CN105978004A - System for automatically adjusting balance of three-phase loads of branch unit by utilizing integral current method or electric energy method - Google Patents
System for automatically adjusting balance of three-phase loads of branch unit by utilizing integral current method or electric energy method Download PDFInfo
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- CN105978004A CN105978004A CN201610471170.7A CN201610471170A CN105978004A CN 105978004 A CN105978004 A CN 105978004A CN 201610471170 A CN201610471170 A CN 201610471170A CN 105978004 A CN105978004 A CN 105978004A
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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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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention relates to a system for automatically adjusting balance of three-phase loads of a branch unit by utilizing an integral current method or an electric energy method, belonging to the field of power distribution. Real-time loads of A, B and C phase of three-phase branches are respectively acquired on various three-phase branches of a zone-area transformer; the real-time loads of various phases are respectively integrated; according to a pre-set time slot set value, load integral value information of various phase lines within corresponding time slots is intercepted; according to the load integral value information of various phase lines, loads of various phase lines in the three-phase branches are respectively calculated by taking each three-phase branch as one sub-unit system; according to the obtained unbalance rate, the unbalance condition of three-phase loads in various three-phase branches is judged; the balance among loads of various phase lines in the three-phase branches is adjusted; therefore, complete balance of loads of various phases in various three-phase branches of the zone-area transformer is realized; the balance of three-phase loads of a main loop of a zone-area power distribution network is realized; and thus, the purposes of reducing line loss and improving line end low voltage are really realized.
Description
Technical field
The invention belongs to power distribution equipment field, particularly relate to one and can make three-phase power line alternate load balancing distribution or reduce unbalanced device.
Background technology
Present power system (or referred to as electric power system, lower same), especially low-voltage network, commonly used three-phase four-wire power supply pattern, owing to most of power load (such as the household electrical appliance such as air-conditioning, electric refrigerator or lighting etc.) of resident is single-phase load, and the power consumption of each resident, electricity consumption time etc. all differ, the phenomenon that result in low-voltage network three-phase load current imbalance is on the rise, and has a strong impact on the line loss of low-voltage distribution and the voltage of end.
As an overall electric power system, in three-phase four-wire power supply circuit, sharing of load equilibrium between each phase line is extremely necessary, this is not only related to the phase line current equalization problem of three-phase power line, also relates to reduce all many problems such as line loss, the economical operation of electrical network and safety.
Due to the imbalance of distribution transformer three-phase load electric current, a certain phase load is bigger than normal, and the line loss of this phase supply line can be made to increase；Meanwhile, this phase line works under heavy load, both can affect the operation safety of transformator, reduce again the power supply capacity of transformator；Additionally, if the three-phase load current unbalance factor of transformator is the biggest, then the neutral current of system is the biggest, if low voltage electric network is chronically at unbalanced state, can blow the neutral conductor time serious, affect the use safety of low voltage electric network.
So, the equilibrium assignment of phase specific electric load in three-phase power line, economy, the safe operation to whole power distribution network, and ensure the reliability of controller switching equipment, it is all the most crucial.
At present, three-phrase burden balance automatic adjustment system commercially is all by phase-change switch (device) the three-phrase burden balance dimerous automatic adjustment system on the acquisition terminal (main control computer) being arranged on platform district major loop and branched line.Its operation principle is by the phase line current information in acquisition terminal (main control computer) picking platform district major loop, gathered the current information of place phase line unit loads in branch road by phase-change switch (device) and be uploaded to system platform or terminal (main control computer), calculated phase line current meansigma methods and the unbalance factor of platform district major loop by system platform or terminal (main control computer), and make the Adjusted Option of three-phrase burden balance with this.
