CN102830255A

CN102830255A - Smart electricity meter with function of monitoring and protecting power failure

Info

Publication number: CN102830255A
Application number: CN2012103017363A
Authority: CN
Inventors: 王金泽
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-08-23
Filing date: 2012-08-23
Publication date: 2012-12-19
Anticipated expiration: 2032-08-23
Also published as: CN102830255B

Abstract

A smart electricity meter with a function of monitoring and protecting power failure comprises a metering chip, a leakage current sampling circuit, a phase current sampling circuit, a phase voltage sampling circuit, a CPU (central processing unit), a power module and a low voltage breaker. The leakage current sampling circuit is electrically connected with the metering chip which is mutually electrically connected with the CPU. The CPU is electrically connected with the low voltage breaker through a trip output port. The low voltage breaker is electrically connected with the CPU through a status acquisition interface. The invention further provides a power failure monitoring and controlling method of the smart electricity meter. The smart electricity meter has the advantages that the reliable power module for power failure protection and control is provided, various types of power failure warning and protection are provided, failure warning and failure protection for voltage, current, power and the like are achieved for power users, failure spots are prevented and isolated, economic loss and personal safety accidents due to failure of electric circuit equipment of the users are prevented and reduced, and reliability of low voltage grids is effectively improved.

Description

A kind of intelligent electric energy meter with electricity consumption malfunction monitoring defencive function

Technical field

The present invention relates to low voltage electric network power measurement protection apparatus field, relate in particular to a kind of intelligent electric energy meter with electricity consumption malfunction monitoring defencive function.

Background technology

According to the definition of State Grid Corporation of China's intelligence table, intelligent electric energy meter is made up of measuring unit, data processing unit, communication unit etc., has the electric energy meter of functions such as electrical energy metering, information stores and processing, monitoring in real time, control automatically, information interaction.Therefore, existing intelligent electric energy meter does not possess electricity consumption malfunction monitoring and defencive function.

Intelligent low-pressure device for switching art equipment had been obtained very much progress in recent years; Occurred like intelligent switch electrical equipment such as intelligent low-pressure comprehensive protection device, intelligent electricity leakage protector, intelligent breakers; Its major function is low-voltage circuit control and protection; The protection type that relates generally to has overvoltage, under-voltage, decompression, overcurrent, short circuit, electric leakage (residual current) etc., and some intelligent switch electrical equipment also have communication function, can realize the remote monitoring of device for switching ruuning situation.But these intelligent switch electrical equipment also exist some shortcomings, as: be difficult to realize realize interactive with higher level's electrical network smart machine and system; Need to set up independently communication and supervisory system, build the maintenance cost height.Therefore, in power consumer, also there is big difficulty by large scale application intelligent switch electrical equipment.

In addition, the raising that requires along with power supply reliability owing to power autonomously in recent years constantly increase with the dual power supply user, causes sending electric incident to be on the increase from user side to low voltage electric network is counter, and low voltage electric network maintenance personal's personal safety in serious threat.According to the data of retrieval, at present domestic also do not have can be to preventing specially at low voltage electric network from the anti-protectiveness intelligent switch equipment that send electricity of user side.

State Grid Corporation of China proposes during " 12 ", to accelerate to build strong intelligent grid, and the main characteristic of strong intelligent grid is " informationization, robotization, interactive ".The gordian technique that need relate at low-voltage distribution, with electrical domain mainly contains intelligent power two-way interaction technology, Self-Service technology by all kinds of means, client's intelligent fault administrative skill, safety on line multiplexe electric technology etc.

Low voltage electric network is the weakest link of technology and equipment that intelligent grid is built, and the technology and equipment in existing low voltage electric network field all is difficult to satisfy the demand of intelligent grid at present.Be embodied in; Intelligent electric energy meter still is confined to electric energy metrical, charging and relevant information interaction function; The intelligent low-pressure device for switching still is confined to electric monitoring and electric protection aspect function, does not also have a kind of intelligent terminal that has intelligent electric energy meter and intelligent switch electrical equipment two aspect functions simultaneously.

Intelligent electric energy meter is mounted in a kind of intelligent terminal between low voltage electric network and the power consumer line facility property right circle point, is " nerve ending " of " intelligent grid " mesolow electrical network part.With the intelligent electric energy meter is carrier, expands intelligent electric energy meter in the function aspect electrical measurement, protection control, malfunction monitoring analysis, power information interaction, and power supply enterprise and power consumer are all had very strong practical value.Therefore; Invent a kind of intelligent electric energy meter with electricity consumption malfunction monitoring defencive function; As the intelligent terminal equipment that integrates functions such as metering and billing, switch, measurement, protection control, on-line monitoring, communication, electricity consumption interaction, with greatly promoting the intelligent grid construction in the development aspect low-voltage distribution, the electricity consumption.

Summary of the invention

The technical matters that the present invention will solve is: the deficiency that overcomes prior art; A kind of intelligent electric energy meter with electricity consumption malfunction monitoring and defencive function is provided; Include functions such as electricity consumption working condition measuring, fault analysis, fault isolation protection, fault remote monitoring, power information interaction in the intelligent electric energy meter envelop of function; Make intelligent electric energy meter have protection of electricity consumption malfunction monitoring and warning function; Can analyze the isolated fault point as required automatically; With a shared cover network channel and an equipment of power information acquisition system, compatible power information acquisition system communication protocol, power information acquisition system main website can realize the long-range electricity consumption failure monitoring management to power consumer for the terminal management carrier with the intelligent electric energy meter.Through improving, can also improve the anti-stealing electricity function and the generation that prevents the dangerous electricity consumption behavior of part of intelligent electric energy meter.

The monitoring of intelligent electric energy meter according to the invention and protection to as if the electric wiring and the equipment of electric energy meter downside, monitoring and protection type comprise: overvoltage, under-voltage, decompression, overcurrent, short circuit, electric leakage (residual current), the anti-type emergency protection such as electricity of sending.

The technical scheme that the present invention adopted is: a kind of intelligent electric energy meter with electricity consumption malfunction monitoring defencive function; Comprise computation chip, leakage current sample circuit, phase current sampling circuit, phase voltage sample circuit, central processor CPU; Low-voltage circuit breaker, said leakage current sample circuit electrically connects said computation chip, and said computation chip and central processor CPU electrically connect each other; Said central processor CPU electrically connects said low-voltage circuit breaker through a tripping operation output interface; Said low-voltage circuit breaker electrically connects said central processor CPU through a state acquisition interface, it is characterized in that, also comprises power module.Power module comprises circuit components such as voltage stabilizing, rectification, charging and battery.

Preferably, said power module comprises rechargeable battery.

Preferably, also comprise communication interface, communication module, long-range main website, said communication interface is electrically connected with said central processor CPU, communication module respectively each other, adopts data communication protocol to carry out communication each other between said long-range main website and the communication module.

