CN106208036B - Parallel operation system optimal point determines method - Google Patents
Parallel operation system optimal point determines method Download PDFInfo
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- CN106208036B CN106208036B CN201610528784.4A CN201610528784A CN106208036B CN 106208036 B CN106208036 B CN 106208036B CN 201610528784 A CN201610528784 A CN 201610528784A CN 106208036 B CN106208036 B CN 106208036B
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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Abstract
The present invention relates to determine that method, the present invention are obtaining expression formula η=Φ (i) between efficiency eta and power module load current i and expression formula Γ=Ψ (i) between flow standard deviation inverse Γ and power module load current i and corresponding optimum point respectively based on efficiency and current sharing energy area and maximum parallel operation system optimal pointWithOn the basis of.With the area of η=Φ (i) and Γ=Ψ (i) and for object function, seekWithBetween electric current IrefSo thatWith reliability height, it is highly practical the features such as；Parallel operation system current sharing energy and efficiency index can be effectively taken into account, the performance driving economy and reliability of system are improved, reliable guarantee is provided for the safe efficient operation of parallel operation system.
Description
Technical field
The present invention relates to determine method, energy based on efficiency and current sharing energy area and maximum parallel operation system optimal point
It quickly determines the efficiency of parallel operation system and flows integrated performance index optimal working point, realized for parallel operation system high
Efficiency and current sharing energy overall target optimal control provide support, when this method is equally applicable to other electronic equipment parallel runnings
Efficiency and the determination for flowing integrated performance index optimal working point.
Background technology
It is multiple power module Parallel opertation structures to high-power parallel operation power supply, due to have it is compatible strong, can N+m
Redundancy backup, a series of advantages such as highly reliable, cost-effective, design difficulty is relatively low, is easily managed, become solve it is high-power defeated
Go out one of the preferred option of Power Management Design, equal Flow Technique has become the core technology of parallel operation.Equal Flow Technique refers to multiple
When power module parallel operation, under the premise of meeting output voltage stable state accuracy and dynamic response, there is the uniform of degree of precision
Distribute each power module load current.So the height of parallel operation system current sharing energy is directly related to machine system
Safe and reliable and high performance operation.
Since parallel operation system load electric current has time variation and randomness, cause using traditional sharing control scheme
(i.e. on-line operation power module quantity is constant, and the output current that each power module is adjusted by sharing control algorithm reaches equal
Stream target and load matching target scheme) parallel operation system in power module working range cover underloading, it is semi-load, specified
The operating modes such as load and overload.On the one hand, its system current sharing can have one when parallel operation system operation under different loads operating mode
Determine difference, cannot ensure that system all has higher current sharing energy under different loads current conditions；On the other hand, power module
In different loads, working efficiency is also different, can not ensure that system all has more efficient under different loads operating mode
Rate.It is therefore desirable to which a kind of method determines parallel operation system effectiveness and current sharing energy overall target optimal working point.
Existing parallel operation system sharing control strategy can guarantee parallel operation system load electric current in all online works
It is distributed equally as power module.But there are following two problems：One, can not achieve parallel operation system current sharing can locate
In preferable state；Two, parallel operation system can not achieve higher efficiency.In order to realize parallel operation system in different loads feelings
Under condition efficiency and flow effect integrated performance index, primary prerequisite be must determine parallel operation system effectiveness and stream imitate
Operating point under fruit integrated performance index optimal situation is parallel operation system effectiveness and stream overall performance optimization control
Premise.
However, being found by retrieving existing paper and patent, a kind of reliable and practical parallel operation system is not yet found
System optimum point determines system operating point when method is used to determine efficiency and stream comprehensive performance is optimal.Thus to realize parallel operation
The optimal control of system effectiveness and current sharing energy, it is a kind of to take into account efficiency and current sharing energy and reliable and practical parallel operation system
System optimal working point determines that method is just particularly important, and has for the optimization reliability service of parallel operation system important
It influences.
