CN104377816A - Intelligent reclosure breaker and automatic reclosure control method thereof - Google Patents
Intelligent reclosure breaker and automatic reclosure control method thereof Download PDFInfo
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Abstract
An intelligent reclosure breaker comprises an operating mechanism, a current and electric leakage detection module, a power module, a voltage detection module, an electric reclosure mechanism, a control unit and a signal interaction module, wherein the voltage detection module is connected to the incoming line side of a main circuit and the rear end of a contact device; the signal interaction module is connected with the control unit and used for signal data interaction. According to an automatic reclosure control method, users can set which voltage faults need tripping and which instantaneous voltage faults allow automatic reclosure through the signal interaction module; the control unit carries out automatic judgment and controls whether the operating mechanism carries out tripping or not according to current signals and voltage signals input by the detection modules and threshold value parameters preset by the signal interaction module. After instantaneous voltage or current faults cause tripping, the control unit carries out automatic judgment to determine whether the faults are allowed to be recovered or not according to the voltage signals collected by the voltage detection module after the breaker trips and the threshold value parameters preset by the signal interaction module, and controls the electric reclosure mechanism whether to carry out electric reclosure or not.
Description
Technical field
The present invention relates to a kind of intelligentized reclosing breaker, can set by the needs in different power supply places the control method selecting automatic reclosing by user, no matter, after there is instantaneous voltage class fault (comprising instantaneous overvoltage, under-voltage, disconnected phase, the fault such as off zero) or instantaneous residual current fault, automatic reclosing can be carried out according to fault type intellectual determination and control before execution reclosing.
Background technology
Along with the development of low-voltage electrical apparatus and the universal of upgrade of rural power grids, traditional residual current action breaker can not meet the requirement of intelligent grid due to its function singleness, for improving the high continuation of electricity consumption and realizing network management and remote monitoring, there is the comprehensive circuit breaker simultaneously possessing automatic reclosing function miscellaneous on the market, on traditional residual current action breaker, mainly increase motor-operating mechanism to realize reclosing function, but because the national standard of reclosing product is not formally put into effect, still need constantly perfect to the requirement of reclosing breaker, producer can only design according to the market demand and experience, construction cycle in order to the blank accelerating to fill up upgrading of rural power grids demand all very short, design is still far from perfect, its function be still in only can after residual current fault trip the level of automatic reclosing, to meet the successional General Requirements that circuit automatically resumes operation and improves mains supply.At present, in existing residual current action breaker, achieve current capacity fault trip, and can specific to various fault types such as current overload, short circuit and electric leakages.But, a lot of product with automatic reclosing function is not with voltage sampling circuit, so just can not realize the automatic reclosing function after for the fault recovery of voltage class. for the residual current action breaker applied in such as rural power grids, also can for voltage class fault trip in the urgent need to it, and can automatic reclosing after tripping, automatically to recover normal power supply.
Chinese utility model patent CN201656420U discloses a kind of three-phase auto reclosing electricity leakage protection switch; the signal such as supply power voltage and short circuit, overload, electric leakage detected according to voltage detection module, current detection module and detection of electrical leakage module by micro control system module; control relay driver module performs tripping operation or closes a floodgate, before combined floodgate, carry out the too high or too low abnormality detection of supply power voltage, the electric leakage of circuit or short-circuit detecting to circuit.It is large that the reclosing strategy of this employing voltage, electric current complete detection realizes difficulty, even there is the difficult problem that cannot realize, as before reclosing, because circuit breaker is in tripped condition, namely circuit is in disjunction state, the electric leakage in circuit or short circuit current therefore cannot be detected.Moreover, control tripping operation according to the electric leakage of supply power voltage, circuit or the detection of short-circuit signal or close a floodgate, need the technical support of complicated powerful micro control system module, cause the manufacturing cost of micro control system module high thus, be therefore difficult in the small-sized residual current action breaker used in rural power grids practical.
Chinese invention patent CN 101447661 B discloses a kind of control method of the controller for automatic reclosing, only need for after the instantaneous voltage class fault of appearance the situation performing reclosing, single-chip microcomputer in the signal processing unit of its controller carries out under-voltage, decompression to the three-phase voltage signal that signal input unit detects and judges and voltage change ratio process, and performs separating brake and combined floodgate according to the circuit breaker that under-voltage, decompression and voltage change ratio control downstream.Thisly judge by three-phase voltage rate of change the control method that voltage is whether abnormal, comparatively common in high voltage supply system, but be applied to low-voltage power supply system, then owing to needing the support of divide-shut brake testing circuit and divide-shut brake signal thereof, therefore make the software and hardware structure of control system very complicated, not only cost is high, and is difficult to be placed in small-sized residual current action breaker.And judge overload and short circuit with voltage change ratio, directly can not reflect the exception of electric current, it detects overload and the method for short circuit and equipment thereof and residual current action breaker completely different, and (what residual current action breaker adopted is current transformer, it can be detected load current, short circuit current and residual current), therefore must increase multiple extra modular unit on residual current action breaker.In addition, these existing reclosing low-voltage circuit breakers can not judge the type tripped, and more can not adopt different automatic reclosing control way according to different tripping type, therefore, they in fact also do not have intelligentized reclosing function.
