CN104300899A - A photovoltaic power generation anti-theft system - Google Patents

Abstract

An anti-stealing system for photovoltaic power generation. It includes measurement subsystem, wireless communication subsystem, operating state judgment subsystem and human-computer interaction subsystem; wherein: the measurement subsystem is connected with the wireless communication subsystem operating state judgment subsystem through the wireless communication subsystem, and the operating state judgment subsystem The system is respectively connected with the human-computer interaction subsystem and the power generation metering device. The anti-stealing system for photovoltaic power generation provided by the present invention can monitor photovoltaic power generation devices in real time, prevent cheating in the measurement of photovoltaic power generation, and then defraud power generation subsidies.

Description

A photovoltaic power generation anti-theft system

technical field

The invention belongs to the technical field of photovoltaic power generation control, in particular to a photovoltaic power generation anti-stealing system.

Background technique

On November 1, 2012, the State Grid opened the acceptance of photovoltaic grid connection. According to the State Grid's "Opinions on Doing a Good Job of Distributed Photovoltaic Power Generation Grid-connected Services", the grid-connected process takes about 45 working days. When grid-connected distributed photovoltaic projects are connected to the grid for power generation, the State Grid needs to pay for the acquisition of distributed photovoltaic power at the same time. However, the difference between the price of photovoltaic power generation and the electricity price of conventional thermal power grid needs to be subsidized by the state, and this subsidy policy will be introduced soon. At present, the National Energy Administration is studying and formulating photovoltaic industry development issues and supporting policies, including "Guiding Opinions on Promoting the Development of my country's Photovoltaic Industry", "Implementation Measures for Distributed Photovoltaic Power Generation Demonstration Areas and Electricity Price Subsidy Standards", etc. Among them, the photovoltaic electricity price subsidy policy is directly related to the national grid photovoltaic grid connection. The main content of the distributed photovoltaic electricity price subsidy includes: All distributed photovoltaic power generation projects, including self-consumption and surplus power grid-connected parts, may receive a subsidy of 0.4-0.6 yuan/kwh. The implementation measures for the distributed photovoltaic power generation demonstration area and the electricity price subsidy standard are being drafted. The demonstration area project will implement a fixed electricity price, and the subsidy amount will be calculated based on the actual power generation.

In addition, the National Energy Administration issued the "Notice on Applying for the Large-scale Application Demonstration Area of Distributed Photovoltaic Power Generation" in September. The "Notice" proposes that the state implements a quota subsidy policy for unit electricity for photovoltaic power generation projects in demonstration areas, and the state implements a unified subsidy standard for self-generated electricity and excess on-grid electricity. According to the "Notice", the energy authorities of each province (autonomous region, city) shall submit the implementation plan of the distributed photovoltaic power generation demonstration area before October 15. Power grid enterprises will implement corresponding grid access and grid-connected services in accordance with the implementation plan of the demonstration area finally approved by the National Energy Administration.

If the electricity subsidy policy is determined, there will inevitably be some units and individuals taking advantage of the control of the policy to defraud the subsidy by using the electricity that was not originally generated by the photovoltaic system as the electricity generated by the photovoltaic system. How to plug this loophole through technical means becomes apparent. It is imminent.

At present, photovoltaic power generation metering mainly adopts the original anti-stealing technical means, such as lead seals, to prevent man-made damage to metering meters, but it cannot prevent cheating methods of injecting power through inverter means.

Therefore, a new technical solution is needed, which can monitor photovoltaic power generation, prevent photovoltaic power generation measurement cheating, and then defraud power generation subsidies.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide a photovoltaic power generation anti-stealing system.

In order to achieve the above purpose, the photovoltaic power generation anti-stealing system provided by the present invention includes: a measurement subsystem, a wireless communication subsystem, an operating state judgment subsystem and a human-computer interaction subsystem; wherein: the measurement subsystem communicates with the wireless communication subsystem through the wireless communication subsystem The communication subsystem is connected to the operating state judging subsystem, and the operating state judging subsystem is connected to the human-computer interaction subsystem and the power generation metering device respectively.

