CN104076313A - Online calibration device for solar simulator electronic load case - Google Patents
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Abstract
本发明公开了太阳模拟器电子负载箱在线校准装置，用于在线校准太阳模拟器电子负载箱的电流、电压、功率的测量准确度，包括光伏组件(1)、Y型三通连接器(2)、快速数据采集器(3)、霍尔闭环电流传感器(4)和计算机(5)。该在线校准装置检测所得信号是快速数据采集器(3)采集的信号，一个信号是经霍尔闭环电流传感器I-V转换后所得电压信号，另一个信号是光伏组件(1)输出的电压信号，这两个信号经快速数据采集器(3)进行AD转换后输出给计算机(5)，由计算机(5)显示数据曲线。利用本发明，解决了瞬态条件下校准太阳模拟器电子负载箱的技术难点，并同时校准电流、电压、功率测量准确度，实现IV曲线的校准。
The invention discloses an online calibration device for an electronic load box of a solar simulator, which is used for online calibration of the measurement accuracy of current, voltage and power of an electronic load box of a solar simulator, comprising a photovoltaic module (1), a Y-shaped three-way connector (2 ), a fast data collector (3), a Hall closed-loop current sensor (4) and a computer (5). The signal detected by the online calibration device is the signal collected by the fast data collector (3), one signal is the voltage signal obtained after the IV conversion of the Hall closed-loop current sensor, and the other signal is the voltage signal output by the photovoltaic module (1), which The two signals are output to the computer (5) after AD conversion by the fast data collector (3), and the data curve is displayed by the computer (5). The invention solves the technical difficulty of calibrating the electronic load box of the solar simulator under transient conditions, and simultaneously calibrates the measurement accuracy of current, voltage and power to realize the calibration of the IV curve.
Description
技术领域technical field
本发明涉及太阳模拟器电子负载箱校准技术领域，具体涉及一种太阳模拟器电子负载箱在线校准装置，用于在线校准太阳模拟器电子负载箱的电流、电压、功率的测量准确度。The invention relates to the technical field of solar simulator electronic load box calibration, in particular to an online solar simulator electronic load box calibration device for online calibration of the measurement accuracy of current, voltage and power of the solar simulator electronic load box.
背景技术Background technique
太阳模拟器是模拟自然太阳光谱和辐照度的一种光源设备，通常由光源和电源、光学部件和滤光片、控制操作系统、电子负载箱等组成。与真实太阳相比，太阳模拟器具有稳定性强、不受天气变化影响等优点。电子负载箱作为太阳模拟最为核心的部件被普遍应用于光伏组件及太阳电池光电性能(如短路电流、开路电压、最大功率、转换效率、填充因子等)的测试，其性能的优劣决定了光伏组件及太阳电池光电性能测量的准确性，并直接影响到组件贸易结算过程中的经济利益及最终光伏电站的实际应用及评估。国内外市场现有太阳模拟器电子负载箱性能良莠不齐，在很大程度上存在对光伏组件功率测量结果的误判。为了保证其测量的准确性，必须对太阳模拟器电子负载箱进行校准。A solar simulator is a light source device that simulates the natural solar spectrum and irradiance. It usually consists of a light source and power supply, optical components and filters, a control operating system, and an electronic load box. Compared with the real sun, the solar simulator has the advantages of strong stability and no influence of weather changes. As the core component of solar simulation, the electronic load box is widely used in the testing of photovoltaic modules and solar cell photoelectric performance (such as short-circuit current, open-circuit voltage, maximum power, conversion efficiency, fill factor, etc.), and its performance determines the photovoltaic performance. The accuracy of photoelectric performance measurement of components and solar cells directly affects the economic benefits in the process of component trade settlement and the actual application and evaluation of the final photovoltaic power station. The performance of electronic load boxes of existing solar simulators in the domestic and foreign markets is uneven, and there is a large degree of misjudgment of the power measurement results of photovoltaic modules. In order to ensure the accuracy of its measurement, the electronic load box of the solar simulator must be calibrated.
