CN206411190U

CN206411190U - The three-phase and four-line electric energy meter system that a kind of load supplying phase line can automatically switch

Info

Publication number: CN206411190U
Application number: CN201720048435.2U
Authority: CN
Inventors: 王君
Original assignee: China Jiliang University
Current assignee: China Jiliang University
Priority date: 2017-01-12
Filing date: 2017-01-12
Publication date: 2017-08-15
Anticipated expiration: 2027-01-12

Abstract

The utility model discloses the three-phase and four-line electric energy meter system that a kind of load supplying phase line can automatically switch.It is related to electric energy meter technical field, the part load being connected in the three-phase and four-line electric energy meter high power phase line can be switched in the three-phase and four-line electric energy meter low-power phase line in time when the unbalanced power for occurring being connected in each phase of three-phase and four-line electric energy meter.Including three-phase and four-line electric energy meter body, three-phase and four-line electric energy meter body includes A phase, B phase, C phase, zero line N and three-phase electric energy metering module, in addition to node J1 and controller and the three-phase equilibrium monitor, voltage sampling circuit, Single-Phase Inverter Source, isolating transformer, No. two voltage sampling circuits and the interface power monitor that are connected respectively with controller；The power input connection of the power output end and isolating transformer of Single-Phase Inverter Source, sampling ends of the node J1 respectively with the power output end of isolating transformer and No. two voltage sampling circuits is connected, and three-phase electric energy metering module is connected with controller.

Description

The three-phase and four-line electric energy meter system that a kind of load supplying phase line can automatically switch

Technical field

The utility model is related to electric energy meter technical field, and in particular to the three-phase that a kind of load supplying phase line can automatically switch Four line electric energy meter systems.

Background technology

With the development of economy and society, the type of electrical equipment is more and more.Because current electric power system is typically all Three-phase power supply system, in three-phase power supply system, if power on three-phase occurs larger asymmetric, just occurs power network Off-center operation, just occur power network shake.

When operation of power networks is in non-equilibrium state, the transformer in power network is at asymmetric operation state, in not right Claiming the transformer of running status can make the zero-sequence current of transformer excessive, and excessive zero-sequence current can make the local part of transformer Temperature increases, if the local Part temperature of transformer increase it is excessive may can burn transformer, so as to cause electric power system Power outage.

When unbalanced power supply is run, if wanting the power network for allowing the power network of off-center operation to be changed into balance movement, at present The method taken is that the part load manual switching in the high power phase line of an a wide range of section is big to another In the low-power phase line of scope section.Because the load that this switching mode switches in moment is more, cause rushing for moment switching Hit that electric current is excessive, excessive dash current can not only burn out switching equipment, due also in load switching at that moment, the load Power supply phase line difference before and after switching can cause the loaded work piece to occur chaotic or even damage.

Because specific load is all used by some particular user, all electricity consumptions of each particular user will use electric energy Table carries out electric energy metrical, therefore, if all loads that can be connected using electric energy meter switch list as the basic phase line that phase line switches Member, then as long as the power entirely in each basic phase line switch unit in power network is in a basic balance then it is ensured that whole The power of power network be also it is in a basic balance, will power network be in balance movement state.

The basic phase line switch unit switched using all loads that electric energy meter is connected as phase line, this not only adds power network The flexibility of phase line switching, due to the load that is connected on an electric energy meter for an a wide range of section much less, this Dash current produced by planting phase line switching also wants considerably less.Therefore, if the electric energy can will be connected in time by electric energy meter Part load in table high power phase line is switched in the electric energy meter low-power phase line, negative which not only adds whole power network The flexibility of switching is carried, the reliability of phase line switching is also increased, substantially increases the stability of operation of power networks.Therefore, design It is a kind of to be realized automatically by high power phase line according to the unbalanced power loaded in each phase line of three-phase and four-line electric energy meter is connected to A part load be switched in low-power phase line, the three-phase four of the power-balance in each phase line of three-phase and four-line electric energy meter is made as far as possible Line electric energy meter system seems very necessary.

Utility model content

The utility model is that do not have phase line handoff functionality to solve existing three-phase and four-line electric energy meter, causes to be connected to It will can not be connected in the three-phase and four-line electric energy meter high power phase line during unbalanced power in each phase of three-phase and four-line electric energy meter The deficiency that part load is switched in the three-phase and four-line electric energy meter low-power phase line is worked as there is provided one kind to be occurred being connected to three-phase four To can be connected in time in the three-phase and four-line electric energy meter high power phase line during unbalanced power in each phase of line electric energy meter one Load is divided to be switched in the three-phase and four-line electric energy meter low-power phase line, easily to carrying out discharge and recharge from the battery pack of electricity consumption power supply module The three-phase and four-line electric energy meter system that a kind of load supplying phase line of control can automatically switch.