There are two serious problems in technique scheme: one in actual applications, in platform district, the balance of power distribution network three-phase load is to be determined by the balance of each branch path three-phase load, the only balancing the load in each branch path in platform district, being only the balance of platform district power distribution network, the major loop in Qi Tai district naturally also can balance.But only major loop balancing the load, the branch path load in platform district power distribution network not necessarily balances；If the balancing the load situation only in accordance with platform district major loop, adjust the balancing the load of platform district major loop, the imbalance likely adjusted on the contrary by the load of this counter-balanced branch path the most, this has just run counter to the objective (line loss reducing and improve line end low-voltage) of balancing.The power distribution network only making major loop load also reach balance by the branch path balancing the load in platform district power distribution network balances, and is only real power distribution network balance.They are two years old, on market, existing three-phrase burden balance automatic adjustment system all uses average current model, i.e. according to the current information gathered, calculate average current and unbalance factor with addition and subtraction averaging method again, and determine the Adjusted Option of three-phrase burden balance, and the current information in electrical network is not only relevant to size, also relevant with the time, so this algorithm is the most inaccurate, it is impossible to adjust, for three-phase load, the foundation that offer science is correct, the most just cannot ensure that platform district power distribution network three-phrase burden balance adjusts effectively.
Summary of the invention
The technical problem to be solved is to provide a kind of integration current method or electric energy method branch units three-phrase burden balance automatic adjustment system, it is on the basis of original three-phrase burden balance automatic adjustment system, each phase line of each branch path installs additional monophase current collecting unit, or single-phase electric energy collecting unit, or current type and Electric energy type residual current circuit breaker, phase line current (electric energy) information in branch path is gathered by it, and each be a sub-cellular system with branch path, adjust the balance of its three-phase load, thus realize the balance of platform district power distribution network major loop three-phase load, really realize line loss reducing and improve the purpose of line end low-voltage, three-phrase burden balance adjustment technology is made to step on a new level, effectively adjust the science of providing for platform district power distribution network three-phrase burden balance it is effectively guaranteed that.
A kind of integration current method of offer or electric energy method branch units three-phrase burden balance automatic adjustment system are provided, it is included on each three-phase separate branch road of platform district transformator and a three-phase load acquisition module is set, for gathering the size of each phase line load in this three-phase separate branch road, and by the load of each detected phase line, it is sent to a Ge Tai district terminal；Described platform district terminal is according to the payload of each phase line in each three-phase separate branch road, it is judged that the uneven situation of three-phase load in each three-phase separate branch road, by automatic phase-change switch, carries out the conversion of load phase place；It is characterized in that:
Described three-phase load acquisition module, including three single-phase load collecting units, three described single-phase load collecting units are combined into one, and constitute a three-phase load acquisition module；
Described three-phase load acquisition module, gathers the Real-time Load of A, B, C three-phase of place three-phase separate branch road respectively, and is sent to load integral unit；
Each phase Real-time Load is integrated processing by described load integral unit respectively, obtains the load integration information of each phase line, and the load integration information of each phase line is delivered to signal processing unit；
Described signal processing unit, according to the time period setting value preset, intercepts the load integrated value information of each phase line of corresponding time period, and is uploaded to platform district terminal by communication unit；
Described platform district terminal, according to the load integrated value information of each phase line in each three-phase separate branch road, it is a sub-cellular system with each three-phase separate branch road, calculate the size of each phase line load in this three-phase separate branch road respectively, according to the unbalance factor obtained, judge the uneven situation of three-phase load in each three-phase separate branch road, the balance between each phase line load is adjusted in this three-phase separate branch road by automatic phase-change switch, to realize whole balances of each phase load in each three-phase separate branch road of platform district transformator, and then realize the balance of platform district power distribution network major loop three-phase load, really realize line loss reducing and improve the mesh of line end low-voltage.
Concrete, described three-phase load acquisition module is three monophase current collecting units；Three described monophase current collecting units, gather A, B, C three-phase Real-time Load electric current of place three-phase separate branch road respectively, deliver to load current integral unit, each phase Real-time Load electric current is integrated processing by load current integral unit respectively, obtain the current integration values of each phase line, and the current integration values of each phase line is delivered to signal processing unit, signal processing unit is according to the time period preset or time interval setting value, intercept the current integration values of each phase line in corresponding time period or time interval, and be uploaded to platform district terminal by communication unit；
Described platform district terminal, it is a sub-cellular system with each three-phase separate branch road, according to the current integration value information of each phase line in each subelement system, calculate the size of each phase line load current in this subelement system, according to the unbalance factor obtained, judge the uneven situation of three-phase load in each subelement system, by automatic phase-change switch, adjust the balance between each phase line load in the three-phase separate branch road of this subelement system.
