CN106160015B - Parallel operation system module number controlling method based on efficiency and current sharing energy golden section - Google Patents

Abstract

The present invention relates to the parallel operation system module number controlling method based on efficiency and current sharing energy golden section, the present invention is obtaining the corresponding optimum point of expression formula η=Φ (i) between expression formula S=Ψ (i) and efficiency eta and power module load current i between standard deviation S and power module load current i respectivelyWithOn the basis of, using golden section principle in geometry, show that module runs comprehensive optimal load electric current I_ref, have and dynamically adjust online power module quantity in real time, it is ensured that parallel operation system works in always to flow near optimal working point.With high reliablity, it is 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, provides reliable guarantee for the safe and efficient operation of parallel operation system.

Description

It is controlled based on efficiency and the parallel operation system module quantity of current sharing energy golden section Method

Technical field

The present invention relates to the parallel operation system module number controlling methods based on efficiency and current sharing energy golden section, use In optimal control parallel operation system power supply module run quantity, it is ensured that under the conditions of different loads the efficiency of parallel operation system and Stream comprehensive performance is optimal, and this method is equally applicable to other electronic equipment parallel runnings and flows (equal power) performance to efficiency and The requirement of index.

Background technique

It is multiple power module parallel output 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 performance is high, design difficulty is lower, is easily managed, become solve it is high-power defeated One of the preferred option of power supply design out, 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, reaches equal by the output electric current that sharing control algorithm adjusts each power module Stream target and load matching target scheme) parallel operation system in power module working range cover underloading, it is semi-load, specified The operating conditions such as load and overload.On the one hand, its system current sharing can have one when parallel operation system is run under different loads operating condition Determine difference, thus need to optimize parallel operation system control, it is ensured that system always can under different loads current conditions Realize higher current sharing energy；On the other hand, for power module in different loads, working efficiency is also different, thus needs Optimized control is carried out to the quantity of the online power module of parallel operation system, it is ensured that each online power module works in most Near high efficiency point, it is ensured that system system effectiveness under any loading condition is optimal.It is therefore desirable to a kind of new control strategy, It is able to achieve parallel operation system effectiveness and current sharing energy overall target is in higher level.

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 problems that following two：One, can not achieve parallel operation system current sharing can locate In preferable state；Two, parallel operation system can not achieve higher efficiency.So in order to realize parallel operation system in difference Efficiency and stream effect integrated performance index are in higher level under loading condition, and just must be set up efficiency and current sharing can integrate Evaluation index, seek integrated performance index it is optimal when corresponding power module output current value.As long as controlling parallel operation system Power module output current is near optimal output electric current, ensures that parallel operation system efficiency in different loads Stream effect integrated performance index is optimal, it is ensured that efficient, the operation of reliable and long-life of parallel operation system.

However, not yet finding a kind of reliable and practical parallel operation system by retrieving existing paper and patent discovery System module number control method come realize system effectiveness and stream integrated performance index optimization.Thus, it is a kind of reliably and practical Parallel operation system module number controlling method be just particularly important, have for the reliability service of parallel operation system Important influence.

Summary of the invention

It is an object of the present invention to overcome the above deficiencies, propose it is based on efficiency and current sharing energy golden section and Alliance electric system module number control method.

The technical scheme is that：A kind of parallel operation system module number based on efficiency and current sharing energy golden section Amount control method, its step are as follows：

(1) the parallel operation system load electric current I of K power module composition is obtained_outFromIt is divided into according toEquidistantly change toWhen, each power module is in different loads electric currentIn the case of adopt Collect V output electric current Data_curr(m') (i) (j), output voltage Data_volt(m') (i) (j) and input power P (m) (i) (j), Wherein：M' is power module serial number；I is the corresponding sequence number value of load current value；J is output current acquisition data sequence number；M', i, J meets m'={ 1 ... K }, i=1 ... U }, j=1 ... V }；I_NFor the rated current of power module；

(2) power module output current and stream expectation electric current of serial number m' are obtainedRelative deviationMathematic expectaionAnd standard deviationK power module, which is obtained, in stream expectation electric current isWhen average DeviationObtain serial number m' power module stream expectation electric current beWhen efficiencyWith efficiency mathematic expectaionIt obtains Take K power module stream expectation electric current beOperating condition under average efficiency

