CN105892551A - Method and device for determining overall maximum output power - Google Patents

Method and device for determining overall maximum output power Download PDF

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CN105892551A
CN105892551A CN 201610195090 CN201610195090A CN105892551A CN 105892551 A CN105892551 A CN 105892551A CN 201610195090 CN201610195090 CN 201610195090 CN 201610195090 A CN201610195090 A CN 201610195090A CN 105892551 A CN105892551 A CN 105892551A
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power
test
photovoltaic array
initial
maximum
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CN 201610195090
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CN105892551B (en )
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徐志武
顾桂磊
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华为技术有限公司
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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05FSYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00Automatic 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
    • G05F1/66Regulating electric power
    • G05F1/67Regulating electric power to the maximum power available from a generator, e.g. from solar cell
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion electric or electronic aspects
    • Y02E10/58Maximum power point tracking [MPPT] systems

Abstract

The invention discloses a method and device for determining overall maximum output power. The method comprises the steps that initial power corresponding to a photovoltaic array is acquired; first testing power is generated, and the first testing power is the sum of the initial power and accumulative power; whether the photovoltaic array can stably work or not under the first testing power is detected; if the photovoltaic array cannot stably work under the first testing power, the overall maximum output power of the photovoltaic array is determined according to the initial power. According to the method and device, the overall maximum output power of the photovoltaic array can be accurately acquired, and therefore the power generation capacity of the photovoltaic array can be fully utilized.

Description

全局最大输出功率确定方法与装置 The method of determining the overall maximum output power and device

技术领域 FIELD

[0001 ]本申请涉及自动控制领域,尤其涉及全局最大输出功率确定方法与装置。 [0001] The present application relates to the field of automatic control, in particular, it relates to a method of determining the overall maximum output power and the device.

背景技术 Background technique

[0002]由于在理想的工作环境下,光伏阵列存在一个唯一的最大功率输出点,因此控制设备需要控制光伏阵列在最大输出功率进行工作,才能充分利用光伏阵列的发电能力。 [0002] Since, in an ideal environment, there exists a unique point of maximum power output of the photovoltaic array, the control apparatus needs to be controlled PV array operates at maximum output power, the ability to take advantage of the power generation of the photovoltaic array. 确定光伏阵列最大输出功率的方式有多种,通常被采用的方式是使用最大功率跟踪(maximumpower point tracking,简称:MPPT)跟踪光伏阵列的输出功率,并将MPPT跟踪到的功率峰值点作为光伏阵列最大输出功率。 There are a variety of PV array determining the maximum output power mode, commonly used way is to use the maximum power point tracking (maximumpower point tracking, abbreviation: MPPT) tracking photovoltaic array output power and the power to the MPPT tracking photovoltaic array as a peak point maximum output power.

[0003]但是由于光伏阵列的工作电压和输出电流随着太阳光强度的变化而呈现强烈的非线性变化,因此光伏阵列的输出功率特性曲线可能会存在多个功率峰值点,即光伏阵列的输出功率存在多个峰值输出功率。 [0003] However, the operating voltage and the output current of the photovoltaic array with sunlight intensity variation and show a strong nonlinear changes because the output power characteristic curve of the photovoltaic array of power may exist a plurality of peak points, i.e., the output of the photovoltaic array a plurality of output power of the power peak exists. 在这些峰值输出功率中,只有一个为全局最大输出功率,而其它均为局部最大输出功率,采用MPPP跟踪到的功率峰值点所对应的可能只是局部最大输出功率,而非全局最大输出功率。 In the peak output power, only to a global maximum output power, while others are local maximum output power, but may use local maximum output power corresponding to the peak power MPPP tracking point, rather than the global maximum output power.

[0004]图1为光伏阵列的一个输出功率特性曲线不意图,其中横坐标为输出电压,纵坐标为输出功率。 [0004] Figure 1 is a PV array output power characteristic curve is not intended, wherein the abscissa is the output voltage, the vertical axis is the output power. 从图1中可以看出,光伏阵列的输出功率特性曲线存在局部最大功率A及全局最大功率B两个功率峰值点。 As can be seen from Figure 1, the output power characteristic curve of the photovoltaic array and there is a local maximum power A global maximum power point B two power peaks. 由于在光伏阵列的输出电压降至A点以下时,光伏阵列的输出功率会有一个下降的过程,因此采用MPPP只能跟踪到局部最大功率A。 Since the output voltage of the PV array when the point A is reduced to the following, the output power of the photovoltaic array process will be a decline, so a MPPP local maximum power to only track A. 但是实际上全局最大功率B才是光伏阵列真正的最大输出功率。 But in fact the global maximum power of the PV array B is the true maximum output power. 控制设备控制光伏阵列以局部最大功率A所对应的功率作为输出功率进行电能的输出,会导致所述光伏阵列的发电效率不能被充分利用。 The control device controls the PV array A local maximum power corresponding to the power output power as the output power, the power generation efficiency will lead to the photovoltaic array can not be fully utilized.

[0005]由此可以看出,光伏阵列的输出功率特性曲线存在多个功率峰值点情况下,采用MPPT跟踪到的功率峰值点可能只是局部最大功率,而并非所述光伏阵列真正的全局最大输出功率。 [0005] It can be seen that the output power characteristic curve of the photovoltaic array the presence of a plurality of peak power point, the MPPT tracking using peak power to the maximum power point may be only partial, rather than a true global maximum photovoltaic array output power. 控制设备控制光伏阵列以MPPT跟踪到的功率峰值点所对应的功率作为输出功率,则会导致光伏阵列的发电能力不能被充分利用。 The control device controls the PV array to the MPPT tracking points corresponding to the peak power as the output power of power will cause the generating capacity of the photovoltaic array can not be fully utilized.

