CN104362654A - Three-phase balance power supply system, three-phase balance method of three-phase balance system, as well as modular power distribution cabinet with three-phase balance power supply system - Google Patents
Three-phase balance power supply system, three-phase balance method of three-phase balance system, as well as modular power distribution cabinet with three-phase balance power supply system Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
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- H02J13/0062—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention discloses a three-phase balance power supply system, a three-phase balance method of the three-phase balance system, as well as a modular power distribution cabinet with the three-phase balance power supply system. The power supply system comprises a breaker, an arrester module which is in electrical connection, and a central processor module, wherein the central processor module comprises a central processor, a touch screen which are electrically connected with each other, a zero wire current sensor used for detecting total zero sequence current of a power supply and electrically connected with the central processor, and a plurality of adjusting units; the central processor and the touch screen are electrically connected with each other; the three-phase balance method of the three-phase balance power supply system comprises the following steps: sending a command to collect a zero wire current value and all output current values by the central processor, then calculating to obtain an optimal load adjusting scheme, and carrying out the scheme by all the adjusting units according to instructions; the modular power distribution cabinet is provided with the three-phase balance power supply system, so that the modular power distribution cabinet has the three-phase balance function and the modular configuration function; the operation safety coefficient is improved; modules can be manufactured according to the requirements; the manufacture cost is lowered.
Description
Technical field
The present invention relates to power supply unit technical field, particularly relate to a kind of three-phase equilibrium electric power system and method and be provided with the modularization power distribution cabinet of this system.
Background technology
Be provided with electrical equipment and circuit thereof in power distribution cabinet, be used for distributing electric power energy, be referred to as motive power distribution center.They install the transformer station in electricity consumption concentration zones concentratedly, power distribution to subordinate's controller switching equipment of different location.Usual power distribution cabinet comprises rack, is provided with general supply in this rack.
Along with the fast development of technology and the application of profound level, more and more higher to the reliability requirement of power supply; Along with the continuous increase of equipment, the three-phase equilibrium problem of its distribution system also more and more causes the attention of management level.Excessive threephase load is uneven, the probability that power supply and UPS and uninterrupted power supply break down can be caused to increase, the normal operation of serious threat equipment.
The harm of three-phase imbalance comprises: the electric energy loss adding circuit; Add the electric energy loss of distribution transformer; Distribution transforming is exerted oneself minimizing; Distribution transforming produces zero-sequence current; Affect the safe operation etc. of power consumption equipment.Because absolute three-phase equilibrium is non-existent, always there is energy imbalance in various degree in actual three-phase system.When distribution transforming produce zero-sequence current, zero line namely have electric current by time, not only phase line is lossy, and zero line also produces loss, thus adds the loss of power network line.
For the three-phase imbalance problem of power distribution cabinet, the measure adopted at present mostly is dilatation.But existing power distribution cabinet adopts customized production situation, once specification cannot carry out dilatation or change after determining, later stage dilatation can only change power distribution cabinet, changing power distribution cabinet needs the replacing that has a power failure, and brings greatly difficulty to the dilatation in later stage.For the problem of three-phase imbalance, manual operation can also be adopted to adjust the mode of phase place to reach three-phase equilibrium, but existing power distribution cabinet is not easy to manual operation.
Summary of the invention
The first object of the present invention is to provide a kind of three-phase equilibrium electric power system, this electric power system can automatic monitoring three-phase equilibrium, and three-phase equilibrium can be carried out according to real-time load running situation and automatically adjust, electric power system is made to remain the running status of three-phase equilibrium, thus improve the coefficient of safety of operation, reduce the loss of power network line, there is energy-conservation effect.
