraw from signal, this cover of locking is protected, and was out of service;
(2) if signal is withdrawed from the request of sending simultaneously of the electrode protector of all operations, utmost point layer three is got two devices and will be sent out to the electrode protector of all operations and forbid withdrawing from signal, after electrode protector is received and forbidden withdrawing from signal, continues operation.
Among the above-mentioned steps a, electrode protector judges that the condition that redundant utmost point control plant failure occurs is when at least one of following situations occuring:
(1) the equal fault of communication of electrode protector and the redundant utmost point control device of two covers;
(2) electrode protector monitor two the cover redundant utmost point control device all be not in state on duty;
(3) electrode protector monitors utmost point control device generation emergency on duty, and utmost point control system does not produce switching in delay time.
In the above-mentioned situation (3), the span of delay time is 5～20ms.
Among the above-mentioned steps b; utmost point layer three is got two devices and detected whether operating all electrode protectors request of sending simultaneously and withdraw from the method for signal and be: utmost point layer three is got two devices and time-delay is set before allowing utmost point protection to withdraw from judging; in the time-delay window; if utmost point layer three is got the request that two devices received that operating all electrode protectors are sent and is withdrawed from signal; then the simultaneity condition is set up; forbid that utmost point protection withdraws from; otherwise be false, electrode protector transmission from signal to the request of sending that withdraw from allows to withdraw from signal.
The span of above-mentioned time-delay window is 3～10ms.
After adopting such scheme; the closed-loop adjustment function that the present invention is applicable to direct current, direct voltage, extinguish angle is arranged in the extra-high voltage direct-current control protection system of converter control layer; make the extra-high voltage direct-current system when redundant utmost point control plant failure occurs; can all not withdraw from because of utmost point protection causes the utmost point to be stopped transport; the attitude of still remaining stationary the fault utmost point continues to move, thereby has promoted reliability and the availability factor of extra-high voltage DC transmission system.
Description of drawings
Fig. 1 is the typical one pole control of extra-high voltage direct-current protection system allocation plan;
Fig. 2 is the logic diagram that electrode protector is judged redundant utmost point control plant failure;
Wherein, the arrow representative data flows to, and the logic of time-delay effective efficiency is when being input as 1 and when keeping above delay value, being output as 1;
Fig. 3 is that utmost point layer three is got the logic diagram that the two devices judgement allows/forbid utmost point protection to withdraw from;
Wherein, the arrow representative data flows to.
Embodiment
Below with reference to accompanying drawing, technical scheme of the present invention is elaborated.
The configuration of the typical one pole control of extra-high voltage direct-current as shown in Figure 1 protection system, the control protection system of each utmost point is divided into utmost point layer and converter layer, and utmost point layer comprises that utmost point control device, the three cover electrode protectors and two of dual overlap utmost point layers three and get two devices; The control protection of each converter comprises that converter control device, the three cover converter protective devices and two of dual overlap converters three and get two devices.Communication between device realizes by the control network of hierarchical, redundant.
The present invention at first increases from utmost point layer three and gets the communication line that two devices sends a signal to electrode protector, makes utmost point layer three get two devices and electrode protector possesses bidirectional communication function.
The logic that electrode protector is judged redundant utmost point control plant failure as shown in Figure 2.
By the "or" logic, when one of following situations occured, electrode protector judged that redundant utmost point control plant failure or redundancy communication fault occur, and got the two devices request of sending to two cover utmost point layers three and withdrawed from signal:
(1) the equal fault of communication of electrode protector and the redundant utmost point control device of two covers;
(2) electrode protector monitor two the cover redundant utmost point control device all be not in state on duty;
(3) electrode protector monitors utmost point control device generation emergency on duty, and does not produce the switching of utmost point control system after the time-delay, and fault condition is still set up.The span of delay time is 5～20ms, gets 15ms in the present embodiment.
After signal was withdrawed from the electrode protector request of sending, wait utmost point layer three was got two devices and is returned the permission signal.Get any cover in the two devices when two cover utmost point layers three and return to electrode protector and allow to withdraw from signal, and the request in this electrode protector to withdraw from signal still be 1 o'clock, this cover protection is out of service.
And work as the serious or emergency of electrode protector self, and immediately this cover of locking protection, out of service.
Fig. 3 is that utmost point layer three is got the logic diagram that two devices judges whether to allow utmost point protection to withdraw from.
The protective device request of inputting among Fig. 3 is withdrawed from signal and is the request that electrode protector sends among Fig. 2 and withdraws from signal.Utmost point layer three is got two devices and is calculated the quantity of electrode protector that signal is withdrawed from the quantity of operating electrode protector and the request of sending.Press shown in Fig. 3 logic:
(1) quantity of the electrode protector of signal is withdrawed from input 3 for the request of sending;
(2) quantity of operating electrode protector and the request of the sending quantity that withdraws from the electrode protector of signal equates that input 2 is 1, otherwise is 0;
(3) if the quantity of operating electrode protector withdraws from the quantity of electrode protector of signal greater than the request of sending, further detect the simultaneity that signal is withdrawed from request that electrode protector sends.
Utmost point layer three is got two devices and detected request that electrode protector sends and withdraw from the method for signal simultaneity and be: utmost point layer three is got two devices and time-delay is set before allowing utmost point protection to withdraw from judging, in the time-delay window, if utmost point layer three is got the request that two devices received that all operating electrode protectors are sent and is withdrawed from signal, then the simultaneity condition is set up, and input 1 is 0; Otherwise be false, input 1 is 1.The span of time-delay window is 3～10ms, gets 5ms in the present embodiment.
