CN102663530A - Safety early warning and evaluating system for high-voltage direct current transmission system - Google Patents

Safety early warning and evaluating system for high-voltage direct current transmission system Download PDF

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CN102663530A
CN102663530A CN2012101687017A CN201210168701A CN102663530A CN 102663530 A CN102663530 A CN 102663530A CN 2012101687017 A CN2012101687017 A CN 2012101687017A CN 201210168701 A CN201210168701 A CN 201210168701A CN 102663530 A CN102663530 A CN 102663530A
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risk
equipment
early warning
current
unit
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CN2012101687017A
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CN102663530B (en
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罗炜
张鹏
汪洋
周翔胜
贺智
王朝硕
方苏
蒋峰伟
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中国南方电网有限责任公司超高压输电公司
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Abstract

The invention discloses a safety early warning and evaluating system for a high-voltage direct current transmission system. The safety early warning and evaluating system comprises an operating data and equipment information acquisition unit, a direct current system running risk analyzing and early warning unit, an operating strategy auxiliary analysis unit and a software support unit which are connected in sequence, wherein the direct current system running risk analyzing and early warning unit calls and loads the data acquired by the operating data and equipment information acquisition unit and performs computational analysis based on the reconstructed control logic and protection logic and an expert risk database; and the operating strategy auxiliary analysis unit formulates an operating strategy according to the system risk evaluation result obtained by the direct current system running risk analyzing and early warning unit. By adopting the technical scheme, the safety of the system can be analyzed in real time, risk of barriers or faults brought to the system is analyzed and evaluated, early warning is timely performed, the operating strategy is timely provided, the system risk is reduced, and the loss of equipment is reduced.

Description

HVDC transmission system safe early warning and evaluating system
Technical field
The present invention relates to D.C. high voltage transmission safe and intelligent field, be specifically related to a kind of safe early warning evaluating system of HVDC transmission system.
Background technology
Development along with the high voltage power transmission technology; Advantages such as HVDC transmission system is low with its circuit cost, the electric energy transmitting loss is low; Be applied to the aspects such as communication between the AC system of the transmission of electricity of remote high-power transmission of electricity, subsea cable, asynchronous operation on a large scale, obtained huge economic benefit.
But along with the fast development of HVDC transmission system, number of devices increases fast in the system, and system becomes increasingly complex, because converter involves great expense, in case generation equipment is damaged, will cause enormous economic loss simultaneously.Therefore need analyze in real time, and the risk that obstacle or fault are brought to system is analyzed and assessed, in time make early warning, to reduce risk, shortening idle time and to reduce the loss to the security of system.
Summary of the invention
The present invention is directed to the problem that prior art exists; A kind of safe early warning evaluating system that is applicable to high pressure and extra-high voltage DC transmission system is provided; With realization HVDC transmission system is carried out real time security analysis and risk assessment, and carry out early warning and propose the operation strategy.
A kind of HVDC transmission system safety assessment and early warning system, comprise successively the service data that connects with equipment information collection unit, the analysis of straight-flow system operation risk and prewarning unit, move tactful assistant analysis unit, software support unit.
Software support unit: be used to unit such as service data and equipment information collection unit, the analysis of straight-flow system operation risk and prewarning unit, the tactful assistant analysis of operation unit, examination and improvement unit the software support is provided.
