CN110112818A - A kind of progress control method and system of vehicle-mounted photovoltaic system solar converter - Google Patents

A kind of progress control method and system of vehicle-mounted photovoltaic system solar converter Download PDF

Info

Publication number
CN110112818A
CN110112818A CN201910388041.5A CN201910388041A CN110112818A CN 110112818 A CN110112818 A CN 110112818A CN 201910388041 A CN201910388041 A CN 201910388041A CN 110112818 A CN110112818 A CN 110112818A
Authority
CN
China
Prior art keywords
current state
voltage
state
mation
photovoltaic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201910388041.5A
Other languages
Chinese (zh)
Other versions
CN110112818B (en
Inventor
周熙炜
孙成浩
赵祥模
汪贵平
闫茂德
李登峰
林海
蒙一扬
陈勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changan University
Original Assignee
Changan University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Changan University filed Critical Changan University
Priority to CN201910388041.5A priority Critical patent/CN110112818B/en
Publication of CN110112818A publication Critical patent/CN110112818A/en
Application granted granted Critical
Publication of CN110112818B publication Critical patent/CN110112818B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/66—Regulating electric power
    • G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Photovoltaic Devices (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

The invention belongs to field of photovoltaic power generation, more particularly to the progress control method and system of a kind of vehicle-mounted photovoltaic system solar converter, system includes microprocessor module, photovoltaic battery module, one-stage transfor-mation device module and two-dimensional transform device module, according to the flash-over characteristic of photovoltaic cell, the operability that the illumination particularity and general-utility car of vehicle-mounted photovoltaic system are adapted as solar charging electric car is set out, control is grouped by one-stage transfor-mation device by the photovoltaic cell of different illumination conditions to car body surface to interfere with each other to reduce, realize that one-stage transfor-mation device electrical output power maximizes, using the improvement control algolithm of suitable automobile light conditions, realize that one-stage transfor-mation device electrical output power is maximum.Stable output power and maximization are realized using the control algolithm of two-dimensional transform device and its adaptation again.The characteristics of this new controller, is easy in conjunction with vehicle-mounted photovoltaic system, effectively increases photovoltaic system active power, electric power output is convenient for regulation.

