CN202178564U - Electric leakage comprehensive protector - Google Patents
Electric leakage comprehensive protector Download PDFInfo
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- CN202178564U CN202178564U CN2011202301823U CN201120230182U CN202178564U CN 202178564 U CN202178564 U CN 202178564U CN 2011202301823 U CN2011202301823 U CN 2011202301823U CN 201120230182 U CN201120230182 U CN 201120230182U CN 202178564 U CN202178564 U CN 202178564U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
Provided is an intelligent electric leakage comprehensive protector having a communication function, comprising a zero sequence current transformer, an A phase load current transformer, a B phase load current transformer, a C phase load current transformer, a voltage divider, a signal conditioning circuit, a one-chip microcomputer, a switching device, a communication module, and a power supply, wherein the zero sequence current transformer, the A phase load current transformer, the B phase load current transformer, the C phase load current transformer, and the output of the voltage divider are connected with the signal conditioning circuit; the output of the signal conditioning circuit is connected with the one-chip microcomputer; the switching device is connected with the one-chip microcomputer; and the communication module is connected with the one-chip microcomputer. The electric leakage comprehensive protector of the utility model can achieve the protection of overcurrent, short circuit, electric leakage, and abnormal voltage (over-voltage or under-voltage) and is provided with the function of time-delay motion and autoreclosing. A plurality of intelligent electric leakage comprehensive protectors can form an earth leakage protection monitoring network via the communication modules thereof in a flexible manner, thereby achieving low voltage electrical network earth leakage protection remote monitoring.
Description
Technical field
The technical scheme of the utility model relate to a kind of have communication function, to the automatic disconnection emergency protective circuit device that the undesirable variation that departs from the normal electrical working condition directly reacts, specifically a kind of intelligent leakage comprehensive protector and operation method thereof with communication function.
Background technology
Aftercurrent protecting equipment <being earth leakage protective device>is a kind of visual plant in the low voltage electric network, is playing an important role aspect prevent to leak electricity fire and the personal electric shock of protection.At present; Aftercurrent protecting equipment generally has been installed in the low voltage electric network; But there is following problem in existing Aftercurrent protecting equipment: (1) only can provide basic protection (like RCCB patent CN101562328A), damages because of overcurrent, short circuit or overvoltage for preventing distribution transformer; Other protection electrical equipment such as fuse also to be installed when Aftercurrent protecting equipment is installed, so just cause the increase of distribution box volume, cost to improve.(2) existing Aftercurrent protecting equipment does not generally possess communication function, is unit operation basically, and the operation conditions that can't electrical network be provided for power department is the data of residual current situation particularly; Simultaneously, power department is managed also comparatively loaded down with trivial details to it, needs to send special messenger's periodical inspection.Therefore the Aftercurrent protecting equipment of electrical network can't satisfy the demand that power department is monitored low voltage electric network at present, can not adapt to the requirement of following intelligent grid development.
In order to overcome above problem; Many people have proposed the integrated intelligent multifunctional leakage protector that solution: CN1373490A proposes a kind of novel structure; Adopt electromagnetic actuation, discharge and control the main switch tripping operation, close a floodgate, this structure is more simple in structure than the electronic combined floodgate of circuit breaker, and action does not receive the corrosion of air pollution, salty wet sea wind, acid mist etc.; Can reach more than 100000 times electric under the bringing onto load condition, mechanical endurance; Be assembled in the box body with current transformer, signal processing circuit, make protector can easily realize overcurrent, short circuit, creepage protection function, but this earth leakage protective device do not possess the voltage protection function; Do not possess communication function yet, can not solve the problem that exists in the existing Aftercurrent protecting equipment well.CN101969288A has proposed a kind of both can wiredly receiving and dispatching of gsm wireless mechanics of communication and electric line carrier communication technology of adopting; But the communications adapter of the special-purpose multifunctional RCCB of wireless receiving and dispatching again; Be used to transmit RCCB setup parameter relevant information and control instruction; Automatically the separating brake of accomplishing after tripping is detained and the reclosing action again, and electrical network is in time put into operation.Though this communications adapter has communication function; But must be used with earth leakage protective device and could realize defencive function; This communications adapter only can be realized the both-way communication between earth leakage protective device and the control appliance in addition; And do not possess the function of setting up the earth leakage protective monitor network, so its application has certain limitation.
In a word, existing technology does not all solve the problem that exists in the Aftercurrent protecting equipment well.
The utility model content
The purpose of the utility model is: a kind of intelligent leakage comprehensive protector with communication function is provided: this leakage comprehensive protector compact conformation, functional integration height; Can protection be provided to overcurrent, short circuit, electric leakage, electric voltage exception (overvoltage or under-voltage) fault; Has multiple communication modes again based on wire communication, wireless telecommunications and national public mobile network; Can set up the earth leakage protective monitor network neatly, overcome present earth leakage protective device function singleness, can not realize the shortcoming of networked control; Solve the problem that exists in the present Aftercurrent protecting equipment well, and had deferred action and automatic reclosing function.
The technical scheme that solves the problems of the technologies described above is:
A kind of leakage comprehensive protector comprises zero sequence current mutual inductor, A phase load current transformer, B phase load current transformer, C phase load current transformer, voltage divider, signal conditioning circuit, single-chip microcomputer, switching device, communication module and power supply; Wherein, the output of zero sequence current mutual inductor, A phase load current transformer, B phase load current transformer, C phase load current transformer and voltage divider is connected with signal conditioning circuit, and the output of signal conditioning circuit links to each other with single-chip microcomputer; Switching device is connected with single-chip microcomputer; Communication module is connected with single-chip microcomputer; The input of power supply is connected with electrical network, and the output of power supply is connected with signal conditioning circuit, single-chip microcomputer and communication module.