(3) respectively to U data pointWithIt is handled, obtains mean standard deviation Relationship η between relationship S=Ψ (i) and efficiency eta between S and power module load current i and power module load current i= Φ(i)；

(4) allowing to be met in output current scopeIt is the smallestAnd meetIt is maximum 's

(5) geometry golden section principle is applied, power module is obtained and runs optimal load electric current I_ref, and

(6) with cycle T_sFor the online power module quantity M of interval calculation parallel operation system, and to M online power supply moulds The output electric current of block is acquired, and the output current data of the online power module of m-th of serial number is labeled as Curr (m), m is The serial number of current online power module；

(7) load current of the parallel operation system of M online power module compositions is obtainedWith The equal current load electric current of line power module

(8)|I_share-I_ref|≤σ then continues the current acquisition of next online power module；Conversely, then obtaining online electricity It is reference current I that source module, which exports electric current,_refWhen online power module quantity N^*, i.e.,

(9)N^*≤ 1 is arranged N^*=2；Conversely, obtaining the online power module amount Δ N that parallel operation system need to be adjusted^* =N^*-M；

(10) according to Δ N^*It is positive and negative, Centralized Controller increases or decreases | Δ N^*| a online power module.

Using fitting of a polynomial, curve matching or interpolating method respectively to U data point in step (3)WithIt is handled.

In the step (1)-step (5),

(1) t ∈ ((i-1) T, iT], (U >=i >=1), electronic load current isThen power module Flow target reference current：

(2) the power module output current sampled data data of serial number m' are obtained：Data_curr(m') (i) (j), (K >= M' >=1, U >=i >=1, V >=j >=1), and obtain it and flow relative deviation δ (m') (i) (j)：

(3) power module for obtaining serial number m' existsUnder the conditions of relative deviation δ (m') (i) (j) about j Mathematic expectaion E_m'i：

(4) power module for obtaining serial number m' existsUnder the conditions of relative deviation δ (m') (i) (j) about j Standard deviation S_m'i：S_m'iIndicate that the power module of serial number m' existsUnder the conditions of relative deviation standard deviation；

(5) obtaining K power module in stream expectation electric current isWhen mean standard deviation：

(6) to U data pointCarry out processing obtain mean standard deviation S and power module load current i it Between relationship：S=Ψ (i), and allowing to be met in output current scopeLoad current

(7) power module for obtaining serial number m' existsCondition efficiency eta (m') (i) (j)：

(8) power module for obtaining serial number m' existsUnder the conditions of mathematics phase of the η (m') (i) (j) about j Hope η_m'i：η_m'iIndicate that the power module of serial number m' existsUnder the conditions of efficiency Average value；

(9) obtaining K power module in stream expectation electric current isOperating condition under average efficiency：

(10) to U data pointIt carries out handling the pass obtained between efficiency eta and power module load current i System：η=Φ (i), and allowing in output current scope, it obtains and meetsLoad current

(11) using golden section principle in geometry, pass throughObtain optimal load Electric current I_ref。

The principle of the present invention mainly includes following part：Firstly, obtaining parallel operation system allowing in output current scope Corresponding load current when system power module efficiency optimizationSecondly, obtaining parallel operation system allowing in output current scope The equal flow standard deviation average of all power modules of unitingCorresponding load current when minimumWherein：S_jIt is j-th The equal flow standard deviation of power module；Again, according to geometry golden section principle, optimal current I is sought_refMeetFinally, obtaining the total load current I of parallel operation system in real time_outWith seek it is optimal online Run power module quantityIt controls online power module quantity and is equal to or approaches N*, it is ensured that system works in always Near current sharing energy optimum point.Due to the power module of same size, its characteristic is totally consistent, thus by measurement K (K's Size can be determined that K of the present invention fixes tentatively the parallel operation system for 10) a power module composition under different loads electric current by user Efficiency and current sharing energy index can be obtained the parallel operation system of any N number of power module composition in different loads Current sharing energy index.

