CN103986237B - A kind of prevention and control of power distribution network and fault processing system - Google Patents
A kind of prevention and control of power distribution network and fault processing system Download PDFInfo
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Abstract
The present invention relates to a kind of prevention and control of power distribution network and fault handling method and system thereof, this system comprises: unified parametric controller and an information acquisition unit, and it also comprises a prevention and control unit; One end of described unified parametric controller is connected with described information acquisition unit, and the other end is connected with described prevention and control unit; Described prevention and control unit is for predicting the irregular operating state of equipment in power distribution network described in following short-term; Described prevention and control unit comprises one second index calculate module, described second index calculate module is used for according to facility information and network topological information in described power distribution network, preset index, store described topology information, for a fault processing unit provides Data support.The prevention and control of described power distribution network and fault handling method and system thereof have in practical, short time not easily out-of-limit, effectively save the time of prevention and control process, have the advantage of saving the energy, reducing fault rate.
Description
Technical field
The present invention relates to a kind of control of power distribution network and the method for process and system thereof, particularly relate to a kind of prevention and control and fault processing system of power distribution network.
Background technology
Disclose the control of multiple power distribution network and the method for process in prior art, it mostly is and utilizes power distribution automation main station system to carry out remote monitoring, operation, and practicality is not good enough, and for the treatment measures that some special circumstances do not have some complete.
Concentrate the self-healing control method of distribution network with distributed coordination, the process of signal and the generation of control strategy have adaptivity, automatically control procedure is completed under prosthetic intervention condition, coordinate protective relaying device and protecting control device, switch and intelligent switch, the action behavior of automatic safety device, comprise distribution self-healing control and concentrated self-healing control two step, by gathering voltage, electric current, the data such as on off state, judge the current residing running status of power distribution network, and use intelligent method to carry out decision-making, to switch, protecting control device, automatic safety devices etc. carry out cooperation control, realize power distribution network all the time to more health status transfer, improve power distribution network Supply Security, reliability, quality and economy, strengthen the target of emergency capability.
A kind of self-healing control method of distribution network; it is characterized in that adopting the self-healing control method of distribution network concentrated with distributed coordination; the process of signal and the generation of control strategy have adaptivity; automatically control procedure is completed under prosthetic intervention condition; coordinate the action behavior of protective relaying device and protecting control device, switch and intelligent switch, automatic safety device, comprise distribute self-healing control and concentrated self-healing control two step.
Distribution self-healing control step: the voltage of power distribution network, current transformation are light current or light signal by voltage current transformer respectively, compare with protection seting value after voltage after protecting control device and protective relaying device receive conversion, current signal, when exceeding action launching value, trigger relay is by switch separating brake, and protecting control device is according to voltage and current signal determination fault section simultaneously! single-phase earthing and insulation descending device, and trigger relay disconnects the switch be connected with fault section, then search for and close a floodgate one and to be connected with non-faulting section and the other end has the switch of normal voltage signal, compare with operating valve value after voltage and current signal after the backup auto-activating device of transformer station receives conversion and on off state, when meeting operation condition, trigger relay closes block switch, voltage and current signal single-phase earthing and insulation dropping signal after all conversion, the action situation of protecting control device and backup auto-activating device, the state of action front-rear switch sends master station computer with message mode to by RTU and power communication network,
Concentrate self-healing control step: after main website front end processor receives message, parsing reduction is carried out to signal, and carry out filtering process, after filter false information by signal transmission to main website server, send to RTU to perform corresponding control operation the main website server controls command signal received by power communication network simultaneously;
Self-healing control method of distribution network, it is characterized in that machine is cut in described generation, the method for cutting load scheme is frequency in the isolated island that receives of main website server by utilizing, voltage, current signal carry out power equilibrium calculation, the gross power that in isolated island, power supply can send sorts according to the importance of load when being less than total load, power will be greater than and the low load of importance is defined as power failure load, if generator output is much larger than total load, sort according to exerting oneself of generator, size of exerting oneself and the immediate generator of power difference are defined as stopping paying out unit; Isolated island internal power balanced basis progressively increases the load power in isolated island, calculate the critical voltage of isolated island under various power situation, current operating situation and critical voltage are compared, control closest to the capacitor at critical voltage place, generator and load when there is Voltage Instability trend, make, in isolated island, Voltage Instability phenomenon does not occur.
" a kind of power distribution network cable line local overheating Risk Identification ", publication number is CN201310188786.X, the present invention relates to power distribution network risk analysis and control technology field, is specifically related to a kind of power distribution network cable line local overheating Risk Identification.Namely the method obtains A, B, C three-phase voltage, the current information at the first and last end switch place in the former historical time section of power distribution network cable line current time, calculate cable line real-time impedance average within this time period, excavate the fluctuation pattern of cable line real-time impedance average within this time period, according to the incidence relation between the change of impedance basis for estimation and impedance and cable line temperature rise, carry out power distribution network cable line local overheating Risk Identification.The method effectively can realize power distribution network cable line local overheating Risk Identification, have practicality good, calculate simple, easy-operating advantage, the operation maintenance carrying out cable line for operation of power networks personnel and the self-healing control realizing cable line provide reference frame.