Service data and equipment information collection unit: be used for all kinds of standard interfaces that provide through the software support unit; Carry out interface with the application system of HVDC transmission system and run unit; Obtain the data of application system of status information and run unit of operation information, each equipment of current HVDC transmission system; And data are carried out pre-service, form database, for analysis of straight-flow system operation risk and prewarning unit are carried out the early warning of security of system state and risk assessment provides the data support;
The straight-flow system operation risk is analyzed and prewarning unit: be used for the control of operating HVDC transmission system and related AC system thereof with protect that logic is called at native system, reconstruct; Transfer, load operating data and equipment information collection cell data database data; And carry out computational analysis with protection logic, expert's vulnerability database based on the steering logic of the HVDC transmission system of reconstruct and related AC system thereof; Divide current ruuning situation and forecast accident situation; Calculate the various faults that maybe possibly occur of the current existence of whole HVDC transmission system, the system risk that obstacle causes, and carry out risk assessment and early warning by current operation risk with based on two kinds of situation of forecast accident collecting system risk of the current method of operation of equipment risk;
Move tactful assistant analysis unit: be used for analyzing and the result of prewarning unit to the system risk assessment according to the straight-flow system operation risk, formulate the operation strategy, said operation strategy comprises control measure and solution;
The safe early warning evaluating system and the method for a kind of HVDC transmission system provided by the invention; Can analyze the security of HVDC transmission system in real time; And the risk that obstacle or fault are brought to system analyzed and assess; In time make early warning and propose the operation strategy, reduce the loss of system risk and minimizing equipment.
Description of drawings
Fig. 1 is the structural representation of the safe early warning evaluating system of a kind of HVDC transmission system of the present invention;
Fig. 2 is service data and the signal of equipment information collection cellular construction among Fig. 1;
Fig. 3 is that the straight-flow system operation risk is analyzed the structural representation with prewarning unit among Fig. 1;
Fig. 4 moves the processing flow chart of tactful assistant analysis unit based on the current operation risk of system among Fig. 1;
Fig. 5 moves the processing flow chart of tactful assistant analysis unit based on the forecast accident collecting system risk of the current method of operation of equipment risk among Fig. 1;
Fig. 6 is a kind of preferred embodiment structural representation of the safe early warning evaluating system of a kind of HVDC transmission system of the present invention.
Embodiment
Become increasingly complex to prior art mesohigh DC transmission system; Equipment is more and more; Need monitor in real time and risk assessment it; Reducing risk and to reduce the loss, the technical scheme that the embodiment of the invention provides is through obtain the data of application system of status information and run unit of operation information, each equipment of current HVDC transmission system in real time from the application system of HVDC transmission system and run unit.With the control of operating HVDC transmission system and related AC system thereof call in native system with the protection logic, reconstruct; The data that transfer, load operating obtained; And carry out computational analysis with protection logic, expert's vulnerability database based on the steering logic of the HVDC transmission system of reconstruct and related AC system thereof; Divide current ruuning situation and forecast accident situation; Calculate the various faults that maybe possibly occur of the current existence of whole HVDC transmission system, the system risk that obstacle causes, and carry out risk assessment and early warning by current operation risk with based on two kinds of situation of forecast accident collecting system risk of the current method of operation of equipment risk; And according to the result of risk assessment and early warning; HVDC transmission system is taked control measure and solution; And the work of system constantly examined and upgrade, in real time the security of HVDC transmission system being analyzed, and the risk that obstacle or fault are brought to system analyzed and assess; In time make early warning and propose the operation strategy, reduce the loss of system risk and minimizing equipment.
To combine each accompanying drawing at length to set forth below to the main realization principle of embodiment of the invention technical scheme, embodiment and to the beneficial effect that should be able to reach.
The structured flowchart of the safe early warning evaluating system of a kind of HVDC transmission system that reference is shown in Figure 1.Comprise successively the service data that connects with equipment information collection unit, the analysis of straight-flow system operation risk and prewarning unit, move tactful assistant analysis unit, software support unit.
For the complicated like this system of modern high voltage power transmisson system; Comprise HVDC transmission line, DC converter station and related AC system thereof; Produce numerous systems and equipment such as MIX system, SCADA system; To implement effective real-time data acquisition and processing to it; Be unableing to do without with the computer technology is the processing calculating on basis, and native system is provided with the software support unit, is used to service data and equipment information collection unit, the analysis of straight-flow system operation risk and prewarning unit, the tactful assistant analysis of operation unit, the software support is provided.And be used to realize following function:
(1) current conversion station and the HVDC transmission line of HVDC transmission system both sides are set up the HVDC transmission system model; Combing is carried out in main signal in the station in the venture analysis module and alarm trip(ping) circuit, and the mode through the HVDC transmission system model intuitively shows;
(2), define the alarm level of incident respectively from the consequence that possibly cause through combing system operation risk;
(3) analysis result to operation assistant analysis policy unit proposes feasible executive measure, and transfers the site disposal prediction scheme and analyze with similar accident confession operations staff over the years;
(4) provide flow process to instruct to the accident treatment process, carry out the corresponding work flow process with the prompting operations staff through display alarm zone between the HVDC transmission system model.