For solving the problems of the technologies described above, technical scheme of the present invention is: city's electrical circuit breakers that a kind of three-phase equilibrium electric power system bag is electrically connected with civil power, also comprise: ATS diverter switch, the input of described ATS diverter switch is electrically connected described city electrical circuit breakers, and the output of described ATS diverter switch is electrically connected with some regulons for regulating threephase load to balance; Described regulon, each described regulon includes: the A phase switch be connected with three phase mains respectively, B phase switch and C phase switch, and respectively mutually described switch includes a transfer relay and one for detecting described transfer relay state of switch state sensor; Export circuit breaker, the input of described output circuit breaker is electrically connected three described transfer relays simultaneously, the output electrical connection load of described output circuit breaker; Described output circuit breaker is also electrically connected with one for detecting the output switch state sensor of its state; Output voltage sensor and output current transducer, be respectively used to detect output voltage and the output current of regulon described in this; Cell processor, the data collected for gathering the data of described output voltage sensor, described output current transducer and each described on off state transducer, and are transferred to central processing unit by described Cell processor; The regulating command also sent according to described central processing unit controls described output circuit breaker and each described transfer relay break-make; Neutral line current transducer, for detecting the general supply zero-sequence current of described electric power system, described neutral line current transducer is electrically connected with described central processing unit; Central processing unit, whether the data transmitted for the described zero-sequence current value that collects according to described neutral line current transducer and described Cell processor calculate threephase load and balance, and send described regulating command according to the result calculated to described Cell processor; Touch-screen, for realizing human-computer dialogue.
Optimal way is, regulon described in each is provided with a described Cell processor.
Optimal way is, four described regulons share a described Cell processor.
Optimal way is, each described regulon also comprises a temperature sensor, and described temperature sensor is electrically connected with described Cell processor.
Optimal way is, is connected with lightning arrester between described city electrical circuit breakers and described ATS diverter switch.
Optimal way is, described central processing unit is all communicated by RS485 or CAN communications protocol with each described Cell processor.
Optimal way is, the input of described ATS diverter switch is also connected with stand-by power supply by a UPS circuit breaker.
After adopting technique scheme, the invention has the beneficial effects as follows: because three-phase equilibrium electric power system of the present invention comprises central processing unit, for detecting the neutral line current transducer of general supply zero-sequence current, this neutral line current transducer is electrically connected with central processing unit; Some regulons, each regulon includes the A phase switch, B phase switch and the C phase switch that are connected with three phase mains respectively, and each phase switch includes a transfer relay and one for detecting transfer relay state of switch state sensor; For detecting each transfer relay on off operating mode and regulon voltage and current data and by the data upload that detects to the Cell processor of central processing unit.Central processing unit of the present invention carries out computing according to the parameter such as voltage, electric current of the zero-sequence current received, the load of each road, and judge whether threephase load balances, if during three-phase imbalance, optimum load handover scheme is matched according to operation result, and by above-mentioned handover scheme display on the touchscreen, after being confirmed by user, selecting of determining is cut instruction and send Cell processor to, the transfer relay break-make of the regulon needing to switch is controlled by Cell processor, thus complete the alternate switching of load, finally reach three-phase equilibrium.Therefore three-phase equilibrium electric power system of the present invention can keeping system be run all the time under three-phase equilibrium state, thus improves the coefficient of safety of system cloud gray model, reduces the loss of power network line.
Due to four described regulons same described Cell processor altogether, this structure provides cost savings while guarantee original function.
The second object of the present invention is the control method of the three-phase equilibrium providing a kind of three-phase equilibrium electric power system, and the method monitors three-phase equilibrium according to the data of real-time electric power system, and automatically can calculate best three-phase equilibrium Adjusted Option.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of method of three-phase equilibrium of three-phase equilibrium electric power system, comprises the following steps:
S10: the data gathering each described regulon: each described Cell processor gathers the data of each described on off state transducer, the data of described output voltage sensor and described output current transducer; And give described central processing unit by the data transfer of collection;
S20: calculation process: described central processing unit calculates three-phase average load current value PI according to the current data that Cell processor described in each transmits, PI=(IA+IB+IC)/3;
S30: judge to compare: 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 be on the occasion of, then illustrate that this phase load is bigger than normal; If PA, PB or PC are negative value, then illustrate that this phase load is less than normal;
S40: calculate coupling: in PA, PB or PC negative value item calculate all can equal on the occasion of may combine, adopt poll detect coupling; First coupling differs the single load terms within 3% with negative value item, if do not calculate again after two load terms are added and differ may combine within 3% with negative value item, then calculate after three load terms are added and differ may combine within 3% with negative value item, after all combinations matches complete, poll calculates on the occasion of subtracting each combination phase, minimum for result 5 combinations retained, remaining is deleted;
S50: Graphics Processing result: central processing unit by remaining 5 combination displays on the touchscreen, is selected by user and carries out manual confirmation;
S60: perform switching: the integrated mode confirmed according to user, first needs the relay on the occasion of item load of the described regulon adjusted to disconnect, is then connected by the relay of the negative value item of regulon described in this, complete the alternate switching of load;
S70: detect neutral line current: after execution switching completes, central processing unit gathers the numerical value of neutral line current transducer, if the numerical value of the neutral line current collected is not less than 1, repeats step S10 and S20, judge whether the numerical value of PA, PB and PC is less than 3%, if be less than 3%, exit adjustment program; If be still greater than 3%, then repeat step S10 to S70.
