CN108418548A - Photovoltaic panel omnibearing integrated monitors system - Google Patents

Abstract

The invention discloses an all-round integrated monitoring system for photovoltaic panels. The specific steps are: monitor the power generation power of photovoltaic power generation components; use cleaning robots, temperature sensors, and laser sensors to monitor the cleanliness of photovoltaic panels and clean them in time; The photovoltaic panel operation and maintenance platform receives the data transmitted by the sensor for unified processing. The method disclosed in the present invention uses the laser reflection principle to detect the cleanliness of the photovoltaic panel, and simultaneously detects the temperature distribution of the photovoltaic panel based on the temperature sensor array and the cleaning robot. Through the connection of the wireless network, the operation and maintenance platform is integrated with the monitoring site. On this basis, the analysis report of the historical data of photovoltaic power generation and the benefit evaluation of operation and maintenance measures such as cleaning robots are realized.

Description

Photovoltaic panel all-round integrated monitoring system

technical field

The invention belongs to the technical field of photovoltaic power generation, and in particular relates to the monitoring and maintenance technology of photovoltaic panels of power generation components in photovoltaic power stations, and in particular to an all-round integrated monitoring system for photovoltaic panels.

Background technique

In order to alleviate the shortage of energy resources and the impact of climate change, countries around the world are gradually increasing the development and investment in the field of renewable energy. Due to its universality of resources, safety, reliability and noise-free characteristics, photovoltaic power generation has become a renewable energy that countries are competing to develop after wind power. Renewable energy power generation plays an important role in the long-term energy strategy. As of the end of 2016, the cumulative installed capacity of photovoltaic power generation in my country shows that my country's installed capacity is nearly 70GW. In the next ten years, China's photovoltaic power generation market will shift from independent power generation systems to grid-connected power generation systems, including desert power stations and urban rooftops. Power system. Thanks to the support of the national strategy, China's solar photovoltaic power generation will usher in a new round of rapid growth.

Photovoltaic power stations are generally installed in the wilderness, or on the roof, where the natural environment is harsh. During operation, due to sandstorms, snowstorms, shadows, debris, dirt, bird droppings, panel aging, inconsistent panel sizes, cloud cover, or other factors, the efficiency of solar modules will decline to varying degrees, and the efficiency of a single module will decrease Or damage will bring about a significant drop in the overall efficiency of the system. The above factors will cause failures such as hot spots, cracks, and aging of photovoltaic panels to varying degrees. The occurrence of faults will further lead to a decrease in power generation, and may cause permanent damage to photovoltaic panels if not dealt with in time. Therefore, comprehensive monitoring of photovoltaic panels is required.

The traditional method judges whether there is a fault in the photovoltaic panel through the change of the power generation, but this method cannot locate the fault location, and requires a hand-held device to check one by one. For a photovoltaic power station with a huge area, the workload is too large, and the efficiency is too low to cause a fault. cannot be processed in a timely manner.

Contents of the invention

In view of the above-mentioned defects of the prior art, the object of the present invention is to provide an all-round integrated monitoring system for photovoltaic panels. The platform realizes the cleanliness detection, fault detection, power generation monitoring and automatic cleaning of photovoltaic panels of photovoltaic power plants.

In order to achieve the above purpose, the present invention provides an all-round integrated monitoring system for photovoltaic panels. The workflow design of the system includes the following steps:

Step 1. Monitor the generated power through the current and voltage monitoring technology of the combiner box;

Step 2. Carry out all-round monitoring and cleaning of photovoltaic panels through cleaning robots and multi-sensors;

Step 3. Connect the operation and maintenance platform with each monitoring sensor and cleaning robot through wireless communication;

Step 4. Receive the data transmitted by the sensor and process it uniformly.

Further, the specific process of monitoring the generated power through the current and voltage monitoring technology of the combiner box described in step 1 is as follows:

The monitoring information is transmitted to the data acquisition and processing unit by the Hall sensor;

The data collection processing unit includes a high-bit ADC module, a processor and a memory;

Each combiner box is a wireless node, and the detected data is uploaded to the system server uniformly;

The monitored data is collected by the data processing unit for processing;

The data is collected when the processing unit is connected to the ZigBee wireless communication module.

Further, the specific process of monitoring and cleaning all-round photovoltaic panels through cleaning robots and multi-sensors as described in step 2 is as follows:

According to Kirchhoff's voltage law, the location of fault points such as hot spots can be judged by monitoring the temperature of the photovoltaic panel;

The operation and maintenance platform summarizes the temperature information and the corresponding location information to draw the temperature distribution map of the photovoltaic panel, and further infers the location of the hot spot failure;

Use sensors including laser emission, receiving part and data processing part to detect the cleanliness of photovoltaic panels to detect the cleanliness of photovoltaic panels;

A cleaning robot is used to clean the location of the hot spot failure and the unclean place in the detection of the cleanliness of the photovoltaic panel by the sensor.

Further, the specific process of receiving the data transmitted by the sensor in step 4 and performing unified processing is as follows: the operation and maintenance platform is integrated with the monitoring site, and the analysis report of the historical data of photovoltaic power generation and the operation and maintenance of cleaning robots are realized. Evaluation of the effectiveness of the measures.

The invention provides builders of wind farms with an all-round integrated monitoring system for photovoltaic panels. The system can effectively infer the location of hot spot faults. Through the connection of the wireless network, the operation and maintenance platform is integrated with the monitoring site, and the system realizes the monitoring of photovoltaic panels. All aspects of photovoltaic panels in power stations are integrated monitoring, operation and maintenance.

