CN102663530B - HVDC (High Voltage Direct Current) transmission system safe early warning and evaluating system - Google Patents
HVDC (High Voltage Direct Current) transmission system safe early warning and evaluating system Download PDFInfo
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Abstract
The invention discloses a kind of HVDC (High Voltage Direct Current) transmission system safe early warning and evaluating system, comprise the service data that connects successively and equipment information collection unit, straight-flow system operation risk are analyzed and prewarning unit, operation reserve assistant analysis unit, software support unit.The data that the analysis of straight-flow system operation risk and prewarning unit are transferred, load operating data and equipment information collection unit obtain; and carry out computational analysis based on the steering logic reconstructed and relay protective scheme, expert's vulnerability database; operation reserve assistant analysis unit analyzes the result assessed system risk with prewarning unit according to straight-flow system operation risk, formulate operation reserve.Adopt technical scheme of the present invention, can analyze the security of system in real time, and assessment and analysis is carried out to the risk that obstacle or fault bring to system, make early warning in time and propose operation reserve, reduce system risk and reduce equipment loss.
Description
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 (High Voltage Direct Current) transmission system.
Background technology
Along with the development of high voltage power transmission technology, the advantages such as HVDC (High Voltage Direct Current) transmission system is low with its circuit cost, electric energy transmitting loss is low, by the aspect such as communication be applied on a large scale between the AC system of remote bulk power transmission, subsea cable transmission of electricity, asynchronous operation, achieve huge economic benefit.
But along with the fast development of HVDC (High Voltage Direct Current) transmission system, in system, number of devices increases fast, systems grow is complicated, simultaneously because converter involves great expense, once the damage of the equipment of generation, will cause huge economic loss.Therefore need to analyze the security of system in real time, and assessment and analysis is carried out to the risk that obstacle or fault bring to system, make early warning in time, to reduce risk, shorten idle time and reduce the loss.
Summary of the invention
The present invention is directed to prior art Problems existing, a kind of safe early warning evaluating system being applicable to high pressure and extra-high voltage DC transmission system is provided, to realize carrying out real time security analysis and risk assessment to HVDC (High Voltage Direct Current) transmission system, and carry out early warning and propose operation reserve.
A kind of HVDC (High Voltage Direct Current) transmission system safety assessment and early warning system, comprise the service data connected successively and analyze and prewarning unit, operation reserve assistant analysis unit, software support unit with equipment information collection unit, straight-flow system operation risk.
Software support unit: for for service data and equipment information collection unit, the analysis of straight-flow system operation risk and prewarning unit, operation reserve assistant analysis unit, examine and improve the unit such as unit software support is provided.
Service data and equipment information collection unit: for all kinds of standard interfaces provided by software support unit, interface is carried out with the application system of HVDC (High Voltage Direct Current) transmission system and run unit, obtain the data of the operation information of current HVDC (High Voltage Direct Current) transmission system, the status information of each equipment and the application system of run unit, and pre-service is carried out to data, formation database, carries out security of system status early warning for the analysis of straight-flow system operation risk and prewarning unit and risk assessment provides data supporting;
Straight-flow system operation risk is analyzed and prewarning unit: for operating HVDC (High Voltage Direct Current) transmission system and the control and scheduling co-design logic of AC system that associates thereof being called in the present system, reconstruct, transfer, load operating data and equipment information collection cell data database data, and based on the HVDC (High Voltage Direct Current) transmission system of reconstruct and the steering logic of AC system of association thereof and relay protective scheme, expert's vulnerability database carries out computational analysis, divide current operating situation and forecast accident situation, calculate the various faults that maybe may occur of the current existence of whole HVDC (High Voltage Direct Current) transmission system, the system risk that obstacle causes, and carry out risk assessment and early warning by current operation risk with based on contingency set system risk two kinds of situations of the current method of operation of equipment Risk,
Operation reserve assistant analysis unit: for analyzing the result assessed system risk with prewarning unit according to straight-flow system operation risk, formulate operation reserve, described operation reserve comprises control measure and solution;
The safe early warning evaluating system of a kind of HVDC (High Voltage Direct Current) transmission system provided by the invention and method, can analyze the security of HVDC (High Voltage Direct Current) transmission system in real time, and assessment and analysis is carried out to the risk that obstacle or fault bring to system, make early warning in time and propose operation reserve, reducing system risk and reduce equipment loss.