Invention content
It is an object of the present invention to overcome the above deficiencies, it is proposed that based on efficiency and current sharing energy area and maximum
Parallel operation system optimal point determines method.
The technical scheme is that：One kind is based on efficiency and current sharing energy area and maximum parallel operation system optimal
Point determines method, and its step are as follows：
(1) the parallel operation system load electric current I that K power module is formed by interval time of cycle ToutAccording to step
Input isEqual increments are adjusted；Ith program-control electronic load current value is labeled asCorresponding i-th
Secondary source module flows desired value and is labeled asI is that Current electronic loads number；
(2) with cycle TsFor interval to parallel operation system power supply module output current, output voltage and input power into
Row acquisition；
(3) the power module output current array for the parallel operation system being made of K × U × V element is established
{Datacurr(m) (i) (j) }, power module output voltage array { Datavolt(m) (i) (j) } and power module input power number
Group { P (m) (i) (j) }, wherein m=1,2 ... K, i=1,2 ... U, j=1,2 ... V；K is parallel operation system power supply mould
Number of blocks, for the positive integer more than 1；U is the adjusting number of program-control electronic load operating current；V is electronic load each time
In the case of need the number of acquisition power module output current, output voltage and input power, for positive integer more than 1；M is to work as
Preceding power module serial number, i are that Current electronic loads number, and j is current times of collection.
(4) power module for obtaining serial number m is flowing expectation electric current for Iref(i) relative deviation whenWherein m=1,2 ... K, i=1,2 ... U, j=1,2 ... V；
(5) power module for obtaining serial number m is flowing expectation electric current for Iref(i) expectation of δ (m) (i) (j) when
(6) standard deviation of the power module δ (m) (i) (j) of serial number m is obtained
(7) it is I to obtain K power module in stream expectation electric currentref(i) mean standard deviation whenAnd
Corresponding inverse
(8) to U data pointi∈[1,U]It carries out handling the relationship Γ=Ψ (i) obtained between Γ and i；
(9) allowing in output current scope, obtaining and meetIt is maximum
(10) the power module efficiency of serial number m is obtained
Wherein m=1,2 ... K, i=1,2 ... U, j=1,2 ... V；
(11) mathematic expectaion of the power module η (m) (i) (j) of serial number m is obtainedWherein m
=1,2 ... K, i=1,2 ... U；
(12) to U data pointi∈[1,U]It carries out processing and obtains efficiency eta and power module load current i
Between relationship η=Φ (i)；
(13) allowing in output current scope, obtaining and meetIt is maximum
(14) it obtainsWithBetween meetMaximum electric current Iref：Wherein： WithBetween, the IrefValue is
The efficiency of parallel operation system and stream integrated performance index optimal working point.
In step (2).By the power module of m-th of serial number in j-th of ith electronic load current situation down-sampling electricity
Flow data is labeled as Datacurr(m)(i)(j)；The power module of m-th of serial number is adopted in ith electronic load current
J-th of voltage data of sample is labeled as Datavolt(m)(i)(j)；By the power module of m-th of serial number in ith electronic load
J-th of input power data markers of current conditions down-sampling are P (m) (i) (j)；By the power module of m-th of serial number i-th
J-th of the efficiency calculated in the case of secondary electronic load current is denoted as η (m) (i) (j)；By the power module of m-th of serial number i-th
Efficiency average value is labeled as η in the case of secondary electronic load currentmi；By the power module of m-th of serial number in ith electronic load electricity
J-th of current data of stream situation down-sampling flows desired value I with power moduleref(i) relative deviation is labeled as δ (m) (i)
(j)；Current data by the power module of m-th of serial number in ith electronic load current flows mesh with power module
The mathematic expectaion of scale value relative deviation is labeled as Emi；By the power module of m-th of serial number in ith electronic load current
Current data and power module flow the standard deviation of desired value relative deviation labeled as Smi；
Application fitting of a polynomial, curve matching, interpolating method are to U data point in step (8)i∈[1,
U]It is handled.