The present invention has the advantage that：

(1) present invention covers load current full operating range operating conditions, 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 obtain respectively expression formula S=Ψ (i) between standard deviation S and power module load current i and The corresponding optimum point of expression formula η=Φ (i) between efficiency eta and power module load current iWithOn the basis of, application is several Golden section principle in He Xue show that module runs comprehensive optimal load electric current I_ref.The value characterizes parallel operation system and flows Efficiency and stream response concentration degree integrated performance index is optimal and its corresponding in wire module load current value in the process, for parallel connection Power supply system efficiency and flow-optimized control provide foundation.

(4) present invention has dynamically adjusts online power module quantity in real time, it is ensured that parallel operation system works in always Flow near optimal working point.

(5) the parallel operation system module quantity controlling party of the present invention based on efficiency and current sharing energy golden section Method has the features such as high reliablity, 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 and efficient operation of parallel operation system.

Detailed description of the invention

Fig. 1 is parallel operation system construction drawing.

Fig. 2 is parallel operation system effectiveness and flows comprehensive performance testing system structure chart.

Specific embodiment

The embodiment of the present invention is described further below for attached drawing：

The present invention provides the parallel operation system module number controlling methods based on efficiency and current sharing energy golden section. Fig. 1 show parallel operation system construction drawing, and Fig. 2 show parallel operation system effectiveness and flows comprehensive performance testing system knot Composition.Fig. 1 mainly includes parallel operation system Centralized Controller, power module and power load.Centralized Controller passes through communication Bus obtains the IP and its output electric current in wire module, the quantity of the online power module of optimal control；Power module is mainly realized Power to the load, receive Centralized Controller operation control command and upload output electric current；Power load mainly includes all kinds of use Electric equipment.The realization of regulatory function is flowed whether there is or not communication bus autonomous equalizing current mode and has communication bus to flow mode, by special Flow equalizing function module realize that the present invention do not repeat.Fig. 2 major function is to obtain the equal flow standard deviation of parallel operation system module With the mathematical relationship S=Ψ (i) and efficiency of load current and functional relation η=Φ (i) of load current, and determine it is respective most Excellent load currentWithOn this basis, comprehensive performance is flowed using geometry golden section principle and then determining efficiency and Load current I when optimal_ref.Fig. 2 mainly includes host computer (PC machine), program-control electronic load, power module, power meter etc..On Position machine (PC machine) 1 major function is to obtain online module I P address, input power, module output current, output power, control journey It controls electronic load operating current, calculate S=Ψ (i), η=Φ (i) and optimal load electric current I_ref；Program-control electronic load is for adjusting Save the load current of parallel operation system；Power module, which is mainly realized, to be received IP setting, receives host computer order data and upload Electric current, output power are exported to host computer；Power meter is mainly used for measuring the input power in wire module.

One, parallel operation system effectiveness and stream comprehensive performance testing system variable declaration are as follows：K is parallel operation test The occurrence of system power supply module number, K can be set according to actual conditions.I_NFor power module rated current；For simultaneously alliance Electric system output-current rating meetsU is load current point quantity, i.e. parallel operation system load electric current I_outFromIt 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)； Electric current is exported at i-th for electronic load, wherein：U≥i≥1；M' is power module serial number, is met：K power module IP is mapped as m'=1 according to order from small to large, and 2 ... K, i.e. m'=1 are the smallest power module serial number of IP, m'=2 IP Secondary minimal power module serial number ..., and so on m'=K be the maximum power module serial number of IP；V is that parallel operation system is in It need to be to ought individually online power module output current, output voltage and input power data sampling number when a certain load current point Amount, V can be sized according to actual needs.Data_curr(m') (i) (j), (K >=m' >=1, U >=i >=1, V >=j >=1) are serial number Exist for the power module of m'Under the conditions of j-th of current sampling data；Data_volt(m') (i) (j), (K >=m' >= 1, U >=i >=1, V >=j >=1) exist for the power module of serial number m'Under the conditions of j-th of output voltage hits According to；P (m') (i) (j), (K >=m' >=1, U >=i >=1, V >=j >=1) are that the power module of serial number m' existsItem J-th of input power sampled data under part；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：η_m'iPower module for serial number m' existsUnder the conditions of V η (m') (i) (j) mathematic expectaion, meet：I_refIt (i) is power supply Module existsUnder the conditions of flow target reference, meet：Wherein：U≥i≥1；δ (m') power module that (i) (j) is serial number m' existsUnder the conditions of j-th sample rate current with flow reference target Electric currentRelative standard deviation values, meet：E_m'iFor serial number m' Power module existUnder the conditions of V δ (m') (i) (j) mathematic expectaion, meet： S_miPower module for serial number m' existsUnder the conditions of V δ (m') (i) (j) standard deviation, meet：