发明内容 SUMMARY

[0006]本申请提供了全局最大输出功率确定方法与装置,以解决因此光伏阵列的全局最大输出功率确定不准确,导致光伏阵列的发电能力不能被充分利用问题。 [0006] The present application provides a method of determining the overall maximum output power and the means to resolve a global maximum power output and therefore the PV array is determined inaccurate, resulting in a photovoltaic power generation capacity can not be sufficiently array utilization.

[0007]第一方面,本申请提供了一种全局最大输出功率确定方法,该方法包括:获取与光伏阵列相对应的初始功率;生成第一测试功率,其中,所述第一测试功率为所述初始功率与累加功率之和;检测所述光伏阵列是否能在所述第一测试功率下稳定工作;如果所述光伏阵列不能在所述第一测试功率下稳定工作,那么根据所述初始功率确定所述光伏阵列的全局最大输出功率。 [0007] In a first aspect, the present application provides a method of determining the overall maximum output power, the method comprising: obtaining an initial power corresponding to the PV array; generating a first test power, wherein the power of the first test and said initial power accumulated power sum; detecting whether the photovoltaic array is stable at the first test power; photovoltaic array if the stability is not at the first test power, then the power according to the initial determining the global maximum power output of the PV array. 米用本实现方式,控制设备可以准确的获取光伏阵列的全局最大输出功率,从而可以充分利用光伏阵列的发电能力。 M with this implementation, the control device can accurately obtain the global maximum power output of the photovoltaic array, which can take advantage of the power generation capacity of the photovoltaic array.

[0008]结合第一方面,在第一方面第一种可能的实现方式中,所述方法还包括:如果所述光伏阵列能在所述第k测试功率下稳定工作,那么生成第k+Ι测试功率,其中,所述第一测试功率为所述第k测试功率与所述累加功率之和;检测所述光伏阵列是否能在所述第k+Ι测试功率下稳定工作;如果所述光伏阵列不能在所述第k+Ι测试功率下稳定工作,根据所述第k测试功率确定所述光伏阵列的全局最大输出功率,其中,k的取值为正整数。 [0008] with the first aspect, in a first aspect a first possible implementation, the method further comprising: if the photovoltaic array is stable at the k-th power of the test, then generates a first k + Ι test power, wherein the first test to the k power test power to the power accumulated sum; detecting whether the photovoltaic array is stable in the k + iota under test power; if the photovoltaic the array can not operate stably + k iota under test power, the k test to determine the global maximum power output power of the photovoltaic array, wherein, the value of k is a positive integer. 采用本实现方式,控制设备可以快速确定光伏阵列的全局最大输出功率。 According to the present implementation, the control device can quickly determine a global maximum power output of the PV array.

[0009]结合第一方面第一种可能的实现方式,在第一方面第二种可能的实现方式中,所述根据所述第k测试功率确定所述光伏阵列的全局最大输出功率包括:将所述第k测试功率作为所述光伏阵列的全局最大输出功率。 [0009] combination with the first aspect of the first possible implementation, in a first aspect a second possible implementation manner, the determining of the photovoltaic array from the k test global maximum power output power comprising: the k test power as the global maximum power output of the PV array. 采用本实现方式,可以在控制精度要求不高时,快速的确定光伏阵列的全局最大输出功率。 According to the present implementation, the control may be less precision, rapid global maximum power output of the PV array is determined.

[0010]结合第一方面第一种可能的实现方式,在第一方面第二种可能的实现方式中,所述根据所述第k测试功率确定所述光伏阵列的全局最大输出功率包括:以所述第k测试功率为起始功率对所述光伏阵列进行最大功率跟踪;将采用最大功率跟踪所跟踪到的第一功率峰值点作为光伏阵列全局最大输出功率。 [0010] combination with the first aspect of the first possible implementation, in a first aspect a second possible implementation manner, the determining of the photovoltaic array from the k test global maximum power output power comprising: the k-th power of a starting power of the test to the maximum power point tracking photovoltaic array; using the first peak power point tracking MPPT to as the global maximum output power of the photovoltaic array.

[0011]结合第一方面至第一方面第一至三种可能的实现方式其中任意一种,在第一方面第四种可能的实现方式中,以O为起始功率对所述光伏阵列进行最大功率跟踪;将采用最大功率跟踪所跟踪到的第二功率峰值点作为所述初始功率。 [0011] connection with the first aspect to the first aspect of the first to three possible implementations of any of which, in a first aspect a fourth possible implementation manner, to be O as a starting power of the photovoltaic array maximum power point tracking; will be used a second peak power point tracking to track the maximum power as the initial power.

[0012]第二方面,本申请还提供了一种全局最大输出功率确定装置,所述装置包括用于执行第一方面及第一方面各种实现方式中方法步骤的模块。 [0012] In a second aspect, the present application further provides a global maximum output power determining means, said means comprising a second module for performing a first aspect of the method steps described aspect of the various implementations.

[0013]第三方面,本申请还提供了一种控制设备,该控制设备波包括:所述处理器,用于获取与光伏阵列相对应的初始功率;生成第一测试功率,其中,所述第一测试功率为所述初始功率与累加功率之和;通过所述控制器检测所述光伏阵列是否能在所述第一测试功率下稳定工作;如果所述光伏阵列不能在所述第一测试功率下稳定工作,那么根据所述初始功率确定所述光伏阵列的全局最大输出功率。 [0013] In a third aspect, the present application further provides a control device, the control device waves comprising: a processor for acquiring initial power corresponding to the PV array; generating a first test power, wherein said the first test power as the initial power and the power accumulated sum; by the controller detects whether the photovoltaic array is stable at the first test power; in the first test the photovoltaic array if not a power stability, it is determined that the global maximum output power of the photovoltaic array in accordance with the initial power.

[0014]第四方面,本申请还提供了一种存储介质,该计算机存储介质可存储有程序,该程序执行时可实现包括本申请提供的全局最大输出功率确定方法各实施例中的部分或全部步骤。 [0014] In a fourth aspect, the present application also provides a storage medium, the computer storage medium may store a program, it may be implemented when the program is executed in the embodiment comprises a portion of a global method for determining the maximum output power of each of the embodiments provided herein or all of the steps.

