CN104362654B - Three-phase equilibrium electric power system and method and the modularization power distribution cabinet provided with the system - Google Patents
Three-phase equilibrium electric power system and method and the modularization power distribution cabinet provided with the system Download PDFInfo
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- CN104362654B CN104362654B CN201410736623.5A CN201410736623A CN104362654B CN 104362654 B CN104362654 B CN 104362654B CN 201410736623 A CN201410736623 A CN 201410736623A CN 104362654 B CN104362654 B CN 104362654B
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Abstract
The invention discloses a kind of three-phase equilibrium electric power system and method and the modularization power distribution cabinet provided with the system, wherein electric power system includes breaker, arrester module is electrically connected, CPU module, and the CPU module includes the central processing unit and touch-screen of electrical connection；Neutral line current sensor for detecting general supply zero-sequence current, neutral line current sensor is electrically connected with central processing unit；Some adjustment units；The three-phase equilibrium method of wherein three-phase equilibrium electric power system is, is issued an order collection neutral line current and current value of each output by central processing unit, then carries out computing and draw optimal load Adjusted Option, then performed by each adjustment unit by instruction.Wherein modularization power distribution cabinet is provided with above-mentioned three-phase equilibrium electric power system, therefore the modularization power distribution cabinet of invention has the function of three-phase equilibrium function and modular arrangements simultaneously, while operating safety factor is improved, module is formulated as needed, cost of manufacture is reduced.
Description
Technical field
The present invention relates to power supply unit technical field, more particularly to a kind of three-phase equilibrium electric power system and method and provided with this
The modularization power distribution cabinet of system.
Background technology
Electrical equipment and its circuit are provided with power distribution cabinet, for distributing electric power energy, motive power distribution center is referred to as.They are concentrated
Transformer station installed in electricity consumption concentration zones, distributes to electric energy subordinate's controller switching equipment of different location.Usual power distribution cabinet includes machine
General supply is provided with cabinet, the rack.
With the fast-developing and profound application of technology, to the reliability requirement more and more higher of power supply；With setting
Standby is continuously increased, and the three-phase equilibrium problem of its distribution system also increasingly causes the attention of management level.Excessive threephase load
Imbalance, can cause the probability that power supply and UPS i.e. uninterrupted power source break down to increase, the normal operation of serious threat equipment.
The harm of three-phase imbalance includes：Add the electric energy loss of circuit；Add the electric energy loss of distribution transformer；
Distribution transforming is exerted oneself reduction；Distribution transforming produces zero-sequence current；Influence safe operation of electrical equipment etc..Because absolute three-phase equilibrium is not
Exist, actual three-phase system is constantly present different degrees of energy imbalance.When distribution transforming produces zero-sequence current, zero line is to have
Electric current by when, not only phase line is lossy, and zero line also produces loss, so as to add the loss of power network line.
For the three-phase imbalance problem of power distribution cabinet, the measure used at present is generally dilatation.But existing power distribution cabinet is adopted
Customized production situation is used, once that can not carry out dilatation or change after specification determination, later stage dilatation can only change power distribution cabinet, and replacing is matched somebody with somebody
Electric cabinet, which needs to have a power failure, to be changed, and the dilatation to the later stage brings greatly difficult.The problem of for three-phase imbalance, people can also be used
The mode of work operation adjustment phase reaches three-phase equilibrium, but existing power distribution cabinet is not easy to artificial operation.
The content of the invention
The first object of the present invention is to provide a kind of three-phase equilibrium electric power system, and the electric power system can monitor three automatically
Balance each other, and three-phase equilibrium adjust automatically can be carried out according to real-time load running situation, electric power system is remained three
The running status balanced each other, so as to improve the safety coefficient of operation, reduces the loss of power network line, the work with energy-conservation
With.