Define the last moment that t=0 is the idle running of parallel operation system；T is two neighboring load current interval time； Then t ∈ ((i-1) T, iT], (U >=i >=1) be parallel operation system load electric currentRuning time.Due toNeed to acquire each power module 3V sample data 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 works inState needs T_total=3 × K × V × T₁Time, thus must satisfy T >=T_total.Again due to current sharing energy data reliability and sampling number With sampling time T₁Correlation, thus T and T need to be comprehensively considered according to actual needs₁Size, it is ensured that the reliability of current sharing energy index.

Firstly, 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 measured.Thus, parallel operation system electronic load byStep isWhen, we again may be by the electric current output of measurement power module and flow between 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 its collection for flowing the output electric current 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 seeking the expression between standard deviation S and power module load current i Expression formula η=Φ (i) and its corresponding optimal load electricity between formula S=Ψ (i) and efficiency eta and power module load current i StreamWithOn the basis of, efficiency is determined using geometry golden section principle and flows comprehensive performance optimal load electric current I_ref, it is best that physical significance shows that parallel operation system is in efficiency and stream comprehensive performance under which kind of load current.

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'：Data_curr(m') (i) (j), (K >=m' >= 1, U >=i >=1, V >=j >=1), thus, stream relative deviation δ (m') (i) (j) is：

The power module for seeking serial number m' existsUnder the conditions of number of the relative deviation δ (m') (i) (j) about j Term hopes E_m'iFor：

The power module for seeking serial number m' existsUnder the conditions of mark of the relative deviation δ (m') (i) (j) about j Quasi- deviation S_m'iFor：

S_m'iPhysical significance be：The power module of serial number m' existsUnder the conditions of relative deviation standard Deviation, S_m'iIt is smaller show power moduleUnder the conditions of adfluxion moderate performance it is better.

K power module, which is calculated, in stream expectation electric current isWhen mean standard deviation：

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 mean standard deviation S and power module load current i：

S=Ψ (i), (6)

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 of the η (m') (i) (j) about j η_m'iFor：

η_m'iPhysical significance be：The power module of serial number m' existsUnder the conditions of efficiency average value, η_m'iShow more greatly power moduleUnder the conditions of economic performance it is better, it is more energy saving；

K power module, which is calculated, in stream expectation electric current isOperating condition 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), (11)

Allowing in output current scope, is solving load currentMeet：

Using golden section principle in geometry, optimal load electric current I is calculated_ref, meet：

I_refPhysical significance be：The parallel operation system effectiveness and stream comprehensive performance be made of K power module is optimal When load current：

Two, the figure variable declaration of parallel operation system optimization control structure is as follows：

T_sOnline power module quantity is calculated for Centralized Controller and acquires the period of power module output current data；M For online power module quantity；I_outFor the load current of parallel operation system；Curr (m) is the online power module of serial number m Output current sampling data, m=1,2, ┄, m are the serial number of current online power module, M；I_refFor parallel operation system effectiveness Load current corresponding to online power module when stream comprehensive performance is optimal；I_shareIt is electric online when being run for parallel operation system Source module output electric current flows target value；Δ I is I_shareWith I_refAbsolute value of the difference；σ is I_shareWith I_refDifference absolute value Maximum permissible value.