The measurement subsystem includes a plurality of irradiance sensors, and the irradiance sensors are used to measure the relative light irradiance of the photovoltaic panel installation site, and the irradiance sensors can measure the light irradiance of the surface of the photovoltaic panel in real time, each The system can be configured with 4-10 light irradiance sensors according to the installation conditions of the photovoltaic panels. Multiple irradiance sensors will upload the digitized light irradiance values to the operating status judgment subsystem through the wireless communication subsystem.

The wireless communication subsystem is composed of a plurality of wireless sending modules connected with each irradiance sensor and a wireless receiving module connected with the operating state judgment subsystem; since the light irradiance sensors are installed scattered and far away, equipment and sensors The communication among them adopts the wireless communication mode to form a network; the wireless communication adopts zigbee.

The described running status judging subsystem is mainly made up of three data processing sub-modules: comprising a data processing module, a self-learning module and an analysis processing module, wherein, the data processing module and the wireless sending module and the self-learning module in the wireless communication subsystem It is used to measure the real-time data of light irradiance sent by the subsystem and process the data for use by the self-learning module and the analysis and processing module; Receive the light irradiance data processed by the data processing module and read the real-time data of power generation in the power generation metering device, then record the historical data including light irradiance and power generation power, and compare the light irradiance and power generation power with each other Analyze the mutual influence of each other and give the corresponding relationship curve and comparison table for use by the analysis and processing module; the analysis and processing module is connected with the human-computer interaction subsystem, which is used to analyze the corresponding relationship curve and comparison according to the light irradiance data, real-time data of power generation, and the corresponding relationship curve. table, calculate the estimated value of photovoltaic system power generation, and send the calculation result to the human-computer interaction subsystem.

The power generation metering device is a photovoltaic power generation meter equipped with an RS485 communication interface in the photovoltaic power generation system, and the self-learning module is connected with the power generation metering device through the RS485 communication network.

The wireless sending module and the wireless receiving module that make up the wireless communication subsystem all use the same wireless communication module to realize the functions of wireless data sending and receiving respectively.

The wireless communication sending module includes: a controller, sending a data sending command according to the received data sending signal; a wireless transceiver, connected to the controller, sending data according to the data sending command; a memory, connected to The controller is used to store data; the power module is connected to the controller, the wireless transceiver and the memory to provide the required power; wherein, the controller is connected to the external device through the I/O interface.

The anti-stealing system for photovoltaic power generation provided by the present invention can monitor photovoltaic power generation devices in real time, prevent cheating in the measurement of photovoltaic power generation, and then defraud power generation subsidies.

Description of drawings

Fig. 1 is a schematic structural diagram of a photovoltaic power generation anti-stealing system provided by the present invention.

FIG. 2 is a block diagram of a wireless communication module in an embodiment of the present invention.

Detailed ways

The photovoltaic power generation anti-stealing system provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the photovoltaic power generation anti-stealing system provided by the present invention includes: a measurement subsystem 100, a wireless communication subsystem 200, an operating state judgment subsystem 300, and a human-computer interaction subsystem 400; wherein: the measurement subsystem 100 passes The wireless communication subsystem is connected with the wireless communication subsystem 200, the operating state judging subsystem 300, and the operating state judging subsystem 300 is respectively connected with the human-computer interaction subsystem 400 and the power generation metering device 500;

The measurement subsystem 100 includes a plurality of irradiance sensors 102. The irradiance sensors 102 are used to measure the relative light irradiance of the photovoltaic panel installation site. The irradiance sensor 102 can measure the light irradiation on the surface of the photovoltaic panel in real time. Each system can be equipped with 4 to 10 light irradiance sensors 102 according to the installation conditions of photovoltaic panels. Multiple irradiance sensors 102 will upload the digitized light irradiance values to the operating state judgment sub-system through the wireless communication subsystem 200. System 300.