[0015]采用本申请所提供的方法、装置及设备等,可以准确的确定光伏阵列的全局最大输出功率。 [0015] The present application provides the method, apparatus and equipment, can accurately determine a global maximum power output of the PV array.

附图说明 BRIEF DESCRIPTION

[0016]为了更清楚地说明本申请的技术方案,下面将对实施例中所需要使用的附图作简单地介绍,显而易见地,对于本领域普通技术人员而言,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。 [0016] In order to more clearly illustrate the technical solutions of the present application, the accompanying drawings for the need to use a simple embodiment will be described, it will be apparent for those of ordinary skill in the art, without creative efforts of premise, can also obtain other drawings based on these drawings.

[0017]图1为本申请光伏阵列的输出功率特性曲线的一个示意图; A schematic graph of the output characteristics of the photovoltaic array [0017] Figure 1 of the present application;

[0018]图2A为本申请全局最大输出功率确定方法一个实施例的流程示意图; Example schematic flow method of determining a maximum output power of global embodiment [0018] FIG. 2A of the present application;

[0019]图2B为本申请全局最大输出功率确定方法另一个实施例的流程示意图; [0019] Figure 2B embodiment of the method for determining the flow schematic diagram of another embodiment of the present application global maximum output power;

[0020]图3为本申请光伏阵列的输出功率特性曲线的另一个示意图; Another schematic output characteristics [0020] Figure 3 is a curve of the PV array application;

[0021]图4为本申请全局最大输出功率确定装置一个实施例的结构示意图; [0021] FIG 4 a global maximum output power determining means is a schematic structural example of embodiment of the present application;

[0022]图5为本申请控制设备一个实施例的结构示意图。 [0022] Fig 5 a schematic structural diagram of embodiment of a control apparatus of the present application.

具体实施方式 detailed description

[0023]参见图2,为本申请全局最大输出功率确定方法一个实施例的流程示意图。 Determination of [0023] Referring to Figure 2, the present application a global maximum output power flow according to FIG.

[0024]步骤201,确定与光伏阵列相对应的初始功率。 [0024] Step 201, determining the photovoltaic array corresponding to the initial power.

[0025]为缩小确定光伏阵列工作电压时的扫描范围,减少扫描过程中的能量损失,控制设备可以不从光伏阵列的开路电压所对应的功率进行开始进行扫描,而可以确定一个初始功率,从初始功率开始进行扫描,从而减小所述扫描范围。 [0025] The narrow scan range determines the PV array operating voltage, reduce the energy loss in the scanning process, the control device may not be possible to determine an initial power begins to scan from the open circuit voltage of the photovoltaic array corresponding to the power, from start scanning initial power, thereby reducing the scanning range.

[0026]初始功率的确定方式有多种,根据实际需求不同,控制设备可以采用不同的确定方式确定所述初始功率。 There are several ways to determine [0026] the initial power, depending on the actual demand, the control device may use different ways to determine the initial power is determined.

[0027]在一种可能的实现方式中,控制设备可以采用MPPT算法,对光伏阵列的输出功率进行跟踪,从而确定光伏阵列的第一功率峰值点,然后将该功率峰值点所对应的输出功率作为初始功率。 [0027] In one possible implementation, the control device may employ MPPT algorithm, the output power tracking photovoltaic array, thereby determining a first peak power point of the photovoltaic array, then the corresponding output power peak point as the initial power.

[0028]例如如图1所示,可以采用MPPT算法确定局部最大功率A作为第一峰值功率点,然后以局部最大功率A作为初始功率。 [0028] The example shown in Figure 1, MPPT algorithm may determine a first local maximum peak power as the power point A, then A local maximum power as the initial power use.

[0029]在另一种可能的实现方式中,由于光伏阵列理论上可能的最大功率输出点通常会在预定范围内,而该范围则可以通过预先计算得出,因此控制设备也可以首先通过计算确定该预定范围,然后以该预定范围的下限功率作为初始功率。 [0029] In another possible implementation, since the PV array theoretically possible maximum power output point is usually within a predetermined range, and this range can be calculated in advance, the control device may also be calculated by first determining that the predetermined range, then the lower limit of the predetermined range of power as the initial power.

[0030] 例如如图3所示,当通过计算确定最大功率输出点在Pl至P2之间时,可以以Pl即C点的功率,作为初始功率。 [0030] The example shown in Figure 3, when it is determined by calculating the maximum power output point between Pl to P2, i.e., the point C may be power Pl, as the initial power.

[0031 ]步骤202,根据所述初始功率生成第一测试功率。 [0031] Step 202, the initial power generated in accordance with a first test power.

[0032]在初始功率确定之后,控制设备可以在初始功率的基础上增加累加功率△得到第一测试功率。 [0032] After the initial power is determined, the control device can increase the initial power on the basis of the accumulated power to give a first test power △. 其中,累加功率△的取值可以根据需要进行设定,通常情况下所述的累加功率A可以根据所述光伏阵列输出功率的控制精度要求进行设置,所述光伏阵列输出功率的控制精度越高,则所述累加功率A的取值越小。 Wherein the accumulated value of △ power can be set as needed, usually the accumulation A power control can be set according to the accuracy of the output power of the photovoltaic array, the higher the control accuracy of the output power of the photovoltaic array value, then the accumulated power a is smaller.

[0033]可选的,当以预定范围的下限功率作为初始功率时,可以将所述预定范围的η分之一作为所述累加功率A的取值,其中,η的取值为不小于I的正整数。 [0033] Alternatively, when the power to the lower limit of the predetermined range as the initial power, [eta] may be one of the predetermined range as a fraction of the accumulated power value A, wherein, [eta] is not less than the value I positive integer. 通常情况下,η的取值可以是由最大扫描次数决定。 Typically, η values ​​may be determined by the maximum number of scans.

