CN103259276A - Automatic intelligent power distribution system and power distribution method - Google Patents
Automatic intelligent power distribution system and power distribution method Download PDFInfo
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- CN103259276A CN103259276A CN201310218056XA CN201310218056A CN103259276A CN 103259276 A CN103259276 A CN 103259276A CN 201310218056X A CN201310218056X A CN 201310218056XA CN 201310218056 A CN201310218056 A CN 201310218056A CN 103259276 A CN103259276 A CN 103259276A
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
- Y04S40/121—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 the power network as support for the transmission
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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
Abstract
The invention discloses an automatic intelligent power distribution system and a power distribution method. The power distribution system comprises a power distribution executing unit, and the power distribution executing unit receives a power distribution command from a power distribution monitoring terminal and gates a corresponding phase line on a three-phase power transmission line to a single-phase power supply line on an output side of the power distribution executing unit to achieve intelligent power distribution. According to the automatic intelligent power distribution system, low-voltage three-phase disequilibrium distribution on an input side of a single-phase user is achieved through the power distribution executing unit on an input side of an electricity meter of the single-phase user, the power distribution monitoring terminal receives the electrical load information of each single-phase user in a wireless or power line carrier communication mode, and a basis is provided for the equilibrium distribution of single-phase user quantity on each phase line of the three-phase power transmission line on the whole; the power distribution monitoring terminal sends the power distribution command to the power distribution executing unit and the power distribution executing unit enables each single-phase user to be connected to a corresponding power supply phase line in a grouping mode, and therefore equilibrium power distribution is achieved for single-phase users on a low-voltage side.
Description
Technical field
The present invention relates to electric energy metrical and power supply field, especially, relate to a kind of automated intelligent distribution system and distribution method.
Background technology
Continuous improvement along with living standards of the people, a large amount of powerful single-phase household electrical appliance, as: air-conditioning, electric heater, electric cooker, microwave oven, baking box etc. enter average family, when these household electrical appliance bring comfortable, convenient, fast life to people, bring certain influence also for safety, the economical operation of power supply department low-voltage power supply system.With reference to Fig. 1, existing supply network is drawn three road three-phase power lines from the low-pressure side of 10KV/380V/220V distribution transformer through air switch, A.C. contactor, and the A phase of every road three-phase power line, B phase, C phase circuit insert a plurality of single-phase users respectively.Because each user's single-phase power consumption imbalance cause the current amplitude on the three phase line unequal, and single-phase user's power load randomness is very big, causes three-phase load asymmetric.Asymmetric three-phase load causes the power network imbalance of three-phase voltage, and line loss increases, and operational efficiency is low, when serious, even causes that the neutral line blows.Therefore, power distribution network low-pressure area three-phase imbalance governing problem is an important process of various places power department.
At present, the mode that the employing of part rural area is carried out alternate reactive power compensation in the distribution transforming low-pressure side is adjusted the uneven situation of three-phase load, but this mode can only be adjusted the distribution transforming self problem to a certain extent, and can not solve the three-phase load unbalance condition of low-voltage circuit.
Summary of the invention
The object of the invention is to provide a kind of automated intelligent distribution system and distribution method, to solve the unbalanced technical problem of existing low-pressure side three-phase load.
For achieving the above object, the technical solution used in the present invention is as follows
One aspect of the present invention provides a kind of automated intelligent distribution system, comprises monitoring of electric power terminal and a plurality of distribution performance element that is positioned at the Single-phase supply meter input side;
The distribution performance element is used for arbitrary phase circuit of gating three phase line as the output of single phase power supply circuit, and detects voltage, the electric current of single phase power supply circuit, is sent to monitoring of electric power terminal by wireless or power carrier communication mode; And
Reception is from the distribution instruction of monitoring of electric power terminal, and corresponding phase line is to the single phase power supply circuit of distribution performance element outlet side, to realize intelligent power distribution on the gating three phase line.
Further, the distribution performance element comprises for arbitrary phase circuit of gating three phase line as the distribution converting unit of single phase power supply circuit output and for detection of voltage, the electric current of single phase power supply circuit and go upward to the Monitoring Data processing unit of monitoring of electric power terminal with carrier communication or communication.
Further; the three phase line that is positioned at distribution performance element input side is provided with the three-phase electric leakage protection device; the three-phase electric leakage protection device comprises for the three phase current leakage sampling unit of gathering leakage current on the phase line and is used for control for the switch unit of three-phase power line break-make that the output of three phase current leakage sampling unit and the control end of switch unit all communicate to connect with monitoring of electric power terminal.