In addition, residual current action breaker realizes automatic reclosing, the unconditional limit of usual employing time reclosing strategy, namely in the certain hour (as 20s ~ 60s) after instantaneous residual current fault trip, circuit breaker can start automatic reclosing, before reclosing, namely do not do the detection of circuit parameter.The strategy of this unconditional reclosing may be think in people's subconsciousness that the voltage of leak current fault and mains side has nothing to do by the reason generally applied so far always, in other words, think that current capacity fault trip is only relevant with load-side current anomaly, therefore, can not expect carrying out voltage detecting before automatic reclosing and meet voltage normally just allowing to close a floodgate, the feature of conventional residual current action breaker does not have voltage detecting function, even if having voltage detecting function, then do not detect the voltage of mains side yet, in other words, think and tripping or cannot voltage detected under gate-dividing state.But, the applicant of long campaigns circuit breaker manufacture notices, the current overload of residual current action breaker, the reason of the current capacity fault trip such as short circuit and electric leakage, not only be the current failure of the load-side of circuit breaker, but also be the voltage failure of the mains side of circuit breaker, even the current signal only detected according to current sensing meanss such as Current Mutual Inductances performs the residual current action breaker of tripping operation, in its current signal, also imply the voltage signal of the mains side of circuit breaker.As thundered, rain when blowing, when circuit breaker electric source circuit because of the branch of humidity instantaneous lean against on a live wire time, circuit breaker trip can be caused, because thunderbolt causes the instantaneous voltage fluctuation of described circuit also can cause circuit breaker trip, just likely go out the situation having again voltage failure in the process of the execution reclosing after leak current fault recovers, or after voltage failure recovers, perform the situation having again voltage failure in the process of reclosing, the situation ignoring circuit current voltage is carried out disposable reclosing by this reclosing breaker making inlet wire side not possess voltage detecting function venturesomely, this will bring Electrical Safety hidden danger to subordinate equipment.
Summary of the invention
In order to overcome many defects of above-mentioned prior art, the present invention is on the existing basis with the residual current action breaker of automatic reclosing function, aim to provide the control method of a kind of intelligentized reclosing breaker and automatic reclosing thereof, not only can realize for instantaneous residual current class fault or for instantaneous voltage class fault trip, and different automatic reclosing control way can also be adopted according to different tripping type, achieve the intelligentized control method of low pressure reclosing breaker, especially while guarantee power supply continuity, fail safe can also be made to maximize, completely eliminate the Electrical Safety hidden danger that existing reclosing breaker may bring to subordinate equipment.
For achieving the above object, present invention employs following technical scheme.
A kind of intelligentized reclosing breaker, comprise control main circuit on/off contact apparatus 11, control contact apparatus 11 closed/operating mechanism 12 of disjunction, current detection module 21, detection of electrical leakage module 22 and power module 40, it is characterized in that: described circuit breaker also comprises the voltage detection module 23 being connected to main circuit inlet wire side and contact apparatus 11 rear end, and recloser mechanism 13, control unit 30 and be connected with described control unit 30 and carry out the mutual signal interactive module 31 of signal data; Each phase voltage signal that input A, B, C, N and contact apparatus 11 rear end respectively from main circuit collects is exported to described control unit 30 by described voltage detection module 23, and current detection module 21 and detection of electrical leakage module 22 are respectively by the output terminals A from main circuit ', each phase current signal of collecting of B ', C ', N ' exports to described control unit 30; The current signal that described control unit 30 inputs according to current detection module 21, detection of electrical leakage module 22, voltage detection module 23, voltage signal and the preset threshold parameter automatic decision of described signal interactive module 31 whether operating mechanism 12 described in controlling performs tripping operation; The voltage signal that described control unit 30 collects according to voltage detection module 23 after circuit breaker trip and the preset threshold parameter automatic decision of signal interactive module 31 whether recloser mechanism 13 described in controlling performs recloser.
Preferred: described control unit 30 comprises current signal conditioning circuit, voltage signal conditioning circuit, single-chip microcomputer and drive circuit, the current signal inputted from current detection module 21 and detection of electrical leakage module 22 exports to single-chip microcomputer after described current signal conditioning circuit process, the voltage signal inputted from voltage detection module 23 exports to single-chip microcomputer after voltage signal conditioning circuit process, and described Single-chip Controlling drive circuit performs tripping operation/automatic reclosing.
Preferred: described voltage detection module 23 adopts optocoupler and AD sample circuit.