Description

A kind of progress control method and system of vehicle-mounted photovoltaic system solar converter
Technical field
The invention belongs to field of photovoltaic power generation, and in particular to a kind of operation control of vehicle-mounted photovoltaic system solar converter Method and system.
Background technique
Photovoltaic power generation technology and industry are not only an important supplement of the current energy, more standby to become the following main energy sources The potentiality in source.In the long run, the Utilization prospects of solar energy are best, and potentiality are maximum.In the past 30 years, solar utilization technique exists It researchs and develops, commercially produce, all obtaining tremendous development in terms of market development, it is quick, stable development emerging to become the world One of industry.And solar energy power generating therein be in the world it is energy saving, advocate green electric power supply one kind it is main high-new Technical industry.Develop photovoltaic industry oneself become world community solve between the energy and economic development, environmental protection it is contradictory most One of good approach.
Vehicle-mounted photovoltaic system is solar power energy source of car system.Photovoltaic cell converts the solar into electric energy, to Engine and automotive accessory operation.Photovoltaic system cleanliness without any pollution can effectively save vehicle fuel consumption.But the sun Motility automobile only accounts for existing automobile market very little part.General-utility car there is no suitable installation photovoltaic system scheme.
In traditional centralized photovoltaic system, multiple photovoltaic cells are connected into photovoltaic string, to reach certain voltage level. Parallel connected photovoltaic string is connected to the photovoltaic converter of a concentration, as shown in Figure 1.This photovoltaic converter is used to connect Photovoltaic array and dc bus.
In actual environment, the output power of photovoltaic array is influenced by intensity of sunshine and temperature.In external ambient stable In the case of, the output of photovoltaic array also can be affected by a load.When only external loading and photovoltaic array reach impedance matching, light Photovoltaic array just understands Maximum Power Output, this is that the operating point of photovoltaic array is known as maximum power point (MPP).In order to make photovoltaic array Efficiency highest is exported, needs to constantly regulate the operating point of photovoltaic array according to the transformation of external environment and load, this process claims For MPPT maximum power point tracking (Maximun Power Point Tracking, MPPT).It is filled to make automobile storage battery obtain maximum Electrical power need to carry out load matched appropriate.
Fig. 2 illustrate the centralized photovoltaic systems of 3 × 10 array scales exact matching under the conditions of Incomplete matching P-V curve.It can be seen that centralized photovoltaic system easily reaches MPP under the conditions of exact matching.Once it mismatches, even if System operates on highest MPP P1, and system can only also export 4085W, and at this time since the operating point of A, B are inclined with MPP respectively From a large amount of available power (12.56%) can not export.
A photovoltaic converter has only been used in this connection method, and structure is simple, easily controllable.At all photovoltaic cells Under same light environment when (usually inclined roof), maximum power output can achieve.But this system is in each photovoltaic When battery is in different illumination intensity, there are a large amount of available powers to export, and efficiency is lower, is not suitable for vehicle-mounted photovoltaic system light According to the changeable situation of environment.
Photovoltaic array output voltage and non-linear strong as the transformation of external environment and load has of output electric current.Light Photovoltaic array output is as shown in Figure 3 with the variation of intensity of illumination and temperature.It will be clear that output electric current is with sunshine in figure Reduction and reduce, but cell output voltage is little as the variation of sunshine changes.With the previous case on the contrary, temperature is to battery The influence of output voltage is much larger than electric current.That is, battery tends to export higher voltage with lower temperature.However, A specific position is given, in predictable range, temperature change is relatively small.Solar irradiance variation is very violent, Thus it is affected to the variation of battery behavior.
Difference based on controlled variable, algorithm can be divided into following three types:
(i) array voltage is controlled
Most common control variable is photovoltaic array voltage.As shown in Fig. 4 (a), under different array voltages, operating point is along P- V curve movement.Therefore, only array voltage need to simply be controlled, so that it may realize the tracking to MPP.Control structure It is simple to indicate as shown in Fig. 4 (b).
MPPT module output array voltage reference value when array voltage is fed back, and applied voltage circuit makes it follow reference Value changes.In this way, array operating point in special time period just it is anticipated that determine.In addition, also by the attached of array output electric current Add information input MPPT module, the array output power of present operating point is calculated and monitored.Once obtaining current work The information of point, MPPT will adaptively change voltage reference value, keep operating point mobile to predictable new operating point.In this base On plinth, the power of new operating point is obtained, and compared with former situation.If power increases, voltage reference It will change in the same direction and direction, otherwise, change in the opposite direction.Above-mentioned typical MPPT process is utilized to array electricity The control of pressure.
It is exported using voltage as the advantages of control variable from the photovoltaic array under the conditions of above-mentioned different irradiation level Characteristic is closely related.Since MPP voltage changes less when sunlight quickly changes, once tracking MPP, voltage control is changing spoke Higher MPPT performance is more likely kept under light situation.
(ii) array current is controlled
Once we have been familiar with voltage control MPPT, the MPPT based on current control equally be will be understood by.Uniquely Difference be select electric current as control variable rather than voltage.Therefore, MPPT module array exports current reference value, and application electricity Stream circulation makes array current follow reference value.
Fig. 5 (a) is power-current curve, and Fig. 5 (b) is the simple expression of current control MPPT.It should be noted that MPP The power curve on right side declines by a big margin, and the minor change of electric current will lead to the large change of power.Further, since photovoltaic battle array With the quick variation of sunlight significant change can occur for the MPP electric current of column, therefore in this case, current control performance It is poor.Based on the above reasons, current control is not fine.
(iii) duty ratio is controlled
A kind of straightforward procedure for realizing MPPT is to directly control or adjust the duty ratio of photovoltaic converter.Fig. 6 is photovoltaic change When parallel operation Boost topology and DC bus-bar voltage desired constant, the relationship of duty ratio and array output power.Assuming that the converter It is run in CCM, then the converter outputs and inputs voltage and should have following relationship.
The P-D curve as shown in Fig. 6 (a) can be derived that P-D curve, adjustment PV converter are accounted for by P-V curve before Sky will lead to array operating point than period along curve movement.It may then pass through previously described similar procedure and progressively reach MPP.
Directly the advantages of adjustment duty ratio is that method is simple.Without closed-loop control, stringent voltage or electric current can be realized MPPT is realized in control.However, the disadvantage is that quite apparent.Since we obtain the P-D curves in Fig. 6, it is assumed that converter Output is fixed on constant voltage DC bus, will be gone wrong when the voltage of DC bus changes.Different straight It flows under busbar voltage, actual P-D curve can occur to change accordingly.Importantly, reaching the optimum taking air ratio period of MPP It will change with the variation of DC bus-bar voltage.Therefore, even if sunlight and temperature remain unchanged, MPP reaches certain duty Than if duty ratio turnover rate is not fast enough, the variation of DC bus-bar voltage easilys lead to operating point and deviates MPP.In other words, The performance of MPPT is not only influenced by environment, is also influenced by loading condition.This problem is in voltage control and electric current control Do not occur in system.
Selection in addition to controlling variable, the algorithm of MPPT also play an important role.The various methods of MPPT are extensive It is all described in document.However, most widely used and practical MPPT method is as follows in all methods.
Algorithm one: constant pressure tracing (CVT).In photovoltaic module MPPT maximum power point tracking algorithm, CVT is the simplest one Kind method.When temperature is constant, the maximum power of photovoltaic cell point under different light intensity is substantially near same vertical line, such as Fig. 7 institute Show.That is, ignoring the influence of temperature, maximum power point voltage varies less under the conditions of different irradiation level.By certain Impedance transformation, so that photovoltaic cell is worked in a constant voltage always, i.e. this moment maximum power point voltage, here it is constant pressures (CVT) method of tracking.Constant pressure tracing is a kind of approximate maximum point-tracking method.
As shown in Figure 7, MPP voltage of this method based on measurement voltage actual measurement is point of photovoltaic array open-circuit voltage Number, can be described as following equation, wherein k is between 0.71-0.78.
Vm=k × Voc (2)
Under different irradiation level, the index variation is little, as shown in fig. 7, MPP voltage is declined slightly when illumination weakens. Since open-circuit voltage also accordingly reduces, so the ratio of MPP voltage and open-circuit voltage is maintained at k on each curve, Voc can pass through Photovoltaic array open circuit measurement.Therefore, MPP voltage can be obtained by open-circuit voltage multiplied by coefficient k.
This method advantage is that control strategy is simple, and stability is high, it is easy to accomplish, it is common in easy family's photovoltaic system In.However this method have the shortcomings that certain difficult point and.The necessary open circuit measurement of ratio k, it is therefore necessary to which manual intervention could be good Good luck row can not accomplish automatic measurement.And in when being not easy the environment measured, this method loses meaning.Simultaneously as It is approximate maximum power point tracing method, k value only rule of thumb summary value can not be determined accurately, so energy loss is larger.
Algorithm two: perturbation observation method (Perturb&Observe, PO).PO algorithm is a kind of widely used control Algorithm, the algorithm is based on the concept climbed the mountain.Its principle be at regular intervals, with certain step-size change reference voltage value, from And output voltage is made to increase or reduce.Constantly change photovoltaic system operating point by this method, is finally reached maximum power Point.Assuming that following equations can be used to describe the principle of PO when voltage is antenna array control variable:
If the operating point of photovoltaic array is mobile to the increased direction of power, move operating point further to the same direction It is dynamic.