The wireless communication subsystem 200 is composed of a plurality of wireless sending modules connected with each irradiance sensor 102 and a wireless receiving module connected with the operating state judgment subsystem 300; since the light irradiance sensors are installed scattered and far away, The communication between the device and the sensor adopts the wireless communication method to form a network; the wireless communication adopts zigbee, which is a very mature communication solution, with the characteristics of high reliability, low module price and easy procurement, which can fully meet the requirements of the system for communication. Speed and reliability requirements;

The operating state judging subsystem 300 is a data processing device for judging the operating state of the photovoltaic system, and its function is to provide an estimated value of photovoltaic system power generation according to light irradiance, power generation power, etc. combined with historical data, and compare it with The power of the meter is compared, and the operating status of the system is given: normal and abnormal, for the reference of relevant personnel;

The operating state judgment subsystem 300 is mainly composed of three data processing sub-modules: including a data processing module 301, a self-learning module 302 and an analysis processing module 303, wherein the data processing module 301 is connected with the wireless transmission module and the wireless communication subsystem 200 in the wireless communication subsystem 200. The self-learning module 302 is connected, and is used for measuring the light irradiance real-time data sent by the subsystem 100 and processing the data for use by the self-learning module 302 and the analysis and processing module 303; the self-learning module 302 is connected with the power generation metering device respectively 500 is connected with the analysis and processing module 303, and is used to receive the light irradiance data processed by the data processing module 301 and read the real-time data of power generation in the power generation metering device 500, and then record the historical data including light irradiance and power generation , and analyze the interaction between light irradiance and power generation power to provide a corresponding relationship curve and a comparison table for the analysis and processing module 303 to use; the analysis and processing module 303 is connected with the human-computer interaction subsystem 400 for The irradiance data, the real-time data of power generation and the corresponding relationship curve and comparison table calculate the estimated value of the power generation of the photovoltaic system, and send the calculation result to the human-computer interaction subsystem 400; the analysis and processing module 303 also returns the curve of the light irradiance Detailed records and analysis can make judgments on abnormal behaviors, such as using irradiation methods to increase irradiance and other behaviors, to ensure the accuracy of system discrimination.

In this technical solution, the analysis and processing module 303 compares the estimated value of the power generation of the power generation system with the actual power of the meter, and can judge whether the power generation system is in a normal operating state according to the difference between the two. If the two are similar, If it is within the allowable difference range, it means that the photovoltaic power generation system is operating normally. If there is a large difference between the two, it means that the photovoltaic power generation system is not operating normally.

The power generation metering device 500 is a photovoltaic power generation meter equipped with an RS485 communication interface in the photovoltaic power generation system, and the self-learning module 302 is connected to the power generation metering device 50 through the RS485 communication network.

The human-computer interaction subsystem 400 is a user interaction platform, and its main function is to display system data and output results in an intuitive manner, and at the same time accept settings and instructions from operation and maintenance personnel; Estimated curves, power generation estimates, and display the actual power generation curve and power generation of the photovoltaic system at the same time, so that the operation and maintenance personnel can clearly understand the power generation situation and the actual power generation situation, and give the system operation status: normal, abnormal, and prompt the monitoring personnel to deal with it .

The wireless sending module and the wireless receiving module forming the wireless communication subsystem 200 all use the same wireless communication module 210 to realize the functions of wireless data sending and receiving respectively; the wireless communication module 210 is a microcomputer system specially designed for sensor networks , is the basic unit of the wireless sensor network, it is responsible for sensing and information preprocessing, sending or receiving data in response to the instructions of the monitoring host;

As shown in Figure 2, the wireless communication sending module 210 includes: a controller 212, which sends a data sending command according to the received data sending signal; a wireless transceiver 214, connected to the controller 202, according to the The data sending command is used to send data; the memory 216 is connected to the controller 212 for storing data; the power module 218 is connected to the controller 212, the wireless transceiver 214 and the memory 216 to provide the required power. Wherein, the controller 212 is connected with external devices through an I/O interface.