Accompanying drawing explanation
Fig. 1 is the structural representation of the safe early warning evaluating system of a kind of HVDC (High Voltage Direct Current) transmission system of the present invention;
Fig. 2 is that in Fig. 1, service data and equipment information collection cellular construction are illustrated;
Fig. 3 is that in Fig. 1, straight-flow system operation risk analyzes the structural representation with prewarning unit;
Fig. 4 be in Fig. 1 operation reserve assistant analysis unit based on the processing flow chart of the current operation risk of system;
Fig. 5 be in Fig. 1 operation reserve assistant analysis unit based on the processing flow chart of the contingency set system risk of the current method of operation of equipment Risk;
Fig. 6 is a kind of preferred embodiment structural representation of the safe early warning evaluating system of a kind of HVDC (High Voltage Direct Current) transmission system of the present invention.
Embodiment
Become increasingly complex for prior art mesohigh DC transmission system, equipment gets more and more, need to monitor in real time and risk assessment it, to reduce risk and to reduce the loss, the technical scheme that the embodiment of the present invention provides, obtains the data of the operation information of current HVDC (High Voltage Direct Current) transmission system, the status information of each equipment and the application system of run unit by the real-time application system from HVDC (High Voltage Direct Current) transmission system and run unit.The control and scheduling co-design logic of the AC system of operating HVDC (High Voltage Direct Current) transmission system and association thereof is called in the present system, reconstruct, transfer, the data that load operating obtains, and based on the HVDC (High Voltage Direct Current) transmission system of reconstruct and the steering logic of AC system of association thereof and relay protective scheme, expert's vulnerability database carries out computational analysis, divide current operating situation and forecast accident situation, calculate the various faults that maybe may occur of the current existence of whole HVDC (High Voltage Direct Current) transmission system, the system risk that obstacle causes, and carry out risk assessment and early warning by current operation risk with based on contingency set system risk two kinds of situations of the current method of operation of equipment Risk, and according to the result of risk assessment and early warning, control measure and solution are taked to HVDC (High Voltage Direct Current) transmission system, and the work of system is constantly examined and upgraded, analyze with the real-time security to HVDC (High Voltage Direct Current) transmission system, and assessment and analysis is carried out to the risk that obstacle or fault bring to system, make early warning in time and propose operation reserve, reducing system risk and reduce equipment loss.
Below in conjunction with each accompanying drawing, the main of embodiment of the present invention technical scheme is realized principle, embodiment and set forth in detail the beneficial effect that should be able to reach.
With reference to the structured flowchart of the safe early warning evaluating system of a kind of HVDC (High Voltage Direct Current) transmission system shown in Fig. 1.Comprise the service data that connects successively and equipment information collection unit, straight-flow system operation risk are analyzed and prewarning unit, operation reserve assistant analysis unit, software support unit.
For the system that Modern high-pressure transmission system is complicated like this, comprise the AC system of HVDC (High Voltage Direct Current) transmission line, DC converter station and association thereof, produce numerous system and the equipment such as MIX system, SCADA system, effective real-time data acquisition and process to be implemented to it, the process be unable to do without based on computer technology calculates, native system arranges software support unit, for for service data and equipment information collection unit, the analysis of straight-flow system operation risk and prewarning unit, operation reserve assistant analysis unit, software support is provided.And for realizing following function:
(1) current conversion station of HVDC (High Voltage Direct Current) transmission system both sides and HVDC (High Voltage Direct Current) transmission line are set up HVDC (High Voltage Direct Current) transmission system model, main signal in station in venture analysis module and alarm trip(ping) circuit are carried out combing, is intuitively shown by the mode of HVDC (High Voltage Direct Current) transmission system model;
(2) through combing system cloud gray model risk, the alarm level of event is defined respectively from the consequence that may cause;
(3) feasible executive measure is proposed to the analysis result running assistant analysis policy unit, and transfer site disposal prediction scheme and similar incidents over the years confession operations staff analysis;
(4) provide flow process to instruct to incident processing procedure, carry out corresponding workflow by display alarm region between HVDC (High Voltage Direct Current) transmission system model and prompting operations staff.