Preferred: each phase voltage signal that described voltage detection module 23 gathers comprises overvoltage signal, under-voltage signal, default phase signal and signal off zero.
Preferred: described signal interactive module 31 comprises liquid crystal display circuit, the indicating circuit of operating state, button inputting circuits and communication interface circuit.
Preferred: described current detection module 21 and detection of electrical leakage module 22 adopt current transformer and zero sequence current mutual inductor respectively.
Preferred: described power module 40 comprises rectified three-phase circuit and bleeder circuit, rectified three-phase circuit is from input A, B, C, N power taking of main circuit, and bleeder circuit provides adaptive direct voltage respectively to the motor of voltage detection module 23, recloser mechanism 13, signal interactive module 31 and control unit 30.
Preferred: each phase current signal that described current detection module 21 and detection of electrical leakage module 22 gather comprises short circuit current signal, overload current signal and residual current signal.
For a control method for the automatic reclosing of the intelligentized reclosing breaker of the present invention, comprise the following steps:
A. which voltage class fault user sets by signal interactive module 31 needs tripping operation, which instantaneous voltage class fault permission automatic reclosing;
B. after instantaneous voltage class fault causes tripping operation, judged the instantaneous voltage class fault confirming to cause the voltage class fault of tripping operation whether to belong to permission by control unit 30, if step B judged result is yes, then continue step C; If step B judged result is no, then proceed to step F;
C. within the time of setting, control voltage detection module 23 by control unit 30 to monitor and whether still there is voltage class fault, if step C judged result is yes, then continue step D; If step C judged result is no, then proceed to step e;
D. control unit 30 does not start reclosing, and control signal interactive module 31 performs warning, and the voltage of input A, B, C, N of prompting main circuit is abnormal, until the normal automatic reclosing again of voltage resume;
E. control recloser mechanism 13 by control unit 30 to perform automatic reclosing and operate and control recloser mechanism 13 by control unit 30 and perform automatic reclosing and operate;
F. judge to identify whether to be the tripping operation caused by instantaneous leak current fault, if step F judged result is yes, then return step C; If process F judged result is no, then directly proceed to step e.
The another kind of control method being used for the automatic reclosing of the intelligentized reclosing breaker of the present invention, comprises the following steps:
A. which voltage class fault user sets by signal interactive module 31 needs tripping operation, which instantaneous voltage class fault permission automatic reclosing;
B. after instantaneous voltage class fault causes tripping operation, judged the instantaneous voltage class fault confirming to cause the voltage class fault of tripping operation whether to belong to permission by control unit 30, if step b judged result is no, proceed to step c, if step b judged result is yes, proceed to d;
C. control recloser mechanism 13 by control unit 30 to perform automatic reclosing and operate;
D. within the time of setting, control voltage detection module 23 by control unit 30 to monitor and whether still there is voltage class fault, if steps d judged result is no, then proceed to step c; If process c judged result is yes, then proceed to step e;
E. control unit 30 does not start reclosing, and control signal interactive module 31 performs warning, and the voltage of input A, B, C, N of prompting main circuit is abnormal, until the normal automatic reclosing again of voltage resume.
Existing residual current action breaker is more powerful for the function ratio of current detecting, and the voltage detecting of mains side is often lacked, although the signal of residual current can reflect the electric voltage exception of partial power side indirectly, but can not reflect comprehensively, particularly some important electric voltage exceptions, as the such as overvoltage caused due to lightning or upper end switching manipulation, under-voltage, the instantaneous fault etc. of disconnected equivalent voltage type, even if the existing automatic reclosing product with voltage sampling circuit, also often it can be used as a kind of measurement and display function of phase voltage, be not applied to the automatic reclosing after the fault recovery of voltage class, the basis preventing reclosing is it can be used as when again there is voltage failure in the process for execution reclosing if do not consider.And adopt above-mentioned arbitrary technical scheme of the present invention, can realize instantaneous leak current fault recover after can automatic reclosing (be called for short electric leakage class automatic reclosing) circuit breaker basis on introduce voltage sampling circuit in inlet wire side, realize can the function (be called for short voltage class automatic reclosing) of automatic reclosing after the fault recovery of voltage class, by the voltage detecting of reasonable applied power source side and the strategy according to voltage detecting execution automatic reclosing, the intelligence degree of automatic reclosing can not only be promoted, fast and safely can recover all kinds of instantaneous fault, also improve the grade of residual current action breaker safety protection function simultaneously, improve the power supply continuity of reclosing product for instantaneous fault further, and using the foundation of voltage monitoring as reclosing, while guarantee power supply continuity, if when again there is voltage failure in the process performing reclosing, immediately can stop reclosing, and not as disposable reclosing is carried out in prior art risk, add the security reliability of power supply, the perfect definition to reclosing product.
Accompanying drawing explanation
More clearly advantages and features of the invention can be found out from the description of the specific embodiment of residual current action breaker shown in the drawings, wherein:
Fig. 1 is the structured flowchart schematically illustrating intelligentized reclosing breaker of the present invention.