Concrete, described three-phase load acquisition module is three single-phase electric energy collecting units；Three described single-phase electric energy collecting units, gather the real-time electric energy of A, B, C three-phase load of place three-phase separate branch road respectively, obtain the energy value information of each phase line, and the energy value information of each phase line is delivered to signal processing unit, signal processing unit is according to the time period preset or time interval setting value, intercept the energy value information of each phase line in corresponding time period or time interval, and be uploaded to platform district terminal by communication unit；
Described platform district terminal, it is a sub-cellular system with each three-phase separate branch road, according to the energy value information of each phase line in each subelement system, judge the uneven situation of three-phase load in each subelement system, obtain the unbalance factor of this subelement system, by automatic phase-change switch, adjust the balance between each phase line load in the three-phase separate branch road of this subelement system.
Further, after described load integral unit receives current instantaneous load value, according to equal interval sampling rule, in each time quantum, read once current instantaneous load value, after completing the Integral Processing to load, and deliver to load memorizer.
Further, described communication unit is 485 communications interface units, wireless or carrier communication unit.
Further, described three-phase load acquisition module is arranged on each three-phase separate branch road；Or, it is arranged in the residual current circuit breaker of each three-phase separate branch road, constitutes three-phase electricity streaming or Electric energy type residual current circuit breaker.
nullBranch units three-phrase burden balance automatic adjustment system described in technical scheme，On the basis of original three-phase load automatic leveling balance system，On each three-phase separate branch road of platform district transformator，Install three-phase load acquisition module respectively additional，Described three-phase load acquisition module is three monophase current collecting units、Three single-phase electric energy collecting units、Three-phase electricity streaming or Electric energy type residual current circuit breaker，The current integration being gathered each phase line in corresponding three-phase separate branch road by it or the energy information of each phase line，Use the means that integration current method or electric energy method calculate as three-phrase burden balance and adjust，And be a sub-cellular system with each branch path，Adjust the balance of its three-phase load，To overcome existing average current model cannot accurately reflect the defect of load condition in power network line，Can correctly reflect the true load condition of each phase line in electrical network three-phase line，Adjust for three-phrase burden balance and foundation accurately is provided，Realize the real balance of platform district power distribution network three-phase load and effectively adjust.
Compared with the prior art, the invention have the advantage that
1. use the means that integration current method or electric energy method calculate as three-phrase burden balance and adjust, average current model can be overcome cannot to accurately reflect the defect of load condition in power network line, science can correctly reflect the load condition in power network line, adjusting for three-phrase burden balance provides foundation accurately；
2. in the case of can not changing the electronic type residual current circuit breaker adjusted in existing balancing system, existing district's power distribution network branch path installs three-phase load acquisition module additional, the specific electric load information of each phase line in each branch path in picking platform district, the needs of three-phrase burden balance automatic adjustment system can be met, solve again the installing space deficiency in existing power distribution network JP cabinet and the cost of investment problem in distribution network transform；
3. with the three-phase electric energy formula residual current circuit breaker of three monophase current collecting units, in addition to there is the general utility functions of conventional residual current circuit breaker, the current integration information of three-phase load can also be provided for three-phrase burden balance automatic adjustment system, adjust the foundation providing correct for three-phrase burden balance.
Accompanying drawing explanation
Fig. 1 is the system structure schematic diagram of the present invention；
Fig. 2 is three-phase load acquisition module of the present invention, current integration unit, signal processing unit, the circuit unit structural representation of communication unit.
Phase-change switch during 1A1 1AN is A phase line in figure, 1B1 1BN is the phase-change switch in B phase line, and 1C1 1CN is the phase-change switch in C phase line.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings.