Application fitting of a polynomial, curve matching, interpolating method are to U data point in step (12)i∈[1,
U]It is handled.
The principle of the present invention includes mainly with lower part：First, obtain parallel operation system power supply module average efficiency η with
Expression formula η=Φ (i) of power module load current i, and seek corresponding load current when Φ (i) maximumsSecondly, it obtains
Expression formula Γ=Ψ between parallel operation system power supply module mean standard deviation inverse Γ and power module load current i
(i), and corresponding load current when Ψ (i) maximums is soughtFinally, existWithBetween seek optimal current IrefMeet face
Product andDue to the power module of same size, its characteristic is totally consistent, thus logical
Crossing measurement K, (size of K can be determined that K of the present invention fixes tentatively the parallel operation system for 10) a power module composition not by user
The parallel operation system of arbitrary N number of power module composition is can be obtained in different loads with the current sharing energy index under load current
In the case of current sharing energy index.
The present invention has the advantage that：
(1) present invention covers load current full operating range operating modes, have wide applicability；
(2) present invention can integrate and take into account parallel operation system effectiveness and current sharing energy index, with significant economy with
System reliability；
(3) present invention is obtaining expression formula η=Φ (i) between efficiency eta and power module load current i and is flowing respectively
Expression formula Γ=Ψ (i) between standard deviation inverse Γ and power module load current i and corresponding optimum pointWithBase
On plinth.With the area of η=Φ (i) and Γ=Ψ (i) and for object function, seekWithBetween electric current IrefSo thatWherein： WithBetween.The value characterizes
Efficiency and stream integrated performance index is optimal and its corresponding in wire module load current value during parallel operation system flows,
For parallel operation system effectiveness and flow-optimized control provides foundation.
(4) of the present invention based on efficiency and current sharing energy area and maximum parallel operation system optimal point determination side
Method has the features such as reliability is high, highly practical；Parallel operation system current sharing energy and efficiency index can be effectively taken into account, system is improved
The performance driving economy and reliability of system provide reliable guarantee for the safe efficient operation of parallel operation system.
Description of the drawings
Fig. 1 is parallel operation system effectiveness and flows comprehensive performance testing system structure chart.
Fig. 2 is efficiency and flows comprehensive performance area and schematic diagram.
Specific implementation mode
The embodiment of the present invention is described further below for attached drawing：
The present invention provides determine method based on efficiency and current sharing energy area and maximum parallel operation system optimal point.
Fig. 1 show parallel operation system effectiveness and flows comprehensive performance optimal working point test system structure figure, and Fig. 2 is for efficiency and
Flow comprehensive performance area and schematic diagram.Fig. 1 functions are to obtain functional relation η=Φ of parallel operation system effectiveness and load current
(i) and mathematical relationship Γ=Ψ (i) of module equal flow standard deviation inverse and load current, and respective optimal load electricity is determined
StreamWithOn this basis, it with the area of η=Φ (i) and Γ=Ψ (i) and for object function, seeksWithBetween
Electric current IrefSo thatSo that it is determined that efficiency and flowing
Load current I when comprehensive performance is optimalref.Fig. 1 includes mainly host computer (PC machine), program-control electronic load, power module, work(
Rate meter etc..Host computer (PC machine) major function is to obtain online module I P address, input power, module output current, output work
Rate, calculates η=Φ (i), Γ=Ψ (i) and optimal load electric current I at control program-control electronic load operating currentref；Program-controlled electronic
Load the load current for adjusting parallel operation system；Power module, which is mainly realized, to be received IP settings, receives host computer order
Data and upload output current, output power are to host computer；Power meter is mainly used for measuring the input power of online power module.