Referring to shown in Figure 2, service data and equipment information collection unit comprise data acquisition module, the legal inspection module of data, database and server.
All kinds of standard interfaces that data acquisition module provides through the software support unit; With HVDC transmission system; Comprise control system, protection system, measuring system, fault recording system; And other application system of run unit carries out interface, obtains the operation information of current HVDC transmission system, the status information of equipment, produce MIX system, SCADA system, patrol and examine acquisition such as information and technical supervision system about with the system being integral body; Machine account, historical defective, Back ground Information, information in service, historical failure and the accident, prerun data, the current method of operation that comprise various kinds of equipment in the HVDC transmission system; Repair apparatus and following turnaround plan, prediction load curve and other and move relevant information are like weather information on the way, for the data basis is established in the early warning of security of system state and risk assessment.
The legitimacy verification is carried out to data in processing such as the data that the legal verification module of data is obtained the data acquisition module are carried out synchronously, classification back, so that each data should be in its legal interval.And will send to database through the data of legal verification and store, form server, for analysis of straight-flow system operation risk and prewarning unit are carried out the early warning of security of system state and risk assessment provides the data support.
Consult Fig. 3, analysis of straight-flow system operation risk and prewarning unit comprise steering logic and protection logic module, expert's vulnerability database, the assessment of current operation risk and early warning module, based on the forecast accident collection module of the current method of operation of equipment risk.
Steering logic is connected the database of service data and equipment information collection unit with the protection logic module; With the control of operating HVDC transmission system and related AC system thereof call in native system with the protection logic, reconstruct; Transfer, load operating data and equipment information collection cell data database data carry out computing, said data comprise operation information, service data, load data, maintenance arranging data, fault SER, facility information, state estimation, probability of malfunction, fault level; And obtain prediction failure collection based on the equipment risk.Facility information is loaded on non electrical quantity protection logic module, carries out computing.
Expert's vulnerability database: connect steering logic and be connected with the protection logic module; Form expert's vulnerability database according to the logic of the control system that possibly cause obstacle or accident, relay protection and aut.eq. and all kinds of non electrical quantity protection definite values of definite value and equipment; Result after the computing of Loading Control logical and protection logic module; Calculate contrast with protection logic, definite value, be used to current operation risk assessment and early warning module, carry out risk assessment and early warning based on the forecast accident collection module of the current method of operation of equipment risk.
Current operation risk assessment is connected expert's vulnerability database with the early warning module; Be used for data based on expert's vulnerability database; And the result after steering logic that loads in the expert database and the computing of protection logic module; Calculate comparing result, and carry out risk assessment and early warning with protection logic, definite value based on current operation risk.System is comprehensively calculated under the current ruuning situation and under the forecast accident situation; AC system superpotential overload risk in system loading loss risk that fault such as the locking of whole HVDC transmission system single valve group, one pole locking or bipolar locking, limited load, brownout operation, alternating-current field line tripping or obstacle cause and the social risk that possibly cause thereof, the current conversion station, equipment loss risk be with the personal injury risk etc., and carry out risk assessment and early warning based on current system operation risk with based on the forecast accident collecting system risk of the current method of operation of equipment risk.Above-mentioned steering logic comprises that with the protection logic direct current station control logic, level control/level protection logic, group control/group protection logic, Exchange Station control/exchange protection logic, non electrical quantity protection logic.