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 is provided by software support unit, with HVDC (High Voltage Direct Current) transmission system, comprise control system, protection system, measuring system, fault recording system, and other application system of run unit carries out interface, obtain the operation information of current HVDC (High Voltage Direct Current) transmission system, the status information of equipment, produce MIX system, SCADA system, patrol and examine that information and technical supervision system etc. obtain about taking system as entirety, comprise the machine account of various kinds of equipment in HVDC (High Voltage Direct Current) transmission system, historic defects, Back ground Information, information in operation, historical failure and accident, prerun data, the current method of operation, repair apparatus and following turnaround plan, prediction load curve and other information relevant to operation, as weather information on the way, for data basis is established in security of system status early warning and risk assessment.
The legal correction verification module of data carries out synchronously the data that data acquisition module obtains, carry out legitimacy verification to data after the process such as classification, to make each data should in its legal interval.And the data by legal verification are sent to database store, form server, carry out security of system status early warning for the analysis of straight-flow system operation risk and prewarning unit and risk assessment provides data supporting.
Consult Fig. 3, the analysis of straight-flow system operation risk and prewarning unit comprise steering logic and relay protective scheme module, expert's vulnerability database, current operation risk assessment and warning module, contingency set module based on the current method of operation of equipment Risk.
The database of steering logic and relay protective scheme model calling service data and equipment information collection unit, the control and scheduling co-design logic of the AC system of operating HVDC (High Voltage Direct Current) transmission system and association thereof is carried out calling, reconstructing in the present system, transfer, load operating data and equipment information collection cell data database data carry out computing, described data comprise operation information, service data, load data, service arrangement data, fault SER, facility information, state estimation, probability of malfunction, fault level; And the prediction failure collection obtained based on equipment Risk.Facility information is loaded on non-ionizing energy loss logic module, carries out computing.
Expert's vulnerability database: connection control logical and relay protective scheme model calling; expert's vulnerability database is formed according to the control system of obstacle or accident, relay protection and the logic of aut.eq. and all kinds of non-ionizing energy loss definite values of definite value and equipment may be caused; result after the computing of Loading Control logical and relay protective scheme module; carry out calculating with relay protective scheme, definite value to contrast, for for current operation risk assessment and warning module, carry out risk assessment and early warning based on the contingency set module of the current method of operation of equipment Risk.
Current operation risk assessment is connected expert's vulnerability database with warning module; for the data based on expert's vulnerability database; and the result after the steering logic loaded in expert database and the computing of relay protective scheme module; carry out calculating comparing result with relay protective scheme, definite value, and carry out risk assessment and early warning based on current operation risk.System comprehensively calculates under current operating situation and in forecast accident situation, in the system loading loss risk that the faults such as the locking of whole HVDC (High Voltage Direct Current) 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 may cause thereof, current conversion station, AC system superpotential overload risk, equipment loss risk with personal injury risk etc., and carry out risk assessment and early warning based on current system operation risk with based on the contingency set system risk of the current method of operation of equipment Risk.Above-mentioned steering logic and relay protective scheme comprise direct current station control logic, level control/level relay protective scheme, organize control/organize relay protective scheme, Exchange Station controls/harmonics logic, non-ionizing energy loss logic.