现对太阳模拟器电子负载箱的校准大多需要将电子负载箱拆离模拟器，然后寄至计量认证机构进行校准，且周期较长，在很大程度上降低了太阳模拟器的利用效率，影响了光伏企业的产能。并且，离线校准通常采用稳压源和稳流源作为信号输入，分别测试电子负载箱电流、电压的测量准确度，与实际应用过程中多为瞬态采集的取样模式存在不同，可能会引入测量误差。Most of the current calibration of the electronic load box of the solar simulator requires the electronic load box to be detached from the simulator, and then sent to a metrology and certification agency for calibration, and the cycle is long, which greatly reduces the utilization efficiency of the solar simulator and affects The production capacity of photovoltaic enterprises. In addition, the off-line calibration usually uses the regulated voltage source and the regulated current source as the signal input to test the measurement accuracy of the electronic load box current and voltage respectively, which is different from the sampling mode that is mostly transient acquisition in the actual application process, and may introduce measurement error.
发明内容Contents of the invention
(一)要解决的技术问题(1) Technical problems to be solved
有鉴于此，本发明的主要目的是提供一种太阳模拟器电子负载箱在线校准装置，以解决瞬态条件下校准太阳模拟器电子负载箱的技术难点，并同时校准电流、电压、功率测量准确度，实现IV曲线的校准。In view of this, the main purpose of the present invention is to provide a solar simulator electronic load box online calibration device to solve the technical difficulties of calibrating the solar simulator electronic load box under transient conditions, and simultaneously calibrate current, voltage, and power measurement accuracy Degree, to achieve the calibration of the IV curve.
(二)技术方案(2) Technical solution
为达到上述目的，本发明提供了一种太阳模拟器电子负载箱在线校准装置，该装置包括光伏组件1、Y型三通连接器2、快速数据采集器3、霍尔闭环电流传感器4和计算机5，其中：In order to achieve the above object, the present invention provides a solar simulator electronic load box online calibration device, the device includes a photovoltaic module 1, a Y-shaped three-way connector 2, a fast data collector 3, a Hall closed-loop current sensor 4 and a computer 5, of which:
光伏组件1，由多个太阳电池片以阵列形式构成，正面面向太阳模拟器光源，为该太阳模拟器电子负载箱在线校准装置提供电压和电流信号源；The photovoltaic module 1 is composed of a plurality of solar cells in the form of an array, the front faces the solar simulator light source, and provides voltage and current signal sources for the online calibration device of the solar simulator electronic load box;
Y型三通连接器2，采用非屏蔽电缆构成，一端为双通道接口，另一端为单通道接口，将光伏组件1分别与快速数据采集器3和待校准的太阳模拟器电子负载箱6匹配对接；Y-shaped three-way connector 2, made of unshielded cables, one end is a dual-channel interface, the other end is a single-channel interface, and the photovoltaic module 1 is matched with the fast data collector 3 and the electronic load box 6 of the solar simulator to be calibrated respectively docking;
快速数据采集器3，包含多个数据采集端口，每个数据采集端口对应一个通道，检测时选用其中的任意两个通道，一个通道采集经霍尔闭环电流传感器I-V转换后所得电压信号，另一个通道采集光伏组件1输出电压信号，对采集的这两种信号进行AD转换，输出给计算机5；Fast data collector 3, including multiple data acquisition ports, each data acquisition port corresponds to a channel, any two channels are selected during detection, one channel collects the voltage signal obtained after the I-V conversion of the Hall closed-loop current sensor, and the other The channel collects the output voltage signal of the photovoltaic module 1, performs AD conversion on the two collected signals, and outputs it to the computer 5;
霍尔闭环电流传感器4，通过同轴电缆与快速数据采集器3匹配连接，对该太阳模拟器电子负载箱在线校准装置提供电流测试，对所采得的来自光伏组件1的电流信号进行I-V转换，转换后得到的电压信号通过同轴电缆输出给快速数据采集器3的某一个通道；The Hall closed-loop current sensor 4 is matched and connected with the fast data collector 3 through a coaxial cable, and provides current testing for the electronic load box online calibration device of the solar simulator, and performs I-V conversion on the collected current signal from the photovoltaic module 1 , the converted voltage signal is output to a certain channel of the fast data collector 3 through the coaxial cable;
计算机5，采用USB端口分别连接于快速数据采集器3和霍尔闭环电流传感器4，对接收自快速数据采集器3的信号以数据曲线进行显示，为霍尔闭环电流传感器4提供工作电源。The computer 5 is respectively connected to the fast data collector 3 and the Hall closed-loop current sensor 4 through a USB port, displays the signal received from the fast data collector 3 as a data curve, and provides working power for the Hall closed-loop current sensor 4 .
