CN103532205A - Modeling method for harmonic model of three-phase charger of electric vehicle - Google Patents

Modeling method for harmonic model of three-phase charger of electric vehicle Download PDF

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CN103532205A
CN103532205A CN201310533127.5A CN201310533127A CN103532205A CN 103532205 A CN103532205 A CN 103532205A CN 201310533127 A CN201310533127 A CN 201310533127A CN 103532205 A CN103532205 A CN 103532205A
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CN103532205B (en
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周念成
王佳佳
王强钢
魏能峤
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Chongqing University
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Abstract

The invention discloses a modeling method for a harmonic model of a three-phase charger of an electric vehicle. The modeling method comprises the following steps: deducing a time-domain expression of an alternating current of the charger of the electric vehicle according to a three-phase uncontrollable bridge type rectification equivalent circuit; creating a three-phase charger harmonic coupling admittance matrix according to obtained charging currents in two work modes; combining the time-domain alternating current with a voltage of the charger, and proposing a model parameter determination method, wherein a coupling effect of the charger-terminal voltage and a harmonic current is considered in the model and matrix elements are not changed along with a harmonic voltage of the charger; creating the harmonic model of the three-phase charger of the electric vehicle in combination with the created coupling admittance matrix according to an admittance matrix parameter calculation method, wherein the harmonic model is used for providing a good theoretical basis for analyzing the characteristics that the harmonic current of a charging station with a plurality of chargers is changed along with the number of the chargers and the charging power. The modeling method can be used for directly and effectively calculating the harmonic current of the three-phase charger of the electric vehicle.

Description

A kind of modeling method of electric automobile three-phase charger harmonic-model
Technical field
The present invention relates to electric automobile field, relate in particular to a kind of modeling method of electric automobile three-phase charger harmonic-model.
Background technology
Along with the promotion and application of electric automobile, the scale of non-linear high-power charger access electrical network increases gradually, and this will bring load impact to electrical network, and the impact that the generations such as the quality of power supply of electrical network, via net loss, utilization rate of equipment and installations be can not be ignored.
Electric automobile battery charger adopts single-phase or rectified three-phase circuit conventionally, at (the society of automotive engineers of american car engineering association, SAE) in charging inlet standard SAE J1772, be divided into Three Estate, the first order is for adopting the charging at a slow speed of single-phase uncontrollable rectification circuit; And other two-stages are the routine (vehicle-mounted) of employing three phase rectifier and (non-vehicle-mounted) charging fast, the charging interval scope of corresponding different capabilities charger is 0.2 to 6 hour, and wherein three-phase normal charge is the most general charging electric vehicle mode of current application.Charger rectifier is typical harmonic-producing load, and its harmonic current, after electrical network transmits, will have a negative impact to equipment such as other load, generator and monitoring and meterings.Electric automobile battery charger harmonic source characteristic and with the reciprocation of electrical network, the harmonic pollution to assessment charger, design Harmonic and braking measure are most important.Therefore, need to further investigate the harmonic wave analytic modell analytical model of electric automobile battery charger.
Existing analysis charger characteristic method mainly contains: time-domain-simulation, physical analogy etc.But these method amounts of calculation are large, be difficult to analytical Calculation.At present existing literature research the frequency domain analytic modell analytical model of single phase-controlled rectification circuit and uncontrollable rectification circuit, but consider that rectified three-phase circuit is different from single-phase rectifier, there is turn on process twice in its each diode, affected between turn on process by DC load and may occur the situation that charging current is continuous and interrupted in half cycles.This makes the harmonic-model of three phase rectifier more complicated, and the modeling method of single-phase rectifier cannot be applied to electric automobile three phase rectifier charger.