But often prior art precautionary measures and troubleshooting are all fairly simple, be all utilize power distribution automation main station system to carry out remote monitoring, operation mostly, and practicality is not good enough, and for the treatment measures that some special circumstances do not have some complete.When realizing power distribution network prevention and control, mostly just for current power distribution network real-time data collection and prediction data, not effectively in conjunction with the defect of each equipment itself, relevant history information and same category of device fault rate, the position of equipment in network topology is not considered yet, this easily causes when low pressure is out-of-limit in short-term, only rely on the evaluation of operational factor to cause preventative reconstruct, and can not each index pre-set, can not have current network topology information and can not time of effectively saving prevention and control process.
In view of above-mentioned defect, creator of the present invention obtains this creation finally through long research and practice.
Summary of the invention
The object of the present invention is to provide a kind of prevention and control and fault processing system of power distribution network, in order to overcome above-mentioned technological deficiency.
For achieving the above object, the invention provides a kind of prevention and control and fault processing system of power distribution network, it comprises a unified parametric controller, with an information acquisition unit, it also comprises: a prevention and control unit and a fault processing unit, and described unified parametric controller is connected with fault processing unit with described information acquisition unit, prevention and control unit respectively; Described information acquisition unit is used for information gathering, statistics and human-computer exchange and controls; Described prevention and control unit for predicting the irregular operating state of equipment in following short-term power distribution network, and controls prediction abnormal state out; Described fault processing unit is used for carrying out fast processing to the fault of equipment in power distribution network; Described unified parametric controller is used for being responsible for the information gathering of whole distribution system, the statistics of various data, the coordination and control of each functional unit; Described prevention and control unit comprises one first index calculate module, described first index calculate module is used for according to facility information and network topological information in described power distribution network, preset index, store described topology information, for a fault processing unit provides Data support.
Preferably, described prevention and control unit also comprises a prevention reconstructed module, one first distributed power source drops into module and one first cutting load module;
Described prevention reconstructed module is used for when predicting following risky, by changing topology, eliminating or reducing risk;
When described first distributed power source input module does not meet the power supply of whole load for described prevention reconstructed module, drop into the distributed power source of respective volume at the correct position of described power distribution network, in order to ensure more supply of electric power;
Described first cutting load module be used for when the described first index calculate module in described prevention and control unit, described prevention reconstructed module and described first distributed power source input module all can not ensure all loads power or described power distribution network safe and reliable operation time, by excising the load of load level, in order to ensure system safety.
Preferably, described fault processing unit comprise a dead electricity load turn fast for module, one second distributed power source drop into module, a failure reconfiguration module and one second cutting load module;
Described dead electricity load turns for the topology information of module for analyzing and processing current network in advance fast;
When described second distributed power source input module does not meet sufficient power for turning confession module fast at described dead electricity load, analyze the network information and information on load, more electric power is provided;
Described failure reconfiguration module is used for failure reconfiguration and optimizes topology;
Described second cutting load module is used for the load by excising load level, in order to guarantee system safety stable operation.
Preferably,
Described information acquisition unit comprises a network topological information acquisition module, a real-time traffic information acquisition module, a directive/guide library information input module and a load prediction MIM message input module;
Described network topological information acquisition module is used for Information Monitoring;
Described real-time traffic information acquisition module is used for the diverse location information of equipment in described network topology in power distribution network described in uninterrupted sampling;
Described directive/guide library information input module is used for the information collected to be entered in described information acquisition unit in time;
Described load prediction MIM message input module for judge negative charge amount in described equipment number and export a result detected.
Preferably, described unified parametric controller comprises a data acquisition module, one second index calculate module, a state monitoring module and a control module coordination and control module;
The information that described data acquisition module gathers for collecting, adding up described information acquisition unit;
Described second index calculate module is used for the information result collected according to described data acquisition module, obtains the reliability index of equipment in described power distribution network, and calculates importance index;
Whether described state monitoring module breaks down for detecting equipment in described power distribution network;
Described control module coordination and control module for controlling the coordination and control of all modules in the prevention and control of described power distribution network and fault processing system, in order to guarantee in described power distribution network the normal and smooth operation of equipment.