The third object of the present invention is to provide a kind of modularization power distribution cabinet, and this power distribution cabinet is provided with above-mentioned three-phase equilibrium electric power system, makes the present invention have the function keeping three-phase equilibrium; Modular arrangements of the present invention, enables user's customized module according to actual needs, is convenient to dilatation, also saves cost simultaneously.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of modularization power distribution cabinet, comprise standardized rack, be provided with above-mentioned three-phase equilibrium electric power system in described rack, the some described regulon in described three-phase equilibrium electric power system forms an integrated module; Integrated module described in several is provided with in described rack.
Optimal way is, four described regulons form a described integrated module, and each described integrated module is equipped with one for automatically disengaging the fault trip device of described rack, and described fault trip device is electrically connected with described Cell processor.
After adopting technique scheme, the invention has the beneficial effects as follows: because modularization three-phase equilibrium power distribution cabinet of the present invention comprises rack, because being provided with the integrated module of some modular arrangements in rack, power distribution cabinet of the present invention is enable to carry out customized module according to the actual needs of user, thus provide cost savings, also make the easy dilatation of the present invention.The integrated module of this power distribution cabinet comprises three-phase equilibrium electric power system simultaneously, makes power distribution cabinet have the self balancing function of three-phase, and when it runs, the loss of electrical network is low, and operating safety factor is high, and energy-saving effect is remarkable.Therefore the present invention possesses modular arrangements, three autobalances, output pre-terminated simultaneously, and can not have a power failure the function such as dilatation and maintenance.
Because every four described regulons form a described integrated module, each described integrated module is equipped with one for automatically disengaging the fault trip device of described rack, described fault trip device is electrically connected with described Cell processor, this configuration avoids a large amount of crimping workloads, later stage can very simply carry out adjusting and changing, and greatly reduces the possibility artificially occurring risk; When this structure can also make regulon break down and cause temperature too high, reacted to central processing unit by temperature sensor, thus improve coefficient of safety; When structure makes certain regulon break down, can rack be automatically disengaged simultaneously, thus avoid the continuation extension of fault.
In sum, three-phase equilibrium electric power system of the present invention and method and the modularization power distribution cabinet being provided with this system to solve in prior art electric power system three-phase imbalance and are difficult to the technical problems such as dilatation, the enough keeping systems of the present invention are run all the time under three-phase equilibrium state, thus improve the coefficient of safety of system cloud gray model, reduce the loss of power network line; Possess modular arrangements, three autobalances, output pre-terminated, can not have a power failure the function such as dilatation and maintenance simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation being provided with the modularization power distribution cabinet of 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 regulon of three-phase equilibrium electric power system of the present invention;
Fig. 5 is the flow chart of the three-phase equilibrium method of 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 object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment one:
As shown in Figure 2, a kind of three-phase equilibrium electric power system, comprises the circuit breaker be electrically connected with civil power, ATS diverter switch, neutral line current transducer, central processing unit, touch-screen 2 and regulon; Wherein the input of ATS diverter switch is connected with circuit breaker, and the input of ATS diverter switch is also connected with stand-by power supply by a UPS circuit breaker.
As Fig. 2 and Fig. 4 jointly shown in, the output of ATS diverter switch is electrically connected with multiple regulon for regulating threephase load to balance, and each regulon includes:
Be located at the A phase switch in three phase mains A phase, be located at the B phase switch in three phase mains B phase and be located at the C phase switch in three phase mains C phase.
