CN106160020B - Based on the parallel operation system current sharing energy evaluation method for flowing deviation expected matrix ∞ norms - Google Patents
Based on the parallel operation system current sharing energy evaluation method for flowing deviation expected matrix ∞ norms Download PDFInfo
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- CN106160020B CN106160020B CN201610528785.9A CN201610528785A CN106160020B CN 106160020 B CN106160020 B CN 106160020B CN 201610528785 A CN201610528785 A CN 201610528785A CN 106160020 B CN106160020 B CN 106160020B
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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
- H02J4/00—Circuit arrangements for mains or distribution networks not specified as ac or dc
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Abstract
The present invention relates to based on the parallel operation system current sharing energy evaluation method for flowing deviation expected matrix ∞ norms, the present invention (can cover underloading, semi-load by building parallel operation system in different loads, nominal load and overload) power module actual current value and it is expected the expected matrix of equal flow valuve deviation, and then calculate the ∞ norms of the expected matrix, and according to ∞ norms come evaluate its current sharing can height, the present invention passes through the expected matrix for flowing relative deviation built under various loading conditionsAnd it calculates∞ norms | | A | |∞, which determines the serial number of the worst module of current sharing energy in parallel operation system and quantitatively determines current sharing energy worst-case value, and foundation is provided for power module current sharing energy optimization design.For the present invention by setting maximum allowable boundary value σ, whether the current sharing of energy all modules of quick discrimination parallel operation system can qualified.
Description
Technical field
The present invention relates to based on the parallel operation system current sharing energy evaluation method for flowing deviation expected matrix ∞ norms, use
In evaluation parallel operation system current sharing energy, current sharing energy comments when this method is equally applicable to other electronic equipment parallel runnings
Valence.
Background technology
It is multiple power module Parallel opertation structures to high-power parallel operation system, 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 switch power module parallel operation.Flow skill
Art refer in multiple power module parallel operations, under the premise of meeting output voltage stable state accuracy and dynamic response, have compared with
It is high-precision to evenly distribute each power module load current.So the height of switch power parallel power supply system current sharing energy
It is directly related to the safe and reliable and high performance operation of machine system.
Due to parallel operation system, it is worked under various loading conditions, covers underloading, semi-load, nominal load and overload
Deng, thus necessary thoroughly evaluating system is in different loads current sharing energy.Only parallel operation system is in various load bars
Current sharing energy index can be met under part, just can ensure that efficient, the operation of reliable and long-life of parallel operation system.
However, by inquiring existing paper and patent shows not yet to find a kind of science, reliable, comprehensive and practical
Parallel operation system current sharing energy evaluation method, only in inverter parallel running system exist based on sagging parameter and
Through transport row evaluation method.But this method is that adjusting is active, and idle occasion uses, and is not appropriate for other parallel operation system current sharings
It can evaluation.Thus, when working under different load conditions for parallel operation system, a kind of science is reliable, comprehensive and practical
Parallel operation system current sharing energy evaluation method has important influence for parallel operation system.
Invention content
It is an object of the present invention to overcome the above deficiencies, it is proposed that based on stream deviation expected matrix ∞ norms and
Alliance electric system current sharing energy evaluation method.The present invention (can be contained by building parallel operation system in different loads
Lid underloading, semi-load, nominal load and overload) power module actual current value and the equal flow valuve deviation of expectation expected matrix, in turn
Calculate the ∞ norms of the expected matrix, and according to ∞ norms come evaluate its current sharing can height.