As input 1=1, input 2=0 inputs at 3 ≠ 0 o'clock, withdraws from the logic judgement and is output as 1, and utmost point layer three is got two devices and allowed to withdraw from signal to sending the electrode protector transmission of asking to withdraw from signal.
Above embodiment only for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought that proposes according to the present invention, and any change of doing on the technical scheme basis all falls within the protection range of the present invention.
Claims (5)
1. supervision and the processing method of the redundant utmost point control of extra-high voltage direct-current plant failure, it is characterized in that: utmost point layer three is got two devices and electrode protector both-way communication, comprises the steps:
A, when certain cover electrode protector monitors two covers during redundant utmost point control plant failure, the request of sending out is withdrawed from signal and is got two devices to utmost point layer three, enters step b; When electrode protector monitors self serious or emergency, then need not request, this cover of locking is protected immediately, and is out of service;
B, utmost point layer three are got after request that two devices receives that the electrode protector of operation is sent withdraws from signal, and the electrode protector sum that computation requests withdraws from detects whether signal is withdrawed from the request of sending simultaneously of operating all electrode protectors, and following two kinds of situations are arranged:
(1) if not signal is withdrawed from the request of sending simultaneously of the electrode protector of all operations, then utmost point layer three is got electrode protector that two devices withdraws to request and is sent out and allow to withdraw from signal, and after electrode protector was received and allowed to withdraw from signal, this cover of locking is protected, and was out of service;
(2) if signal is withdrawed from the request of sending simultaneously of the electrode protector of all operations, utmost point layer three is got two devices and will be sent out to the electrode protector of all operations and forbid withdrawing from signal, after electrode protector is received and forbidden withdrawing from signal, continues operation.
2. supervision and the processing method of the redundant utmost point control of a kind of extra-high voltage direct-current as claimed in claim 1 plant failure, it is characterized in that: among the described step a, electrode protector judges that the condition that redundant utmost point control plant failure occurs is when at least one of following situations occuring:
(1) the equal fault of communication of electrode protector and the redundant utmost point control device of two covers;
(2) electrode protector monitor two the cover redundant utmost point control device all be not in state on duty;
(3) electrode protector monitors utmost point control device generation emergency on duty, and utmost point control system does not produce switching in delay time.
3. supervision and the processing method of the redundant utmost point control of a kind of extra-high voltage direct-current as claimed in claim 2 plant failure, it is characterized in that: in the described situation (3), the span of delay time is 5～20ms.
4. supervision and the processing method of the redundant utmost point control of a kind of extra-high voltage direct-current as claimed in claim 1 plant failure; it is characterized in that: among the described step b; utmost point layer three is got two devices and detected whether operating all electrode protectors request of sending simultaneously and withdraw from the method for signal and be: utmost point layer three is got two devices and time-delay is set before allowing utmost point protection to withdraw from judging; in the time-delay window; if utmost point layer three is got the request that two devices received that operating all electrode protectors are sent and is withdrawed from signal; then the simultaneity condition is set up; forbid that utmost point protection withdraws from; otherwise be false, electrode protector transmission from signal to the request of sending that withdraw from allows to withdraw from signal.
5. supervision and the processing method of the redundant utmost point control of a kind of extra-high voltage direct-current as claimed in claim 4 plant failure, it is characterized in that: the span of described time-delay window is 3～10ms.
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Cited By (6)
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| CN103490411A (en) * | 2013-09-09 | 2014-01-01 | 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 |
| 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 |
| CN105305386A (en) * | 2015-10-28 | 2016-02-03 | 国家电网公司 | Double-DC control protection system switching logic signal separation method |
| CN106684840A (en) * | 2017-01-20 | 2017-05-17 | 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 | Exit method under unavailable condition of DC protection in DC pole control systems |
| CN107919652A (en) * | 2017-12-12 | 2018-04-17 | 荣信汇科电气技术有限责任公司 | Two-out-of-three protection topological structure and method for converter valve of flexible direct current system |
| CN109888749A (en) * | 2019-03-20 | 2019-06-14 | 国网冀北电力有限公司检修分公司 | A kind of dc circuit breaker control method and device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490411A (en) * | 2013-09-09 | 2014-01-01 | 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 |
| 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 |
| CN105305386A (en) * | 2015-10-28 | 2016-02-03 | 国家电网公司 | Double-DC control protection system switching logic signal separation method |
| CN105305386B (en) * | 2015-10-28 | 2019-10-22 | 国家电网公司 | A kind of separation method of double DC control and protection system switch logic signals |
| CN106684840A (en) * | 2017-01-20 | 2017-05-17 | 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 | Exit method under unavailable condition of DC protection in DC pole control systems |
| CN107919652A (en) * | 2017-12-12 | 2018-04-17 | 荣信汇科电气技术有限责任公司 | Two-out-of-three protection topological structure and method for converter valve of flexible direct current system |
| CN107919652B (en) * | 2017-12-12 | 2023-08-11 | 荣信汇科电气股份有限公司 | Three-out-two protection topological structure and method of flexible direct current system converter valve |
| CN109888749A (en) * | 2019-03-20 | 2019-06-14 | 国网冀北电力有限公司检修分公司 | A kind of dc circuit breaker control method and device |
| CN109888749B (en) * | 2019-03-20 | 2021-04-09 | 国网冀北电力有限公司检修分公司 | Control method and device for direct current circuit breaker |
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