Fig. 2 is the internal structure floor map of intelligentized reclosing breaker of the present invention.
Fig. 3 controls the first enforcement control procedure flow chart included in the coincidence control procedure of intelligentized reclosing breaker of the present invention, shows the automatic reclosing process after the tripping operation caused in instantaneous voltage class fault.
Fig. 4 controls the second enforcement control procedure flow chart included in the coincidence control procedure of intelligentized reclosing breaker of the present invention, shows the automatic reclosing process after the tripping operation caused at instantaneous leak current fault.
Embodiment
Below in conjunction with the embodiment of the residual current action breaker that Fig. 1 to Fig. 2 provides, further illustrate the embodiment of intelligentized reclosing breaker of the present invention, they are just to explanation of the present invention, instead of limitation of the present invention.
For the limitation of the aspects such as existing product function and fail safe, intelligentized reclosing breaker of the present invention comprises contact apparatus, operating mechanism, recloser mechanism, for detecting main circuit A-A ', B-B ', C-C ', the current detection module of the size of current that N-N ' respectively flows through mutually, for detecting main circuit A-A ', B-B ', C-C ', the detection of electrical leakage module of the residual current size in N-N ', for the voltage detection module of the input terminal voltage situation of Real-Time Monitoring main circuit, control unit, signal interactive module and power module, for the residual current action breaker shown in Fig. 1 to Fig. 2, this reclosing breaker comprises the contact apparatus 11 controlling main circuit on/off, control contact apparatus 11 closed/operating mechanism 12 of disjunction, current detection module 21, detection of electrical leakage module 22, control unit 30, voltage detection module 23, recloser mechanism 13, signal interactive module 31 and power module 40.Signal interactive module 31 can set preset threshold parameter according to requirements at the scene, include which voltage class fault in these parameters and need tripping operation, which instantaneous voltage class fault allows automatic reclosing, the threshold value of the tripping operation of voltage class and current capacity tripping operation, the information such as the delay length of automatic reclosing, make the threshold parameter of automatic reclosing after tripping can select setting by user, circuit breaker can move reclosing mechanism according to the threshold parameter of setting with the voltage condition automatic control electric of the input implementing the main circuit monitored and whether perform automatic reclosing, the intelligent level of residual current action breaker is promoted further with this, the safe class of further raising circuit breaker, particularly effectively can get rid of the overvoltage of the input of main circuit, under voltage, phase shortage, the potential safety hazard waiting electric voltage exception off zero.The control method of automatic reclosing of the present invention is included in the automatic reclosing process after the tripping operation that instantaneous voltage class fault and instantaneous leak current fault cause, add the process of the voltage condition of the input of Real-Time Monitoring main circuit, and reclosing is performed again under the normal condition of voltage, the process of Real-Time Monitoring voltage is entered in the abnormal situation of voltage, until voltage normally automatically performs reclosing again, ensure that and only have when just allowing to close a floodgate under all normal condition of voltage.
Current detection module 21 and detection of electrical leakage module 22 can have multiple implementation, a kind of preferred mode as shown in Figure 2, described current detection module 21 and detection of electrical leakage module 22 adopt current transformer and zero sequence current mutual inductor respectively, its advantage is, structure is simple, and certainty of measurement, sensitivity and reliability etc. are all more satisfactory.Each phase current signal that described current detection module 21 and detection of electrical leakage module 22 collect comprises short circuit current signal, overload current signal and residual current signal, these current signals are baseband signals that current capacity fault appears in reflection main circuit, and also imply other class fault-signal in these baseband signals, as implied the unbalanced signal of each phase voltage of main circuit in residual current signal, these signals are likely because the electric voltage exception of input A, B, C, N of main circuit.
The voltage signal of voltage detection module 23 in Fig. 1 for input A, B, C, N of Real-time Collection main circuit and the voltage signal of Real-time Collection contact apparatus 11 rear end, and each phase voltage signal collected is exported to control unit 30.Voltage detection module 23 can have multiple implementation, and preferably, described voltage detection module 23 adopts optocoupler and AD sample circuit to one, its advantage is, structure is simple, and kind and the quantity of the electronic devices and components of use are few, low cost of manufacture, good reliability.Due to the input A of main circuit, B, C, the harm of N electric voltage exception is mainly overvoltage (voltage exceeds normal range (NR)), under-voltage (voltage low pressure normal range (NR)), phase shortage (A, B, a phase voltage is had to be zero in C three-phase firewire), (zero line N disconnects) off zero, each phase voltage signal that voltage detection module 23 gathers mainly comprises overvoltage signal, under-voltage signal, default phase signal and signal off zero, the present invention is after inlet wire side adopts voltage detection module 23, can at the input A of main circuit, B, C, there is overvoltage in N, under-voltage, phase shortage, start during voltage class fault such as grade off zero and automatically can recover normal trip protection, and when automatic reclosing, first must get rid of main circuit input A, B, C, the overvoltage of N, under-voltage, phase shortage, ability reclosing after fault such as class such as voltage such as grade off zero, because voltage sampling circuit of the present invention is introduced in end of incoming cables, no matter circuit breaker is in separating brake or "on" position, all can monitor current voltage in real time.No matter for electric leakage class automatic reclosing or voltage class automatic reclosing, all need to judge whether current voltage meets set point before execution overlaps, accomplish blindly not close a floodgate, the continuity of power supply and the fail safe of reclosing operation can be guaranteed.