To achieve these goals, the utility model uses following technical scheme：

The three-phase and four-line electric energy meter system that a kind of load supplying phase line can automatically switch, including three-phase and four-line electric energy meter sheet Body, three-phase and four-line electric energy meter body includes A phase, B phase, C phase, zero line N and three-phase electric energy metering module, in addition to node J1 and control Device processed and the three-phase equilibrium monitor connected respectively with controller, voltage sampling circuit, a Single-Phase Inverter Source, isolate change Depressor, No. two voltage sampling circuits and interface power monitor.The power output end of Single-Phase Inverter Source and isolating transformer Power input is connected, and node J1 connects with the sampling end of the power output end of isolating transformer and No. two voltage sampling circuits respectively Connect, three-phase electric energy metering module is connected with controller.

Also include the switch Ki that control end is connected with controller, wherein i is positive integer, 1≤i≤42.

Also include node J18, node J14 and node J6, node J18 zero line is connected with A, node J14 live wire End is connected with B, and node J6 zero line is connected with C.Node J18 zero line side, node J14 zero line side and node J6 Zero line side is all connected with zero line N respectively.

Electric energy metrical end, the monitoring side of three-phase equilibrium monitor and a voltage sampling circuit for three-phase electric energy metering module Sampling end be all connected respectively with node J18, node J14 and node J6.

The power input of Single-Phase Inverter Source is connected by switching K40 with node J18, and the power supply of Single-Phase Inverter Source is defeated Enter end to be connected with node J14 by switching K41, the power input of Single-Phase Inverter Source is connected by switching K42 with node J6.

Also include loading interfaces being connected with the monitoring side of the interface power monitor respectively, No. two loads to connect Mouth, No. three loading interfaces, No. four loading interfaces, No. five loading interfaces and No. six loading interfaces.

Also include node J2, node J3, node J4, node J5, node J7, node J8, node J9, node J10, node J11, node J12, node J13, node J15, node J16, node J17 and node J19.

The node J6, switch K13, node J2, switch K14, node J3, switch K15, node J4, switch K16, node J5 and No. six loading interfaces is sequentially connected in series, the node J6, switch K21, node J7, switch K22, node J8, switch K23, node J9, switch K24, node J10 and No. five loading interfaces are sequentially connected in series, the node J14, switch K29, node J11, switch K30, node J12, switch K31, node J13 and No. four loading interfaces are sequentially connected in series, and the node J14, are opened K34, node J15, switch K35, node J16 and No. three loading interfaces is closed to be sequentially connected in series, the node J18, switch K38, Node J17 and No. two loading interfaces are sequentially connected in series, the node J18, switch K39, node J19 and a loading interfaces according to It is secondary to be connected in series.

The node J1, switch K1, node J2, switch K17 and node J19 are sequentially connected in series, the node J1, switch K2, node J7, switch K25 and node J19 are sequentially connected in series, the node J1, switch K3, node J11, switch K32 and section Point J19 is sequentially connected in series, and the node J1, switch K4, node J15, switch K36 and node J19 are sequentially connected in series, described Node J1, switch K5, node J3, switch K18 and node J17 be sequentially connected in series, the node J1, switch K6, node J8, open Close K26 and node J17 to be sequentially connected in series, the node J1, switch K7, node J12, switch K33 and node J17 are sequentially connected in series Connection, the node J1, switch K8, node J16, switch K37 and node J17 are sequentially connected in series, the node J1, switch K9, node J4, switch K19 and node J16 are sequentially connected in series, the node J1, switch K10, node J9, switch K27 and section Point J16 is sequentially connected in series, and the node J1, switch K11, node J5, switch K20 and node J13 are sequentially connected in series, described Node J1, switch K12, node J10, switch K28 and node J13 are sequentially connected in series.

Also include for controller power from electricity consumption power supply module, it is described to include battery from electricity consumption power supply module and connect mould Block, the battery pack that can be connected together in series by several separate cells；Also include from electricity consumption power supply module The charger equal with cell number, switching are switched and current limliting module respectively；Battery connection module includes and cell The equal bulk charging bindiny mechanism of number；Bulk voltage detection chip is respectively equipped with each bulk charging bindiny mechanism；Each fill The power output end of electrical equipment is one-to-one to be connected on a terminals at each switching switch selection end；Turn of each switching switch Moved end is one-to-one to be connected on one end of current limliting module, and the other end of each current limliting module is one-to-one to be connected to battery connection module Bulk charging bindiny mechanism on；Battery connection module is connected on the battery pack, the control end of the battery connection module, every individual The control end of voltage checking chip, the control end of each current limliting module and each switching switch is connected with controller respectively；And Under the control of controller, when not being battery pack charging, battery connection module can be by each separate monomer in battery pack Battery is sequentially connected in series becomes series-connected cell together, when being charged for battery pack, and battery connection module can be by battery pack The series-connected cell being sequentially connected in series together becomes separate cell.

This programme is when in use, it is assumed that in general, and a loading interfaces with No. two loading interfaces are supplied by A phases Electricity, No. three loading interfaces with No. four loading interfaces are powered by B phases, and No. five loading interfaces and No. six loading interfaces are all by C Mutually power.