In Fig. 1, technical scheme provides a kind of integration current method or electric energy method branch units three-phrase burden balance automatic adjustment system, it is included on each three-phase separate branch road of platform district transformator and a load current acquisition module is set, for gathering the size of each phase line load in this three-phase separate branch road, and by the payload of each detected phase line, it is sent to a Ge Tai district terminal；Described platform district terminal is according to the payload of each phase line in each three-phase separate branch road, it is judged that the uneven situation of three-phase load in each three-phase separate branch road, by automatic phase-change switch, carries out the conversion of load phase place；Its inventive point is:
Described load acquisition module, including three single-phase load collecting units, three described single-phase load collecting units are combined into one, and constitute a three-phase load acquisition module.
Why the technical program uses is combined into one three single-phase load collecting units, constitutes the mode of a three-phase load sampling module, is that internal structural space based on existing JP cabinet is limited and a solution of taking.
Distribution transformer integrated power distribution cabinet is called for short JP cabinet, and along with deepening continuously of upgrade of rural power grids, substantial amounts of JP cabinet is applied in rural power line and each power distribution station.JP cabinet be for adapt to countryside low-voltage electric distribution device standardization, miniaturization, the requirement of outdoor type and design, it integrate distribution, measures, protects (overload, short circuit, leak electricity), capacitance reactive compensation.
Owing to existing JP cabinet is an approved product, its inner space is limited, in limited inner space, it is impossible to accommodate three independent single-phase load collecting units, so have employed, three single-phase load collecting units are combined into one, constitute the structural models of a three-phase load acquisition module.
Due in actual table district low-voltage network, especially in three-phase separate branch road in the case of three-phase load unbalance, significantly, load current in each phase line, current value is unequal, particularly when in order to adjust in three-phase separate branch road the balance between each phase line load, must individually measure the load current in each phase line, according to the difference between each phase line load, judge the uneven situation of three-phase load in each three-phase separate branch road, thus be balanced adjusting to the three-phase load of each branch path, here it is the physical meaning of the balancing of each phase load in each three-phase separate branch road of platform district transformator.
In existing three-phrase burden balance automatic adjustment system, it is all to use average current model to judge the load between each phase line, i.e. according to the current information of each phase line gathered, the laod unbalance rate between the average current of each phase line and each phase line is calculated again with plus-minus averaging method, and determine the Adjusted Option of three-phrase burden balance with this, and the current information in electrical network was determined by size and time, so this plus-minus average current algorithm is the most inaccurate, offer science cannot be adjusted for three-phase load, correct foundation, the most just cannot ensure that platform district power distribution network three-phrase burden balance adjusts effectively.
In the technical program, described three-phase load acquisition module, gather the Real-time Load of A, B, C three-phase of place three-phase separate branch road respectively, and it is sent to load integral unit, each phase Real-time Load is integrated processing by load integral unit respectively, obtain the load integration information of each phase line, and the load integration information on each phase road is delivered to signal processing unit, signal processing unit is according to the time period setting value preset, intercept the load integrated value information of each phase line of corresponding time period, and be uploaded to platform district terminal by communication unit.
Described platform district terminal, according to the load integrated value information of each phase line in each three-phase separate branch road, it is a sub-cellular system with each three-phase separate branch road, calculate the unbalance factor of each phase line load in this three-phase separate branch road respectively, according to the unbalance factor obtained, judge the uneven situation of three-phase load in each three-phase separate branch road, the balance between each phase line load is adjusted in this three-phase separate branch road by automatic phase-change switch, to realize whole balances of each phase load in each three-phase separate branch road of platform district transformator, and then realize the balance of platform district power distribution network major loop three-phase load, really realize line loss reducing and improve the mesh of line end low-voltage.
For the three-phase separate branch road concrete to certain, if A, B, C three-phase Real-time Load phase line current of its three-phase separate branch road represents, then, in the technical program, described three-phase load sampling module is three monophase current sampling units；This three-phase current sampling module can use and be respectively provided with single-phase CT on A, B, C three-phase and realize.