The present invention also provides a kind of prevention and control and fault handling method of power distribution network,
The method comprises the following steps:
Step S1, collects facility information in network topological information in described power distribution network in equipment and described power distribution network, obtains reliability index and the importance index of equipment in described power distribution network;
Step S2, according to reliability index and the importance index of equipment in described power distribution network, calculates the preventative index of equipment in described power distribution network;
Step S3, according to the preventative index of equipment in described power distribution network, monitors the current network state of power distribution network in equipment in described power distribution network and following short term state;
Step S4, when equipment in the described power distribution network monitored in described step S3 breaks down process, then carries out troubleshooting;
Step S5, when equipment fault-free in the described power distribution network monitored in described step S3, then judge future in a short time in described power distribution network equipment whether there is the out-of-limit situation of operational factor, if having, start described preventive control unit, if without; would return described step S3.
Preferably, described step S1 comprises:
Collect facility information in network topological information and described power distribution network, and information is processed, obtain reliability index and the importance index of equipment in described power distribution network, the reliability index of described equipment is W, the importance index of equipment is g in described power distribution network; In described power distribution network, the reliability index W computing formula of equipment is:
w＝1/(1+a+m*b+n*c)
Wherein, m is the weight coefficient of b, and n is the weight coefficient of c
M, n are respectively 0.2,0.1
In described power distribution network, described equipment is divided into three important level and verifies according to network topology situation by the basis of the importance index g of equipment.
Described step S2 comprises:
According to described reliability index and described importance index, set the load factor maximum K1 of equipment in described power distribution network, and consider that actual loading rate K calculates the slight out-of-limit maximum time T1 of tolerance;
The computing formula of described K1 is:
P
overthe highest out-of-limit ratio
W is reliability index
G is importance index
The computing formula of described T1 is:
A is constant, generally gets 30min
A is value corresponding to described equipment deficiency grade
K is the out-of-limit load factor of future time instance
K1 is load factor maximum.
Preferably, described step S4 comprises:
Step S41, the switch opened with network interruption is defined as basic ring, element branch road in the loop searched being defined as basic ring forms basic ring matrix, the corresponding loop of a line, and each provisional capital has an interconnection switch corresponding with it, carry out Fault Isolation, and whether network can safe and stable operation after the closed interconnection switch of checking, if can, terminate troubleshooting, after pending fault is repaired, return step S3, if can not, enter second unit and process;
Step S42, after first unit is by closed interconnection, when can not meet sufficient supply of electric power, analyzes the network information and information on load, at the suitable regional inputs distributed power source that just restores electricity, provides more electric power;
Step S43, drop into distributed power source, ensure sufficient supply of electric power, use harmony algorithm, select which interconnection switch closed and which branch road of disjunction, after the optimizing of harmony algorithm terminates, judge whether there is reconfiguration scheme in harmony data base, the voltage after making reconstruct in electrical network meets normal restraint requirement;
Step S44, carries out hierarchical operations branch road from power supply point, obtains all the other each layers successively; Travel through by layer, search certain branch road in certain one deck when having a situation of overload, and by power s
overwith the size of cutting load amount, judge out-of-limit situation.
Preferably, described step S5 comprises:
Step S51, the switch opened with network interruption is defined as basic ring, element branch road in the loop searched being defined as basic ring forms basic ring matrix, the corresponding loop of a line, and each provisional capital has an interconnection switch corresponding with it, carry out Fault Isolation, and whether network can safe and stable operation after the closed interconnection switch of checking, if can, terminate troubleshooting, after pending fault is repaired, return step 3, if can not, enter second unit and process;
Step S52, after first unit is by closed interconnection, when can not meet sufficient supply of electric power, analyzes the network information and information on load, at the suitable regional inputs distributed power source that just restores electricity, provides more electric power;
Step S53, uses intelligent algorithm, according to the actual conditions of network, by adjustment System supply path, thus eliminates overload, eliminates risk.
Beneficial effect of the present invention is compared with the prior art: the prevention and control of the power distribution network in the present invention and fault handling method and system thereof have advantage not easily out-of-limit in practical, short time, and by the form that the present invention is provided with a platform three modules, well achieve respective function; Described second index calculate module can according to described facility information and network topological information, each index pre-set, and there is the network topological information of current described power distribution network, carry out preventative reconstruct once needs and can provide Data support for subsequent processing units, effectively save the time of prevention and control process; The present invention can effectively reduce the probability that fault occurs, and the not science avoided because causing according to a small amount of index and unnecessary action; Dead electricity load can be recovered to greatest extent, accomplish as far as possible not dead electricity, dead electricity less of trying one's best, thus the waste of the energy be avoided in effective realization, arrives energy-conservation object; The safe and stable operation of the safeguards system that simultaneously can take appropriate measures when recovering, the present invention is reasonable in design, comprehensive to the consideration of problem, agrees with the needs of power distribution network actual motion.