Above-mentionedly carry out risk assessment and early warning based on current operation risk; Specifically refer to current HVDC transmission system is kept watch on assessment automatically, assess from bottom to top and early warning for three grades by the assessment of station equipment level, the assessment of current conversion station operation risk and early warning, whole HVDC transmission system respectively:
Station equipment level assessment: at first be to each main equipment in the HVDC transmission system; Comprise primary equipment, secondary device such as converter power transformer, converter valve, control protection equipment etc.; And important utility appliance such as valve cooling system, low-voltage direct system etc. carry out modeling; And give that it gathers through service data and equipment information collection unit normally move closely bound up operation parameter and state parameter with equipment; Operation parameter and the state parameter current according to each equipment are set up the current operation risk index of this equipment defective tree-model.The operation parameter includes but not limited to equipment voltage, electric current, frequency, harmonic content, valve trigger angle etc.; And with compare with actual preset warning value consistent and associated external site environment parameter such as temperature, weather etc., calculate the nargin of its arrival warning value according to each relevant rules; The historical record of production of on the one hand related this equipment of equipment state; But be not limited to examine record, historical defective, historical patrol record, same category of device accident default data surely like Unit account of plant, prerun; The current running status record of associate device on the other hand is like oil temperature, line temperature, oil level, tap gear and state, trigger angle, SF6 pressure, online oil chromatography, action frequency, the online monitoring data and the defective etc. of patrolling and examining discovery.Facility information comprises converter power transformer oil temperature, line temperature, SF6 force value, Buchholz relay etc.
Set up the current operation risk index of this equipment defective tree-model; Concrete grammar is following: the state that shows whole equipment with the set of single component state in the equipment; Analyze the influence of part, unit failure to equipment failure; Comprising human factor and environmental baseline, definition element defective index; Through fault data, and the fault data of provided as one homogeneous element in other HVDC transmission system, judge the probability of its fault to this element in former years; The order of severity that possibly cause the straight-flow system accident according to status and the fault of this element in system; Judge the risk of its influence operation, promptly risk=probability of malfunction * fault seriousness is divided into four ranks; Devoid of risk, average risk, material risk, urgent risk; Wherein, devoid of risk representes that this element does not have any defective and fault, and average risk representes that there is the phenomenon that is not inconsistent with normal operating condition in this element; But in half a year, do not handle the stable operation that yet can not influence HVDC transmission system; Material risk representes that this element existence has serious threat to the person, electrical network and equipment, still can adhere to operation, the defective that untimely processing might cause the accident; Urgent risk representes that this element exists the safe operation of generation direct threats also to need to handle immediately, possibly cause the defective of accidents such as device damage, personal injury, large-area power-cuts, fire at any time; The element that operation risk is the highest will be represented the operation risk grade of this equipment, participate in the assessment of current conversion station operation risk, and other element defective of equipment also can gather, inquire about through fault tree.
Current conversion station operation risk assessment and early warning: gather the alternating-current field equipment that primary equipment, secondary device and the important utility appliance at full station include but not limited to dc fields equipment and link; And the equipment operation risk assessment of corresponding control, protection screen cabinet etc.; The method of operation and maintenance mode according to current high-voltage direct current and AC system; The steering logic of reconstruct HVDC transmission system and protection logic in software architecture; With the defective related information assignment of equipment in control and protection logic; Control that the analytical equipment defective possibly cause and the action consequence of protection in the logic are given early warning for the equipment deficiency of the consequence of the normal operation trend of influential current conversion station; Simultaneously, gather the current operation risk analysis that is present in other defective element in the equipment in the station, and its consequence that possibly cause is carried out early warning;
System-level assessment: the current operation information and the status information of equipment that gather interior each current conversion station of HVDC transmission system and HVDC transmission line; Assignment is given early warning in the control and protection logic of reconstruct to the equipment deficiency that influences the normal operation trend consequence of whole HVDC transmission system.
With reference to shown in Figure 4, in that current operation risk carries out in risk assessment and the early warning situation based on system, control measure and the solution of moving the formulation of tactful assistant analysis unit specifically comprise:
Treatment measures: in fault the possible loop of combing fault, back takes place, in the current conversion station model, show signal, the alarm loop of fault and the disposal route that should take through software interface;
Maintenance is arranged: the inspection that after accident takes place, should carry out, comprise the primary equipment state, and perfect the inspection of valve group running status, control protection equipment state, inspection transient state failure wave-recording situation, assistant analysis culprit;
Accident prediction: the state of assistant analysis accident, through visual prediction scheme, instruct the operations staff to check the corresponding master device state according to field software, drawing, the photo of prediction scheme flow process and faulty equipment.
