CN114911300A - Photovoltaic system multi-pole tracking control method and device based on boundary positioning conductance increment control - Google Patents

Abstract

The invention discloses a photovoltaic system multi-pole tracking control method and device based on boundary positioning conductance increment control, which comprises the following steps: s1, collecting operation data of each photovoltaic cell array; s2, establishing a photovoltaic cell irradiance non-measured calculation model; s3, calculating the irradiance received by each photovoltaic cell, and constructing a positive irradiance vector and an irradiance subscript vector; s4, constructing a photovoltaic array multi-pole maximum value interval positioning model and a maximum power point current analysis model through photovoltaic array dynamic characteristic analysis, calculating a maximum power point reference operation current, and performing multi-pole tracking control based on a conductance incremental method. According to the method, the maximum power point interval can be obtained only by measuring the operating voltage and current of each photovoltaic cell panel, so that energy loss is avoided; and the device calculates the current irradiance as I according to the real-time collected running voltage and current _pma And the data source of x calculation avoids the application of an irradiance sensor.

Description

A method and device for multi-pole tracking control of photovoltaic system based on boundary positioning conductance incremental control

technical field

The invention belongs to the technical field of photovoltaic new energy development and application, and in particular relates to a photovoltaic system multi-pole tracking control method and device based on boundary positioning conductance incremental control.

Background technique

In the context of the goal of "carbon peaking and carbon neutrality", the state has implemented a county-wide rooftop distributed photovoltaic propulsion project. In practical operation of photovoltaic systems, solar cells are often adversely affected by shadows from clouds, trees, chimneys, equipment or other structures. At this time, under the condition of partial shadow and uneven illumination, the overall output power capacity of the photovoltaic system is seriously reduced, and each solar cell in the photovoltaic system cannot reach the maximum power point at the same time. As long as 10% of the array area is blocked, the total output power of the photovoltaic system Power generation would drop by 50%. Therefore, the multi-pole tracking control of the solar cell series circuit under the condition of uneven irradiance is beneficial to realize the efficient energy conversion of the solar cell series circuit under the condition of uneven illumination.

At present, the multi-pole tracking control of photovoltaic systems mostly adopts the particle swarm algorithm. This method takes the sudden change of power as the restart condition. The sudden change of power is not a sufficient condition of the shading condition, which expands the restart range; the initialization condition after the particle swarm algorithm is restarted Most of the photovoltaic arrays are operated in an open-circuit state or a short-circuit state to obtain the required information. In the case of severe environmental changes, the frequent restart of the particle swarm algorithm program causes a large amount of energy waste in the photovoltaic system. Therefore, researching a new type of multi-pole tracking control method for photovoltaic systems is an urgent problem to be solved.

SUMMARY OF THE INVENTION

In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide a multi-pole tracking control method and device for a photovoltaic system based on boundary positioning conductance incremental control. This method can determine the interval boundary of the global maximum power point of the photovoltaic system in real time, avoid the multi-pole maximum power point tracking control of the photovoltaic system in the open and short-circuit operation states, and is conducive to the realization of efficient energy conversion of the photovoltaic system.

In order to achieve the above object, the present invention adopts the following technical solutions:

A multi-pole tracking control method for photovoltaic systems based on boundary positioning conductance incremental control, comprising the following steps:

Step S1, collecting the operation data and environmental data of each photovoltaic cell array at any time through the data collection module;

Step S2, establishing a photovoltaic cell irradiance non-measurement calculation model;

Step S3: Calculate the operating data of the photovoltaic cell array in the step S1 by using the photovoltaic cell irradiance non-measurement calculation model described in the step S2, and obtain the irradiance received by each photovoltaic cell. The irradiance is arranged and calculated according to the forward order from low to high, and the forward irradiance vector and the irradiance index vector are constructed;

Step S4, through the analysis of the dynamic characteristics of the photovoltaic array, construct a multi-pole maximum value interval positioning model and a maximum power point current analysis model of the photovoltaic array, input the forward irradiance vector into the maximum value interval positioning model for calculation, and obtain the global maximum power interval. Corresponding irradiance; Input the irradiance corresponding to the global maximum power interval into the maximum power point current analytical model to obtain the reference operating current of the maximum power point, and perform multi-pole tracking control based on the conductance increment method.