上述方案中，所述Y型三通连接器2中，双通道接口包括第一通道接口a和第二通道接口b，第一通道接口a与待校准的太阳模拟器电子负载箱6匹配对接，第二通道接口b通过同轴电缆与快速数据采集器3的某一通道匹配连接；单通道接口为第三通道接口c，与光伏组件1的引线接口匹配对接。In the above solution, in the Y-shaped three-way connector 2, the dual-channel interface includes a first channel interface a and a second channel interface b, and the first channel interface a is matched with the electronic load box 6 of the solar simulator to be calibrated. The second channel interface b is matched and connected with a channel of the fast data collector 3 through a coaxial cable; the single channel interface is the third channel interface c, which is matched with the lead interface of the photovoltaic module 1 .
上述方案中，所述快速数据采集器3在采集信号前经过标定。In the above solution, the fast data collector 3 is calibrated before collecting signals.
上述方案中，所述霍尔闭环电流传感器4的灵敏度KH经过标定，灵敏度KH等于输出电压与输入电流比。In the above solution, the sensitivity KH of the Hall closed-loop current sensor 4 has been calibrated, and the sensitivity KH is equal to the ratio of the output voltage to the input current.
上述方案中，所述霍尔闭环电流传感器4与快速数据采集器3之间采用同轴电缆连接，该同轴电缆的两端均有一接头。In the above solution, the Hall closed-loop current sensor 4 and the fast data collector 3 are connected by a coaxial cable, and both ends of the coaxial cable have a joint.
上述方案中，所述计算机5中的一个USB端口与霍尔闭环电流传感器4电源端口连接，为其提供工作电源。In the above scheme, a USB port in the computer 5 is connected to the power port of the Hall closed-loop current sensor 4 to provide working power for it.
上述方案中，所述计算机5中的一个USB端口与快速数据采集器3连接，对接收自快速数据采集器3的信号以数据曲线进行显示。In the above solution, a USB port in the computer 5 is connected to the fast data collector 3, and the signal received from the fast data collector 3 is displayed as a data curve.
上述方案中，该太阳模拟器电子负载箱在线校准装置检测所得信号是快速数据采集器3采集的信号，一个信号是经霍尔闭环电流传感器I-V转换后所得电压信号，另一个信号是光伏组件1输出的电压信号，这两个信号经快速数据采集器3进行AD转换后输出给计算机5，由计算机5显示数据曲线。In the above scheme, the signals detected by the solar simulator electronic load box online calibration device are the signals collected by the fast data collector 3, one signal is the voltage signal obtained after I-V conversion by the Hall closed-loop current sensor, and the other signal is the photovoltaic module 1 The output voltage signal, these two signals are output to the computer 5 after AD conversion by the fast data collector 3, and the data curve is displayed by the computer 5.