By taking voltage controls MPPT as an example, voltage disturbance is applied to array voltage benchmark.Assuming that current work point is at A, As shown in figure 8, voltage is disturbed from A to B, when P (B) is greater than P (A), detect that power increases.According to the algorithm, as long as power Increasing, so that it may think operating point to being correctly oriented, i.e. the direction of power increase is mobile, in next step just in identical side Apply disturbance upwards.Therefore, after several steps, operating point will be mobile to MPP and reaches MPP.Another voltage disturbance will lead to Power drops to C from MPP, because P (C) is less than P (B), algorithm identification point is mobile to the direction of mistake again.Then algorithm is determined It is fixed to invert perturbation direction, so that operating point is returned to MPP.
The advantages of PO method is that algorithm structure is relatively easy, it is easy to accomplish.The disadvantage is that the algorithm is in fast-changing irradiation Failure is easy under the conditions of degree.As shown in Figure 9, it is assumed that initial irradiation level is S1, reaches MPPT, and operating point reaches A (MPP1) at this time, Algorithm will further apply disturbance to the left.At this point, irradiation level starts to continue to increase from S1 to S2.Operating point is moved from B point at this time C point is moved, algorithm detects that changed power is positive, therefore algorithm further moves to left voltage.With being continuously increased for irradiation level, Operating point is moved to E, since this process makes operating point deviate from MPP3, so the MPPT performance of PO and bad.
Algorithm three: conductance control methods.It is determined most compared with the size of increment conductance (g) by the absolute value of conductance (G) High-power point.As shown in Figure 10, it is assumed that in the case of static irradiation, at MPP, G is equal to-g.Therefore, if detecting this feelings Condition is considered as having found MPP.If G is greater than-g, operating point should be in the left side of MPP.Otherwise, if G is less than-g, it is just On the right of MPP.Its algorithm can be represented by the formula:
The value of conductance increment method reference voltage depends on previous moment G compared with-g size, not by the shadow of voltage swing It rings.Relative to PO algorithm, the case where conductance increment method can preferably adapt to illumination variation.It is opposite, due to G magnitude very It is small, requirement of the algorithm to the MCU speed of service and to the more demanding of sensor accuracy.
Algorithm four: fuzzy control.The output of photovoltaic cell has complicated nonlinear characteristic, by illumination amplitude, temperature Degree, the factors such as photovoltaic cell hardware condition influence, and external environment variation it is difficult to predict.With the development of intelligent algorithm, obscure The features such as control has shown photovoltaic system adaptable, and robustness is good, does not depend on the accurate model of controlled device.
FUZZY ALGORITHMS FOR CONTROL needs to execute in dsp, and main includes the content of the following aspects:
(1) input variable and output variable of fuzzy controller are determined；
(2) conclude and summarize the control rule of fuzzy controller；
(3) method of blurring and anti fuzzy method is determined；
(4) it selects domain and determines related parameter.
FUZZY ALGORITHMS FOR CONTROL has many advantages, such as that robustness is good, and precision is high, but can only execute in digital signal processor, firmly Part higher cost.
The shortcomings that above-mentioned algorithm limits constant pressure tracing, perturbation observation method, conductance control methods, fuzzy control etc. can not The case where irradiation level acute variation suitable for vehicle-mounted photovoltaic system.
Summary of the invention
The purpose of the present invention is to provide the progress control method and system of a kind of vehicle-mounted photovoltaic system solar converter, To solve the problems such as solar converter in the prior art can not adapt to the deficiency of vehicle-mounted photovoltaic system.
In order to realize above-mentioned task, the invention adopts the following technical scheme:
A kind of progress control method of vehicle-mounted photovoltaic system solar converter, includes the following steps:
Step 1: situation being illuminated by the light according to surface of vehicle and carries out subregion, every area is laid with photovoltaic cell group；
Step 2: becoming the output voltage of each area's photovoltaic cell group of current state as the level-one of each area's photovoltaic cell group The input voltage of parallel operation；
Step 3: judge whether the system of current state reaches maximum power output state:
If system is not up to maximum power output state, by the reversed disturbance conductance control algolithm of variable step to current The input voltage of the one-stage transfor-mation device of each area's photovoltaic cell group of state is handled, and each area's photovoltaic cell group of current state is obtained Level-one reference voltage value, the level-one reference voltage value of the area Bing Jiangge photovoltaic cell group is controlled by PWM wave changes one-stage transfor-mation device Switching frequency, update each area's photovoltaic cell group of current state one-stage transfor-mation device input voltage, return step 3, simultaneously will The level-one reference voltage value of each area's photovoltaic cell group of current state is cumulative, obtains current state one-stage transfor-mation device output voltage, holds Row step 4；
If system reaches maximum power output state, step 4 is directly executed；
Step 4: the output voltage for the current state one-stage transfor-mation device that step 3 is obtained is as current state two-dimensional transform device Input voltage；
Step 5: judge whether the system of current state reaches stable output state:
If system not up to stablizes output state, pass through input of the resistance control algolithm to current state two-dimensional transform device Voltage is handled, and obtains the second level reference resistance of current state, and the second level reference resistance of current state is passed through PWM Wave controls the switching frequency of two-dimensional transform device, updates the input voltage of current state two-dimensional transform device, repeats step 5；
If system reaches stable output state, and system reaches maximum power output state, then terminates, otherwise return step 3。
Further, the reversed disturbance conductance control algolithm by variable step is to each area's photovoltaic cell of current state The input voltage of the one-stage transfor-mation device of group is handled, and the level-one reference voltage value of each area's photovoltaic cell group of current state is obtained, It specifically includes:
It is handled using input voltage of the formula I to each area's photovoltaic cell group one-stage transfor-mation device, it is every to obtain current state The level-one reference voltage value V of one area's photovoltaic cell groupref1(k):
Wherein, k indicates current state, and k-1 indicates previous state, and k-2 indicates preceding previous state, Δ V1(k) indicate current The increment reference voltage of the one-stage transfor-mation device of state, V1(k) input voltage of the one-stage transfor-mation device of current state, I are indicated1(k) table Show the input current of the one-stage transfor-mation device of current state, Δ P1(k) the increment input work of the one-stage transfor-mation device of current state is indicated Rate, and Δ P1(k)=I1(k)V1(k)-I1(k-1)V1(k-1), H1(k) coefficient continuously reversely disturbed, H are indicated1(k)=- abs (sign(sign(ΔP1(k))+sign(ΔP1(k-1))), if continuous reversed disturbance, H1(k)=- 1, otherwise H1(k)=0, C (k) adjustment factor of current state, C (k)=(1+H are indicated1(k-2))C-H1(k-2) C (k-2) C, C indicate regulatory factor, G1 (k) current state output conductance and G are indicated1(k)=I1(k)/V1(k), g1(k) the increment electricity of the disturbance sum of current state is indicated It leads and g1(k)=(I1(k)-I1(k-1))/(V1(k)-V1(k-1))；
Wherein, work as RSN'/RSNWhen >=1.5, enables the level-one reference voltage of current state disturb step delta λ (k) and increase, wherein RSNEquivalent series resistance when dispatching from the factory for photovoltaic cell group in the case of STC, RSN' for by the output of the one-stage transfor-mation device of current state Voltage and output electric current calculate the current state equivalent series resistance obtained；Otherwise the level-one reference voltage of current state disturbs step Long Δ λ (k) is constant.
Further, regulatory factor C is calculated by formula III,
Wherein,Indicate the proportionality coefficient of maximum power point voltage and open-circuit voltage, value 0.71-0.78, VOCM expression Maximum open circuit voltage, Δ λ (k) value are that 0.5~2, γ indicates that the acceptable time extends coefficient and γ > 150%.
It is further, described to be handled by input voltage of the resistance control algolithm to current state two-dimensional transform device, The second level reference resistance for obtaining current state, specifically includes:
It is handled using input voltage of the formula II to current state two-dimensional transform device, obtains the second level reference of current state Resistance value RSref2(k),
RSref2(k)=RSref2(k-1)+ΔRSref2(k) formula II
Wherein, k indicates current state, and k-1 indicates previous state, and k-2 indicates preceding previous state, R2(k) current shape is indicated State second level variator input resistance value, R2(k)=V2(k)/I2(k), V2(k) input of the two-dimensional transform device of current state is indicated Voltage value, I2(k) input current value of the two-dimensional transform device of current state, Δ P are indicated2(k)=I2(k)V2(k)-I2(k-1)V2 (k-1), Δ P2(k) the increment input power of the two-dimensional transform device of current state, Δ R are indicatedSref2(k)=sign (Δ P2 (k))·sign(ΔRSref2(k-1))·ΔRS, Δ RSref2(k) incremental resistance of current state, R are indicatedSref2(k) it indicates to work as The second level reference resistance of preceding state, Δ RSIndicate resistance variations step-length.
A kind of operation control system of vehicle-mounted photovoltaic system solar converter, including microprocessor module, photovoltaic cell Module, one-stage transfor-mation device module and two-dimensional transform device module, photovoltaic battery module, one-stage transfor-mation device module and two-dimensional transform device mould Block is successively linked in sequence；
The microprocessor module is used for when system is not up to maximum power output state, by each area's photovoltaic cell group Input voltage of the output voltage as one-stage transfor-mation device is referred to by the reversed disturbance conductance control algolithm first order calculation of variable step Voltage value, and level-one reference voltage value is controlled to the switching frequency for changing one-stage transfor-mation device by PWM wave, to update level-one change The input voltage of parallel operation module；
The microprocessor module is also used to when system not up to stablizes output state, by current state one-stage transfor-mation device Input voltage of the output voltage as two-dimensional transform device calculates second level reference resistance by resistance control algolithm, and by second level Reference resistance switchs to PWM wave after being first converted into second level reference voltage value, by controlling the switching frequency of two-dimensional transform device, thus Update the input voltage of two-dimensional transform device module；Photovoltaic battery module is for converting light energy into electric energy and inputing to one-stage transfor-mation Device module；