Summary of the invention
For above shortcomings in prior art, the invention provides a kind of modeling method of electric automobile three-phase charger harmonic-model, considered the coupling of terminal voltage and harmonic current, can analyze accurately and effectively AC individual harmonic current.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of modeling method of electric automobile three-phase charger harmonic-model, according to the uncontrollable bridge rectifier equivalent electric circuit of described three-phase, consider that different charge powers cause the continuous and interrupted situation of charging current, the time-domain expression of derivation electric automobile battery charger alternating current;
According to charging current under two of gained kinds of mode of operations, build three-phase charger harmonic wave coupling admittance matrix, wherein, the element in described admittance matrix comprises that terminal voltage harmonic number and current harmonics number of times equate the value when unequal;
Described time domain alternating current is combined with the voltage of charger, propose definite method of model parameter, this model has been considered the coupling of charger terminal voltage and harmonic current, and the element in its admittance matrix does not change with charger harmonic voltage;
According to described calculation method of parameters, in conjunction with constructed coupling admittance matrix, set up the harmonic-model of electric automobile three-phase charger.
As a preferred embodiment of the present invention, according to the uncontrollable bridge rectifier equivalent electric circuit of described three-phase, the time-domain expression of derivation electric automobile battery charger alternating current comprises:
According to the uncontrollable bridge rectifier of described three-phase, there is charging process twice in every phase charging current in half cycles;
According to the operation principle of electric automobile three-phase charger, different charge powers will cause charger to operate in charging current intermittently and continuous two kinds of operating modes;
By described charging process, introduce [α 1, δ 1] and [α 2, δ 2] represent the interrupted conducting interval of alternating current in half cycles, consider that charge power increase will cause charging current continuous, described two conducting intervals are modified to [α 1, δ 2]; α wherein 1be the 1st the charging process angle of flow, δ 1be the 1st charging process angle of cut-off, α 2be the 2nd the charging process angle of flow, δ 2the 2nd charging process angle of cut-off;
By DC side circuit equivalent, according to the given terminal voltage condition of three-phase charger, the time-domain expression of alternating current under the different operating conditions of deriving.
As another kind of preferred version of the present invention, according to charging current under two of gained kinds of mode of operations, build three-phase charger harmonic wave coupling admittance matrix and comprise:
The harmonic number of charger three-phase symmetrical terminal voltage is designated as to h, h=2n+1, n is integer; Line voltage by AC maximum during according to the each conducting of the uncontrollable rectification circuit of three-phase is that DC side is powered, and the harmonic number that pushes away wire voltage is h ', h '=6m+1 and h '=6m '-1, and m is integer, m ' is natural number;
The harmonic number of charger charging current is designated as to k, k=6b+1 and k=6b '-1, b is integer, b ' is natural number; According to h ', whether phase philosophy carries out Fourier transform and is organized into matrix form the charging current under two kinds of working models with k, builds corresponding harmonic wave coupling admittance matrix.
As a modification of the present invention scheme, described time domain alternating current is combined with the voltage of charger, the definite method that proposes model parameter comprises:
According to the uncontrollable rectification circuit of three-phase of given circuit parameter, by three-phase charger charging current, be that 0 o'clock corresponding viewpoint definition is angle of cut-off δ n(n=1,2 represent respectively the 1st, 2 chargings), makes time domain current i accordingly a(t)=0 obtains corresponding parameter;
i a ( δ n / ω ) = 0 ⇒ δ n
The line voltage of direct voltage after finishing according to DC side filter capacitor electric discharge during with lower a pair of diode current flow equates to determine angle of flow α;
According to the 1st, 2 charging process angles of flow of the uncontrollable rectification circuit of three-phase and angle of cut-off, meet δ 2=δ 1+ π/3 and α 1=α 2-π/3, the parameter of charger harmonic-model when acquisition charging current is interrupted;
By the model parameter correction of charging current consecutive hours, according to the intersection point of line voltage, determine the angle of flow of electric current, while considering current continuity, every pair of diode current flow scope is π/3, δ 2=α 2+ π/3 and α 1=α 2-π/3, the parameter of acquisition charging current consecutive hours charger harmonic-model.