Wherein A phase switch comprises A phase relay and A phase on off state transducer, and A phase relay is electrically connected with Cell processor, is namely controlled break-make by Cell processor; A phase on off state transducer is electrically connected with Cell processor, namely be correspond to the state value of A phase relay break-make by Cell processor collection.
Wherein B phase switch comprises B phase relay and B phase on off state transducer, and B phase relay is electrically connected with Cell processor, is namely controlled break-make by Cell processor; B phase on off state transducer is electrically connected with Cell processor, namely be correspond to the state value of B phase relay break-make by Cell processor collection.
Wherein C phase switch comprises C phase relay and C phase on off state transducer, and C phase relay is electrically connected with Cell processor, is namely controlled break-make by Cell processor; C phase on off state transducer is electrically connected with Cell processor, namely be correspond to the state value of C phase relay break-make by Cell processor collection.
Above-mentioned A phase switch, B phase switch and C phase switch are jointly with output voltage sensor, output current transducer with export circuit breaker and be connected; Wherein output voltage sensor and output current transducer are all electrically connected with Cell processor, and the output voltage and the output current that are about to this regulon detected are uploaded to Cell processor; Wherein export circuit breaker and be also provided with an output switch state sensor, this output circuit breaker and output switch state sensor are all electrically connected with Cell processor.
Each regulon of the present embodiment is equipped with a Cell processor, and Cell processor all selects processor of single chip computer.
As Fig. 2 and Fig. 4 jointly shown in, the zero line that the neutral line current transducer of this enforcement is located at general supply gathers zero-sequence current, and zero-sequence current is transferred to the central processing unit electrical connection be connected electrically.
As Fig. 2 and Fig. 4 jointly shown in, the central processing unit of the present embodiment is electrically connected with the Cell processor of each regulon, and central processing unit is communicated by the communications protocol such as RS485 or CAN with regulon.Whether the data that the zero-sequence current value that this central processing unit collects according to neutral line current transducer, Cell processor transmit calculate threephase load and balance.If threephase load is uneven, central processing unit computing matches optimum load handover scheme, and is presented at by load handover scheme on the touch-screen 2 that is electrically connected with central processing unit, confirms load handover scheme by user.This touch-screen 2 is for realizing human-computer dialogue, and this can notify user by forms such as note, phone, networks.
As shown in Figure 4, each regulon of the three-phase power supply system of the present embodiment also comprises a temperature sensor, and this temperature sensor is electrically connected with Cell processor.This temperature sensor is electrically connected with Cell processor; This temperature sensor, for detecting the temperature of this regulon, avoids some dangerous.
As shown in Fig. 2, Fig. 4 and Fig. 5, in use, under initial condition, module gives tacit consent to the appointment phase be operated in A phase, B phase and C phase three to the three-phase equilibrium electric power system of the present embodiment, be specially: the A phase relay closure state of the first regulon, A phase is acquiescence phase; The B phase relay closure state of the second regulon, B phase is acquiescence phase; The C phase relay closure state of the 3rd regulon, C phase is acquiescence phase; The A phase relay closure state of the 4th regulon, namely A phase is acquiescence phase.
Embodiment two:
The present embodiment is substantially identical with embodiment one, and difference is:
As shown in Figure 3 and Figure 4, four regulons of the three-phase equilibrium electric power system of the present embodiment share a Cell processor.
Such as: the A phase relay of the first regulon and A phase on off state transducer, B phase relay and B phase on off state transducer, C phase relay and C phase on off state transducer and export circuit breaker and output switch state sensor; The A phase relay of the second regulon and A phase on off state transducer, B phase relay and B phase on off state transducer, C phase relay and C phase on off state transducer and export circuit breaker and output switch state sensor; The A phase relay of the 3rd regulon and A phase on off state transducer, B phase relay and B phase on off state transducer, C phase relay and C phase on off state transducer and export circuit breaker and output switch state sensor; The A phase relay of the 4th regulon and A phase on off state transducer, B phase relay and B phase on off state transducer, C phase relay and C phase on off state transducer and export circuit breaker and output switch state sensor is all electrically connected with a Cell processor.Because four regulons of the present embodiment share a Cell processor, thus provide cost savings.