Fig. 2 gives IrefBeing in where section ensures efficiency and flows comprehensive performance area and maximum schematic diagram.Flow regulatory function
Realization whether there is or not communication bus autonomous equalizing current mode and thering is communication bus to flow mode, realized by special flow equalizing function module,
The present invention does not repeat.
Parallel operation system effectiveness and stream comprehensive performance testing system variable declaration are as follows：K is parallel operation test system
System power module quantity, the occurrence of K can be set according to actual conditions.INFor power module rated current；For parallel operation
System nominal output current meetsU is load current point quantity, i.e. parallel operation system load electric current IoutFromIt is divided into according toEquidistantly change to(cover underloading, semi-load, specified load and overload conditions,
U is necessary for the positive integer not less than 20, can be determined according to the maximum load current value that system works by user)；
For electronic load at i-th output current, wherein：U≥i≥1；M is power module serial number, is met：The IP of K power module
Be mapped as m=1 according to order from small to large, 2 ... K, i.e. m=1 are the power module serial number of IP minimum, m=2 for IP times most
Small power supply module serial number ..., and so on m=K be the maximum power module serial numbers of IP；V is that parallel operation system is in a certain
When load current point need to ought individually online power module output current, output voltage and input power data sampling quantity, V can
It is sized according to actual needs.Datacurr(m) (i) (j), (K >=m >=1, U >=i >=1, V >=j >=1) are the electricity of serial number m
Source module existsUnder the conditions of j-th of current sampling data；Datavolt(m) (i) (j), (K >=m >=1, U >=i >=1,
V >=j >=1) exist for the power module of serial number mUnder the conditions of j-th of output voltage sampled data；P(m)(i)
(j), (K >=m >=1, U >=i >=1, V >=j >=1) is that the power module of serial number m existsUnder the conditions of jth
A input power sampled data；η (m) (i) (j), (K >=m >=1, U >=i >=1, V >=j >=1) are serial number m's
Power module existsUnder the conditions of j-th of efficiency data calculating, meet：ηmiPower module for serial number m existsItem
The mathematic expectaion of V η (m) (i) (j) under part meets：Iref(i) it is that power module existsUnder the conditions of flow target reference, meet：Wherein：U≥i≥1；ηiIt is K
Power module stream expectation electric current beOperating mode under average efficiency, meet：δ(m)(i)(j)
Power module for serial number m existsUnder the conditions of j-th sample rate current with flow reference target electric currentRelative standard deviation values, meet：EmiFor the power supply of serial number m
Module existsUnder the conditions of V δ (m) (i) (j) mathematic expectaion, meet：SmiFor sequence
Number exist for the power module of mUnder the conditions of V δ (m) (i) (j) standard deviation, meet：SiFor K power module standard deviation average value, meetΓiFor
SiInverse, meet：
Define the last moment that t=0 is parallel operation system no-load running；T is two neighboring load current interval time；
Then t ∈ ((i-1) T, iT], (U >=i >=1) is parallel operation system load electric currentRun time.Due toIt needs to acquire 3V sample data to each power module in operational process, thus, host computer need to acquire 3 altogether
× K × V data.Assuming that the time that host computer acquires a data is T1, then system work inState needs
Ttotal=3 × K × V × T1Time, thus must satisfy T >=Ttotal.Again due to current sharing energy data reliability and sampling number
With sampling time T1Correlation, thus T and T need to be considered according to actual demand1Size, it is ensured that the reliability of current sharing energy index.