[0034]如图3所示,所述预设范围为Pl待Ρ2之间时可以将预设范围的二分之一作为累加功率△ 42与Ρ3之间的功率差为所述累加功率△,Ρ3与Pl之间的功率差也为所述累加功率 [0034] As shown in FIG. 3, the predetermined range is between Pl Ρ2 can be one-half the predetermined range as the cumulative power difference between the power Ρ3 △ 42 and △ is the accumulated power, Ρ3 and the power difference between the accumulated power is also Pl

Δ 0 Δ 0

[0035]可选的,累加功率△的取值也可以由控制设备在光伏阵列的输出功率时的控制精度决定,根据控制设备的控制精度不同,累加功率A的取值也可以各不相同。 [0035] Optionally, the power accumulated values ​​of △ may be determined by the control accuracy of the control device when the output power of the photovoltaic array, depending on the control precision of the control device, the power cumulative value of A may vary.

[0036]例如,控制设备可以以千瓦为单位调整光伏阵列的输出功率时,所述累加功率Δ的取值可以为I千瓦;而当控制设备可以以瓦为单位调整光伏阵列的输出功率时,所述累加功率Δ的取值则可以为I瓦。 [0036] For example, the control device may adjust in kilowatts of output power of the photovoltaic array, the accumulated value of the power can be Δ I kilowatts; and when the control device may be adjusted in watts output power of the PV array, the accumulated value of the power may be that Δ I tile.

[0037]步骤203,检测所述光伏阵列是否能在所述第一测试功率下稳定工作。 [0037] Step 203, detecting whether the photovoltaic array is stable at the first test power.

[0038]在第一测试功率确定之后,控制设备可以将所述光伏阵列中逆变器的直流输入功率设置为所述第一测试功率。 [0038] After the first test power is determined, the control device DC input power inverter in the photovoltaic array may be set to the first test power.

[0039]由于光伏阵列生成的是直流电,因此在实际使用中,还需要使用逆变器将光伏阵列所生成的直流电转换为交流电。 [0039] Since the direct current generated by the PV array, so in practical use, also need to use an inverter to the PV array generated DC to AC. 因此,控制设备可以通过在将所述逆变器的直流输入功率设置为所述第一测试功率后,可以根据所述逆变器的直流输入电压是否稳定,判断光伏阵列是否能在所述第一测试功率下稳定工作。 Thus, by the control device after the DC input power of the inverter is provided to power the first test to be stable if the DC input voltage of the inverter, can be determined whether the first photovoltaic array a stability test under power.

[0040]如果所述光伏阵列能够在第一测试功率下稳定的工作,那么所述逆变器的直流输入电压会保持稳定。 [0040] If the photovoltaic array is capable of stably operating in a first test power, then the DC input voltage of the inverter will remain stable. 如果所述光伏阵列不能够在第一测试功率下稳定的工作,那么所述逆变器的直流输入电压则会逐渐下降直至触发欠压保护。 If the photovoltaic array can not be stabilized at a first power test work, the DC input voltage of the inverter will be progressively lowered until the trigger voltage protection.

[0041]步骤204,如果所述光伏阵列不能在所述第一测试功率下稳定工作,那么根据所述初始功率确定所述光伏阵列的全局最大输出功率。 [0041] Step 204, if the photovoltaic array is not stable with the first test power, then the global maximum power output of the photovoltaic array is determined based on the initial power.

[0042]如果所述光伏阵列不能在所述第一测试功率下稳定工作,那么就可以认为所述初始功率即为所述光伏阵列的全局最大输出功率,从而可以将所述初始功率所对应的输出电压,即初始功率下所述逆变器直流输入电压,作为所述光伏阵列的工作电压。 [0042] If the stability is not the photovoltaic array at the first test power, it can be considered the initial global power is the maximum output power of the photovoltaic array so as to be corresponding to the initial power output voltage, i.e., the inverter DC input voltage at an initial power, as an operating voltage of the photovoltaic array.

[0043]步骤205,如果所述光伏阵列能在所述第k测试功率下稳定工作,那么根据所述第k测试功率确定第k+Ι测试功率。 [0043] Step 205, if the photovoltaic array is stable at the k-th power of the test, it is determined that the first k + Ι test power from the k test power.

[0044]如果所述光伏阵列能够在第k测试功率下稳定的工作,那么说明第k测试功率不大于光伏阵列的全局最大输出功率,因此可以进一步扫描以确定光伏阵列的最大输出功率。 [0044] If the photovoltaic array can be stabilized at the k-th power of the test work, then the k-described test power less than the overall maximum output power of the photovoltaic array, can be further scanned to determine a maximum output power of the photovoltaic array.

[0045]控制设备可以在第k测试功率的基础上增加累加功率△得到第k测试功率。 [0045] The control device may be increased on the basis of the k-th power of the test power accumulated on the k △ obtained test power. 其中,k为正整数。 Wherein, k is a positive integer. 例如,控制设备可以在第一测试功率的基础上增加累加功率A得到第二测试功率。 For example, the control device may increase the power on the basis of the first test on the accumulated power to give A second test power.

[0046]如图3所示,如果所述第k测试功率为P3那么,所述光伏阵列能够在第k测试功率下稳定的工作。 [0046] 3, if the k-th power of P3 then test the photovoltaic array can be stabilized at the k-th power of the test work. 此时可以在P3的基础上增加△,作为第k+Ι测试功率,S卩,将Pl作为所述第k+1测试功率。 At this time, P3 can be increased on the basis of △, k + Ι as the test power, S Jie, the Pl k + 1 as the first test power.

[0047]步骤206,如果所述光伏阵列不能在所述第k+Ι测试功率下稳定工作,根据所述第k测试功率确定所述光伏阵列的全局最大输出功率。 [0047] Step 206, if the photovoltaic array can operate stably under k + iota the test power, the k power determination test of the photovoltaic array global maximum output power.