Accompanying drawing explanation
Fig. 1 is the prevention and control of power distribution network of the present invention and the general frame schematic diagram of fault processing system;
Fig. 2 is the prevention and control of power distribution network of the present invention and the information acquisition unit block schematic illustration of fault processing system;
Fig. 3 is the prevention and control of power distribution network of the present invention and the unified parametric controller block schematic illustration of fault processing system;
Fig. 4 is the prevention and control of power distribution network of the present invention and the prevention and control unit framework schematic diagram of fault processing system;
Fig. 5 is the prevention and control of power distribution network of the present invention and the fault processing unit block schematic illustration of fault processing system;
Fig. 6 is the overall flow figure of the prevention and control of power distribution network of the present invention and the prevention and control of fault processing system and fault handling method.
Embodiment
Below in conjunction with accompanying drawing, to above-mentioned being described in more detail with other technical characteristic and advantage of the present invention.
Refer to shown in Fig. 1, it is the prevention and control of power distribution network of the present invention and the general frame schematic diagram of fault processing system, and it wraps unified parametric controller 2, the prevention and control unit 3 of an information acquisition unit 1, one and a fault processing unit 4;
Described information acquisition unit 1, for responsible information gathering, statistics, human-computer interactive control, namely according to the main primary equipment of power distribution network as: feeder line section and distribution transformer set up relevant information table, obtain reliability index and the importance index of equipment in described power distribution network;
Described unified parametric controller 2, for being responsible for the information gathering of whole distribution system, the statistics of various data, the coordination and control of each functional unit, by being provided with the form of a platform three modules, well achieves respective function;
Described prevention and control unit 3, as out-of-limit in: trend and the voltage out-of-limit of irregular operating state for the following equipment in a short time of real-time estimate etc., risk can be predicted in advance, when predicting the irregular operating state having future and exceed setting index, effective means can be taked to control, the described equipment performance avoiding equipment in described power distribution network to cause because of long-time irregular operating declines or device damage in described power distribution network, thus effectively can reduce the risk of device fails in described power distribution network, and have practical, advantage not easily out-of-limit in short time, and the not science avoided because causing according to a small amount of index and unnecessary action,
Described fault processing unit 4, for carrying out fast processing for fault, and can ensure that more load is powered and the power supply of important load as far as possible, can guarantee that system safety and the normal electricity consumption of user are not affected substantially;
One end of described unified parametric controller 2 is connected with described information acquisition unit 1, and the other end is connected with described fault processing unit 4 with described prevention and control unit 3 respectively, thus realizes the prevention and control of described power distribution network and the combination of troubleshooting.
Refer to shown in Fig. 2, it is the prevention and control of power distribution network of the present invention and the information acquisition unit block schematic illustration of fault processing system, and described information acquisition unit 1 comprises network topological information acquisition module 11, real-time traffic information acquisition module 12, directive/guide library information input module 13 and a load prediction MIM message input module 14; Described network topological information acquisition module 11, for gathering the diverse location information of described equipment in described network topology and carrying out information search to described equipment; Described real-time traffic information acquisition module 12, for the diverse location information of equipment described in uninterrupted sampling in described network topology; Described directive/guide library information input module 13, the information for described network topological information acquisition module 11 and described real-time traffic information acquisition module 12 being collected is entered in described information acquisition unit 1 in time; Described load prediction MIM message input module 14, for judge negative charge amount in described equipment number and export a result detected, last described information acquisition unit 1 by above-mentioned module acquires to information export a result, namely export the number of the information load amount of above-mentioned module acquires and demonstrate the height of significance level.
Refer to shown in Fig. 3, it is the prevention and control of power distribution network of the present invention and the unified parametric controller block schematic illustration of fault processing system, and described unified parametric controller 2 comprises data acquisition module 21,1 second index calculate module 22, state monitoring module 23 and a control module coordination and control module 24; Described data acquisition module 21 for collect, add up described information acquisition unit 1 and collect defect information, service life, same category of device rate of breakdown; Described second index calculate module 22, for the information result collected according to described data acquisition module 21, obtains the reliability index of this equipment, and the position residing in a network according to described equipment, calculate importance index; Whether described state monitoring module 23 breaks down for detecting described equipment; If break down, a fault processing unit to by signal transmission to go to solve fault; Described control module coordination and control module 24, for controlling the coordination and control of all modules in the prevention and control of described power distribution network and fault processing system, makes it normal and smooth operation.