The technical scheme is that：A kind of parallel operation system current sharing based on stream deviation expected matrix ∞ norms
Energy evaluation method, its step are as follows：
(1) it is adjacent two grades of load current interval times program-control electronic load electric current to be adjusted with cycle T, by i-th
Shelves program-control electronic load current value is labeled asCorresponding i-th grade of power module flows desired value mark
It is denoted asIt is i that Current electronic, which loads gear number, enables i=1；
(2) with cycle TsParallel operation system power supply module output current is acquired for interval；
(3) it establishes by NtThe parallel operation system power supply module output current value array { Data that × U × V element is constituted
(m) (i) (j) }, wherein m=1,2 ... Nt, i=1,2 ... U }, j=1,2 ... V }；NtFor parallel operation system power supply
Module number, for the positive integer more than 1；U is the gear number of program-control electronic load operating current, for the positive integer more than 1；
(4) power module for obtaining serial number m flows relative deviation array
Wherein m=1,2 ... Nt, i=1,2 ... U }, j=1,2 ... V }；
(5) power module for obtaining serial number m flows the mathematic expectaion of relative deviation arrayIts
Middle m=1,2 ... Nt, i=1,2 ... U }；
(6) it establishes by NtThe N that × U element is constitutedtThe stream relative deviation mathematic expectaion square of row U row parallel operation systems
Battle arrayMeet：
(7) it obtainsSet up corresponding power module serial number k values and∞ normsWherein, m={ 1,2 ... Nt, k ∈ [1, Nt]；
(8) obtaining parallel operation system current sharing energy index value is | | A | |∞；
(9) judge | | A | |∞Whether≤σ is true, and establishment then marks parallel operation system current sharing qualified；It is invalid then
Mark parallel operation system current sharing unqualified；Wherein, σ is right for preset power module current sharing energy Qualification
The boundary value answered.
In the step (2), by the power module of m-th of serial number i-th grade of electronic load current situation down-sampling jth
A current data is labeled as Data (m) (i) (j)；By the power module of m-th of serial number in i-th grade of electronic load current
J-th of current data and the power module of sampling flow desired value Iref(i) relative deviation is labeled as δ (m) (i) (j)；By m-th
The power module of serial number flows desired value relative deviation in the current data of i-th grade of electronic load current with power module
Mathematic expectaion be labeled as Emi。
The present invention has the advantage that：
1. present invention covers operating modes such as underloading, semi-load, nominal load and overloads, there is wide applicability.
2. the present invention is by building the expected matrix for flowing relative deviation under various loading conditionsAnd it counts
It calculates∞ norms | | A | |∞, the norm determine current sharing in parallel operation system can worst module serial number
And current sharing energy worst-case value is quantitatively determined, provide foundation for power module current sharing energy optimization design.
3. the present invention is by setting maximum allowable boundary value σ, the stream of energy all modules of quick discrimination parallel operation system
Whether performance is qualified.
4. parallel operation system current sharing energy evaluation method of the present invention has calculating speed fast, reliability is high, real
The features such as strong with property；The parallel operation system failure can be effectively prevent to run, improve system lifetim and reliability, be parallel operation
The safe efficient operation of system provides reliable ensure.
Description of the drawings
Fig. 1 is parallel operation system construction drawing.
Specific implementation mode
The embodiment of the present invention is described further below for attached drawing：
The present invention provides based on flow deviation expected matrix ∞ norms parallel operation system current sharing energy evaluation method,
It is relatively inclined between module actual current and desired reference electric current under different load conditions to be based primarily upon following parallel operation systems
The ∞ norm mathematical models of poor expected matrix.Parallel operation system schematic is as shown in Figure 1, include mainly host computer (PC machine), journey
Control electronic load and power module etc..Host computer (PC machine) major function is acquisition module IP address and module output current, control
Program-control electronic load operating current processed and calculating flow deviation mathematic expectaion matrix ∞ norms and obtain test result data；It is program-controlled
Electronic load is used to adjust the load current of parallel operation system；Power module, which is mainly realized, to be received IP settings, receives host computer
Order data and upload output current are to host computer.