A phase, B phase and C phase of the three-phase equilibrium monitor of this programme in setting time interval to three-phase and four-line electric energy meter Power-balance monitoring is carried out, and the data of monitoring are uploaded to controller, what controller was uploaded to three-phase equilibrium monitor immediately Data carry out calculating processing.If there is any two-phase work(after the data calculating processing that controller is uploaded to three-phase equilibrium monitor When the difference of rate is more than setting value, then the maximum phase line of current power is found out, if the maximum phase line of current power is A phases.

Then controller just gives one work order of interface power monitor immediately, and interface power monitor is immediately to No. one Loading interfaces, No. two loading interfaces, No. three loading interfaces, No. four loading interfaces, No. five loading interfaces and No. six loading interfaces are entered Row power monitoring, and monitoring result is uploaded into controller, controller is received and stood after the data transmitted in one to No. five loading interfaces Carry out calculating processing.If after calculating obtaining that the load in a loading interfaces is added in No. six loading interfaces or is added to It is that can most allow each phase power of power network to keep balance in No. six loading interfaces, then under the control of the controller just by a load The power supply of interface is switched to C phases from A phases.

The handoff procedure that the power supply of a number loading interfaces is switched to C phases from A phases is as follows：

First, it is assumed that before the handover, switch K1 is to switching K20, switch K25, switch K26, switch K27, switch K28, open K32, switch K33, switch K36, switch K37, switch K40, switch K41 and switch K42 are closed all in off-state, switch K21, Switch K22, switch K23, switch K24, switch K29, switch K30, switch K31, switch K34, switch K35, switch K38 and switch K39 is all in closure state.

Then, A is connected by the switch of a voltage sampling circuit, the voltage letter of a voltage sampling circuit collection A phase Number and be uploaded to controller.

Then, switch K42 closures connect C phases and Single-Phase Inverter Source, and the voltage signal of Single-Phase Inverter Source output is with A phases Voltage signal as reference, feedback signal is used as using the voltage signal that Single-Phase Inverter Source is exported, closed-loop control is constituted, in control SPWM drive signal is produced in device processed, the voltage waveform that Single-Phase Inverter Source is exported is being exported stabilization just through isolating transformer String ripple power supply.When sine-wave power and the A phase voltages that isolating transformer is exported are with amplitude same-phase, be closed at switch K1 and Switch K17, and simultaneously switch off switch K39, now the power supply state in a loading interfaces or and A phases on power supply shape State is identical.

Then, controller uses phase shifting control, after the filtered device filtering of the voltage waveform for exporting Single-Phase Inverter Source again Stable sine-wave power is exported through isolating transformer.When the sine-wave power and the same amplitude of C phase voltages of isolating transformer output During same-phase, switch K1 is disconnected, and is closed at switching K13, now the power supply state in a loading interfaces is just complete Identical with the power supply status in C phases, i.e., now the power supply of a loading interfaces has been switched to C phases from A phases.

Finally switch K42 is disconnected, Single-Phase Inverter Source is bypassed and exits, so far a Phase-switching end of job. Other loading interfaces switching principles are identical.

The three-phase and four-line electric energy meter system of this programme is uneven when the power for occurring being connected in each phase of three-phase and four-line electric energy meter The part load being connected in the three-phase and four-line electric energy meter high power phase line can be switched to three-phase and four-line electricity in time during weighing apparatus Can be in table low-power phase line, which not only adds the flexibility of whole network load switching, also increase phase line switching can By property, the stability and reliability of operation of power networks can be greatly improved, intelligence degree is high, good reliability, easily to being powered from electricity consumption The battery pack of module carries out charge and discharge control.

Preferably, also including the memory being connected with controller.Memory is easy to store the letter of three-phase and four-line electric energy meter Breath, it is simple and easy to use.

Preferably, also including filter, filter is connected in series in power output end and the isolation of Single-Phase Inverter Source On line between the power input of transformer.Filter improve isolating transformer input reliability, and then cause every It is higher from the reliability that transformer is exported.

Preferably, the no-load voltage ratio of isolating transformer is more than 1.17.Due to the width for the sinusoidal voltage that Single-Phase Inverter Source is exported Value is maximum to only have 0.85 times of input voltage, therefore connects in the back of wave filter isolating transformer, and no-load voltage ratio is more than 1.17, so that The output voltage amplitude of switching system reaches 220V, improves the practicality and reliability of system.

The utility model can reach following effect：

The utility model three-phase and four-line electric energy meter system, which is worked as, there is the power being connected in each phase of three-phase and four-line electric energy meter not The part load being connected in the three-phase and four-line electric energy meter high power phase line can be switched to the three-phase and four-line in time during balance In electric energy meter low-power phase line, which not only adds the flexibility of whole network load switching, phase line switching is also increased Reliability, can greatly improve the stability and reliability of operation of power networks, and intelligence degree is high, good reliability, easily to being supplied from electricity consumption The battery pack of electric module carries out charge and discharge control.

Brief description of the drawings

Fig. 1 is a kind of use state circuit theory attachment structure schematic diagram before the switching of the utility model embodiment.