Refer to shown in Fig. 4, it is the prevention and control of power distribution network of the present invention and the prevention and control unit framework schematic diagram of fault processing system, and described prevention and control unit 3 comprises one first index calculate module 31, and prevents reconstructed module 32,1 first distributed power source to drop into module 33 and one first cutting load module 34, described prevention and control unit 3 can as out-of-limit in: trend and the voltage out-of-limit of the irregular operating state of equipment etc. in the following described power distribution network in a short time of real-time estimate, risk can be predicted in advance, when predicting the irregular operating state having future and exceed setting index, effective means can be taked to control, the described equipment performance avoiding equipment in described power distribution network to cause because of long-time irregular operating declines or described device damage, thus effectively can reduce the risk of described device fails, effectively can reduce the probability of happening of the fault caused due to internal system reason, improve the operational reliability of equipment in described power distribution network and the fail safe of described system, described first index calculate module 31 can according to facility information and network topological information in described power distribution network, each index pre-set, and there is the network topological information of equipment in current described power distribution network, carry out preventative reconstruct once needs and can provide Data support for subsequent processing units, effectively save the time of prevention and control process, described prevention reconstructed module 32 when predicting following risky, by changing topology, be eliminated or reducing risk, after described prevention reconstructed module 32 obtains reconfiguration scheme, step switch is divided into several groups of forms combined having sequencing, each group comprises the switch that the closed switch of needs and need disjunction, described closed switch and described both the switches of disjunction that need interrelated, first the closed switch needing to close forms Electromagnetic coupling, first cyclization verification is carried out before described cyclization, disjunction needs the switch of disjunction again, such can guarantee optimizes topology when not power-off, follow-up all the like, combine and carry out action by aforesaid operations, described first distributed power source drops into module 33 when described prevention reconstructed module 32 can not meet the power reguirements of whole load, first the whole network power load distributing situation is analyzed, drop into the distributed power source of respective volume at the correct position of network, can more supply of electric power be ensured, described first cutting load module 34 above each measure all can not ensure all loads power or network security reliability service time, when preferential guarantee important load is powered and cutting load amount is minimum, by excising the load of load level, reach the object of system safety stable operation.
Refer to shown in Fig. 5, it is the prevention and control of power distribution network of the present invention and the fault processing unit block schematic illustration of fault processing system, and described fault processing unit 4 comprises a dead electricity load and turns for module 41,1 second distributed power source input module 42, failure reconfiguration module 43 and one second cutting load module 44 fast; Described fault processing unit 4 can carry out fast processing for fault, and can ensure that more load is powered and the power supply of important load as far as possible, can guarantee that system safety and the normal electricity consumption of user are not affected substantially; Described dead electricity load turns fast can the topology information of analyzing and processing current network in advance for module 41, when a failure occurs it, can quick position to fault zone and realize isolation, according to the information of anticipating, by the fast quick-recovery of the interconnection of closed respective regions to the power supply in dead electricity region, the speed of analysis decision is fast, can requirement of real time; For the region not having interconnection, drop into described second distributed power source and drop into module 42, make its isolated operation; Described second distributed power source drop into module 42 have described dead electricity load turn fast for module 41 by closed interconnection after, when can not meet sufficient supply of electric power, analyze the network information and information on load, drop into module 42 at suitable the second distributed power source described in regional inputs that just restores electricity, more electric power is provided; Described failure reconfiguration module 43 finds also there is the out-of-limit situation of operational factor when carrying out the first two module, then carry out failure reconfiguration and optimize topology; In the process optimizing topology, the scope of operational factor can than wider during normal operation, and after obtaining the result of decision, the described preventative reconstructed module in described prevention and control unit starts action, can ensure equally not change topology under powering-off state; Described second cutting load module 44 each measure above-mentioned all can not ensure all loads power or network security reliability service time, and network still exist operational factor serious out-of-limit time, carry out cutting load, when preferential guarantee important load is powered and cutting load amount is minimum, by excising the load of load level, reach the object of system safety stable operation; Cutting load method of operation under failure condition is consistent, and different places is that the allowed band of the operational factor of failure reconfiguration is wider, allows light overload in short-term; Dead electricity load can be recovered to greatest extent, accomplish as far as possible not dead electricity, dead electricity less of trying one's best, thus the waste of the energy be avoided in effective realization, arrives energy-conservation object.
Refer to shown in Fig. 6, it is the overall flow figure of the prevention and control of power distribution network of the present invention and the prevention and control of fault processing system and fault handling method, and technical solution of the present invention is divided into five large steps to perform, and step is as follows:
Step S1: collect facility information in network topological information and described power distribution network, and information is processed, namely first according to the main primary equipment of power distribution network, as: feeder line section, distribution transformer, set up relevant information table, obtain reliability index and the importance index of described equipment.