The photovoltaic battery module is for converting light energy into electric energy and inputing to one-stage transfor-mation device module, the photovoltaic electric Pond module is illuminated by the light situation subregion on vehicle according to surface of vehicle and is laid with, and the corresponding one-stage transfor-mation of every area's photovoltaic cell Device；
The one-stage transfor-mation device module is used to receive the electric energy of photovoltaic battery module output, and passes through microprocessor module Control changes the electric energy of one-stage transfor-mation device module input, makes system work in maximum power state；
The two-dimensional transform device module is used to receive the electric energy of one-stage transfor-mation device module output, and passes through microprocessor module Control change two-dimensional transform device module input electric energy, make system obtain stablize output after connect load.
Further, the reversed disturbance conductance control algolithm of the variable step, specifically includes:
It is handled using input voltage of the formula I to each area's photovoltaic cell group one-stage transfor-mation device, it is every to obtain current state The level-one reference voltage value V of one area's photovoltaic cell groupref1(k):
Wherein, k indicates current state, and k-1 indicates previous state, and k-2 indicates preceding previous state, Δ V1(k) indicate current The increment reference voltage of the one-stage transfor-mation device of state, V1(k) input voltage of the one-stage transfor-mation device of current state, I are indicated1(k) table Show the input current of the one-stage transfor-mation device of current state, Δ P1(k) the increment input work of the one-stage transfor-mation device of current state is indicated Rate, and Δ P1(k)=I1(k)V1(k)-I1(k-1)V1(k-1), H1(k) coefficient continuously reversely disturbed, H are indicated1(k)=- abs (sign(sign(ΔP1(k))+sign(ΔP1(k-1))), if continuous reversed disturbance, H1(k)=- 1, otherwise H1(k)=0, C (k) adjustment factor of current state, C (k)=(1+H are indicated1(k-2))C-H1(k-2) C (k-2) C, C indicate regulatory factor, G1 (k) current state output conductance and G are indicated1(k)=I1(k)/V1(k), g1(k) the increment electricity of the disturbance sum of current state is indicated It leads and g1(k)=(I1(k)-I1(k-1))/(V1(k)-V1(k-1))；
Wherein, work as RSN'/RSNWhen >=1.5, enables the level-one reference voltage of current state disturb step delta λ (k) and increase, wherein RSNEquivalent series resistance when dispatching from the factory for photovoltaic cell group in the case of STC, RSN' for by the output of the one-stage transfor-mation device of current state Voltage and output electric current calculate the current state equivalent series resistance obtained；Otherwise the level-one reference voltage of current state disturbs step Long Δ λ (k) is constant.
Further, regulatory factor C is calculated by formula III,
Wherein,Indicate the proportionality coefficient of maximum power point voltage and open-circuit voltage, value 0.71-0.78, VOCM expression Maximum open circuit voltage, Δ λ (k) value are that 0.5~2, γ indicates that the acceptable time extends coefficient and γ > 150%.
Further, the resistance control algolithm, specifically includes:
It is handled using input voltage of the formula II to current state two-dimensional transform device, obtains the second level reference of current state Resistance value RSref2(k),
RSref2(k)=RSref2(k-1)+ΔRSref2(k) formula II
Wherein, k indicates current state, and k-1 indicates previous state, and k-2 indicates preceding previous state, R2(k) current shape is indicated State second level variator input resistance value, R2(k)=V2(k)/I2(k), V2(k) input of the two-dimensional transform device of current state is indicated Voltage value, I2(k) input current value of the two-dimensional transform device of current state, Δ P are indicated2(k)=I2(k)V2(k)-I2(k-1)V2 (k-1), Δ P2(k) the increment input power of the two-dimensional transform device of current state, Δ R are indicatedSref2(k)=sign (Δ P2 (k))·sign(ΔRSref2(k-1))·ΔRS, Δ RSref2(k) incremental resistance of current state, R are indicatedSref2(k) it indicates to work as The second level reference resistance of preceding state, Δ RSIndicate resistance variations step-length.The present invention has following technology special compared with prior art Point:
(1) photovoltaic cell is illuminated by the light situation subregion according to automobile, and is separately connected level-one DC-DC converter and is controlled System, solves the deficiency that traditional solar converter is only applicable to the identical photovoltaic cell of one group of illumination condition, so that automobile table Face multiple groups photovoltaic cell can reach maximum power output under respective illumination condition, improve vehicle-mounted photovoltaic system capacity Utilization rate.
(2) it is directed to the continually changing feature of vehicle-mounted photovoltaic system irradiation level, the anti-of variable step is devised to one-stage transfor-mation device To disturbance conductance control algolithm so that the output of one-stage transfor-mation device when illumination width quickly changes, taken into account tracking rapidity and Output voltage stability provides better input condition for two-dimensional transform device, effectively increases the power of system output.
(3) the resistance control algolithm that two-dimensional transform device uses, as system operation becomes closer to MPP, reference voltage increases Amount reduces with the increase of resistance step.It is thereby possible to select biggish step-length obtains higher tracking velocity, while again Steady-state performance is not influenced, so that it controls MPPT better than conductance in terms of tracking velocity.
(4) utilization of two-dimensional transform device has ensured that system can also reach load output in the lesser situation of illumination amplitude and want It asks, and further improves photovoltaic utilization rate.
(5) simultaneously, the grouping control of photovoltaic cell has so that the voltage and current parameter requirement of one-stage transfor-mation device is relatively low Effect has saved cost.
(6) the equivalent series resistance RSN of battery is lied prostrate by calculating the factory time, and determines equivalent resistance RSN ' in real time, letter It is single effectively to judge whether photovoltaic cell occurs aging.And one-stage transfor-mation device voltage can be adjusted according to the degree of aging of battery Step-length is disturbed, the utilization rate of photovoltaic system is increased.
Detailed description of the invention
Fig. 1 is traditional centralized photovoltaic system figure；
Fig. 2 (a) indicates the case where centralized photovoltaic system output characteristics exact matching；
Fig. 2 (b) indicates that centralized photovoltaic system output characteristics indicates unmatched situation；
Fig. 3 (a) is output characteristics figure under 25 DEG C of photovoltaic cell difference irradiation level of constant temperature；
Fig. 3 (b) is the output characteristics of photovoltaic panel under permanent irradiation level 1kW/m2 different temperatures；
Fig. 4 is constant pressure tracing schematic diagram；
Fig. 5 is constant current tracing schematic diagram；
Fig. 6 is duty ratio tracing schematic diagram；
Fig. 7 is constant pressure tracing schematic diagram；
Fig. 8 is perturbation observation method schematic diagram；
The defect schematic diagram of PO method when Fig. 9 is irradiation level variation；
Figure 10 is increment conductance method schematic diagram；
Figure 11 is one-stage transfor-mation device system construction drawing；
Disturbance schematic diagram in tradition conductance control algolithm operating point when Figure 12 is the variation of illumination amplitude；
Figure 13 is the input and output I-V curve figure of one-stage transfor-mation device；
Photovoltaic cell output characteristic curve figure when Figure 14 is RSN variation；
Figure 15 is two-dimensional transform device input characteristics figure；
Figure 16 is two-dimensional transform device system construction drawing；
Figure 17 is resistance control MPPT algorithm steady-state operation schematic diagram；
Figure 18 (a) is family car schematic diagram, and Figure 18 (b) is a group area schematic, and Figure 18 (c) is the signal of b group region Figure, c group area schematic when Figure 18 (d)；
Figure 19 is vehicle-mounted photovoltaic system structure diagram；
Figure 20 is vehicle-mounted photovoltaic system two-dimensional transform device input I-V curve；
Figure 21 is family's photovoltaic system roof figure.
Specific embodiment
A kind of progress control method of vehicle-mounted photovoltaic system solar converter is disclosed in the present embodiment, including as follows Step:
A kind of progress control method of vehicle-mounted photovoltaic system solar converter, includes the following steps:
Step 1: situation being illuminated by the light according to surface of vehicle and carries out subregion, every area is laid with photovoltaic cell group；
Step 2: becoming the output voltage of each area's photovoltaic cell group of current state as the level-one of each area's photovoltaic cell group The input voltage of parallel operation；
Step 3: judge whether the system of current state reaches maximum power output state:
If system is not up to maximum power output state, by the reversed disturbance conductance control algolithm of variable step to current The input voltage of the one-stage transfor-mation device of each area's photovoltaic cell group of state is handled, and each area's photovoltaic cell group of current state is obtained Level-one reference voltage value, the level-one reference voltage value of the area Bing Jiangge photovoltaic cell group is controlled by PWM wave changes one-stage transfor-mation device Switching frequency, update each area's photovoltaic cell group of current state one-stage transfor-mation device input voltage, return step 3, simultaneously will The level-one reference voltage value of each area's photovoltaic cell group of current state is cumulative, obtains current state one-stage transfor-mation device output voltage, holds Row step 4；
If system reaches maximum power output state, step 4 is directly executed；
Step 4: the output voltage for the current state one-stage transfor-mation device that step 3 is obtained is as current state two-dimensional transform device Input voltage；
Step 5: judge whether the system of current state reaches stable output state:
If system not up to stablizes output state, pass through input of the resistance control algolithm to current state two-dimensional transform device Voltage is handled, and obtains the second level reference resistance of current state, and the second level reference resistance of current state is passed through PWM Wave controls the switching frequency of two-dimensional transform device, updates the input voltage of current state two-dimensional transform device, repeats step 5；
If system reaches stable output state, and system reaches maximum power output state, then terminates, otherwise return step 3。
A kind of operation control system of vehicle-mounted photovoltaic system solar converter, including microprocessor module are also disclosed, Photovoltaic battery module, one-stage transfor-mation device module and two-dimensional transform device module, photovoltaic battery module, one-stage transfor-mation device module and second level Converter module is successively linked in sequence；
The microprocessor module is used for when system is not up to maximum power output state, by each area's photovoltaic cell group Input voltage of the output voltage as one-stage transfor-mation device is referred to by the reversed disturbance conductance control algolithm first order calculation of variable step Voltage value, and level-one reference voltage value is controlled to the switching frequency for changing one-stage transfor-mation device by PWM wave, to update level-one change The input voltage of parallel operation module；