Further, the three phase line that is positioned at distribution performance element input side is provided with the first leakage tests unit, and the auxiliary contact of the first leakage tests unit connection switching unit are to generate the leakage current test signal under the state that disconnects at three phase line.
Further, the single phase power supply circuit that is positioned at distribution performance element outlet side is provided with for the single-phase leakage current sampling unit of gathering leakage current on the phase line, and output and the monitoring of electric power terminal of single-phase leakage current collecting unit communicate to connect.
Further, also be provided with the second leakage tests unit on the single phase power supply circuit of distribution converting unit outlet side, when the single phase power supply circuit disconnects, to generate the leakage current test signal.
Further, monitoring of electric power terminal connects remote server by GPRS network or VPN network service.
According to a further aspect in the invention, also provide a kind of automated intelligent distribution method, may further comprise the steps:
Gather each single-phase user's load current value;
Calculate all single-phase users' total load current value I t and three-phase average current value Ip, wherein, Ip=It/3;
Each single-phase user is carried out primary distribution, namely the load current value to each single-phase user is divided into three groups by ordering from big to small, preceding two groups of every group of single-phase users' load current value sum is all smaller or equal to three-phase average current value Ip, and the 3rd group of single-phase user's load current value sum is more than or equal to the three-phase average current value;
Load current value to the 3rd group of user is pressed ascending rank order, carries out secondary distribution, to fill up preceding two groups load current value sum and the difference of three-phase average current value Ip, makes each load current value sum of organizing near three-phase average current value Ip;
The final group result that obtains after primary distribution and the secondary distribution is sent to the distribution performance element;
The distribution performance element is connected to three groups of users' single phase power supply circuit respectively on A phase on the three phase line, B phase, the C phase circuit.
Further, each single-phase user's correspondence is assigned address code, during the initialization distribution according to single-phase number of users on the A phase on the average three phase line of each single-phase user's corresponding address sign indicating number, B phase, the C phase circuit.
The primary distribution that each single-phase user is carried out and secondary distribution computing are carried out or are carried out at remote server in local monitoring terminals, and the time interval of carrying out primary distribution and secondary distribution computing on local monitoring terminals or the remote server can artificially arrange or according to the zero-sequence current value automatic setting of three-phase power transmission side.
The present invention has following beneficial effect:
Automated intelligent distribution system of the present invention is by the distribution performance element at the Single-phase supply meter input side, realized the strategy that carries out the unbalanced distribution of low pressure three-phase at single-phase user's input side, and monitoring of electric power terminal receives each single-phase user's power load information by the mode of wireless or power carrier communication, distribute on each phase line of three phase line single-phase number of users to carry out the basis for balanced on the whole, after predefined balanced allocation strategy method is handled, monitoring of electric power terminal sends distribution and instructs to the distribution performance element, the distribution performance element inserts each single-phase user grouping on the corresponding power supply phase line, thereby realizes the purpose of each single-phase user equilibrium distribution electricity consumption of low-pressure side.
Further; automated intelligent distribution system of the present invention; be provided with three-phase electric leakage protection device and the first leakage tests unit by the three phase line at distribution performance element input side, thereby realized leakage current detection and leakage current detection off-state under and the function of automatic recovery of power supply of three phase line under power supply state.
Further, automated intelligent distribution system of the present invention, be provided with single-phase leakage current sampling unit and the second leakage tests unit by the single phase power supply circuit at distribution performance element outlet side, thus realized that the leakage current of each single phase power supply circuit under power supply state detects and off-state under leakage current detection and automatic recovery of power supply function.
Automated intelligent distribution method of the present invention, by gathering each single-phase user's load current value, and calculate all single-phase users' total load current value I t and three-phase average current value Ip, utilize the strategy of secondary distribution distribution, the equilibrium that has realized the single-phase customer charge electric current of each phase line of three phase line distributes, this distribution method can maximize the electric equilibrium of using that guarantees on the three-phase branch road, and allocation algorithm computational accuracy and operation efficiency height, it is asymmetric to maximize the minimizing three-phase load, reduce the low voltage power transmission side line and decrease, improve fail safe, reliability and the power supplying efficiency of power supply.
