CN106156951B - Parallel operation system current sharing energy evaluation method - Google Patents
Parallel operation system current sharing energy evaluation method Download PDFInfo
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- CN106156951B CN106156951B CN201610532740.9A CN201610532740A CN106156951B CN 106156951 B CN106156951 B CN 106156951B CN 201610532740 A CN201610532740 A CN 201610532740A CN 106156951 B CN106156951 B CN 106156951B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
Abstract
The present invention relates to based on the parallel operation system current sharing energy evaluation method for flowing 2 norm of deviation expected matrix, (underloading, semi-load can be covered in different loads by constructing parallel operation system, nominal load and overload) power module actual current value and the equal flow valuve deviation of expectation expected matrix, and then calculate 2 norms of the expected matrix, and according to 2 norms come evaluate its current sharing can height, the present invention by building different loads in the case of stream relative deviation expected matrixAnd it calculates2 norms | | A | |2.The norm value physical significance are as follows: characterize parallel operation system and flow the distance between relative deviation and dreamboat (i.e. 0 vector) size under all loading conditions, provide foundation for parallel operation optimization design.For the present invention by setting maximum allowable boundary value σ, whether the energy equal flowable state response process population deviation performance of quick discrimination parallel operation system is qualified.
Description
Technical field
The present invention relates to based on the parallel operation system current sharing energy evaluation method for flowing 2 norm of deviation expected matrix, use
In evaluation parallel operation system current sharing energy, current sharing energy is commented when this method is equally applicable to other electronic equipment parallel runnings
Valence.
Background technique
It is multiple power module parallel output 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 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 switch power module parallel operation.Flow skill
Art refers 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 must thoroughly evaluating system current sharing energy in different loads.Only parallel operation system is in various load bars
It is able to satisfy current sharing energy index under part, just can ensure that efficient, the operation of reliable and long-life of parallel operation system.
However, showing not yet to find by the existing paper of inquiry and patent a kind of scientific, 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.
Summary of the invention
It is an object of the present invention to overcome the above deficiencies, propose based on flow 2 norm of deviation expected matrix and
Alliance electric system current sharing energy evaluation method.The present invention (can be contained by constructing parallel operation system in different loads
Lid underloading, semi-load, nominal load and overload) power module actual current value and the expected matrix of it is expected equal flow valuve deviation, in turn
Calculate 2 norms of the expected matrix, and according to 2 norms come evaluate its current sharing can height.
The technical scheme is that a kind of parallel operation system current sharing energy evaluation method, its step are as follows:
It (1) 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 target value mark
It is denoted asI is that Current electronic loads gear number；
(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 greater than 1；U is the gear number of program-control electronic load operating current, for the positive integer greater 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 constitutedtRow U column parallel operation system flows relative deviation mathematic expectaion matrix
(7) it obtains parallel operation system and flows mathematic expectaion matrixTransposed matrix
(8) matrix A is obtainedT* the characteristic equation of A | λ I-ATA |=0 corresponding eigenvalue λi(i=1,2,3 ... U)；
(9) it obtains2 normsλk≥λi, wherein i={ 1,2 ... U }, k ∈ [1, U]；
(10) judge | | A | |2Whether≤σ is true, if so, then mark parallel operation system current sharing qualified；It is on the contrary
Then mark parallel operation system current sharing unqualified；Wherein, σ is that preset parallel operation system current sharing can qualified feelings
Boundary value corresponding to condition.
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 the current data and power module of sampling flow target value Iref(i) relative deviation is labeled as δ (m) (i) (j)；By m-th
Current data of the power module of serial number in i-th grade of electronic load current and power module flow target value relative deviation
Mathematic expectaion be labeled as Emi。
Present invention has the advantage that
1. there is wide applicability present invention covers operating conditions such as underloading, semi-load, nominal load and overloads；
2. the present invention passes through the stream relative deviation expected matrix in the case of building different loadsAnd it calculates2 norms | | A | |2.The norm value physical significance are as follows: characterize parallel operation system in all loading conditions
Under flow the distance between relative deviation and dreamboat (i.e. 0 vector) size, provide foundation for parallel operation optimization design.
3. the present invention was responded by setting maximum allowable boundary value σ, the energy equal flowable state of quick discrimination parallel operation system
Whether journey population deviation performance is qualified；
4. parallel operation system current sharing energy evaluation method of the present invention has calculating speed fast, high reliablity, 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 and efficient operation of system provides reliable guarantee.