Collect, add up the rate of breakdown of the defect information of each equipment in power distribution network, service life, similar Distribution Network Equipment, obtain the reliability index of equipment in described power distribution network; The position residing in a network according to equipment in described power distribution network, calculate importance index, if after this equipment fault, do not restore electricity by interconnection, importance is high, and in situation of the same race, the load not by interconnection recovery is more, and significance level is higher; Can turn confession by interconnection for after equipment fault in this power distribution network, secondly, in situation of the same race, need the load that recovers more by interconnection after fault, importance is higher for importance;
The circular of reliability index and importance index is as follows:
First the value of variable corresponding to defect information, service life, same category of device rate of breakdown three factors is set.The defect rank a of equipment is divided into Three Estate: urgent defect, major defect, general defect, and the value of corresponding various defect a is respectively 3,2,1, does not have to get 0 during defect; When considering factor service life, arrange variable b, is on average divided into three equal time periods weekend life-cycle of equipment, equipment is in three different values 1,2,3 successively in period.When considering fault failure rate, arrange variable c, c=r/10, wherein r represents such equipment failure rate, times/year; The numerical computations of reliability index w:
w＝1/(1+a+m*b+n*c)
Wherein, m is the weight coefficient of b, and n is the weight coefficient of c, and m, n are respectively 0.2,0.1, and its value can adjust according to the experimental conditions of reality,
The calculating of importance index: arranging equipment importance index in described power distribution network is g; First, the important level of equipment in described power distribution network is divided into one, two, three by importance, and value is 3,2,1 respectively; According to network topology situation, verify, if in described power distribution network after equipment fault, the equipment that its lower end load can not carry out turning confession is classified as one-level; Can turn for but turn for scarce capacity, and burden requirement can not be met completely, be classified as secondary; All the other are classified as three grades.
Step S2: preventative index calculate, namely the set point K1 of preventive control, T1 is calculated according to reliability index and importance index, set the load factor maximum K1 of equipment in each power distribution network, and consider that actual loading rate K calculates the slight out-of-limit maximum time T1 of tolerance; If detect, in described power distribution network, the following short term memory of equipment, at overload situations and load factor K>1, is worked as K>K1, is then started preventive control; Work as 1<K<K1, then the time T according to overload judges, if during T>T1, starts preventive control, if T<T1, then refuses action.
P
overthe highest out-of-limit ratio
W is reliability index
G is importance index
A is constant, generally gets 30min, and the difference according to equipment can make the appropriate adjustments
A is value corresponding to equipment deficiency grade
K is the out-of-limit load factor of future time instance
K1 is load factor maximum
Step S3: the monitoring of current network state and following short term state, namely performs step S301 respectively: monitoring current state, judges whether fault and performs step S302: judging that whether to-be is normal according to prediction data; Be specially: gather real time information, detect power distribution network current state and following short term state, break down if current, then process according to pre-set troubleshooting measure, enter next step S4 process; If current fault-free, then judge future in a short time each equipment whether to there is operational factor out-of-limit, if having, control according to the principle trigger preventative in described step S2, enter next step S5 process.
Step S4: carry out troubleshooting, comprise the steps:
Step S41, described dead electricity load turns for module fast: first, according to the connection situation of network before fault, the switch opened with network interruption is starting point, and described switch is controlled, and two ends are all charged, close it and will form loop in a network, this switch is defined as interconnection switch, the loop in search network, be defined as basic ring, the branch road in the loop searched be defined as the element of basic ring; Loop successively in search network, forms basic ring matrix, the corresponding loop of a line, and each provisional capital has an interconnection switch corresponding with it; Then Fault Isolation is carried out, fault occurrence positions according to the fault message reported, because eliminating the switch of fault relaying protection action; In basic ring matrix, search for fault branch, if do not find this fault branch in basic ring matrix, namely there is no the region that interconnection is corresponding, drop into distributed power source and make its islet operation; If fault branch is present in certain a line of basic ring matrix, then by closing interconnection switch corresponding to that a line, recover the power supply to dead electricity region, if a faulty line is present in certain several row simultaneously, then the interconnection switch that closed that row comprising fault branch searched at first is corresponding, and after the closed interconnection switch of checking, whether network can safe and stable operation, if can, terminate troubleshooting, pending fault returns step S3 after repairing, if can not, enter second unit and process;
Step S42, after first unit is by closed interconnection, when can not meet sufficient supply of electric power, analyzes the network information and information on load, at the suitable regional inputs distributed power source that just restores electricity, provides more electric power; Verify that can existing distributed power source ensure to power to all loads, can then process terminate, then can not carry out the 3rd module and described second distributed power source input module;
Step S43, described failure reconfiguration module: after fault dead electricity, the distributed power source in fault dead electricity region can be out of service, first drops into distributed power source, ensures sufficient supply of electric power.
Use harmony algorithm, select which interconnection switch closed and which branch road of disjunction, maximum load rate in all feeder line section of whole network can be made minimum, and wherein using node voltage as inequality constraints, the scope that the bound of inequality is determined is larger a little than voltage range under normal condition;
Target function:
I
kfor the actual current value of each bar branch road
I
kavfor the load current value of each bar branch road
be meant to select each equipment in the whole network
maximum value
After the optimizing of harmony algorithm terminates, judge in harmony data base whether exist reconfiguration scheme make reconstruct after voltage in electrical network meet normal restraint requirement, if exist, then in these schemes, select the minimum scheme of target function value, if f<1, perform aforesaid operations, terminate troubleshooting, pending fault returns step S3 after repairing, if f>1, then enter the 4th unit cutting load; If there is not the reconfiguration scheme meeting normal voltage constraint requirements in electrical network after making reconstruct in harmony data base, then enter the cutting load module that the 4th module is namely described.