In the technical program, described three-phase current sampling module, gather the A of place three-phase separate branch road respectively, B, C three-phase Real-time Load electric current, deliver to load current integral unit, each phase Real-time Load electric current is integrated processing by load current integration module respectively, obtain the phase line current integrated value of each phase line, and the current integration values of each phase line is delivered to signal processing unit, signal processing unit is according to the time period preset or time interval setting value, intercept the current integration values of each phase line in corresponding time period or time interval, and it is uploaded to platform district terminal by communication module；Described platform district terminal, it is a sub-cellular system with each three-phase separate branch road, according to the current integration value information of each phase line in each subelement system, calculate the unbalance factor of each phase line load current in this subelement system, according to the unbalance factor obtained, judging the uneven situation of three-phase load in each subelement system, root passes through automatic phase-change switch, adjusts the balance between each phase line load in the three-phase separate branch road of this subelement system.
Further, after described load integration module receives current instantaneous load value, according to equal interval sampling rule, in each time quantum, read once current instantaneous load value, complete the Integral Processing to load, and deliver to load memorizer.
Owing to active energy is voltage, the integration of amp product in the t time, utilize this feature, existing numeral single-phase electric energy meter can be used completely, the information on load of each phase line is provided.
Then in the technical program, for the three-phase separate branch road concrete to certain, if A, B, C three-phase Real-time Load electric energy of each phase of its three-phase separate branch road represents, described three-phase load acquisition module is three single-phase electric energy collecting units；This three-phase electric energy acquisition module can use be respectively provided with on A, B, C three-phase numeral single-phase electric energy meter realize.
In the technical program, described three-phase electric energy sampling module, gather the real-time electric energy of A, B, C three-phase load of place three-phase separate branch road respectively, obtain the energy value information of each phase line, and signal processing unit is delivered in the energy value of each phase line, signal processing unit, according to the time period preset or time interval setting value, intercepts the energy value information of each phase line loop in corresponding time period or time interval, and is uploaded to platform district terminal by communication module；Described platform district terminal, it is a sub-cellular system with each three-phase separate branch road, according to the energy value information of each phase line in each subelement system, calculate the electric energy unbalance factor of each phase line in this subelement system, according to the unbalance factor obtained, judge the uneven situation of three-phase load in each subelement system, by automatic phase-change switch, adjust the balance between each phase line load in the three-phase separate branch road of this subelement system.
In the case of maybe changing the electronic type residual current circuit breaker adjusted in existing balancing system for newly-built circuit, described three-phase load sampling module can also be arranged in the electronic type residual current circuit breaker of each three-phase separate branch road, constitute current type or Electric energy type residual current circuit breaker, it current integration gathering each phase line in corresponding three-phase separate branch road or energy information.
Further, the communication modes in the technical program can be 485 communications interface units, wireless or carrier communication unit.
System shown in Fig. 1, its load collecting unit 1 to load collecting unit N, and the communication between platform district terminal use 485 communication interface patterns；Automatically the communication between phase-change switch 1A1-1AN, 1B1-1BN, 1C1-1CN and platform district terminal, uses wireless or carrier communication pattern.
nullBranch units three-phrase burden balance automatic adjustment system described in technical scheme，On the basis of original three-phase load automatic leveling balance system，On each three-phase separate branch road of platform district transformator，Install three-phase current acquisition module respectively additional、Three-phase electric energy acquisition module、Three-phase electricity streaming or Electric energy type residual current circuit breaker，The current integration being gathered each phase line in corresponding three-phase separate branch road by it or energy information，Use the means that integration current method or electric energy method calculate as three-phrase burden balance and adjust，And be a sub-cellular system with each branch path，Adjust the balance of its three-phase load，To overcome average current model cannot accurately reflect the defect of load condition in power network line，Can correctly reflect the true load condition of each phase line in electrical network three-phase line，Adjust for three-phrase burden balance and foundation accurately is provided，Realize the real balance of platform district power distribution network three-phase load and effectively adjust.