(三)有益效果(3) Beneficial effects
从上述技术方案可以看出，本发明具有以下有益效果：As can be seen from the foregoing technical solutions, the present invention has the following beneficial effects:
1、本发明提供的太阳模拟器电子负载箱在线校准装置，采用双通道或多通道信号采集，能够实现太阳模拟器电子负载箱电流、电压、功率测量准确度的同时校准，解决了瞬态条件下校准太阳模拟器电子负载箱的技术难点。1. The solar simulator electronic load box online calibration device provided by the present invention adopts dual-channel or multi-channel signal acquisition, which can realize simultaneous calibration of the solar simulator electronic load box current, voltage, and power measurement accuracy, and solves transient conditions The technical difficulties of calibrating the electronic load box of the solar simulator.
2、本发明提供的太阳模拟器电子负载箱在线校准装置，可实现太阳模拟器电子负载箱测量准确度的在线校准，极大地减小了校准周期，不影响太阳模拟器的实际应用，不影响光伏企业的实际应用。2. The solar simulator electronic load box online calibration device provided by the present invention can realize the online calibration of the measurement accuracy of the solar simulator electronic load box, which greatly reduces the calibration period, does not affect the actual application of the solar simulator, and does not affect Practical application of photovoltaic enterprises.
3、本发明提供的太阳模拟器电子负载箱在线校准装置，可实现太阳模拟器电子负载箱测量IV曲线的校准。3. The solar simulator electronic load box online calibration device provided by the present invention can realize the calibration of the IV curve measured by the solar simulator electronic load box.
4、本发明提供的太阳模拟器电子负载箱在线校准装置，基于瞬态模式下进行校准，与太阳模拟器电子负载箱实际应用条件一致。4. The solar simulator electronic load box online calibration device provided by the present invention is based on the calibration in the transient mode, which is consistent with the actual application conditions of the solar simulator electronic load box.
5、本发明提供的太阳模拟器电子负载箱在线校准装置，结构简单，便于携带和安装，能很好满足光伏企业和检测机构的现场检测和计量需求。5. The solar simulator electronic load box online calibration device provided by the present invention has a simple structure, is easy to carry and install, and can well meet the on-site detection and measurement needs of photovoltaic enterprises and testing institutions.
6、本发明提供的太阳模拟器电子负载箱在线校准装置，对瞬态和稳态太阳模拟器，包括组件测试仪、太阳电池片分选机等，均适用。6. The solar simulator electronic load box online calibration device provided by the present invention is applicable to transient and steady-state solar simulators, including component testers, solar cell sorters, etc.
附图说明Description of drawings
下面结合附图和实施例对本发明的结果和特征作进一步的详细描述，其中：Below in conjunction with accompanying drawing and embodiment result of the present invention and feature are described in further detail, wherein:
图1是依照本发明实施例的太阳模拟器电子负载箱在线校准装置的示意图。Fig. 1 is a schematic diagram of an online calibration device for a solar simulator electronic load box according to an embodiment of the present invention.
图2是利用图1所示太阳模拟器电子负载箱在线校准装置测得电流、电压、功率随时间的变化关系。Fig. 2 is the variation relationship of current, voltage and power with time measured by the online calibration device of the solar simulator electronic load box shown in Fig. 1.
图3是利用图1所示太阳模拟器电子负载箱在线校准装置测得校准IV曲线。Fig. 3 is the calibration IV curve measured by the online calibration device of the electronic load box of the solar simulator shown in Fig. 1 .