In t=KT_s, K=0, at 1,2,3 ... moment, parallel operation system Centralized Controller starts to acquire by communication bus The output electric current Curr (m), m=1,2 of M online power modules, ┄, M；Calculate parallel operation system load electric current I_out, full Foot：

Calculate online power module output current target value I_share, meet：

Calculate online power module output current target value I_shareWith I_refAbsolute value of the difference Δ I, meet：

Δ I=| I_share-I_ref|, (16)

Judge whether Δ I meets inequality：

Δ I < σ, (17)

In inequality (17) ungratified situation, calculating parallel operation system load electric current is I_outWhen, it efficiency and flows Online power module quantity N under comprehensive performance optimal conditions^*, meet：

In inequality (17) ungratified situation, the online power module regulated quantity Δ N of parallel operation system is calculated^*, full Foot：

ΔN^*=N^*- M, (19)

Centralized Controller increases (reduction) | Δ N^*| a online power module, it is ensured that parallel operation system effectiveness and flow comprehensive Close best performance.

The present invention provides the parallel operation system module number controlling method based on efficiency and current sharing energy golden section, Include the following steps：

(1) the parallel operation system load electric current I of K power module composition is obtained in advance_outFromAccording to interval ForEquidistantly change toWhen (cover underloading, semi-load, specified load and overload conditions, U to meet and be necessary for Positive integer not less than 20；I_NFor the rated current of power module), each power module is in different loads electric currentIn the case of acquire V output electric current Data_curr(m') (i) (j), output voltage Data_volt(m') (i) (j) and Input power P (m') (i) (j) (V can determine size according to practical by user).Wherein：M' is power module serial number；I is load The corresponding sequence number value of current value；J is output current acquisition data sequence number；M', i, j meet m'={ 1 ... K }, i={ 1 ... U }, j =1 ... V }；

(2) power module output current and stream expectation electric current of serial number m' are calculatedRelative deviationMathematic expectaionAnd standard deviation(S_m'iThe smaller equal adfluxion moderate performance for showing power module is better)；Calculate K Power module stream expectation electric current beWhen mean standard deviationCalculate the power supply mould of serial number m' Block stream expectation electric current beWhen efficiencyAnd effect Rate mathematic expectaion(η_miShow that the efficiency of power module is higher more greatly)；K power module is calculated to exist Flowing expectation electric current isOperating condition under average efficiency

(3) using Related Computational Methods (fitting of a polynomial, curve matching, interpolating method etc.) respectively to U data PointWithProcessing is carried out to obtain between mean standard deviation S and power module load current i Expression formula S=Ψ (i) and efficiency eta and power module load current i between expression formula η=Φ (i)；

(4) allowing in output current scope, solvingMeetIt is minimum andMeetIt is maximum；

(5) geometry golden section principle is applied, power module is solved and runs optimal load electric current I_ref, meet

(6) with cycle T_sFor the online power module quantity M of interval calculation parallel operation system, and to M online power supply moulds The output electric current of block is acquired, and the output current data of the online power module of first serial number is labeled as Curr (1), when Preceding online power module serial number m, enables m=1；

(7) load current of the parallel operation system of M online power module compositions is calculatedWith The equal current load electric current of line power module

(8) judge | I_share-I_refWhether |≤σ is true？If it is, entering step (6)；Conversely, then entering step (9)；

(9) calculating online power module output current is reference current I_refWhen online power module quantity N^*, i.e.,

(10) judge N^*≤1？It is whether true？If it is, entering step (11)；Conversely, entering step (12)；

(11) N is set^*=2；This is because N^*<It is single supply module for power supply when 2, does not have flow equalizing function.

(12) online power module amount Δ N need to be adjusted by calculating parallel operation system^*=N^*-M；

(13) judge Δ N^*> 0？It is whether true？If it is, entering step (14)；Conversely, entering step (15)；

(14) Centralized Controller increases Δ N^*A online power module, subsequently into step (6)；

(15) Centralized Controller reduces Δ N^*A online power module, subsequently into step (6).

Embodiment is not construed as the limitation to invention, but any based on spiritual improvements introduced of the invention, all Ying Ben Within the protection scope of invention.