As another kind of improvement project of the present invention, according to described calculation method of parameters, in conjunction with constructed coupling admittance matrix, the harmonic-model of setting up electric automobile three-phase charger comprises:
The harmonic wave coupling admittance matrix model of described three-phase charger is noted by abridging;
I K = Y + U h + Y - U h *
Wherein: I kfor AC harmonic current vector, U hand U h *for input harmonics voltage and conjugate vector thereof, Y +and Y -be harmonic wave coupling admittance matrix;
Described harmonic wave coupling admittance matrix model has been considered the coupling of charger terminal voltage and harmonic current, and every order harmonics voltage all can cause the generation of individual harmonic current;
According to given three-phase charger terminal voltage condition, utilize this harmonic wave coupling admittance matrix model directly by algebraic operation, to obtain AC individual harmonic current.
Compared with prior art, the present invention has considered electric automobile battery charger discontinuous current and two kinds of continuous mode of operations under different charge powers, and tool has the following advantages:
1, as DC side filter inductance L fwhile being less than 14.3mH, adopt the error of calculation of charger harmonic current under two kinds of patterns that this model calculates to be less than 10%, can obtain result comparatively accurately.
2, this harmonic wave coupling admittance matrix model has been considered the coupling of charger terminal voltage and harmonic current, and every order harmonics voltage all can cause the generation of individual harmonic current; Matrix element is independent of charger harmonic voltage situation and with it, does not change, only relevant with the angle of flow and the angle of cut-off introduced.
3, the terminal voltage condition of given charger, can directly calculate amplitude and the phase place of the individual harmonic current that is injected into electrical network by this model, calculate easy.
4, this model is applied widely, for the nonlinear rectification load of three-phase, all can adopt this modeling method to revise accordingly harmonic wave coupling admittance matrix, to meet the demands.
5, this model, for the Harmonic characteristic analysis of electric automobile three-phase charger provides model foundation, is the basis that the total harmonic current decay of charging station and enlarge-effect are analyzed.
Accompanying drawing explanation
Fig. 1 is a kind of block diagram of modeling method of electric automobile three-phase charger harmonic-model;
Fig. 2 is electric automobile three-phase charger equivalent electric circuit time domain analysis block diagram;
Fig. 3 is the frequency-domain analysis block diagram of electric automobile three-phase charger.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
A kind of modeling method of electric automobile three-phase charger harmonic-model, according to the uncontrollable bridge rectifier equivalent electric circuit of three-phase, the time-domain expression of derivation electric automobile battery charger alternating current, wherein, this electric current has considered that different charge powers cause the continuous and interrupted situation of charging current, on this basis, charging current under two of gained kinds of mode of operations is carried out to Fourier transform, build three-phase charger harmonic wave coupling admittance matrix, and this admittance matrix comprises that terminal voltage harmonic number and current harmonics number of times equate the value when unequal, consider the combined-voltage of three-phase charger, definite method of model parameter is proposed according to time domain electric current, in conjunction with constructed coupling admittance matrix, set up the harmonic-model of electric automobile three-phase charger, model of the present invention has been considered the coupling of charger terminal voltage and harmonic current, its matrix element does not change with charger harmonic voltage, for analyzing charging station harmonic current containing many chargers with charger number of units, the variation characteristic of charge power provides good theoretical foundation, can directly effectively calculate the harmonic current of electric automobile three-phase charger.
With reference to Fig. 1, Fig. 1 shows the flow chart of a kind of embodiment 1 of electric automobile three-phase charger harmonic-model, and described method can comprise:
Step 1: according to the uncontrollable bridge rectifier equivalent electric circuit of described three-phase, the time-domain expression of derivation electric automobile battery charger alternating current.
Wherein, described charging current expression formula has been considered the continuous and interrupted situation of charging current that different charge powers cause.
It should be noted that, the uncontrollable rectification circuit of three-phase charger has capacitor charging, the two kinds of operating states of discharging, at the capacitor charging state in each cycle, the line voltage of AC maximum is DC side power supply, and every phase charging current exists charging process twice in half cycles.During because of charger underloading or heavy duty, in twice turn on process of half cycles, charging current there will be interrupted and continuous.By α 1, α 2and δ 1, δ 2be designated as conducting and the angle of cut-off of diode the 1st, 2 charging processes in half cycles.Along with the increase of charge power, charging current is by being intermittently changed to continuously, and twice charging process in every half cycle just located to link up in 1/4 cycle.
