CN102856983B - 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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- CN102856983B CN102856983B CN201210378389.4A CN201210378389A CN102856983B CN 102856983 B CN102856983 B CN 102856983B CN 201210378389 A CN201210378389 A CN 201210378389A CN 102856983 B CN102856983 B CN 102856983B
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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 extra-high voltage direct-current transmission field, particularly a kind of extra-high voltage direct-current is controlled supervision and the fault handling method of protection system.
Background technology
The feature of extra-high voltage DC transmission system is that every end current conversion station has 4 12 pulse conversion devices, is 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 the control device of every layer all adopts dual redundant configuration, and protective device adopts three to get two redundant configuration.The typical one pole of extra-high voltage direct-current is controlled protection system configuration as shown in Figure 1.
Three cover electrode protectors of the every utmost point of extra-high voltage direct-current are separate, separately by control LAN net respectively with the utmost point control device communication of two cover redundancies, and the running status of real time monitoring utmost point control device.Redundancy utmost point control device is a set of on duty, a set of standby, after device on duty breaks down, can in 1ms, carry out system switching, guarantees that cover more intact in two cover utmost point control devices is in state on duty.
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 of direct current, direct voltage, extinguish angle is arranged in utmost point layer control device, and utmost point control device produces Trigger Angle instruction, is handed down to converter control device.When the utmost point control device of dual redundancy is all during fault, direct current system loses closed-loop adjustment function, and this extremely must be stopped transport.
The second technology path is that the closed-loop adjustment function of direct current, direct voltage, extinguish angle is arranged in converter layer control device, and utmost point control device produces direct current instruction, is handed down to converter control device.Adopt this technology path, when the utmost point control device of dual redundancy is all during fault, converter control device can keep the current-order before fault, maintains closed-loop adjustment function, and the direct current system state of still can remaining stationary continues operation in theory.
Existing extra-high voltage direct-current is controlled protection system supervision method and is derived from conventional DC control and protection system, and when protective device loses the communication with control device on duty, this cover of locking is protected immediately, out of service; After the protective device of redundancy is all out of service, the unprotect operation logic corresponding direct current system of stopping transport.This supervision and fault handling method are applicable to above-mentioned functions and distribute the first technology path, because while there is redundancy utmost point control plant failure, 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 distributed to the second technology path for function, while there is redundancy utmost point control plant failure, even if converter control device possesses the ability of the direct current system of maintaining operation, still can cause the utmost point to be stopped transport because of the operation of utmost point layer unprotect.
Summary of the invention
Object of the present invention; be to provide a kind of supervision and processing method of extra-high voltage direct-current redundancy utmost point control plant failure; it can avoid monitoring after redundancy 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, make redundancy utmost point control plant failure after this utmost point still can maintain operation.
In order to reach above-mentioned purpose, solution of the present invention is:
Supervision and the processing method of extra-high voltage direct-current redundancy utmost point control 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 is while monitoring two cover redundancy utmost point control plant failures, the request of sending out is exited signal and is got two devices to utmost point layer three, enters step b; When electrode protector monitors self serious or emergency, without request, this cover of locking is protected immediately, out of service;
B, utmost point layer three are got the request that two devices receives that the electrode protector of operation is sent and are exited after signal, and the electrode protector sum that computation requests exits detects whether signal is exited in the request of simultaneously sending of operating all electrode protectors, has following two kinds of situations:
(1) if not signal is exited in the request of sending of the electrode protector of all operations simultaneously, utmost point layer three is got electrode protector that two devices exits to request and is sent out and allow to exit signal, and electrode protector receives and allow to exit after signal, and this cover of locking is protected, out of service;
(2) if signal is exited in the request of sending of the electrode protector of all operations simultaneously, utmost point layer three is got two devices and will be sent out and forbid exiting signal to the electrode protector of all operations, and electrode protector is received and forbidden exiting after signal, continues operation.
In above-mentioned steps a, the condition that electrode protector judgement redundancy utmost point control plant failure occurs is while at least there is one of following situations:
(1) the equal fault of communication of electrode protector and two cover redundancy utmost point control devices;
(2) electrode protector monitors two cover redundancy utmost point control devices all 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 above-mentioned situation (3), the span of delay time is 5～20ms.
In above-mentioned steps b; utmost point layer three is got two devices and is detected whether operating all electrode protectors request of simultaneously sending and exit the method for signal and be: utmost point layer three is got two devices, before judgement allows utmost point protection to exit, time delay is set; in 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 exited signal; simultaneity condition is set up; forbid that utmost point protection exits; otherwise be false, electrode protector transmission from signal to the request of sending that exit allows to exit signal.
The span of above-mentioned time delay window is 3～10ms.
Adopt after 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 of converter control layer and controls protection system; make extra-high voltage direct-current system when there is redundancy utmost point control plant failure; can all not exit and cause the utmost point to be stopped transport because of utmost point protection; the state 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.
Accompanying drawing explanation
Fig. 1 is that the typical one pole of extra-high voltage direct-current is controlled protection system allocation plan;
Fig. 2 is the logic diagram of electrode protector judgement redundancy utmost point control plant failure;
Wherein, arrow representative data flows to, and the logic of time delay effective efficiency is when being input as 1 and keeping surpassing delay value, is output as 1;
Fig. 3 is that utmost point layer three is got the logic diagram that two devices judgement allows/forbid utmost point protection to exit;
Wherein, arrow representative data flows to.