具体实施方式Detailed ways
为使本发明的目的、技术方案和优点更加清楚明白，以下结合具体实施例，并参照附图，对本发明进一步详细说明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
请参阅图1所示，图1是依照本发明实施例的太阳模拟器电子负载箱在线校准装置的示意图，用于在线校准太阳模拟器电子负载箱6的电流、电压、功率的测量准确度，该装置包括光伏组件1、Y型三通连接器2、快速数据采集器3、霍尔闭环电流传感器4和计算机5，其中：Please refer to shown in Fig. 1, Fig. 1 is the schematic diagram according to the solar simulator electronic load box online calibration device of the embodiment of the present invention, is used for the measurement accuracy of the electric current of the solar simulator electronic load box 6 on-line calibration, voltage, power, The device includes a photovoltaic module 1, a Y-shaped three-way connector 2, a fast data collector 3, a Hall closed-loop current sensor 4 and a computer 5, wherein:
光伏组件1，由多个太阳电池片以阵列形式构成，正面面向太阳模拟器光源，为该太阳模拟器电子负载箱在线校准装置提供电压和电流信号源；在实际应用中，可根据待测的电子负载箱6的测试量程来选取该光伏组件提供的电压值或电流值。Photovoltaic module 1 is composed of a plurality of solar cells in the form of an array, the front faces the solar simulator light source, and provides voltage and current signal sources for the online calibration device of the solar simulator electronic load box; The test range of the electronic load box 6 is used to select the voltage value or current value provided by the photovoltaic module.
Y型三通连接器2，采用非屏蔽电缆构成，一端为双通道接口，另一端为单通道接口，将光伏组件1分别与快速数据采集器3和待校准的太阳模拟器电子负载箱6匹配对接；其中，双通道接口包括第一通道接口a和第二通道接口b，第一通道接口a与待校准的太阳模拟器电子负载箱6匹配对接，第二通道接口b通过同轴电缆与快速数据采集器3的某一通道匹配连接；单通道接口为第三通道接口c，与光伏组件1的引线接口匹配对接。在实际应用中，该太阳模拟器电子负载箱在线校准装置中Y型三通连接器的个数可以为一个，也可以为多个，图1所示Y型三通连接器的个数为两个。Y-shaped three-way connector 2, made of unshielded cables, one end is a dual-channel interface, the other end is a single-channel interface, and the photovoltaic module 1 is matched with the fast data collector 3 and the electronic load box 6 of the solar simulator to be calibrated respectively Docking; wherein, the dual-channel interface includes a first channel interface a and a second channel interface b, the first channel interface a is matched with the solar simulator electronic load box 6 to be calibrated, and the second channel interface b is connected to the fast A certain channel of the data collector 3 is matched and connected; the single channel interface is the third channel interface c, which is matched with the lead interface of the photovoltaic module 1 . In practical applications, the number of Y-type three-way connectors in the solar simulator electronic load box online calibration device can be one or more, and the number of Y-type three-way connectors shown in Figure 1 is two indivual.
快速数据采集器3，该数据采集器在采集信号前经过标定，包含多个数据采集端口，每个数据采集端口对应一个通道，检测时选用其中的任意两个通道，一个通道采集经霍尔闭环电流传感器I-V转换后所得电压信号，另一个通道采集光伏组件1输出电压信号；该快速数据采集器3对采集的上述两种信号进行AD转换，输出给计算机5，由计算机5显示数据曲线。Fast data collector 3, the data collector has been calibrated before collecting signals, including multiple data collection ports, each data collection port corresponds to a channel, any two of the channels are selected for detection, and one channel is collected through the Hall closed loop The voltage signal obtained by the I-V conversion of the current sensor, and another channel collects the output voltage signal of the photovoltaic module 1; the fast data collector 3 performs AD conversion on the above two signals collected, and outputs it to the computer 5, which displays the data curve.
霍尔闭环电流传感器4，通过同轴电缆与快速数据采集器3匹配连接，对该太阳模拟器电子负载箱在线校准装置提供电流测试，对所采得的来自光伏组件1的电流信号进行I-V转换，转换后得到的电压信号通过同轴电缆输出给快速数据采集器3的某一通道。该霍尔闭环电流传感器的灵敏度KH经过标定，灵敏度KH等于输出电压与输入电流比。所述霍尔闭环电流传感器4与快速数据采集器3之间采用同轴电缆连接，该同轴电缆的两端均有一接头。The Hall closed-loop current sensor 4 is matched and connected with the fast data collector 3 through a coaxial cable, and provides current testing for the electronic load box online calibration device of the solar simulator, and performs I-V conversion on the collected current signal from the photovoltaic module 1 , the converted voltage signal is output to a certain channel of the fast data collector 3 through the coaxial cable. The sensitivity KH of the Hall closed-loop current sensor is calibrated, and the sensitivity KH is equal to the ratio of the output voltage to the input current. The Hall closed-loop current sensor 4 and the fast data collector 3 are connected by a coaxial cable, and both ends of the coaxial cable have a connector.