Signal interactive module 31 shown in Fig. 1 can have multiple implementation, and preferably, described signal interactive module 31 comprises liquid crystal display circuit, the indicating circuit of various state, button inputting circuits and communication interface circuit to one.Liquid crystal display circuit comprises LCDs (not shown), can realize chart, parameter display, is also interactive display window simultaneously.The indicating circuit of various state comprises the indicator light of various state, as indicator of the power supply status, "on" position indicator light, gate-dividing state indicator light etc., with the running status of circuit breaker directly perceived.Button inputting circuits comprises button group (not shown) and button groups (not shown), button group is used for keying in data (as various threshold parameter), instruction to the single-chip microcomputer of control unit 30, and button groups is used for starting or switching state (as trial jump button).Communication interface circuit is used for providing various communication interface, and these interfaces can be used for telecommunication, control, detection etc.Obviously, after the present invention adopts signal interactive module 31, can effectively realize following effect: can for user select set tripping operation and automatic reclosing condition and confession human-computer dialogue and telecommunication, control, detection function, to promote intelligent level further.
In Fig. 1,2, contact apparatus 11 comprises moving contact, fixed contact, arc quenching system etc., known version can be adopted to realize, the on/off of main circuit (A-A ' as shown in Figure 1, B-B ', C-C ', N-N ') is controlled by moving contact, fixed contact, that is: when the moving contact of each phase of contact apparatus 11 and fixed contact close, main circuit A-A ' connects, B-B ' connects, C-C ' connects, N-N ' connects; When moving contact and the fixed contact disjunction of each phase of contact apparatus 11, main circuit A-A ' disconnects, B-B ' disconnects, C-C ' disconnects, N-N ' disconnects.Contact apparatus 11 closed/disjunction controls by operating mechanism 12, it comprises combined floodgate, separating brake, tripping operation three kinds of groundwork states, tripping operation causes operating mechanism 12 to perform the disjunction of contact apparatus 11 by the actuation device of control unit 30 (as magnetic flux release, not shown).Operating mechanism 12 can adopt known version to realize, and comprises not shown tripping mechanism etc.Control unit 30 shown in Fig. 1 can have multiple implementation, one preferably, described control unit 30 comprises current signal conditioning circuit, voltage signal conditioning circuit, single-chip microcomputer and drive circuit, the current signal that current detection module 21 and detection of electrical leakage module 22 input exports to single-chip microcomputer after current signal conditioning circuit process, the voltage signal that voltage detection module 23 inputs exports to single-chip microcomputer after voltage signal conditioning circuit process, current signal conditioning circuit is used for converting the current signal that current detection module 21 and detection of electrical leakage module 22 input to meet single-chip microcomputer input requirements signal type.In like manner, voltage signal conditioning circuit is used for converting the voltage signal that voltage detection module 23 inputs to meet single-chip microcomputer input requirements signal type.Single-chip Controlling drive circuit performs tripping operation/automatic reclosing.Described drive circuit comprises multiple loop, these loops control on/off by the output signal of single-chip microcomputer, actuation device is serially connected with (as the magnetic flux release that executable operations mechanism 12 trips in these loops, perform the combined floodgate of recloser mechanism 13 or the motor of separating brake, not shown).Single-chip microcomputer adopts general device to realize, it has the data interaction interface (not shown) embedding control program and key in controling parameters, and the I/O pin (not shown) of signal data, data interaction interface is connected with signal interactive module 31, each input pin is connected with each signal conditioning circuit respectively, and each output pin is connected with each drive circuit respectively.
Recloser mechanism 13 in Fig. 1,2 comprises motor (not shown) and transmission mechanism.The rotation of motor/stop being controlled by control unit 30, the on/off of the electric power loop of motor is specifically controlled by control unit 30 drive circuit, when electric power loop is connected, motor rotates, and the transmission mechanism that rotates through of motor drives operating mechanism 12 to perform closing operation.Motor adopts direct current micromotor, and DC power supply can be provided by power module 40.Described power module 40 can have multiple implementation, one preferably, described power module 40 comprises rectified three-phase circuit and bleeder circuit, rectified three-phase circuit is from input A, B, C, N power taking of main circuit, and bleeder circuit provides adaptive direct voltage respectively to the motor of voltage detection module 23, recloser mechanism 13, signal interactive module 31 and control unit 30.Obviously, after the present invention adopts the power module 40 of this structure and connected mode, following beneficial effect can be produced: under tripping operation, gate-dividing state, voltage detection module 23, recloser mechanism 13, signal interactive module 31 and control unit 30 can also normally work; When open-phase fault appears in input A, B, C, N of main circuit, also can ensure that voltage detection module 23, recloser mechanism 13, signal interactive module 31 and control unit 30 can also normally work.