In order to solve the above technical problems, the technical scheme is that：A kind of three-phase equilibrium electric power system bag and civil power electricity
City's electrical circuit breakers of connection, in addition to：ATS switching switches, the input of the ATS switchings switch electrically connects the civil power open circuit
Device, the output end of the ATS switchings switch is electrically connected with some adjustment units for being used to adjust threephase load balance；The regulation
Unit, each adjustment unit includes：A phases switch, B phases switch and the C phases being connected respectively with three phase mains switch
Device, switch described in each phase includes a switching relay and a switch shape for being used to detect the switching relay status
State sensor；Breaker is exported, the input of the output breaker electrically connects three switching relays simultaneously, described defeated
Go out the output end electrical connection load of breaker；The output breaker is also electrically connected with an output switch for being used to detect its state
State sensor；Output voltage sensor and output current sensor, are respectively used to detect the output electricity of the adjustment unit
Pressure and output current；Cell processor, the Cell processor is used to gather the output voltage sensor, the output current
The data of sensor and each on off state sensor, and the data collected are transferred to central processing unit；Always according to institute
State the regulating command control output breaker and each switching relay on-off that central processing unit is sent；Neutral line current is passed
Sensor, the general supply zero-sequence current for detecting the electric power system, the neutral line current sensor and the central processing unit
Electrical connection；Central processing unit, for the zero-sequence current value collected according to the neutral line current sensor and the unit
The data that processor is transmitted calculate whether threephase load balances, and are sent according to the result of calculating to the Cell processor
The regulating command；Touch-screen, for realizing human-computer dialogue.
Preferred embodiment is that each described adjustment unit is designed with a Cell processor.
Preferred embodiment is that four adjustment units share a Cell processor.
Preferred embodiment is, each adjustment unit also includes a temperature sensor, the temperature sensor with it is described
Cell processor is electrically connected.
Preferred embodiment is to be connected with arrester between city's electrical circuit breakers and the ATS switching switch.
Preferred embodiment is that the central processing unit is logical by RS485 or CAN with each Cell processor
News agreement is communicated.
Preferred embodiment is that the input of the ATS switchings switch is also connected with stand-by power supply by a UPS breakers.
After adopting the above technical scheme, the beneficial effects of the invention are as follows：Due to the three-phase equilibrium electric power system bag of the present invention
Central processing unit is included, the neutral line current sensor for detecting general supply zero-sequence current, the neutral line current sensor and centre
Manage device electrical connection；Some adjustment units, A phases switch, the B that each adjustment unit includes being connected with three phase mains respectively is tangent
Parallel operation and C phase switch, each phase switch, which includes a switching relay and one, to be used to detect switching relay status
On off state sensor；For detecting each switching relay on-off state and adjustment unit voltage and current data and will detect
Data be uploaded to the Cell processor of central processing unit.The present invention central processing unit according to the zero-sequence current received, respectively
The parameters such as voltage, the electric current of road load carry out computing, and judge whether threephase load balances, if during three-phase imbalance, according to fortune
Calculate result and match optimal load handover scheme, and by above-mentioned handover scheme show on the touchscreen, by user confirm after general
Selecting for determining cuts instruction and sends Cell processor to, controls to need the switching relay of adjustment unit switched by Cell processor
Break-make, so as to complete the alternate switching of load, finally reaches three-phase equilibrium.Therefore the three-phase equilibrium electric power system of the present invention can
Holding system is run under three-phase equilibrium state all the time, so as to improve the safety coefficient of system operation, reduces power network line
Loss.
Due to the common same Cell processor of four adjustment units, the structure is while original function is ensured
Save cost.
The second object of the present invention is to provide a kind of adjusting method of the three-phase equilibrium of three-phase equilibrium electric power system, the party
Method monitors three-phase equilibrium according to the data of real-time electric power system, and can calculate optimal three-phase equilibrium adjustment side automatically
Case.