计算机5，采用USB端口分别连接于快速数据采集器3和霍尔闭环电流传感器4，其中一个USB端口与霍尔闭环电流传感器4电源端口连接，为其提供工作电源；一个USB端口与快速数据采集器3连接，对接收自快速数据采集器3的信号以数据曲线进行显示。The computer 5 is respectively connected to the fast data collector 3 and the Hall closed-loop current sensor 4 through USB ports, and one of the USB ports is connected to the power port of the Hall closed-loop current sensor 4 to provide working power for it; one USB port is connected to the fast data acquisition Connected to the device 3, the signal received from the fast data collector 3 is displayed as a data curve.
该太阳模拟器电子负载箱在线校准装置检测所得信号即快速数据采集器3采集的信号，一个信号是经霍尔闭环电流传感器I-V转换后所得电压信号，另一个信号是光伏组件1输出的电压信号，这两个信号经快速数据采集器3进行AD转换后输出给计算机5，由计算机5显示数据曲线。The signal detected by the solar simulator electronic load box online calibration device is the signal collected by the fast data collector 3, one signal is the voltage signal obtained after I-V conversion by the Hall closed-loop current sensor, and the other signal is the voltage signal output by the photovoltaic module 1 , the two signals are output to the computer 5 after AD conversion by the fast data collector 3, and the data curve is displayed by the computer 5.
在检测的准备过程中，根据太阳模拟器电子负载箱校准量程，选择合适的光伏组件作为太阳模拟器电子负载箱及计量装置的电流和电压信号源，待其温度稳定后，将其置于测试面内，正面正对太阳模拟器光源。记录霍尔闭环电流传感器输出零点电压值V0。将Y型三通连接器的其中一根穿过霍尔闭环电流传感器穿孔穿芯圆孔，用于该太阳模拟器电子负载箱在线校准装置电流信号的测量。In the preparation process of the test, according to the calibration range of the electronic load box of the solar simulator, select a suitable photovoltaic module as the current and voltage signal source of the electronic load box of the solar simulator and the metering device, and place it in the test after its temperature is stable. In-plane, facing directly to the solar simulator light source. Record the zero-point voltage V0 output by the Hall closed-loop current sensor. Pass one of the Y-shaped three-way connectors through the core hole of the Hall closed-loop current sensor to measure the current signal of the online calibration device of the electronic load box of the solar simulator.
对光伏组件1进行辐照，利用太阳模拟器电子负载箱测量其IV特性，包括电压、电流随时间的变化曲线，同时利用快速数据采集器3取样信号输出，测得光伏组件1输出电压V和霍尔电流传感器副边输出电压V1随时间的变化曲线。将公式电流I＝(V1-V0)/KH和功率P＝V·I内嵌入快速数据采集器3软件处理程序，进行运算并输出相应结果。得到光伏组件1输出电流(霍尔电流传感器原边输入电流)I、输出电压V、输出功率P随采样时间的变化曲线。取样同一时间点处太阳模拟器电子负载箱测量电流、电压、功率与该太阳模拟器电子负载箱在线校准装置电流、电压、功率测量值进行比较，得到此量程下的校准结果。通过取样不同时间点(对应不同电流、电压、功率量程)，实现太阳模拟器电子负载箱测量电流、电压、功率准确度的多量程校准。Irradiate the photovoltaic module 1, use the solar simulator electronic load box to measure its IV characteristics, including the change curve of voltage and current with time, and use the fast data collector 3 to sample the signal output, and measure the output voltage V and The change curve of the secondary output voltage V1 of the Hall current sensor with time. Embed the formulas current I=(V1-V0)/KH and power P=V·I into the software processing program of the fast data collector 3, perform calculations and output corresponding results. Obtain the variation curve of the output current of the photovoltaic module 1 (the input current of the primary side of the Hall current sensor) I, the output voltage V, and the output power P with the sampling time. Sampling the current, voltage, and power measured by the electronic load box of the solar simulator at the same time point are compared with the current, voltage, and power measurement values of the online calibration device of the electronic load box of the solar simulator, and the calibration results under this range are obtained. By sampling different time points (corresponding to different current, voltage, and power ranges), the multi-range calibration of the accuracy of current, voltage, and power measured by the electronic load box of the solar simulator is realized.