Described switching device is air circuit or relay.
Described signal conditioning circuit is made up of leakage current signal modulate circuit, voltage signal modulate circuit and load current signal conditioning circuit three partial function circuit; Wherein, The leakage current signal modulate circuit is made up of operational amplifier, resistor, capacitor, diode; Be used to handle the leakage current signal of zero sequence current mutual inductor input, the input of leakage current signal modulate circuit is connected with the output of zero sequence current mutual inductor, and the output of leakage current signal modulate circuit is connected with single-chip microcomputer; The voltage signal modulate circuit partly is made up of three identical in structure; They constitute by operational amplifier, resistor, capacitor and diode; Be used to handle three-phase voltage signal by the voltage divider input; The input of voltage signal modulate circuit is connected with the output of voltage divider, and the output of voltage signal modulate circuit is connected with single-chip microcomputer; The load current signal conditioning circuit partly is made up of three identical in structure; They constitute by operational amplifier, resistor, capacitor and diode; Be used to handle three-phase load current signal by the input of load current instrument transformer; The input of load current signal conditioning circuit is connected with the output of A phase load current transformer, B phase load current transformer, C phase load current transformer respectively, and the output of load current signal conditioning circuit is connected with single-chip microcomputer;
Described communication module is formed by wireless communication line, wire communication circuit with based on the communicating circuit three partial function circuit of mobile communication network, and wherein, wireless communication line is the modular circuit based on the wireless telecommunications integrated circuit; The wire communication circuit is the modular circuit based on field bus technique; Communicating circuit based on mobile communication network is the data transmission module that utilizes mobile communication network;
Described mobile communication network is GSM mobile communication network, CDMA/CDMA2000 mobile communication network, WCDMA mobile communication network or TDSCDMA mobile communication network;
Described leakage comprehensive protector can also comprise following auxiliary part: electric leakage simulative generator, keyboard/display circuit, real time clock circuit, external memory storage and frequency detection circuit; These auxiliary parts all are connected with single-chip microcomputer with power supply.
The beneficial effect of the utility model compared with prior art, has the following advantages:
The intelligent leakage comprehensive protector with communication function of the utility model can be realized overcurrent, short circuit, electric leakage, electric voltage exception (overvoltage or under-voltage) protection; Have deferred action and automatic reclosing function; And has a communication function; Many intelligent leakage comprehensive protectors can be formed the earth leakage protective monitor network with flexible way through communication module separately; Realize the remote monitoring of low voltage electric network earth leakage protective, simultaneously, can also utilize mobile communication network (GSM, CDMA/CDMA2000, WCDMA, TDSCDMA) and user mobile phone or upper machine communication as the intelligent leakage comprehensive protector of control centre; The user also can check or revise the parameter setting of intelligent leakage comprehensive protector node in the network through mobile phone or host computer, and can realize long-range breaking-closing operating through mobile phone or host computer.Therefore, adopt the intelligent leakage comprehensive protector with communication function of the utility model to have the complete protection function, and can carry out network communication, the staff can be monitored the ruuning situation of electrical network whenever and wherever possible.And existing earth leakage protective device function is comparatively single, and does not generally possess communication function, and user's use is restricted, and can't satisfy the demand that power department is monitored low voltage electric network, can not adapt to the requirement of power network development.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the connection block diagram between each part of leakage comprehensive protector among the embodiment 1.
Fig. 2 is the connection block diagram between each part of leakage comprehensive protector among the embodiment 2.
Fig. 3 is the connection sketch map that the utility model is formed monitor network.
Fig. 4 a is the circuit connection diagram of the circuit part except that communication module of the embodiment 2 of the utility model, and 4b is the communication module circuit of the embodiment 2 of the utility model.
The leakage comprehensive protector that Fig. 5 a is the leakage comprehensive protector of a utility model flow chart of realizing defencive function, Fig. 5 b is the utility model realizes that the flow chart of communication sending function, leakage comprehensive protector that Fig. 5 c is the utility model realize the flow chart of communication receiving function.
Among the figure, 1---zero sequence current mutual inductor; 2---A phase load current transformer; 3---B phase load current transformer; 4---C phase load current transformer; 5---voltage divider; 6---signal conditioning circuit; 7---single-chip microcomputer; 8---switching device; 9---communication module; 10---power supply; 11---the electric leakage simulative generator; 12---keyboard/display circuit; 13---real time clock circuit; 14---external memory storage; 15---frequency detection circuit; 16---leakage comprehensive protector.
Embodiment
Fig. 1 shows that the intelligent leakage comprehensive protector with communication function of the utility model comprises zero sequence current mutual inductor (1), A phase load current transformer (2), B phase load current transformer (3), C phase load current transformer (4), voltage divider (5), signal conditioning circuit (6), single-chip microcomputer (7), switching device (8), communication module (9) and power supply (10).
Its annexation is: the leakage current in zero sequence current mutual inductor (1) the sensing electrical network; Load current in A phase load current transformer (2), B phase load current transformer (3) and C phase load current transformer (4) sense line, voltage divider (5) sense line voltage; The output of zero sequence current mutual inductor (1), A phase load current transformer (2), B phase load current transformer (3), C phase load current transformer (4) and voltage divider (5) is connected with signal conditioning circuit (6); The output of signal conditioning circuit (6) links to each other with single-chip microcomputer (7), and single-chip microcomputer (7) is responsible for the analysis and the processing of signal; Switching device (8) is connected with single-chip microcomputer (7), under the control of single-chip microcomputer (7), accomplishes the action of threading off with the disengagement failure circuit; Communication module (9) is connected with single-chip microcomputer (7), under the control of single-chip microcomputer (7), accomplishes communication function; Power supply (10) is signal conditioning circuit (6), single-chip microcomputer (7) and communication module (9) power supply.