The microprocessor module is also used to when system not up to stablizes output state, by current state one-stage transfor-mation device Input voltage of the output voltage as two-dimensional transform device calculates second level reference resistance by resistance control algolithm, and by second level Reference resistance switchs to PWM wave after being first converted into second level reference voltage value, by controlling the switching frequency of two-dimensional transform device, thus Update the input voltage of two-dimensional transform device module；Photovoltaic battery module is for converting light energy into electric energy and inputing to one-stage transfor-mation Device module；
The one-stage transfor-mation device module is used to receive the electric energy of photovoltaic battery module output, and passes through microprocessor module Control changes the electric energy of one-stage transfor-mation device module input, makes system work in maximum power state；
The two-dimensional transform device module is used to receive the electric energy of one-stage transfor-mation device module output, and passes through microprocessor module Control change two-dimensional transform device module input electric energy, make system obtain stablize output after connect load.
The present invention is based on following thinkings: according to the flash-over characteristic of photovoltaic cell, the illumination particularity of vehicle-mounted photovoltaic system and The operability that general-utility car is adapted as solar charging electric car is set out, to car body surface by the photovoltaic cell of different illumination conditions Control is grouped by one-stage transfor-mation device to interfere with each other to reduce, and is realized that one-stage transfor-mation device electrical output power maximizes, is adopted With the improvement control algolithm of suitable automobile light conditions, realize that one-stage transfor-mation device electrical output power is stablized.Become again using second level The control algolithm of parallel operation and its adaptation realizes stable output power and maximization.The characteristics of this new controller be easy for Vehicle-mounted photovoltaic system combines, and effectively increases photovoltaic system active power, electric power output is convenient for regulation.
Specifically, level-one DC-DC converter is connected with corresponding each photovoltaic cell group.One-stage transfor-mation device uses BOOST Circuit can effectively improve the output voltage of photovoltaic cell, improve output power.The system construction drawing of one-stage transfor-mation device such as Figure 11 It is shown.
MPPT maximum power point tracking is done to wherein one group of photovoltaic cell group and its corresponding level-one DC-DC converter.Automobile fortune The characteristics of constantly changing (automobilism direction change, tree shade cloud block) there are each planar illumination condition when row, tradition electricity Lead control algolithm can be generated under the conditions of fast-changing irradiation level mistake reference voltage so that reference voltage to mistake side To disturbance, the output power of photovoltaic cell is reduced.
Now propose a kind of improved conductance control algolithm, in this algorithm, when power continuous equidirectional is changed twice, reference voltage Just reversed disturbance is primary.This disturbance is defined as reversed disturbance, therefore this algorithm is referred to as the reversed disturbance conductance control of variable step Algorithm, by the reversed disturbance conductance control algolithm of variable step to the defeated of the one-stage transfor-mation device of each area's photovoltaic cell group of current state Enter voltage to be handled, obtain the level-one reference voltage value of each area's photovoltaic cell group of current state, specifically include:
It is handled using input voltage of the formula I to each area's photovoltaic cell group one-stage transfor-mation device, it is every to obtain current state The level-one reference voltage value V of one area's photovoltaic cell groupref1(k):
Wherein, k indicates current state, and k-1 indicates previous state, and k-2 indicates preceding previous state, Δ V1(k) indicate current The increment reference voltage of the one-stage transfor-mation device of state, V1(k) input voltage of the one-stage transfor-mation device of current state, I are indicated1(k) table Show the input current of the one-stage transfor-mation device of current state, Δ P1(k) the increment input work of the one-stage transfor-mation device of current state is indicated Rate, and Δ P1(k)=I1(k)V1(k)-I1(k-1)V1(k-1), H1(k) coefficient continuously reversely disturbed, H are indicated1(k)=- abs (sign(sign(ΔP1(k))+sign(ΔP1(k-1))), if continuous reversed disturbance, H1(k)=- 1, otherwise H1(k)=0, C (k) adjustment factor of current state, C (k)=(1+H are indicated1(k-2))C-H1(k-2) C (k-2) C, C indicate regulatory factor, G1 (k) current state output conductance and G are indicated1(k)=I1(k)/V1(k), g1(k) the increment electricity of the disturbance sum of current state is indicated It leads and g1(k)=(I1(k)-I1(k-1))/(V1(k)-V1(k-1))；
Wherein, work as RSN'/RSNWhen >=1.5, enables the level-one reference voltage of current state disturb step delta λ (k) and increase, wherein RSNEquivalent series resistance when dispatching from the factory for photovoltaic cell group in the case of STC, RSN' for by the output of the one-stage transfor-mation device of current state Voltage and output electric current calculate the current state equivalent series resistance obtained；Otherwise the level-one reference voltage of current state disturbs step Long Δ λ (k) is constant.
The influence of photovoltaic cell aging bring is reduced by changing step-length.When photovoltaic cell aging, equivalent series resistance RSN It can obviously increase, the output characteristics of photovoltaic cell can be had an impact.As shown in figure 14, RSNIncrease do not changing open circuit electricity In the case where pressure, maximum power point power is reduced, so that maximum power point voltage deviates to the left, decline becomes on the right side of I-V curve It is slow.When so that system being swung repeatedly near maximum power point, the power Δ P of decline1(k) it reduces.Therefore, RSNWhen significantly increasing Even RSN' and RSNRatio be greater than 1.5 and increase Δ V, it is possible to increase step delta V is so both improved and to be found maximum power point Rapidity, utilization rate are not also reduced.
Specifically, equivalent series resistance R when calculating photovoltaic cell factory in the case of STCSNValue when, need to photovoltaic electric Pond group carries out mathematical modeling.IfWherein, K is Boltzmann constant, and K=1.38058 × 10-23J, q are single Position electron charge, q=1.6 × 10-19C, α are diode coefficient.
Then photovoltaic cell group is by following relational expression:
IO=IPN-ISN{exp[A(VO+IORSN)]-1} (5)
Wherein, IPNFor the photogenerated current of photovoltaic cell group, ISNFor the reverse saturation current of photovoltaic cell group, IOFor photovoltaic electric The output electric current of pond group, VOFor the output voltage of photovoltaic cell group, by formula (5) it is found that the output characteristics of photovoltaic cell group by Tetra- parameters of IPN, ISN, A and RSN determine.But photovoltaic cell manufacturer generally only provides STC (irradiation level 1000W/m2, temperature Degree 25 DEG C) under the conditions of open-circuit voltage VOC, short circuit current ISC, maximum current Im, the parameters such as maximum voltage Vm.
Transcendental equation formula 6 is solved by Newton iteration method, equivalent series when can acquire photovoltaic cell factory in the case of STC Resistance RSNValue.
By the input voltage and input current value (i.e. the output valve of photovoltaic cell) of real-time sampling one-stage transfor-mation device, then pass through formula I algorithm operation determines real-time level-one reference voltage value, and then determines the PWM wave feedback of processor output, realizes to one-stage transfor-mation The maximum power point tracking of device.
The algorithm is with reference to maximum power point voltage VMP in open circuit voltage method from the ratio k of open-circuit voltage VOC in different spokes The principle being basically unchanged under illumination conditions changes voltage twice by power continuous equidirectional and just reversely changes primary method, makes The system of obtaining keeps voltage relatively stable when irradiation level continues change dramatically, and optimizing is further continued for when irradiation level is constant.Quick Under the conditions of varied irradiance level, this innovatory algorithm effectively avoids the reference voltage for generating mistake.Its is metastable defeated Power makes two-dimensional transform device have good input condition out, thus the preferably gross output of lifting system.
Preferably, following analysis is done to reversed disturbance conductance control algolithm, as shown in figure 12, wherein △ P, △ V are respectively Power, voltage variety.
(i) when △ P changes in the same direction twice in succession:
1. change direction is inconsistent twice by △ V, system is in irradiation level situation of change (such as 1 to 2 to 4), so keeping △ V anti- It is primary to variation；
2. change direction is consistent twice by △ V, system is likely to be at normal optimizing stage (such as 3 to 2 to 1), it is also possible to be in The case where irradiation level changes (such as 2 to 1 to 5), so still making △ V inverse change primary.
(ii) △ P twice change direction difference when:
1. change direction is inconsistent twice by △ V, system is in normal optimizing stage (such as 1 to 2 to 1), Ying Jixu；
2. △ V changes unanimously twice, system is in normal optimizing stage (such as 1 to 2 to 1 or 2 to 1 to 6), Ying Jixu.
By above-mentioned analysis, reversed disturbance conductance control algolithm can be defined as follows:
(1) when △ P (k-2), △ P (k-1) change in the same direction twice in succession, Vref(k)=Vref(k-1)-△ V (k), i.e. power When changing in the same direction twice in succession, reference voltage inverse change；
(2) △ P (k-2), △ P (k-1) twice in succession inverse change when, by formula (4) traditional conductance control algolithm disturb Reference voltage.
By the analysis 2. walked to reversed disturbance conductance control algolithm (i), there are the system normal optimizing stages for this algorithm Also can mistake the defect reversely disturbed.In addition, as shown in fig. 7, when illumination amplitude stabilization rise when, maximum power point voltage meeting It deviates to the right.Therefore the reversed disturbance of constant step size can cause to adjust in algorithm normal optimizing stage and illumination amplitude stabilization changes phase The growth for saving the time, reduces the output power of photovoltaic cell.
To improve the rapidity of the normal optimizing of algorithm and the output power of illumination amplitude stabilization changes phase, now introduce reversed Step-length regulatory factor C is disturbed, regulatory factor C is calculated by formula III,
Wherein,Indicate the proportionality coefficient of maximum power point voltage and open-circuit voltage, value 0.71-0.78, VOCM table Show that maximum open circuit voltage, Δ λ (k) value are that 0.5~2, γ indicates that the acceptable time extends coefficient and γ > 150%.
Specifically, the DC-DC converter of each group is connected, I-V curve is as shown in figure 15.According to battery charge parameter Suitable two-dimensional transform device is selected to connect with concatenated DC-DC converter group.
The system construction drawing of two-dimensional transform device connection is as shown in figure 16.Two-dimensional transform device is using BUCK-BOOST electricity in figure Road.According to the difference of battery charge parameter, BUCK circuit or BOOST circuit can be selected.