考虑实际应用的情况，开路电压(Voc)(输出电流为0时的电压值)、短路电流(Isc)(输出电压为0时的电流值)、最大输出功率(Pm)及其对应的电压值(Vm)、电流值(Im)是评价光伏组件性能最为关键的光电参量，故一般太阳模拟器电子负载箱测量准确度的校准只针对以上5个参数。优选地，重复进行5次测试，取平均值作为最终校准结果。Considering the actual application situation, the open circuit voltage (Voc) (the voltage value when the output current is 0), the short circuit current (Isc) (the current value when the output voltage is 0), the maximum output power (Pm) and its corresponding voltage value (Vm) and current value (Im) are the most critical photoelectric parameters to evaluate the performance of photovoltaic modules, so the calibration of the measurement accuracy of the electronic load box of the general solar simulator is only for the above five parameters. Preferably, the test is repeated 5 times, and the average value is taken as the final calibration result.
测试实例test case
如下是采用本发明提供的太阳模拟器电子负载箱在线校准装置，对某光伏企业生产测试所用的瞬态太阳模拟器电子负载箱电压、电流、功率测量准确度进行校准。The following is the use of the solar simulator electronic load box online calibration device provided by the present invention to calibrate the measurement accuracy of the transient solar simulator electronic load box voltage, current, and power used in the production test of a photovoltaic enterprise.
通过标定得到霍尔电流传感器灵敏度KH＝0.200175V/A。用快速数据采集器测量霍尔闭环电流传感器零点电压V0＝2.507V。选取标称功率Pm＝230W，短路电流Isc＝8.4A，开路电压Voc＝37.0V的单晶硅光伏组件作为电压、电流信号源，待其与周围环境热交换温度稳定后，将其置于测试面内，正面面对模拟器光源。依照附图1连接各接口引线，触发太阳模拟器脉冲闪光，利用太阳模拟器电子负载箱及该太阳模拟器电子负载箱在线校准装置同时采集光伏组件输出IV特性。记录太阳模拟器电子负载箱测得开路电压Vocm、短路电流Iscm、最大输出功率Pmm及其对应的电压值Vmm、电流值Imm。利用快速数据采集器3取样信号输出，测得光伏组件输出电压Vc和霍尔电流传感器副边输出电压V1随时间的变化曲线。将公式电流Ic＝(V1-V0)/KH和功率Pc＝Vc·Ic内嵌入快速数据采集器3软件处理程序，进行运算并输出相应结果，得到光伏组件输出电流Ic、输出电压Vc、输出功率Pc随采样时间的变化曲线，如附图2所示。以Vc为横坐标，各相同时间点对应的Ic、Pc为纵坐标作图，得到所校准IV特性曲线，如附图3所示。取Vc＝0时对应的Ic为短路电流校准值Iscc，取Ic＝0时对应的Vc为开路电压校准值Vocc，取Pc的最大值为最大功率校准值Pmc，对应的电压、电流分别为Vmc、Imc。The Hall current sensor sensitivity KH=0.200175V/A is obtained through calibration. Measure the zero-point voltage V0 of the Hall closed-loop current sensor with a fast data collector = 2.507V. Select a monocrystalline silicon photovoltaic module with nominal power Pm=230W, short-circuit current Isc=8.4A, and open-circuit voltage Voc=37.0V as the voltage and current signal source. After the heat exchange temperature between it and the surrounding environment is stable, it is placed in the test In-plane, the front faces the simulator light source. Connect the lead wires of each interface according to Figure 1, trigger the pulse flash of the solar simulator, and use the electronic load box of the solar simulator and the online calibration device of the electronic load box of the solar simulator to simultaneously collect the output IV characteristics of the photovoltaic module. Record the open circuit voltage Vocm, short circuit current Iscm, maximum output power Pmm and their corresponding voltage value Vmm and current value Imm measured by the electronic load box of the solar simulator. The fast data collector 3 is used to sample