Shown in Fig. 4 a and Fig. 4 b; Among the embodiment: zero sequence current mutual inductor RCT (1), A phase load current transformer (2), B phase load current transformer (3), C phase load current transformer (4), voltage divider (5) are connected with signal conditioning circuit (6) respectively; The output of signal conditioning circuit (6) is connected to single-chip microcomputer (7), for single-chip microcomputer (7) provides leakage current, load current and line voltage signal; Communication module (9) is connected with single-chip microcomputer (7), under the control of single-chip microcomputer (7), accomplishes communication function; Button/display circuit (12) is connected and receives the control of single-chip microcomputer (7) with single-chip microcomputer (7); Display circuit (12) circulation shows leakage current, load current and line voltage distribution; And show specified operating value, the operate time of earth leakage protective, overcurrent protection and electric voltage exception protection and cause the reason and the fault value of action that keyboard (12) is used to select specified operating value, operate time and query history record; Real time clock circuit (13) is connected and receives the control of single-chip microcomputer (7) with single-chip microcomputer (7), for intelligent leakage comprehensive protector provides real-time time; External memory storage (14) is connected and receives the control of single-chip microcomputer (7) with single-chip microcomputer (7), leakage current, load current, line voltage distribution and fault message when being used to store the circuit operation; Frequency detection circuit (15) is connected with single-chip microcomputer (7), with mains frequency signal input single-chip microcomputer (7); Circuit (11) simulation takes place and produces the fault electric leakage in the electric leakage simulation; Power supply (10) is single-chip microcomputer (7), signal conditioning circuit (6), communication module (9), button/display circuit (12), real time clock circuit (13), external memory storage (14) and frequency detection circuit (15) power supply.
Shown in Fig. 4 a, among the embodiment: the electric leakage instrument transformer that zero sequence current mutual inductor (1) is made for the 1J85 permalloy, its internal diameter is 40mm; The electromagnetic current transducer that A phase load current transformer (2), B phase load current transformer (3) and C phase load current transformer (4) are made for silicon steel sheet, rated current is 100A; Voltage divider (5) is made up of resistor in series; Signal conditioning circuit (6) is made up of operational amplifier, resistor, capacitor and diode, is divided into three functional circuits: operational amplifier U6A and the resistor that is attached thereto, capacitor and diode are formed the leakage current signal modulate circuit; Operational amplifier U3A, U4A, U4B and the resistor that links to each other with them, capacitor and diode are formed the voltage signal modulate circuit; Operational amplifier U3B, U4C, U4D and the resistor that links to each other with them, capacitor and diode are formed the load current signal conditioning circuit; The model of operational amplifier is MCP6004 in the signal conditioning circuit (6); Power supply (10) is made up of Industrial Frequency Transformer, diode 1N4007,220 microfarad electrolytic capacitors and integrated circuit LM7805; Single-chip microcomputer (7) is the ATmega32 chip microprocessor; Switching device (8) is the air circuit of rated current 100A, also can be relay.This three partial functions circuit of leakage current signal modulate circuit, voltage signal modulate circuit and load current signal conditioning circuit is circuit known in this field, and its composition and annexation are that those of ordinary skills are known.The electric leakage signal modulate circuit is made up of operational amplifier, resistor, capacitor and diode, is used to handle the leakage current signal of zero sequence current mutual inductor input; The voltage signal modulate circuit partly is made up of three identical in structure, and they constitute by operational amplifier, resistor, capacitor and diode, is used to handle the three-phase voltage signal by the voltage divider input; The load current signal conditioning circuit partly is made up of three identical in structure, and they constitute by operational amplifier, resistor, capacitor and diode, is used to handle the three-phase load current signal by the input of load current instrument transformer.
Shown in Fig. 4 b; Among the embodiment: communication module (9) is made up of integrated circuit, SIM slot, resistor, capacitor, inductance coil, diode, triode, crystal oscillator and radio-frequency antenna, is divided into three functional circuits: integrated circuit U15nRF2401, resistor, capacitor, crystal oscillator, inductance coil and radio-frequency antenna RF ANT constitute the wireless communication line of communication module (9); Integrated circuit U7MAX485, photoelectrical coupler U5, U9, U10 (PS2501), resistor and triode constitute the wire communication circuit of communication module (9); Integration module U14SIM300C, SIM slot U16, resistor, capacitor, triode and diode constitute the communicating circuit based on mobile communication network of communication module (9), among the embodiment, adopt the GSM mobile communication network.
Fig. 1 shows; Be input to single-chip microcomputer (7) after the output signal of zero sequence current mutual inductor (1), A phase load current transformer (2), B phase load current transformer (3), C phase load current transformer (4) and voltage divider (5) is nursed one's health, amplified through signal conditioning circuit (6) and carry out analog-to-digital conversion; Single-chip microcomputer (7) is analyzed the electric parameter of gathering and is judged; Accomplish electric leakage, overload, electric voltage exception protection, its course of work and operation method are:
(a) when leakage current meets or exceeds the residual operating current threshold value, single-chip microcomputer (7) delay adjustments sends the order of threading off after the time, makes switching device (8) action, and switching device (8) disengagement failure circuit is protected the fault electric leakage.
(b) when the load current in the circuit met or exceeded overcurrent protection action threshold value, single-chip microcomputer (7) delay adjustments sent the order of threading off after the time, made switching device (8) action, and switching device (8) disengagement failure circuit is protected overload current.