Further, the operating data in the step S1 includes the operating voltage V and current I of each photovoltaic cell array at any time; the environmental data includes the air temperature data T _air within 10 meters in the lateral vicinity of the photovoltaic cell array.

Further, establishing a photovoltaic cell irradiance non-measurement calculation model in the step S2 includes the following steps:

Step S21, establishing a photovoltaic cell irradiance non-measurement calculation model f(S)=I, and the calculation model is specifically shown in the following formula:

I_sc为太阳能电池板的短路电流、V_oc为 开路电压、I_m为最大功率点电流，V_m为最大功率点电压，I_sc、V_oc、I_m和V_m在标准测试条件下由光伏电池供应商提供；S为光伏电池板接 受的辐照度，e为自然对数，V和I为光伏电池运行电压和电流，T_air为环境温度；in,

I _sc is the short circuit current of the solar panel, V _oc is the open circuit voltage, _{Im is the maximum power point current, V m is} the maximum power point voltage, I _sc , V _oc , I _m and V _m are determined by photovoltaic Provided by the battery supplier; S is the irradiance received by the photovoltaic panel, e is the natural logarithm, V and I are the operating voltage and current of the photovoltaic cell, and T _air is the ambient temperature;

Step S22, according to the current I, the voltage V and the ambient temperature T _air collected in the step S1, construct an irradiance solving equation f(S)-I=0.

Further, the step S3 specifically includes the following steps:

Step S31, using the irradiance to solve the equation f(S)-I=0 and combining the operating voltage _V and current I of each photovoltaic cell to calculate the irradiance Si received by each photovoltaic cell;

Step S32, arranging the irradiance S _i obtained in step 1) from small to large to establish a forward irradiance vector S;

并且统计满足不等式计算的次数q，即是 极点个数。Step S33, each element in the irradiance vector S obtained in step 2) is screened according to the following inequality, and then record the subscript that satisfies the inequality irradiance S _i to form the irradiance subscript vector

And count the number of times q that satisfy the inequality calculation, that is, the number of poles.

Further, the step S4 specifically includes the following steps:

Step S41, through the analysis of the dynamic characteristics of the photovoltaic array, construct a multi-pole maximum interval positioning model of the photovoltaic array as follows:

的元素，p是光伏阵列串联的电 池板个数，

为局部最大功率值大小的分界系数；where i and j are the irradiance index vectors

The element of , p is the number of solar panels connected in series in the photovoltaic array,

is the demarcation factor of the local maximum power value;

In step S42, the inequality in step S33 is repeatedly judged, and the irradiance S that finally meets the condition is marked as "max", then the region where the global maximum power point is located is (S _max-1 , S _max ), which is called PV array multi-pole maximum value interval;

Step S43, constructing an analytical model of the maximum power point current I _pmax , the analytical model is shown in the following formula:

Step S44, input the irradiance corresponding to the global maximum power interval into the maximum power point current analytical model described in step S43, obtain the maximum power point reference operating current, and perform multi-pole tracking control based on the conductance increment method.

Further, a photovoltaic system multi-pole tracking control device based on boundary positioning conductance incremental control, the device is used for the method described in any one of claims 1-5, comprising:

a data acquisition module, used to collect the photovoltaic cell array operation data and environmental data described in step S1;

The photovoltaic cell irradiance non-measurement calculation module is used to establish a photovoltaic cell irradiance calculation function, and calculate the irradiance received by each photovoltaic cell by using the photovoltaic cell operating voltage, current and ambient temperature;

The PV array multi-pole maximum interval positioning module is used to arrange and calculate the irradiance from low to high forward, construct the forward irradiance vector and the irradiance index vector, and combine the forward irradiance vector and the irradiance index vector. The irradiance index vector is input into the maximum value interval positioning model to calculate the irradiance corresponding to the global maximum power interval;

The maximum power point current analytical calculation module is used to construct the maximum power point current I _pmax analytical model in the step S43, and input the irradiance corresponding to the global maximum power interval into the maximum power point current analytical model. Obtain the reference operating current of the maximum power point;

The PWM tracking control module is used to take the reference operating current of the maximum power point as the initial value of the conductance increment method, and embed it into the PWM controller through software programming to perform maximum pole tracking control.