The three-phase equilibrium electric power system of above-described embodiment carries out the control method of three-phase equilibrium, as shown in Figure 5, comprises the following steps:
S10: the data gathering each regulon: each Cell processor all gathers the data of A phase on off state transducer, B phase on off state transducer and C phase on off state transducer, output switch state sensor, also gathers the data of output voltage sensor and output current transducer; And by the data transfer of collection to central processing unit; The regulon coding that each numerical value that each regulon of the present invention is gathered is corresponding with it, passes to central processing unit together; After central processing unit receives numerical value, according to different regulon coded memories or deal with data.
S20: calculation process: central processing unit calculates three-phase average load current value PI according to the current data that unit processor transmits, PI=(IA+IB+IC)/3.
S30: judge to compare: 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 be on the occasion of, then illustrate that this phase load is bigger than normal; If PA, PB or PC are negative value, then illustrate that this phase load is less than normal; Be specially: i.e. PA>0, this A phase needs to reduce load; PB>0, this B phase needs to reduce load; PC>0, this C phase needs to reduce load; If add phase for negative value is indicated as tune: i.e. PA<0, this A phase needs to increase load; PB<0, this B phase needs to increase load; PC<0, this C phase needs to increase load.
S40: calculate coupling: in PA, PB or PC negative value item calculate all can equal on the occasion of may combine, adopt poll detect coupling; First coupling differs the single load terms within 3% with negative value item, if do not calculate again after two load terms are added and differ may combine within 3% with negative value item, then calculate after three load terms are added and differ may combine within 3% with negative value item, after all combinations matches complete, poll calculates on the occasion of subtracting each combination phase, minimum for result 5 combinations retained, remaining is deleted.
S50: Graphics Processing result: central processing unit by remaining 5 combination displays on the touchscreen, is selected by user and carries out manual confirmation; The user of the present embodiment selects adjustment mode to be: the load of the A phase of certain regulon is switched to C phase, i.e. PA>0, this A phase needs to reduce load; PC<0, this C phase needs to increase load.
S60: perform switching: the integrated mode confirmed according to user, first needs the relay on the occasion of item load of the regulon adjusted to disconnect, is then connected by the relay of the negative value item of this regulon, complete the alternate switching of load.Such as: the A phase relay of the first regulon is in closure state (B phase relay and C in succession device state are all in off-state), i.e. three phase mains A phase powering load.The B phase relay of the second regulon is in closure state (A phase relay and C in succession device state are all in off-state), i.e. three phase mains B phase powering load.The C phase relay of the 3rd regulon is in closure state (A phase relay and B in succession device state are all in off-state), i.e. three phase mains C phase powering load.The A phase relay of the 4th regulon is in closure state (B phase relay and C in succession device state are all in off-state), i.e. three phase mains A phase powering load ... the load of the A phase of the three phase mains of load handover scheme-the first regulon that user confirms from touch-screen by central processing unit switches to C phase-convert instruction to, and passes to Cell processor.Cell processor performs according to instruction.Be specially: the signal of telecommunication disconnected to the first regulon A phase relay, then detect the state value of A phase on off state transducer, after detecting that A phase relay disconnects corresponding state value; Cell processor gives the signal of telecommunication that the C phase relay of the first regulon is closed again, and then detect the state value of C phase on off state transducer, after detecting and correspond to the closed state value of C phase relay, learn that the first regulon completes the alternate switching of load, whole switching time, within 10ms, therefore can not affect electric power system load and normally run.
S70: detect neutral line current: after execution switching completes, central processing unit gathers the numerical value of neutral line current transducer, if the numerical value of the neutral line current collected is not less than 1, repeats step S10 and S20, judge whether the numerical value of PA, PB and PC is less than 3%, if be less than 3%, exit adjustment program; If be still greater than 3%, then repeat step S10 to S70.
From the above, the present invention compared with prior art has the following advantages:
1., can autobalance threephase load balance, therefore the present invention can reduce the uneven and electric energy loss of the line energy loss that causes and distribution transformer of the three characteristics of the middle term, and then reaches the object of economize on electricity.
2., can reduce, the situations such as the line load that three characteristics of the middle term laod unbalance causes is excessive, the distribution transforming heating caused, thus improve the fail safe of distribution system.
