Photovoltaic module monitoring system and method based on DSP
阅读说明：本技术 一种基于dsp的光伏组件监测系统及方法 (Photovoltaic module monitoring system and method based on DSP ) 是由 朱洋艳 王致杰 赵英杰 王鸿 王宇鹏 王帅 付晓琳 王龙 于 2019-03-27 设计创作，主要内容包括：本发明涉及一种基于DSP的光伏组件监测系统及方法,包括用于作为监测主控的DSP芯片,所述DSP芯片还与用于作为辅助控制的外围电路相连接,其还依次通过电源模块、通讯模块与上位机相连接,所述DSP芯片还通过数模转换模块分别与用于收集检测信号数据的电压传感器、电流传感器、温度传感器和光照强度传感器相连接,此外,该系统的监测方法,包括以下步骤：步骤1：初始化整体DSP系统及各模块部分并配置数模模块；步骤2：通过中断运行以调用各功能子模块实现对光伏组件的监测与数据运输；步骤3：根据各子模块的监测数据处理后建立最优运行模型并得出针对光伏组件的监控控制结果以实现健康运行。与现有技术相比,本发明具有修改调试简便等优点。(The invention relates to a photovoltaic module monitoring system and method based on DSP, comprising a DSP chip used as a monitoring main control, wherein the DSP chip is also connected with a peripheral circuit used as an auxiliary control and is also connected with an upper computer through a power module and a communication module in sequence, and the DSP chip is also connected with a voltage sensor, a current sensor, a temperature sensor and an illumination intensity sensor which are used for collecting detection signal data through a digital-to-analog conversion module respectively, in addition, the monitoring method of the system comprises the following steps: step 1: initializing the whole DSP system and each module part and configuring a digital-analog module; step 2: monitoring and data transportation of the photovoltaic module are realized by calling each functional sub-module through interrupted operation; and step 3: and establishing an optimal operation model after processing the monitoring data of each sub-module and obtaining a monitoring control result aiming at the photovoltaic module so as to realize healthy operation. Compared with the prior art, the invention has the advantages of simple and convenient modification and debugging and the like.)
1. The utility model provides a photovoltaic module monitoring system based on DSP which characterized in that, is including being used for as the DSP chip of monitoring master control, the DSP chip still is connected with the peripheral circuit that is used for as auxiliary control, and it still loops through power module, communication module and is connected with the host computer, the DSP chip still is connected with voltage sensor, current sensor, temperature sensor and the illumination intensity sensor that is used for collecting the detection signal data through digital-to-analog conversion module respectively.
2. The DSP-based photovoltaic module monitoring system according to claim 1, wherein the DSP chip is of type TM320F 2812.
3. The DSP-based photovoltaic module monitoring system according to claim 1, wherein the voltage sensor, the current sensor, the temperature sensor and the illumination intensity sensor are integrated into a signal acquisition module chip.
4. The DSP-based photovoltaic module monitoring system of claim 3, wherein the signal acquisition module chip is model AD 7656.
5. A monitoring method adopting the DSP-based photovoltaic module monitoring system as claimed in any one of claims 1 to 4, characterized by comprising the following steps:
step 1: initializing the whole DSP system and each module part and configuring a digital-analog module;
step 2: monitoring and data transportation of the photovoltaic module are realized by calling each functional sub-module through interrupted operation;
and step 3: and establishing an optimal operation model after processing the monitoring data of each sub-module and obtaining a monitoring control result aiming at the photovoltaic module so as to realize healthy operation.
6. The method for detecting the photovoltaic module monitoring system based on the DSP as claimed in claim 5, wherein the step 2 of interrupting the operation comprises: and after receiving the response of the server, the ZigBee host machine judges whether the response of the server is received, and after receiving the response of the server, the ZigBee host machine performs data transmission and interrupts the return.
7. The detection method of the photovoltaic module monitoring system based on the DSP as claimed in claim 6, wherein the step 2 of interrupting the operation further comprises the step of returning to judge whether the response of the server is received after the photovoltaic module field protection and data acquisition is performed when the ZigBee host does not receive the response of the server, and storing the data to the SD card when the response of the server is not received.
8. The detection method of the photovoltaic module monitoring system based on the DSP as claimed in claim 7, wherein the step 2 of interrupting the operation further comprises storing the data to the SD card when the response of the server is not directly received after the photovoltaic module is protected on site and data is collected.
Technical Field
The invention relates to the technical field of photovoltaic power generation monitoring, in particular to a photovoltaic module monitoring system and method based on a DSP.
Background
The operation of photovoltaic power generation system takes place under unmanned on duty's the condition generally now, maintain and also adopt the manpower to patrol and examine the mode mostly, the piece by piece is looked over photovoltaic module's electrical parameter and is judged whether the subassembly state is normal, to very dispersed photovoltaic system subaerial, photovoltaic module equips in eminence or outdoor adverse circumstances more usually, the work of monitoring maintenance and washing is very difficult loaded down with trivial details, the manual maintenance mode is time-consuming and ageing poor, need consume a lot of unnecessary time and manpower and materials, can not satisfy the requirement that the quick real-time maintenance of system overhauld and in time wash the photovoltaic module that the generating efficiency that arouses by the chance descends.