[0048]在第k+Ι测试功率确定之后,控制设备可以将所述光伏阵列中逆变器直流输入功率的设置为第k+Ι测试功率所对应的电压。 [0048] After the first k + Ι test power determined, the control device may be a photovoltaic array of the inverter DC input power to a set of k + Ι voltage corresponding to the test power. 如果所述光伏阵列不能在所述第k+Ι测试功率下稳定工作,那么就可以认为所述第k测试功率即为所述光伏阵列的全局最大输出功率,从而可以将所述第k测试功率所对应的输出电压,即在第k测试功率下所述逆变器直流输入电压,作为所述光伏阵列的工作电压。 If the photovoltaic array can operate stably under k + iota the test power, it can be considered is the power of the k-th test the global maximum power output of the photovoltaic array, thereby testing the k-th power corresponding to the output voltage, i.e., a test power at the k-th input of the inverter DC voltage as an operating voltage of the photovoltaic array.

[0049]由于第一测试功率至第k+Ι测试功率之间相互离散,第k测试功率与第k+Ι测试功率之间相差累加功率A,因此如果光伏阵列能够在输出功率为第k测试功率时稳定的工作,但是不能在输出功率为第k+Ι测试功率时稳定的工作,那么光伏阵列的实际全局最大输出功率可能并非第k测试功率,而是会大于第k测试功率但小于第k+Ι测试功率。 [0049] Since each discrete power between the first test to the test power of the k + Ι, A difference between the accumulated power of the test power in the first k k + Ι test power, so if the output power of the photovoltaic array can be tested for the first k when stable power operation, but not in the output power of the k + Ι stable when the test power operation, then the actual overall maximum output power of the photovoltaic array may not be the k-th power of the test, but may be greater than and less than the k-th power of the test k + Ι test power.

[0050]例如,当光伏阵列的输出功率特性曲线如图3所示时,如果所述光伏阵列不能在功率为Pl时正常工作,但是能够在功率为P3时正常工作,那么所述光伏阵列的最大输出光功率可能是B。 [0050] For example, when the output power characteristic curve of the photovoltaic array shown in Figure 3, if the photovoltaic array at power Pl not work, but able to work when the power P3, the photovoltaic array is then maximum output optical power may be B.

[0051]如果控制精度要求较高,在根据所述第k测试功率确定所述光伏阵列的全局最大输出功率时,可以在第k测试功率确定之后,采用MPPT算法进行跟踪从而确定光伏阵列全局最大输出功率的精确值,或者与所述第k测试功率作为初始功率,设置一个小于累加功率△的第二累加功率值,并再次执行步骤302至步骤305。 [0051] If the control of high precision, when the k test determining the global maximum power output power of the photovoltaic array, the test may be performed after the k-th power determining, using MPPT algorithm for tracking photovoltaic array so as to determine the global maximum the exact value of the output power, or the k-th power as the initial power of the test, is provided a second accumulated value is smaller than the power of △ accumulated power, and step 302 to step 305 again.

[0052]如果所述光伏阵列不能在所述第k+Ι测试功率下稳定工作,那么控制设备可以从k测试功率开始,采用MPPT算法对光伏阵列的输出功率进行跟踪,从而确定光伏阵列的第二功率峰值点,然后将该功率峰值点所对应的输出功率作为全局最大输出功率。 [0052] If the photovoltaic array can operate stably under k + iota the test power, the control device may start from the k test power using output power MPPT algorithm for tracking photovoltaic array, the photovoltaic array to determine the first second power peak point, then the power peak point corresponding to a global maximum output power as the output power.

[0053]例如,当光伏阵列的输出功率特性曲线如图3所示时,控制设备可以以D点所对应的功率进行作为初始功率,采用MPPT算法对光伏阵列的输出功率进行跟踪,从而确定B点为光伏阵列的第二功率峰值点。 [0053] For example, when the output power characteristic curve of the photovoltaic array shown in Figure 3, the control device may be used as initial power using output power MPPT algorithm for tracking photovoltaic array to a power corresponding to the point D, to determine B the second point is the point of peak power of the PV array.

[0054]在所述输出功率确定之后,可以控制所述光伏阵列与以所述全局最大输出功率进行输出,从而可以使所述光伏阵列的发电能力能够被充分利用。 [0054] After determining the output power can be controlled with the output of the photovoltaic array to the global maximum output power, thereby causing the photovoltaic array generation capacity can be fully utilized.

[0055]参见图4为本申请全局最大输出功率确定装置一个实施例的结构示意图。 [0055] Referring to FIG 4 a global maximum output power determining means a schematic structural diagram of the embodiment of the present application.

[0056] 如图4所示,该装置可以包括:获取单元401,生成单元402,检测单元403及确定单元404。 [0056] As shown in FIG 4, the apparatus may comprise: an obtaining unit 401, a generating unit 402, detection unit 403 and the determination unit 404.

[0057]其中,获取单元401,用于获取与光伏阵列相对应的初始功率;生成单元402,用于生成第一测试功率,其中,所述第一测试功率为所述初始功率与累加功率之和;检测单元403,用于检测所述光伏阵列是否能在所述第一测试功率下稳定工作;确定单元404,用于当所述光伏阵列不能在所述第一测试功率下稳定工作时,根据所述初始功率确定所述光伏阵列的全局最大输出功率。 [0057] The obtaining unit 401 for obtaining the initial power corresponding to the PV array; generating unit 402, for generating a first test power, wherein the first test power as the initial power of the power accumulated and; detecting unit 403 for detecting whether the photovoltaic array is stable at the first test power; determining unit 404, when the photovoltaic array for stability when not in the first test power, global maximum output power of the photovoltaic array is determined according to the initial power.