Above-mentionedly carry out risk assessment and early warning based on current operation risk, concrete finger carries out automatic monitoring assessment to current HVDC (High Voltage Direct Current) transmission system, carries out from bottom to top assessing and early warning respectively by the assessment of station equipment level, current conversion station operation risk assessment and early warning, whole HVDC (High Voltage Direct Current) transmission system three grades:
Station equipment level is assessed: be first to each main equipment in HVDC (High Voltage Direct Current) transmission system; comprise primary equipment, secondary device as converter power transformer, converter valve, Control protection equipment etc.; and important utility appliance such as valve cooling system, low-voltage direct-current system etc. carry out modeling; and give it and normally run closely bound up operation parameters and state parameter by service data and the collection of equipment information collection unit with equipment; the operation parameters current according to each equipment and state parameter, set up this equipment current operation risk index defect tree-model.Operation parameters includes but not limited to equipment voltage, electric current, frequency, harmonic content, valve Trigger Angle etc., and contrast with the actual consistent also default warning value of associated external site environment parameter as temperature, weather etc., calculate according to each relevant code the nargin that it arrives warning value; Equipment state associates the history record of production of this equipment on the one hand, but be not limited to as Unit account of plant, prerun regular inspection record, historic defects, history patrol record, same category of device accident default data, the running status record that associate device is current on the other hand, as oil temperature, line temperature, oil level, tap gear and state, Trigger Angle, SF6 pressure, online oil chromatography, action frequency, online monitoring data and the defect etc. of patrolling and examining discovery.Facility information comprises converter power transformer oil temperature, line temperature, SF6 force value, Buchholz relay etc.
Set up this equipment current operation risk index defect tree-model, concrete grammar is as follows: the state showing whole equipment with the set of component state single in equipment, analyze part, unit failure to the impact of equipment failure, comprising human factor and environmental baseline, definition component defects index, by the fault data to this element in former years, and the fault data of provided as one homogeneous element in other HVDC (High Voltage Direct Current) transmission system, judge the probability of its fault, the order of severity of straight-flow system accident may be caused according to this element status in systems in which and fault, judge the risk that its impact runs, i.e. risk=probability of malfunction × fault seriousness, be divided into four ranks, devoid of risk, average risk, material risk, urgent risk, wherein, devoid of risk represents that this element is without any defect pipelines, average risk represents that this element exists the phenomenon be not inconsistent with normal operating condition, but not processing within half a year also can not the stable operation of impact to voltage DC transmission system, material risk represents that this element exists the person, electrical network and equipment have serious threat, still can adhere to running, process the defect likely caused the accident not in time, urgent risk represents that this element exists and occurs directly threaten safe operation and need process immediately, device damage may be caused at any time, personal injury, large-area power-cuts, the defect of the accidents such as fire, the element that operation risk is the highest will represent the operation risk grade of this equipment, participate in current conversion station operation risk assessment, and other component defects of equipment also gather by fault tree, inquires about.
Current conversion station operation risk assessment and early warning: gather the primary equipment of entirely standing, the alternating-current field equipment that secondary device and important utility appliance include but not limited to DC fields equipment and be connected, and corresponding control, the equipment operation risk assessment of protection screen cabinet etc., according to the method for operation and the maintenance mode of current high-voltage direct current and AC system, steering logic and the relay protective scheme of HVDC (High Voltage Direct Current) transmission system is reconstructed in software architecture, by the Defect Correlation information assignment of equipment in control and relay protective scheme, action consequence in the control and scheduling co-design logic that analytical equipment defect may cause, early warning is given for there being the equipment deficiency of the consequence affecting the normal operation trend of current conversion station, meanwhile, gather the current operation risk analysis being present in other defective element in equipment in station, and early warning is carried out to its consequence that may cause,
System-level assessment: the current operation information and the status information of equipment that gather each current conversion station and HVDC (High Voltage Direct Current) transmission line in HVDC (High Voltage Direct Current) transmission system; assignment, in the control and scheduling co-design logic of reconstruct, gives early warning to the equipment deficiency of the normal operation trend consequence of the whole HVDC (High Voltage Direct Current) transmission system of impact.
With reference to shown in Fig. 4, carrying out in risk assessment and early warning situation based on the current operation risk of system, the control measure that operation reserve assistant analysis unit is formulated and solution specifically comprise:
Treatment measures: the possible loop of combing fault after fault occurs, the disposal route showing the signal of fault, alarm loop by software interface and should take in current conversion station model;
Service arrangement: the inspection should carried out after accident occurs, comprises primary equipment state, perfect the inspection of valve group running status, Control protection equipment state, checks transient fault recorder situation, assistant analysis culprit;
Accident prediction: the state of assistant analysis accident, by visual prediction scheme, instructs operations staff to check corresponding master status according to the field software of prediction scheme flow process and faulty equipment, drawing, photo.