Embodiment
Below with reference to accompanying drawing, technical scheme of the present invention is elaborated.
The typical one pole of extra-high voltage direct-current is as shown in Figure 1 controlled protection system configuration, and 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.
First the present invention 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 of electrode protector judgement redundancy utmost point control plant failure as shown in Figure 2.
By "or" logic, while there is one of following situations, electrode protector judgement redundancy utmost point control plant failure or redundancy communication fault occur, and get the two devices request of sending exit signal to two cover utmost point layers three:
(1) the equal fault of communication of electrode protector and two cover redundancy utmost point control devices;
(2) electrode protector monitors two cover redundancy utmost point control devices all not in state on duty;
(3) electrode protector monitors utmost point control device generation emergency on duty, and after time delay, does not produce the switching of utmost point control system, and fault condition is still set up.The span of delay time is 5～20ms, gets 15ms in the present embodiment.
The electrode protector request of sending is exited after signal, and wait utmost point layer three is got two devices and returned to permission signal.When two cover utmost point layers three, get any a set of in two devices and return and allow to exit signal to electrode protector, and the request in this electrode protector to exit signal be still 1 o'clock, this cover protection is out of service.
And when electrode protector self is serious or emergency, this cover of locking protection immediately, 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 exit.
The protective device request of inputting in Fig. 3 is exited signal and is the request that in Fig. 2, electrode protector sends and exits signal.Utmost point layer three is got two devices and is calculated the quantity of electrode protector that signal is exited in the quantity of operating electrode protector and the request of sending.Press shown in Fig. 3 logic:
(1) input 3 is the quantity that the electrode protector of signal is exited in the request of sending;
(2) quantity that the electrode protector of signal is exited in the quantity of operating electrode protector and the request of sending equates, input 2 is 1, otherwise is 0;
(3), if the quantity of operating electrode protector is greater than the quantity of electrode protector that signal is exited in the request of sending, further detect the simultaneity that signal is exited in request that electrode protector sends.
Utmost point layer three is got two devices and is detected request that electrode protector sends and exit the method for signal simultaneity and be: utmost point layer three is got two devices, before judgement allows utmost point protection to exit, time delay is set, in 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 exited signal, 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, exits logic judgement and is output as 1, and utmost point layer three is got two devices asks the electrode protector transmission of exiting signal to allow to exit signal to sending.
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 proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection range of the present invention.
Claims (5)
1. supervision and the processing method of extra-high voltage direct-current redundancy utmost point control plant failure, 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 is while monitoring two cover redundancy utmost point control plant failures, the request of sending out is exited signal and is got two devices to utmost point layer three, enters step b; When electrode protector monitors self serious or emergency, without request, this cover of locking is protected immediately, out of service;
B, utmost point layer three are got the request that two devices receives that the electrode protector of operation is sent and are exited after signal, and the electrode protector sum that computation requests exits detects whether signal is exited in the request of simultaneously sending of operating all electrode protectors, has following two kinds of situations:
(1) if not signal is exited in the request of sending of the electrode protector of all operations simultaneously, utmost point layer three is got electrode protector that two devices exits to request and is sent out and allow to exit signal, and electrode protector receives and allow to exit after signal, and this cover of locking is protected, out of service;
(2) if signal is exited in the request of sending of the electrode protector of all operations simultaneously, utmost point layer three is got two devices and will be sent out and forbid exiting signal to the electrode protector of all operations, and electrode protector is received and forbidden exiting after signal, continues operation.
2. supervision and the processing method of a kind of extra-high voltage direct-current redundancy utmost point control plant failure as claimed in claim 1, is characterized in that: in described step a, the condition that electrode protector judgement redundancy utmost point control plant failure occurs is while at least there is one of following situations:
(1) the equal fault of communication of electrode protector and two cover redundancy utmost point control devices;
(2) electrode protector monitors two cover redundancy utmost point control devices all not in state on duty;
(3) electrode protector monitors utmost point control device generation emergency on duty, and utmost point control device does not produce switching in delay time.
3. supervision and the processing method of a kind of extra-high voltage direct-current redundancy utmost point control plant failure as claimed in claim 2, is characterized in that: in described situation (3), the span of delay time is 5～20ms.
4. supervision and the processing method of a kind of extra-high voltage direct-current redundancy utmost point control plant failure as claimed in claim 1, it is characterized in that: in described step b, utmost point layer three is got two devices and is detected whether operating all electrode protectors request of simultaneously sending and exit the method for signal and be: utmost point layer three is got two devices, before judgement allows utmost point protection to exit, time delay is set, in 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 exited signal, simultaneity condition is set up, forbid that utmost point protection exits, otherwise be false, electrode protector transmission from signal to the request of sending that exit allows to exit signal.
5. supervision and the processing method of a kind of extra-high voltage direct-current redundancy utmost point control plant failure as claimed in claim 4, is characterized in that: the span of described time delay window is 3～10ms.
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| 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 |
| CN104767196B (en) * | 2015-04-02 | 2017-02-22 | 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 |
| 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 |
| CN106684840B (en) * | 2017-01-20 | 2018-11-23 | 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 is exported when direct current protecting is unavailable in a kind of direct current polar control 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 |
| 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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| JP2003052123A (en) * | 2001-08-08 | 2003-02-21 | Mitsubishi Electric Corp | Controller of ac-dc power converter |
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