Except last and described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.With reference to figure, the present invention is further detailed explanation below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the functional-block diagram of prior art supply network;
Fig. 2 is the functional-block diagram of automated intelligent distribution system of the present invention;
Fig. 3 is the circuit theory diagrams of automated intelligent distribution system embodiment one of the present invention;
Fig. 4 is the circuit theory diagrams of automated intelligent distribution system embodiment two of the present invention;
Fig. 5 is the circuit theory diagrams of automated intelligent distribution system embodiment three of the present invention;
Fig. 6 is the circuit theory diagrams that the three phase line of distribution performance element input side of the present invention is provided with three-phase electric leakage protection device and the first leakage tests unit;
Fig. 7 is the circuit theory diagrams that the single phase power supply circuit of distribution performance element outlet side of the present invention is provided with single-phase leakage current sampling unit and the second leakage current test cell; And
Fig. 8 is the flow chart of steps of automated intelligent distribution method of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
The preferred embodiments of the present invention provide a kind of automated intelligent distribution system, are used for the unit user of low-pressure side is distributed electric energy from three phase line.With reference to Fig. 2, the 10KV/380V/220V distribution transformer is converted to high-tension electricity the low tension of household electricity earlier, and the low-pressure side of distribution transformer is divided into multichannel three-phase low voltage power transmission circuit through multichannel air switch and A.C. contactor.Be example with one road three-phase low voltage power transmission circuit, automated intelligent distribution system of the present invention comprises monitoring of electric power terminal 20 and a plurality of distribution performance element 10 that is positioned at the Single-phase supply meter input side, distribution performance element 10 is used for A phase, the B phase of gating three phase line, arbitrary phase circuit of C phase is exported as the single phase power supply circuit, and voltage, the electric current of detection single phase power supply circuit, be sent to monitoring of electric power terminal 20 by wireless or power carrier communication mode; Distribution performance element 10 receives the distribution instruction from monitoring of electric power terminal 20, and corresponding phase line is to the single phase power supply circuit of distribution performance element 10 outlet sides, to realize intelligent power distribution on the gating three phase line.Automated intelligent distribution system of the present invention is by the distribution performance element 10 at the Single-phase supply meter input side, realized the strategy that carries out the unbalanced distribution of low pressure three-phase at single-phase user's input side, and monitoring of electric power terminal 20 receives each single-phase user's power load information by the mode of wireless or power carrier communication, distribute on each phase line of three phase line single-phase number of users to carry out the basis for balanced on the whole, after predefined balanced allocation strategy method is handled, monitoring of electric power terminal 20 sends distribution and instructs to distribution performance element 10, distribution performance element 10 inserts each single-phase user grouping on the corresponding power supply phase line, thereby realizes the purpose of each single-phase user equilibrium distribution electricity consumption of low-pressure side.
Fig. 3 is the circuit theory diagrams of automated intelligent distribution system embodiment one of the present invention.With reference to Fig. 3, each single-phase usefulness is connected on the three-phase and four-line transmission line through a distribution performance element per family.Wherein, the distribution performance element comprises that the distribution converting unit of exporting as the single phase power supply circuit for arbitrary phase circuit of gating three phase line reaches for detection of voltage, the electric current of single phase power supply circuit and the Monitoring Data processing unit of communicating by letter with monitoring of electric power terminal.In the present embodiment, the Monitoring Data processing unit is the carrier data processing unit, and the carrier data processing unit is uploaded to monitoring of electric power terminal to the voltage on the single phase power supply circuit, current sample by the mode of carrier communication.In the present embodiment, monitoring of electric power terminal comprises for receive electric current on the single phase circuit of uploading from the carrier data processing unit through carrier communication mode, the distribution policy processing unit of voltage, the list that the distribution policy processing unit will receive, the phase power load is passed to the high-speed data processing unit, the high-speed data processing unit calculates single-phase users' all on this three phase line power load and distributes, and send distribution through the distribution policy processing unit and instruct to the distribution converting unit that is positioned at single-phase user's input side, the distribution converting unit is instructed according to distribution, on the extremely corresponding three-phase phase line of each single-phase user's gating.Preferably, the high-speed data processing unit also is connected with remote communication interface, memory module, display module, input module and alarm module.Certainly, it will be understood by those skilled in the art that the high-speed data processing unit only loads above-mentioned part of module or whole module.Wherein, remote communication interface is wireless communication module or wire communication module, for example, and GPRS module, carrier communication interface or 485 communication interfaces, by the mode of this communication interface with up/downlink communication, can realize that supply line distributes the purpose of switching Long-distance Control.Input module is input keyboard or touch-screen, carries out human-computer dialogue to make things convenient for the user, ammeter is shown parameters such as time, leakage current threshold values arrange.Alarm module is acousto-optic warning unit, can surpass the caution of reporting to the police under the state of threshold values at leakage current.Memory module is used for parameters such as electric leakage time, leakage current numerical value, electric leakage number of times are carried out record, in order to call when safeguarding in the future, and formulates corresponding maintenance strategy.Preferably, the high-speed data processing unit can be connected with controller switching equipment on-line monitoring instrument by 485 communication interfaces, this controller switching equipment on-line monitoring instrument can send to the data of the high-speed data processing unit mode by radio communication on the PC, carries out bidirectional data exchange.Preferably, the high-speed data processing unit in the present embodiment is single-chip microcomputer.