Detailed description of the invention
Fig. 1 is parallel operation system construction drawing.
Specific embodiment
The embodiment of the present invention is described further below for attached drawing:
The present invention provides based on flow 2 norm of deviation expected matrix 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
2 norm mathematical models of poor expected matrix.Parallel operation system schematic is as shown in Figure 1, mainly include host computer (PC machine), program-controlled
Electronic load and power module etc..Host computer (PC machine) major function is to obtain module I P address and module output current, control
Program-control electronic load operating current and calculating flow 2 norm of deviation mathematic expectaion matrix and obtain test result data；Program-controlled electric
Son loads the load current for adjusting parallel operation system；Power module, which is mainly realized, to be received IP setting, receives host computer life
It enables data and uploads and export electric current 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
Electric current is exported, is metU 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
Control electronic load exports electric current at i-th grade, in which: U >=i >=1；M is power module serial number, is met: NtThe IP of a module is pressed
M=1,2 ... N are mapped as according to order from small to larget, i.e. m=1 is the smallest module serial number of IP, and m=2 is IP minimum module
Serial number ..., and so on m=NtFor the maximum module serial number of IP；V is the module output that acquisition is needed under a certain load current condition
Electric current points, 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, in which: 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；EmiFor the power supply mould of serial number m
Block existsUnder the conditions of V relative standard deviation values δ (m) (i) (j) mathematic expectaion, meet: For expected matrix；||A||2For 2 norms of matrix A；σ is | | A | |2Permission boundary value, can be according to practical need
It sets.
Define the last moment that t=0 is the idle running of parallel operation system；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 currentRuning time section.By
YuNeed to acquire each module V sample data 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 works inState needs
Ttotal=Nt×V×TsTime, thus must satisfy T >=Nt×V×Ts.When again can be with sampling number and sampling due to current sharing
Between TsCorrelation, thus T and T need to be comprehensively considered according to actual needssSize, it is ensured that the reliability that current sharing can be evaluated.
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 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 flowing the mathematic expectaion table of relative deviation ordered series of numbers
What is levied is the global consistency between actual value and target value, embodies the accuracy during its step response, can reflect power supply
Module current sharing energy index；Finally, by functional mathematical knowledge it is found that can be by seeking relative deviation mathematic expectaion matrix2 norms | | A | |2Carry out the current sharing energy of overall merit parallel operation system.This is to be based on
2 norms | | A | |2Physical significance characterize parallel operation system and flow relative deviation and ideal mesh under all loading conditions
The distance between scale value (i.e. 0 vector) size, and provide its current sharing energy parameter and be | | A | |2。
T ∈ ((i-1) T, iT], (U >=i >=1), electronic load current isThe then stream of power module
Target reference current are as follows:
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, flow relative deviation data δ (m) (i) (j) are as follows:
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 EmiAre as follows:
EmiPhysical significance are as follows: the power module of serial number m existsUnder the conditions of relative deviation be averaged
Value, EmiIt is smaller show power moduleUnder the conditions of current sharing can be better.With EmiExpectation square is constructed for element
Battle arrayWith
Solution matrix AT* the characteristic equation of A:
|λI-ATA |=0； (6)
Corresponding eigenvalue λi(i=1,2,3 ... U) meet
Solve inequality:
λk≥λi； (7)
Set up corresponding λkValue.Wherein, i={ 1,2 ... U }, k ∈ [1, U]；
It solves2 norms:
Wherein, [1, U] k ∈；
||A||2Physical significance are as follows: parallel operation system flows relative deviation and dreamboat under all loading conditions
It is worth the distance between (i.e. 0 vector) size.
Parallel operation system expected matrix is set2 norms | | A | |2Maximum allowable boundary value σ, and sentence
Disconnected inequality:
||A||2< σ； (9)
The physical significance of inequality (9) are as follows: set parallel operation system current sharing energy boundary value, simultaneously for quick discrimination
Whether alliance electric system meets the requirements.