The forecast accident collection module based on the current method of operation of equipment risk among Fig. 3 connects expert's vulnerability database; Prediction failure collection according to based on the equipment risk carries out Treatment Analysis based on the steering logic of the AC system of HVDC transmission system and association thereof with protection logic, expert's vulnerability database etc.; Comprise station level control and protection logic, the control of utmost point level and protection logic, the control of group level and protection logic, alternating-current field control and protection logic; System is comprehensively calculated under the current ruuning situation and under the forecast accident situation; AC system superpotential overload risk in system loading loss risk that fault such as the locking of whole HVDC transmission system single valve group, one pole locking or bipolar locking, limited load, brownout operation, alternating-current field line tripping or obstacle cause and the social risk that possibly cause thereof, the current conversion station, equipment loss risk be with the personal injury risk etc., and carry out risk assessment and early warning based on the forecast accident collecting system risk of the current method of operation of equipment risk.
Forecast accident collecting system risk based on the current method of operation of equipment risk is carried out risk assessment and early warning, specifically comprises:
According to the current method of operation, with current operating primary equipment, secondary device and important utility appliance, and the system operational parameters fault, be made as the normal single-element that moves of the system that possibly influence respectively, list forecast accident in and concentrate.
With the individual equipment is element; Successively the imagination one of them element occur urgent defective out of service after; According to the control and the possible consequence of protection logic analysis of reconstruct, the equipment that wherein possibly influence the HVDC transmission system operation is carried out classification, be respectively redundance unit; Visual plant, key equipment; Wherein, after redundance unit representes that this equipment is out of service, do not influence the normal operation of HVDC transmission system; Visual plant is defined as this equipment possibly influence some function of straight-flow system, but can not cause its tripping operation; It is in a single day out of service that key equipment is defined as this equipment, will cause the serious consequence of single valve group, one pole even bipolar trip.
With reference to Fig. 5; Forecast accident collection module based on the current method of operation of equipment risk is carried out in risk assessment and the early warning; Moving control measure and the solution formulated tactful assistant analysis unit specifically comprises: based on the operation risk identification of equipment risk anticipation: have the mode of connection now to HVDC transmission system; Set up HVDC transmission system equipment imagination fault collection; Carry out likelihood of failure analysis and failure effect analysis for the fault in the imaginary fault collection, draw the equipment value-at-risk of this fault;
Based on imaginary fault, the HVDC transmission system after the equipment fault is simulated, analyze the HVDC transmission system running status;
Carry out the failure effect of imaginary equipment is analyzed through venture analysis;
Carry out identification and control in advance through the value-at-risk of this equipment, propose the operation aid decision making;
Proposition possibly cause the cluster tool of one pole, bipolar trip risk: repeat all devices value-at-risk in the above-mentioned measures analysis HVDC transmission system, set up HVDC transmission system equipment risk Metrics;
To risk equipment; The preparatory control means of risk is proposed: risk is obviously become big excessive risk value equipment propose preparatory control means; Comprise and arrange turnaround plan, the change method of operation, reduction to carry load, shorten the tour cycle in advance; Adopt infrared measurement of temperature, carry out the equipment breakdown rehearsal, the transcription equipment operational factor.
A kind of preferred embodiment of the present invention; As shown in Figure 6; Also comprise examination and improve the unit that said examination is connected with prewarning unit, the tactful assistant analysis of operation unit with equipment information collection unit, the analysis of straight-flow system operation risk with service data with the improvement unit, the software support unit connects respectively;
Examination and improvement updating block: be used for each module of native system is upgraded, changed and examines.
Examination with improve updating block to each unit of native system with module is upgraded, change and ruuning situation are examined, assess and early warning timely and effectively HVDC transmission system is carried out security risks.
HVDC transmission system safe early warning provided by the invention and evaluating system are applicable to HVDC transmission system are monitored and the early warning assessment in real time, also be applicable to simultaneously UHV (ultra-high voltage), extra-high voltage DC transmission system are monitored and the early warning assessment in real time.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.