the signal output, and the time-varying curves of the output voltage Vc of the photovoltaic module and the output voltage V1 of the secondary side of the Hall current sensor are measured. Embed the formula current Ic=(V1-V0)/KH and power Pc=Vc·Ic into the fast data collector 3 software processing program, perform calculations and output corresponding results, and obtain the output current Ic, output voltage Vc, and output power of photovoltaic modules The variation curve of Pc with sampling time is shown in Figure 2. Take Vc as the abscissa, and Ic and Pc corresponding to the same time points as the ordinate to draw a graph to obtain the calibrated IV characteristic curve, as shown in Figure 3. Take the corresponding Ic when Vc=0 is the short-circuit current calibration value Iscc, take the corresponding Vc when Ic=0 is the open-circuit voltage calibration value Vocc, take the maximum value of Pc as the maximum power calibration value Pmc, and the corresponding voltage and current are respectively Vmc , Imc.
重复以上测试过程5次，分别计算Vocm、Iscm、Pmm、Imm、Vmm、Vocc、Iscc、Pmc、Imc、Vmc的平均值，进而得到开路电压修正因子(Vocc/Vocm)、短路电流修正因子(Iscc/Iscm)、最大功率修正因子(Pmc/Pmm)、最大功率对应电流修正因子(Imc/Imm)、最大功率对应电压修正因子(Vmc/Vmm)的校准结果，如表1所示，表1是利用图1所示太阳模拟器电子负载箱在线校准装置校准太阳模拟器电子负载箱测量准确度的校准结果。Repeat the above test process 5 times, respectively calculate the average value of Vocm, Iscm, Pmm, Imm, Vmm, Vocc, Iscc, Pmc, Imc, Vmc, and then get the open circuit voltage correction factor (Vocc/Vocm), short circuit current correction factor (Iscc /Iscm), the maximum power correction factor (Pmc/Pmm), the maximum power corresponding to the current correction factor (Imc/Imm), the maximum power corresponding to the voltage correction factor (Vmc/Vmm), as shown in Table 1, Table 1 is Use the solar simulator electronic load box online calibration device shown in Figure 1 to calibrate the calibration results of the measurement accuracy of the solar simulator electronic load box.
表1Table 1
以上所述的具体实施例，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施例而已，并不用于限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.
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| CN110868156A (en) * | 2019-12-20 | 2020-03-06 | 青海黄河上游水电开发有限责任公司光伏产业技术分公司 | Method for measuring power of high-efficiency solar module in sections |
| CN115373321A (en) * | 2022-09-14 | 2022-11-22 | 中国人民解放军96963部队 | Multi-path star simulator calibrating device |
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| CN107219800A (en) * | 2017-06-30 | 2017-09-29 | 安徽大恒能源科技有限公司 | A kind of photovoltaic module monitoring product automatic configuration system and method |
| CN110868156A (en) * | 2019-12-20 | 2020-03-06 | 青海黄河上游水电开发有限责任公司光伏产业技术分公司 | Method for measuring power of high-efficiency solar module in sections |
| CN115373321A (en) * | 2022-09-14 | 2022-11-22 | 中国人民解放军96963部队 | Multi-path star simulator calibrating device |
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