Seen from the above description α 2>δ 1and α 2≤ δ 1it is respectively the condition of discontinuous current and continuous operation mode.According to known charger three-phase symmetrical terminal voltage, obtain line voltage, by DC side load equivalent, obtain the time-domain expression of charger electric current.
With i afor example, in every half cycles, the conducting interval of charging current is designated as: the interval [α of the 1st charging conducting 1, δ 1] and [α 1+ π, δ 1+ π], the interval [α of conducting of the 2nd charging 2, δ 2] and [α 2+ π, δ 2+ π].Actual electric network voltage comprises some odd harmonic components, and the AC terminal voltage of establishing charger is,
Figure BDA0000406590610000071
In formula: h=2n+1, n be integer (h=1,3,5 ... be odd harmonic number of times), U hwith
Figure BDA0000406590610000074
for h subharmonic voltage effective value and phase place, H is the ceiling voltage harmonic number of research, m=1, and 2,3 represent respectively a, b, c three-phase.
Interval [the α of the 1st charging conducting 1, δ 1] and [α 1+ π, δ 1+ π] in, line voltage u abfor DC side power supply; Interval [the α of the 2nd charging conducting 2, δ 2] and [α 2+ π, δ 2+ π] in, line voltage u acfor DC side power supply, by DC side load equivalent, the time-domain expression of derivation charger electric current is,
1), when charging current is interrupted, alternating current expression formula is:
Figure BDA0000406590610000072
In formula: U hwith for charger terminal voltage effective value and phase place, G hand θ hamplitude and phase place for DC side equivalent admittance.
2) charging current is continuous
Charging current consecutive hours i aexpression formula constant, but its alternating current conducting interval is [α 1, δ 2] and [α 1+ π, δ 2+ π].
Step 2: according to charging current under two of gained kinds of mode of operations, build three-phase charger harmonic wave coupling admittance matrix.
Wherein, described admittance matrix element comprises that terminal voltage harmonic number and current harmonics number of times equate the value when unequal.
It should be noted that, the uncontrollable rectification circuit of three-phase bridge only contains k=1,5,7 ... (k=6b+1 and k=6b '-1, b is integer, b ' is natural number) inferior current harmonics, and number of times h '=1 of line voltage, 5,7,11,13....(h '=6m+1 and h '=6m '-1, m is integer, m ' is natural number) be odd number, thereby h ' ± k is even number.For h ', whether equate with k, by a phase current i a(t) fourier expansion in one-period, obtains its k primary current harmonic phasor
Figure BDA00004065906100000810
for,
I · ak = 2 T ∫ 0 T i a ( t ) e - jkωt dt
When h ≠ k, k primary current harmonic wave is,
Figure BDA0000406590610000082
Figure BDA0000406590610000083
Figure BDA0000406590610000084
Figure BDA0000406590610000085
When h=k, k primary current harmonic wave is,
Figure BDA0000406590610000086
Figure BDA0000406590610000087
Figure BDA0000406590610000088
1) coupling admittance matrix
By described I akbe organized into matrix form,
Figure BDA0000406590610000091
2) matrix element:
Matrix element when 1. charging current is interrupted
Y k , h + = 3 G h π e j ( π 6 r + θ h ) e j ( h - k ) δ 1 - e j ( h - k ) α 1 j ( h - k ) + 3 G h π e j ( - π 6 r + θ h ) e j ( h - k ) δ 2 - e j ( h - k ) α 2 j ( h - k ) , h ≠ k
Y k , h + = 3 G h π e j ( π 6 r + θ h ) ( δ 1 - α 1 ) + 3 G h π e j ( - π 6 r + θ h ) ( δ 2 - α 2 ) , h = k
Y k , h - = - 3 G h π e - j ( π 6 r + θ h ) e - j ( h + k ) δ 1 - e - j ( h + k ) α 1 j ( h - k ) - 3 G h π e - j ( - π 6 r + θ h ) e - j ( j + k ) δ 2 - e - j ( h + k ) α 2 j ( h + k )
In formula: r=1 (h=1,7,13 ...) and-1 (h=5,11,17 ...), subscript+,-expression and voltage, admittance matrix element that voltage conjugation is relevant.