The contingency set model calling expert vulnerability database of the current method of operation based on equipment Risk in Fig. 3, according to the prediction failure collection based on equipment Risk based on the steering logic of the AC system of HVDC (High Voltage Direct Current) transmission system and association thereof and relay protective scheme, expert's vulnerability database etc. carries out Treatment Analysis, comprise station level control and scheduling co-design logic, pole level control and scheduling co-design logic, group level control and scheduling co-design logic, alternating-current field control and scheduling co-design logic, system comprehensively calculates under current operating situation and in forecast accident situation, the locking of whole HVDC (High Voltage Direct Current) transmission system single valve group, one pole locking or bipolar locking, limited load, brownout operation, the system loading loss risk that the faults such as alternating-current field line tripping or obstacle cause and the social risk that may cause thereof, AC system superpotential overload risk in current conversion station, equipment loss risk is with personal injury risk etc., and carry out risk assessment and early warning based on the contingency set system risk of the current method of operation of equipment Risk.
Contingency set system risk based on the current method of operation of equipment Risk carries out risk assessment and early warning, specifically comprises:
According to the current method of operation, by current operating primary equipment, secondary device and important utility appliance, and system operational parameters fault, be set to the single-element that possibility influential system normally runs respectively, list forecast accident in and concentrate.
Take individual equipment as element, after one of them element of imagination occurs that urgent defect is out of service successively, the consequence possible according to the control and scheduling co-design logic analysis of reconstruct, classification is carried out to the equipment that wherein possibility impact to voltage DC transmission system is run, be respectively redundance unit, visual plant, key equipment; Wherein, after redundance unit represents that this equipment is out of service, the not normal operation of impact to voltage DC transmission system; Visual plant is defined as this equipment may affect some function of straight-flow system, but it can not be caused to trip; Key equipment is defined as this equipment once out of service, will cause single valve group, the one pole even serious consequence of bipolar trip.
With reference to Fig. 5, contingency set module based on the current method of operation of equipment Risk is carried out in risk assessment and early warning, the control measure that operation reserve assistant analysis unit is formulated and solution specifically comprise: the operation risk identification based on equipment Risk anticipation: for the existing mode of connection of HVDC (High Voltage Direct Current) transmission system, set up HVDC (High Voltage Direct Current) transmission system equipment imagination fault set, likelihood of failure analysis and fault effects analysis are carried out for the fault in imaginary fault set, draws the equipment Risk value of this fault;
According to imaginary fault, the HVDC (High Voltage Direct Current) transmission system after equipment failure is simulated, analyze HVDC (High Voltage Direct Current) transmission system running status;
Undertaken analyzing the failure effect of imaginary equipment by venture analysis;
Carry out identification and pre-control by the value-at-risk of this equipment, propose to run aid decision making;
Proposition may cause the cluster tool of one pole, bipolar trip risk: repeat all devices value-at-risk in above-mentioned measures analysis HVDC (High Voltage Direct Current) transmission system, sets up HVDC (High Voltage Direct Current) transmission system equipment Risk matrix;
For risk equipment, Risk Pre-control measure is proposed: large excessive risk value equipment is obviously become to risk and proposes Pre-control measures, comprise schedule ahead turnaround plan, change the method for operation, reduce conveying load, shorten the tour cycle, adopt infrared measurement of temperature, carry out equipment breakdown rehearsal, transcription equipment operational factor.
A preferred embodiment of the present invention, as shown in Figure 6, also comprise examination and improve unit, described examination with improve that unit is connected with prewarning unit, operation reserve assistant analysis unit with equipment information collection unit, the analysis of straight-flow system operation risk with service data, software support unit connects respectively;
Examination and improvement updating block: for upgrading each module of native system, change and examine.
Examination and improvement updating block are to each unit of native system and module upgrades, change and ruuning situation is examined, to carry out security risk assessment and early warning to HVDC (High Voltage Direct Current) transmission system timely and effectively.