Preferably; Also comprise communication interface, communication module, concentrator, long-range main website; Said communication interface is electrically connected with said central processor CPU, communication module respectively each other, adopts data communication protocol to carry out communication each other between said long-range main website and concentrator, said concentrator and the communication module respectively.

Preferably, said low-voltage circuit breaker comprises shunt release and auxiliary contact, and said tripping operation output interface electrically connects shunt release, and said auxiliary contact electrically connects the state acquisition interface.

Preferably, also comprise protection control switch and tripping relay, said protection control switch and tripping relay are serially connected on the control output loop of output interface.

Further, also comprise keyboard, display screen, audible-visual annunciator, said keyboard electrically connects described central processor CPU, and said central processor CPU electrically connects said display screen, audible-visual annunciator respectively.

Further, said display screen is used to show electric weight, the electricity charge, power, table meter fault and overcurrent, short circuit, overvoltage, under-voltage, decompression, electric leakage, the counter protection dependent event information of sending electric fault

Further, said audible-visual annunciator is used to point out electric energy meter operating condition, communications status, electric energy meter ERST, relevant emergency protection information.

Further, said data communication protocol carries out function and expands on the communication protocol of " power consumer power information acquisition system " and technical manual, and the agreement after the expansion realizes backward compatible acquisition system and equipment, common user communication passage.

Further, said intelligent electric energy meter and long-range main station system or remote administration terminal are carried out two-way communication through data communication protocol, and accept the management of long-range main station system or remote administration terminal.

Further, said central processor CPU electrically connects with a clock module respectively each other, electrically connects each other with a data-carrier store.

A kind of electricity consumption malfunction monitoring and control method with intelligent electric energy meter of electricity consumption malfunction monitoring defencive function also is provided, may further comprise the steps,

Step 1: one or more composite signals in the leakage current signal that the ac current signal that the said phase current sampling circuit in the intelligent electric energy meter is gathered, the ac voltage signal that said phase voltage sample circuit is gathered and said leakage current sample circuit are gathered convert digital signal into; Import said computation chip into and carry out data processing, and deposit in the working storage;

Step 2: store various protection setting valves or warning setting valve in the said data-carrier store in advance by long-range main website or the input of intelligent electric energy meter button; Said central processor CPU constantly reads or receives the data from computation chip; And compare with corresponding protection setting valve or warning setting valve, judge that intelligent electric energy meter connects the residing duty of user load lateral circuit;

Step 3: in the data value that reads or receive is in the setting valve scope of normal operating conditions; Then do not start corresponding failure protection and warning subroutine; Said central processor CPU carries out analytic statistics with data, forms statisticss such as interior mean value of unit interval, maximal value, minimum value, and on display screen; And regularly related data is uploaded, is forwarded to long-range main website through concentrator; Or directly uploading to long-range main website, step 2 is returned in data storage and analysis so that long-range main website leaks electricity again; When exceeding or be lower than the setting valve scope, then start corresponding failure protection and warning subroutine, carry out further fault judgement; According to comprehensive judged result, central processor CPU sends the protection trip command and gives said low-voltage circuit breaker, the shunt release action open-circuit line in the said low-voltage circuit breaker, or send alarm command and give audible-visual annunciator, report to the police;

Step 4: by said central processor CPU will report to the police, the implementation status of emergency protection trip event and emergency protection or warning forms the event of failure message that has timestamp; Write entry data memory; And show that on display said intelligent electric energy meter is uploaded dependent failure event message and data in real time, be forwarded to long-range main website through concentrator; Or directly uploading to long-range main website, long-range main website carries out data storage and analysis.

Preferably; Said central processor CPU compares the overvoltage that prestores in current ac voltage signal data of being gathered and the said data-carrier store, under-voltage, decompression setting valve; When phase voltage value>during the overvoltage setting valve, then satisfy overvoltage fault verification entry condition; When phase voltage value <under-voltage setting valve and current magnitude of voltage>decompression setting valve, then satisfy under-voltage fault verification entry condition; When phase voltage value < during the decompression setting valve, then satisfies no-voltage fault and judges entry condition; When magnitude of voltage numerical value meets above-mentioned scope; Protection of intelligent electric energy meter trigger voltage class and warning subroutine; Carry out further fault judgement, comprehensively judge according to data such as voltage swing, fluctuation situation, out-of-limit duration, low-voltage circuit breaker divide-shut brake location statuss.

Preferably, said central processor CPU compares the overcurrent, the short circuit setting valve that prestore in current ac current signal data of being gathered and the said data-carrier store, when phase current values>during the over-current adjusting value, then satisfy over current fault and judge entry condition; When phase current values>during the short circuit setting valve, then satisfy short trouble and judge entry condition; When current value numerical value meets above-mentioned scope; Intelligent electric energy meter starting current class protection subroutine and warning subroutine; Carry out further fault judgement, comprehensively judge according to data such as phase current size, fluctuation situation, out-of-limit duration, low-voltage circuit breaker divide-shut brake location statuss.

Preferably; Said central processor CPU compares the current active power that has a direction symbol of being gathered or current data and null value, the anti-electric protection power setting valve that send; When meritorious performance number < 0 and active power absolute value>is anti-when sending electric protection power setting valve; Or when phase current values < 0 and phase current absolute value>is anti-when sending the electric protection current setting; Intelligent electric energy meter starts anti-electricity type emergency protection and the warning subroutine sent, and carries out further fault judgement, comprehensively judges according to data such as reverse active power or size of current, fluctuation situation, reverse out-of-limit duration, low-voltage circuit breaker divide-shut brake location statuss.

Compared with prior art; The invention has the beneficial effects as follows: 1, power module is provided; For low-voltage circuit breaker provides reliable and stable protection action control power supply, improve the reliable rate and protection action accuracy of whole device, and reduce the failure rate of low-voltage circuit breaker trip operation mechanism; For the intelligent electric energy meter nucleus module provides the operation back-up source, operational modes such as the standby of support intelligent electric energy meter nucleus module, dormancy provide condition for resuming operation fast after the intelligent electric energy meter power down, have improved the practicality of failure protection function; 2, polytype electricity consumption fault alarm and protection are provided; Electricity consumption emergency protection type comprises overvoltage, under-voltage, decompression, overcurrent, short circuit, electric leakage (residual current), instead send type protection such as electricity; Electricity consumption fault alarm and defencive function through intelligent electric energy meter; Can realize fault alarm and emergency protection to types such as power consumer voltage, electric current, power; Prevention is monitored the electric leakage situation of electric wiring and equipment in real time with electric fault and automatic isolated fault point, reduces the electric energy loss and the economic loss that cause because of electric leakage; Prevent and reduce the economic loss that causes because of the electric wiring equipment failure and the generation of personal safety accident, and effectively improve the reliability of low voltage electric network; 3, polytype electricity consumption failure message prompting is provided; Intelligent electric energy meter can show relevant failure message and electricity consumption information on its display screen; Maintain easily personnel and user and understand reason intuitively, accurately and timely fix a breakdown and hidden danger, and can accurately distinguish the power failure failure cause and cause still to be to cause by power supply enterprise by power consumer with electric fault; For power supply enterprise and electric power electricity consumption fault analysis provide foundation, improve power supply reliability and breakdown repair efficient.The back-up source that intelligent electric energy meter is built-in with power module and is supplied power by rechargeable battery; Can in a period of time of intelligent electric energy meter outage back, continue failure condition is pointed out, can manual work when intelligent electric energy meter changes standby mode over to wake up and carry out data query; 4, the electricity consumption fault management can be included telemanagement in, especially can insert power consumer power information acquisition system and manage.Power supply enterprise includes the electricity consumption fault management in range of management; Can analyze low voltage electric network and user power utilization fault pests occurrence rule; Early warning in time with take measures to investigate fault and hidden danger, improve the intelligent level of low voltage electric network and electricity consumption, effectively instruct power consumer science, safety, efficiently electricity consumption; 5, compatible existing power consumer power information acquisition system and equipment.The present invention carries out function and expands on the communication protocol of " power consumer power information acquisition system " and technical manual, but its great advantage is exactly can backward compatible acquisition system and equipment common user communication passage; 6, has the current acquisition element of gathering neutral line current or gathering phase line, neutral line current simultaneously through having increased; Can more effectively monitor the electricity filching behavior that adopts current return shunting or short circuit method; Improve the function of opposing electricity-stealing of intelligent electric energy meter; And prevent the generation of dangerous electricity consumption behavior, reduce power supply enterprise because of measuring economic loss unusual and that stealing causes.