The technical solution of the present invention has been described in detail above in conjunction with the accompanying drawings. Through the technical solution of the present invention, the operating status of the system can be given to prevent cheating in the measurement of photovoltaic power generation, and then fraudulently obtain subsidies.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. 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.

Claims (7)

1. A photovoltaic power generation anti-stealing system, characterized in that: the photovoltaic power generation anti-stealing system includes: measurement subsystem (100), wireless communication subsystem (200), operating state judgment subsystem (300) and The human-computer interaction subsystem (400); wherein: the measurement subsystem (100) is connected to the wireless communication subsystem (200) operating state judgment subsystem (300) through the wireless communication subsystem, and the operating state judgment subsystem (300) is respectively It is connected with the human-computer interaction subsystem (400) and the power generation metering device (500). 2. The photovoltaic power generation anti-stealing system according to claim 1, characterized in that: the measurement subsystem (100) includes a plurality of irradiance sensors (102), and the irradiance sensors (102) are used to measure Photovoltaic panel installation site related light irradiance, the irradiance sensor (102) can measure the light irradiance on the surface of the photovoltaic panel in real time, each system can be equipped with 4 to 10 light irradiance sensors according to the installation situation of the photovoltaic panel ( 102), a plurality of irradiance sensors (102) upload the digitized light irradiance value to the operating state judgment subsystem (300) through the wireless communication subsystem (200). 3. The photovoltaic power generation anti-stealing system according to claim 1, characterized in that: the wireless communication subsystem (200) is composed of a plurality of wireless transmission modules connected with each irradiance sensor (102) and the operating status The judging subsystem (300) is composed of connected wireless receiving modules; since the light irradiance sensors are scattered and far away, the communication between the devices and the sensors adopts a wireless communication network; the wireless communication adopts zigbee. 4. The photovoltaic power generation anti-stealing system according to claim 1, characterized in that: the operating state judging subsystem (300) is mainly composed of three data processing sub-modules: comprising a data processing module (301), an automatic A learning module (302) and an analysis processing module (303), wherein the data processing module (301) is connected with the wireless sending module and the self-learning module (302) in the wireless communication subsystem (200), and is used for measuring the subsystem ( 100) send the light irradiance real-time data and process the data for use by the self-learning module (302) and the analysis processing module (303); The processing module (303) is connected, and is used to receive the light irradiance data processed by the data processing module (301) and read the real-time data of power generation in the power generation metering device (500), and then record the data including light irradiance and power generation. power historical data, and analyze the interaction between light irradiance and power generation power to provide a corresponding relationship curve and a comparison table for the analysis and processing module (303); the analysis and processing module (303) and the human-computer interaction subsystem ( 400) are connected to each other, and are used to calculate the estimated value of the power generation of the photovoltaic system according to the light irradiance data, real-time power generation data, corresponding relationship curve and comparison table, and send the calculation result to the human-computer interaction subsystem (400). 5. The photovoltaic power generation anti-stealing system according to claim 1, characterized in that: the power generation metering device (500) is a photovoltaic power generation meter configured with an RS485 communication interface in the photovoltaic power generation system, and the self-learning module ( 302) Connect with the power generation metering device (50) through the RS485 communication network. 6. The photovoltaic power generation anti-stealing system according to claim 1, characterized in that: the wireless sending module and the wireless receiving module forming the wireless communication subsystem (200) all use the same wireless communication module (210) To realize the functions of wireless data transmission and reception respectively. 7. The photovoltaic power generation anti-stealing system according to claim 1, characterized in that: the wireless communication sending module (210) includes: a controller (212), which sends a data sending command according to the received data sending signal ; Wireless transceiver (214), connected to the controller (202), according to the data transmission command, send data; memory (216), connected to the controller (212), for storing data; power supply module (218), connected to the controller (212), wireless transceiver (214) and memory (216), to provide the required power; wherein, the controller (212) is connected to the external device through the I/O interface.