2. the matrix element of charging current consecutive hours
Y k , h + = 3 G h π e j ( π 6 r + θ h ) e j ( h - k ) α 2 - e j ( h - k ) α 1 j ( h - k ) + 3 G h π e j ( - π 6 r + θ h ) e j ( j - k ) δ 2 - e j ( h - k ) α 2 j ( h - k ) , h ≠ k
Y k , h + = 3 G h π e j ( π 6 r + θ h ) ( α 2 - α 1 ) + 3 G h π e j ( - π 6 r + θ h ) ( δ 2 - α 2 ) , h = k
Y k , h - = - 3 G h π e - j ( π 6 r + θ h ) e - j ( h + k ) α 2 - e - j ( h + k ) α 1 j ( h + k ) - 3 G h π e - j ( - π 6 r + θ h ) e - j ( j + k ) δ 2 - e - j ( h + k ) α 2 j ( h + k )
Step 3: described time domain alternating current is combined with the voltage of charger, propose model
Determination method for parameter.
Wherein, described model has been considered the situation that charging current is interrupted and continuous.
It should be noted that, the maximum conducting scope of the each charging process of the uncontrollable rectification circuit of three-phase is π/3, and in addition, the intersection point of charging current consecutive hours line current has determined the corresponding angle of flow and the angle of cut-off in its conducting interval.
1) charging current is interrupted
1. angle of cut-off δ 1and δ 2: in conducting interval, capacitor charging electric current is that 0 o'clock corresponding angle is angle of cut-off.
i a ( δ n / ω ) = 0 ⇒ δ n By i a(δ n/ ω)=0 derives δ n;
In formula: n=1,2 represent respectively charging process the 1st, 2 times.
2. angle of flow α 1and α 2: according to capacitor discharge, finish rear direct voltage U dcline voltage during with lower a pair of diode current flow equates to determine the angle of flow.With angle of flow α 2for example,
u ab ( δ 1 / ω ) e - ( α 2 - δ 1 ) / ( ωRC ) = u ac ( α 2 / ω ) ⇒ α 2
For the 1st, 2 charging process angles of flow of the uncontrollable rectification circuit of three-phase and angle of cut-off, also meet δ 2=δ 1+ π/3 and α 1=α 2-π/3, can obtain the parameter of charging current charger harmonic-model when interrupted accordingly.
2) charging current is continuous
Charging current consecutive hours can directly determine that by the intersection point of line voltage the conducting of electric current is interval,
u ab ( α 2 / ω ) = u ac ( α 2 / ω ) ⇒ α 2
Cause now every pair of diode current flow scope is π/3, δ 2=α 2+ π/3 and α 1=α 2-π/3, can obtain the parameter of charging current consecutive hours charger harmonic-model accordingly.
Step 4: according to described calculation method of parameters, in conjunction with constructed coupling admittance matrix, set up the harmonic-model of electric automobile three-phase charger.
Described harmonic wave coupling admittance matrix and model parameter calculations incorporated are got up, are the harmonic wave coupling admittance matrix model of electric automobile three-phase charger:
I K = Y + U h + Y - U h *
In formula: I kfor AC harmonic current vector, U hand U h *for input harmonics voltage and conjugate vector thereof, Y +and Y -be harmonic wave coupling admittance matrix.
It should be noted that, the harmonic-model of described electric automobile three-phase charger has been considered the situation that charging current is interrupted and continuous, charger terminal voltage and individual harmonic current are coupled together, matrix element is independent of terminal voltage and with it, does not change, the terminal voltage of given electric automobile battery charger, can directly calculate by this harmonic wave coupling admittance matrix model the individual harmonic current I that electric automobile battery charger under different charge powers injects electrical network effectively k(k is current harmonics number of times, k=1, and 5,7 ...).