(c) when line voltage distribution was higher than overvoltage protection action threshold value or be lower than under-voltage protection action threshold value, single-chip microcomputer (7) delay adjustments sent the order of threading off after the time, made switching device (8) action, and switching device (8) disengagement failure circuit is protected electric voltage exception.
Fig. 1 shows; Every intelligent leakage comprehensive protector all has communication module (9); Communication module (9) is realized communication function under the control of single-chip microcomputer (7), its course of work and operation method are: many intelligent leakage comprehensive protectors communication module (9) through separately interconnects forms the earth leakage protective monitor network, and this connected mode can be wired mode; Also can be wireless mode, can also be the combination of wired mode and wireless mode; Every leakage comprehensive protector all is a network node, and any one network node can both be as the control centre of network, but same time inner control center is unique; Control centre controls the operation of whole network; Be responsible for collecting the real-time running data and the fault message of each network node institute protection circuit; While is the operating state of Control Network node also, and control centre can also utilize mobile communication network and user mobile phone or upper machine communication, informs the running status of user network node; The user also can check or revise the parameter setting of arbitrary node in the network through mobile phone or host computer, and can carry out long-range breaking-closing operating to it through mobile phone or host computer.
Fig. 2 shows; Be added with the intelligent leakage comprehensive protector with communication function of the utility model of auxiliary circuit, comprise zero sequence current mutual inductor (1), A phase load current transformer (2), B phase load current transformer (3), C phase load current transformer (4), voltage divider (5), signal conditioning circuit (6), single-chip microcomputer (7), switching device (8), communication module (9) and power supply (10), electric leakage simulative generator (11), keyboard/display circuit (12), real time clock circuit (13), external memory storage (14) and frequency detection circuit (15).
Its annexation is: the leakage current in zero sequence current mutual inductor (1) the sensing electrical network; Load current in A phase load current transformer (2), B phase load current transformer (3) and C phase load current transformer (4) sense line, voltage divider (5) sense line voltage; The output of zero sequence current mutual inductor (1), A phase load current transformer (2), B phase load current transformer (3), C phase load current transformer (4) and voltage divider (5) is connected with signal conditioning circuit (6); The output of signal conditioning circuit (6) links to each other with single-chip microcomputer (7), and single-chip microcomputer (7) is responsible for the analysis and the processing of signal; Switching device (8) is connected with single-chip microcomputer (7), under the control of single-chip microcomputer (7), accomplishes the action of threading off with the disengagement failure circuit; Communication module (9) is connected with single-chip microcomputer (7), under the control of single-chip microcomputer (7), accomplishes communication function; The electric leakage analog circuit is connected with single-chip microcomputer, is used to check whether the protector work of the utility model is normal; Keyboard/display circuit (12) is connected with single-chip microcomputer (7), under the control of single-chip microcomputer (7), accomplishes the circulation that the real-time electric parameter of circuit and protector are provided with parameter and shows, and through keyboard (12) user's personal settings are passed to single-chip microcomputer (7); Real-time clock (13) is connected with single-chip microcomputer, for single-chip microcomputer (7) provides real-time clock signal; External memory storage (14) is connected with single-chip microcomputer (7), leakage current, load current, line voltage distribution and fault message when being used for regularly storing the circuit operation; Frequency detection circuit (15) directly obtains AC signal and is shaped to square-wave signal input single-chip microcomputer (7) through the zero balancing circuit from electrical network; Power supply (10) is signal conditioning circuit (6), single-chip microcomputer (7), communication module (9), electric leakage simulative generator (11), keyboard/display circuit (12), real time clock circuit (13), external memory storage (14) and frequency detection circuit (15) power supply.
Be added with the basic function of leakage comprehensive protector among the miscellaneous function expansion embodiment, help the user to use this device more easily.
Be input to single-chip microcomputer (7) after the output signal of zero sequence current mutual inductor (1), A phase load current transformer (2), B phase load current transformer (3), C phase load current transformer (4) and voltage divider (5) is nursed one's health, amplified through modulate circuit (6) and carry out analog-to-digital conversion; Single-chip microcomputer (7) is analyzed these electric parameters and is judged; Accomplish electric leakage, overload, electric voltage exception protection, its course of work and operation method are:
(a) when leakage current meets or exceeds the residual operating current threshold value, single-chip microcomputer (7) delay adjustments sends the order of threading off after the time, makes switching device (8) action, and switching device (8) disengagement failure circuit is protected the fault electric leakage.
(b) when the load current in the circuit met or exceeded overcurrent protection action threshold value, single-chip microcomputer (7) delay adjustments sent the order of threading off after the time, made switching device (8) action, and switching device (8) disengagement failure circuit is protected overload current.
(c) when line voltage distribution was higher than overvoltage protection action threshold value or be lower than under-voltage protection action threshold value, single-chip microcomputer (7) delay adjustments sent the order of threading off after the time, made switching device (8) action, and switching device (8) disengagement failure circuit is protected electric voltage exception.
The intelligence leakage comprehensive protector is because of after electric leakage, overcurrent or electric voltage exception thread off, when the automatic reclosing function is unlocked, then in 40s～60s automatic reclosing once, if fault still exists and then threads off once more and make switching device (8) locking behind the reclosing.In addition, if the power-failure protecting function is unlocked, when line outage, single-chip microcomputer (7) will send the order of threading off, and make switching device (8) action to cut off circuit, treat voltage recover normal after with automatic reclosing to restore electricity.