Known by above-mentioned explanation, voltage detection module 23 of the present invention is by the input A respectively from main circuit, B, C, each phase voltage signal that N and contact apparatus 11 rear end collect exports to control unit 30, current detection module 21 and detection of electrical leakage module 22 are by the output terminals A from main circuit ', B ', C ', each phase current signal that N ' collects exports to control unit 30, signal interactive module 31 is connected with control unit 30 and to carry out signal data mutual, control unit 30 is according to current detection module 21, detection of electrical leakage module 22, the current signal that voltage detection module 23 inputs, voltage signal and the preset threshold parameter automatic decision of signal interactive module 31 whether control operation mechanism 12 performs tripping operation, the voltage signal that collects and the preset threshold parameter automatic decision of signal interactive module 31 after control unit 30 trips according to voltage detection module 23 also control recloser mechanism 13 and whether perform automatic reclosing.The control procedure of the automatic trip of the intelligentized reclosing breaker of the present invention has following characteristics: the defencive function including the various current capacity fault trips that existing residual current action breaker has, these current capacity faults are as overload, short circuit and electric leakage, also add the output terminals A of the main circuit that existing residual current action breaker does not have ' simultaneously, B ', C ', the defencive function of the voltage class fault trip of N ', these voltage class reclosings specifically comprise overvoltage, under-voltage, phase shortage, automatic reclosing after instantaneous fault recovery off zero, and can select neatly.Reclosing breaker of the present invention had both possessed the automatic reclosing function after the recovery of instantaneous leak current fault, also the automatic reclosing function after the fault recovery of instantaneous voltage class is possessed, and voltage class automatic reclosing function optionally can open and close according to different false voltage types, not only perfect in instantaneous power supply recovered from failure ability, ensure the continuity of power supply, also meet the demand of different user, achieving can general flexibility in different distribution system.
Below in conjunction with the embodiment that Fig. 1 to Fig. 4 provides, illustrate that intelligentized reclosing breaker of the present invention realizes three kinds of preferred implementations of the control method of automatic reclosing: trip to regulate and only detect for voltage class, only for the detection of residual current class with according to current capacity detection, the detection of voltage class and residual current class complete detection.These embodiments are just to explanation of the present invention, instead of limitation of the present invention.
The the first enforcement control procedure only detected for voltage class comprises the following steps:
A. which voltage class fault user sets by signal interactive module 31 needs tripping operation, which instantaneous voltage class fault permission automatic reclosing;
B. after instantaneous voltage class fault causes tripping operation, judged the instantaneous voltage class fault confirming to cause the voltage class fault of tripping operation whether to belong to permission by control unit 30, if step b judged result is no, proceed to step c, if step b judged result is yes, proceed to d;
C. control recloser mechanism 13 by control unit 30 to perform automatic reclosing and operate;
D. within the time of setting, control voltage detection module 23 by control unit 30 to monitor and whether still there is voltage class fault, if steps d judged result is no, then proceed to step c; If process c judged result is yes, then proceed to step e;
E. control unit 30 does not start reclosing, and control signal interactive module 31 performs warning, and the voltage of input A, B, C, N of prompting main circuit is abnormal, until the normal automatic reclosing again of voltage resume.
The function of the step b of the first execution mode judges to identify that whether tripping operation is that the overvoltage detected by voltage detection module 23, under-voltage, phase shortage and fault off zero cause, judged result is no, then illustrate that tripping operation is not that the overvoltage detected by voltage detection module 23, under-voltage, phase shortage and fault off zero cause, proceed to the automatic reclosing of step c thus.Step b judged result is yes, then illustrate tripping operation be by overvoltage, under-voltage, phase shortage and fault off zero beyond fault cause.Steps d function is whether the fault of input A, B, C, the N judging main circuit is got rid of, and judged result is yes, then illustrate that fault is got rid of, judged result is no, then illustrate that fault is not got rid of.Step e is actually the process that is waited for failture evacuation, just automatically transfers reclosing process to once failture evacuation.
The the second enforcement control procedure only detected for residual current class comprises the following steps:
A., after instantaneous leak current fault causes tripping operation, within the time of setting, control voltage detection module 23 by control unit 30 and monitor and whether still there is voltage class fault; If process g judged result is no, then proceed to step b, if process g judged result is yes, then proceed to step c;
B. control recloser mechanism 13 by control unit 30 to perform automatic reclosing and operate;
C. control unit 30 does not start reclosing, and control signal interactive module 31 performs warning, and the voltage of input A, B, C, N of prompting main circuit is abnormal, until the normal automatic reclosing again of voltage resume.