Description of drawings

Fig. 1 is the circuit structure block diagram of the present invention according to the mode one of the object division of nucleus module exchanges data;

Fig. 2 is the circuit structure block diagram of the present invention according to the mode two of the object division of nucleus module exchanges data;

Fig. 3 is an electricity consumption emergency protection primary control program synoptic diagram;

Fig. 4 is the circuit structure diagram of the present invention according to the mode one of alternating-current electric signals collecting sensor element type division;

Fig. 5 is the circuit structure diagram of the present invention according to the mode two of alternating-current electric signals collecting sensor element type division;

Fig. 6 is the circuit structure diagram of the present invention according to the mode three of alternating-current electric signals collecting sensor element type division;

Fig. 7 is the built-in synoptic diagram of low-voltage circuit breaker of the present invention;

Fig. 8 is a low-voltage circuit breaker external synoptic diagram of the present invention;

Description of reference numerals: 1, computation chip; 2, leakage current sample circuit; 3, phase current sampling circuit; 4, phase voltage sample circuit; 5, tripping operation output interface; 6, state acquisition interface; 7, low-voltage circuit breaker; 8, communication interface; 9, communication module; 10, data-carrier store; 11, clock module; 12, central processor CPU; 13, audible-visual annunciator; 14, display screen; 15, keyboard; 16, long-range main website; 17, concentrator; 18, power module.

Embodiment

Do further detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.

Like Fig. 1, shown in Figure 2; A kind of intelligent electric energy meter with electricity consumption malfunction monitoring and defencive function; Comprise computation chip 1, phase current sampling circuit 3, phase voltage sample circuit 4, central processor CPU 12, leakage current sample circuit 2, low-voltage circuit breaker 7 and power module 18.Said leakage current sample circuit 2 electrically connects said computation chip 1; Said computation chip 1 electrically connects with central processor CPU 12 each other; Said central processor CPU 12 electrically connects said low-voltage circuit breaker 7 through a tripping operation output interface 5, and said low-voltage circuit breaker 7 electrically connects said central processor CPU 12 through a state acquisition interface 6.Said leakage current sample circuit 2 comprises the leakage current pick-up transducers.

Also comprise communication interface 8, communication module 9, keyboard 15, display screen 14, audible-visual annunciator 13; Said communication interface 8 is electrically connected with said central processor CPU 12, communication module 9 respectively each other; Said keyboard 15 inserts described central processor CPU 12, and said central processor CPU 12 electrically connects said display screen 14, audible-visual annunciator 13 respectively.A said central processor CPU 12 and a clock module 11 electrically connect each other.A said central processor CPU 12 and a data-carrier store 10 electrically connect each other.