In Fig. 2, three-phrase burden balance automatic adjustment system described in the technical program, single-phase load collecting unit is used to gather the A of place three-phase separate branch road respectively, B, the Real-time Load of C three-phase, and it is sent to load integral unit, each phase Real-time Load is integrated processing by load integral unit respectively, obtain the load integration information of each phase line, and the load integration information of each phase line is delivered to signal processing unit, signal processing unit is according to the time period setting value preset, intercept the phase specific electric load integrated value information in each phase loop of corresponding time period, and it is uploaded to platform district terminal by communication unit.
The integration current method (electric energy method) that the technical program is used is as shown in the table with the contrast when calculating uneven situation or the unbalance factor of three-phase load of the existing average current model:
Note: in upper table, T represents power frequency period.
From upper table institute column data, the integration current method (electric energy method) that the technical program is used is compared with existing average current model, when calculating uneven situation or the unbalance factor of three-phase load, the unbalanced truth of actual load in power network line more can be accurately reflected.
Due in technical scheme, have employed and be integrated respectively each phase Real-time Load electric current processing, obtain the load integration information (or energy information) of each phase line, existing average current model can be overcome cannot to accurately reflect the defect of load condition in power network line, science can correctly reflect the load condition in power network line, adjust for three-phrase burden balance and foundation accurately is provided, make three-phrase burden balance adjustment technology step on a new level, effectively adjust the science of providing for platform district power distribution network three-phrase burden balance it is effectively guaranteed that.
The method can be widely used in equilibrium assignment or the regulation control field of the alternate load of low voltage three-phase supply line.
Claims (7)
1. integration current method or an electric energy method branch units three-phrase burden balance automatic adjustment system, be included in platform district
On each three-phase separate branch road of transformator, a three-phase load acquisition module is set, is used for gathering in this three-phase separate branch road
The size of each phase line load, and by the load of each detected phase line, it is sent to a Ge Tai district terminal；
Described platform district terminal is according to the payload of each phase line in each three-phase separate branch road, it is judged that each three-phase branch
The uneven situation of three-phase load in road, by automatic phase-change switch, carries out the conversion of load phase place；It is characterized in that:
Described three-phase load acquisition module, including three single-phase load collecting units, three described single-phase loads
Collecting unit is combined into one, and constitutes a three-phase load acquisition module；
Described three-phase load acquisition module, A, B, C three-phase of collection place three-phase separate branch road is real-time respectively
Load, and it is sent to load integral unit；
Each phase Real-time Load is integrated processing by described load integral unit respectively, obtains the negative of each phase line
Lotus integration information, and the load integration information of each phase line is delivered to signal processing unit；
Described signal processing unit, according to the time period setting value preset, intercepts each phase line of corresponding time period
Load integrated value information, and be uploaded to platform district terminal by communication unit；
Described platform district terminal, according to the load integrated value information of each phase line in each three-phase separate branch road, with often
Individual three-phase separate branch road is a sub-cellular system, calculates the big of each phase line load in this three-phase separate branch road respectively
Little, according to the unbalance factor obtained, it is judged that the uneven situation of three-phase load in each three-phase separate branch road, by certainly
Dynamic phase-change switch adjusts the balance in this three-phase separate branch road between each phase line load, each to realize platform district transformator
Whole balances of each phase load in individual three-phase separate branch road, and then realize the flat of platform district power distribution network major loop three-phase load
Weighing apparatus, really realizes line loss reducing and improves the mesh of line end low-voltage.
2. automatically adjust according to the integration current method described in claim 1 or electric energy method branch units three-phrase burden balance
Whole system, is characterized in that described three-phase load acquisition module is three monophase current collecting units；Described three
Monophase current collecting unit, gathers A, B, C three-phase Real-time Load electric current of place three-phase separate branch road respectively, send
To load current integral unit, each phase Real-time Load electric current is integrated processing by load current integral unit respectively,
Obtain the current integration values of each phase line, and the current integration values of each phase line delivered to signal processing unit,
Signal processing unit, according to the time period preset or time interval setting value, intercepts in corresponding time period or time interval
The current integration values of each phase line, and be uploaded to platform district terminal by communication unit；
Described platform district terminal, is a sub-cellular system with each three-phase separate branch road, according to each subelement system
In the current integration value information of each phase line, calculate the big of each phase line load current in this subelement system
Little, according to the unbalance factor obtained, it is judged that the uneven situation of three-phase load in each subelement system, by certainly
Dynamic phase-change switch, adjusts the balance between each phase line load in the three-phase separate branch road of this subelement system.