Fig. 4 is the circuit theory diagrams of automated intelligent distribution system embodiment two of the present invention.With reference to Fig. 4, embodiment two is that with the difference of embodiment one the Monitoring Data processing unit is the wireless data processing unit, and the wireless data processing unit is uploaded to monitoring of electric power terminal to the voltage on the single phase power supply circuit, current sample by the mode of radio communication.
Fig. 5 is the circuit theory diagrams of automated intelligent distribution system embodiment three of the present invention.With reference to Fig. 5, embodiment three is that with the difference of embodiment one three phase line that is positioned at distribution performance element input side is provided with three-phase electric leakage protection device and the first leakage tests unit.Wherein, the three-phase electric leakage protection device comprises for the three phase current leakage sampling unit of gathering leakage current on the phase line and is used for control for the switch unit of three-phase power line break-make that the output of three phase current leakage sampling unit and the control end of switch unit all communicate to connect with monitoring of electric power terminal.The first leakage tests unit connects the auxiliary contact of described switch unit, with generation leakage current test signal under the state that disconnects at three phase line, thereby realizes that the leakage current under the three phase line off-state detects and automatic recovery of power supply.With reference to Fig. 6, in the present embodiment, switch unit is A.C. contactor, the contactor coil of A.C. contactor is connected to the high-speed data processing unit through relay control unit, the normally open contact of A.C. contactor is connected in the three-phase four-wire power circuit of power supply, and the normally closed interlock of A.C. contactor connects the first leakage tests unit.In the present embodiment; the three phase current leakage sampling unit is current transformer; for detection of the leakage current signal on three-phase phase line and the electrical equipment; the leakage current signal of high-speed data processing unit received current mutual inductor sample; and compare with pre-set threshold; electric leakage state with the monitoring three-phase power line; in case leakage current surpasses threshold value; the high-speed data processing unit sends action command to relay control unit; relay control unit will amplify to cut off the power supply of contactor coil from the control signal of high-speed data processing unit; thereby make the normally open contact of A.C. contactor disconnect; thereby interrupted the power supply output of 220V/380V, to reach earth leakage protective effect.At this moment, the normally-closed contact closure of A.C. contactor.In the present embodiment, the first leakage tests unit comprises the pressure unit that is connected in arbitrary normally closed interlock corresponding with A phase, B phase or C phase circuit on the A.C. contactor, in the present embodiment, pressure unit is resistance unit R, certainly, it will be understood by those skilled in the art that this pressure unit also can select step-down transformer for use.The other end of resistance unit R is connected with for three of gating phase line branch road and selects a gating unit, three select a gating unit to constitute leakage detecting circuit through phase line circuit and the electrical equipment ground connection of gating, leakage detecting circuit is provided with the current sampling unit that detects the leakage detecting circuit electric current and the voltage measurement unit that detects voltage on the leakage detecting circuit, and current sampling unit and voltage measurement unit export the data of gathering to the high-speed data processing unit.Owing to the normally closed interlock closure of A.C. contactor, select road and the electrical equipment ground connection of the phase line of a gating unit and gating through resistance unit R, three, form leakage detecting circuit, and generate the leakage tests signal in this leakage detecting circuit.In the present embodiment, three select a gating unit to comprise respectively reaches three corresponding relays of C phase circuit mutually with A phase, B, and the relay coil control end of three relays is connected to data processing unit through relay control unit.The leakage tests signal is generated by one of built-in three relays of program control gating by the high-speed data processing unit, three relays have only one road gating to select a gating circuit to constitute three at one time, detect A phase, B mutually or the leakage current of C phase circuit detection loop thereby form.The high-speed data processing unit switches the power on/off state of corresponding relay coil through relay control unit, controls three respectively and selects a gating unit gating A phase, B to reach C phase circuit mutually.Current sampling unit and voltage detection unit detect the loop to the A phase line in real time, the B phase line detects the electric current in loop and C phase line detection loop, voltage is measured, and the electric current that detection is obtained, magnitude of voltage is exported to the high-speed data processing unit, the high-speed data receiving element receives the A phase line and detects the loop, the B phase line detects the electric current in loop and C phase