First, by control engineering knowledge it is found that the overshoot that the performance of evaluation system can be responded by system step, adjustment
Time and steady-state deviation index are weighed.Thus, parallel operation system electronic load byStep isWhen, we again may be by measuring the electric current output of power module and between stream target reference
Dynamic response evaluates the current sharing energy of power module.By mathematical statistics knowledge it is found that the equal flow standard deviation characterization of parallel system
Be the equal flowable state response process relative overshoot size of system, embody the collection for the output current that it is flowed during step response
Moderate can reflect power module current sharing energy index；Secondly, parallel operation system is answered while meeting current sharing energy index
This takes into account the economic benefit of system operation；Finally, by seek the expression formula η between efficiency eta and power module load current i=
Expression formula Γ=Ψ (i) between Φ (i) and standard deviation inverse Γ and power module load current i and corresponding optimal negative
Carry electric currentWithOn the basis of, with the area of η=Φ (i) and Γ=Ψ (i) and for object function, seekWithBetween
Electric current IrefSo thatSo that it is determined that efficiency and flowing
Load current I when comprehensive performance is optimalref, physical significance shows that parallel operation system is in efficiency under which kind of load current
Stream comprehensive performance is best.
In t ∈ ((i-1) T, iT], (U >=i >=1), electronic load current isThe then stream of power module
Target reference current is：
Obtain the power module output current sampled data data of serial number m：Datacurr(m) (i) (j), (K >=m >=1, U
>=i >=1, V >=j >=1), thus, flowing relative deviation δ (m) (i) (j) is：
The power module for seeking serial number m existsUnder the conditions of mathematics of the relative deviation δ (m) (i) (j) about j
It is expected that EmiFor：
The power module for seeking serial number m existsUnder the conditions of standards of the relative deviation δ (m) (i) (j) about j
Deviation SmiFor：
SmiPhysical significance be：The power module of serial number m existsUnder the conditions of relative deviation standard deviation
Difference, SmiIt is smaller show power moduleUnder the conditions of adfluxion moderate performance it is better.
Calculate K power module is in stream expectation electric currentWhen mean standard deviation：
Calculate SiΓ reciprocali, meet：
ΓiPhysical significance be：ΓiShow more greatly power moduleUnder the conditions of equal adfluxion moderate performances
Better.
Using Related Computational Methods (fitting of a polynomial, curve matching, interpolating method etc.) to U data pointIt carries out handling the expression formula obtained between Γ and power module load current i：
Γ=Ψ (i), (7)
Allowing in output current scope, is solving load currentMeet：
The power module for seeking serial number m existsCondition efficiency eta (m) (i) (j) is：
The power module for seeking serial number m existsUnder the conditions of mathematic expectaion ηs of the η (m) (i) (j) about jmi
For：
ηmiPhysical significance be：The power module of serial number m existsUnder the conditions of efficiency average value, ηmi
Show more greatly power moduleUnder the conditions of economic performance it is better, it is more energy saving；
Calculate K power module is in stream expectation electric currentOperating mode under average efficiency：
Using Related Computational Methods (fitting of a polynomial, curve matching, interpolating method etc.) to U data pointIt carries out handling the expression formula obtained between efficiency eta and power module load current i：
η=Φ (i), (12)
Allowing in output current scope, is solving load currentMeet：
With the area of η=Φ (i) and Γ=Ψ (i) and for object function, optimal load electric current I is calculatedref, meet：
Wherein：IrefIt is inWithBetween,It is inWithBetween；
IrefPhysical significance be：The parallel operation system effectiveness and stream comprehensive performance be made of K power module is optimal
When load current.