[0058]可选的,所述生成单元402,还用于在所述光伏阵列能在所述第k测试功率下稳定工作时,生成第k+Ι测试功率,其中,所述第一测试功率为所述第k测试功率与所述累加功率之和;所述检测单元403,还用于检测所述光伏阵列是否能在所述第k+Ι测试功率下稳定工作;所述确定单元404,还用于在所述光伏阵列不能在所述第k+Ι测试功率下稳定工作时,根据所述第k测试功率确定所述光伏阵列的全局最大输出功率,其中,k的取值为正整数。 [0058] Optionally, the generating unit 402 is further configured to, when the photovoltaic array is stable at the k-th power of the test, to generate a first k + Ι test power, wherein the first test power said k-th power of the test power accumulated sum; the detecting unit 403, further for detecting whether the photovoltaic array is stable at the test power of the k + Ι; the determining unit 404, It is also used when the PV array does not work in stabilizing the k + iota under test power, the k test to determine the global maximum power output power of the photovoltaic array, wherein, the value of k is a positive integer .

[0059] 可选的,所述确定单元404包括:第一跟踪子单元,用于以所述第k测试功率为起始功率对所述光伏阵列进行最大功率跟踪;第一确定子单元,用于将采用最大功率跟踪所跟踪到的第一功率峰值点作为光伏阵列全局最大输出功率。 [0059] Alternatively, the determination unit 404 comprises: a first sub-tracking unit is configured to test power of the k initial power of the maximum power point tracking photovoltaic array; a first determining sub-unit, with a first peak power will be used to point to the maximum power tracking of the tracking photovoltaic array as the global maximum output power.

[0060]可选的,所述确定单元404,具体用于将所述第k测试功率作为所述光伏阵列的全局最大输出功率。 [0060] Alternatively, the determination unit 404, specifically for the global maximum output power of the k-th power as a test of the photovoltaic array.

[0061]可选的,所述获取单元401包括:第二跟踪子单元,用于以O为起始功率对所述光伏阵列进行最大功率跟踪;第二确定子单元,用于将采用最大功率跟踪所跟踪到的第二功率峰值点作为所述初始功率。 [0061] Optionally, the obtaining unit 401 includes: a second sub-tracking unit for the photovoltaic array O MPPT starting power; a second determining sub-unit, configured to use the maximum power to track the tracking point as the second power of the initial peak power.

[0062]参见图5为本申请控制设备一个实施例的结构示意图。 [0062] Referring to Figure 5 a schematic structural diagram of embodiment of a control apparatus of the present application. 所述控制设备可以执行图2相对应实施例中的方法步骤,从而确定光伏阵列的输出功率,并控制光伏阵列的输出功率。 The control device may perform the method steps of FIG. 2 with respect to the embodiment should be implemented to determine the output power of the photovoltaic array, and to control the output power of the photovoltaic array.

[0063] 如图5所示,所述控制设备包括:处理器501、存储器502及控制器503。 As shown in [0063] FIG 5, the control apparatus comprising: a processor 501, memory 502 and controller 503.

[0064] 如图5所示,所述服务器包括处理器505、存储器502、通信单元503。 As shown in [0064] FIG. 5, the server includes a processor 505, a memory 502, a communication unit 503. 这些组件通过一条或多条总线进行通信。 These components communicate via one or more buses. 本领域技术人员可以理解,图中示出的服务器的结构并不构成对本发明的限定,它既可以是总线形结构,也可以是星型结构,还可以包括比图示更多或更少的部件,或者组合某些部件,或者不同的部件布置。 Those skilled in the art will appreciate, the figures shown in the structure of the server do not limit the present invention, It may be a bus-like structure, may be star structure may further comprise more or fewer than the illustrated member, or a combination of some of the components, or a different arrangement of components.

[0065]处理器505为控制设备的控制中心,利用各种接口和线路连接整个控制设备的各个部分,通过运行或执行存储在存储器502内的软件程序和/或模块,以及调用存储在存储器502内的数据,以执行控制设备的各种功能和/或处理数据。 [0065] The control processor 505 is the center of the device, using a variety of interfaces and parts of the entire line connection control equipment, by running or executing software programs stored in memory 502 and / or modules and invoking stored in memory 502 data in order to perform various functions of the control device and / or process data. 所述处理器505可以由集成电路(integrated circuit,简称IC)组成,例如可以由单颗封装的IC所组成,也可以由连接多颗相同功能或不同功能的封装IC而组成。 The processor 505 may be formed of an integrated circuit (integrated circuit, referred to as IC) composed of, for example, a single packaged IC composed, may be connected to multiple pieces of the same function or different functions of the IC package composition. 举例来说,处理器505可以仅包括中央处理器(central processing unit,简称CPU),也可以是数字信号处理器(digital signalprocessor,简称DSP)。 For example, processor 505 may include only a central processing unit (central processing unit, referred to as the CPU), or may be a digital signal processor (digital signalprocessor, referred to as DSP).

[0066] 所述控制器503用于控制光伏阵列的输出功率。 [0066] The controller 503 for controlling the output power of the photovoltaic array. 例如,处理器可以通过控制器控制光伏阵列的输出功率、输出电压等,处理器也可以通过所述控制器控制及检测逆变器的直流输入电压、输入功率等,本发明实施例对此不作具体限定。 For example, the processor may control the output power, the output voltage of the PV array or the like by the controller, the processor may be through a DC input voltage detector and the controller controls the inverter input power and the like, embodiments of the present invention does not particularly limited.

[0067]存储器502可用于存储软件程序以及模块,处理器通过运行存储在存储器502的软件程序以及模块,从而执行控制设备的各种功能应用以及实现数据处理。 [0067] The memory 502 may be used to store software programs and modules, by a processor running software programs and modules stored in the memory 502 to perform various functions of the control device and for data processing applications.