line detection loop, behind the magnitude of voltage, according to ohm theorem, calculate A respectively and detect the loop mutually, B detects the loop mutually, C detects mutually to go the same way and goes up the resistance of electric leakage, in like manner: by known voltage divided by resistance, calculate leakage current, compare with preset threshold again, if during more than or equal to preset threshold, circuit continues to keep detected state, if the leakage current value of calculating is during less than preset threshold, the high-speed data processing unit just transmits control signal to relay control unit, relay control unit provides coil voltage to A.C. contactor, the normally-closed contact of A.C. contactor disconnects, interrupt the leakage tests signal, the normally opened contact closure of A.C. contactor constitutes current supply circuit again, reached the purpose of automatic recovery of power supply, so go round and begin again, realized that leakage current under the three phase supply state detects and the three-phase power line off-state under leakage current detection and automatic recovery of power supply.
Preferably, the single phase power supply circuit that is positioned at distribution performance element outlet side is provided with for the single-phase leakage current sampling unit of gathering leakage current on the phase line, and output and the monitoring of electric power terminal of single-phase leakage current collecting unit communicate to connect.Also be provided with the second leakage tests unit on the single phase power supply circuit of distribution converting unit outlet side, when the single phase power supply circuit disconnects, to generate the leakage current test signal.With reference to Fig. 7, the relay that is used for gating single phase power supply circuit and three phase line is connected to the high-speed data processing unit through relay control unit, and the normally opened contact of relay connects the second leakage tests unit.In the present embodiment, single-phase leakage current sampling unit is the current transformer that passes zero line and phase line, do not having under the situation of leakage current, and the two-phase current equal and opposite in direction, phase place is opposite, so the leakage current of current transformer collection is zero; In case when circuit and electrical leakage, the part of phase line current constitutes the loop by electric leakage place and ground, the size of two-phase current is no longer equal, and current transformer generates current signal.The high-speed data processing unit receives the current signal from current transformer, and compare with pre-set threshold, electric leakage state with monitoring supply line, in case leakage current surpasses threshold value, the high-speed data processing unit sends action command to relay control unit, and relay control unit will amplify to promote the actuating of relay from the control signal of high-speed data processing unit, allows the normally-closed contact of relay disconnect, interrupted the output of zero line and phase line, to disconnect the power supply of supply line.At this moment, the normally-closed contact of relay disconnects, the normally opened contact closure, and the second leakage tests unit that links to each other with the normally opened contact of relay inserts on the phase line.The second leakage tests unit is included in the pressure unit that inserts when supply line disconnects on the phase line, and the same with the first leakage tests unit, pressure unit herein can be reduction voltage circuits such as resistance unit or step-down transformer.The second leakage tests unit comprises that also current sampling unit and voltage sample unit export the data of gathering to the high-speed data processing unit for detection of the current sampling unit of leakage current on the phase line branch road and for detection of the voltage acquisition unit of voltage on the phase line branch road.When the normally opened contact closure of relay, the leakage tests signal is sent on the phase line, constitute loop of electric leakage by phase line or electrical equipment to ground, the high-speed data processing unit is in real time to the electric current of leakage tests signal, voltage is monitored, by to the leakage tests signal code, the data of voltage monitoring, calculate leak resistance in the circuit according to Ohm's law, in like manner: the voltage that detects according to voltage detection unit is divided by resistance, calculate the leakage current in the circuit, compare with preset threshold again, if during more than or equal to preset threshold, circuit continues to keep detected state, if the leakage current value of calculating is during less than preset threshold, the high-speed data processing unit is just carried control signal to relay control unit, the interruption relay working voltage, allow the normally opened contact of relay separate, interrupt the leakage tests signal, the normally-closed contact closure constitutes current supply circuit again, has reached the purpose of automatic recovery of power supply.Under power supply state, the leakage current that the leakage current sampling unit detects on the current supply circuit also is delivered to the high-speed data processing unit, so repeatedly, realized that the leakage current under the power supply state detects and off-position under leakage current detection and automatic recovery of power supply.