Further, the photovoltaic cell irradiance non-measurement calculation module calculates the irradiance S=f ⁻¹ by using the formula in the step S21 according to the photovoltaic cell operating voltage V, current I and ambient temperature T _air data. (I).

Further, the photovoltaic array multi-pole maximum interval positioning module includes:

The irradiance vector forward arrangement sub-module is used to arrange Si from small to large to establish the _irradiance vector S;

The irradiance subscript vector sub-module is used to screen the irradiance vector S according to the following inequality in sequence;

The photovoltaic array multi-pole maximum value interval positioning sub-module is used for constructing the photovoltaic array multi-pole maximum value interval positioning model in the step S41 by analyzing the dynamic characteristics of the photovoltaic array.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The present invention can quickly determine the interval where the global maximum power peak point is located and its upper and lower boundaries, input the irradiance corresponding to the global maximum power interval into the maximum power point current analytical model, obtain the maximum power point reference operating current, and use it as the conductance The initial value of the incremental method can be quickly tracked to the global maximum power point by using the conductance incremental method in the maximum power interval; the global maximum power interval boundary of the present invention can be updated in real time to ensure that the maximum power point interval changes accordingly, and the operating current only needs to be within In this interval, the conductance increment control principle will automatically find the maximum power point, which has good robustness and adaptability; and the method of the present invention does not need to operate the entire circuit to a short-circuit or open-circuit state when the photovoltaic system is started. It is only necessary to measure the operating voltage and current of each solar panel to obtain the maximum power point range, which can avoid energy loss.

(2) In the present invention, when the operating current I is outside the maximum power point range, the output ΔI (the difference between the actual output current of the system and the reference output current) enables the system to quickly run to the maximum power point range, with good rapidity.

(3) The control device of the present invention calculates the current irradiance as the data source for I _pmax calculation according to the operating voltage and current collected in real time, avoiding the use of an irradiance sensor.

Description of drawings

Fig. 1 is the flow chart of the photovoltaic system multi-pole tracking control method based on boundary positioning conductance increment control of the present invention;

Fig. 2 is the irradiance variation curve diagram of the present invention;

Fig. 3 is the temperature change curve diagram of photovoltaic cell of the present invention;

Fig. 4 is a comparison diagram of the multi-pole tracking performance of the method of the present invention and the global scanning method for a photovoltaic system.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used for explaining the present invention, rather than limiting the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all of the parts related to the present invention.

Example

A multi-pole tracking control method for photovoltaic systems based on boundary positioning conductance incremental control, the flowchart of which is shown in Figure 1, including the following steps:

Step S1: Collect the operation data and environmental data of each photovoltaic cell array at any time through the data acquisition module; the operation data includes the operation voltage V and the current I of each photovoltaic cell array at any time, and the environmental data includes the horizontal direction of the photovoltaic cell array. Air temperature data T _air within 10 meters nearby, as shown in step 2 in Figure 1;

Step S2, first, establish a photovoltaic cell irradiance non-measurement calculation model f(S)=I, as shown in step 3 in FIG. 1, the calculation model is specifically shown in the following formula:

I_sc为太阳能电池板的短路电流、V_oc为 开路电压、I_m为最大功率点电流，V_m为最大功率点电压，I_sc、V_oc、I_m和V_m在标准测试条件下由太阳能电池供应商提供；S为光伏电池板 接受的辐照度，e为自然对数，V和I为光伏电池运行电压和电流，T_air为环境温度；in,

I _sc is the short circuit current of the solar panel, V _oc is the open circuit voltage, _{Im is the maximum power point current, V m is} the maximum power point voltage, I _sc , V _oc , _{Im and V m are} measured by the solar Provided by the battery supplier; S is the irradiance received by the photovoltaic panel, e is the natural logarithm, V and I are the operating voltage and current of the photovoltaic cell, and T _air is the ambient temperature;

In this embodiment, the parameters I _sc , V _oc , Im and V _m of the solar panels are selected to be 25.44A, 66V, 23.25A and _54.2V respectively; the number of photovoltaic panels in series is 3, and the three photovoltaic panels are named as PV1, PV2 and PV3 are connected in series to form a system operation, wherein PV1 changes according to the trend of S1 and T1 in Figure 2 and Figure 3, and PV2 and PV3 changes according to the trend of S2 and T2 in Figure 2 and Figure 3;

Next, according to the current I, the voltage V and the ambient temperature T _air collected in the step S1 , an irradiance solving equation f(S)-I=0 is constructed.