The necessity of second level DC-DC converter is discussed below.If A, tri- groups of photovoltaic cells of B, C are because being blocked, MPP's Maximum output total voltage is 380V.And load requirement voltage is 400V at this time.Because the intensity of illumination that vehicle is subject to constantly changes, To stably reach load voltage requirement, it is necessary to install second level DC-DC converter.
It should be noted that various parts can all consume certain power.As shown in figure 15, to work in system really Maximum power point should make voltage as big as possible, i.e., real MPP point is C point.Because of each group illumination condition mistake mobile in vehicle Be in journey it is continually changing, the output voltage of photovoltaic cell group may be down to load requirement voltage or less (such as a certain group of photovoltaic electric Pond backlight, then zero) output voltage may be reduced to.Level-one DC-DC converter ensure that each photovoltaic cell group of system can independent work Make in maximum power point, two-dimensional transform device ensure that the stably and controllable of system output voltage.Meanwhile the grouping control of photovoltaic cell So that the voltage and current parameter requirement of one-stage transfor-mation device is relatively low, it is effectively saved cost.
It is described to be handled by input voltage of the resistance control algolithm to current state two-dimensional transform device, obtain current shape The second level reference resistance of state, specifically includes:
It is handled using input voltage of the formula II to current state two-dimensional transform device, obtains the second level reference of current state Resistance value RSref2(k),
RSref2(k)=RSref2(k-1)+ΔRSref2(k) formula II
Wherein, k indicates current state, and k-1 indicates previous state, and k-2 indicates preceding previous state, R2(k) current shape is indicated State second level variator input resistance value, R2(k)=V2(k)/I2(k), V2(k) input of the two-dimensional transform device of current state is indicated Voltage value, I2(k) input current value of the two-dimensional transform device of current state, Δ P are indicated2(k)=I2(k)V2(k)-I2(k-1)V2 (k-1), Δ P2(k) the increment input power of the two-dimensional transform device of current state, Δ R are indicatedSref2(k)=sign (Δ P2 (k))·sign(ΔRSref2(k-1))·ΔRS, Δ RSref2(k) incremental resistance of current state, R are indicatedSref2(k) it indicates to work as The second level reference resistance of preceding state, Δ RSIndicate resistance variations step-length.
By second level reference resistance RSref2(k) and current state two-dimensional transform device output electric current is converted into second level reference voltage Value is controlled by the PWM wave of second level reference voltage so that system operating point stable oscillation near maximum power point.
Preferably, resistance variations step delta R is set by the following method:
(1) acceptable decline power is calculated, is prepared for the step size settings of two-dimensional transform device.Enable KuRepresent photovoltaic system Utilization rate, to KuIt is defined as follows:
Wherein PaveFor actual average power, PmFor MPP maximum power.Generally acceptable utilization rate is 98%, to guarantee Utilization rate can reach 98%, need to optimize to the step-length of control algolithm.As shown in figure 17, because of MPPT sampling period TmpptWith Step delta Rs is constant.In the worst case, i.e. when C point is exactly the intermediary operation point of MPP, decline power is Δ P.In C and G point Output power value when operation is all similar to Pm.However in E point, output power is Pm- Δ P.Then mean power can calculate Are as follows:
Then Δ P can be calculated according to the following formula:
Δ P=0.06 × Pm (9)
(2) resistance variations step delta R is calculated, because C and E are all located at voltage limit region, following equation is set up:
In formula (10), REAnd RCIt can further describe are as follows:
RE=RC+ΔRS (11)
Wherein Vlmt is that system limits voltage.Joint type (10), (11), (12) can obtain:
Solution formula (13) can obtain:
By above formula algorithm, R (k) is set to follow reference resistance R using feedback loopSrefVariation.Power P (k) after definition disturbance =I (k) V (k), power P (k-1)=I (k-1) V (k-1) before disturbing.If P (k) is greater than P (k-1), △ RSrefIt is constant, reference Resistance RSrefContinue to former direction transformation, otherwise △ RSrefTake opposite number, RSrefTo changing inversely.Real work point resistance with With RSrefVariation.The algorithm real-time sampling input voltage and input current value, right back-pushed-type (14) algorithm operation obtain reference resistance, into And determine the PWM wave feedback of two-dimensional transform device input voltage reference value and processor output.By constantly changing reference resistance, So that system operating point is swung near maximum power point.
As shown in figure 15, using resistance control algolithm, system disturbed when voltage is higher it is smaller, to reduce decline function Rate △ P, while improving the robustness of system.As it can be seen that the higher two-dimensional transform device of input voltage, resistance control algolithm and biography System control algolithm, which is compared, effectively increases active power and robustness.
It is laid with specifically, photovoltaic battery module is illuminated by the light situation subregion on vehicle according to surface of vehicle, and every area's photovoltaic Battery corresponds to an one-stage transfor-mation device.It is different according to situation according to photoreceiving surface for single vehicle, there will be identical light conditions The group areas of (usually same plane), typical home car surface are commonly divided into roof, left side car body, right side car body three Part.Bus can be divided into roof, left side car body, right side car body, headstock, five part of the tailstock.It can also be according to the specific feelings of vehicle The approximate region of illumination condition (such as family car car body and bonnet) is divided into same group by condition, to reduce a group number, saves member Device cost.Meanwhile the reversed disturbance conductance control algolithm of the variable step to each group that independently carries out carry out maximum power point with Track.DC-DC converter realizes not interfereing with each other between three groups of photovoltaic cells, and since DC-DC converter is ceaselessly to light Volt battery is MPPT, and as shown in figure 13, left side is input curve, and right side is curve of output, works in each group photovoltaic cell most It is high-power, so that the output of each Intelligent Transformation device is similar to the output of a constant power source.It can be seen that the application of DC-DC converter Not only eliminating influencing each other between photovoltaic cell leads to the rough sledding of mismatch, to effectively increase the output work of system Rate, and the range of MPP is extended, so that system output parameter range is wider, it can preferably adapt to load requirement.
Embodiment one
1, as shown in figure 18 for family car, it is different according to situation according to photoreceiving surface, by the area of mountable photovoltaic cell Domain is divided into 3 groups.Wherein, a group area is maximum, it is assumed that in the case of STC, the photovoltaic cell open-circuit voltage of installation is 109V, short circuit electricity Stream is 6.1A.B, c group area is identical, it is assumed that photovoltaic cell the open-circuit voltage such as 70V, short circuit current 5.08A of installation.
2, according to formula (10), using Newton iteration method, a in the case of STC when calculating photovoltaic cell factory after iteration four times The equal series resistance RSNB, C=of equal series resistance RSNA=0.427 Ω, b, c the group photovoltaic cell of group photovoltaic cell 0.279Ω。
3, setting acceptable time, to extend coefficient gamma be 170%, and reference voltage steps Δ λ (k) is 2V, and proportionality coefficient k takes 0.75, then the value of the regulatory factor Ca of a group algorithm are as follows:
B, the value of regulatory factor Cb, c of c group algorithm are as follows:
4, one-stage transfor-mation device is using BOOST circuit shown in Figure 11, respectively at tri- groups of photovoltaic cell connections of a, b, c.System knot Structure is as shown in figure 19.Using step 2,3 algorithm and upper step in the value of regulatory factor C that acquires, utilize the reversed of variable step Disturbance conductance control methods carry out maximum power point tracking to tri- groups of photovoltaic cells of a, b, c respectively.
5, after the steady-state operation of one-stage transfor-mation device, equal series resistance RSNA '=0.431 of a group photovoltaic cell at this time is calculated Equal series resistance RSNB, C '=0.308 Ω of Ω, b, c group photovoltaic cell.It can be seen that photovoltaic cell degradation degree is smaller, it is not necessarily to Change coefficient.
6, as shown in figure 19, the one-stage transfor-mation device of each group is connected, then is connected with two-dimensional transform device, two-dimensional transform device and vehicle Iron lithium phosphate battery is carried to be connected.Two-dimensional transform device maximum input voltage should be greater than the sum of three groups of photovoltaic cell open-circuit voltages, i.e., 249V, maximum input current should be greater than power maximum photovoltaic cell group short circuit current, i.e. a group short circuit current 6.1A.
7, vehicle-mounted photovoltaic system two-dimensional transform device input I-V curve is as shown in figure 20.According to the tri- groups of photovoltaic cell faces a, b, c Product, can estimate Pm is that 1kW can obtain to make efficiency up to 98% according to formula (13):
Δ P=0.06 × Pm=60W
8, system limitation voltage Vlmt is 249V in this example, can be obtained by formula (14):
9, the input voltage and input current value of real-time sampling two-dimensional transform device, and then using step 4,5 resistance control algolithm, lead to It crosses and constantly changes reference resistance Rref to change the value of real work point resistance R, so that system steady operation is in maximum functional point Near.To complete the grouping two-step evolution to vehicle-mounted photovoltaic system.
Embodiment two
1, different according to situation according to photoreceiving surface for city bus, by the left of the roof of mountable photovoltaic cell, vehicle, It is totally 5 groups of a, b, c, d, e that vehicle right side, headstock, the tailstock 5, which divide,.In STC, a group area is maximum, it is assumed that the photovoltaic electric of installation Pond open-circuit voltage is 200V, short circuit current 6A.B, c group area is identical, it is assumed that the photovoltaic cell open-circuit voltage such as 100V of installation, Short circuit current is 5A.D group open-circuit voltage is 40V, short circuit current 4A.E group open-circuit voltage is 30V, short circuit current 4A.
2 are the same as example 1.
3, setting acceptable time, to extend coefficient gamma be 190%, and level-one reference voltage steps Δ λ (k) is 5V, proportionality coefficient0.75 is taken, then the value of the regulatory factor Ca of a group algorithm are as follows:
B, the value of regulatory factor Cb, c of c group algorithm are as follows:
D, the value of regulatory factor Cd, e of e group algorithm are as follows:
4th~9 step is the same as example 1.
Embodiment three
For family's photovoltaic system as shown in figure 21, feasible implementation steps are as follows:
1, different according to situation according to photoreceiving surface, roof two sides is divided into two groups.Because roof area is much larger than monolithic photovoltaic Cell area, so forming two groups of photovoltaic cell groups using the cascade mode of multiple groups photovoltaic cell.
2~9 are the same as example 1, and remain to carry out MPPT maximum power point tracking to family's photovoltaic system, realize electric power output Efficiency maximizes.