In order to solve the above technical problems, the technical scheme is that：A kind of three-phase equilibrium of three-phase equilibrium electric power system
Method, comprise the following steps：
S10：The data of each adjustment unit of collection：Each each on off state of Cell processor collection is passed
The data of the data of sensor, the output voltage sensor and the output current sensor；And give the data transfer of collection
The central processing unit；
S20：Calculation process：The current data meter that the central processing unit is transmitted according to each described Cell processor
Calculate three-phase average load current value PI, PI=(IA+IB+IC)/3；
S30：Judgement is compared：Average load current value PI is compared with threephase load current value IA, IB and IC respectively；
And calculate each phase difference：PI-IA=PA, PI-IB=PB, PI-IC=PC；If PA, PB or PC are on the occasion of illustrating this
Phase load is bigger than normal；If PA, PB or PC are negative value, illustrate that the phase load is less than normal；
S40：Calculate matching：For the negative value in PA, PB or PC calculate it is all can be equal on the occasion of possibility combination, use
Poll detection matching；Matching and negative value differ the single load terms within 3% first, if without calculating two loads again
The possibility that item is differed within 3% after being added with negative value is combined, and is differed after then calculating three load terms additions with negative value
Possibility combination within 3%, after the completion of all combinations matches, poll is calculated on the occasion of subtracting each combination phase, and result is minimum
5 combination retain, remaining deletion；
S50：Display processing result：Central processing unit on the touchscreen, is selected remaining 5 combination displays simultaneously by user
Carry out manual confirmation；
S60：Perform switching：The integrated mode confirmed according to user, it is necessary first to the adjustment unit of adjustment on the occasion of
The relay of item load disconnects, and then connects the relay of the negative value of the adjustment unit, alternate the cutting of completion load
Change；
S70：Detect neutral line current：Perform after the completion of switching, central processing unit gathers the numerical value of neutral line current sensor, if
The numerical value of the neutral line current collected is not less than 1, and repeat step S10 and S20 judge whether PA, PB and PC numerical value are less than
3%, exit regulation program if less than 3%；If still greater than 3%, repeat step S10 to S70.
The third object of the present invention is to provide a kind of modularization power distribution cabinet, and the power distribution cabinet is powered provided with above-mentioned three-phase equilibrium
System, makes the present invention have the function of keeping three-phase equilibrium；Modular arrangements of the present invention, are allowed users to according to actual need simultaneously
Customized module is wanted, is easy to dilatation, cost is also saved.
In order to solve the above technical problems, the technical scheme is that：A kind of modularization power distribution cabinet, includes the machine of standardization
Some regulations in above-mentioned three-phase equilibrium electric power system, the three-phase equilibrium electric power system are provided with cabinet, the rack
Unit constitutes an integrated module；Several described integrated modules are provided with the rack.
Preferred embodiment is that four adjustment units constitute an integrated module, and each integrated module is all provided with
There is a fault trip device for being used to automatically disengage the rack, the fault trip device is electrically connected with the Cell processor.
After adopting the above technical scheme, the beneficial effects of the invention are as follows：Due to the modularization three-phase equilibrium distribution of the present invention
Cabinet includes rack, because being provided with the integrated module of some modular arrangements in rack, enables the power distribution cabinet of the present invention according to user
Be actually needed and be customized module, so as to save cost, also make easily dilatation of the invention.While the integrated mould of this power distribution cabinet
Group includes three-phase equilibrium electric power system, power distribution cabinet is had the self balancing function of three-phase, and the loss of power network is low when it runs, fortune
Row safety coefficient is high, and energy-saving effect is notable.Therefore the present invention is provided simultaneously with modular arrangements, three autobalances, and output end is pre-
Termination, can not have a power failure the functions such as dilatation and maintenance.
Because every four adjustment units constitute an integrated module, each integrated module is equipped with one
Fault trip device for automatically disengaging the rack, the fault trip device is electrically connected with the Cell processor, the structure
Substantial amounts of crimping workload is avoided, the later stage very simply can be adjusted and change, greatly reduce and artificially wind occur
The possibility of danger；When the structure can also make adjustment unit break down and cause temperature too high, by temperature sensor react to
Central processing unit, so as to improve safety coefficient；, being capable of automatic detachment machine when structure makes the failure of some adjustment unit simultaneously
Cabinet, so as to avoid the continuation extension of failure.
In summary, three-phase equilibrium electric power system and method for the present invention and the modularization power distribution cabinet provided with the system are solved
Electric power system three-phase imbalance and it is difficult to the technical problems such as dilatation in the prior art, the present invention enough keeps system equal three all the time
Run under weighing apparatus state, so as to improve the safety coefficient of system operation, reduce the loss of power network line；It is provided simultaneously with modularization
Configuration, three autobalances, output end pre-terminated, can not have a power failure the functions such as dilatation and maintenance.