Fig. 2 is on the basis of Fig. 1, to allow in handoff procedure the sine-wave power for exporting isolating transformer and A phase voltages A kind of use state circuit theory attachment structure schematic diagram during with amplitude same-phase.

Fig. 3 is on the basis of Fig. 2, to allow switch K1 and switch K17 to close, allow the one kind switched when K39 disconnects to use shape State circuit theory attachment structure schematic diagram.

Fig. 4 is on the basis of Fig. 3, to allow switch K13 to close, and allows switch K1 to disconnect, and makes the power supply of a loading interfaces Power supply has been switched to a kind of use state circuit theory attachment structure schematic diagram in C phases from A phases completely.

Fig. 5 is a kind of circuit theory attachment structure schematic diagram of the utility model embodiment from electricity consumption power supply module.

Fig. 6 is that the utility model embodiment upper electromagnet from a bulk charging bindiny mechanism of electricity consumption power supply module is compressed A kind of attachment structure schematic diagram when on lower electromagnet.

Fig. 7 is that the utility model embodiment upper electromagnet from a bulk charging bindiny mechanism of electricity consumption power supply module does not have It is pressed in a kind of attachment structure schematic diagram when on lower electromagnet.

Fig. 8 is the utility model embodiment from charger and microcontroller at the energization priority controlling organization of electricity consumption power supply module A kind of use state attachment structure schematic diagram when device is all also not upper electric.

Fig. 9 be the utility model embodiment from the energization priority controlling organization of electricity consumption power supply module be in upper electric when, only A kind of use state attachment structure schematic diagram when the power input positive pole of microcontroller has been powered on.

Figure 10 be the utility model embodiment from the energization priority controlling organization of electricity consumption power supply module be in upper electric when, only The power input positive pole of microcontroller switch on power when power supply is also had been turned on the power input negative pole of microcontroller one Plant use state attachment structure schematic diagram.

Figure 11 be the utility model embodiment from the energization priority controlling organization of electricity consumption power supply module be in upper electric when, only The power input positive pole of microcontroller switches on power, the power input negative pole of microcontroller also has been turned on power supply and charger A kind of use state attachment structure schematic diagram of power input positive pole when also having been turned on power supply.

Figure 12 be the utility model embodiment from the energization priority controlling organization of electricity consumption power supply module be in upper electric when, micro-control The power input positive pole of device processed switches on power, the power input negative pole of microcontroller also has been turned on the electricity of power supply, charger A kind of use state when the power input negative pole that source input anode also has been turned on power supply and charger also has been turned on power supply Attachment structure schematic diagram.

Figure 13 is a kind of circuit theory attachment structure schematic block that the utility model switch K1 to K42 is connected with controller Figure.

Figure 14 is that a kind of circuit theory that the present embodiment is connected from each part of electricity consumption power supply module with controller is connected Structural schematic block diagram.

Embodiment

Below by embodiment, and with reference to accompanying drawing, the technical solution of the utility model is described in further detail.

Embodiment：The three-phase and four-line electric energy meter system that a kind of load supplying phase line can automatically switch, referring to Fig. 1, Tu13Suo Show, including three-phase and four-line electric energy meter body, three-phase and four-line electric energy meter body includes A phase, B phase, C phase, zero line N and three-phase electric energy meter Measure module 110.Also include node J1, filter 104 and controller 107 and the three-phase equilibrium being connected respectively with controller monitoring Device 101, voltage sampling circuit 102, Single-Phase Inverter Source 103, isolating transformer 105, memory 106, No. two voltages are adopted Sample circuit 108 and interface power monitor 109.The power output end and isolating transformer of filter respectively with Single-Phase Inverter Source Power input connection, node J1 respectively with the power output end of isolating transformer and the sampling end of No. two voltage sampling circuits Connection, three-phase electric energy metering module is connected with controller.The no-load voltage ratio of isolating transformer is more than 1.17.

Also include the switch Ki that control end is connected with controller, wherein i is positive integer, i=1,1≤i≤42.

Also include be connected respectively with the monitoring side of the interface power monitor a loading interfaces 201, No. two load Interface 202, No. three loading interfaces 203, No. four loading interfaces 204, No. five loading interfaces 205 and No. six loading interfaces 206.

Referring to shown in Fig. 5, Figure 14, in addition to for controller power from electricity consumption power supply module, it is described to be powered mould from electricity consumption The battery pack that block includes battery connection module t22, can be connected together in series by several separate cells t26；Also include charger equal with cell number respectively, switching switch and current limliting module from electricity consumption power supply module；Electricity Pond link block includes the bulk charging bindiny mechanism equal with cell number；Set respectively in each bulk charging bindiny mechanism There is bulk voltage detection chip t101；The power output end of each charger is one-to-one to be connected to the one of each switching switch selection end On individual terminals；The turning end of each switching switch is one-to-one to be connected on one end of current limliting module, each current limliting module it is another One end is one-to-one to be connected in the bulk charging bindiny mechanism of battery connection module；Battery connection module is connected on the battery pack, institute State battery connection module t22 control end, each bulk voltage detection chip t101, the control end of each current limliting module and each cut The control end for changing switch is connected with controller respectively；And under the control of the controller, when not being battery pack charging, battery connection Each separate cell in battery pack can be sequentially connected in series by module becomes series-connected cell together, when for battery During group charging, the series-connected cell being sequentially connected in series in battery pack together can be become separate list by battery connection module Body battery.