The present invention provides based on flow 2 norm of deviation expected matrix parallel operation system current sharing energy evaluation method,
Include the following steps:
It (1) 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 target 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 target 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
Current data and module under current conditions flow the mathematic expectaion of target value relative deviation 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 greater than 1；U is the gear number of program-control electronic load operating current, for the positive integer greater than 1.It is full
Foot evaluation covering underloading, semi-load, nominal load and overload situations, the value of U are greater than 10；V be each grade of electronic load in the case of need
Acquisition module exports the number of electric current, for the positive integer greater 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 column parallel operation system flows relative deviation mathematic expectaion matrixMeet:
(7) it solves parallel operation system and flows mathematic expectaion matrixTransposed matrix
Meet:
(8) solution matrix AT* the characteristic equation of A | λ I-ATA |=0 corresponding eigenvalue λi(i=1,2,3 ... U)；
(9) it solves2 normsMeet: λk≥λi.Wherein, i={ 1,2 ... U }, k ∈
[1,U]；
(10) judge | | A | |2Whether≤σ is true, if set up, is transferred to step (11)；Otherwise, step (12) are transferred to；
Wherein, σ is boundary value corresponding to preset parallel operation system current sharing energy Qualification；
(11) label parallel operation system current sharing can be qualified, is transferred to step (13)；
(12) label parallel operation system current sharing can be unqualified, is transferred to step (13)；
(13) parallel operation system current sharing can be evaluated and terminate.
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 (1)
1. a kind of parallel operation system current sharing energy evaluation method, it is characterised in that: its step are as follows:
It (1) 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 target value label
ForI is that Current electronic loads gear number,Electric current, I are exported for parallel operation system nominalNFor power supply
Module rated current；
(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 greater than 1；U is the gear number of program-control electronic load operating current, and for the positive integer greater than 1, V is a certain
The module output current points of acquisition are needed under load current condition, V can be sized according to actual needs；
(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 constitutedtRow U column parallel operation system flows relative deviation mathematic expectaion matrix
(7) it obtains parallel operation system and flows mathematic expectaion matrixTransposed matrix
(8) matrix A is obtainedT* the characteristic equation of A | λ I-ATA |=0 corresponding eigenvalue λi, i=1,2,3 ... U；
(9) it obtains2 normsλk≥λi, wherein i={ 1,2 ... U }, k ∈ [1, U]；
(10) judge | | A | |2Whether≤σ is true, if so, then mark parallel operation system current sharing qualified；It is on the contrary then mark
Parallel operation system current sharing can be unqualified；Wherein, σ is right for preset parallel operation system current sharing energy Qualification
The boundary value answered, in the step (2), by the power module of m-th of serial number in i-th grade of electronic load current situation down-sampling
J-th of 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 situation
J-th of the current data and power module of down-sampling flow target value Iref(i) relative deviation is labeled as δ (m) (i) (j)；By m
It is opposite inclined that current data of the power module of a serial number in i-th grade of electronic load current flows target value with power module
The mathematic expectaion of difference is labeled as Emi。
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| CN1581631A (en) * | 2003-07-30 | 2005-02-16 | 飞瑞股份有限公司 | Alternating current output parallel power supply system and its equalized current control method |
| CN103970079A (en) * | 2013-01-30 | 2014-08-06 | 华为技术有限公司 | Power supply system, electronic equipment and power distribution method of electronic equipment |
| CN104734285A (en) * | 2015-02-26 | 2015-06-24 | 张家港市华为电子有限公司 | Method for guaranteeing current-equalizing charging of charging machines when charging machines are connected in parallel |
| CN104880595A (en) * | 2015-04-21 | 2015-09-02 | 北京天诚同创电气有限公司 | Current-sharing power transmission detection method and device for in-phase parallel power transmission system |
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2016
- 2016-06-30 CN CN201610532740.9A patent/CN106156951B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1581631A (en) * | 2003-07-30 | 2005-02-16 | 飞瑞股份有限公司 | Alternating current output parallel power supply system and its equalized current control method |
| CN103970079A (en) * | 2013-01-30 | 2014-08-06 | 华为技术有限公司 | Power supply system, electronic equipment and power distribution method of electronic equipment |
| CN104734285A (en) * | 2015-02-26 | 2015-06-24 | 张家港市华为电子有限公司 | Method for guaranteeing current-equalizing charging of charging machines when charging machines are connected in parallel |
| CN104880595A (en) * | 2015-04-21 | 2015-09-02 | 北京天诚同创电气有限公司 | Current-sharing power transmission detection method and device for in-phase parallel power transmission system |
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