The function of the step a of the second execution mode judges whether input A, B, C, N of main circuit exist the process of residual current class fault to electric leakage class fault trip, judged result is yes, then account for voltage class fault still exists, judged result is no, then illustrate that input A, B, C, N of main circuit do not exist this type of fault, step c is actually the process that is waited for failture evacuation, just automatically transfers reclosing process to once failture evacuation.
Above-mentioned first enforcement control procedure and second is implemented control procedure and can independently be adopted, but when only adopting one of them process, may occur judging to identify incomplete problem, another kind of most preferredly to detect according to current capacity, voltage class detect and residual current class complete detection judge and control tripping operation and thereafter the control procedure (not shown) of reclosing be implement control procedure and second to implement control procedure superposition by above-mentioned first, namely the 3rd implement control procedure.
3rd implements control procedure comprises the following steps:
A. which voltage class fault user sets by signal interactive module 31 needs tripping operation, which instantaneous voltage class fault permission automatic reclosing;
B. after instantaneous voltage class fault causes tripping operation, judged the instantaneous voltage class fault confirming to cause the voltage class fault of tripping operation whether to belong to permission by control unit 30, if step B judged result is yes, then continue step C; If step B judged result is no, then proceed to step F;
C. within the time of setting, control voltage detection module 23 by control unit 30 to monitor and whether still there is voltage class fault, if step C judged result is yes, then continue step D; If step C judged result is no, then proceed to step e;
D. control unit 30 does not start reclosing, and control signal interactive module 31 performs warning, and the voltage of input A, B, C, N of prompting main circuit is abnormal, until the normal automatic reclosing again of voltage resume;
E. control recloser mechanism 13 by control unit 30 to perform automatic reclosing and operate and control recloser mechanism 13 by control unit 30 and perform automatic reclosing and operate;
F. judge to identify whether to be the tripping operation caused by instantaneous leak current fault, if step F judged result is yes, then return step C; If process F judged result is no, then directly proceed to step e.
Control logic of the present invention be using voltage detecting after situation as the foundation before reclosing; its basic condition to judge to cause the instantaneous fault of circuit breaker trip to be which kind of type; when residual electricity flow valuve in circuit reaches protection set point; circuit breaker can arrange according to user and carry out dropout trip operation; when meeting voltage class fault; automatic reclosing can perform close a floodgate before monitoring be whether permission can the voltage type of automatic reclosing, to ensure safety.So just fully take into account the various voltage types (overvoltage, under-voltage, phase shortage, off zero) of trip protection needed for user, made the user of different distribution occasions that the power supply continuity needed for guaranteeing to obtain is set by flexible selectivity.
The foregoing is only preferred embodiment of the present invention; all technical equivalences made according to the claims in the present invention change and amendment; all should be considered as within covering scope of the present invention, any innovation and creation do not exceeded in spirit of the present invention, all fall within protection scope of the present invention.
Claims (10)
1. an intelligentized reclosing breaker, comprise control main circuit on/off contact apparatus (11), control contact apparatus (11) closed/operating mechanism (12) of disjunction, current detection module (21), detection of electrical leakage module (22) and power module (40), it is characterized in that:
Described circuit breaker also comprises the voltage detection module (23) being connected to main circuit inlet wire side and contact apparatus (11) rear end, and recloser mechanism (13), control unit (30) and be connected with described control unit (30) and carry out the mutual signal interactive module (31) of signal data;
Input (A, B, C, N) respectively from main circuit and each phase voltage signal of collecting two-way from contact apparatus (11) rear end are exported to described control unit (30) by described voltage detection module (23), and each phase current signal collected from the output of main circuit (A ', B ', C ', N ') is exported to described control unit (30) by current detection module (21) and detection of electrical leakage module (22) respectively;
The threshold parameter automatic decision that the current signal that described control unit (30) inputs according to current detection module (21), detection of electrical leakage module (22), voltage detection module (23), voltage signal and described signal interactive module (31) are preset and control described in operating mechanism (12) whether perform tripping operation;
The voltage signal that described control unit (30) collects according to voltage detection module (23) after circuit breaker trip and the preset threshold parameter automatic decision of signal interactive module (31) whether recloser mechanism (13) described in controlling performs recloser.
2. intelligentized reclosing breaker according to claim 1, it is characterized in that: described control unit (30) comprises current signal conditioning circuit, voltage signal conditioning circuit, single-chip microcomputer and drive circuit, the current signal inputted from current detection module (21) and detection of electrical leakage module (22) exports to single-chip microcomputer after described current signal conditioning circuit process, the voltage signal inputted from voltage detection module (23) exports to single-chip microcomputer after voltage signal conditioning circuit process, described Single-chip Controlling drive circuit performs tripping operation/automatic reclosing.