Variable declaration is as follows：K is that power cabinet uniline places power module quantity；N is power cabinet line number；NtFor Switching Power Supply
Total number of modules amount meets：NtThe occurrence of=K × N, K and N can be set according to actual conditions.For parallel operation system nominal
Output current meetsU is that program-control electronic load operating current adjusts gear number, and U can be set greatly according to actual needs
It is small.It is run under underloading, semi-load, nominal load and overload situations to meet, the setting value of U should be greater than 10.For journey
Electronic load output current at i-th grade is controlled, wherein：U≥i≥1；M is power module serial number, is met：NtThe IP of a module is pressed
It is mapped as m=1,2 ... N according to order from small to larget, i.e. m=1 is the module serial number of IP minimums, and m=2 is IP minimum module
Serial number ..., and so on m=NtFor the maximum module serial numbers of IP；V is the module output that acquisition is needed under a certain load current condition
Electric current is counted, and V can be sized according to actual needs.Data(m)(i)(j),(Nt>=m >=1, U >=i >=1, V >=j >=1) it is sequence
Number exist for the power module of mUnder the conditions of j-th of current sampling data；Target is flowed for module
Reference value, wherein：U≥i≥1；δ (m) (i) (j) is that the power module of serial number m existsUnder the conditions of j-th sampling
Electric current and stream reference target electric currentRelative standard deviation values, meet：
Wherein：Nt≥m≥1,U≥i≥1,V≥j≥1；EmiPower module for serial number m existsUnder the conditions of V it is opposite
The mathematic expectaion of deviation δ (m) (i) (j) meets： For expected matrix；||A||∞
For the ∞ norms of matrix A；σ is | | A | |∞Permission boundary value, can set according to actual needs.
Define the last moment that t=0 is parallel operation system no-load running；T is adjacent two grades of load current interval times；
Then t ∈ ((i-1) T, iT], (U >=i >=1) be parallel operation system load electric currentRun time section.By
YuIt needs to acquire V sample data to each module in operational process, thus, host computer need to acquire N altogethert×
V data.Assuming that the time that host computer acquires a data is Ts, then system work inState needs Ttotal=
Nt×V×TsTime, thus must satisfy T >=Nt×V×Ts.Again since current sharing can be with sampling number and sampling time TsPhase
It closes, thus T and T need to be considered according to actual demandsSize, it is ensured that the reliability that current sharing can be evaluated.
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 the electric current output of measurement module and flow the dynamic between target reference
Response carrys out the current sharing energy of evaluation module.Secondly, by mathematical statistics knowledge it is found that the mathematic expectaion of stream relative deviation characterized
It is the global consistency between actual value and desired value, embodies the accuracy during its step response, can reflects power module
Current sharing energy index；Finally, by functional mathematical knowledge it is found that can be by seeking relative deviation expected matrix's
∞ norms | | A | |∞Carry out the current sharing energy of overall merit parallel operation system.This is to be based on∞ norms | | A |
|∞Physics the meaning show which power module of parallel operation system in the case that full load flow relative deviation maximum, flow
Maximum relative standard deviation values are | | A | |∞。
T ∈ ((i-1) T, iT], (U >=i >=1), electronic load current isThe then stream target of module
Reference current is：
Obtain the power module output current sampled data data of serial number m：Data(m)(i)(j),(Nt≥m≥1,U≥
I >=1, V >=j >=1), thus, flowing relative deviation data 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：
EmiPhysical significance be：The power module of serial number m existsUnder the conditions of error average value, Emi
It is smaller show power moduleUnder the conditions of current sharing can be better.With EmiExpected matrix is built for element
Solve expected matrix∞ norms | | A | |∞：
||A||∞Physical significance be：By NtThe parallel operation system current sharing of a power module composition can be worst power supply
Module serial number and its corresponding performance value | | A | |∞。
Parallel operation sytem matrix is set∞ norms | | A | |∞Maximum allowable boundary value σ, and judge to differ
Formula：
||A||∞＜ σ； (6)
The physical significance of inequality (6) is：Parallel operation system power supply module current sharing energy boundary value is set, for fast
Speed differentiates whether parallel operation system meets the requirements.
The present invention provides based on flow deviation expected matrix ∞ norms parallel operation system current sharing energy evaluation method,
Include the following steps：
(1) it is adjacent two grades of load current interval times program-control electronic load electric current to be adjusted with cycle T, by first
Shelves program-control electronic load current value is labeled asCorresponding first grade of module flows desired value label
ForIt is i that Current electronic, which loads gear number, enables i=1；
(2) with cycle TsParallel operation system power supply module output current is acquired for interval.By first serial number
Power module first grade of electronic load current situation down-sampling first current data be labeled as Data (1) (1) (1)；
The power module of first serial number is equal in first current data and module of first grade of electronic load current situation down-sampling
Flow desired value Iref(1) relative deviation is labeled as δ (1) (1) (1)；By the power module of first serial number in first grade of electronic load
The mathematic expectaion that current data under current conditions flows desired value relative deviation with module is labeled as E11；Current power module sequence
Number be m, enable m=1；Current acquisition current times are j, enable j=1；
(3) it establishes by NtThe parallel operation system module output current value array { Data (m) that × U × V element is constituted
(i) (j) }, wherein m=1,2 ... Nt, i=1,2 ... U }, j=1,2 ... V }；NtFor parallel operation system power supply mould
Number of blocks, for the positive integer more than 1；U is the gear number of program-control electronic load operating current, for the positive integer more than 1.It is full
Foot evaluation covering underloading, semi-load, nominal load and overload situations, the value of U are more than 10；V be each grade of electronic load in the case of need
The number of acquisition module output current, for the positive integer more than 1；M is preceding power module serial number, and i is that Current electronic loads shelves
Number, j are current acquisition current times.