Claims (10)

1. HVDC transmission system safe early warning and evaluating system is characterized in that: comprise the service data that connects successively with equipment information collection unit, the analysis of straight-flow system operation risk and prewarning unit, move tactful assistant analysis unit, software support unit;
Software support unit: be used to service data and equipment information collection unit, the analysis of straight-flow system operation risk and prewarning unit, operation tactful assistant analysis unit provides the software support;
Service data and equipment information collection unit: be used for all kinds of standard interfaces that provide through the software support unit; Carry out interface with the application system of DC transmission system and run unit; Obtain the data of application system of status information and run unit of operation information, each equipment of current DC transmission system; And data are carried out pre-service, form database, for analysis of straight-flow system operation risk and prewarning unit are carried out the early warning of security of system state and risk assessment provides the data support;
The straight-flow system operation risk is analyzed and prewarning unit: be used for the steering logic of operating DC transmission system and related AC system thereof with protect that logic is called at native system, reconstruct; Transfer, load operating data and equipment information collection cell data database data; And carry out computational analysis with protection logic, expert's vulnerability database based on the steering logic of the HVDC transmission system of reconstruct and related AC system thereof; Divide current ruuning situation and forecast accident situation; Calculate the various faults that maybe possibly occur of the current existence of whole HVDC transmission system, the system risk that obstacle causes, and carry out risk assessment and early warning by the current operation risk of system with based on two kinds of situation of forecast accident collecting system risk of the current method of operation of equipment risk;
Move tactful assistant analysis unit: be used for analyzing and the result of prewarning unit to the system risk assessment according to the straight-flow system operation risk, formulate the operation strategy, said operation strategy comprises control measure and solution.
2. HVDC transmission system safe early warning according to claim 1 and evaluating system is characterized in that: analysis of said straight-flow system operation risk and prewarning unit comprise steering logic and protection logic module, expert's vulnerability database, the assessment of current operation risk and early warning module, based on the forecast accident collection module of the current method of operation of equipment risk;
Said steering logic is connected service data and equipment information collection unit with the protection logic module; Be used for the control of operating HVDC transmission system and related AC system thereof call at native system with the protection logic, reconstruct, transfer, load operating data and equipment information collection cell data database data carry out computing; Facility information is loaded on non electrical quantity protection logic module, carries out computing;
Expert's vulnerability database: connect control logic and protection logic module; Form expert's vulnerability database based on the logic of control system, relay protection and the automatics that possibly cause obstacle or accident and all kinds of non electrical quantity protection definite values of definite value and equipment; Result after the computing of Loading Control logical AND protection logic module; Calculate contrast with protection logic, definite value, be used to current operation risk assessment and early warning module, carry out risk assessment and early warning based on the forecast accident collection module of the current method of operation of equipment risk;
Said current operation risk assessment is connected said expert's vulnerability database with the early warning module; Be used for data based on expert's vulnerability database; And the result after steering logic that loads in the expert database and the computing of protection logic module; Calculate comparing result, and carry out risk assessment and early warning with protection logic, definite value based on current operation risk;
The forecast accident collection module of the said current method of operation based on the equipment risk connects said expert's vulnerability database; Carry out the data of steering logic and protection logic module and expert's vulnerability database according to prediction failure collection, and carry out risk assessment and early warning based on the forecast accident collecting system risk of the current method of operation of equipment risk based on the equipment risk.