Charger in this example is charger t2, charging t3 and charger t4.Switching switch in this example is switching Switch t5, switching switch t6 and switching switch t7.Current limliting module in this example is limited flow module t9, current limliting module t10 and limit Flow module t11.The selection end of each switching switch includes terminals d, terminals e and terminals f.Controller in this example As microcontroller.

It is shown in Figure 5, if the cell of the present embodiment battery pack has three, and set these three cells difference For a cell t19, No. two cell t20 and No. three cell t21；The bulk charging connection machine of battery connection module Structure has three, and it is respectively a bulk charging bindiny mechanism t12, No. two bulk charging connections to set these three bulk charging bindiny mechanisms Mechanism t13 and No. three bulk charging bindiny mechanism t14；It is double that battery connection module also includes group power output interface t15, a hilted broadsword Throw switch t17, No. two single-pole double-throw switch (SPDT) t18 and single knife switch t16；It is double that the positive pole of a number cell is connected to a hilted broadsword In the turning end of throw switch, the positive terminal of a contact portion of a single-pole double-throw switch (SPDT) in a bulk charging bindiny mechanism On end, No. two contact portions of a single-pole double-throw switch (SPDT) are on No. two contacts of No. two single-pole double-throw switch (SPDT)s, a monomer electricity The negative pole in pond is connected in the negative terminals of a bulk charging bindiny mechanism, and the negative pole of a cell is also connected to a group electricity In the negative terminals of source output interface；The positive pole of No. two cells is connected to the positive terminal of No. two bulk charging bindiny mechanisms On end, the positive pole of No. two cells is also connected on the positive terminal of group power output interface, No. two cells it is negative Pole is connected in the negative terminals of No. two bulk charging bindiny mechanisms, and the negative pole of No. two cells is also connected to single knife switch On one end；The negative pole t 25 of No. three cells is connected in the turning end of No. two single-pole double-throw switch (SPDT)s, No. two single-pole double-throw switch (SPDT)s A contact portion in the negative terminals of No. three bulk charging bindiny mechanisms, the positive pole t23 of No. three cells is connected to On the positive terminal of No. three bulk charging bindiny mechanisms, the positive pole of No. three cells is also connected to the other end of single knife switch On；The control end point of the control end of a number single-pole double-throw switch (SPDT), the control end of No. two single-pole double-throw switch (SPDT)s and single knife switch It is not connected with controller.

No. two contacts of a number single-pole double-throw switch (SPDT) and No. two contacts of No. two single-pole double-throw switch (SPDT)s are normally closed touch Point, when battery pack charges, No. two contacts of a single-pole double-throw switch (SPDT) and No. two contacts of No. two single-pole double-throw switch (SPDT)s are in Off-state, when battery pack there is not charging, No. two of No. two contacts of a number single-pole double-throw switch (SPDT) and No. two single-pole double-throw switch (SPDT)s are touched Point is in closure state；A number contact of a number single-pole double-throw switch (SPDT) and a contact of No. two single-pole double-throw switch (SPDT)s are equal For normally opened contact, when battery pack charges, No. one of a contact of a single-pole double-throw switch (SPDT) and No. two single-pole double-throw switch (SPDT)s is touched Point is in closure state, a number contact of a number single-pole double-throw switch (SPDT) and No. two single-pole double-throw switch (SPDT)s when battery pack there is not charging A contact be in off-state；The single knife switch is off when battery pack charges, and is not filled in battery pack Closure state is in when electric.

Referring to shown in Fig. 6, Fig. 7, each bulk charging bindiny mechanism includes sliding chamber t29, the lower horizontal block t30 of insulation, insulate and slide Horizontal block t36, sliding bar t32 and activity horizontal block t31 on motion block t38, insulation, the positive terminal of bulk charging bindiny mechanism is including upper Positive terminal termination t28 and lower positive terminal termination t27, the negative terminals of bulk charging bindiny mechanism include upper negative terminals Head t39 and lower negative terminal termination t40；Insulated slide block is slidably arranged in sliding intracavitary, and the lower horizontal block of insulation is fixedly installed on insulation Horizontal block is fixedly installed on the cunning intracavitary above insulated slide block, activity horizontal block activity cloth in cunning intracavitary below sliding shoe, insulation The cunning intracavitary above horizontal block in insulation is put, upper positive terminal termination and upper negative terminal termination are arranged at insulated slide block On lower surface, lower positive terminal termination and lower negative terminal termination are arranged on the upper surface of the lower horizontal block of insulation, in insulation Horizontal block is provided with vertical through hole t34, and sliding bar is slidably arranged in vertical through hole, and sliding bar upper end is fixedly connected on activity horizontal block On, sliding bar lower end is fixedly connected in the upper horizontal block of insulation, is set on the sliding bar in insulation between horizontal block and insulated slide block Spring t37 is pulled open, the two ends for pulling open spring extrude be connected on the lower surface of the upper horizontal block of insulation and insulated slide block respectively On upper surface；Lower electromagnet t35 is fixed with the upper surface of horizontal block in insulation, upper electromagnet is provided with activity horizontal block T33, and the electric electromagnetic force produced attracts each other when the electromagnetic force produced during the energization of upper electromagnet and logical lower electromagnet, and upper electricity The electromagnetic force that magnet is produced when being powered can promote insulated slide block after being attracted each other with the lower electromagnet electromagnetic force that electricity is produced when logical Move down, and upper positive terminal termination can be compressed and be conductively connected on lower positive terminal termination and can be by upper negative terminals Head is compressed and is conductively connected on lower negative terminal termination.