并且统计满足不等式计算的次数q，也就是极点个数；所述辐照度下 标向量

的物理意义是物理意义是该向量中元素对应的电池板的I_m附近存在局部极值；Step S3: First, use the irradiance constructed in the step S2 to solve the equation f(S)-I=0 and combine the operating voltage V and current I of each photovoltaic cell in the step S1 to quickly perform a fast calculation on f(S)=I. Solve to obtain the irradiance S ₁ , S ₂ , S ₃ of the photovoltaic cells PV1, PV2 and PV3; secondly, arrange the obtained S ₁ , S ₂ , S ₃ in ascending order to establish the forward irradiance The illuminance vector S, as shown in step 4 in Figure 1; finally, the elements in the forward irradiance vector S are screened according to the following inequality, as shown in step 4 in Figure 1, the record satisfies the The subscript of the inequality _irradiance Si, which constitutes the subscript vector of the irradiance

And count the times q that satisfy the inequality calculation, that is, the number of poles; the irradiance subscript vector

The physical meaning of is that there is a local extremum near the _Im of the panel corresponding to the element in the vector;

Step S4, first, through the analysis of the dynamic characteristics of the photovoltaic array, build a photovoltaic array multi-pole maximum value interval positioning model, as shown in step 5 in Figure 1, the model is specifically shown in the following formula:

的元素，p是光伏阵列串联的电池板个数，

为局部最大功率值大小的分界系数。where i and j are vectors

The element of , p is the number of solar panels connected in series in the photovoltaic array,

is the demarcation factor of the local maximum power value.

的影响；通常情况下峰值电压V_m约是开 路电压V_oc的0.8倍，则

的典型值如表1所示。In practice, there is no order of magnitude difference between (0.0005S _j -0.5), and the ln(e+0.0005S _j -0.5) pair can be ignored.

Influence; usually the peak voltage V _m is about 0.8 times the open circuit voltage V _oc , then

Typical values are shown in Table 1.

Table 1 Typical values of local maximum power demarcation factor

Next, the inequality in step S3 is repeatedly judged, and the irradiance S that finally meets the condition is marked as "max", then the region where the global maximum power point is located is (S _max-1 , S _max ), which is called photovoltaic Array multi-pole maximum zone (GMPPZ, Global Maximum Power Point Zone), as shown in step 5 in Figure 1;

Then, an analytical model of the maximum power point current I _pmax is constructed, as shown in step 6 in FIG. 1 , and the analytical model is specifically shown in the following formula:

Finally, input the irradiance corresponding to the global maximum power interval into the maximum power point current analytical model to obtain the maximum power point reference operating current, and perform multi-pole tracking control based on the conductance increment method, as shown in the steps in Figure 1 8 shown.

Fig. 4 shows the comparative effect of the method of the present invention and the global scanning method on the multi-pole tracking control effect of the photovoltaic system. As shown in Figure 4, in the 0-0.1s time period, the photovoltaic system quickly runs to the global maximum power point range, and combines with the conductance incremental method to stably run at the maximum point; while the global scanning method runs the power curve to the bottom, This results in increased power loss and a longer time to run to the maximum power point. At 0.3s, the environment changes drastically, the boundary of the multi-pole maximum interval changes, the current operating point is relatively close to the updated multi-pole maximum interval, and after a short transient process, it quickly stabilizes at the new maximum point, at 0.3 At time s, there is almost no fluctuation in transition to the new working condition, while the global scanning method has a fluctuation process. At 0.5s, it quickly transitions to a new equilibrium state with the same transient process, maintaining the global maximum power output.