3. HVDC transmission system safe early warning according to claim 2 and evaluating system; It is characterized in that: said current operation risk assessment is carried out risk assessment and early warning with the early warning module based on current operation risk; Specifically refer to current HVDC transmission system is kept watch on assessment automatically, assess from bottom to top and early warning for three grades by the assessment of station equipment level, the assessment of current conversion station operation risk and early warning, whole HVDC transmission system respectively:
Station equipment level assessment: at first be that each primary equipment, secondary device and important auxiliary equipment in the HVDC transmission system are carried out modeling; And give that it gathers through service data and equipment information collection unit normally move closely bound up operation parameter and state parameter with equipment; Based on each equipment current operation parameter and state parameter, set up the current operation risk index of this equipment defective tree-model;
Assessment of current conversion station operation risk and early warning: the primary equipment, secondary device and the important utility appliance operation risk assessment that gather full station; The method of operation and maintenance mode according to current high-voltage direct current and AC system; The steering logic of reconstruct HVDC transmission system and protection logic in software architecture; With the defective related information assignment of equipment in control and protection logic; Control that the analytical equipment defective possibly cause and the action consequence of protection in the logic are given early warning for the equipment deficiency of the consequence of the normal operation trend of influential current conversion station; Simultaneously, gather the current operation risk analysis that is present in other defective element in the equipment in the station, and its consequence that possibly cause is carried out early warning;
System-level assessment: the current operation information and the status information of equipment that gather interior each current conversion station of HVDC transmission system and HVDC transmission line; Assignment is given early warning in the control and protection logic of reconstruct to the equipment deficiency that influences the normal operation trend consequence of whole HVDC transmission system.
4. HVDC transmission system safe early warning according to claim 3 and evaluating system; It is characterized in that: said operation parameter comprises equipment voltage, electric current, frequency, harmonic content, valve trigger angle etc.; And with actual consistent also associated external site environment parameter; The preset warning value that specifically comprises temperature, weather compares, and calculates the nargin that it arrives warning value according to each relevant rules; Facility information comprises converter power transformer oil temperature, line temperature, SF6 force value, Buchholz relay etc.;
The said current operation risk index of this equipment defective tree-model of setting up; Specifically comprise: the state that shows whole equipment with the set of single component state in the equipment; Analyze the influence of part, unit failure to equipment failure; Comprising human factor and environmental baseline, definition element defective index; Through fault data, and the fault data of provided as one homogeneous element in other HVDC transmission system, judge the probability of its fault to this element in former years; The order of severity that possibly cause the straight-flow system accident according to status and the fault of this element in system; Judge the risk of its influence operation, promptly risk=probability of malfunction * fault seriousness is divided into four ranks; Devoid of risk, average risk, material risk, urgent risk; Wherein, devoid of risk representes that this element does not have any defective and fault, and average risk representes that there is the phenomenon that is not inconsistent with normal operating condition in this element; But in half a year, do not handle the stable operation that yet can not influence HVDC transmission system; Material risk representes that this element existence has serious threat to the person, electrical network and equipment, still can adhere to operation, the defective that untimely processing might cause the accident; Urgent risk representes that this element exists the safe operation of generation direct threats also to need to handle immediately, possibly cause the defective of accidents such as device damage, personal injury, large-area power-cuts, fire at any time; The element that operation risk is the highest will be represented the operation risk grade of this equipment, participate in the assessment of current conversion station operation risk, and other element defective of equipment also can gather, inquire about through fault tree.
5. HVDC transmission system safe early warning according to claim 4 and evaluating system, peculiar being: control measure and solution that the tactful assistant analysis of said operation unit is formulated specifically comprise:
Treatment measures: in fault the possible loop of combing fault, back takes place, in the current conversion station model, show signal, the alarm loop of fault and the disposal route that should take through software interface;
Inspection is arranged: the inspection that after accident takes place, should carry out, comprise the primary equipment state, and perfect the inspection of valve group running status, control protection equipment state, inspection transient state failure wave-recording situation, assistant analysis culprit;
Accident prediction: the state of assistant analysis accident, through visual accident prediction, instruct the operations staff to check the corresponding master device state according to field software, drawing, the photo of prediction scheme flow process and faulty equipment.