It is digital signal that the leakage current sample circuit is responsible for the low pressure leakage current is exchanged analog signal conversion, and imports the leakage current digital signal into computation chip and carry out data processing.Most important element is the leakage current pick-up transducers in the leakage current sample circuit; The leakage current pick-up transducers is the interchange analog signal conversion element of leakage current; The line electrical leakage current signal concerned to convert into by a certain percentage be suitable for the AC signal that the leakage current sample circuit is handled; The leakage current sample circuit will leak electricity again, and to exchange analog signal conversion be to output to computation chip after the digital signal, carries out the leakage current digital signal processing by computation chip.The leakage current pick-up transducers can adopt leakage current signals such as current transformer or shunt resistance to gather sensing element.Phase current sampling circuit, phase voltage sample circuit exchange the digital signal that simulating signal converts suitable computation chip collection respectively into phase current, the phase voltage of three-phase or single-phase low-voltage circuit; And import voltage, current digital signal into computation chip and carry out data processing, form measurement data such as electric current, voltage, electric power, electric weight.Voltage, current sampling circuit comprise sensor element, are generally voltage, current transformer or dividing potential drop, shunt resistance element.Computation chip is a kind of digital signal processing (Digital Singnal Processing that electric signals such as electric energy metrical and voltage, electric current are handled that is specifically designed to; Be called for short DSP) chip; Among the present invention; Computation chip not only is responsible for converting phase current, phase voltage digital signal into power and electric weight through calculation process, also is responsible for converting phase voltage, phase current, leakage current digital signal into effective value through calculation process, and related data is stored in the working storage of computation chip.CPU is the core parts of intelligent electric energy meter; The general embedded microprocessor that adopts; Be that intelligent electric energy meter is realized protection parameter tuning, protection judgement and sent the protection Intelligent treatment core parts of instruction, and tasks such as responsible data parameters storage administration, peripheral hardware control and Control on Communication.Data-carrier store also is used for stored electricity data (phase voltage, phase current, leakage current etc.), parameter and event information except that being used for data such as storage of electrical energy metering, charging and table meter incident.The tripping operation output interface is used for to low-voltage circuit breaker output tripping operation control wave or level signal, realizes the tripping operation control to low-voltage circuit breaker.The tripping operation output interface comprises a tripping relay, is used to control the output of trip signal.The tripping operation output interface also comprises protection control switch, and on the control output loop of protection control switch serial connection tripping operation output interface, whether the emergency protection trip avoidance function that is used to set intelligent electric energy meter comes into operation.The state acquisition interface is responsible for gathering the divide-shut brake location status amount of low-voltage circuit breaker.Communication interface and communication module are responsible for communicating by letter of intelligent electric energy meter and intelligent terminals such as concentrator, long-range main website, on-the-spot portable data acquisition PDA.Clock is a timing device, and from charged pool, is used for the independent timing of intelligent electric energy meter, and guarantees intelligent electric energy meter still accurately timing when outage, to guarantee the accuracy of failure message time of origin record.Keyboard button, display, acousto-optic are designated as the input-output apparatus of the man-machine interaction of intelligent electric energy meter, are responsible for defencive function debugging of electricity consumption malfunction monitoring and fault alarm, failure message demonstration.Power module is the circuit module that has voltage stabilizing, rectification and charge function, and the normal operation that is responsible for intelligent electric energy meter itself provides stable power, and can be the low-voltage control power supply that low-voltage circuit breaker is controlled provides safe and reliable.Power module comprises one group of rechargeable battery power supply in support, can support intelligent electric energy meter to keep operation a period of time later in dead electricity, carries out data processing, data storage, data communication, display message and sends operation such as alerting signal; And consume situation according to battery power, change standby, dormant state automatically over to, so that resume operation fast during the intelligent electric energy meter telegram in reply.Low-voltage circuit breaker is a kind of low-voltage circuit breaker that has shunt release and auxiliary contact.The effect of shunt release is a kind of contents of realizing low-voltage circuit breaker is carried out sub-switching operation as intelligent electric energy meter, when intelligent electric energy meter tripping operation control interface output sub-gate signal, just connects the shunt opening trip coil power supply, handles the low-voltage circuit breaker separating brake.Auxiliary contact is a kind of contents that low-voltage circuit breaker is used for auxiliary judgment divide-shut brake position, and the divide-shut brake position state signal to intelligent electric energy meter feedback low-voltage circuit breaker is responsible in the moving contact interlock of it and low-voltage circuit breaker.Low-voltage circuit breaker is the electrical control equipment that is used to cut off and recover user load, and the shunt opening trip coil of low-voltage circuit breaker, auxiliary contact are connected with tripping operation output interface, the state acquisition interface of intelligent electric energy meter respectively.Among the present invention, low-voltage circuit breaker is responsible for when breaking down open failure point or fault power consumer as required, and can break off low-voltage circuit breaker or prevent that according to the parameter that long-range main website issues low-voltage circuit breaker from being closed a floodgate by illegal according to the instruction of long-range main website.Can select the low-voltage circuit breaker that has electric switch-on operating mechanism external accessory for use; And increase the combined floodgate output interface in the intelligent electric energy meter core; Expand through function; Can realize the function of intelligent electric energy meter, and realize that long-range main website is to low-voltage circuit breaker remote control closing function under the intelligent electric energy meter the low-voltage circuit breaker automatic reclosing.Concentrator is meant the data of collecting each acquisition terminal or electric energy meter; And handle storage; Ability and power information collection main website or handheld device are carried out the equipment of exchanges data simultaneously; Among the present invention, concentrator also is responsible for the storage and the forwarding of intelligent electric energy meter failure protection function related data, parameter, incident.Long-range main website refers to power information acquisition system main website, is responsible for intelligent electric energy meter is carried out data acquisition and management, and telemanagement is carried out in service data, controlled variable and the protection control also be responsible for intelligent electric energy meter.

The present invention also provides a kind of electricity consumption malfunction monitoring and control method with intelligent electric energy meter of electricity consumption malfunction monitoring defencive function, may further comprise the steps,

(1) one or more composite signals in the leakage current signal gathered of the ac current signal gathered of the said phase current sampling circuit in the intelligent electric energy meter, ac voltage signal that said phase voltage sample circuit is gathered and said leakage current sample circuit convert digital signal into; Import said computation chip into and carry out data processing, and deposit in the working storage;

(2) store various protection setting valves or the warning setting valve of importing by long-range main website or intelligent electric energy meter button in the said data-carrier store in advance; Said central processor CPU constantly reads or receives the data from computation chip; And compare with corresponding protection setting valve or warning setting valve, judge that intelligent electric energy meter connects the residing duty of user load lateral circuit;

(3) in the data value that reads or receive is in the setting valve scope of normal operating conditions; Then do not start corresponding failure protection and warning subroutine; Said central processor CPU carries out analytic statistics with data, forms statisticss such as interior mean value of unit interval, maximal value, minimum value, and on display screen; And regularly related data is uploaded, is forwarded to long-range main website through concentrator; Or directly uploading to long-range main website, step (2) is returned in data storage and analysis so that long-range main website leaks electricity again; When exceeding or be lower than the setting valve scope, then start corresponding failure protection and warning subroutine, carry out further fault judgement; According to comprehensive judged result, central processor CPU sends the protection trip command and gives said low-voltage circuit breaker, the shunt release action open-circuit line in the said low-voltage circuit breaker, or send alarm command and give audible-visual annunciator, report to the police;

(4) by said central processor CPU will report to the police, the implementation status of emergency protection trip event and emergency protection or warning forms the event of failure message that has timestamp; Write entry data memory; And show that on display said intelligent electric energy meter is uploaded dependent failure event message and data in real time, be forwarded to long-range main website through concentrator; Or directly uploading to long-range main website, long-range main website carries out data storage and analysis.

Its emergency protection principle of work and process are following:

The monitoring of intelligent electric energy meter and protection to as if the electric wiring and the equipment of electric energy meter downside, monitoring and protection content comprise: overvoltage, under-voltage, decompression, overcurrent, short circuit, electric leakage (residual current), the anti-type emergency protection such as electricity of sending.

For realizing all kinds of electricity consumption emergency protections, in the embedded type CPU core working procedure of intelligent electric energy meter, each emergency protection and warning subroutine are all benefited from the control of electric fault protection primary control program.For guaranteeing the real-time of malfunction monitoring protection, embedded type CPU and operating system thereof should be selected the operating system of supporting real-time multi-task for use.

Electricity consumption emergency protection primary control program is as shown in Figure 3, after intelligent electric energy meter powers up startup, loads electricity consumption emergency protection primary control program immediately and carries out electricity consumption failure monitoring and protection.Electricity consumption emergency protection primary control program reads from one group of current phase voltage of computation chip, phase current, leakage current numerical value, and phase voltage, phase current, leakage current numerical value are compared with corresponding setting valve respectively.If phase voltage, phase current, leakage current numerical value are out-of-limit; Perhaps there is the anti-electrical anomaly signal that send, checks then whether corresponding protection subroutine process is in operation, if corresponding protection subroutine is moved; Then directly turn back to the next item down data decision node; If corresponding protection subroutine off-duty then starts corresponding protection subroutine process and further judges, and turns back to the next item down data decision node.After each data item had all relatively been accomplished with setting valve, flow process turned back to and reads one group of new current phase voltage, phase current, leakage current numerical value node, and carries out cycle criterion by above-mentioned flow process.Because intelligent electric energy meter adopts real-time multi-task operating system; Therefore intelligent electric energy meter is supported multinomial fault type parallel detection simultaneously protection; Operating system is created the corresponding failure process according to different fault-signal types temporarily; Start corresponding protection subroutine, after accomplishing emergency protection action back or fault-signal disappearance, operating system stops automatically and discharges this process.