3., the efficiency of motor can be improved, improve economy and the fail safe of motor.
4., can electrical network be purified, improve the fail safe of electrical network, save electric power, reach energy-conservation object.
Embodiment three:
As shown in Figure 1, a kind of modularization power distribution cabinet being provided with three-phase equilibrium electric power system, comprises standardized rack 1, and four regulons be provided with in this rack 1 in three-phase equilibrium electric power system form an integrated module 3; Multiple integrated module 3 is provided with in this rack 1.
An integrated module 3 of the present embodiment is made up of four regulons.Each regulon is equipped with one for automatically disengaging the fault trip device of rack 1 simultaneously, and this fault trip device is electrically connected with Cell processor.
The every phase load output of the present embodiment is all electrically connected with load by plugging power-source connector, and wherein plugging power-source connector selects aviation formula banjo.
As shown in Figure 1, each regulon of this enforcement comprises 6 roads or 9 tunnel loads export, and four regulons form an integrated module 3, and this integrated module 3 is modular arrangements, and therefore each integrated module 3 runs independent of other integrated modules 3.When an integrated module 3 breaks down or damages, do not affect the normal operation of other integrated modules 3.Therefore the power distribution cabinet of this enforcement can carry out dilatation and maintain and replace easily.The fault trip device of the present embodiment makes each integrated module 3 all have automatic spring function, when integrated module 3 breaks down, after fault trip device obtains signal from Cell processor, by integrated module 3 from rack 1 automatic spring, it is made to automatically disengage rack 1, thus avoid fault continuation expansion, the operation that therefore power distribution cabinet of the present invention can be safe and reliable.
When the temperature of certain integrated module 3 of power distribution cabinet of the present invention is too high, after Cell processor collects this temperature value, can the fault trip device action of control integration module 3, make it eject rack 1; Or make the breaker actuation be electrically connected with civil power of this integrated module 3, thus improve coefficient of safety of the present invention.
The three-phase equilibrium electric power system of the present embodiment also can carry out three-phase equilibrium adjustment according to flow process as shown in Figure 5 in addition, therefore power distribution cabinet of the present invention can reduce the uneven and electric energy loss of the line energy loss that causes and distribution transformer of the three characteristics of the middle term, and then reaches the object of economize on electricity.The situations such as power distribution cabinet of the present invention can reduce, and the line load that three characteristics of the middle term laod unbalance causes is excessive, the distribution transforming heating caused, thus improve the fail safe of distribution system.Power distribution cabinet of the present invention can improve the efficiency of motor, improves economy and the fail safe of motor.Power distribution cabinet of the present invention can purify electrical network, improves the fail safe of electrical network, saves electric power, reaches energy-conservation object.
Power distribution cabinet of the present invention can be equipped with the auxiliary function modules such as isolating transformer module, UPS module, meterage module, precision air conditioner module, is the protection that distribution system is safer.
Forming an integrated module 3 by four regulons is the preferred embodiment of the present invention, and in practical application, technical staff arbitrarily can combine according to the structure of power distribution cabinet and power supply needs.
The above preferred embodiment of the present invention; not in order to limit the present invention; all any amendments done within the spirit and principles in the present invention, etc. the improvement etc. of same modularization three-phase equilibrium power distribution cabinet structure, all should be included within protection scope of the present invention.
Claims (10)
1. three-phase equilibrium electric power system, comprises the city's electrical circuit breakers be electrically connected with civil power, it is characterized in that, also comprise:
ATS diverter switch, the input of described ATS diverter switch is electrically connected described city electrical circuit breakers, and the output of described ATS diverter switch is electrically connected with some regulons for regulating threephase load to balance;
Described regulon, each described regulon includes:
The A phase switch be connected with three phase mains respectively, B phase switch and C phase switch, respectively mutually described switch includes a transfer relay and one for detecting described transfer relay state of switch state sensor;
Export circuit breaker, the input of described output circuit breaker is electrically connected three described transfer relays simultaneously, the output electrical connection load of described output circuit breaker; Described output circuit breaker is also electrically connected with one for detecting the output switch state sensor of its state;
Output voltage sensor and output current transducer, be respectively used to detect output voltage and the output current of regulon described in this;
Cell processor, the data collected for gathering the data of described output voltage sensor, described output current transducer and each described on off state transducer, and are transferred to central processing unit by described Cell processor; The regulating command also sent according to described central processing unit controls described output circuit breaker and each described transfer relay break-make;
Neutral line current transducer, for detecting the general supply zero-sequence current of described electric power system, described neutral line current transducer is electrically connected with described central processing unit;
Central processing unit, whether the data transmitted for the described zero-sequence current value that collects according to described neutral line current transducer and described Cell processor calculate threephase load and balance, and send described regulating command according to the result calculated to described Cell processor;
Touch-screen, for realizing human-computer dialogue.