Every intelligent leakage comprehensive protector all has communication module (9); Communication module (9) is realized communication function under the control of single-chip microcomputer (7); Its course of work and operation method are: many intelligent leakage comprehensive protectors communication module (9) through separately interconnects forms the earth leakage protective monitor network; This connected mode can be wired mode, also can be wireless mode, can also be the combination of wired mode and wireless mode; Every leakage comprehensive protector all is a network node, and any one network node can both control the operation of whole network as the control centre of network, but same time inner control center is unique; Control centre is responsible for collecting the real-time running data and the fault message of each network node institute protection circuit; While is the operating state of Control Network node also; Control centre can also utilize mobile communication network and user mobile phone or upper machine communication; The user can check or revise the parameter setting of any node in the network through short message or host computer, and can carry out long-range breaking-closing operating to it through short message or host computer.
The auxiliary part of the intelligent leakage comprehensive protector with communication function of the utility model realizes that the operation method of booster action is: single-chip microcomputer (7) is delivered to display circuit (12) with leakage current, load current and line voltage distribution; Display circuit (12) circulation shows leakage current, load current and line voltage distribution, and shows that earth leakage protective, overcurrent protection and electric voltage exception protect specified operating value, operate time and cause the reason and the fault value of action.Keyboard (12) is used to select specified operating value, operate time and query history record.Real time clock circuit (13) provides real-time time for intelligent leakage comprehensive protector, is used for failure logging and history run record, makes the user can understand the running status of circuit in more detail.Leakage current, load current and line voltage distribution and fault message when external memory storage (14) is used for regularly storing the circuit operation make things convenient for user inquiring.Frequency detection circuit (15) directly obtains AC signal and is shaped to square-wave signal input single-chip microcomputer (7) through the zero balancing circuit from electrical network; Single-chip microcomputer (7) detects input signal; And the signal of one-period carried out timing; Detect the time of one-period, realize mains frequency from motion tracking.Circuit (11) takes place in the electric leakage simulation simulates the electric leakage of generation fault, when single-chip microcomputer (7) detects the simulated failure electric leakage, sends the electric leakage dropout and orders, and is used to check whether the protector work of the utility model is normal.Power supply (10) is these circuit supplies simultaneously.
Fig. 3 shows that the intelligent leakage comprehensive protector with communication function of many playscripts with stage directions utility model and user mobile phone and host computer can be formed the earth leakage protective monitor network.The sketch map that Fig. 3 provides is made up of five leakage comprehensive protectors, a user mobile phone and a host computer, and the number of networked devices can also increase as required in the practical application.Among Fig. 3, every leakage comprehensive protector all is a network node, and wherein node 1 is a control centre, and internodal communication modes can be wired mode, also can be wireless mode, and single-chip microcomputer will be selected appropriate communication mode automatically.Control centre controls the operation of whole network, but same time inner control center is unique; Control centre is responsible for collecting the real-time running data and the fault message of each network node institute protection circuit; While is the operating state of Control Network node also; Control centre can also utilize mobile communication network and user mobile phone or upper machine communication; The user can check or revise the parameter setting of any node in the network through mobile phone or host computer, and can carry out long-range breaking-closing operating to it through mobile phone or host computer.
Shown in Fig. 4 a; Zero sequence current mutual inductor RCT (1) passes A, B, C phase line and the neutral line N of power circuit; Comprise two secondary that constitute respectively by two coils; One of them secondary is connected to signal conditioning circuit (6), and another secondary and button S1 and resistance R 1 constitute the electric leakage simulation circuit (11) takes place.
Shown in Fig. 4 a, A, B, C phase line that A phase load current transformer (2) CT1, B phase load current transformer (3) CT2 and C phase load current transformer (4) CT3 pass power circuit respectively, their output is connected with signal conditioning circuit (6).
Shown in Fig. 4 a, voltage divider (5) is made up of R2, R4, R5, R7, R8 and R9, and the input of voltage divider (5) is connected to A, B, C three-phase voltage, and output is connected with signal conditioning circuit (6).
Shown in Fig. 4 a, in the signal conditioning circuit (6): (a) leakage current signal conditioning.R26, C15 are connected with the output of zero sequence current mutual inductor RCT (1), and leakage current signal is transformed to voltage signal; Operational amplifier U6A, C14, R23, R24, R30 and R32 constitute the electric leakage signal amplifying circuit, and the signal after the amplification is imported single-chip microcomputer (7) through R35.(b) load current signal condition.The load current signal conditioning circuit is made up of three identical circuit of structure: the output signal of A phase load current transformer (2) CT1 meets the R40 of signal conditioning circuit (6); A phase load current signal is transformed to voltage signal; Be input to the rectification circuit that D14, R39, R41 and C16 constitute after the amplifying circuit amplification via operational amplifier U3B, R34, R37, D12 and D13 formation, signal is rectified into direct current after R38 is input to single-chip microcomputer (7).The output signal of B phase load current transformer (3) CT2 meets the R46 of signal conditioning circuit (6); B phase load current signal is transformed to voltage signal; Be input to the rectification circuit that D17, R45, R48 and C20 constitute after the amplifying circuit amplification via operational amplifier U4C, R42, R43, D15 and D16 formation, signal is rectified into direct current after R44 is input to single-chip microcomputer (7).The output signal of C phase load current transformer (3) CT3 meets the R52 of signal conditioning circuit (6); C phase load current signal is transformed to voltage signal; Be input to the rectification circuit that D20, R51, R53 and C26 constitute after the amplifying circuit amplification via operational amplifier U4D, R49, R50, D18 and D19 formation, signal is rectified into direct current after R47 is input to single-chip microcomputer (7).(c) line voltage signal conditioning.The line voltage signal modulate circuit is made up of three identical circuit of structure: the R2 of voltage divider (5), R4 sensing A phase voltage; Its output signal is connected to the rectification circuit that D5, C10 and R6 constitute, and the direct current signal after the rectification is imported single-chip microcomputer (7) through R3 behind the voltage follower that operational amplifier U3A constitutes.The R5 of voltage divider (5), R7 sensing B phase voltage, its output signal are connected to the rectification circuit that D6, C12 and R12 constitute, and the direct current signal after the rectification is imported single-chip microcomputer (7) through R11 behind the voltage follower that operational amplifier U4A constitutes.The R8 of voltage divider (5), R9 sensing C phase voltage, its output signal are connected to the rectification circuit that D7, C13 and R17 constitute, and the direct current signal after the rectification is imported single-chip microcomputer (7) through R16 behind the voltage follower that operational amplifier U4B constitutes.