Brief description of the drawings
Fig. 1 is the structural representation of the modularization power distribution cabinet provided with three-phase equilibrium electric power system of the present invention；
Fig. 2 is the theory diagram of the three-phase equilibrium electric power system of embodiment one；
Fig. 3 is the theory diagram of the three-phase equilibrium electric power system of embodiment two；
Fig. 4 is the theory diagram of the adjustment unit of the three-phase equilibrium electric power system of the present invention；
Fig. 5 is the flow chart of the three-phase equilibrium method of the three-phase equilibrium electric power system of the present invention；
In figure：1-rack, 2-touch-screen, 3-integrated module.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment one：
As shown in Fig. 2 a kind of three-phase equilibrium electric power system, including the breaker electrically connected with civil power, ATS switchings switch,
Neutral line current sensor, central processing unit, touch-screen 2 and adjustment unit；The input of wherein ATS switching switches connects with breaker
Connect, the input of ATS switching switches is also connected with stand-by power supply by a UPS breakers.
As Fig. 2 and Fig. 4 jointly shown in, ATS switching switch output end be electrically connected with it is multiple be used for adjust threephase load put down
The adjustment unit of weighing apparatus, each adjustment unit includes：
The A phases switch that is located in three phase mains A phases, the B phases switch being located in three phase mains B phases and it is located at three-phase electricity
C phase switch in the C phases of source.
Wherein A phases switch includes A phase relays and A phase on off state sensors, A phase relays and Cell processor electricity
Connection, i.e., control break-make by Cell processor；A phase on off state sensors are electrically connected with Cell processor, i.e., by cell processing
Device gathers the state value that correspond to A phase relay break-makes.
Wherein B phases switch includes B phase relays and B phase on off state sensors, B phase relays and Cell processor electricity
Connection, i.e., control break-make by Cell processor；B phase on off state sensors are electrically connected with Cell processor, i.e., by cell processing
Device gathers the state value that correspond to B phase relay break-makes.
Wherein C phases switch includes C phase relays and C phase on off state sensors, C phase relays and Cell processor electricity
Connection, i.e., control break-make by Cell processor；C phase on off state sensors are electrically connected with Cell processor, i.e., by cell processing
Device gathers the state value that correspond to C phase relay break-makes
Above-mentioned A phases switch, B phases switch and C phases switch jointly with output voltage sensor, output current sensor
With output breaker connection；Wherein output voltage sensor and output current sensor is electrically connected with Cell processor, will
The output voltage and output current of this adjustment unit detected are uploaded to Cell processor；Wherein output breaker is additionally provided with one
Individual output switch state sensor, the output breaker and output switch state sensor are electrically connected with Cell processor.
Each adjustment unit of the present embodiment is equipped with a Cell processor, and Cell processor selects single-chip microcomputer
Processor.
As Fig. 2 and Fig. 4 jointly shown in, the neutral line current sensor of this implementation, which is located on the zero line of general supply, gathers zero sequence electricity
Stream, and zero-sequence current is transferred to the central processing unit electrical connection being connected electrically.
As Fig. 2 and Fig. 4 jointly shown in, the central processing unit of the present embodiment and the Cell processor of each adjustment unit are electrically connected
Connect, and central processing unit and adjustment unit are communicated by communications protocol such as RS485 or CANs.The center is handled
The data that zero-sequence current value, the Cell processor that device is collected according to neutral line current sensor are transmitted calculate threephase load
No balance.If threephase load is uneven, central processing unit computing matches optimal load handover scheme, and will load switching side
Case is shown on the touch-screen 2 electrically connected with central processing unit, and load handover scheme is confirmed by user.The touch-screen 2 is used for real
Existing human-computer dialogue, this can notify user by forms such as short message, phone, networks.
As shown in figure 4, each adjustment unit of the three-phase power supply system of the present embodiment also includes a temperature sensor, should
Temperature sensor is electrically connected with Cell processor.The temperature sensor is electrically connected with Cell processor；The temperature sensor is used for
The temperature of the adjustment unit is detected, to avoid some dangerous.