With reference to Fig. 2, Fig. 2 shows a kind of time domain analysis schematic diagram of electric automobile three-phase charger equivalent electric circuit, can comprise:
Step 1: according to the equivalent electric circuit of electric automobile three-phase charger, given charger terminal voltage condition.
Wherein, described charger terminal voltage comprises odd harmonic.
Step 2: terminal voltage can be become to pulsating dc voltage at charger DC capacitor adnation after rectifier.
Wherein, described direct voltage is pulsed six times in a cycle, and the waveform of each pulsation is all the same.
Step 3: described direct voltage is acted on to load and produce direct current, then through rectifier and AC network coupling.
Step 4: the coupling according to described alternating current-direct current side, causes rectifier alternating current generation harmonic distortion.
With reference to Fig. 3, Fig. 3 shows a kind of frequency-domain analysis schematic diagram of electric automobile three-phase charger, can comprise:
Step 1: according to the equivalent electric circuit of electric automobile three-phase charger, given charger terminal voltage condition.
Step 2: according to described modeling method, build the harmonic wave coupling admittance matrix of charger, determine model parameter, set up the harmonic-model of electric automobile three-phase charger.
Step 3: described terminal voltage conditioning can directly be obtained to amplitude and the phase place of the individual harmonic current of charger AC in this model.
Wherein, according to described charger terminal voltage and harmonic-model, by algebraic operation, try to achieve individual harmonic current.
Except effectively calculating charger, inject the harmonic current of electrical network, described model provides model foundation for analyzing the harmonic characterisitic of electric automobile three-phase charger, can to the total harmonic current decay of charging station and enlarge-effect, carry out quantitative analysis better.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.

Claims (5)

1. the modeling method of an electric automobile three-phase charger harmonic-model, it is characterized in that, according to the uncontrollable bridge rectifier equivalent electric circuit of described three-phase, consider that different charge powers cause the continuous and interrupted situation of charging current, the time-domain expression of derivation electric automobile battery charger alternating current;
According to charging current under two of gained kinds of mode of operations, build three-phase charger harmonic wave coupling admittance matrix, wherein, the element in described admittance matrix comprises that terminal voltage harmonic number and current harmonics number of times equate the value when unequal;
Described time domain alternating current is combined with the voltage of charger, propose definite method of model parameter, this model has been considered the coupling of charger terminal voltage and harmonic current, and the element in its admittance matrix does not change with charger harmonic voltage;
According to described calculation method of parameters, in conjunction with constructed coupling admittance matrix, set up the harmonic-model of electric automobile three-phase charger.
2. the modeling method of a kind of electric automobile three-phase charger harmonic-model according to claim 1, is characterized in that: according to the uncontrollable bridge rectifier equivalent electric circuit of described three-phase, the time-domain expression of derivation electric automobile battery charger alternating current comprises:
According to the uncontrollable bridge rectifier of described three-phase, there is charging process twice in every phase charging current in half cycles;
According to the operation principle of electric automobile three-phase charger, different charge powers will cause charger to operate in charging current intermittently and continuous two kinds of operating modes;
By described charging process, introduce [α 1, δ 1] and [α 2, δ 2] represent the interrupted conducting interval of alternating current in half cycles, consider that charge power increase will cause charging current continuous, described two conducting intervals are modified to [α 1, δ 2]; α wherein 1be the 1st the charging process angle of flow, δ 1be the 1st charging process angle of cut-off, α 2be the 2nd the charging process angle of flow, δ 2the 2nd charging process angle of cut-off;
By DC side circuit equivalent, according to the given terminal voltage condition of three-phase charger, the time-domain expression of alternating current under the different operating conditions of deriving.
3. the modeling method of a kind of electric automobile three-phase charger harmonic-model according to claim 1, is characterized in that: according to charging current under two of gained kinds of mode of operations, build three-phase charger harmonic wave coupling admittance matrix and comprise:
The harmonic number of charger three-phase symmetrical terminal voltage is designated as to h, h=2n+1, n is integer; Line voltage by AC maximum during according to the each conducting of the uncontrollable rectification circuit of three-phase is that DC side is powered, and the harmonic number that pushes away wire voltage is h ', h '=6m+1 and h '=6m '-1, and m is integer, m ' is natural number;
The harmonic number of charger charging current is designated as to k, k=6b+1 and k=6b '-1, b is integer, b ' is natural number; According to h ', whether phase philosophy carries out Fourier transform and is organized into matrix form the charging current under two kinds of working models with k, builds corresponding harmonic wave coupling admittance matrix.