Intelligent electric energy meter adopt to support the advantage of the operating system of real-time multi-task to be: just can realize that by a cpu chip voltage, electric current, electric leakage, the anti-a plurality of electric faults such as electricity of sending protect types to move simultaneously; Can guarantee that emergency protection is judged and protection action real-time, and can realize the united and coordinating scheduling of dissimilar protection subprogram activations.

Existing is its emergency protection principle of work and process of example explanation with earth leakage protection:

Touch when intelligent electric energy meter connects the user load lateral circuit, when leaking electricity; The inner zero sequence current mutual inductor of intelligent electric energy meter just generates leakage current; The secondary circuit of zero sequence current mutual inductor is input to A/D converter after treatment with leakage current signal and carries out the collection of leakage current analog signal digital; With the leakage current analog signal conversion is digital signal, and incites somebody to action and import the leakage current digital signal into computation chip and carry out data processing.The leakage current data that computation chip transmits the leakage current sample circuit are handled the back through mathematical operation and are formed data such as leakage current effective value, average data, and with data storage in the working storage of computation chip.CPU constantly reads or receives the leakage current data from computation chip; And real-time leakage current data and earth leakage protection setting valve or warning setting valve compared; If leakage current value is greater than earth leakage protection setting valve or warning setting valve; Then start earth leakage protection and warning subroutine, when satisfying earth leakage protection tripping operation trigger condition, CPU exports tripping operation control wave or level signal through the tripping operation output interface to low-voltage circuit breaker; Connect the shunt opening trip coil power supply of low-voltage circuit breaker, realize the earth leakage protection tripping operation; When satisfying the leakage-current alarm trigger condition, CPU connects sound and light alarm equipment and carries out leakage-current alarm to sound and light alarm equipment output control signal.Described earth leakage protection setting valve or warning setting valve are earth leakage protection and the alarm parameters by long-range main website or the input of intelligent electric energy meter button; Parameter type comprises parameters such as earth leakage protection setting valve, leakage-current alarm setting valve, earth leakage protection tripping operation delay time, earth leakage protection tripping operation allow/forbid, leakage-current alarm allows/forbids, correlation parameter all is stored in the data-carrier store of intelligent electric energy meter.

Earth leakage protection and warning subroutine are one section computer program codes that intelligent electric energy meter leaks electricity and judges and send protection tripping operation/alarm command; Its principle is that various factors such as the size, fluctuation situation, duration according to leakage current carries out from motion tracking and intelligent decision, whether sends earth leakage protection tripping operation or leakage-current alarm instruction according to judged result and predetermined strategy decision.

Leakage-current alarm, earth leakage protection trip event that the power consumer that intelligent electric energy meter is monitored takes place because of electric leakage; And the implementation status condition of earth leakage protection or leakage-current alarm; Form the event message that has timestamp by CPU; Event message is write entry data memory, and dependent event information is shown on LCD.After leakage-current alarm, earth leakage protection trip event took place, intelligent electric energy meter was also uploaded dependent event message and data in real time, be forwarded to long-range main website through concentrator, or directly uploads to long-range main website.

If intelligent electric energy meter connects the load-side leakage current value in normal range; The CPU of intelligent electric energy meter also constantly reads current leakage current value from data-carrier store and carries out analytic statistics; Form statisticss such as interior leakage current mean value of unit interval, maximal value, minimum value; And on LCDs, show related data as required; And regularly related data is uploaded, is forwarded to long-range main website through concentrator, or directly upload to long-range main website, data storage and analysis so that long-range main website leaks electricity.

The overvoltage of intelligent electric energy meter, under-voltage, decompression, overcurrent, short circuit, counter other type protection principle of work such as electricity of sending are consistent with earth leakage protective principle process with process; Its difference is service data, controlled variable, event information type difference, and is different with the warning subroutine with performed correspondence protection.

Overvoltage, under-voltage, no-voltage fault protection principle of work and process are following:

The voltage signal that intelligent electric energy meter is gathered through the phase voltage sample circuit, the voltage data after the computation chip computing is not only as the data source of electric weight, power calculation, also as voltage class malfunction monitoring and protection judgment basis such as overvoltage, under-voltage, decompressions.Similar with the earth leakage protection principle; The CPU of intelligent electric energy meter with the current voltage data of being gathered be stored in overvoltage in the data-carrier store in advance, under-voltage, decompression setting valve compares; When current magnitude of voltage>during the overvoltage setting valve, then satisfy overvoltage fault verification entry condition; When current phase voltage value <under-voltage setting valve and current magnitude of voltage>decompression setting valve, then satisfy under-voltage fault verification entry condition; When current phase voltage value < during the decompression setting valve, then satisfies no-voltage fault and judges entry condition.If current magnitude of voltage numerical value meets above-mentioned scope; Then show and to have voltage class fault; Intelligent electric energy meter trigger voltage protection subroutine is carried out further fault judgement; Comprehensively judge according to data such as voltage swing, fluctuation situation, out-of-limit duration, low-voltage circuit breaker divide-shut brake location statuss, when meeting the fault alarm condition, output alarm information then; When meeting the emergency protection operation condition, then export trip command to the tripping operation control interface, control low-voltage circuit breaker disconnect user circuit.Voltage class failure message also shows on the display at intelligent electric energy meter after judging, and real-time report is to long-range main website.

Overcurrent, short trouble protection principle of work and process are following:

The current data that intelligent electric energy meter is gathered through the phase current sampling circuit, the current data after the computation chip computing is not only as the data source of electric weight, power calculation, also as current capacity malfunction monitoring and protection judgment basis such as overcurrent, short circuits.Similar with the earth leakage protection principle; The CPU of intelligent electric energy meter compares the current current data of being gathered and the overcurrent, the short circuit setting valve that are stored in the data-carrier store in advance; When current phase current values>during the over-current adjusting value, then satisfy over current fault and judge entry condition; When current phase current values>during the short circuit setting valve, then satisfy short trouble and judge entry condition.If current current value numerical value meets above-mentioned scope; Then show and to have the current capacity fault; Intelligent electric energy meter starting current protection subroutine is carried out further fault judgement; Comprehensively judge according to data such as phase current size, fluctuation situation, out-of-limit duration, low-voltage circuit breaker divide-shut brake location statuss, when meeting the fault alarm condition, output alarm information then; When meeting the emergency protection operation condition, then export trip command to the tripping operation control interface, control low-voltage circuit breaker disconnect user circuit.The current capacity failure message also shows on the display at intelligent electric energy meter after judging, and real-time report is to long-range main website.

Anti-electric fault protection principle of work and the process sent is following:

Instead send electricity to refer to power supply oppositely to send the phenomenon of electricity through improper approach, in low voltage electric network, counter to send the principal mode of electricity be that the low-voltage power user side is provided generating power supply or double-cricuit supply oppositely send phenomenon from electricity to low voltage electric network for oneself.Its harm is when the low-voltage distribution network interruption maintenance, and the anti-sending electrode of electric power electricity consumption is prone to cause the line facility maintainer to suffer electric shock to cause human casualty accident.