A device for the above-mentioned multi-pole tracking control method of photovoltaic system based on boundary positioning conductance incremental control, comprising:

A data acquisition module for collecting the photovoltaic cell array operating data and environmental data described in step S1; the photovoltaic cell operating data includes photovoltaic cell operating voltage and current data, and the environmental data includes air temperature data within 10 meters of the lateral vicinity of the photovoltaic cell ;

The photovoltaic cell irradiance non-measurement calculation module is used to establish a photovoltaic cell irradiance calculation function. By using the photovoltaic cell operating voltage, current and ambient temperature, and then according to the photovoltaic cell irradiance non-measurement calculation established in step S2 model, the irradiance S received by each photovoltaic cell is calculated, and the calculation formula of the irradiance S is as follows:

S = f ^-1 (I)

The photovoltaic array multi-pole maximum interval positioning module, which includes the irradiance vector forward arrangement sub-module, the irradiance subscript vector sub-module and the photovoltaic array multi-pole maximum value interval positioning sub-module;

The irradiance vector forward arrangement submodule is used for arranging the irradiance S _i from small to large to establish a forward irradiance vector S;

The irradiance subscript vector submodule is used to perform the following inequality screening on the forward irradiance vector S in order

并 且统计满足不等式计算的次数q，也就是极点个数；Record the subscripts that satisfy the inequality irradiance S _i to form the irradiance subscript vector

And count the number of times q that satisfy the inequality calculation, that is, the number of poles;

The photovoltaic array multi-pole maximum interval positioning submodule: used to construct a photovoltaic array multi-pole maximum interval positioning model by analyzing the dynamic characteristics of the photovoltaic array, and the model is specifically shown in the following formula:

的元素，p是光伏阵列串联的电 池板个数，

为局部最大功率值大小的分界系数；where i and j are the irradiance index vectors

The element of , p is the number of solar panels connected in series in the photovoltaic array,

is the demarcation factor of the local maximum power value;

Repeatedly judging the inequality in step S3, and denoting the irradiance S that finally meets the conditions as "max", then the area where the global maximum power point is located is (S _max-1 , S _max ), which is called the photovoltaic array multi- Pole maximum interval (GMPPZ, GlobalMaximum Power Point Zone);

The maximum power point current analytical calculation module is used to construct the maximum power point current I _pmax analytical model in the step S4, and input the irradiance corresponding to the global maximum power interval into the maximum power point current analytical model to obtain the maximum power point reference running current;

The constructed maximum power point current I _pmax is specifically shown in the following formula:

The PWM tracking control module is used to use the maximum power point current as the reference operating current of the photovoltaic cell, and the reference operating current of the photovoltaic cell as the initial value of the conductance incremental tracking control, and perform multi-pole tracking control based on the conductance incremental method.

The above are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made to those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention. The scope is determined by the scope of the appended claims.

Claims (8)

1. A photovoltaic system multi-pole tracking control method based on boundary positioning conductance increment control is characterized by comprising the following steps:

step S1, collecting the operation data and the environment data of each photovoltaic cell array at any time through a data collection module;

step S2, establishing a photovoltaic cell irradiance non-measured calculation model;

step S3, calculating the photovoltaic cell array operation data in the step S1 through the photovoltaic cell irradiance non-measurement calculation model in the step S2 to obtain irradiance received by each photovoltaic cell, arranging and calculating the irradiance according to a low-to-high positive direction, and constructing a positive irradiance vector and an irradiance subscript vector;

step S4, constructing a photovoltaic array multi-pole maximum interval positioning model and a maximum power point current analysis model through photovoltaic array dynamic characteristic analysis, inputting a forward irradiance vector into the maximum interval positioning model for calculation, and obtaining irradiance corresponding to a global maximum power interval; and inputting irradiance corresponding to the global maximum power interval into a maximum power point current analysis model to obtain a maximum power point reference running current, and performing multi-pole tracking control based on a conductance increment method.

2. The photovoltaic system multi-pole tracking control method based on the boundary positioning conductance increment control of claim 1, wherein the operation data in the step S1 includes an operation voltage V and a current I of each photovoltaic cell array at any time; the environmental data includes air temperature data T within 10 meters of lateral proximity of the photovoltaic cell array _air 。

3. The photovoltaic system multi-pole tracking control method based on the border-positioned conductance increment control as claimed in claim 2, wherein said step S2 of establishing a non-measured calculation model of irradiance of the photovoltaic cell comprises the steps of:

step S21, establishing a non-measured calculation model f (S) -I of irradiance of the photovoltaic cell, where the calculation model is specifically shown as follows:

wherein,

I _sc short-circuit current, V, for solar panels _oc Is an open circuit voltage, I _m Is the maximum power point current, V _m Is the maximum power point voltage, I _sc 、V _oc 、I _m And V _m Provided by the photovoltaic cell supplier under standard test conditions; s is the irradiance received by the photovoltaic cell panel, e is the natural logarithm, V and I are the operating voltage and current of the photovoltaic cell, T _air Is ambient temperature;

step S22, collecting current I, voltage V and environment temperature T according to the step S1 _air And constructing an irradiance solving equation f (S) -I ═ 0.