Shown in Fig. 4 a; Switching device (8) receives the control of single-chip microcomputer (7) through R18, Q1 and relay K 1; Single-chip microcomputer (7) delay adjustments sends the order of threading off after the time when leakage current, load current or line voltage distribution meet or exceed the action threshold value; Make switching device (8) action, switching device (8) disengagement failure circuit.Wherein, the power circuit that D3, D4 and C11 constitute is the trip gear power supply, even to guarantee still can to accomplish the action of threading off at the condition lower device of line outage.
Shown in Fig. 4 a, another secondary of zero sequence current mutual inductor RCT (1) and button S1 and resistance R 1 constitute the electric leakage simulation circuit (11) take place, when pressing S1; Zero sequence current mutual inductor RCT (1) will produce the electric leakage signal of a simulation, after single-chip microcomputer (7) detects this signal, will send the earth leakage protective instruction; It is single-chip microcomputer (7) output high level; Whether drive relay K 1 through R18, Q1, make switching device (8) action, it is normal to be used for check protection device earth leakage protective performance.
Shown in Fig. 4 a; The signal after single-chip microcomputer U11 (7) acknowledge(ment) signal modulate circuit (6) in the utility model amplifies and the signal of frequency detection circuit (15), control button/display circuit (12), real time clock circuit (13), external memory storage (14) and switching device (8).Single-chip microcomputer U11 (7) analyzes sampled value and judges, its process and method are:
(a) when leakage current meets or exceeds the residual operating current threshold value, single-chip microcomputer (7) delay adjustments sends the order of threading off after the time, makes switching device (8) action, and switching device (8) disengagement failure circuit is protected the fault electric leakage.
(b) when the load current in the circuit met or exceeded overcurrent protection action threshold value, single-chip microcomputer (7) delay adjustments sent the order of threading off after the time, made switching device (8) action, and switching device (8) disengagement failure circuit is protected overload current.
(c) when line voltage distribution was higher than overvoltage protection action threshold value or be lower than under-voltage protection action threshold value, single-chip microcomputer (7) delay adjustments sent the order of threading off after the time, made switching device (8) action, and switching device (8) disengagement failure circuit is protected electric voltage exception.
Shown in Fig. 4 a, button/display circuit (12) is made up of U2, C5, C6, C7, C8, C9, DS1～DS25, S2～S7, S11, S12, R13, R14, R15, R19, R27, is connected with single-chip microcomputer (7) and receives single-chip microcomputer (7) control.Display circuit (12) circulation shows leakage current, load current and line voltage distribution, and shows that earth leakage protective, overcurrent protection and electric voltage exception protect specified operating value, operate time and cause the reason and the fault value of action.Keyboard (12) is used to select specified operating value, operate time and query history record.
Shown in Fig. 4 a, real time clock circuit (13) is made up of U12, C18, C19, Y1, BT1 and C17, is connected with single-chip microcomputer (7) and receives single-chip microcomputer (7) control.Real time clock circuit (13) provides real-time time for intelligent leakage comprehensive protector, is used for failure logging and history run record, makes the user understand the running status of circuit in more detail.
Shown in Fig. 4 a, external memory storage U13 (14) is connected with single-chip microcomputer (7) and controlled by single-chip microcomputer (7).Leakage current, load current and line voltage distribution and fault message when external memory storage is used for regularly storing the circuit operation make things convenient for user inquiring.
Shown in Fig. 4 a; Frequency detection circuit (15) is made up of R29, D10, D11, U8A, and the mains frequency signal is shaped to square wave after R31 is input to single-chip microcomputer (7), and single-chip microcomputer U11 (7) adopts timer internal that power supply signal is carried out timing measuring; When mains frequency changes; The timer value of single-chip microcomputer (7) also just changes, realize to mains frequency from motion tracking, the data that make single-chip microcomputer (7) when carrying out signals collecting, gather in the cycle are constant; Reduce the error of data processing, improved certainty of measurement.
Shown in Fig. 4 a; Power circuit (10) is made up of transformer T1, diode D1, D2, integrated regulator U1 and C1, C2, C3, C4; The voltage of T1 output outputs to U1 and carries out voltage stabilizing after diode D1, D2 rectification, C1, C2, C3, C4 carry out filtering to power supply.Power circuit (10) is single-chip microcomputer and other circuit supplies.