The anti-electric fault protection philosophy that send of intelligent electric energy meter according to the invention is: when intelligent electric energy meter detects phase line active power or the current reversal of the intelligent electric energy meter of flowing through; Break off low-voltage circuit breaker immediately, break off electric power and connect with the electric of low voltage electric network with electric line or equipment.According to the electric energy four-quadrant diagram, when applied power dropped on I or IV quadrant, the power delivery direction was for to be supplied power to power consumer by low voltage electric network, and its active power and direction of current are forward, belonged to normally sending electricity condition; When applied power dropped on II or III quadrant, the power delivery direction was that its active power and direction of current are oppositely, belong to the anti-electricity condition that send by the power supply of power consumer side direction low voltage electric network side.

The anti-electric fault protection course of work and other emergency protection process sent is similar; The CPU of intelligent electric energy meter compares the current active power that has a direction symbol of being gathered or current data and null value; When current active power value < 0 and current active power absolute value>is anti-when sending electric protection power setting valve; Perhaps when current phase current values < 0 and current phase current absolute value>is anti-when sending the electric protection current setting; Then possibly have the anti-electric situation of sending, intelligent electric energy meter starts the anti-electric fault protection subroutine of sending and carries out further fault judgement, comprehensively judges according to data such as reverse active power or size of current, fluctuation situation, reverse out-of-limit duration, low-voltage circuit breaker divide-shut brake location statuss; When meeting the fault alarm condition, output alarm information then; When meeting the emergency protection operation condition, then export trip command to the tripping operation control interface, control low-voltage circuit breaker disconnect user circuit.The anti-electric fault information of sending also shows on the display of intelligent electric energy meter, and real-time report is to long-range main website.

The present invention is according to the electric data of intelligent electric energy meter computation chip collection and the processing of related data; Can also expand the failure protection function that other type, as: go out phase sequence emergency protection (preventing the reversing of power consumer three phase electric machine) according to three-phase voltage phasing degree order is extendible; Go out the out-of-limit emergency protection of power (preventing power consumer electricity consumption overload) according to the multiplying of voltage and electric current is extendible.

Intelligent electric energy meter of the present invention; Keeping on original power information remote data transfer function basis; Through data communication protocol and related software are carried out the expansion improvement of malfunction monitoring protection correlation function; Need not to increase private communication, main website hardware device, adopt shared communication medium, communication facilities and main website mode, just can realize the remote monitoring and the adjustment of user power utilization emergency protection ruuning situation.

Intelligent electric energy meter electricity consumption malfunction monitoring protection correlation function data communication protocol expands, and refers at intelligent electric energy meter and concentrator, concentrator and power information and gathers the data communication protocol expansion between the main website.Wherein, Communication protocol between intelligent electric energy meter and the concentrator is that the basis is expanded with DL/T645-2007 " multifunctional electric energy meter communication protocol ", and communication protocol is that the basis is expanded with Q/GDW 376.1-2009 " power consumer power information acquisition system communication protocol: main website and acquisition terminal communication protocol " between concentrator and the power information acquisition system main website.

Following with electric fault Remote monitoring and control method:

Telecommunication protocol to intelligent electric energy meter expands.With the leak current fault protection is example, increases data item such as real-time leakage current, leakage current freezing data, leakage current curve data; Increase zero sequence current mutual inductor multiplying power (as measurement point basic parameter item); Leakage current thresholding (as earth leakage protection tripping operation action current setting valve); The leakage current upper limit (as leakage current off-limit alarm current setting); Leakage current is got over the thresholding duration (earth leakage protection tripping operation delay time); Leakage current is got over the upper limit duration (leakage-current alarm delay time); Leakage current is got over the thresholding coefficient of restitution; Leakage current is got over measurement point limit value parameters and protection parameter such as upper limit coefficient of restitution; Increase earth leakage protection controlled variable such as the earth leakage protection tripping operation allows/forbids, leakage-current alarm allows/forbids; Increase incident projects such as earth leakage protection trip event, electric leakage off-limit alarm incident.Voltage class emergency protection and current capacity emergency protections such as overcurrent, short circuit such as overvoltage, under-voltage, decompression, and instead send the electric fault protection, the extending method of its communication protocol is similar with the earth leakage protection type, no longer carefully states one by one.For realizing the compatibility of main website and intelligent electric energy meter function, the concentrator that is connected with intelligent electric energy meter, the communication protocol of main website also communicate agreement as stated above and expand.

The adjustment of malfunction monitoring protection correlation parameter issues.Through the electric leakage of main website, overvoltage, under-voltage, decompression, overcurrent, short circuit, the anti-parameter management software functions such as electricity of sending are improved.With earth leakage protection is example, increases zero sequence current mutual inductor multiplying power, leakage current thresholding, the leakage current upper limit, leakage current thresholding duration, leakage current upper limit duration, leakage current thresholding coefficient of restitution, leakage current correlation parameter management functions of leaking electricity such as upper limit coefficient of restitution, earth leakage protection tripping operation allow/forbid more, the off-limit alarm of leak electricity allows/forbids more more more.Accomplish the setting of correlation parameter in main website after; Correlation parameter is formed message under concentrator is transmitted, pass to intelligent electric energy meter in batches or one by one; Intelligent electric energy meter is verified, is resolved the parameter message that receives, and the parameter that main website is issued is stored in the data-carrier store.Voltage class emergency protections such as overvoltage, under-voltage, decompression, current capacity emergency protections such as overcurrent, short circuit, and counter to send electric fault to protect isoparametric adjustment to issue also similar with the Parameters of Earth-Leakage Protection delivery method, no longer carefully states one by one.

The remote monitoring of intelligent electric energy meter ruuning situation and emergency protection.The intelligent electric energy meter timing automatic uploads to main website with the data message mode through concentrator with real time data, freezing data, the curve data of types such as the leakage current that collects, phase voltage, phase current; Main website verifies the data message that receives, resolve; And data are write database, carry out data exhibiting and demonstration by main website.Intelligent electric energy meter detects with after automatic corresponding protection of startup and warning subroutine are handled behind the electric fault; And formation emergency protection trip event or electric protection numerical value off-limit alarm event message; Relevant event information is uploaded to main website through concentrator automatically with the event message mode, further handle by main website.Main station monitoring personnel inquire about the current of intelligent electric energy meter or historical failure monitoring and protecting relevant information if desired; Can send failure message from main website and call the survey order together; Intelligent electric energy meter passes to main website with relevant information with message after receiving and calling the survey order together immediately automatically in form.