Claims (3)

1. a kind of parallel operation system module number controlling method based on efficiency and current sharing energy golden section, feature exist In：Its step are as follows：

(1) the parallel operation system load electric current I of K power module composition is obtained_outFromIt is divided into according toEquidistantly change toWhen, each power module is in different loads electric currentIn the case of adopt Collect V output electric current Data_curr(m') (i) (j), output voltage Data_volt(m') (i) (j) and input power P (m ') (i) (j), Wherein：M' is power module serial number；I is the corresponding sequence number value of load current value；J is output current acquisition data sequence number；M', i, J meets m'={ 1 ... K }, i=1 ... U }, j=1 ... V }；I_NFor the rated current of power module；

(2) power module output current and stream expectation electric current of serial number m' are obtainedRelative deviationMathematic expectaionAnd standard deviationK power module, which is obtained, in stream expectation electric current isWhen average DeviationObtain serial number m' power module stream expectation electric current beWhen efficiencyWith efficiency mathematic expectaion K power module, which is obtained, in stream expectation electric current isOperating condition under average efficiency

(3) respectively to U data pointWithIt is handled, obtains mean standard deviation S_iWith Power module load current i_NBetween relationship S_i=Ψ (i_N) and efficiency eta and power module load current i_NBetween relationship η= Φ(i_N)；

(4) allowing to be met in output current scopeIt is the smallestAnd meetIt is maximum

(5) geometry golden section principle is applied, power module is obtained and runs optimal load electric current I_ref, and

(6) with cycle T_sFor the online power module quantity M of interval calculation parallel operation system, and to the defeated of M online power modules Electric current is acquired out, the output current data of the online power module of m-th of serial number is labeled as Curr (m), m is currently to exist The serial number of line power module；

(7) load current of the parallel operation system of M online power module compositions is obtainedWith online power supply The equal current load electric current of module

(8)|I_share-I_ref|≤σ then continues the current acquisition of next online power module；Conversely, then obtaining online power supply mould It is reference current I that block, which exports electric current,_refWhen online power module quantity N^*, i.e.,

(9)N^*≤ 1 is arranged N^*=2；Conversely, obtaining the online power module amount Δ N that parallel operation system need to be adjusted^*=N^*- M；

(10) according to Δ N^*It is positive and negative, Centralized Controller increases or decreases | Δ N^*| a online power module.

2. according to claim 1 controlled based on efficiency and the parallel operation system module quantity of current sharing energy golden section Method, it is characterised in that：Using fitting of a polynomial, curve matching or interpolating method respectively to U data point in step (3)WithIt is handled.

3. according to claim 1 controlled based on efficiency and the parallel operation system module quantity of current sharing energy golden section Method, it is characterised in that：In the step (1)-step (5),

(1) at t ∈ [(i-1) T, iT], U >=i >=1, electronic load current isThe then stream mesh of power module Mark reference current：

(2) the power module output current sampled data data of serial number m' are obtained：Data_curr(m') (i) (j), K >=m' >=1, U >=i >=1, V >=j >=1, and obtain it and flow relative deviation δ (m') (i) (j)：

(3) power module for obtaining serial number m' existsUnder the conditions of number of the relative deviation δ (m') (i) (j) about j Term hopes E_m'_i：

(4) power module for obtaining serial number m' existsUnder the conditions of mark of the relative deviation δ (m') (i) (j) about j Quasi- deviation S_m'i：

S_m'iIndicate that the power module of serial number m' existsUnder the conditions of relative deviation standard deviation；

(5) obtaining K power module in stream expectation electric current isWhen mean standard deviation：

(6) to U data pointIt carries out processing and obtains mean standard deviation S_iWith power module load current i_NBetween Relationship：S_i=Ψ (i_N), and allowing to be met in output current scopeLoad current

(7) power module for obtaining serial number m' existsUnder the conditions of efficiency eta (m') (i) (j)：

(8) power module for obtaining serial number m' existsUnder the conditions of mathematic expectaion of the η (m') (i) (j) about j η_m'i：

η_m'iIndicate that the power module of serial number m' existsUnder the conditions of efficiency average value；

(9) obtaining K power module in stream expectation electric current isOperating condition under average efficiency：

(10) to U data pointIt carries out processing and obtains efficiency eta and power module load current i_NBetween relationship：η =Φ (i_N), and allowing in output current scope, it obtains and meetsLoad current

(11) using golden section principle in geometry, pass throughObtain optimal load electric current I_ref。