In embodiment three, the high-speed data processing unit also is connected to server through remote communication interface, and server also can connect Terminal Server Client by the Internet.Wherein remote communication interface can pass through GPRS network or VPN network service Connection Service device.
According to a further aspect in the invention, also provide a kind of automated intelligent distribution method, with reference to Fig. 8, specifically may further comprise the steps:
Step S10, gather each single-phase user's load current value, the carrier data unit on each single-phase user or wireless data processing unit are uploaded to monitoring of electric power terminal with detected single-phase user's load current value through the mode of carrier communication or radio communication.
Step S20, the total load current value I t that calculates all single-phase users and three-phase average current value Ip, wherein, Ip=It/3.
Step S30, each single-phase user is carried out primary distribution, namely the load current value to each single-phase user is divided into three groups by ordering from big to small, preceding two groups of load current value sums of respectively organizing single-phase user are all smaller or equal to three-phase average current value Ip, and the 3rd group of single-phase user's load current value sum is more than or equal to the three-phase average current value; Because single-phase user's load current value is pressed rank order from big to small, preferred allocation gives preceding two groups user's load current value sum near three-phase average current value Ip, the remaining current capacity value sum that is included into the 3rd group single-phase user then can surpass three-phase average current value Ip, to solve in distributing the ensuing second time for the uncompensated load electric current that produces in this allocation step, do not send the distribution instruction to the distribution performance element this moment.
Step S40, to the 3rd group of user's load current value by ascending rank order, carry out secondary distribution, to fill up preceding two groups load current value sum and the difference of three-phase average current value Ip, make each load current value sum of organizing near three-phase average current value Ip.
Step S50, the final group result that obtains after primary distribution and the secondary distribution is sent to the distribution performance element; Monitoring of electric power terminal is according to single-phase user's address code, and the mode by power carrier or radio communication is sent to the distribution performance element with the distribution instruction.
Step S60, distribution performance element are connected to three groups of users' single phase power supply circuit respectively on A phase on the three phase line, B phase, the C phase circuit, thereby finish the primary power distribution process.
After finishing the primary power distribution process, set by monitoring of electric power terminal and to carry out the time interval of second distribution, and should can artificially adjust in the time interval or according to the zero-sequence current automatic setting of three-phase power transmission side.
In distribution method of the present invention, each single-phase user's correspondence is assigned address code, during the initialization distribution according to the average distribution of each single-phase user's corresponding address sign indicating number, namely according to each single-phase number of users on single-phase user's corresponding address sign indicating number mean allocation three-phase line.The initial condition of the relay of distribution performance element is also determined by single-phase user's address code.For instance: address code is 1 o'clock, and this single-phase user is fitted on the A phase; Address code is 2 o'clock, and this single-phase user is fitted on the B phase; Address code is 3 o'clock, and this single-phase user is fitted on the C phase; Address code is 4 o'clock, and this single-phase user is fitted on the A phase; Address code is 5 o'clock, and this single-phase user is fitted on the B phase, and address code is 6 o'clock, and this single-phase user is fitted on the C phase, and the rest may be inferred, and in the time of can guaranteeing the distribution initialization like this, the quantity balance of single-phase user on three phase line distributed.
Primary distribution and secondary distribution computing that each single-phase user carries out can be carried out by local monitoring of electric power terminal, when single-phase number of users more, the data operation quantity major issue, the distribution strategy that comprises this primary distribution and secondary distribution computing can preferably carry out at the remote server with the monitoring of electric power terminal telecommunication, can guarantee the operation efficiency of data like this, to improve the response speed that distribution distributes.The time interval of carrying out primary distribution and secondary distribution computing on local monitoring of electric power terminal or the remote server can arrange or according to the zero-sequence current automatic setting of three-phase power transmission side.
Automated intelligent distribution method of the present invention, by gathering each single-phase user's load current value, and calculate all single-phase users' total load current value I t and three-phase average current value Ip, utilize the strategy of secondary distribution distribution, the equilibrium that has realized the single-phase customer charge electric current of each phase line of three phase line distributes, this distribution method can maximize the electric equilibrium of using that guarantees on the three-phase branch road, and allocation algorithm computational accuracy and operation efficiency height, it is asymmetric to maximize the minimizing three-phase load, reduce the low voltage power transmission side line and decrease, improve fail safe, reliability and the power supplying efficiency of power supply.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within guarantor's expansion scope of the present invention.