As shown in Fig. 2, Fig. 4 and Fig. 5, the three-phase equilibrium electric power system of the present embodiment when in use, under original state, module
Acquiescence is operated in the specified phase in A phases, B phases and C phases three, is specially：The A phase relay closure states of first adjustment unit, A
It is mutually acquiescence phase；The B phase relay closure states of second adjustment unit, B phases are acquiescence phase；The C phase relays of 3rd adjustment unit
Device closure state, C phases are acquiescence phase；The A phase relay closure states of 4th adjustment unit, i.e. A phases are acquiescence phase.
Embodiment two：
The present embodiment and embodiment one are essentially identical, and difference is：
As shown in Figure 3 and Figure 4, four adjustment units of the three-phase equilibrium electric power system of the present embodiment are shared at a unit
Manage device.
For example：The A phase relays and A phase on off states sensor, B phase relays of first adjustment unit switch shape with B phases
State sensor, C phase relays and C phase on off state sensors and output breaker and output switch state sensor；Second
A phase relays and A phase on off states sensor, the B phase relays and B phase on off states sensor, C phase relays of adjustment unit
With C phase on off state sensors and output breaker and output switch state sensor；The A phase relays of 3rd adjustment unit
With A phase on off states sensor, B phase relays and B phase on off states sensor, C phase relays and C phase on off state sensors
And output breaker and output switch state sensor；A phase relays and A phases the on off state sensing of 4th adjustment unit
Device, B phase relays and B phase on off states sensor, C phase relays and C phase on off state sensors and output breaker and
Output switch state sensor is electrically connected with a Cell processor.Because four adjustment units of the present embodiment share a list
First processor, so as to save cost.
The three-phase equilibrium electric power system of above-described embodiment carries out the adjusting method of three-phase equilibrium, as shown in figure 5, including following
Step：
S10：Gather the data of each adjustment unit：Each Cell processor gathers A phase on off states sensor, B phases
On off state sensor and C phase on off states sensor, the data of output switch state sensor, also gather output voltage sensing
The data of device and output current sensor；And by the data transfer of collection to central processing unit；Each regulation list of the present invention
The corresponding adjustment unit coding of first each numerical value gathered, is transmitted to central processing unit together；Central processing unit is received
To after numerical value, according to different adjustment unit coded memories or processing data.
S20：Calculation process：The current data that central processing unit is transmitted according to unit processor calculates three-phase
Average load current value PI, PI=(IA+IB+IC)/3.
S30：Judgement is compared：Average load current value PI is compared with threephase load current value IA, IB and IC respectively；
And calculate each phase difference：PI-IA=PA, PI-IB=PB, PI-IC=PC；If PA, PB or PC are on the occasion of illustrating this
Phase load is bigger than normal；If PA, PB or PC are negative value, illustrate that the phase load is less than normal；Specially：That is PA>0, the A phases need to reduce
Load；PB>0, the B phases, which need to reduce, to be loaded；PC>0, the C phases, which need to reduce, to be loaded；Tune plus phase are shown to be if negative value：I.e.
PA<0, the A phases need increase to load；PB<0, the B phases need increase to load；PC<0, the C phases need increase to load.
S40：Calculate matching：For the negative value in PA, PB or PC calculate it is all can be equal on the occasion of possibility combination, use
Poll detection matching；Matching and negative value differ the single load terms within 3% first, if without calculating two loads again
The possibility that item is differed within 3% after being added with negative value is combined, and is differed after then calculating three load terms additions with negative value
Possibility combination within 3%, after the completion of all combinations matches, poll is calculated on the occasion of subtracting each combination phase, and result is minimum
5 combination retain, remaining deletion.
S50：Display processing result：Central processing unit on the touchscreen, is selected remaining 5 combination displays simultaneously by user
Carry out manual confirmation；The present embodiment user selection adjustment mode be：The load of the A phases of some adjustment unit is switched to C phases,
That is PA>0, the A phases, which need to reduce, to be loaded；PC<0, the C phases need increase to load.