[0068]在本发明的一种实现方式中,所述处理器501,用于获取与光伏阵列相对应的初始功率;生成第一测试功率,其中,所述第一测试功率为所述初始功率与累加功率之和;通过所述控制器503检测所述光伏阵列是否能在所述第一测试功率下稳定工作;如果所述光伏阵列不能在所述第一测试功率下稳定工作,那么根据所述初始功率确定所述光伏阵列的全局最大输出功率。 [0068] In one implementation of the present invention, the processor 501, for obtaining the initial power corresponding to the PV array; generating a first test power, wherein the first test power as the initial power the cumulative sum of the power; detecting whether the photovoltaic array 503 is stable at the first test by said power controller; not stabilized if the photovoltaic array operating in the first test power, then according to the determining the initial power of said global maximum output power of the photovoltaic array.

[0069] 可选的,所述处理器501,还用于如果所述光伏阵列能在所述第k测试功率下稳定工作,那么生成第k+Ι测试功率,其中,所述第一测试功率为所述第k测试功率与所述累加功率之和;通过书所述控制器503检测所述光伏阵列是否能在所述第k+Ι测试功率下稳定工作;如果所述光伏阵列不能在所述第k+Ι测试功率下稳定工作,根据所述第k测试功率确定所述光伏阵列的全局最大输出功率,其中,k的取值为正整数。 [0069] Optionally, the processor 501 is further configured to, if the photovoltaic array is stable at the k-test power, the generated power of the k + Ι test, wherein the first test power said k-th power of the test power accumulated sum; book by whether the controller 503 detects the photovoltaic array is stable in the k + iota under test power; if the photovoltaic array is not in the k + Ι at said first power stability test, the k test to determine the global maximum power output power of the photovoltaic array, wherein, the value of k is a positive integer.

[0070] 可选的,所述处理器501,还用于如果所述光伏阵列不能在所述第k+Ι测试功率下稳定工作,将所述第k测试功率作为所述光伏阵列的全局最大输出功率。 [0070] Optionally, the processor 501, the photovoltaic array further if not for stability in the k + iota under test power, the k-th power as a global test of the photovoltaic array the maximum Output Power.

[0071] 可选的,所述处理器501,还用于以所述第k测试功率为起始功率通过所述控制器503对所述光伏阵列进行最大功率跟踪;将采用最大功率跟踪所跟踪到的第一功率峰值点作为光伏阵列全局最大输出功率。 [0071] Optionally, the processor 501 is further configured to test power in the k th maximum power point tracking of the photovoltaic array 503 pairs by the controller as a starting power; will be used to track the maximum power point tracking the first peak point as the power global maximum output power of the PV array.

[0072]可选的,以O为起始功率通过所述控制器503对所述光伏阵列进行最大功率跟踪;将采用最大功率跟踪所跟踪到的第二功率峰值点作为所述初始功率。 [0072] Alternatively, a starting power to O MPPT performed by the controller 503 of the photovoltaic array; using the second peak power point tracking to track the maximum power as the initial power.

[0073]具体实现中,本发明还提供一种计算机存储介质,其中,该计算机存储介质可存储有程序,该程序执行时可包括本发明提供的呼叫方法的各实施例中的部分或全部步骤。 [0073] In specific implementation, the present invention also provides a computer storage medium, wherein the computer storage medium may store a program, the program may include a portion or all of the embodiments of the method steps of each embodiment of the present invention provides a call when executed . 所述的存储介质可为磁碟、光盘、只读存储记忆体(read-only memory,简称:ROM)或随机存储记忆体(random access memory,简称:RAM)等。 The storage medium may be a magnetic disk, an optical disk, read-only memory (read-only memory, referred to: ROM) or a random access memory (random access memory, referred to as: RAM) and the like.

[0074]本领域的技术人员可以清楚地了解到本发明实施例中的技术可借助软件加必需的通用硬件平台的方式来实现。 [0074] Those skilled in the art may clearly understand that may be implemented by software plus a necessary universal hardware platform technology in the embodiment of the present invention. 基于这样的理解,本发明实施例中的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来,该计算机软件产品可以存储在存储介质中,如R0M/RAM、磁碟、光盘等,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本发明各个实施例或者实施例的某些部分所述的方法。 Based on this understanding, technical solutions of the embodiments in the present invention or the part contributing to the prior art may be embodied in a software product out of the computer software product may be stored in a storage medium, such as a R0M / RAM , a magnetic disk, an optical disk, and include several instructions that enable a computer device (may be a personal computer, a server, or network device) to perform various method embodiments or some parts of the embodiment of the present invention.

[0075]本说明书中的各个实施例均采用递进的方式描述,各个实施例之间相同相似的部分互相参见即可。 [0075] In the present specification, various embodiments are described in a progressive manner, between similar portions of the same embodiment of various embodiments refer to each other. 尤其,对于装置实施例及控制设备实施例而言,由于其基本相似于方法实施例,所以描述的比较简单,相关之处参见方法实施例中的说明即可。 In particular, embodiments for apparatus and a control apparatus of the embodiment, since it is basically similar to the method embodiments, the description is relatively simple, can be described in the embodiments Referring to the embodiment of the method of correlation.

[0076]以上所述的本发明实施方式并不构成对本发明保护范围的限定。 [0076] The above-described embodiments of the present invention do not limit the scope of the present invention.