HVDC (High Voltage Direct Current) transmission system safe early warning provided by the invention and evaluating system, be applicable to monitor in real time and Forewarn evaluation HVDC (High Voltage Direct Current) transmission system, is also applicable to monitor in real time and Forewarn evaluation UHV (ultra-high voltage), extra-high voltage DC transmission system simultaneously.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. HVDC (High Voltage Direct Current) transmission system safe early warning and an evaluating system, is characterized in that: comprise the service data that connects successively and equipment information collection unit, straight-flow system operation risk are analyzed and prewarning unit, operation reserve assistant analysis unit, software support unit;
Software support unit: for providing software support for service data and equipment information collection unit, the analysis of straight-flow system operation risk and prewarning unit, operation reserve assistant analysis unit;
Service data and equipment information collection unit: for all kinds of standard interfaces provided by software support unit, interface is carried out with the application system of DC transmission system and run unit, obtain the data of the operation information of current DC transmission system, the status information of each equipment and the application system of run unit, and pre-service is carried out to data, formation database, carries out security of system status early warning for the analysis of straight-flow system operation risk and prewarning unit and risk assessment provides data supporting;
Straight-flow system operation risk is analyzed and prewarning unit: for operating DC transmission system and the steering logic of AC system associated thereof and relay protective scheme being called in the present system, reconstruct, transfer, load operating data and equipment information collection cell data database data, and based on the HVDC (High Voltage Direct Current) transmission system of reconstruct and the steering logic of AC system of association thereof and relay protective scheme, expert's vulnerability database carries out computational analysis, divide current operating situation and forecast accident situation, calculate the various faults that maybe may occur of the current existence of whole HVDC (High Voltage Direct Current) 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 contingency set system risk two kinds of situations of the current method of operation of equipment Risk,
Operation reserve assistant analysis unit: for analyzing the result assessed system risk with prewarning unit according to straight-flow system operation risk, formulate operation reserve, described operation reserve comprises control measure and solution;
The analysis of described straight-flow system operation risk and prewarning unit comprise steering logic and relay protective scheme module, expert's vulnerability database, current operation risk assessment and warning module, contingency set module based on the current method of operation of equipment Risk;
Described steering logic and relay protective scheme model calling service data and equipment information collection unit, control and scheduling co-design logic for the AC system by operating HVDC (High Voltage Direct Current) transmission system and association thereof carries out calling, reconstructing in the present system, transfers, load operating data and equipment information collection cell data database data carry out computing; Facility information is loaded on non-ionizing energy loss logic module, carries out computing;
Expert's vulnerability database: connection control logical and relay protective scheme module, expert's vulnerability database is formed according to the control system of obstacle or accident, relay protection and the logic of aut.eq. and all kinds of non-ionizing energy loss definite values of definite value and equipment may be caused, result after the computing of Loading Control logical and relay protective scheme module, carry out calculating with relay protective scheme, definite value to contrast, for for current operation risk assessment and warning module, carry out risk assessment and early warning based on the contingency set module of the current method of operation of equipment Risk;
Described current operation risk assessment is connected described expert's vulnerability database with warning module, for the data based on expert's vulnerability database, and the result after the steering logic loaded in expert database and the computing of relay protective scheme module, carry out calculating comparing result with relay protective scheme, definite value, and carry out risk assessment and early warning based on current operation risk;
Expert's vulnerability database described in the contingency set model calling of the described current method of operation based on equipment Risk, carry out the data of steering logic and relay protective scheme module and expert's vulnerability database according to the prediction failure collection based on equipment Risk, and carry out risk assessment and early warning based on the contingency set system risk of the current method of operation of equipment Risk;
Described current operation risk assessment and warning module carry out risk assessment and early warning based on current operation risk, concrete finger carries out automatic monitoring assessment to current HVDC (High Voltage Direct Current) transmission system, carries out from bottom to top assessing and early warning respectively by the assessment of station equipment level, current conversion station operation risk assessment and early warning, whole HVDC (High Voltage Direct Current) transmission system three grades:
Station equipment level is assessed: be first carry out modeling to each primary equipment, secondary device and important utility appliance in HVDC (High Voltage Direct Current) transmission system, and give it and normally run closely bound up operation parameters and state parameter by service data and the collection of equipment information collection unit with equipment, the operation parameters current according to each equipment and state parameter, set up this equipment current operation risk index defect tree-model;
Current conversion station operation risk assessment and early warning: gather primary equipment, secondary device and the important utility appliance operation risk assessment of entirely standing, according to the method for operation and the maintenance mode of current high-voltage direct current and AC system, steering logic and the relay protective scheme of HVDC (High Voltage Direct Current) transmission system is reconstructed in software architecture, by the Defect Correlation information assignment of equipment in control and relay protective scheme, action consequence in the control and scheduling co-design logic that analytical equipment defect may cause, gives early warning for there being the equipment deficiency of the consequence affecting the normal operation trend of current conversion station; Meanwhile, gather the current operation risk analysis being present in other defective element in equipment in station, and early warning is carried out to its consequence that may cause;
System-level assessment: the current operation information and the status information of equipment that gather each current conversion station and HVDC (High Voltage Direct Current) transmission line in HVDC (High Voltage Direct Current) transmission system; assignment, in the control and scheduling co-design logic of reconstruct, gives early warning to the equipment deficiency of the normal operation trend consequence of the whole HVDC (High Voltage Direct Current) transmission system of impact.