3. intelligentized reclosing breaker according to claim 1, is characterized in that: described voltage detection module (23) adopts optocoupler and AD sample circuit.
4. intelligentized reclosing breaker according to claim 1, is characterized in that: each phase voltage signal that described voltage detection module (23) gathers comprises overvoltage signal, under-voltage signal, default phase signal and signal off zero.
5. intelligentized reclosing breaker according to claim 1, is characterized in that: described signal interactive module (31) comprises liquid crystal display circuit, the indicating circuit of operating state, button inputting circuits and communication interface circuit.
6. intelligentized reclosing breaker according to claim 1, is characterized in that: described current detection module (21) and detection of electrical leakage module (22) have employed current transformer and zero sequence current mutual inductor respectively.
7. intelligentized reclosing breaker according to claim 1, it is characterized in that: described power module (40) comprises rectified three-phase circuit and bleeder circuit, rectified three-phase circuit is from input (A, B, C, N) power taking of main circuit, and bleeder circuit provides adaptive direct voltage respectively to the motor of voltage detection module (23), recloser mechanism (13), signal interactive module (31) and control unit (30).
8. intelligentized reclosing breaker according to claim 1, is characterized in that: each phase current signal that described current detection module (21) and detection of electrical leakage module (22) gather comprises short circuit current signal, overload current signal and residual current signal.
9., for the control method of the automatic reclosing of the intelligentized reclosing breaker of any one described in claim 1 to 8, comprise the following steps:
A. which voltage class fault user sets by signal interactive module (31) needs tripping operation, which instantaneous voltage class fault permission automatic reclosing;
B., after instantaneous voltage class fault causes tripping operation, judged to confirm to cause the voltage class fault of tripping operation whether to belong to the instantaneous voltage class fault of permission by control unit (30), if step B judged result is yes, then continue step C; If step B judged result is no, then proceed to step F;
C. within the time of setting, control voltage detection module (23) by control unit (30) and monitor whether still there is voltage class fault, if step C judged result is yes, then continue step D; If step C judged result is no, then proceed to step e;
D. control unit (30) does not start reclosing, and control signal interactive module (31) performs warning, and the voltage of the input (A, B, C, N) of prompting main circuit is abnormal, until the normal automatic reclosing again of voltage resume;
E. operated by control unit (30) control recloser mechanism (13) execution automatic reclosing and operated by control unit (30) control recloser mechanism (13) execution automatic reclosing;
F. judge to identify whether to be the tripping operation caused by instantaneous leak current fault, if step F judged result is yes, then return step C; If process F judged result is no, then directly proceed to step e.
10., for the control method of the automatic reclosing of the intelligentized reclosing breaker of any one described in claim 1 to 8, comprise the following steps:
A. which voltage class fault user sets by signal interactive module (31) needs tripping operation, which instantaneous voltage class fault permission automatic reclosing;
B. after instantaneous voltage class fault causes tripping operation, judged to confirm to cause the voltage class fault of tripping operation whether to belong to the instantaneous voltage class fault of permission by control unit (30), if step b judged result is no, proceed to step c, if step b judged result is yes, proceed to d;
C. control recloser mechanism (13) execution automatic reclosing by control unit (30) to operate;
D. within the time of setting, control voltage detection module (23) by control unit (30) and monitor whether still there is voltage class fault, if steps d judged result is no, then proceed to step c; If process c judged result is yes, then proceed to step e;
E. control unit (30) does not start reclosing, and control signal interactive module (31) performs warning, and the voltage of the input (A, B, C, N) of prompting main circuit is abnormal, until the normal automatic reclosing again of voltage resume.
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| CN117872109A (en) * | 2023-12-18 | 2024-04-12 | 广东柏腾物联科技有限公司 | Automatic-verification Internet of things circuit breaker and verification control method thereof |
| CN118884206A (en) * | 2024-09-26 | 2024-11-01 | 乐清市华美电器有限公司 | A method for detecting abnormal reclosing of a reclosing circuit breaker |
| CN119209431A (en) * | 2024-09-29 | 2024-12-27 | 中发信息咨询(浙江)有限公司 | An adjustable digital reclosing switch with circuit detection and its control system |
| CN119209431B (en) * | 2024-09-29 | 2025-08-19 | 中发信息咨询(浙江)有限公司 | Adjustable digital reclosing and control system with circuit detection function |
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| CN104377816B (en) | 2017-07-25 |
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Application publication date: 20150225 Assignee: Wenzhou Zhengtai Electrical Technology Co., Ltd Assignor: Zhejiang Chint Electrics Co.,Ltd. Contract record no.: X2020330000078 Denomination of invention: An intelligent reclosing circuit breaker and its automatic reclosing control method Granted publication date: 20170725 License type: Common License Record date: 20201021 |