Claims (10)

  1. 1.一种全局最大输出功率确定方法,其特征在于,包括: 获取与光伏阵列相对应的初始功率; 生成第一测试功率,其中,所述第一测试功率为所述初始功率与累加功率之和; 检测所述光伏阵列是否能在所述第一测试功率下稳定工作; 如果所述光伏阵列不能在所述第一测试功率下稳定工作,那么根据所述初始功率确定所述光伏阵列的全局最大输出功率。 CLAIMS 1. A method of determining the overall maximum output power, characterized by comprising: acquiring an initial power corresponding to the PV array; generating a first test power, wherein the first test power as the initial power of the power accumulated and; detecting whether the photovoltaic array is stable at the first test power; photovoltaic array if the stability is not at the first test power, it is determined that the global photovoltaic array in accordance with the initial power maximum output power.
  2. 2.如权利要求1所述的方法,其特征在于,所述方法还包括: 如果所述光伏阵列能在所述第k测试功率下稳定工作,那么生成第k+Ι测试功率,其中,所述第一测试功率为所述第k测试功率与所述累加功率之和; 检测所述光伏阵列是否能在所述第k+Ι测试功率下稳定工作; 如果所述光伏阵列不能在所述第k+Ι测试功率下稳定工作,根据所述第k测试功率确定所述光伏阵列的全局最大输出功率,其中,k的取值为正整数。 2. The method according to claim 1, wherein said method further comprises: if the photovoltaic array is stable at the k-test power, the generated power of the k + Ι test, wherein the said first test power to the k power to the test power accumulated sum; detecting whether the photovoltaic array is stable at the test power of the k + Ι; if not the first in the photovoltaic array k + Ι lower power stability test, the k test to determine the global maximum power output power of the photovoltaic array, wherein, the value of k is a positive integer.
  3. 3.如权利要求2所述的方法,其特征在于,所述根据所述第k测试功率确定所述光伏阵列的全局最大输出功率包括: 将所述第k测试功率作为所述光伏阵列的全局最大输出功率。 3. The method according to claim 2, wherein said determining the overall maximum output power of the photovoltaic array includes the k power testing: testing the k-th power of the photovoltaic array as the global maximum output power.
  4. 4.如权利要求2所述的方法,其特征在于,所述根据所述第k测试功率确定所述光伏阵列的全局最大输出功率包括: 以所述第k测试功率为起始功率对所述光伏阵列进行最大功率跟踪; 将采用最大功率跟踪所跟踪到的第一功率峰值点作为光伏阵列全局最大输出功率。 4. The method according to claim 2, wherein said determining the overall maximum output power of the photovoltaic array includes the k power test: A test of the k-th power of the initial power maximum power tracking photovoltaic array; using the first peak power point tracking MPPT to as the global maximum output power of the photovoltaic array.
  5. 5.如权利要求1至4任一项所述的方法,其特征在于,所述获取与光伏阵列相对应的初始功率包括: 以O为起始功率对所述光伏阵列进行最大功率跟踪; 将采用最大功率跟踪所跟踪到的第二功率峰值点作为所述初始功率。 1 to 5. The method of any of claims 1-4, wherein the obtaining the initial power corresponding to the photovoltaic array comprising: O to the maximum power point tracking photovoltaic array as a starting power; and using a second peak power point tracking to track the maximum power as the initial power.
  6. 6.一种全局最大输出功率确定装置,其特征在于,包括: 获取单元,用于获取与光伏阵列相对应的初始功率; 生成单元,用于生成第一测试功率,其中,所述第一测试功率为所述初始功率与累加功率之和; 检测单元,用于检测所述光伏阵列是否能在所述第一测试功率下稳定工作; 确定单元,用于当所述光伏阵列不能在所述第一测试功率下稳定工作时,根据所述初始功率确定所述光伏阵列的全局最大输出功率。 A global maximum output power determining means, characterized by comprising: an acquisition unit for acquiring initial power corresponding to the PV array; generating means for generating a first test power, wherein the first test power as the initial power and the power accumulated sum; detecting means for detecting whether the photovoltaic array is stable at the first test power; determining means for, when the first photovoltaic array can not be said when the power of a stability test, the global maximum output power of the photovoltaic array is determined according to the initial power.
  7. 7.如权利要求6所述的装置,其特征在于, 所述生成单元,还用于在所述光伏阵列能在所述第k测试功率下稳定工作时,生成第k+I测试功率,其中,所述第一测试功率为所述第k测试功率与所述累加功率之和; 所述检测单元,还用于检测所述光伏阵列是否能在所述第k+Ι测试功率下稳定工作;所述确定单元,还用于在所述光伏阵列不能在所述第k+Ι测试功率下稳定工作时,根据所述第k测试功率确定所述光伏阵列的全局最大输出功率,其中,k的取值为正整数。 7. The apparatus according to claim 6, wherein the generating unit is further configured to, when the photovoltaic array is stable at the k-th power of the test, to generate a first test power k + I, wherein , the first test of the k-th power of the test power to the power accumulated sum; the detection unit is further for detecting whether the photovoltaic array is stable at the test power of the k + Ι; the determination unit is further configured to, when the photovoltaic array is not stable with the test power of the k + Ι, the k test to determine the global maximum power output power of the photovoltaic array, wherein, the k The value is a positive integer.
  8. 8.如权利要求6所述的装置,其特征在于,所述确定单元包括: 第一跟踪子单元,用于以所述第k测试功率为起始功率对所述光伏阵列进行最大功率跟踪; 第一确定子单元,用于将采用最大功率跟踪所跟踪到的第一功率峰值点作为光伏阵列全局最大输出功率。 8. The apparatus according to claim 6, wherein said determining means comprises: a first sub-tracking unit is configured to test power of the k initial power of the maximum power point tracking photovoltaic array; a first determining subunit, configured to use a first peak power point tracking MPPT to as the global maximum output power of the photovoltaic array.
  9. 9.如权利要求6所述的装置,其特征在于, 所述确定单元,具体用于将所述第k测试功率作为所述光伏阵列的全局最大输出功率。 9. The apparatus according to claim 6, wherein the determining unit is configured to output power to the global maximum of k as a test power of the photovoltaic array.
  10. 10.如权利要求6至9任一项所述的装置,其特征在于,所述获取单元包括: 第二跟踪子单元,用于以O为起始功率对所述光伏阵列进行最大功率跟踪; 第二确定子单元,用于将采用最大功率跟踪所跟踪到的第二功率峰值点作为所述初始功率。 10. The device according to any one of claims 6-9, wherein said obtaining unit comprises: a second sub-tracking unit for O as a starting power of the maximum power point tracking photovoltaic array; second determining sub-unit, configured to use the second peak power point tracking to track the maximum power as the initial power.
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