4. The photovoltaic system multi-pole tracking control method based on the boundary positioning conductance increment control of claim 3, wherein the step S3 specifically comprises the following steps:

step S31, solving equation f (S) -I ═ 0 by using the irradiance, and calculating irradiance S received by each photovoltaic cell by combining operating voltage V and current I of each photovoltaic cell _i ；

Step S32, obtaining irradiance S in step 1) _i Arranging according to the sequence from small to large, and establishing a positive irradiance vector S;

step S33, screening elements in the irradiance vector S obtained in the step 2) according to the following inequality, and then recording irradiance S meeting the inequality _i Forming said irradiance subscript vector

And counting the times q of inequality calculation, namely the number of poles.

5. The photovoltaic system multi-pole tracking control method based on the boundary positioning conductance increment control according to claim 4, wherein the step S4 specifically comprises the following steps:

step S41, through analysis of dynamic characteristics of the photovoltaic array, a positioning model of the maximum and minimum multi-pole interval of the photovoltaic array is constructed as follows:

wherein i and j are vectors

P is the number of solar panels connected in series by the photovoltaic array,

a dividing coefficient is the size of the local maximum power value;

step S42, repeatedly judging the inequality in the step S33, and marking the irradiance S which finally meets the condition as the maximum power point as the maximum power (max), wherein the area where the global maximum power point is located is (S) _max-1 ，S _max ) The maximum value interval of multiple poles of the photovoltaic array is called;

step S43, constructing the maximum power point current I _pmax An analytical model, the analytical model being represented by the following formula:

and step S44, inputting the irradiance corresponding to the global maximum power interval into the maximum power point current analysis model in the step S43 to obtain a maximum power point reference running current, and performing multi-pole tracking control based on a conductance increment method.

6. A photovoltaic system multi-pole tracking control device based on boundary positioning conductance increment control, which is used for the method of any one of claims 1-5, and comprises:

a data acquisition module for collecting the photovoltaic cell array operation data and the environmental data in step S1;

the photovoltaic cell irradiance non-measurement calculation module is used for establishing a photovoltaic cell irradiance calculation function and calculating irradiance received by each photovoltaic cell by utilizing the operating voltage, current and ambient temperature of the photovoltaic cell;

the photovoltaic array multi-pole maximum interval positioning module is used for arranging and calculating irradiance in a forward direction from low to high, constructing a forward irradiance vector and an irradiance subscript vector, and inputting the forward irradiance vector and the irradiance subscript vector into a maximum interval positioning model to calculate so as to obtain irradiance corresponding to a global maximum power interval;

a maximum power point current analysis and calculation module for constructing the maximum power point current I in the step S43 _pmax And the maximum power point current analysis model is used for inputting the irradiance corresponding to the global maximum power interval into the maximum power point current analysis model. Obtaining a maximum power point reference operating current;

and the PWM tracking control module is used for taking the maximum power point reference running current as an initial value of a conductance increment method, embedding the initial value into the PWM controller through software programming and carrying out maximum pole tracking control.

7. The device as claimed in claim 6, wherein the photovoltaic system multi-pole tracking control device based on the border-positioned conductance increment control is characterized in that the photovoltaic cell irradiance non-measured calculation module is used for calculating the current I and the ambient temperature T according to the photovoltaic cell operating voltage V and the ambient temperature T _air Using the formula in step S21, the irradiance S ═ f is calculated ^-1 (I)。

8. The photovoltaic system multipole point tracking control device based on boundary positioning conductance increment control according to claim 6, wherein the photovoltaic array multipole point maximum interval positioning module comprises:

irradiance vector positive direction arrangement sub-dieBlock for coupling S _i Arranging the irradiance vectors S from small to large;

the irradiance subscript vector submodule is used for screening the irradiance vector S according to the following inequality in sequence;

and the photovoltaic array multipole point maximum interval positioning submodule is used for constructing the photovoltaic array multipole point maximum interval positioning model in the step S41 through photovoltaic array dynamic characteristic analysis.

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