6. HVDC transmission system safe early warning according to claim 2 and evaluating system; It is characterized in that: the forecast accident collection module of the said current method of operation based on the equipment risk is carried out risk assessment and early warning based on the forecast accident collecting system risk of the current method of operation of equipment risk, specifically comprises:
According to the current method of operation, with current operating primary equipment, secondary device and important utility appliance, and the system operational parameters fault, be made as the normal single-element that moves of the system that possibly influence respectively, list forecast accident in and concentrate;
With the individual equipment is element; Successively the imagination one of them element occur urgent defective out of service after; According to the control and the possible consequence of protection logic analysis of reconstruct, the equipment that wherein possibly influence the HVDC transmission system operation is carried out classification, be respectively redundance unit; Visual plant, key equipment; Wherein, after redundance unit representes that this equipment is out of service, do not influence the normal operation of HVDC transmission system; Visual plant is defined as this equipment possibly influence some function of straight-flow system, but can not cause its tripping operation; It is in a single day out of service that key equipment is defined as this equipment, will cause the serious consequence of single valve group, one pole even bipolar trip.
7. HVDC transmission system safe early warning according to claim 6 and evaluating system is characterized in that: control measure and solution that the tactful assistant analysis of said operation unit is formulated specifically comprise:
Operation risk identification based on the anticipation of equipment risk: to the existing mode of connection of HVDC transmission system; Set up HVDC transmission system equipment imagination fault collection; Carry out likelihood of failure analysis and failure effect analysis for the fault in the imaginary fault collection, draw the equipment value-at-risk of this fault;
Based on imaginary fault, the HVDC transmission system after the equipment fault is simulated, analyze the HVDC transmission system running status;
Carry out the failure effect of imaginary equipment is analyzed through venture analysis;
Carry out identification and control in advance through the value-at-risk of this equipment, propose the operation aid decision making;
Proposition possibly cause the cluster tool of one pole, bipolar trip risk: repeat all devices value-at-risk in the above-mentioned measures analysis HVDC transmission system, set up HVDC transmission system equipment risk Metrics;
To risk equipment; The preparatory control means of risk is proposed: risk is obviously become big excessive risk value equipment propose preparatory control means; Comprise and arrange turnaround plan, the change method of operation, reduction to carry load, shorten the tour cycle in advance; Adopt infrared measurement of temperature, carry out the equipment breakdown rehearsal, the transcription equipment operational factor.
8. HVDC transmission system safe early warning according to claim 2 and evaluating system is characterized in that: said obstacle, fault specifically comprise the locking of whole HVDC transmission system single valve group, one pole locking or bipolar locking, limited load, brownout operation, AC system line tripping; Said system risk specifically comprises system loading loss risk and the social risk that possibly cause, the interior AC system superpotential overload risk of current conversion station, equipment loss risk and personal injury risk; Said steering logic comprises specifically that with the protection logic module direct current station control logic, level control/level protection logic, group control/group protection logic, Exchange Station control/exchange protection logic, non electrical quantity protection logic.
9. HVDC transmission system safe early warning according to claim 1 and evaluating system is characterized in that: said service data comprises the legal inspection module of data acquisition module, data, database and the server that is connected successively with the equipment information collection unit;
Data acquisition module: be used for all kinds of standard interfaces that provide through the software support unit; Carry out interface with the application system of control system, protection system, measuring system, fault recording system and run unit, obtain the data of application system of status information and run unit of operation information, each equipment of current HVDC transmission system;
The legal verification module of data: be used for the data that the data acquisition module obtains are handled and carried out the legitimacy verification, said data handled, comprise data are carried out synchronously, classified; Said legitimacy verification specifically instigates each data should be in its legal interval;
Database: be used for to storing through the data of the legal calibration mode block check of data;
Server: be used for the data of database are offered analysis of straight-flow system operation risk and prewarning unit, for the analysis of straight-flow system operation risk and prewarning unit are carried out the early warning of security of system state and risk assessment provides data to support.
10. based on arbitrary described HVDC transmission system safe early warning of claim 1 to 9 and evaluating system; It is characterized in that: also comprise examination and improve the unit that said examination is connected with prewarning unit, the tactful assistant analysis of operation unit with equipment information collection unit, the analysis of straight-flow system operation risk with service data with the improvement unit, the software support unit connects respectively;
Examination and improvement updating block: be used for each module of native system is upgraded, changed and examines.
CN201210168701.7A 2012-05-25 2012-05-25 HVDC (High Voltage Direct Current) transmission system safe early warning and evaluating system CN102663530B (en)

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