1) A detection method for the cleanliness of photovoltaic panels using the principle of laser reflection;

2) Photovoltaic panel temperature distribution detection based on temperature sensor array and cleaning robot;

3) Photovoltaic panel operation and maintenance platform. Through the wireless network connection, the operation and maintenance platform is integrated with the monitoring site. On this basis, the analysis report of the historical data of photovoltaic power generation and the benefit evaluation of operation and maintenance measures such as cleaning robots are realized.

Description of drawings

Figure 1 is a schematic diagram of the workflow of the all-round integrated monitoring system for photovoltaic panels;

Figure 2 is a schematic diagram of the current and voltage monitoring process;

Fig. 3 is a schematic diagram of cleaning robot and multi-sensor detection structure;

4 is a schematic diagram of a hot spot detection process of a temperature sensor array;

Fig. 5 is a schematic diagram of the cleanliness fitting function.

Detailed ways

The preferred embodiments of the present invention are described in detail below, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

An all-round integrated monitoring system for photovoltaic panels can realize cleanliness detection, fault detection, power generation monitoring and automatic cleaning of photovoltaic panels in photovoltaic power stations.

Its workflow is shown in Figure 1, specifically including the following steps:

Step 1. Monitor the generated power through the current and voltage monitoring technology of the combiner box;

Step 2. Carry out all-round monitoring and cleaning of photovoltaic panels through cleaning robots and multi-sensors;

Step 3. Connect the operation and maintenance platform with each monitoring sensor and cleaning robot through wireless communication;

Step 4. Receive the data transmitted by the sensor and process it uniformly.

Further, the specific process of monitoring the generated power through the current and voltage monitoring technology of the combiner box described in step 1 is as follows:

The monitoring information is transmitted to the data acquisition and processing unit by the Hall sensor;

The data collection processing unit includes a high-bit ADC module, a processor and a memory;

Each combiner box is a wireless node, and the detected data is uploaded to the system server uniformly;

The monitored data is collected by the data processing unit for processing;

The data is collected when the processing unit is connected to the ZigBee wireless communication module.

Further, the specific process of monitoring and cleaning all-round photovoltaic panels through cleaning robots and multi-sensors as described in step 2 is as follows:

According to Kirchhoff's voltage law, the location of fault points such as hot spots can be judged by monitoring the temperature of the photovoltaic panel;

The operation and maintenance platform summarizes the temperature information and the corresponding location information to draw the temperature distribution map of the photovoltaic panel, and further infers the location of the hot spot failure;

Use sensors including laser emission, receiving part and data processing part to detect the cleanliness of photovoltaic panels to detect the cleanliness of photovoltaic panels;

A cleaning robot is used to clean the location of the hot spot failure and the unclean place in the detection of the cleanliness of the photovoltaic panel by the sensor.

Further, the specific process of receiving the data transmitted by the sensor in step 4 and performing unified processing is as follows: the operation and maintenance platform is integrated with the monitoring site, and the analysis report of the historical data of photovoltaic power generation and the operation and maintenance of cleaning robots are realized. Evaluation of the effectiveness of the measures.

The methods disclosed in the above embodiments provide builders of wind farms with an all-round integrated monitoring system for photovoltaic panels. This system can effectively infer the location of hot spot faults, and connect the operation and maintenance platform with the monitoring site through a wireless network connection. , the system realizes the all-in-one monitoring, operation and maintenance of photovoltaic panels in photovoltaic power stations.

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (4)

1. An all-round integrated monitoring system for photovoltaic panels, which realizes cleanliness detection, fault detection, power generation monitoring and automatic cleaning of photovoltaic panels in photovoltaic power stations. The technical solution of the monitoring system includes the following contents: Step 1. Monitor the generated power through the current and voltage monitoring technology of the combiner box; Step 2. Carry out all-round monitoring and cleaning of photovoltaic panels through cleaning robots and multi-sensors; Step 3. Connect the operation and maintenance platform with each monitoring sensor and cleaning robot through wireless communication; Step 4. Receive the data transmitted by the sensor and process it uniformly. 2. The all-round integrated monitoring system for photovoltaic panels as claimed in claim 1, characterized in that, the specific process of monitoring the power generation through the current and voltage monitoring technology of the combiner box described in step 1 is as follows: The monitoring information is transmitted to the data acquisition and processing unit by the Hall sensor; The data collection processing unit includes a high-bit ADC module, a processor and a memory; Each combiner box is a wireless node, and the detected data is uploaded to the system server uniformly; The monitored data is collected by the data processing unit for processing; The data is collected when the processing unit is connected to the ZigBee wireless communication module. 3. The photovoltaic panel all-round integrated monitoring system as claimed in claim 1, characterized in that, the specific process of carrying out omnidirectional photovoltaic panel monitoring and cleaning through the cleaning robot and multiple sensors in the step 2 is as follows: According to Kirchhoff's voltage law, the location of fault points such as hot spots can be judged by monitoring the temperature of the photovoltaic panel; The operation and maintenance platform summarizes the temperature information and the corresponding location information to draw the temperature distribution map of the photovoltaic panel, and further infers the location of the hot spot failure; Use sensors including laser emission, receiving part and data processing part to detect the cleanliness of photovoltaic panels to detect the cleanliness of photovoltaic panels; A cleaning robot is used to clean the location of the hot spot failure and the unclean place in the detection of the cleanliness of the photovoltaic panel by the sensor. 4. The all-round integrated monitoring system for photovoltaic panels as claimed in claim 1, characterized in that, the specific process of receiving the data transmitted by the sensor in the step 4 and performing unified processing is as follows: make the operation and maintenance platform and the monitoring site The integrated connection realizes the analysis report of the historical data of photovoltaic power generation and the benefit evaluation of operation and maintenance measures such as cleaning robots.