2. HVDC (High Voltage Direct Current) transmission system safe early warning according to claim 1 and evaluating system, it is characterized in that: described operation parameters comprises equipment voltage, electric current, frequency, harmonic content, valve Trigger Angle etc., and also associated external site environment parameter consistent with following reality, specifically comprise temperature, the default warning value of weather contrasts, calculate according to each relevant code the nargin that it arrives warning value; Facility information comprises converter power transformer oil temperature, line temperature, SF6 force value, Buchholz relay etc.;
Describedly set up this equipment current operation risk index defect tree-model, specifically comprise: with the set of component state single in equipment to show the state of whole equipment, analyze part, unit failure to the impact of equipment failure, comprising human factor and environmental baseline, definition component defects index, by the fault data to this element in former years, and the fault data of provided as one homogeneous element in other HVDC (High Voltage Direct Current) transmission system, judge the probability of its fault, the order of severity of straight-flow system accident may be caused according to this element status in systems in which and fault, judge the risk that its impact runs, i.e. risk=probability of malfunction × fault seriousness, be divided into four ranks, devoid of risk, average risk, material risk, urgent risk, wherein, devoid of risk represents that this element is without any defect pipelines, average risk represents that this element exists the phenomenon be not inconsistent with normal operating condition, but not processing within half a year also can not the stable operation of impact to voltage DC transmission system, material risk represents that this element exists the person, electrical network and equipment have serious threat, still can adhere to running, process the defect likely caused the accident not in time, urgent risk represents that this element exists and occurs directly threaten safe operation and need process immediately, device damage may be caused at any time, personal injury, large-area power-cuts, the defect of the accidents such as fire, the element that operation risk is the highest will represent the operation risk grade of this equipment, participate in current conversion station operation risk assessment, and other component defects of equipment also gather by fault tree, inquires about.
3. HVDC (High Voltage Direct Current) transmission system safe early warning according to claim 2 and evaluating system, is peculiarly being: the control measure that described operation reserve assistant analysis unit is formulated and solution specifically comprise:
Treatment measures: the possible loop of combing fault after fault occurs, the disposal route showing the signal of fault, alarm loop by software interface and should take in current conversion station model;
Check and arrange: the inspection should carried out after accident occurs, comprises primary equipment state, perfect the inspection of valve group running status, Control protection equipment state, check transient fault recorder situation, assistant analysis culprit;
Accident prediction: the state of assistant analysis accident, by visual accident prediction, instructs operations staff to check corresponding master status according to the field software of prediction scheme flow process and faulty equipment, drawing, photo.