Shown in Fig. 4 b, communication module (9) is made up of integrated circuit 1 (U15), integrated circuit 2 (U7), photoelectrical coupler (U5, U9, U10), integration module (U14), SIM slot (U16), R20, R21, R22, R25, R28, R33, R36, R54～R62, C27～C36, L2, L3, Y3, antenna RF ANT, D21, Q2 and Q3.Wherein: integrated circuit 1 (U15), R54, C27, C30, C31, C33, C34, C35, Y3 and antenna RF ANT constitute the wireless communication line of communication module (9); Integrated circuit 2 (U7), photoelectrical coupler (U5, U9, U10), R20, R21, R22, R25, R33, R36, R28 and Q2 constitute the wire communication circuit of communication module (9); Integration module (U14), SIM slot (U16), R55～R62, C28, C29, C36, Q3 and D21 constitute the communicating circuit based on mobile communication network of communication module (9).Communication module (9) is connected with single-chip microcomputer (7) through Connection Block P1; Under the control of single-chip microcomputer (7), realize communication function: many intelligent leakage comprehensive protectors interconnect composition earth leakage protective monitor network through communication module (9) separately; This connected mode can be the connection that the Connection Block P2 through communication module (9) carries out with wired mode, also can be the connection of carrying out with wireless mode through the wireless communication line of communication module (9).Every leakage comprehensive protector all is a network node, and any one network node can both control the operation of whole network as the control centre of network, but same time inner control center is unique; Control centre is responsible for collecting the real-time running data and the fault message of each network node institute protection circuit; While is the operating state of Control Network node also; Control centre is through setting up communication based on the communicating circuit of national public's wireless network (GSM, CDMA/CDMA2000, WCDMA, TDSCDMA) and user mobile phone or host computer; Inform the running status of user network node; The user also can check or revise the parameter setting of arbitrary node in the network through mobile phone or host computer, and can carry out long-range breaking-closing operating to it through mobile phone or host computer.
Fig. 5 a shows the operation sequence of chip microcontroller defencive function in the utility model:
(1) after single-chip microcomputer powers on, register and variable are carried out initialization, changeed for (2) step after initialization is accomplished;
(2) according to sample frequency and window period leakage current, A phase load electric current, B phase load electric current, C phase load electric current and line voltage signal are gathered; After accomplishing the sampling of one-period, calculate the value of leakage current, three-phase load electric current and line voltage distribution, changed for (3) step after calculating finishes over to;
(3) according to the size of the firm leakage current that detects, judge that leakage current value whether more than or equal to electric leakage action threshold value, when leakage current moves threshold value more than or equal to electric leakage, changes delay procedure over to, delay adjustments sends the instruction of threading off after the time; , leakage current changed for (4) step when moving threshold value less than electric leakage over to;
(4) size of the firm three-phase load electric current that detects of basis; Judge that whether each phase load current value is more than or equal to overcurrent action threshold value; When a certain phase or a few phase load electric current during more than or equal to overcurrent action threshold value, change delay procedure over to, delay adjustments sends the instruction of threading off after the time; , the three-phase load electric current changed for (5) step when all moving threshold value less than overcurrent over to;
(5) according to the size of the line voltage distribution that has just detected, whether judge each phase voltage value more than or equal to overvoltage action threshold value, when a certain phase or a few phase voltage during, change delay procedure over to more than or equal to overvoltage action threshold value, delay adjustments sends the instruction of threading off after the time; , three-phase voltage changed for (6) step when all moving threshold value less than overvoltage over to;
(6) according to the size of the line voltage distribution that has just detected, judge whether each phase voltage value is less than or equal to the low-voltage threshold value, when a certain phase or a few phase voltage are less than or equal to the low-voltage threshold value, change delay procedure over to, delay adjustments sends the instruction of threading off after the time; When three-phase voltage changed for (7) step during all greater than the low-voltage threshold value over to;
(7) single-chip microcomputer is waited for the triggering signal that next periodic sampling begins, in case this triggering signal arrives, the sampling routine that single-chip microcomputer promptly changes step (2) over to carries out next periodic sampling;
Fig. 5 b shows the operation sequence of chip microcontroller communication sending function in the utility model:
(1) under the condition that circuit does not break down, single-chip microcomputer periodically detects the state that sends flag bit, when detecting transmission mark position 1, changes for (2) step over to;
(2) single-chip microcomputer is written into the destination address of communication and the data content of transmission, changes for (3) step over to;
(3) single-chip microcomputer is selected communication modes automatically according to connection status: judge at first whether the communication destination address is user mobile phone, if the communication target is user mobile phone then selects based on the communication modes of public's wireless network (GSM, CDMA/CDMA2000, WCDMA, TDSCDMA) and changed for (4) step over to; Whether if the communication target is not a user mobile phone, it is available then to detect wire communication mode, if available, then select wire communication mode and changes for (4) step over to; Whether if wire communication mode is unavailable, it is available to detect wireless communication mode again, if available, then select wireless communication mode and changes for (4) step over to; If wireless communication mode is still unavailable, then there is fault to the user report communication line;
(4) adopt the communication modes of selecting that communication data is sent to destination address, after the data transmission finishes, changed for (1) step over to.
Fig. 5 c shows the operation sequence of chip microcontroller communication receiving function in the utility model:
(1) under the condition that circuit does not break down, single-chip microcomputer periodically detects the state of receiving flag position, when detecting receiving flag position 1, changes for (2) step over to;
Whether (2) single-chip microcomputer scans successively has Data Receiving under the various communication modes: at first scan based on whether Data Receiving is arranged under the communication modes of public's wireless network, if Data Receiving is arranged, then changed for (3) step over to; Whether if do not have Data Receiving under the communication modes based on public's wireless network, then scanning has Data Receiving under the wire communication mode, if Data Receiving is arranged, then changes for (3) step over to; Whether if do not have Data Receiving under the wire communication mode, then scanning has Data Receiving under the wireless communication mode, if under the wireless communication mode Data Receiving is arranged, then changes for (3) step over to; Do not go on foot if still have Data Receiving under the wireless communication mode then change (1) over to;
(3) receive communication data packets, after the packet reception finishes, judge whether address is this machine address, if then changed for (4) step over to; If address is not this machine address, then abandons the communication data that receives and changed for (1) step over to;
(4) packet of accepting is handled, after disposing, changed over to (1) step.