Step S44, described second cutting load module: first by the network topology after above-mentioned process, from power supply point, branch road is carried out hierarchical operations, all branch roads closest to power supply point are ground floor branch road, search for line end along radial networks, obtain all the other each layers successively; Travel through by layer, from the number of plies is maximum; Search certain branch road in certain one deck when having a situation of overload, suppose that the power factor of a load in power distribution network is consistent, and ignore the line loss on circuit, determine the apparent power s transshipped
over, when described system operational parameters allowed band is greater than normal range (NR), namely run exist in short-term slight out-of-limit time, can s be given
overbe multiplied by the coefficient that is less than 1, reduce cutting load amount, and carry out following process: search from the radial end of overload Zhi Luxiang, by the load that searches by load level 1, be divided three classes; First excise from three stage loads, select the combination of excision load, make cut load apparent power be greater than s
over, and ensure that this combination cutting load is minimum; If only cut three stage loads just can meet the demands, then this overload branch road is disposed, and continues other branch roads of traversal, if three stage load complete resections are complete, can not meet institute's cutting load amount apparent power and be greater than s
over, then cut two stage loads, the principle of excision is consistent with cutting three stage loads, by that analogy, to first order load; Continue to press layer search branch road, if there is overload branch road, by previous step method cutting load; Until do not transship in network circuit or all circuits traversal complete; The result of cutting load is exported, performs.
Step S5: perform step S501: preventive control, because index calculate belongs to the information pretreatment unit part of prevention and control, completes in described step 1 and described step S2; Therefore described step S5 comprises following three steps:
When detect there is index out-of-limit situation time, first call preventative reconstruct, to change network topology, drop into distributed power source and eliminate or reduce overload; If preventative reconstruct can eliminate overload, perform reconstruction result, after process terminates, return described step S3; If after fault reconstruct, out-of-limit situation is still had to exist, then by dropping into distributed power source, more electric power is provided, if distribution network also exists abnormal state on the basis of above-mentioned process, call cutting load, preferential guarantee important load, and ensure system safety stable operation when resection is minimum, return described step S3 after completing cutting load;
Step S51, described prevention reconstructed module: first, the switch opened with network interruption is starting point, described switch is controlled, and two ends are all charged, closes it and will form loop in a network, this switch is defined as interconnection switch, loop in search network, is defined as basic ring, the branch road in the loop searched is defined as the basic element of basic ring; Loop successively in search network, forms basic ring matrix, and the corresponding loop of a line, each provisional capital has an interconnection switch corresponding with it.Then, use harmony algorithm, select which interconnection switch closed and which branch road of disjunction, maximum load rate in all feeder line section of whole network can be made minimum, wherein using node voltage as inequality constraints, the bound of inequality is determined according to the scope of voltage under normal condition;
Target function:
I
kfor the actual current value of each bar branch road
I
kavfor the load current value of each bar branch road
be meant to select each equipment in the whole network
maximum value
Step S52, described second distributed power source drops into module: after first cell processing is complete, when can not meet sufficient supply of electric power, analyzes the network information and information on load, at the suitable regional inputs distributed power source that just restores electricity, provide more electric power.Verify that can existing distributed power source ensure to power to all loads, can then process terminate, then can not carry out the 3rd unit cutting load;
Step S53, the class of operation of the second cutting load described in the operation of described first cutting load and described step S4 is seemingly;
Use intelligent algorithm, according to the actual conditions of network, by adjustment System supply path, thus eliminate overload, eliminate risk; If can not eliminate overload situations completely by adjustment supply path, then, after adjustment supply path, carry out cutting load, method is consistent with the 5th step of described step S4, and the limit value of system operational parameters is with consistent during normal operation; The safe and stable operation of the safeguards system that simultaneously can take appropriate measures when recovering, the present invention is reasonable in design, comprehensive to the consideration of problem, agrees with the needs of power distribution network actual motion.
The foregoing is only preferred embodiment of the present invention, is only illustrative for invention, and nonrestrictive.Those skilled in the art is understood, and can carry out many changes in the spirit and scope that invention claim limits to it, amendment, even equivalence, but all will fall within the scope of protection of the present invention.