4. HVDC (High Voltage Direct Current) transmission system safe early warning according to claim 1 and evaluating system, it is characterized in that: the contingency set module of the described current method of operation based on equipment Risk carries out risk assessment and early warning based on the contingency set system risk of the current method of operation of equipment Risk, specifically comprises:
According to the current method of operation, by current operating primary equipment, secondary device and important utility appliance, and system operational parameters fault, be set to the single-element that possibility influential system normally runs respectively, list forecast accident in and concentrate;
Take individual equipment as element, after one of them element of imagination occurs that urgent defect is out of service successively, the consequence possible according to the control and scheduling co-design logic analysis of reconstruct, classification is carried out to the equipment that wherein possibility impact to voltage DC transmission system is run, be respectively redundance unit, visual plant, key equipment; Wherein, after redundance unit represents that this equipment is out of service, the not normal operation of impact to voltage DC transmission system; Visual plant is defined as this equipment may affect some function of straight-flow system, but it can not be caused to trip; Key equipment is defined as this equipment once out of service, will cause single valve group, the one pole even serious consequence of bipolar trip.
5. HVDC (High Voltage Direct Current) transmission system safe early warning according to claim 4 and evaluating system, is characterized in that: the control measure that described operation reserve assistant analysis unit is formulated and solution specifically comprise:
Operation risk identification based on equipment Risk anticipation: for the existing mode of connection of HVDC (High Voltage Direct Current) transmission system, set up HVDC (High Voltage Direct Current) transmission system equipment imagination fault set, likelihood of failure analysis and fault effects analysis are carried out for the fault in imaginary fault set, draws the equipment Risk value of this fault;
According to imaginary fault, the HVDC (High Voltage Direct Current) transmission system after equipment failure is simulated, analyze HVDC (High Voltage Direct Current) transmission system running status;
Undertaken analyzing the failure effect of imaginary equipment by venture analysis;
Carry out identification and pre-control by the value-at-risk of this equipment, propose to run aid decision making;
Proposition may cause the cluster tool of one pole, bipolar trip risk: repeat all devices value-at-risk in above-mentioned measures analysis HVDC (High Voltage Direct Current) transmission system, sets up HVDC (High Voltage Direct Current) transmission system equipment Risk matrix;
For risk equipment, Risk Pre-control measure is proposed: large excessive risk value equipment is obviously become to risk and proposes Pre-control measures, comprise schedule ahead turnaround plan, change the method for operation, reduce conveying load, shorten the tour cycle, adopt infrared measurement of temperature, carry out equipment breakdown rehearsal, transcription equipment operational factor.
6. HVDC (High Voltage Direct Current) transmission system safe early warning according to claim 1 and evaluating system, is characterized in that: described obstacle, fault specifically comprise the locking of whole HVDC (High Voltage Direct Current) transmission system single valve group, one pole locking or bipolar locking, limited load, brownout operation, AC system line tripping; Described system risk specifically comprises AC system superpotential overload risk, equipment loss risk and personal injury risk in system loading loss risk and the social risk that may cause thereof, current conversion station; Described steering logic and relay protective scheme module specifically comprise direct current station control logic, level control/level relay protective scheme, organize control/organize relay protective scheme, Exchange Station controls/harmonics logic, non-ionizing energy loss logic.
7. HVDC (High Voltage Direct Current) transmission system safe early warning according to claim 1 and evaluating system, is characterized in that: described service data and equipment information collection unit comprise the data acquisition module, the legal inspection module of data, database and the server that are connected successively;
Data acquisition module: for all kinds of standard interfaces provided by 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 the operation information of current HVDC (High Voltage Direct Current) transmission system, the status information of each equipment and the application system of run unit;
The legal correction verification module of data: the data for obtaining data acquisition module process and carry out legitimacy verification, describedly processes data, comprises carrying out synchronously data, classifying; The verification of described legitimacy specifically instigates each data should in its legal interval;
Database: for storing the data by the legal correction verification module verification of data;
Server: for the data in database are supplied to the analysis of straight-flow system operation risk and prewarning unit, carries out security of system status early warning for the analysis of straight-flow system operation risk and prewarning unit and risk assessment provides data supporting.
8. according to the arbitrary described HVDC (High Voltage Direct Current) transmission system safe early warning of claim 1 to 7 and evaluating system, it is characterized in that: also comprise examination and improve unit, described examination with improve that unit is connected with prewarning unit, operation reserve assistant analysis unit with equipment information collection unit, the analysis of straight-flow system operation risk with service data, software support unit connects respectively; Examination and improvement updating block: for upgrading each module of native system, change and examine.
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