The utility model is not addressed part and is applicable to prior art.
The above only is two embodiment that propose according to the utility model technical scheme, is not that the utility model is done any pro forma restriction.All the utility model technical scheme contents that do not break away from, all still belong in the claim scope of the utility model simple modification, equivalent variations and modification that above embodiment did according to the technical spirit of the utility model.
Claims (5)
1. leakage comprehensive protector; It is characterized by, comprise zero sequence current mutual inductor, A phase load current transformer, B phase load current transformer, C phase load current transformer, voltage divider, signal conditioning circuit, single-chip microcomputer, switching device, communication module and power supply; Wherein, the output of zero sequence current mutual inductor, A phase load current transformer, B phase load current transformer, C phase load current transformer and voltage divider is connected with signal conditioning circuit, and the output of signal conditioning circuit links to each other with single-chip microcomputer; Switching device is connected with single-chip microcomputer; Communication module is connected with single-chip microcomputer; The input of power supply is connected with electrical network, and the output of power supply is connected with signal conditioning circuit, single-chip microcomputer and communication module;
Described switching device is air circuit or relay.
2. leakage comprehensive protector according to claim 1; It is characterized by; Described signal conditioning circuit is made up of leakage current signal modulate circuit, voltage signal modulate circuit and load current signal conditioning circuit three partial function circuit, and wherein, the leakage current signal modulate circuit is made up of operational amplifier, resistor, capacitor, diode; The input of leakage current signal modulate circuit is connected with the output of zero sequence current mutual inductor, and the output of leakage current signal modulate circuit is connected with single-chip microcomputer; The voltage signal modulate circuit partly is made up of three identical in structure; They constitute by operational amplifier, resistor, capacitor and diode; Be used to handle three-phase voltage signal by the voltage divider input; The input of voltage signal modulate circuit is connected with the output of voltage divider, and the output of voltage signal modulate circuit is connected with single-chip microcomputer; The load current signal conditioning circuit partly is made up of three identical in structure; They constitute by operational amplifier, resistor, capacitor and diode; Be used to handle three-phase load current signal by the input of load current instrument transformer; The input of load current signal conditioning circuit is connected with the output of A phase load current transformer, B phase load current transformer, C phase load current transformer respectively, and the output of load current signal conditioning circuit is connected with single-chip microcomputer.
3. leakage comprehensive protector according to claim 1; It is characterized by; Described communication module is formed by wireless communication line, wire communication circuit with based on the communicating circuit three partial function circuit of mobile communication network; Wherein, wireless communication line is the modular circuit based on the wireless telecommunications integrated circuit; The wire communication circuit is the modular circuit based on field bus technique; Communicating circuit based on mobile communication network is the data transmission module that utilizes mobile communication network.
4. leakage comprehensive protector according to claim 1 is characterized by, and described mobile communication network is GSM mobile communication network, CDMA/CDMA2000 mobile communication network, WCDMA mobile communication network or TDSCDMA mobile communication network.
5. leakage comprehensive protector according to claim 1 is characterized by, and also comprises following auxiliary part: electric leakage simulative generator, keyboard/display circuit, real time clock circuit, external memory storage and frequency detection circuit; These auxiliary parts all are connected with single-chip microcomputer with power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202301823U CN202178564U (en) | 2011-07-01 | 2011-07-01 | Electric leakage comprehensive protector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011202301823U CN202178564U (en) | 2011-07-01 | 2011-07-01 | Electric leakage comprehensive protector |
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| CN202178564U true CN202178564U (en) | 2012-03-28 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255278A (en) * | 2011-07-01 | 2011-11-23 | 河北工业大学 | Comprehensive leakage protector |
| CN105591358A (en) * | 2014-10-23 | 2016-05-18 | 国网山东昌邑市供电公司 | Current-limiting residual current circuit breaker |
| CN105720555A (en) * | 2014-12-18 | 2016-06-29 | 国家电网公司 | Intelligent type electric leakage protection method for rural power grid power distribution terminal |
| CN109254223A (en) * | 2018-11-07 | 2019-01-22 | 深圳市众祥安全科技有限公司 | Leak electricity short-circuit detection method, open circuit protection equipment, monitoring center, system |
| CN109410451A (en) * | 2018-11-06 | 2019-03-01 | 国网安徽省电力有限公司芜湖县供电公司 | Agricultural production is swiped the card power device and its control method |
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2011
- 2011-07-01 CN CN2011202301823U patent/CN202178564U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255278A (en) * | 2011-07-01 | 2011-11-23 | 河北工业大学 | Comprehensive leakage protector |
| CN102255278B (en) * | 2011-07-01 | 2014-04-16 | 河北工业大学 | Comprehensive leakage protector |
| CN105591358A (en) * | 2014-10-23 | 2016-05-18 | 国网山东昌邑市供电公司 | Current-limiting residual current circuit breaker |
| CN105591358B (en) * | 2014-10-23 | 2018-12-18 | 国网山东省电力公司昌邑市供电公司 | A kind of current limliting leakage circuit breakers |
| CN105720555A (en) * | 2014-12-18 | 2016-06-29 | 国家电网公司 | Intelligent type electric leakage protection method for rural power grid power distribution terminal |
| CN109410451A (en) * | 2018-11-06 | 2019-03-01 | 国网安徽省电力有限公司芜湖县供电公司 | Agricultural production is swiped the card power device and its control method |
| CN109254223A (en) * | 2018-11-07 | 2019-01-22 | 深圳市众祥安全科技有限公司 | Leak electricity short-circuit detection method, open circuit protection equipment, monitoring center, system |
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