4. the modeling method of a kind of electric automobile three-phase charger harmonic-model according to claim 1, is characterized in that: described time domain alternating current is combined with the voltage of charger, and the definite method that proposes model parameter comprises:
According to the uncontrollable rectification circuit of three-phase of given circuit parameter, by three-phase charger charging current, be that 0 o'clock corresponding viewpoint definition is angle of cut-off δ n(n=1,2 represent respectively the 1st, 2 chargings), makes time domain current i accordingly a(t)=0 obtains corresponding parameter;
i a ( δ n / ω ) = 0 ⇒ δ n
In formula: ω is the specified angular frequency of electrical network.
The line voltage of direct voltage after finishing according to DC side filter capacitor electric discharge during with lower a pair of diode current flow equates to determine angle of flow α;
According to the 1st, 2 charging process angles of flow of the uncontrollable rectification circuit of three-phase and angle of cut-off, meet δ 2=δ 1+ π/3 and α 1=α 2-π/3, the parameter of charger harmonic-model when acquisition charging current is interrupted;
By the model parameter correction of charging current consecutive hours, according to line voltage u aband u acintersection point determine the angle of flow α of electric current 2, while considering current continuity, every pair of diode current flow scope is π/3, δ 2=α 2+ π/3 and α 1=α 2-π/3, the parameter of acquisition charging current consecutive hours charger harmonic-model.
5. the modeling method of a kind of electric automobile three-phase charger harmonic-model according to claim 1, it is characterized in that: according to described calculation method of parameters, in conjunction with constructed coupling admittance matrix, the harmonic-model of setting up electric automobile three-phase charger comprises:
The harmonic wave coupling admittance matrix model of described three-phase charger is noted by abridging;
I K = Y + U h + Y - U h *
Wherein: I kfor AC harmonic current vector, U hand U h *for input harmonics voltage and conjugate vector thereof, Y +and Y -be harmonic wave coupling admittance matrix;
Described harmonic wave coupling admittance matrix model has been considered the coupling of charger terminal voltage and harmonic current, and every order harmonics voltage all can cause the generation of individual harmonic current;
According to given three-phase charger terminal voltage condition, utilize this harmonic wave coupling admittance matrix model directly by algebraic operation, to obtain AC individual harmonic current.
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CN104569528A (en) * 2014-12-25 2015-04-29 国网重庆市电力公司永川供电分公司 Electric energy charging method considering harmonic wave electric energy loss of load
CN105608285A (en) * 2016-01-11 2016-05-25 浙江中新电力发展集团有限公司 Circuit-analysis-based static load modeling method for three-phase rectifier equipment
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CN107122553A (en) * 2017-05-02 2017-09-01 国网山东省电力公司电力科学研究院 Consider the charger Harmonic characteristic analysis emulation mode of stochastic behaviour
CN109446643A (en) * 2018-10-26 2019-03-08 山东大学 A method of household electrical appliance Load harmonic model is established based on measured data
CN109597334A (en) * 2018-12-05 2019-04-09 合肥能安科技有限公司 A kind of Internet of Things intelligent monitoring device of electric vehicle
CN109995034A (en) * 2019-01-28 2019-07-09 西安交通大学 A method of considering that the regional grid harmonic synthesis of Harmonic coupling characteristic is administered
CN114442508A (en) * 2021-12-24 2022-05-06 中车永济电机有限公司 Three-level bidirectional DC-DC charger modeling method
CN114814335A (en) * 2022-04-15 2022-07-29 山东大学 6-pulse rectifier harmonic current evaluation method under three-phase unbalanced operation condition
CN114935688A (en) * 2022-07-25 2022-08-23 山东大学 Electric arc furnace power supply system harmonic evaluation method and system based on power segmentation