Therefore, building a monitoring system is an important part which needs to be processed urgently in the remote operation state online monitoring of the photovoltaic module. The power generation efficiency of the component is greatly influenced by environmental factors, and the accurate detection of the system is influenced. The existing monitoring system is poor in accuracy of collected photovoltaic data and low in utilization rate. The hot spot monitoring accuracy rate for the component is low, no effective preventive measure is provided for photovoltaic equipment faults, and a prediction model specially oriented to photovoltaic faults is lacked; most of the abnormal and fault conditions monitored by the system are inconsistent with the actual state of the equipment.
Disclosure of Invention
The invention aims to realize the operation monitoring of a photovoltaic module, calculate the part with low generating efficiency according to the collected data, perform partition processing on a large-area photovoltaic module, quickly and accurately realize the fault diagnosis of the hot spot of the photovoltaic module, and provide a photovoltaic module monitoring system and a method based on DSP (digital signal processor), wherein the data collected by the photovoltaic module monitoring system based on DSP is used as model input, a neural network intelligent algorithm is supposed to be adopted to solve the model to obtain a diagnosis result, and the hot spot fault diagnosis of the photovoltaic module is realized. And a photovoltaic module monitoring system based on the DSP is established, so that the monitoring and reliable transmission of the operating parameters of the photovoltaic module are realized.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a photovoltaic module monitoring system based on DSP, is including being used for as the DSP chip of monitoring master control, the DSP chip still is connected with the peripheral circuit that is used for as auxiliary control, and it still loops through power module, communication module and is connected with the host computer, the DSP chip still is connected with voltage sensor, current sensor, temperature sensor and the illumination intensity sensor that is used for collecting the detected signal data respectively through digital-to-analog conversion module.
Furthermore, the model of the DSP chip is TM320F 2812.
Furthermore, the voltage sensor, the current sensor, the temperature sensor and the illumination intensity sensor are integrated in the signal acquisition module chip.
Further, the model of the signal acquisition module chip is AD 7656.
The invention also provides a monitoring method adopting the photovoltaic module monitoring system based on the DSP, which comprises the following steps:
step 1: initializing the whole DSP system and each module part and configuring a digital-analog module;
step 2: monitoring and data transportation of the photovoltaic module are realized by calling each functional sub-module through interrupted operation;
and step 3: and establishing an optimal operation model after processing the monitoring data of each sub-module and obtaining a monitoring control result aiming at the photovoltaic module so as to realize healthy operation.
Preferably, the interrupting operation in
Preferably, the
Preferably, the operation interruption in
Compared with the prior art, the invention has the following advantages:
(1) the photovoltaic monitoring system based on the DSP has simple modification and easy debugging, the accuracy of monitoring data is improved by considering the partition management, the DSP can call functional sub-modules to realize pre-functions, and the modules can be realized in an interruption mode. The whole system analyzes hot spot faults on the basis of data acquisition and monitoring of the photovoltaic module, and has great significance for management of the photovoltaic module.
(2) The photovoltaic module has strong expansibility, and the DSP is used as the main control, so that the photovoltaic module has strong adaptability and expansibility, and a user can flexibly change the setting according to the actual condition of the photovoltaic module to match the working condition.
Drawings
FIG. 1 is a system architecture diagram of the present invention;
FIG. 2 is a schematic view of the interrupt operation flow of the present invention;
FIG. 3 is a flow chart of a monitoring method according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.
The general principle of the invention is as follows:
acquiring corresponding meteorological data such as output voltage, current and power of a photoelectric assembly, ambient temperature, solar irradiation and the like through an existing acquisition system of a photovoltaic power station, and achieving the purpose of on-line monitoring based on data; and then, a simple and effective electrical measurement method is adopted to draw an I-V curve of the photovoltaic module, the difference between a measured value and a theoretical curve is compared, the output efficiency of the photovoltaic module is analyzed, a partition management strategy is adopted, monitoring upgrading of accuracy improvement of the photovoltaic module is completed according to real-time monitoring after data partitioning, meanwhile, hot spot analysis caused by shielding is completed by utilizing a neural network algorithm, hot spot identification and early warning can be realized, the design of a monitoring system is completed, and therefore the purpose of improving the power generation efficiency of the photovoltaic module is achieved.
According to the invention, through the existing acquisition system of the photovoltaic power station, the corresponding meteorological data such as the output voltage, the current and the power of the photoelectric assembly, the ambient temperature, the solar irradiation and the like are acquired, and the purpose of on-line monitoring based on the data is achieved; further drawing an I-V curve of the photovoltaic module by adopting a simple and effective electrical measurement method, comparing the difference between a measured value and a theoretical curve, completing the analysis of the output efficiency of the photovoltaic module, and adopting a partition management strategy; monitoring upgrading of accuracy improvement of the photovoltaic module is completed according to real-time monitoring after data partitioning, meanwhile, hot spot analysis caused by shielding is completed by utilizing a neural network algorithm, hot spot identification and early warning can be achieved, and design of a monitoring system is completed.
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