S60：Perform switching：The integrated mode confirmed according to user, it is necessary first to the adjustment unit of adjustment it is negative on the occasion of item
The relay of load disconnects, and then connects the relay of the negative value of the adjustment unit, completes the alternate switching of load.For example：
The A phase relays of first adjustment unit are in closure state (B phase relays and the successive device states of C are in off-state), i.e.,
Three phase mains A phase powering loads.The B phase relays of second adjustment unit are in closure state (A phase relays and the successive devices of C
State is in off-state), i.e. three phase mains B phases powering load.The C phase relays of 3rd adjustment unit are in closed form
State (A phase relays and the successive device states of B are in off-state), i.e. three phase mains C phases powering load.4th adjustment unit
A phase relays be in closure state (B phase relays and the successive device states of C are in off-state), i.e., three phase mains A phases are given
The three-phase electricity for the adjustment unit of load handover scheme-first that load supplying ... central processing unit confirms user from touch-screen
The load of the A phases in source switches to C phases-be converted into instruction, and is transmitted to Cell processor.Cell processor is performed according to instruction.Specifically
For：The electric signal disconnected to the first adjustment unit A phase relays, then detects the state value of A phase on off state sensors, works as inspection
A phase relays are measured to disconnect after corresponding state value；The electricity that Cell processor is closed to the C phase relays of the first adjustment unit again
Signal, then detects the state value of C phase on off state sensors again, and the state value that C phase relays are closed is correspond to when detecting
Afterwards, learn that the first adjustment unit completes the alternate switching of load, whole switching time does not interfere with confession within 10ms
The normal operation of electric system load.
S70：Detect neutral line current：Perform after the completion of switching, central processing unit gathers the numerical value of neutral line current sensor, if
The numerical value of the neutral line current collected is not less than 1, and repeat step S10 and S20 judge whether PA, PB and PC numerical value are less than
3%, exit regulation program if less than 3%；If still greater than 3%, repeat step S10 to S70.
From the foregoing, the present invention has advantages below compared with prior art：
1., can autobalance threephase load balance, therefore the present invention can reduce the three characteristics of the middle term imbalance caused by line
Road electric energy loss and the electric energy loss of distribution transformer, and then reach the purpose of economize on electricity.
2., it can reduce, line load caused by three characteristics of the middle term laod unbalance is excessive, situations such as distribution transforming caused is generated heat,
So as to improve the security of distribution system.
3. the efficiency of motor, can be improved, the economy and security of motor is improved.
4. power network, can be purified, the security of power network is improved, electric power is saved, reaches the purpose of energy-conservation.
Embodiment three：
As shown in figure 1, a kind of modularization power distribution cabinet provided with three-phase equilibrium electric power system, includes the rack 1 of standardization, should
Four adjustment units being provided with rack 1 in three-phase equilibrium electric power system constitute an integrated module 3；Provided with many in the rack 1
Individual integrated module 3.
One integrated module 3 of the present embodiment is made up of four adjustment units.Each adjustment unit is equipped with one simultaneously
Fault trip device for automatically disengaging rack 1, the fault trip device is electrically connected with Cell processor.
The present embodiment is electrically connected per phase load output end by plugging power-source connector with load, wherein plug-in type electricity
Source connector selects aviation formula banjo.
As shown in figure 1, each adjustment unit of this implementation includes 6 tunnels or the load output of 9 tunnels, four adjustment unit compositions one
Individual integrated module 3, the integrated module 3 is modular arrangements, therefore each integrated module 3 is run independently of other integrated modules 3.
When an integrated module 3 breaks down or damaged, the normal operation of other integrated modules 3 is not influenceed.Therefore this implementation is matched somebody with somebody
Electric cabinet can easily carry out dilatation and maintenance is changed.The fault trip device of the present embodiment makes each integrated module 3 be respectively provided with certainly
Dynamic ejection function, when integrated module 3 breaks down, fault trip device is obtained after signal from Cell processor, by integrated module 3
From the automatic spring of rack 1, it is automatically disengaged rack 1, continue to expand so as to avoid failure, therefore the power distribution cabinet energy of the present invention
Enough safe and reliable operations.
When the temperature of some integrated module 3 of the power distribution cabinet of the present invention is too high, Cell processor collects the temperature value
Afterwards, the fault trip device action of integrated module 3 is can control, it is ejected rack 1；Or make the electric with civil power of this integrated module 3
The breaker actuation of connection, so as to improve the safety coefficient of the present invention.