Claims (10)
1. an automated intelligent distribution system is characterized in that, comprises monitoring of electric power terminal and a plurality of distribution performance element that is positioned at the Single-phase supply meter input side;
Described distribution performance element is used for:
Arbitrary phase circuit in the gating three phase line is exported as the single phase power supply circuit, and voltage signal and the current signal of detection single phase power supply circuit, by wireless or power carrier communication mode described voltage signal and current signal are sent to described monitoring of electric power terminal; And
Reception is from the distribution instruction of described monitoring of electric power terminal, and corresponding phase line is to the single phase power supply circuit of described distribution performance element outlet side, to realize intelligent power distribution on the gating three phase line.
2. automated intelligent distribution system according to claim 1 is characterized in that,
Described distribution performance element comprises:
The distribution converting unit, the arbitrary phase circuit that is used for the gating three phase line is exported as the single phase power supply circuit;
The Monitoring Data processing unit goes upward to described monitoring of electric power terminal for detection of the voltage signal of single phase power supply circuit, current signal and with carrier communication or communication.
3. automated intelligent distribution system according to claim 2 is characterized in that,
The three phase line that is positioned at described distribution performance element input side is provided with the three-phase electric leakage protection device; described three-phase electric leakage protection device comprises for the three phase current leakage sampling unit of gathering leakage current on the phase line and is used for control for the switch unit of three-phase power line break-make that the output of described three phase current leakage sampling unit and the control end of described switch unit all communicate to connect with described monitoring of electric power terminal.
4. automated intelligent distribution system according to claim 3 is characterized in that,
The three phase line that is positioned at described distribution performance element input side is provided with the first leakage tests unit, and the described first leakage tests unit connects the auxiliary contact of described switch unit, to generate the leakage current test signal under the state that disconnects at three phase line.
5. automated intelligent distribution system according to claim 2 is characterized in that,
The single phase power supply circuit that is positioned at described distribution performance element outlet side is provided with for the single-phase leakage current sampling unit of gathering leakage current on the phase line, and the output of described single-phase leakage current collecting unit and described monitoring of electric power terminal communicate to connect.
6. automated intelligent distribution system according to claim 5 is characterized in that,
Also be provided with the second leakage tests unit on the single phase power supply circuit of described distribution converting unit outlet side, when the single phase power supply circuit disconnects, to generate the leakage current test signal.
7. according to each described automated intelligent distribution system of claim 1 to 6, it is characterized in that,
Described monitoring of electric power terminal connects remote server by GPRS network or VPN network service.
8. an automated intelligent distribution method is characterized in that, may further comprise the steps:
Gather each single-phase user's load current value;
Calculate all single-phase users' total load current value I t and three-phase average current value Ip, wherein, Ip=It/3;
Each single-phase user is carried out primary distribution, namely the load current value to each single-phase user is divided into three groups by ordering from big to small, preceding two groups of every group of single-phase users' load current value sum is all smaller or equal to described three-phase average current value Ip, and the 3rd group of single-phase user's load current value sum is more than or equal to described three-phase average current value;
Load current value to the 3rd group of single-phase user is pressed ascending rank order, carry out secondary distribution, to fill up preceding two groups load current value sum and the difference of three-phase average current value Ip, make each load current value sum of organizing near three-phase average current value Ip;
The final group result that obtains after primary distribution and the secondary distribution is sent to the distribution performance element;
The distribution performance element is connected to three groups of users' single phase power supply circuit respectively on A phase on the three phase line, B phase, the C phase circuit.
9. automated intelligent distribution method according to claim 8 is characterized in that,
Each single-phase user's correspondence is assigned address code, during the initialization distribution according to single-phase number of users on the A phase on the average three phase line of each single-phase user's corresponding address sign indicating number, B phase, the C phase circuit.
10. according to Claim 8 or 9 described automated intelligent distribution methods, it is characterized in that, may further comprise the steps:
The primary distribution that each single-phase user is carried out and secondary distribution computing are carried out or are carried out at long-range calculation server in local monitoring terminals, and the time interval of carrying out described primary distribution and secondary distribution computing on described local monitoring terminals or the remote server can artificially arrange or according to the zero-sequence current value automatic setting of three-phase power transmission side.
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