(4) power module for solving serial number m flows relative deviation array
Wherein m=1,2 ... Nt, i=1,2 ... U }, j=1,2 ... V }；
(5) power module for solving serial number m flows the mathematic expectaion of relative deviation arrayIts
Middle m=1,2 ... Nt, i=1,2 ... U }；
(6) it establishes by NtThe N that × U element is constitutedtRow U row parallel operations system flows relative deviation mathematic expectaion matrixMeet：
(7) it solvesSet up corresponding power module serial number k values and∞ normsWherein, m={ 1,2 ... Nt, k ∈ [1, Nt]；
(8) providing parallel operation system current sharing energy index value is | | A | |∞；
(9) judge | | A | |∞Whether≤σ is true, if set up, is transferred to step (10)；Otherwise, it is transferred to step (11)；Its
In, σ is the boundary value corresponding to preset power module current sharing energy Qualification；
(10) label parallel operation system current sharing can be qualified, is transferred to step (12)；
(11) label parallel operation system current sharing can be unqualified, is transferred to step (12)；
(12) parallel operation system current sharing can be evaluated and terminate.
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 (2)
1. a kind of based on the parallel operation system current sharing energy evaluation method for flowing deviation expected matrix ∞ norms, feature exists
In：Its step are as follows：
(1) it is adjacent two grades of load current interval times program-control electronic load electric current to be adjusted with cycle T, by i-th grade of journey
Control electronic load current value is labeled asCorresponding i-th grade of power module flows desired value and is labeled asIt is i that Current electronic, which loads gear number, enables i=1；
(2) with cycle TsParallel operation system power supply module output current is acquired for interval；
(3) it establishes by NtThe parallel operation system power supply module output current value array { Data (m) (i) that × U × V element is constituted
(j) }, wherein m=1,2 ... Nt, i=1,2 ... U }, j=1,2 ... V }；NtFor parallel operation system power supply number of modules
Amount, for the positive integer more than 1；U is the gear number of program-control electronic load operating current, for the positive integer more than 1；
(4) power module for obtaining serial number m flows relative deviation arrayWherein
M=1,2 ... Nt, i=1,2 ... U }, j=1,2 ... V }；
(5) power module for obtaining serial number m flows the mathematic expectaion of relative deviation arrayWherein m=
{1,2,...Nt, i=1,2 ... U }；
(6) it establishes by NtThe N that × U element is constitutedtThe stream relative deviation mathematic expectaion matrix of row U row parallel operation systemsMeet：
(7) it obtainsSet up corresponding power module serial number k values and∞ normsWherein, m={ 1,2 ... Nt, k ∈ [1, Nt]；
(8) obtaining parallel operation system current sharing energy index value is | | A | |∞；
(9) judge | | A | |∞Whether≤σ is true, and establishment then marks parallel operation system current sharing qualified；It is invalid, it marks
Parallel operation system current sharing can be unqualified；Wherein, σ is corresponding to preset power module current sharing energy Qualification
Boundary value.
2. the parallel operation system current sharing according to claim 1 based on stream deviation expected matrix ∞ norms can be evaluated
Method, it is characterised in that：In the step (2), by the power module of m-th of serial number in i-th grade of electronic load current
J-th of current data of sampling is labeled as Data (m) (i) (j)；By the power module of m-th of serial number in i-th grade of 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 i-th grade of electronic load current flows mesh with power module
The mathematic expectaion of scale value relative deviation is labeled as Emi。
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