CN115102168A (en) * 2022-08-24 2022-09-23 山东大学 Time-varying current evaluation method and system considering distributed photovoltaic harmonic coupling

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101674023A (en) * 2009-07-13 2010-03-17 华南理工大学 Harmonic resolution method of alternating-current/direct-current interconnection system
US20100244773A1 (en) * 2009-03-27 2010-09-30 Gm Global Technology Operations, Inc. Unity power factor isolated single phase matrix converter battery charger
CN102611289A (en) * 2012-03-21 2012-07-25 东北大学 Instantaneous harmonic estimation and compensation type single-phase inverter power supply and control method of single-phase inverter power supply

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100244773A1 (en) * 2009-03-27 2010-09-30 Gm Global Technology Operations, Inc. Unity power factor isolated single phase matrix converter battery charger
CN101674023A (en) * 2009-07-13 2010-03-17 华南理工大学 Harmonic resolution method of alternating-current/direct-current interconnection system
CN102611289A (en) * 2012-03-21 2012-07-25 东北大学 Instantaneous harmonic estimation and compensation type single-phase inverter power supply and control method of single-phase inverter power supply

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
周念成 蒲松林: "电动汽车快速充电站的储能缓冲***控制策略", 《电力***保护与控制》 *

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CN104569528A (en) * 2014-12-25 2015-04-29 国网重庆市电力公司永川供电分公司 Electric energy charging method considering harmonic wave electric energy loss of load
CN104569528B (en) * 2014-12-25 2017-03-29 国网重庆市电力公司永川供电分公司 A kind of electric energy tariffing method of the harmonic electric energy loss of meter and load
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CN106451448A (en) * 2016-10-10 2017-02-22 国家电网公司 Three-phase bridge-type rectifier load harmonic superposition method based on capacitor filtering
CN106451448B (en) * 2016-10-10 2019-03-29 国家电网公司 Three-phase bridge rectification type Load harmonic stacking method based on capacitor filtering
CN107122553B (en) * 2017-05-02 2021-11-05 国网山东省电力公司电力科学研究院 Charger harmonic characteristic analysis simulation method considering random characteristic
CN107122553A (en) * 2017-05-02 2017-09-01 国网山东省电力公司电力科学研究院 Consider the charger Harmonic characteristic analysis emulation mode of stochastic behaviour
CN109446643A (en) * 2018-10-26 2019-03-08 山东大学 A method of household electrical appliance Load harmonic model is established based on measured data
CN109446643B (en) * 2018-10-26 2020-10-30 山东大学 Method for establishing household appliance load harmonic model based on measured data
CN109597334A (en) * 2018-12-05 2019-04-09 合肥能安科技有限公司 A kind of Internet of Things intelligent monitoring device of electric vehicle
CN109995034A (en) * 2019-01-28 2019-07-09 西安交通大学 A method of considering that the regional grid harmonic synthesis of Harmonic coupling characteristic is administered
CN109995034B (en) * 2019-01-28 2021-01-19 西安交通大学 Regional power grid harmonic comprehensive treatment method considering harmonic coupling characteristics
CN114442508A (en) * 2021-12-24 2022-05-06 中车永济电机有限公司 Three-level bidirectional DC-DC charger modeling method
CN114442508B (en) * 2021-12-24 2023-09-08 中车永济电机有限公司 Modeling method of three-level bidirectional DC-DC charger
CN114814335A (en) * 2022-04-15 2022-07-29 山东大学 6-pulse rectifier harmonic current evaluation method under three-phase unbalanced operation condition
CN114935688A (en) * 2022-07-25 2022-08-23 山东大学 Electric arc furnace power supply system harmonic evaluation method and system based on power segmentation
CN114935688B (en) * 2022-07-25 2022-10-14 山东大学 Electric arc furnace power supply system harmonic evaluation method and system based on power segmentation
CN115102168A (en) * 2022-08-24 2022-09-23 山东大学 Time-varying current evaluation method and system considering distributed photovoltaic harmonic coupling

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