The present invention provides determining method based on efficiency and current sharing energy area and maximum parallel operation system optimal point,
Include the following steps：
(1) the parallel operation system load electric current I that K power module is formed by interval time of cycle ToutAccording to step
Input isEqual increments are adjusted；First time program-control electronic load current value is labeled asCorresponding
One secondary module flows desired value and is labeled asIt is i that Current electronic, which loads number, enables i=1；
(2) with cycle TsFor interval to parallel operation system power supply module output current, output voltage and input power into
Row acquisition.By the power module of first serial number first time electronic load current situation down-sampling first current data mark
It is denoted as Datacurr(1)(1)(1)；By the power module of first serial number the of first time electronic load current situation down-sampling
One voltage data is labeled as Datavolt(1)(1)(1)；By the power module of first serial number in first time electronic load current
First input power data markers of situation down-sampling are P (1) (1) (1)；By the power module of first serial number for the first time
First efficiency calculated in the case of electronic load current is denoted as η (1) (1) (1)；By the power module of first serial number first
Efficiency average value is labeled as η in the case of secondary electronic load current11；By the power module of first serial number in first time electronic load
First current data of current conditions down-sampling flows desired value I with moduleref(1) relative deviation is labeled as δ (1) (1) (1)；
Current data by the power module of first serial number in first time electronic load current flows desired value phase with module
E is labeled as to the mathematic expectaion of deviation11；By the power module of first serial number in the case that first time electronic load current electricity
The standard deviation that flow data flows desired value relative deviation with module is labeled as S11；Current power module serial number m, enables m=1；
It is i that Current electronic, which loads number, enables i=1；Current acquisition current times are j, enable j=1；
(3) the parallel operation system module output current array { Data being made of K × U × V element is establishedcurr(m)
(i) (j) }, power module output voltage array { Datavolt(m) (i) (j) } and power module input power array { P (m) (i)
(j) }, wherein m=1,2 ... K, i=1,2 ... U, j=1,2 ... V；K is parallel operation system power supply module number, is
Positive integer more than 1；U is the adjusting number of program-control electronic load operating current.Covering underloading, semi-load, specified is evaluated to meet
The value of load and overload situations, U is more than 20；V is to need acquisition module output current, output voltage in the case of electronic load each time
It is the positive integer more than 1 with the number of input power；M is current power module serial number, and i is that Current electronic loads number, j
For current times of collection.
(4) power module for solving serial number m is flowing expectation electric current for Iref(i) relative deviation whenWherein m=1,2 ... K, i=1,2 ... U, j=1,2 ... V；
(5) power module for solving serial number m is flowing expectation electric current for Iref(i) expectation of δ (m) (i) (j) when
(6) standard deviation of the power module δ (m) (i) (j) of serial number m is solved
(7) it is I to calculate K power module in stream expectation electric currentref(i) mean standard deviation whenAnd
Corresponding inverse
(8) apply Related Computational Methods (fitting of a polynomial, curve matching, interpolating method etc.) to U data pointi∈[1,U]It carries out handling the expression formula Γ=Ψ (i) obtained between Γ and i；
(9) allowing in output current scope, solvingMeetIt is maximum；
(10) the power module efficiency of serial number m is solved
Wherein m=1,2 ... K, i=1,2 ... U, j=1,2 ... V；
(11) mathematic expectaion of the power module η (m) (i) (j) of serial number m is solvedWherein m
=1,2 ... K, i=1,2 ... U；(η(m)(i)(j),ηmiShow that the efficiency performance of module is better more greatly)；
(12) apply Related Computational Methods (fitting of a polynomial, curve matching, interpolating method etc.) to U data point∈[1,U]It carries out handling the expression formula η=Φ (i) obtained between efficiency eta and power module load current i；
(13) allowing in output current scope, solvingMeetIt is maximum；
(14) it seeksWithBetween electric current Iref, meetMaximum, i.e.,：Wherein： WithBetween.The IrefValue is
The efficiency of parallel operation system and stream integrated performance index optimal working point；
(15) parallel operation system optimal point determination terminates.
Embodiment is not construed as the limitation to invention, but any spiritual improvements introduced based on the present invention, all Ying Ben
Within the protection domain of invention.