Claims (8)

1. a kind of progress control method of vehicle-mounted photovoltaic system solar converter, which comprises the steps of:
Step 1: situation being illuminated by the light according to surface of vehicle and carries out subregion, every area is laid with photovoltaic cell group；
Step 2: using the output voltage of each area's photovoltaic cell group of current state as the one-stage transfor-mation device of each area's photovoltaic cell group Input voltage；
Step 3: judge whether the system of current state reaches maximum power output state:
If system is not up to maximum power output state, by the reversed disturbance conductance control algolithm of variable step to current state The input voltage of the one-stage transfor-mation device of each area's photovoltaic cell group is handled, and the level-one of each area's photovoltaic cell group of current state is obtained Reference voltage value, the level-one reference voltage value of the area Bing Jiangge photovoltaic cell group is controlled by PWM wave changes opening for one-stage transfor-mation device Pass frequency, the input voltage of the one-stage transfor-mation device of update each area's photovoltaic cell group of current state, return step 3, while will be current The level-one reference voltage value of each area's photovoltaic cell group of state is cumulative, obtains current state one-stage transfor-mation device output voltage, executes step Rapid 4；
If system reaches maximum power output state, step 4 is directly executed；
Step 4: the output voltage for the current state one-stage transfor-mation device that step 3 is obtained is as the defeated of current state two-dimensional transform device Enter voltage；
Step 5: judge whether the system of current state reaches stable output state:
If system not up to stablizes output state, by resistance control algolithm to the input voltage of current state two-dimensional transform device It is handled, obtains the second level reference resistance of current state, and the second level reference resistance of current state is passed through into PWM wave control The switching frequency of two-dimensional transform device processed updates the input voltage of current state two-dimensional transform device, repeats step 5；
If system reaches stable output state, and system reaches maximum power output state, then terminates, otherwise return step 3.
2. the progress control method of vehicle-mounted photovoltaic system solar converter as described in claim 1, which is characterized in that described Input of the reversed disturbance conductance control algolithm by variable step to the one-stage transfor-mation device of each area's photovoltaic cell group of current state Voltage is handled, and is obtained the level-one reference voltage value of each area's photovoltaic cell group of current state, is specifically included:
It is handled using input voltage of the formula I to each area's photovoltaic cell group one-stage transfor-mation device, obtains each area of current state The level-one reference voltage value V of photovoltaic cell groupref1(k):
Wherein, k indicates current state, and k-1 indicates previous state, and k-2 indicates preceding previous state, Δ V1(k) current state is indicated The increment reference voltage of one-stage transfor-mation device, V1(k) input voltage of the one-stage transfor-mation device of current state, I are indicated1(k) indicate current The input current of the one-stage transfor-mation device of state, Δ P1(k) the increment input power of the one-stage transfor-mation device of current state, and Δ are indicated P1(k)=I1(k)V1(k)-I1(k-1)V1(k-1), H1(k) coefficient continuously reversely disturbed, H are indicated1(k)=- abs (sign (sign(ΔP1(k))+sign(ΔP1(k-1))), if continuous reversed disturbance, H1(k)=- 1, otherwise H1(k)=0, C (k) is indicated The adjustment factor of current state, C (k)=(1+H1(k-2))C-H1(k-2) C (k-2) C, C indicate regulatory factor, G1(k) it indicates to work as Preceding state output conductance and G1(k)=I1(k)/V1(k), g1(k) the increment conductance and g of the disturbance sum of current state are indicated1(k)= (I1(k)-I1(k-1))/(V1(k)-V1(k-1))；
Wherein, work as RSN'/RSNWhen >=1.5, enables the level-one reference voltage of current state disturb step delta λ (k) and increase, wherein RSNFor Equivalent series resistance when photovoltaic cell group is dispatched from the factory in the case of STC, RSN' for by current state one-stage transfor-mation device output voltage and It exports electric current and calculates the current state equivalent series resistance obtained；Otherwise the level-one reference voltage of current state disturbs step delta λ (k) constant.
3. the progress control method of vehicle-mounted photovoltaic system solar converter as claimed in claim 2, which is characterized in that pass through Formula III calculates regulatory factor C,
Wherein,Indicate that the proportionality coefficient of maximum power point voltage and open-circuit voltage, value 0.71-0.78, VOCM indicate maximum Open-circuit voltage, Δ λ (k) value are that 0.5~2, γ indicates that the acceptable time extends coefficient and γ > 150%.
4. the progress control method of vehicle-mounted photovoltaic system solar converter as described in claim 1, which is characterized in that described It is handled by input voltage of the resistance control algolithm to current state two-dimensional transform device, obtains the second level reference of current state Resistance value specifically includes:
It is handled using input voltage of the formula II to current state two-dimensional transform device, obtains the second level reference resistance of current state Value RSref2(k),
RSref2(k)=RSref2(k-1)+ΔRSref2(k) formula II
Wherein, k indicates current state, and k-1 indicates previous state, and k-2 indicates preceding previous state, R2(k) current state second level is indicated Variator input resistance value, R2(k)=V2(k)/I2(k), V2(k) input voltage value of the two-dimensional transform device of current state is indicated, I2(k) input current value of the two-dimensional transform device of current state, Δ P are indicated2(k)=I2(k)V2(k)-I2(k-1)V2(k-1), Δ P2(k) the increment input power of the two-dimensional transform device of current state, Δ R are indicatedSref2(k)=sign (Δ P2(k))·sign(Δ RSref2(k-1))·ΔRS, Δ RSref2(k) incremental resistance of current state, R are indicatedSref2(k) the second level ginseng of current state is indicated Examine resistance, Δ RSIndicate resistance variations step-length.
5. a kind of operation control system of vehicle-mounted photovoltaic system solar converter, which is characterized in that including microprocessor module, Photovoltaic battery module, one-stage transfor-mation device module and two-dimensional transform device module, photovoltaic battery module, one-stage transfor-mation device module and second level Converter module is successively linked in sequence；
The microprocessor module is used for when system is not up to maximum power output state, by the output of each area's photovoltaic cell group Input voltage of the voltage as one-stage transfor-mation device passes through the reversed disturbance conductance control algolithm first order calculation reference voltage of variable step Value, and level-one reference voltage value is controlled to the switching frequency for changing one-stage transfor-mation device by PWM wave, to update one-stage transfor-mation device The input voltage of module；
The microprocessor module is also used to export current state one-stage transfor-mation device when system not up to stablizes output state Input voltage of the voltage as two-dimensional transform device calculates second level reference resistance by resistance control algolithm, and second level is referred to Resistance value switchs to PWM wave after being first converted into second level reference voltage value, by controlling the switching frequency of two-dimensional transform device, to update The input voltage of two-dimensional transform device module；Photovoltaic battery module is for converting light energy into electric energy and inputing to one-stage transfor-mation device mould Block；
The photovoltaic battery module is for converting light energy into electric energy and inputing to one-stage transfor-mation device module, the photovoltaic cell mould Root tuber is illuminated by the light situation subregion on vehicle according to surface of vehicle and is laid with, and the corresponding one-stage transfor-mation device of every area's photovoltaic cell；
The one-stage transfor-mation device module is used to receive the electric energy of photovoltaic battery module output, and the control for passing through microprocessor module The electric energy for changing the input of one-stage transfor-mation device module makes system work in maximum power state；
The two-dimensional transform device module is used to receive the electric energy of one-stage transfor-mation device module output, and the control for passing through microprocessor module System changes the electric energy of two-dimensional transform device module input, connects load after so that system is obtained stable output.
6. the operation control system of vehicle-mounted photovoltaic system solar converter as claimed in claim 5, which is characterized in that described The reversed disturbance conductance control algolithm of variable step, specifically includes:
It is handled using input voltage of the formula I to each area's photovoltaic cell group one-stage transfor-mation device, obtains each area of current state The level-one reference voltage value V of photovoltaic cell groupref1(k):
Wherein, k indicates current state, and k-1 indicates previous state, and k-2 indicates preceding previous state, Δ V1(k) current state is indicated The increment reference voltage of one-stage transfor-mation device, V1(k) input voltage of the one-stage transfor-mation device of current state, I are indicated1(k) indicate current The input current of the one-stage transfor-mation device of state, Δ P1(k) the increment input power of the one-stage transfor-mation device of current state, and Δ are indicated P1(k)=I1(k)V1(k)-I1(k-1)V1(k-1), H1(k) coefficient continuously reversely disturbed, H are indicated1(k)=- abs (sign (sign(ΔP1(k))+sign(ΔP1(k-1))), if continuous reversed disturbance, H1(k)=- 1, otherwise H1(k)=0, C (k) is indicated The adjustment factor of current state, C (k)=(1+H1(k-2))C-H1(k-2) C (k-2) C, C indicate regulatory factor, G1(k) it indicates to work as Preceding state output conductance and G1(k)=I1(k)/V1(k), g1(k) the increment conductance and g of the disturbance sum of current state are indicated1(k)= (I1(k)-I1(k-1))/(V1(k)-V1(k-1))；
Wherein, work as RSN'/RSNWhen >=1.5, enables the level-one reference voltage of current state disturb step delta λ (k) and increase, wherein RSNFor Equivalent series resistance when photovoltaic cell group is dispatched from the factory in the case of STC, RSN' for by current state one-stage transfor-mation device output voltage and It exports electric current and calculates the current state equivalent series resistance obtained；Otherwise the level-one reference voltage of current state disturbs step delta λ (k) constant.
7. the operation control system of vehicle-mounted photovoltaic system solar converter as claimed in claim 5, which is characterized in that pass through Formula III calculates regulatory factor C,
Wherein,Indicate that the proportionality coefficient of maximum power point voltage and open-circuit voltage, value 0.71-0.78, VOCM indicate maximum Open-circuit voltage, Δ λ (k) value are that 0.5~2, γ indicates that the acceptable time extends coefficient and γ > 150%.
8. the operation control system of vehicle-mounted photovoltaic system solar converter as claimed in claim 5, which is characterized in that described Resistance control algolithm, specifically includes:
It is handled using input voltage of the formula II to current state two-dimensional transform device, obtains the second level reference resistance of current state Value RSref2(k),
RSref2(k)=RSref2(k-1)+ΔRSref2(k) formula II
Wherein, k indicates current state, and k-1 indicates previous state, and k-2 indicates preceding previous state, R2(k) current state second level is indicated Variator input resistance value, R2(k)=V2(k)/I2(k), V2(k) input voltage value of the two-dimensional transform device of current state is indicated, I2(k) input current value of the two-dimensional transform device of current state, Δ P are indicated2(k)=I2(k)V2(k)-I2(k-1)V2(k-1), Δ P2(k) the increment input power of the two-dimensional transform device of current state, Δ R are indicatedSref2(k)=sign (Δ P2(k))·sign(Δ RSref2(k-1))·ΔRS, Δ RSref2(k) incremental resistance of current state, R are indicatedSref2(k) the second level ginseng of current state is indicated Examine resistance, Δ RSIndicate resistance variations step-length.
CN201910388041.5A 2019-05-10 2019-05-10 Operation control method and system for solar energy converter of vehicle-mounted photovoltaic system Active CN110112818B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910388041.5A CN110112818B (en) 2019-05-10 2019-05-10 Operation control method and system for solar energy converter of vehicle-mounted photovoltaic system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910388041.5A CN110112818B (en) 2019-05-10 2019-05-10 Operation control method and system for solar energy converter of vehicle-mounted photovoltaic system