3. automatically adjust according to the integration current method described in claim 1 or electric energy method branch units three-phrase burden balance
Whole system, is characterized in that described three-phase load acquisition module is three single-phase electric energy collecting units；Described three
Single-phase electric energy collecting unit, gathers the real-time electric energy of A, B, C three-phase load of place three-phase separate branch road respectively,
Obtain the energy value information of each phase line, and the energy value information of each phase line delivered to signal processing unit,
Signal processing unit, according to the time period preset or time interval setting value, intercepts in corresponding time period or time interval
The energy value information of each phase line, and be uploaded to platform district terminal by communication unit；
Described platform district terminal, is a sub-cellular system with each three-phase separate branch road, according to each subelement system
In the energy value information of each phase line, it is judged that the uneven situation of three-phase load in each subelement system, obtain
The unbalance factor of this subelement system, by automatic phase-change switch, adjusts in the three-phase separate branch road of this subelement system
Balance between each phase line load.
4. automatically adjust according to the integration current method described in claim 1 or electric energy method branch units three-phrase burden balance
Whole system, after it is characterized in that described load integral unit receives current instantaneous load value, according to equal interval sampling
Rule, in each time quantum, reads once current instantaneous load value, after completing the Integral Processing to load,
And deliver to load memorizer.
5. automatically adjust according to the integration current method described in claim 1 or electric energy method branch units three-phrase burden balance
Whole system, is characterized in that described communication unit is 485 communications interface units, wireless or carrier communication unit.
6. automatically adjust according to the integration current method described in claim 1 or electric energy method branch units three-phrase burden balance
Whole system, is characterized in that described three-phase load acquisition module is arranged on each three-phase separate branch road；Or, it is arranged on
In the residual current circuit breaker of each three-phase separate branch road, constitute three-phase electricity streaming or Electric energy type residual current circuit breaker.
7. automatically adjust according to the integration current method described in claim 1 or electric energy method branch units three-phrase burden balance
Whole system, is characterized in that described branch units three-phrase burden balance automatic adjustment system, at original three-phase load certainly
On the basis of dynamic balancing system, on each three-phase separate branch road of platform district transformator, install three-phase load respectively additional and adopt
Collection module, described three-phase load acquisition module is three monophase current collecting units, three single-phase electric energies collection lists
Unit, three-phase electricity streaming or Electric energy type residual current circuit breaker, gathered each phase line in corresponding three-phase separate branch road by it
Current integration or the energy information of each phase line, use integration current method or electric energy method as three-phrase burden balance
The means calculated and adjust, and be a sub-cellular system with each branch path, adjust the balance of its three-phase load,
To overcome existing average current model cannot accurately reflect the defect of load condition in power network line, can correctly reflect electricity
The true load condition of each phase line in net three-phase line, adjusts for three-phrase burden balance and provides foundation accurately,
Realize the real balance of platform district power distribution network three-phase load and effectively adjust.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610471170.7A CN105978004A (en) | 2016-06-23 | 2016-06-23 | System for automatically adjusting balance of three-phase loads of branch unit by utilizing integral current method or electric energy method |
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| CN107069779A (en) * | 2017-02-22 | 2017-08-18 | 安徽电信工程有限责任公司 | A kind of low-voltage platform area becomes threephase load automatic-balancing system |
| CN108599203A (en) * | 2018-05-25 | 2018-09-28 | 石家庄科林电气股份有限公司 | A kind of three-phase load unbalance adjusting method adjusting load step by step |
| CN110187232A (en) * | 2019-05-08 | 2019-08-30 | 国网江苏省电力有限公司泰州供电分公司 | A kind of intelligent monitoring device for matching electricity consumption synchronous data sampling suitable for low-voltage platform area |
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