2. three-phase equilibrium electric power system according to claim 1, is characterized in that, regulon described in each is provided with a described Cell processor.
3. three-phase equilibrium electric power system according to claim 1, is characterized in that, four described regulons share a described Cell processor.
4. the three-phase equilibrium electric power system according to Claims 2 or 3, is characterized in that, each described regulon also comprises a temperature sensor, and described temperature sensor is electrically connected with described Cell processor.
5. three-phase equilibrium electric power system according to claim 4, is characterized in that, is connected with lightning arrester between described city electrical circuit breakers and described ATS diverter switch.
6. three-phase equilibrium electric power system according to claim 5, is characterized in that, described central processing unit is all communicated by RS485 or CAN communications protocol with each described Cell processor.
7. three-phase equilibrium electric power system according to claim 6, is characterized in that, the input of described ATS diverter switch is also connected with stand-by power supply by a UPS circuit breaker.
8. the three-phase equilibrium control method of three-phase equilibrium electric power system according to claim 1, is characterized in that, comprise the following steps:
S10: the data gathering each described regulon: each described Cell processor gathers the data of each described on off state transducer, the data of described output voltage sensor and described output current transducer; And give described central processing unit by the data transfer of collection;
S20: calculation process: described central processing unit calculates three-phase average load current value PI according to the current data that Cell processor described in each transmits, PI=(IA+IB+IC)/3;
S30: judge to compare: 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 be on the occasion of, then illustrate that this phase load is bigger than normal; If PA, PB or PC are negative value, then illustrate that this phase load is less than normal;
S40: calculate coupling: in PA, PB or PC negative value item calculate all can equal on the occasion of may combine, adopt poll detect coupling; First coupling differs the single load terms within 3% with negative value item, if do not calculate again after two load terms are added and differ may combine within 3% with negative value item, then calculate after three load terms are added and differ may combine within 3% with negative value item, after all combinations matches complete, poll calculates on the occasion of subtracting each combination phase, minimum for result 5 combinations retained, remaining is deleted;
S50: Graphics Processing result: central processing unit by remaining 5 combination displays on the touchscreen, is selected by user and carries out manual confirmation;
S60: perform switching: the integrated mode confirmed according to user, first needs the relay on the occasion of item load of the described regulon adjusted to disconnect, is then connected by the relay of the negative value item of regulon described in this, complete the alternate switching of load;
S70: detect neutral line current: after execution switching completes, central processing unit gathers the numerical value of neutral line current transducer, if the numerical value of the neutral line current collected is not less than 1, repeats step S10 and S20, judge whether the numerical value of PA, PB and PC is less than 3%, if be less than 3%, exit adjustment program; If be still greater than 3%, then repeat step S10 to S70.
9. modularization power distribution cabinet, comprises standardized rack, it is characterized in that, is provided with the three-phase equilibrium electric power system described in claim 1 to 7 in described rack, and the some described regulon in described three-phase equilibrium electric power system forms an integrated module; Integrated module described in several is provided with in described rack.
10. modularization power distribution cabinet according to claim 9, it is characterized in that, four described regulons form a described integrated module, each described integrated module is equipped with one for automatically disengaging the fault trip device of described rack, and described fault trip device is electrically connected with described Cell processor.
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| WO2022073321A1 (en) * | 2020-10-10 | 2022-04-14 | 维谛技术(西安)有限公司 | Phase adjustment method and apparatus based on cabinet level monitoring device cluster, and device |
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