Claims (4)
1. a kind of parallel operation system optimal point determines method, it is characterised in that：Its step are as follows：
(1) the parallel operation system load electric current I that K power module is formed by interval time of cycle ToutAccording to stepping-in amount
ForEqual increments are adjusted；Ith program-control electronic load current value is labeled asCorresponding ith electricity
Source module flows desired value and is labeled asI is that Current electronic loads number；
(2) with cycle TsParallel operation system power supply module output current, output voltage and input power are adopted for interval
Collection；
(3) the power module output current array { Data for the parallel operation system being made of K × U × V element is establishedcurr(m)
(i) (j) }, power module output voltage array { Datavolt(m) (i) (j) } and power module input power array { P (m) (i)
(j) }, wherein m=1,2 ... K, i=1,2 ... U, j=1,2 ... V；K is parallel operation system power supply module number, is
Positive integer more than 1；U is the adjusting number of program-control electronic load operating current；V is to need to acquire in the case of electronic load each time
The number of power module output current, output voltage and input power, for the positive integer more than 1；M is current power module sequence
Number, i is that Current electronic loads number, and j is current times of collection；
(4) power module for obtaining serial number m is flowing expectation electric current for Iref(i) relative deviation whenWherein m=1,2 ... K, i=1,2 ... U, j=1,2 ... V；
(5) power module for obtaining serial number m is flowing expectation electric current for Iref(i) expectation of δ (m) (i) (j) when
(6) standard deviation of the power module δ (m) (i) (j) of serial number m is obtained
(7) it is I to obtain K power module in stream expectation electric currentref(i) mean standard deviation whenAnd it is corresponding
Inverse
(8) to U data pointi∈[1,U]It carries out handling the relationship Γ=Ψ (i) obtained between Γ and i；
(9) allowing in output current scope, obtaining and meetIt is maximum Show that parallel operation system flows
Load current value when best performance；
(10) the power module efficiency of serial number m is obtained
Wherein m=1,2 ... K, i=1,2 ... U, j=1,2 ... V；
(11) mathematic expectaion of the power module η (m) (i) (j) of serial number m is obtainedWherein m=1,
2 ... K, i=1,2 ... U；
(12) to U data pointi∈[1,U]Processing is carried out to obtain between efficiency eta and power module load current i
Relationship η=Φ (i)；
(13) allowing in output current scope, obtaining and meetIt is maximum Show parallel operation system effectiveness
Power module load current value when optimal；
(14) it obtainsWithBetween meetMaximum electric current Iref：Wherein： WithBetween, the IrefValue is
The efficiency of parallel operation system and stream integrated performance index optimal working point.
2. parallel operation system optimal point according to claim 1 determines method, it is characterised in that：In step (2), by
The power module of m serial number is labeled as Data in j-th of current data of ith electronic load current situation down-samplingcurr(m)
(i)(j)；J-th of voltage data by the power module of m-th of serial number in ith electronic load current situation down-sampling marks
For Datavolt(m)(i)(j)；By the power module of m-th of serial number at j-th of ith electronic load current situation down-sampling
Input power data markers are P (m) (i) (j)；The power module of m-th of serial number is counted in ith electronic load current
J-th of the efficiency calculated is denoted as η (m) (i) (j)；The power module of m-th of serial number is imitated in ith electronic load current
Rate average value is labeled as ηmi；By the power module of m-th of serial number in j-th of ith electronic load current situation down-sampling electricity
Flow data flows desired value I with power moduleref(i) relative deviation is labeled as δ (m) (i) (j)；By the power supply mould of m-th of serial number
Block flows the mathematic expectaion mark of desired value relative deviation in the current data and power module of ith electronic load current
It is denoted as Emi；Current data by the power module of m-th of serial number in ith electronic load current is flowed with power module
The standard deviation of desired value relative deviation is labeled as Smi。
3. parallel operation system optimal point according to claim 1 determines method, it is characterised in that：Application in step (8)
Fitting of a polynomial, curve matching, interpolating method are to U data pointi∈[1,U]It is handled.
4. parallel operation system optimal point according to claim 1 determines method, it is characterised in that：Application in step (12)
Fitting of a polynomial, curve matching, interpolating method are to U data pointi∈[1,U]It is handled.
Priority Applications (1)
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