Claims (4)
1. the prevention and control of a power distribution network and fault processing system, it comprises a unified parametric controller, with an information acquisition unit, it is characterized in that, it also comprises: a prevention and control unit and a fault processing unit, and described unified parametric controller is connected with fault processing unit with described information acquisition unit, prevention and control unit respectively; Described information acquisition unit is used for information gathering, statistics and human-computer exchange and controls; Described prevention and control unit for predicting the irregular operating state of equipment in following short-term power distribution network, and controls prediction abnormal state out; Described fault processing unit is used for carrying out fast processing to the fault of equipment in power distribution network; Described unified parametric controller is used for being responsible for the information gathering of whole distribution system, the statistics of various data, the coordination and control of each functional unit;
Described prevention and control unit comprises one first index calculate module, described first index calculate module is used for according to facility information and network topological information in described power distribution network, preset index, store described topology information, for described fault processing unit provides Data support;
Described prevention and control unit also comprises a prevention reconstructed module, one first distributed power source drops into module and one first cutting load module;
Described prevention reconstructed module is used for when predicting following risky, by changing topology, eliminating or reducing risk;
When described first distributed power source input module does not meet the power supply of whole load for described prevention reconstructed module, drop into the distributed power source of respective volume at the correct position of described power distribution network, in order to ensure more supply of electric power;
Described first cutting load module be used for when the described first index calculate module in described prevention and control unit, described prevention reconstructed module and described first distributed power source input module all can not ensure all loads power or described power distribution network safe and reliable operation time, by excising the load of load level, in order to ensure system safety.
2. the prevention and control of power distribution network according to claim 1 and fault processing system, it is characterized in that, described fault processing unit comprises a dead electricity load and turns for module, one second distributed power source input module, a failure reconfiguration module and one second cutting load module fast;
Described dead electricity load turns for the topology information of module for analyzing and processing current network in advance fast;
When described second distributed power source input module does not meet sufficient power for turning confession module fast at described dead electricity load, analyze the network information and information on load, more electric power is provided;
Described failure reconfiguration module is used for failure reconfiguration and optimizes topology;
Described second cutting load module is used for the load by excising load level, in order to guarantee system safety stable operation.
3. the prevention and control of power distribution network according to claim 1 and fault processing system, it is characterized in that, described information acquisition unit comprises a network topological information acquisition module, a real-time traffic information acquisition module, a directive/guide library information input module and a load prediction MIM message input module;
Described network topological information acquisition module is used for Information Monitoring;
Described real-time traffic information acquisition module is used for the diverse location information of equipment in described network topology in power distribution network described in uninterrupted sampling;
Described directive/guide library information input module is used for the information collected to be entered in described information acquisition unit in time;
Described load prediction MIM message input module for judge negative charge amount in described equipment number and export a result detected.
4. the prevention and control of power distribution network according to claim 3 and fault processing system, it is characterized in that, described unified parametric controller comprises a data acquisition module, one second index calculate module, a state monitoring module and a control module coordination and control module;
The information that described data acquisition module gathers for collecting, adding up described information acquisition unit;
Described second index calculate module is used for the information result collected according to described data acquisition module, obtains the reliability index of equipment in described power distribution network, and calculates importance index;
Whether described state monitoring module breaks down for detecting equipment in described power distribution network;
Described control module coordination and control module for controlling the coordination and control of all modules in the prevention and control of described power distribution network and fault processing system, in order to guarantee in described power distribution network the normal and smooth operation of equipment.
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| CN104133995B (en) * | 2014-07-25 | 2017-02-22 | 国家电网公司 | Method for recognizing operation defects of electric power system in high-risk events |
| CN105186467A (en) * | 2015-07-15 | 2015-12-23 | 国网河南省电力公司漯河供电公司 | Distributed power fault analysis method and protection system |
| CN105303316A (en) * | 2015-11-01 | 2016-02-03 | 国网山东省电力公司聊城供电公司 | National power grid distribution network fault processing system |
| CN105552908A (en) * | 2016-02-23 | 2016-05-04 | 林福 | Self-healing control method of power distribution network |
| CN106712308B (en) * | 2017-03-31 | 2023-04-11 | 国网四川省电力公司德阳供电公司 | Portable opening and closing device and method |
| CN108988341B (en) * | 2018-09-05 | 2020-11-17 | 国网山东省电力公司枣庄供电公司 | Power distribution equipment fault adjusting method and device |
| CN110380406A (en) * | 2019-07-04 | 2019-10-25 | 深圳市朝阳辉电气设备有限公司 | A kind of control method and system of power supply system |
| CN110676844B (en) * | 2019-09-29 | 2022-04-05 | 许昌许继软件技术有限公司 | Intelligent power distribution network load transfer method and device |
| CN112751333B (en) * | 2019-10-30 | 2022-07-19 | 株洲中车机电科技有限公司 | Intelligent low-voltage switch cabinet for rail transit and control method |
| CN110957665B (en) * | 2019-11-09 | 2021-02-05 | 许继集团有限公司 | Transformer substation damaged situation display method and device |
| CN113113972B (en) * | 2021-06-15 | 2021-09-21 | 北京德风新征程科技有限公司 | Monitoring information generation method and device, electronic equipment and computer readable medium |
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