The positive pole of each cell is one-to-one to be connected electrically on lower positive terminal termination, the negative pole one of each cell It is connected electrically in one on lower negative terminal termination, positive terminal in the one-to-one electrical connection of positive pole of the other end of each current limliting module On termination, in the one-to-one electrical connection of negative pole of the other end of each current limliting module on negative terminal termination.

Referring to shown in Fig. 8-Figure 12, the power input of each charger and the power input of controller are conductively connected Energization priority controlling organization first gives controller to be powered on an energization priority controlling organization t75, and when upper electric, Ran Houzai It is powered to charger；Energization priority controlling organization first allows charger to power off when lower electric, then allows controller to power off again.

Referring to shown in Fig. 8-Figure 12, energization priority controlling organization include the sealed insulation tube t62 of right-hand member, insulation bearing piece t64, Insulated slide bar t63 and handle t61, insulation bearing piece is fixed on t66 in insulation tube, and slide opening t65 is transversely provided with insulation bearing piece, Insulated slide bar is slidably arranged in sliding block, and handle is fixedly connected on the left end of insulated slide bar；Under the inner tubal wall of insulation tube A positive terminal termination t71, negative terminal termination t72, No. two positive poles are from left to right fixed with bottom surface successively to connect End t73 and No. two negative terminal termination t74, and higher than No. one negative terminal termination of height of a positive terminal termination Height it is high, the height of a negative terminal termination is high higher than the height of No. two positive terminal terminations, No. two positive terminal terminations Height height it is high higher than the height of No. two negative terminal terminations；From a left side on the lower surface of the insulated slide bar of insulation bearing piece right To the right side be fixed with successively No. three positive terminal termination t67, No. three negative terminal termination t68, No. four positive terminal termination t69 and No. four negative terminal termination t70, and when insulated slide bar is moved to setting position, No. three positive terminal terminations, which can be compressed, leads It is connected electrically on a positive terminal termination, No. three negative terminal terminations, which can be compressed, to be conductively connected a negative terminal termination On, No. four positive terminal terminations, which can be compressed, to be conductively connected on No. two positive terminal terminations, and No. four negative terminal terminations can be compressed It is conductively connected on No. two negative terminal terminations；The power input positive pole of controller is connected electrically in positive terminal termination Lower end, the power input negative pole of controller is connected electrically in the lower end of a negative terminal termination, the power input of charger Positive pole is connected electrically in the lower end of No. two positive terminal terminations, and the power input negative pole of charger is connected electrically in No. two negative terminals The lower end of termination；No. three positive terminal terminations and No. four positive terminal terminations are both electrically connected with the power supply in energization priority controlling organization On the positive pole of input；No. three negative terminal terminations and No. four negative terminal terminations are both electrically connected with energization priority controlling organization On the negative pole of power input.

The present embodiment is when in use, shown in Figure 1, it is assumed that in general, a loading interfaces and No. two loads Interface is powered by A phases, and No. three loading interfaces with No. four loading interfaces are powered by B phases, No. five loading interfaces and No. six Loading interfaces are powered by C phases.

A phase, B phase and C of the three-phase equilibrium monitor of the present embodiment in setting time interval to three-phase and four-line electric energy meter Power-balance monitoring is mutually carried out, and the data of monitoring are uploaded to controller, controller is uploaded to three-phase equilibrium monitor immediately Data carry out calculating processing.If there is any two-phase after the data calculating processing that controller is uploaded to three-phase equilibrium monitor When the difference of power is more than setting value, then the maximum phase line of current power is found out, if the maximum phase line of current power is A phases.

First, it is shown in Figure 1, it is assumed that before the handover, switch K1 to switch K20, switch K25, switch K26, switch K27, switch K28, switch K32, switch K33, switch K36, switch K37, switch K40, switch K41 and switch K42 are all in disconnected Open state, switch K21, switch K22, switch K23, switch K24, switch K29, switch K30, switch K31, switch K34, switch K35, switch K38 and switch K39 are all in closure state.