The three-phase equilibrium electric power system of other the present embodiment also can carry out three-phase equilibrium tune according to flow as shown in Figure 5
It is whole, therefore the power distribution cabinet of the present invention can reduce the electricity of line energy loss and distribution transformer caused by three characteristics of the middle term imbalance
It can be lost, and then reach the purpose of economize on electricity.The power distribution cabinet of the present invention can be reduced, and circuit caused by three characteristics of the middle term laod unbalance is born
Excessive, situations such as distribution transforming caused is generated heat is carried, so as to improve the security of distribution system.The power distribution cabinet of the present invention can be improved
The efficiency of motor, improves the economy and security of motor.The power distribution cabinet of the present invention can purify power network, improve power network
Security, save electric power, reach the purpose of energy-conservation.
The power distribution cabinet of the present invention can be equipped with isolating transformer module, UPS module, meterage module, precision air conditioner mould
The auxiliary function module such as block, is the safer protection of distribution system.
An integrated module 3 is constituted for the preferred embodiment of the present invention by four adjustment units, technology in practical application
Personnel can need to be optionally combined according to the structure and power supply of power distribution cabinet.
The preferred embodiment of present invention described above, is not intended to limit the invention, it is all the present invention spirit and
Any modification for being made within principle, etc. the improvement of same modularization three-phase equilibrium distribution cabinet etc., should be included in this
Within the protection domain of invention.
Claims (10)
1. three-phase equilibrium electric power system, including the city's electrical circuit breakers electrically connected with civil power, it is characterised in that also include：
Touch-screen, for realizing human-computer dialogue；
Central processing unit, the touch-screen is electrically connected with the central processing unit；
Neutral line current sensor, the general supply zero-sequence current for detecting the electric power system, the neutral line current sensor with
The central processing unit electrical connection；
ATS switching switches, the input of the ATS switchings switch electrically connects city's electrical circuit breakers；
Some adjustment units for being used to adjust threephase load balance, each adjustment unit switches switch with the ATS
Output end is electrically connected, and each adjustment unit includes：
A phases switch, B phases switch and the C phase switch being connected respectively with three phase mains, switch described in each phase include one
Individual switching relay and an on off state sensor for being used to detect the switching relay status；
Breaker is exported, the input of the output breaker electrically connects three switching relays simultaneously, and the output is broken
The output end electrical connection load of road device；The output breaker is also electrically connected with an output switch state for being used to detect its state
Sensor；
Output voltage sensor and output current sensor, are respectively used to detect output voltage and the output of the adjustment unit
Electric current；
Cell processor, the Cell processor is electrically connected with the central processing unit, and the Cell processor is used to gather institute
State the data of output voltage sensor, the output current sensor and each on off state sensor, and will collect
Data are transferred to the central processing unit；The output breaker is controlled always according to the regulating command that the central processing unit is sent
With each switching relay on-off；
The central processing unit is used for the zero-sequence current value collected according to the neutral line current sensor and the unit
The data that processor is transmitted calculate whether threephase load balances, and are sent according to the result of calculating to the Cell processor
The regulating command.
2. three-phase equilibrium electric power system according to claim 1, it is characterised in that each described adjustment unit is designed with
One Cell processor.
3. three-phase equilibrium electric power system according to claim 1, it is characterised in that four adjustment units share one
The Cell processor.
4. the three-phase equilibrium electric power system according to Claims 2 or 3, it is characterised in that each adjustment unit is also wrapped
A temperature sensor is included, the temperature sensor is electrically connected with the Cell processor.
5. three-phase equilibrium electric power system according to claim 4, it is characterised in that city's electrical circuit breakers and the ATS
Arrester is connected between switching switch.
6. three-phase equilibrium electric power system according to claim 5, it is characterised in that the central processing unit with it is each described
Cell processor is communicated by RS485 or CAN communications protocol.
7. three-phase equilibrium electric power system according to claim 6, it is characterised in that the input of the ATS switchings switch
Stand-by power supply is also connected with by a UPS breakers.