Electricity consumption situation and error information displaying method are following:

Under normal electricity consumption situation, the display screen of intelligent electric energy meter can turn over the data such as information that screen shows that current voltage, electric current, leakage current, power, electric weight, the electricity charge, time, main website issue automatically; When taking place to use electric fault, the display screen of intelligent electric energy meter can show information such as electricity consumption fault type, failure cause, fault-time; When the generation electric network fault causes the intelligent electric energy meter dead electricity; Rely on the support of built-in back-up source; The display screen of intelligent electric energy meter still can provide the power information of a period of time to show; For repairing personnel and user provide the coherent reference information of power-off event, the failure judgement type and the source of failure exactly.When back-up source be depleted to a certain degree or the certain hour that cuts off the power supply after, intelligent electric energy meter changes the low power consumpting state of standby automatically over to, closes all peripheral hardwares and peripheral circuit power supply, only gives the internal memory power supply of intelligent electric energy meter core.When under power down mode, needing the inquiry intelligent electric energy meter for information about, can wake intelligent electric energy meter up by the manually-operated keyboard button and carry out information inquiry.Behind intelligent electric energy meter telegram in reply, can experience operating system and guide start-up course again, can return to normal operating condition rapidly, guarantee the accuracy of measuring, guarantee that each item failure protection function in time puts into operation.

The present invention presses the difference of the connected mode of intelligent electric energy meter nucleus module exchanges data, and two kinds of embodiments are arranged:

Mode one: as shown in Figure 1, the communication interface 8 of nucleus module is electrically connected with central processor CPU 12, communication module 9 respectively each other, adopts data communication protocol to carry out communication each other between long-range main website 16 and the communication module 9.

Mode two: as shown in Figure 2, also comprise concentrator 17, adopt data communication protocol to carry out communication each other between the communication module 9 of long-range main website 16 and concentrator 17, concentrator 17 and nucleus module respectively.Concentrator 17 is collected the data of each acquisition terminal or electric energy meter, and stores, and can realize the exchanges data that electric energy meter and power information are gathered main website or hand-held intelligent terminal equipment simultaneously.

It is different with the type of combination that the present invention presses the element selection of alternating-current electric signals collecting sensor in leakage current sample circuit, phase current sampling circuit, the phase voltage sample circuit, and three kinds of embodiments are arranged:

Mode one: as shown in Figure 4, adopt mutual inductor type acquisition elements, zero sequence current mutual inductor L1 gathers leakage current, and current transformer L2 gathers the phase line current, and voltage transformer (VT) L3 gathers phase voltage.

Mode two: as shown in Figure 5, adopt mutual inductor type acquisition elements, current transformer L1 gathers the phase line current, and current transformer L2 gathers neutral line current, and voltage transformer (VT) L3 gathers phase voltage.Leakage current obtains the instantaneous numerical value of leakage current by the instantaneous value of phase line current, neutral line current through computation chip mathematical operation stack.For improving the acquisition precision of leakage current, current transformer L1, L2 should adopt the electrical specification current transformer consistent with parameter.

Mode three: as shown in Figure 6, adopt dividing potential drop, shunt resistance type acquisition elements.Resistance R 1, R2 constitute the shunt resistance circuit jointly, and wherein, the R1 resistance value is less; The R2 resistance value is bigger; The ratio 1:N of R1 and R2 resistance value, wherein N is an integer, resistance R 1 is connected on the phase line; Resistance R 2 outputs to phase line current acquisition terminal with the partial current signal on divided circuit, the current signal that computation chip collected is 1/ (N+1) phase line current doubly.Resistance R 3, R4 constitute the shunt resistance circuit jointly and are used to gather neutral line current, and acquisition method is identical with the phase line acquisition method.Resistance R 5, R6 series connection constitute the divider resistance circuit and are used to gather phase voltage between phase line, zero line; Wherein, the R5 resistance value is bigger, and the R6 resistance value is less; R5 is M:1 with the ratio of R6; Wherein M is an integer, and the voltage signal at R6 two ends outputs to phase voltage and gathers terminal, and the voltage signal that computation chip collected is 1/ (M+1) phase line voltage doubly.Identical with mode two; Leakage current obtains numerical value by the instantaneous value of phase line current, neutral line current through computation chip mathematical operation stack; For improving the acquisition precision of leakage current; Resistance R 1, R3 should adopt the electrical specification resistance consistent with parameter, and resistance R 2, R4 also should adopt the electrical specification resistance consistent with parameter.The mode three described resistance of respectively gathering should adopt precision resistance to be used as exchanging acquisition elements.

What above-mentioned three kinds of modes were given an example is the interchange pick-up transducers element mode of connection under the single-phase situation, and for three-phase four-line system, its mode of connection principle is same as described above, and difference only is to have increased respectively two current acquisition elements and two voltage acquisition elements.

The present invention has two kinds of assembly models by the installation site of topworks's (being low-voltage circuit breaker) of emergency protection action:

Mode one: low-voltage circuit breaker is built-in.As shown in Figure 7, install the low-voltage circuit breaker that has electrical apparatus release and auxiliary contact additional in intelligent electric energy meter inside.The quantity of state acquisition interface input terminal of the auxiliary contact access intelligent electric energy meter nucleus module of isolating switch is used for deciliter position of monitoring breaker, and the shunt opening trip coil of isolating switch inserts the tripping operation output interface terminal of intelligent electric energy meter nucleus module and realizes emergency protection tripping operation control.Whether the tripping operation output interface also comprises protection control switch and tripping relay, and protection control switch and tripping relay serial connection trips on the control output loop of output interface, come into operation at the emergency protection trip avoidance function that is used to set intelligent electric energy meter.

Mode two: low-voltage circuit breaker external.As shown in Figure 8, the low-voltage circuit breaker installation site is moved on to the intelligent electric energy meter outside, intelligent electric energy meter is identical with mode of connection and Fig. 7 between the low-voltage circuit breaker, with electric major loop, control signal loop, state detection signal return wire one by one correspondence be connected.

What mode one, mode two were given an example is the mode of connection of function according to the invention in the different installation sites of protection topworks of single-phase intelligent electric energy meter; For the three-phase intelligent electric energy meter; Its connection principle is constant, but needs to select the three-phase low-voltage circuit breaker as emergency protection topworks.Be conserve space and cost, can select only to cut-off the low-voltage circuit breaker of phase line type, also have identical effect, but under the situation of electric energy meter zero line and phase line wiring error, just do not have earth leakage protective effect.The tripping operation output interface of such scheme all comprises a tripping relay, is used to be switched on or switched off the control power supply of isolating switch shunt opening trip coil, plays the effect of control breaker open operation.The shunt opening trip coil control power supply of isolating switch; Can adopt type control power supplys such as alternating current 220V, direct current 24V; Interchange or the DC power supply that also can after the voltage stabilizing rectification, export through the power module of intelligent electric energy meter both can have been adopted by the direct mode of power supply of electric major loop (being phase line).It is simple in structure that employing directly provides the advantage of control power supply power supply mode by electric major loop; Production results is low; But the control power quality is relatively poor; Emergency protection action accuracy can reduce, and for improving protection action accuracy, the shunt release of wide operating voltage range can be considered to adopt in the type selecting aspect of isolating switch shunt release annex; Employing is that fault protection action accuracy is high by the advantage of the mode of the power module power supply of intelligent electric energy meter, and can reduce the failure rate of isolating switch shunt release annex, improves the reliability of electricity protection.