Then, referring to shown in Fig. 2, Fig. 3, switch K42 closures connect C phases and Single-Phase Inverter Source, and Single-Phase Inverter Source is defeated The voltage signal that the voltage signal gone out is exported using the voltage signal of A phases as reference, using Single-Phase Inverter Source as feedback signal, Closed-loop control is constituted, SPWM drive signal is produced in the controller, the voltage waveform for exporting Single-Phase Inverter Source is filtered Stable sine-wave power is exported through isolating transformer again after device filtering.When the sine-wave power and A phases of isolating transformer output When voltage is with amplitude same-phase, it is closed at switch K1 and switchs K17, and simultaneously switch off switch K39, now a loading interfaces On power supply state or identical with the power supply status in A phases.

Then, shown in Figure 4, controller uses phase shifting control, makes the voltage waveform that Single-Phase Inverter Source is exported through filter Stable sine-wave power is exported through isolating transformer again after the filtering of ripple device.The sine-wave power and C exported when isolating transformer When phase voltage is with amplitude same-phase, switch K1 is disconnected, and is closed at switching K13, now the power supply electricity in a loading interfaces Source state is just completely identical with the power supply status in C phases, i.e., now the power supply of a loading interfaces is switched to from A phases C phases.

The three-phase and four-line electric energy meter system of the present embodiment, which is worked as, there is the power being connected in each phase of three-phase and four-line electric energy meter not The part load being connected in the three-phase and four-line electric energy meter high power phase line can be switched to the three-phase and four-line in time during balance In electric energy meter low-power phase line, which not only adds the flexibility of whole network load switching, phase line switching is also increased Reliability, can greatly improve the stability and reliability of operation of power networks, and intelligence degree is high, good reliability.

The energization priority controlling organization of the present embodiment is first powered by controller, and controller just allows battery connection module after being powered The series-connected cell being sequentially connected in series in battery pack together is become into separate cell, priority control is then electrified to Mechanism just allows charger to be powered, and can so fully ensure that when charger is powered, be separate between each cell , charging would not be impacted between each cell.

The present embodiment is in charging, and voltage checking chip can carry out voltage detecting to corresponding cell.When some list Body battery can reduce charging current when being full of by current limliting module, and current limliting can be passed through when some cell is not full of far also Module increases charging current.So as to make voltage contained by cell identical as far as possible.When each cell is full of and each single The voltage of body battery can disconnect charge power supply when identical.Or when each cell and underfill and each cell Voltage it is identical when can also disconnect charge power supply.So allow cell connect after, will not between the cell being connected in series There is electric current flowing, the reliability of battery is high.The charging current or charging voltage of each charger can be differed each other.Pass through Switching switch can select different chargers to some cell.The cooperation of switching switch and current limliting module can be needed preferably The cell to be charged provides charging current and charging voltage in real time, consequently facilitating entering to the charging progress of each cell Row individually control, also allows for individually controlling the charging voltage of each cell.Examined in charging process by temperature Surveying mechanism can detect to the temperature of cell, and can carry out overheat protector control to cell in charging.Pass through Dual power supply mechanism makes the present embodiment have dual power supply function, substantially increases dependable with function.

The present embodiment can make the damage of single cell not interfere with other cell chargings, and not be battery pack Each separate cell in battery pack can be sequentially connected in series during charging and become series-connected cell together, for electricity The series-connected cell being sequentially connected in series in battery pack together can be become separate cell during the group charging of pond, to every The charging process of individual cell can also carry out voltage detecting, and the charging progress of each cell individually can be controlled System, can also individually be controlled the charging voltage of each cell.And in charging excess temperature guarantor can be carried out to cell Shield control.Powered using dual power supply mechanism and realize the uninterrupted power supply of electrical equipment.It is safe, good reliability, and provided with logical Electric priority controlling organization in electric charging process in battery pack to first allowing the cell being connected in series to become independent cell After recharge, charging reliability is high.

The battery pack that the battery connection module of the present embodiment can allow well can be by each is separate in battery pack when charging Cell be sequentially connected in series and become series-connected cell together, will can be sequentially connected in series when being charged for battery pack in battery pack The series-connected cell linked together becomes separate cell, and reliability is high.

The present embodiment can improve battery pack can remain each separate list in battery pack in use Body battery is sequentially connected in series becomes series-connected cell together, easily automatically controlled to carrying out charge and discharge from the battery pack of electricity consumption power supply module System, reliability is high.

Embodiment of the present utility model is described above in conjunction with accompanying drawing, but is not limited when realizing by above-described embodiment, this Field those of ordinary skill can make a variety of changes or change within the scope of the appended claims.

Claims

1. the three-phase and four-line electric energy meter system that a kind of load supplying phase line can automatically switch, including three-phase and four-line electric energy meter body, Three-phase and four-line electric energy meter body includes A phase, B phase, C phase, zero line N and three-phase electric energy metering module (110), it is characterised in that also Including node J1 and controller (107) and the three-phase equilibrium monitor (101) being connected respectively with controller, a voltage sample Circuit (102), Single-Phase Inverter Source (103), isolating transformer (105), No. two voltage sampling circuits (108) and interface power prison Survey device (109)；The power input connection of the power output end of Single-Phase Inverter Source and isolating transformer, node J1 respectively with every From the sampling end connection of the power output end of transformer and No. two voltage sampling circuits, three-phase electric energy metering module connects with controller Connect；

Also include the switch Ki that control end is connected with controller, wherein i is positive integer, 1≤i≤42；

Also include node J18, node J14 and node J6, node J18 zero line is connected with A, node J14 zero line and B It is connected, node J6 zero line is connected with C；The zero line of node J18 zero line side, node J14 zero line side and node J6 End is all connected with zero line N respectively；

The electric energy metrical end of three-phase electric energy metering module, the monitoring side of three-phase equilibrium monitor and voltage sampling circuit are adopted Sample end is all connected with node J18, node J14 and node J6 respectively；

The power input of Single-Phase Inverter Source is connected by switching K40 with node J18, the power input of Single-Phase Inverter Source It is connected by switching K41 with node J14, the power input of Single-Phase Inverter Source is connected by switching K42 with node J6；

Also include a loading interfaces (201) being connected with the monitoring side of the interface power monitor respectively, No. two loads to connect Mouth (202), No. three loading interfaces (203), No. four loading interfaces (204), No. five loading interfaces (205) and No. six loading interfaces (206)；

Also include node J2, node J3, node J4, node J5, node J7, node J8, node J9, node J10, node J11, section Point J12, node J13, node J15, node J16, node J17 and node J19；

The node J6, switch K13, node J2, switch K14, node J3, switch K15, node J4, switch K16, node J5 and No. six loading interfaces are sequentially connected in series, the node J6, switch K21, node J7, switch K22, node J8, switch K23, section Point J9, switch K24, node J10 and No. five loading interfaces are sequentially connected in series, and the node J14, switch K29, node J11, are opened K30, node J12, switch K31, node J13 and No. four loading interfaces is closed to be sequentially connected in series, the node J14, switch K34, Node J15, switch K35, node J16 and No. three loading interfaces are sequentially connected in series, the node J18, switch K38, node J17 It is sequentially connected in series with No. two loading interfaces, the node J18, switch K39, node J19 and a loading interfaces are sequentially connected in series Connection；

The node J1, switch K1, node J2, switch K17 and node J19 be sequentially connected in series, the node J1, switch K2, Node J7, switch K25 and node J19 are sequentially connected in series, the node J1, switch K3, node J11, switch K32 and node J19 is sequentially connected in series, and the node J1, switch K4, node J15, switch K36 and node J19 are sequentially connected in series, the section Point J1, switch K5, node J3, switch K18 and node J17 are sequentially connected in series, the node J1, switch K6, node J8, switch K26 and node J17 are sequentially connected in series, and the node J1, switch K7, node J12, switch K33 and node J17 are sequentially connected in series company Connect, the node J1, switch K8, node J16, switch K37 and node J17 be sequentially connected in series, the node J1, switch K9, Node J4, switch K19 and node J16 are sequentially connected in series, the node J1, switch K10, node J9, switch K27 and node J16 is sequentially connected in series, and the node J1, switch K11, node J5, switch K20 and node J13 are sequentially connected in series, the section Point J1, switch K12, node J10, switch K28 and node J13 are sequentially connected in series；

Also include for controller power from electricity consumption power supply module, it is described to include battery connection module, energy from electricity consumption power supply module The battery pack being connected together in series by several separate cells；From electricity consumption power supply module also include respectively with The equal charger of cell number, switching switch and current limliting module；Battery connection module includes and cell number phase Deng bulk charging bindiny mechanism；Bulk voltage detection chip is respectively equipped with each bulk charging bindiny mechanism；Each charger Power output end is one-to-one to be connected on a terminals at each switching switch selection end；The turning end one of each switching switch On one end that current limliting module is connected to one, the one-to-one body for being connected to battery connection module of the other end of each current limliting module fills On electrical connection mechanism；Battery connection module is connected on the battery pack, the control end of the battery connection module, the inspection of each bulk voltage The control end for surveying chip, the control end of each current limliting module and each switching switch is connected with controller respectively；And in controller Control under, when not be battery pack charge when, battery connection module can by each separate cell in battery pack according to Secondary be connected in series becomes series-connected cell, when being charged for battery pack, and battery connection module will can successively go here and there in battery pack Join the series-connected cell linked together and become separate cell.

2. the three-phase and four-line electric energy meter system that a kind of load supplying phase line according to claim 1 can automatically switch, it is special Levy and be, in addition to the memory (106) being connected with controller.

3. the three-phase and four-line electric energy meter system that a kind of load supplying phase line according to claim 1 can automatically switch, it is special Levy and be, in addition to filter (104), filter is connected in series in the power output end and isolating transformer of Single-Phase Inverter Source Power input between line on.

4. the three-phase and four-line electric energy meter system that a kind of load supplying phase line according to claim 1 can automatically switch, it is special Levy and be, the no-load voltage ratio of isolating transformer is more than 1.17.