8. the three-phase equilibrium adjusting method of three-phase equilibrium electric power system according to claim 1, it is characterised in that including with
Lower step：
S10：The data of each adjustment unit of collection：Each Cell processor gathers each on off state sensor
Data, the data of the output voltage sensor and the output current sensor；And by the data transfer of collection to described
Central processing unit；
S20：Calculation process：The current data that the central processing unit is transmitted according to each described Cell processor is calculated
Three-phase average load current value PI, PI=(IA+IB+IC)/3；
S30：Judgement is compared：Average load current value PI is compared with threephase load current value IA, IB and IC respectively；And count
Calculate each phase difference：PI-IA=PA, PI-IB=PB, PI-IC=PC；If PA, PB or PC are on the occasion of illustrating that this is mutually born
Carry bigger than normal；If PA, PB or PC are negative value, illustrate that the phase load is less than normal；
S40：Calculate matching：For the negative value in PA, PB or PC calculate it is all can be equal on the occasion of possibility combination, using poll
Detection matching；Matching and negative value differ the single load terms within 3% first, if without calculating two load terms phases again
Plus the possibility with negative value difference within 3% is combined afterwards, then calculate after three load terms are added and differed with negative value 3%
Within possibility combination, after the completion of all combinations matches, poll is calculated on the occasion of subtracting each combination phase, by minimum 5 of result
Combination is retained, remaining deletion；
S50：Display processing result：Remaining 5 combination displays on the touchscreen, are selected by user and carried out by central processing unit
Manual confirmation；
S60：Perform switching：The integrated mode confirmed according to user, it is necessary first to the adjustment unit of adjustment it is negative on the occasion of item
The relay of load disconnects, and then connects the relay of the negative value of the adjustment unit, completes the alternate switching of load；
S70：Detect neutral line current：Perform after the completion of switching, central processing unit gathers the numerical value of neutral line current sensor, if collection
The numerical value of the neutral line current arrived is not less than 1, and repeat step S10 and S20 judge whether PA, PB and PC numerical value are less than 3%, if
Regulation program is exited less than 3%；If still greater than 3%, repeat step S10 to S70.
9. modularization power distribution cabinet, includes the rack of standardization, it is characterised in that any provided with claim 1 to 7 in the rack
Adjustment unit composition one in three-phase equilibrium electric power system described in, multiple three-phase equilibrium electric power systems is integrated
Module；Several described integrated modules are provided with the rack.
10. modularization power distribution cabinet according to claim 9, it is characterised in that four adjustment units constitute an institute
Integrated module is stated, each integrated module is equipped with a fault trip device for being used to automatically disengage the rack, the event
Barrier electrical apparatus release is electrically connected with the Cell processor.
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| CN104882957B (en) * | 2015-06-17 | 2017-01-04 | 中国热带农业科学院南亚热带作物研究所 | A kind of electric power system in agricultural production base |
| CN106208362A (en) * | 2016-09-14 | 2016-12-07 | 江苏易弘联控智能科技有限公司 | A kind of touth-interactive controller of double power supply converting switch |
| CN111226373B (en) * | 2017-10-19 | 2024-05-31 | 康明斯发电Ip公司 | Current balancing for automatic transfer switch |
| CN109742775B (en) * | 2018-12-29 | 2023-12-19 | 深圳市嘉兆鸿电子有限公司 | Three-phase load balancing device and method |
| CN110445154A (en) * | 2019-08-01 | 2019-11-12 | 河北金江电气股份有限公司 | A kind of improvement three-phase imbalance power distribution cabinet |
| CN114336688A (en) * | 2020-10-10 | 2022-04-12 | 维谛技术(西安)有限公司 | Phase modulation method, device and equipment based on cabinet level monitoring equipment group |
| CN112564094A (en) * | 2020-11-30 | 2021-03-26 | 苏州浪潮智能科技有限公司 | Machine room power control method, device and system |
| CN114552303B (en) * | 2022-01-28 | 2023-07-25 | 苏州浪潮智能科技有限公司 | Three-phase load balancing power distribution socket and server |
| CN115800326B (en) * | 2022-11-17 | 2023-05-26 | 北京城建设计发展集团股份有限公司 | Distributed three-phase power supply self-balancing system and method |
| CN116780353A (en) * | 2023-06-30 | 2023-09-19 | 广东云下汇金科技有限公司 | Data center power distribution column cabinet with three-phase balance function and control method thereof |
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