The advantage of mode one is to install simply; If intelligent electric energy meter and higher level's communication mode are the power carrier modes; Its method and common electric energy meter that inserts electrical network is in full accord, and only need phase line, zero line that low-voltage circuit is passed in and out line inserts respective terminal respectively and can realize said fault remote monitoring defencive function.Its shortcoming is that the low-voltage circuit breaker repair and replacement are inconvenient.The advantage of mode two is that the low-voltage circuit breaker repair and replacement are more convenient.Shortcoming is to install with wiring to show complicated slightly, and control signal wire, state detection signal line all need to receive the low-voltage circuit breaker respective terminal from the intelligent electric energy meter terminal, need to consider to prevent the ruined problem of connecting line.

Although specifically show and introduced the present invention in conjunction with preferred embodiment; But the those skilled in the art should be understood that; In the spirit and scope of the present invention that do not break away from appended claims and limited; In form with on the details the present invention is made various variations, be protection scope of the present invention.

Claims

1. intelligent electric energy meter with electricity consumption malfunction monitoring defencive function; Comprise computation chip, leakage current sample circuit, phase current sampling circuit, phase voltage sample circuit, central processor CPU; Low-voltage circuit breaker, said leakage current sample circuit electrically connects said computation chip, and said computation chip and central processor CPU electrically connect each other; Said central processor CPU electrically connects said low-voltage circuit breaker through a tripping operation output interface; Said low-voltage circuit breaker electrically connects said central processor CPU through a state acquisition interface, it is characterized in that, also comprises power module.

2. a kind of intelligent electric energy meter with electricity consumption malfunction monitoring defencive function according to claim 1 is characterized in that said power module comprises rechargeable battery.

3. a kind of intelligent electric energy meter according to claim 1 with electricity consumption malfunction monitoring defencive function; It is characterized in that; Said low-voltage circuit breaker comprises shunt release and auxiliary contact, and said tripping operation output interface electrically connects shunt release, and said auxiliary contact electrically connects the state acquisition interface; Also comprise protection control switch and tripping relay, said protection control switch and tripping relay are serially connected on the control output loop of output interface.

4. a kind of intelligent electric energy meter according to claim 1 with electricity consumption malfunction monitoring defencive function; It is characterized in that; Also comprise keyboard, display screen, audible-visual annunciator; Said keyboard electrically connects described central processor CPU, and said central processor CPU electrically connects said display screen, audible-visual annunciator respectively; Said display screen is used to show electric weight, the electricity charge, power, table meter fault and overcurrent, short circuit, overvoltage, under-voltage, decompression, electric leakage, the counter protection dependent event information of sending electric fault; Said audible-visual annunciator is used to point out electric energy meter operating condition, communications status, electric energy meter ERST, relevant emergency protection information; Said central processor CPU electrically connects with a clock module respectively each other, electrically connects each other with a data-carrier store.

5. a kind of intelligent electric energy meter according to claim 1 with electricity consumption malfunction monitoring defencive function; It is characterized in that; Said data communication protocol carries out function and expands on the communication protocol of " power consumer power information acquisition system " and technical manual, the agreement after the expansion realizes backward compatible acquisition system and equipment, common user communication passage.

6. a kind of intelligent electric energy meter according to claim 1 with electricity consumption malfunction monitoring defencive function; It is characterized in that; Said intelligent electric energy meter and long-range main station system or remote administration terminal are carried out two-way communication through data communication protocol, and accept the management of long-range main station system or remote administration terminal.

7. an electricity consumption malfunction monitoring and control method with intelligent electric energy meter of electricity consumption malfunction monitoring defencive function is characterized in that: adopt each described intelligent electric energy meter of claim 1-6, may further comprise the steps with electricity consumption malfunction monitoring defencive function,

Step 1: one or more composite signals in the leakage current signal that the ac current signal that the said phase current sampling circuit in the intelligent electric energy meter is gathered, the ac voltage signal that said phase voltage sample circuit is gathered and said leakage current sample circuit are gathered convert digital signal into; Import said computation chip into and carry out data processing, and deposit in the working storage; Step 2: store various protection setting valves or warning setting valve in the said data-carrier store in advance by long-range main website or the input of intelligent electric energy meter button; Said central processor CPU constantly reads or receives the data from computation chip; And compare with corresponding protection setting valve or warning setting valve, judge that intelligent electric energy meter connects the residing duty of user load lateral circuit;

8. a kind of electricity consumption malfunction monitoring and control method according to claim 7 with intelligent electric energy meter of electricity consumption malfunction monitoring defencive function; It is characterized in that; Said central processor CPU compares the overvoltage that prestores in current ac voltage signal data of being gathered and the said data-carrier store, under-voltage, decompression setting valve; When phase voltage value>during the overvoltage setting valve, then satisfy overvoltage fault verification entry condition; When phase voltage value <under-voltage setting valve and current magnitude of voltage>decompression setting valve, then satisfy under-voltage fault verification entry condition; When phase voltage value < during the decompression setting valve, then satisfies no-voltage fault and judges entry condition; When magnitude of voltage numerical value meets above-mentioned scope; Protection of intelligent electric energy meter trigger voltage class and warning subroutine; Carry out further fault judgement, comprehensively judge according to data such as voltage swing, fluctuation situation, out-of-limit duration, low-voltage circuit breaker divide-shut brake location statuss.

9. a kind of electricity consumption malfunction monitoring and control method according to claim 7 with intelligent electric energy meter of electricity consumption malfunction monitoring defencive function; It is characterized in that; Said central processor CPU compares the overcurrent, the short circuit setting valve that prestore in current ac current signal data of being gathered and the said data-carrier store; When phase current values>during the over-current adjusting value, then satisfy over current fault and judge entry condition; When phase current values>during the short circuit setting valve, then satisfy short trouble and judge entry condition; When current value numerical value meets above-mentioned scope; Intelligent electric energy meter starting current class protection subroutine and warning subroutine; Carry out further fault judgement, comprehensively judge according to data such as phase current size, fluctuation situation, out-of-limit duration, low-voltage circuit breaker divide-shut brake location statuss.

10. a kind of electricity consumption malfunction monitoring and control method according to claim 7 with intelligent electric energy meter of electricity consumption malfunction monitoring defencive function; It is characterized in that; Said central processor CPU compares the current active power that has a direction symbol of being gathered or current data and null value, the anti-electric protection power setting valve that send; When meritorious performance number < 0 and active power absolute value>is anti-when sending electric protection power setting valve; Or when phase current values < 0 and phase current absolute value>is anti-when sending the electric protection current setting; Intelligent electric energy meter starts anti-electricity type emergency protection and the warning subroutine sent, and carries out further fault judgement, comprehensively judges according to data such as reverse active power or size of current, fluctuation situation, reverse out-of-limit duration, low-voltage circuit breaker divide-shut brake location statuss.