Publications (2)

Publication Number Publication Date
CN110112818A true CN110112818A (en) 2019-08-09
CN110112818B CN110112818B (en) 2022-03-25

Family

ID=67489249

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910388041.5A Active CN110112818B (en) 2019-05-10 2019-05-10 Operation control method and system for solar energy converter of vehicle-mounted photovoltaic system

Country Status (1)

Country Link
CN (1) CN110112818B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113867471A (en) * 2021-11-01 2021-12-31 国网山东省电力公司威海供电公司 Parameter selection method and system for power controller of photovoltaic system
CN114912066A (en) * 2022-07-19 2022-08-16 南京知研科技有限公司 Data processing method suitable for organic solar cell
CN116093980A (en) * 2023-04-10 2023-05-09 西南交通大学 Zero oscillation power generation system steady state method, device, equipment and medium
CN116627204A (en) * 2023-04-12 2023-08-22 团车互联网信息服务(北京)有限公司 Multimodal MPPT tracking control method and system for solar automobile

Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102290840A (en) * 2011-08-15 2011-12-21 北京航空航天大学 Efficient photovoltaic charge control method for independent photovoltaic generating system
CN202231648U (en) * 2011-10-11 2012-05-23 上海理工大学 Maximum power tracking device of photovoltaic cell
CN102566646A (en) * 2012-01-13 2012-07-11 冶金自动化研究设计院 Maximum power point tracking method under partial shade condition of photovoltaic system
CN102629770A (en) * 2011-02-04 2012-08-08 美商源捷有限公司 Battery charging station
CN102751754A (en) * 2012-06-28 2012-10-24 北京航空航天大学 Solar energy and CT (current) mixing type energy storage and power supply device based on power control
CN102880224A (en) * 2012-10-26 2013-01-16 天津理工大学 Double-mode maximum power point tracking (MPPT) method based on improved step length
CN102929325A (en) * 2012-11-28 2013-02-13 河海大学 Method for tracking maximum power of high-accuracy single-stage photovoltaic power generation system
CN104022734A (en) * 2014-06-24 2014-09-03 西华大学 Photovoltaic power generation control method, processor and system
CN104298295A (en) * 2014-09-19 2015-01-21 华南理工大学 Photovoltaic power generation system maximum power tracking control method based on multiple step lengths
CN104571256A (en) * 2015-01-19 2015-04-29 国家电网公司 Photovoltaic power extreme value searching system and method considering illumination change
CN104765400A (en) * 2015-02-05 2015-07-08 武汉大学 Photovoltaic power generation system environment self-adaptive type MPPT (maximum power point tracking) method and system
CN105573400A (en) * 2015-12-29 2016-05-11 华南理工大学 Tracking control method for maximum power of photovoltaic power generation system
CN105676940A (en) * 2016-01-25 2016-06-15 青岛理工大学 Maximum power point tracking control method of solar cell module
CN106681423A (en) * 2016-10-17 2017-05-17 国网重庆市电力公司电力科学研究院 Maximum power point tracing method and device of photovoltaic cell
JP2017127175A (en) * 2016-01-15 2017-07-20 株式会社ネクステック Start determination circuit and start determination method
CN107037853A (en) * 2017-06-21 2017-08-11 湖南工业大学 A kind of MPPT control method for photovoltaic cell
CN108539783A (en) * 2018-04-04 2018-09-14 云南电网有限责任公司电力科学研究院 Photovoltaic plant DC boosting collects access system and its control guard method
CN109508062A (en) * 2019-01-28 2019-03-22 吉林建筑大学 A kind of photovoltaic power generation control method and system based on fuzzy conductance
CN109638861A (en) * 2018-12-25 2019-04-16 国网陕西省电力公司电力科学研究院 A kind of supercritical unit participates in the control method and control system model of primary frequency modulation

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102629770A (en) * 2011-02-04 2012-08-08 美商源捷有限公司 Battery charging station
CN102290840A (en) * 2011-08-15 2011-12-21 北京航空航天大学 Efficient photovoltaic charge control method for independent photovoltaic generating system
CN202231648U (en) * 2011-10-11 2012-05-23 上海理工大学 Maximum power tracking device of photovoltaic cell
CN102566646A (en) * 2012-01-13 2012-07-11 冶金自动化研究设计院 Maximum power point tracking method under partial shade condition of photovoltaic system
CN102751754A (en) * 2012-06-28 2012-10-24 北京航空航天大学 Solar energy and CT (current) mixing type energy storage and power supply device based on power control
CN102880224A (en) * 2012-10-26 2013-01-16 天津理工大学 Double-mode maximum power point tracking (MPPT) method based on improved step length
CN102929325A (en) * 2012-11-28 2013-02-13 河海大学 Method for tracking maximum power of high-accuracy single-stage photovoltaic power generation system
CN104022734A (en) * 2014-06-24 2014-09-03 西华大学 Photovoltaic power generation control method, processor and system
CN104298295A (en) * 2014-09-19 2015-01-21 华南理工大学 Photovoltaic power generation system maximum power tracking control method based on multiple step lengths
CN104571256A (en) * 2015-01-19 2015-04-29 国家电网公司 Photovoltaic power extreme value searching system and method considering illumination change
CN104765400A (en) * 2015-02-05 2015-07-08 武汉大学 Photovoltaic power generation system environment self-adaptive type MPPT (maximum power point tracking) method and system
CN105573400A (en) * 2015-12-29 2016-05-11 华南理工大学 Tracking control method for maximum power of photovoltaic power generation system
JP2017127175A (en) * 2016-01-15 2017-07-20 株式会社ネクステック Start determination circuit and start determination method
CN105676940A (en) * 2016-01-25 2016-06-15 青岛理工大学 Maximum power point tracking control method of solar cell module
CN106681423A (en) * 2016-10-17 2017-05-17 国网重庆市电力公司电力科学研究院 Maximum power point tracing method and device of photovoltaic cell
CN107037853A (en) * 2017-06-21 2017-08-11 湖南工业大学 A kind of MPPT control method for photovoltaic cell
CN108539783A (en) * 2018-04-04 2018-09-14 云南电网有限责任公司电力科学研究院 Photovoltaic plant DC boosting collects access system and its control guard method
CN109638861A (en) * 2018-12-25 2019-04-16 国网陕西省电力公司电力科学研究院 A kind of supercritical unit participates in the control method and control system model of primary frequency modulation
CN109508062A (en) * 2019-01-28 2019-03-22 吉林建筑大学 A kind of photovoltaic power generation control method and system based on fuzzy conductance

Non-Patent Citations (7)

* Cited by examiner, † Cited by third party
Title
MOSTAFA BAKKAR，等: "Module Integrated Converter for Photovoltaic Applications with Different Control Strategies", 《ICCTA 2013》 *
XU CHEN，等: "Improved Power Control of Photovoltaic Generation System under Unbalanced Grid Voltage Conditions", 《2013 IEEE PES ASIA-PACIFIC POWER AND ENERGY ENGINEERING CONFERENCE (APPEEC)》 *
朱啸行，等: "考虑多点局部阴影的光伏阵列建模及复合型最大功率跟踪算法研究", 《电网与清洁能源》 *
李晶，等: "光伏发电系统中最大功率点跟踪算法的研究", 《太阳能学报》 *
杨博，等: "部分遮蔽下改进樽海鞘群算法的光伏系统最大功率跟踪", 《控制理论与应用》 *
熊宇，等: "光伏并网电流源逆变器扰动电阻最大功率跟踪策略", 《电网技术》 *
艾雪雯，等: "基于新型变步长爬山搜索法的光伏MPPT系统设计", 《工业仪表与自动化装置》 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113867471A (en) * 2021-11-01 2021-12-31 国网山东省电力公司威海供电公司 Parameter selection method and system for power controller of photovoltaic system
CN113867471B (en) * 2021-11-01 2022-09-16 国网山东省电力公司威海供电公司 Parameter selection method and system for power controller of photovoltaic system
CN114912066A (en) * 2022-07-19 2022-08-16 南京知研科技有限公司 Data processing method suitable for organic solar cell
CN114912066B (en) * 2022-07-19 2022-09-27 南京知研科技有限公司 Data processing method suitable for organic solar cell
CN116093980A (en) * 2023-04-10 2023-05-09 西南交通大学 Zero oscillation power generation system steady state method, device, equipment and medium
CN116093980B (en) * 2023-04-10 2023-06-16 西南交通大学 Zero oscillation power generation system steady state method, device, equipment and medium
CN116627204A (en) * 2023-04-12 2023-08-22 团车互联网信息服务(北京)有限公司 Multimodal MPPT tracking control method and system for solar automobile
CN116627204B (en) * 2023-04-12 2023-10-20 团车互联网信息服务(北京)有限公司 Multimodal MPPT tracking control method and system for solar automobile

Also Published As

Publication number Publication date
CN110112818B (en) 2022-03-25

Similar Documents

Publication Publication Date Title
CN110112818A (en) A kind of progress control method and system of vehicle-mounted photovoltaic system solar converter
CN106444957B (en) A kind of maximum photovoltaic power point tracking based on adaptive three step-length
KR100892220B1 (en) Maximum Power Point Tracking of Photovoltaic System using Approximation Method
Zakzouk et al. Modified variable-step incremental conductance maximum power point tracking technique for photovoltaic systems
CN107992153A (en) A kind of photovoltaic maximum power point-tracing control method
CN104765400A (en) Photovoltaic power generation system environment self-adaptive type MPPT (maximum power point tracking) method and system
Ahmed et al. PSO-SMC controller based GMPPT technique for photovoltaic panel under partial shading effect
Bharath A novel sensorless hybrid MPPT method based on FOCV measurement and P&O MPPT technique for solar PV applications
Arulmurugan Photovoltaic powered transformer less hybrid converter with active filter for harmonic and reactive power compensation
Radjai et al. The new FLC-variable incremental conductance MPPT with direct control method using Cuk converter
CN105652951B (en) A kind of variable step MPPT control method
CN109871061B (en) Maximum power tracking control strategy for photovoltaic power generation system
CN108107967A (en) A kind of maximum power of photovoltaic cell point tracking method
CN104850166A (en) Photovoltaic power generation maximum power tracking method adopting sliding mode layer extremum searching control
CN106647284B (en) High-power photovoltaic array simulator control method based on fuzzy PI hybrid control
Guo et al. Real-time and grid-connected control of PV power system
CN107544610A (en) A kind of photovoltaic MPPT control method based on MPP voltage regulations and gradient search
Morales et al. A novel global maximum power point tracking method based on measurement cells
Necaibia et al. Practical implementation of a proposed MPPT control strategy to mitigate inaccurate responses for photovoltaic systems
CN114498644A (en) Novel self-adaptive instruction filtering back-pushing sliding mode controller of energy storage photovoltaic grid-connected system
Zhao et al. Study on Variable Step Sliding-Mode Based MPPT for PV Array
CN110445177B (en) Photovoltaic inverter system control method based on switching observer control
Gaikwad et al. A novel algorithm for mppt for pv application system by use of direct control method
CN103631309B (en) The MPPT control method of single-stage photovoltaic inverter
CN110829490B (en) Equal-power control method of photovoltaic power generation system based on optimized Fibonacci sequence

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant