CN110806520A - Photovoltaic power plant fault detection system - Google Patents
Photovoltaic power plant fault detection system Download PDFInfo
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- CN110806520A CN110806520A CN201911041180.7A CN201911041180A CN110806520A CN 110806520 A CN110806520 A CN 110806520A CN 201911041180 A CN201911041180 A CN 201911041180A CN 110806520 A CN110806520 A CN 110806520A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
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- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
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- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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Abstract
The invention provides a fault detection system for a photovoltaic power station, and belongs to the technical field of photovoltaic power stations. The photovoltaic power station fault detection system comprises a photovoltaic power station, a monitoring center and a first communication module. The photovoltaic power station comprises a fault detection terminal, the monitoring center comprises a monitoring terminal, and the single-chip microcomputer processor is connected to the monitoring center through a first communication module. The single chip processor is connected to the monitoring center through a first communication module, the first communication module can be a GPRS module, an SMS module or a GIS module, and by means of a wireless transmission technology, an operator of the monitoring center can know information of the fault detection terminal in real time through a central monitoring computer. After the detection center finds that the single chip processor end works abnormally, the staff of the photovoltaic power station is reminded in time, and the staff of the photovoltaic power station can overhaul in time.
Description
Technical Field
The invention relates to the field of photovoltaic power stations, in particular to a photovoltaic power station fault detection system.
Background
At present, photovoltaic power generation is vigorously developed as renewable clean energy power generation. At present, photovoltaic power generation is mainly divided into roof and large-scale ground power stations, and the ground power stations are more desert power stations, and most of the ground power stations are unattended or unattended. With the large-scale construction of photovoltaic power stations, the problems of frequent equipment failure, unstable operation of equipment, untimely response of equipment failure, low working performance of equipment and the like occur, and the problems affect the overall power generation capacity of the power stations and bring direct economic loss to users. At present, in a data acquisition and monitoring system for a photovoltaic power generation system, an effective fault detection means is lacked, fault detection mainly depends on manual inspection and is compared through manual measurement of a universal meter, the fault processing period is long, the power generation output is influenced, the maintenance efficiency is low, and the labor investment is large.
Disclosure of Invention
In order to make up for the defects, the invention provides a photovoltaic power station fault detection system, and aims to solve the problems of low maintenance efficiency and large manpower input of a photovoltaic power station fault detection method.
The invention is realized by the following steps:
a photovoltaic power station fault detection system comprises a photovoltaic power station, a monitoring center and a first communication module.
Photovoltaic power plant includes fault detection terminal, fault detection terminal includes singlechip treater, alarm module, divide-shut brake switch, second communication module and detection module, alarm module with divide-shut brake switch all is connected to the singlechip treater, second communication module is LPWAN communication module, detection module is connected to the singlechip treater through LPWAN communication module, detection module includes temperature detection module, smog detection module, voltage detection module, current detection module, fault current collection module and zero sequence voltage collection module.
The monitoring center comprises a monitoring terminal, the monitoring terminal comprises a gateway server, a central processing unit and a human-computer interaction interface, and the gateway server and the human-computer interaction interface are connected to the central processing unit through communication interfaces.
The single chip processor is connected to the monitoring center through the first communication module.
In an embodiment of the present invention, the first communication module is a GPRS module, and the single chip processor is connected to the monitoring center through the GPRS module. The communication module is an SMS module, the fault detection terminal is connected to a server of the detection central station through the SMS module, an operator of a working station in the detection central station utilizes the central monitoring computer to know information of the fault detection terminal in real time, the detection central station drives the alarm module to work through the driving circuit, sound and light alarm can be achieved, and the operator can be reminded of timely
In an embodiment of the present invention, the first communication module is an SMS module, and the single chip processor is connected to the monitoring center through the SMS module.
In an embodiment of the present invention, the first communication module is a GIS module, and the single chip processor is connected to the monitoring center through the GIS module.
In an embodiment of the invention, the LPWAN communication module comprises two parts, namely an LoRa module and an NB-IoT module, and the LPWAN communication module is embedded with a high-speed low-power-consumption single chip microcomputer and a high-performance spread spectrum radio frequency chip. The two communication modules are controlled by the MCU to realize data transceiving of the LPWAN. Multi-mode LPWAN network communications may be implemented. The two communication modules are mainstream products of LPWAN communication technology, have the characteristics of long distance, low cost, low power consumption and the like, and are suitable for remote meter counting, outdoor parking, industrial monitoring and other Internet of things terminal equipment. The communication module provides an up/down communication pipeline, transmits terminal data to a server background, and can also receive various control commands issued by the server.
The module is a highly integrated low-power consumption half-duplex low-power wireless data transmission module, a high-speed low-power consumption singlechip and a high-performance spread spectrum radio frequency chip are embedded, and the anti-interference performance and the sensitivity are greatly improved by a high-efficiency spread spectrum communication mode. The module provides a plurality of channels for selection and supports online modification of various parameters such as serial port rate, transceiving frequency, transmitting power, radio frequency rate and the like.
The module adopts a spread spectrum communication mechanism to greatly improve the sensitivity, the highest sensitivity can reach-135 dBm, and the transmission distance can be greatly prolonged under the condition of low power consumption, so that a relay device and a complex communication infrastructure do not need to be added. Due to the fact that the transmission distance is greatly increased, the use of repeaters is greatly reduced, scheme design is simplified, and therefore system cost is greatly reduced.
The LPWAN communication module is responsible for functions of front-end data acquisition, data preprocessing, information wireless transceiving and the like of the LPWAN system in an application field, and generally requires low power consumption, high protection performance and low cost of equipment. The communication module software portion includes: HAL layer analysis of the RF module, LPWAN MAC layer analysis and application control software of the sensor.
In an embodiment of the present invention, a temperature sensor is disposed in the temperature detection module, the temperature detection module is configured to detect an ambient temperature, the smoke detection module includes a smoke sensor, the smoke detection module is configured to detect smoke, the voltage detection module includes a voltage detection module, the voltage detection module is configured to detect voltage, the current detection module includes an ammeter detection module, the current detection module is configured to detect current, and the fault current collection module and the zero sequence voltage collection module are respectively configured to collect fault current and zero sequence voltage.
In an embodiment of the present invention, the fault detection terminal further includes a positioning module, the positioning module is a GPS positioning module, an output end of the positioning module is connected to a wireless transmission module through a serial port, the wireless transmission module includes a wireless signal transmitter and a wireless signal receiver, the wireless signal transmitter and the wireless signal receiver are connected by radio, and the type of the wireless signal transmitter is: JY-A4FZ, the wireless signal receiver model is: LoRa 6100.
In an embodiment of the present invention, the fault detection terminal further includes a power module, and the power module supplies power to the single chip processor after converting a 3.3V level through the LDO. The power circuit of the power module is a circuit built by adopting an LM2576 chip, the integration level can be improved, the use is convenient, and the power supply and the principle of the power module are clear to those skilled in the art and are not described in detail herein
In one embodiment of the invention, the alarm module comprises a buzzer and an alarm lamp, the SP model of the buzzer is LZQ-2715B220V, the model of the alarm lamp is LTE5071J, the buzzer and the alarm lamp are both connected to an embedded processor through serial ports, and the embedded processor is MSP430F 5438A.
In an embodiment of the invention, the human-computer interaction interface includes a display, a keyboard and a mouse, and the display is an LED display.
The invention has the beneficial effects that: according to the photovoltaic power station fault detection system obtained through the design, when the system is used, the single chip processor is connected to the monitoring center through the first communication module, the first communication module can be a GPRS module, an SMS module or a GIS module, by utilizing a wireless transmission technology, an operator of the detection center can know information of the fault detection terminal in real time through the central monitoring computer, and can remind the operator of the photovoltaic power station in time after the detection center finds that the end of the single chip processor is abnormal, so that the system is beneficial for the operator of the photovoltaic power station to overhaul in time, the fault processing period is short, the influence on power generation is effectively reduced, a large amount of manpower is not required to be invested, the working conditions of a plurality of photovoltaic power stations can be supervised at the same time, and the.
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In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a system block diagram of a photovoltaic power plant fault detection system provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of a fault detection terminal according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a monitoring terminal according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but 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, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the 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, are within the scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example 1
Referring to fig. 1, the present invention provides a technical solution: a photovoltaic power station fault detection system comprises a photovoltaic power station, a monitoring center and a first communication module.
Referring to fig. 2, the photovoltaic power generation station includes a fault detection terminal, the fault detection terminal includes a single-chip microcomputer processor, an alarm module, a switching-on/off switch, a second communication module and a detection module, the alarm module and the switching-on/off switch are both connected to the single-chip microcomputer processor, the second communication module is an LPWAN communication module, the detection module is connected to the single-chip microcomputer processor through the LPWAN communication module, and the detection module includes a temperature detection module, a smoke detection module, a voltage detection module, a current detection module, a fault current collection module and a zero sequence voltage collection module.
Referring to fig. 3, the monitoring center includes a monitoring terminal, the monitoring terminal includes a gateway server, a central processing unit and a human-computer interaction interface, the gateway server and the human-computer interaction interface are both connected to the central processing unit through communication interfaces, the human-computer interaction interface includes a display, a keyboard and a mouse, and the display is an LED display.
The single chip processor is connected to the monitoring center through the first communication module.
When the monitoring system is specifically set, the first communication module is a GPRS module, and the single-chip processor is connected to the monitoring center through the GPRS module. When the intelligent monitoring system is used, the GPRS wireless transmission technology is utilized, operators of a detection center utilize a central monitoring computer to know information of a fault detection terminal in real time, and the detection center timely reminds workers of a photovoltaic power station after finding that a single-chip processor end works abnormally, so that the workers of the photovoltaic power station can be timely overhauled, the fault processing period is short, the influence on power generation is effectively reduced, a large amount of manpower is not required to be invested, and the maintenance cost is reduced.
In the application, the LPWAN communication module comprises an LoRa module and an NB-IoT module, and the LPWAN communication module is embedded into a high-speed low-power-consumption single chip microcomputer and a high-performance spread spectrum radio frequency chip. The two communication modules are controlled by the MCU to realize data transceiving of the LPWAN. Multi-mode LPWAN network communications may be implemented. The two communication modules are mainstream products of LPWAN communication technology, have the characteristics of long distance, low cost, low power consumption and the like, and are suitable for remote meter counting, outdoor parking, industrial monitoring and other Internet of things terminal equipment. The communication module provides an up/down communication pipeline, transmits terminal data to a server background, and can also receive various control commands issued by the server.
The module is a highly integrated low-power consumption half-duplex low-power wireless data transmission module, a high-speed low-power consumption singlechip and a high-performance spread spectrum radio frequency chip are embedded, and the anti-interference performance and the sensitivity are greatly improved by a high-efficiency spread spectrum communication mode. The module provides a plurality of channels for selection and supports online modification of various parameters such as serial port rate, transceiving frequency, transmitting power, radio frequency rate and the like.
The module adopts a spread spectrum communication mechanism to greatly improve the sensitivity, the highest sensitivity can reach-135 dBm, and the transmission distance can be greatly prolonged under the condition of low power consumption, so that a relay device and a complex communication infrastructure do not need to be added. Due to the fact that the transmission distance is greatly increased, the use of repeaters is greatly reduced, scheme design is simplified, and therefore system cost is greatly reduced.
The LPWAN communication module is responsible for functions of front-end data acquisition, data preprocessing, information wireless transceiving and the like of the LPWAN system in an application field, and generally requires low power consumption, high protection performance and low cost of equipment. The communication module software portion includes: HAL layer analysis of the RF module, LPWAN MAC layer analysis and application control software of the sensor.
It should be noted that, the temperature sensor is arranged in the temperature detection module, the temperature detection module is used for detecting the ambient temperature, the smoke detection module comprises a smoke sensor, the smoke detection module is used for detecting smoke, the voltage detection module comprises a voltage detection module, the voltage detection module is used for detecting voltage, the current detection module comprises an ammeter detection module, the current detection module is used for detecting current, the fault current collection module and the zero sequence voltage collection module are respectively used for collecting the fault current and the zero sequence voltage.
In some other embodiments, the fault detection terminal further includes a positioning module, the positioning module is a GPS positioning module, and an output end of the positioning module is connected with a wireless transmission module through a serial port, the wireless transmission module includes a wireless signal transmitter and a wireless signal receiver, the wireless signal transmitter and the wireless signal receiver are connected through radio, and the wireless signal transmitter has a model: JY-A4FZ, the wireless signal receiver model is: LoRa 6100.
In other embodiments, the fault detection terminal further comprises a power module, and the power module supplies power to the single chip processor after converting the 3.3V level through the LDO. The power circuit of the power module is a circuit built by adopting an LM2576 chip, the integration level can be improved, the use is convenient, and the power supply and the principle of the power module are clear to those skilled in the art and are not described in detail herein.
It should be noted that the alarm module includes a buzzer and an alarm lamp, the model of the buzzer is LZQ-2715B220V, the model of the alarm lamp is LTE5071J, the buzzer and the alarm lamp are both connected to an embedded processor through serial ports, and the model of the embedded processor is MSP430F 5438A. When specifically setting up, after the detection center finds singlechip processor end unusual, in time remind photovoltaic power plant's staff through this alarm module, bee calling organ whistle this moment, the alarm lamp scintillation.
Example 2
Referring to fig. 1, the present invention provides a technical solution: a photovoltaic power station fault detection system comprises a photovoltaic power station, a monitoring center and a first communication module.
Referring to fig. 2, the photovoltaic power generation station includes a fault detection terminal, the fault detection terminal includes a single-chip microcomputer processor, an alarm module, a switching-on/off switch, a second communication module and a detection module, the alarm module and the switching-on/off switch are both connected to the single-chip microcomputer processor, the second communication module is an LPWAN communication module, the detection module is connected to the single-chip microcomputer processor through the LPWAN communication module, and the detection module includes a temperature detection module, a smoke detection module, a voltage detection module, a current detection module, a fault current collection module and a zero sequence voltage collection module.
Referring to fig. 3, the monitoring center includes a monitoring terminal, the monitoring terminal includes a gateway server, a central processing unit and a human-computer interaction interface, the gateway server and the human-computer interaction interface are both connected to the central processing unit through communication interfaces, the human-computer interaction interface includes a display, a keyboard and a mouse, and the display is an LED display.
The single chip processor is connected to the monitoring center through the first communication module.
When the monitoring center is specifically set, the first communication module is an SMS module, and the single chip microcomputer processor is connected to the monitoring center through the SMS module. When the system is used, the SMS wireless transmission technology is utilized, operators of the detection center utilize the central monitoring computer to know information of the fault detection terminal in real time, and the detection center timely reminds workers of the photovoltaic power station after finding that the single chip processor end works abnormally, so that the workers of the photovoltaic power station can be timely overhauled, the fault processing period is short, the influence on power generation is effectively reduced, a large amount of manpower is not required to be invested, and the maintenance cost is reduced.
In the application, the LPWAN communication module comprises an LoRa module and an NB-IoT module, and the LPWAN communication module is embedded into a high-speed low-power-consumption single chip microcomputer and a high-performance spread spectrum radio frequency chip. The two communication modules are controlled by the MCU to realize data transceiving of the LPWAN. Multi-mode LPWAN network communications may be implemented. The two communication modules are mainstream products of LPWAN communication technology, have the characteristics of long distance, low cost, low power consumption and the like, and are suitable for remote meter counting, outdoor parking, industrial monitoring and other Internet of things terminal equipment. The communication module provides an up/down communication pipeline, transmits terminal data to a server background, and can also receive various control commands issued by the server.
The module is a highly integrated low-power consumption half-duplex low-power wireless data transmission module, a high-speed low-power consumption singlechip and a high-performance spread spectrum radio frequency chip are embedded, and the anti-interference performance and the sensitivity are greatly improved by a high-efficiency spread spectrum communication mode. The module provides a plurality of channels for selection and supports online modification of various parameters such as serial port rate, transceiving frequency, transmitting power, radio frequency rate and the like.
The module adopts a spread spectrum communication mechanism to greatly improve the sensitivity, the highest sensitivity can reach-135 dBm, and the transmission distance can be greatly prolonged under the condition of low power consumption, so that a relay device and a complex communication infrastructure do not need to be added. Due to the fact that the transmission distance is greatly increased, the use of repeaters is greatly reduced, scheme design is simplified, and therefore system cost is greatly reduced.
The LPWAN communication module is responsible for functions of front-end data acquisition, data preprocessing, information wireless transceiving and the like of the LPWAN system in an application field, and generally requires low power consumption, high protection performance and low cost of equipment. The communication module software portion includes: HAL layer analysis of the RF module, LPWAN MAC layer analysis and application control software of the sensor.
It should be noted that, the temperature sensor is arranged in the temperature detection module, the temperature detection module is used for detecting the ambient temperature, the smoke detection module comprises a smoke sensor, the smoke detection module is used for detecting smoke, the voltage detection module comprises a voltage detection module, the voltage detection module is used for detecting voltage, the current detection module comprises an ammeter detection module, the current detection module is used for detecting current, the fault current collection module and the zero sequence voltage collection module are respectively used for collecting the fault current and the zero sequence voltage.
In some other embodiments, the fault detection terminal further includes a positioning module, the positioning module is a GPS positioning module, and an output end of the positioning module is connected with a wireless transmission module through a serial port, the wireless transmission module includes a wireless signal transmitter and a wireless signal receiver, the wireless signal transmitter and the wireless signal receiver are connected through radio, and the wireless signal transmitter has a model: JY-A4FZ, the wireless signal receiver model is: LoRa 6100.
In other embodiments, the fault detection terminal further comprises a power module, and the power module supplies power to the single chip processor after converting the 3.3V level through the LDO. The power circuit of the power module is a circuit built by adopting an LM2576 chip, the integration level can be improved, the use is convenient, and the power supply and the principle of the power module are clear to those skilled in the art and are not described in detail herein.
It should be noted that the alarm module includes a buzzer and an alarm lamp, the model of the buzzer is LZQ-2715B220V, the model of the alarm lamp is LTE5071J, the buzzer and the alarm lamp are both connected to an embedded processor through serial ports, and the model of the embedded processor is MSP430F 5438A. When specifically setting up, after the detection center finds singlechip processor end unusual, in time remind photovoltaic power plant's staff through this alarm module, bee calling organ whistle this moment, the alarm lamp scintillation.
Example 3
Referring to fig. 1, the present invention provides a technical solution: a photovoltaic power station fault detection system comprises a photovoltaic power station, a monitoring center and a first communication module.
Referring to fig. 2, the photovoltaic power generation station includes a fault detection terminal, the fault detection terminal includes a single-chip microcomputer processor, an alarm module, a switching-on/off switch, a second communication module and a detection module, the alarm module and the switching-on/off switch are both connected to the single-chip microcomputer processor, the second communication module is an LPWAN communication module, the detection module is connected to the single-chip microcomputer processor through the LPWAN communication module, and the detection module includes a temperature detection module, a smoke detection module, a voltage detection module, a current detection module, a fault current collection module and a zero sequence voltage collection module.
Referring to fig. 3, the monitoring center includes a monitoring terminal, the monitoring terminal includes a gateway server, a central processing unit and a human-computer interaction interface, the gateway server and the human-computer interaction interface are both connected to the central processing unit through communication interfaces, the human-computer interaction interface includes a display, a keyboard and a mouse, and the display is an LED display.
The single chip processor is connected to the monitoring center through the first communication module.
When the monitoring system is specifically arranged, the first communication module is a GIS module, and the single-chip processor is connected to the monitoring center through the GIS module. When the system is used, the SMS wireless transmission technology is utilized, operators of the detection center utilize the central monitoring computer to know information of the fault detection terminal in real time, and the detection center timely reminds workers of the photovoltaic power station after finding that the single chip processor end works abnormally, so that the workers of the photovoltaic power station can be timely overhauled, the fault processing period is short, the influence on power generation is effectively reduced, a large amount of manpower is not required to be invested, and the maintenance cost is reduced.
In the application, the LPWAN communication module comprises an LoRa module and an NB-IoT module, and the LPWAN communication module is embedded into a high-speed low-power-consumption single chip microcomputer and a high-performance spread spectrum radio frequency chip. The two communication modules are controlled by the MCU to realize data transceiving of the LPWAN. Multi-mode LPWAN network communications may be implemented. The two communication modules are mainstream products of LPWAN communication technology, have the characteristics of long distance, low cost, low power consumption and the like, and are suitable for remote meter counting, outdoor parking, industrial monitoring and other Internet of things terminal equipment. The communication module provides an up/down communication pipeline, transmits terminal data to a server background, and can also receive various control commands issued by the server.
The module is a highly integrated low-power consumption half-duplex low-power wireless data transmission module, a high-speed low-power consumption singlechip and a high-performance spread spectrum radio frequency chip are embedded, and the anti-interference performance and the sensitivity are greatly improved by a high-efficiency spread spectrum communication mode. The module provides a plurality of channels for selection and supports online modification of various parameters such as serial port rate, transceiving frequency, transmitting power, radio frequency rate and the like.
The module adopts a spread spectrum communication mechanism to greatly improve the sensitivity, the highest sensitivity can reach-135 dBm, and the transmission distance can be greatly prolonged under the condition of low power consumption, so that a relay device and a complex communication infrastructure do not need to be added. Due to the fact that the transmission distance is greatly increased, the use of repeaters is greatly reduced, scheme design is simplified, and therefore system cost is greatly reduced.
The LPWAN communication module is responsible for functions of front-end data acquisition, data preprocessing, information wireless transceiving and the like of the LPWAN system in an application field, and generally requires low power consumption, high protection performance and low cost of equipment. The communication module software portion includes: HAL layer analysis of the RF module, LPWAN MAC layer analysis and application control software of the sensor.
It should be noted that, the temperature sensor is arranged in the temperature detection module, the temperature detection module is used for detecting the ambient temperature, the smoke detection module comprises a smoke sensor, the smoke detection module is used for detecting smoke, the voltage detection module comprises a voltage detection module, the voltage detection module is used for detecting voltage, the current detection module comprises an ammeter detection module, the current detection module is used for detecting current, the fault current collection module and the zero sequence voltage collection module are respectively used for collecting the fault current and the zero sequence voltage.
In some other embodiments, the fault detection terminal further includes a positioning module, the positioning module is a GPS positioning module, and an output end of the positioning module is connected with a wireless transmission module through a serial port, the wireless transmission module includes a wireless signal transmitter and a wireless signal receiver, the wireless signal transmitter and the wireless signal receiver are connected through radio, and the wireless signal transmitter has a model: JY-A4FZ, the wireless signal receiver model is: LoRa 6100.
In other embodiments, the fault detection terminal further comprises a power module, and the power module supplies power to the single chip processor after converting the 3.3V level through the LDO. The power circuit of the power module is a circuit built by adopting an LM2576 chip, the integration level can be improved, the use is convenient, and the power supply and the principle of the power module are clear to those skilled in the art and are not described in detail herein.
It should be noted that the alarm module includes a buzzer and an alarm lamp, the model of the buzzer is LZQ-2715B220V, the model of the alarm lamp is LTE5071J, the buzzer and the alarm lamp are both connected to an embedded processor through serial ports, and the model of the embedded processor is MSP430F 5438A. When specifically setting up, after the detection center finds singlechip processor end unusual, in time remind photovoltaic power plant's staff through this alarm module, bee calling organ whistle this moment, the alarm lamp scintillation.
The working principle of the photovoltaic power station fault detection system is as follows: the system comprises a photovoltaic power station, a monitoring center and a first communication module, wherein when in use, a singlechip processor is connected to the monitoring center through the first communication module, the first communication module can be a GPRS module, an SMS module or a GIS module, by using a wireless transmission technology, an operator of the detection center can know information of a fault detection terminal in real time by using a central monitoring computer, after the detection center finds that the end of the singlechip processor works abnormally, the operator of the photovoltaic power station is reminded in time, the timely maintenance of the operator of the photovoltaic power station is facilitated, the fault processing period is short, the influence on power generation is effectively reduced, a large amount of manpower is not required to be invested, the working conditions of a plurality of photovoltaic power stations can be monitored at the same time, the maintenance cost is reduced, the temperature detection module is used for detecting the ambient temperature, the smoke detection module is used for, the current detection module is used for detecting current, the fault current acquisition module and the zero sequence voltage acquisition module are respectively used for acquiring fault current and zero sequence voltage, in addition, the second communication module is an LPWAN communication module, a highly integrated low-power consumption half-duplex low-power wireless data transmission module is embedded into a high-speed low-power consumption single chip microcomputer and a high-performance spread spectrum radio frequency chip, and the anti-interference performance and the sensitivity are greatly improved in a high-efficiency spread spectrum communication mode.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A photovoltaic power station fault detection system is characterized by comprising
The photovoltaic power generation station comprises a fault detection terminal, the fault detection terminal comprises a single chip microcomputer processor, an alarm module, a switching-on/off switch, a second communication module and a detection module, the alarm module and the switching-on/off switch are connected to the single chip microcomputer processor, the second communication module is an LPWAN communication module, the detection module is connected to the single chip microcomputer processor through the LPWAN communication module, and the detection module comprises a temperature detection module, a smoke detection module, a voltage detection module, a current detection module, a fault current collection module and a zero sequence voltage collection module;
the monitoring center comprises a monitoring terminal, the monitoring terminal comprises a gateway server, a central processing unit and a human-computer interaction interface, and the gateway server and the human-computer interaction interface are connected to the central processing unit through communication interfaces; and
and the single chip processor is connected to the monitoring center through the first communication module.
2. The photovoltaic power plant fault detection system of claim 1 wherein the first communication module is a GPRS module and the single chip processor is connected to the monitoring center via the GPRS module.
3. The photovoltaic power plant fault detection system of claim 1 wherein the first communication module is an SMS module and the single chip processor is connected to the monitoring center via the SMS module.
4. The photovoltaic power plant fault detection system of claim 1 wherein the first communication module is a GIS module and the single chip processor is connected to a monitoring center through the GIS module.
5. The system of claim 1, wherein the LPWAN communication module comprises an LoRa module and an NB-IoT module, and the LPWAN communication module is embedded with a high-speed low-power-consumption single chip microcomputer and a high-performance spread spectrum radio frequency chip.
6. The system of claim 1, wherein the temperature detection module is embedded with a temperature sensor and is configured to detect an ambient temperature, the smoke detection module comprises a smoke sensor and is configured to detect smoke, the voltage detection module comprises a voltage detection module and is configured to detect a voltage, the current detection module comprises an ammeter detection module and is configured to detect a current, and the fault current collection module and the zero sequence voltage collection module are respectively configured to collect a fault current and a zero sequence voltage.
7. The system of claim 1, wherein the fault detection terminal further comprises a positioning module, the positioning module is a GPS positioning module, and an output end of the positioning module is connected with a wireless transmission module through a serial port, the wireless transmission module comprises a wireless signal transmitter and a wireless signal receiver, the wireless signal transmitter and the wireless signal receiver are connected through radio, and the wireless signal transmitter is of a type: JY-A4FZ, the wireless signal receiver model is: LoRa 6100.
8. The system of claim 1, wherein the fault detection terminal further comprises a power module, and the power module supplies power to the single chip processor after converting a 3.3V level through the LDO.
9. The photovoltaic power plant fault detection system of claim 1, wherein the alarm module comprises a buzzer and an alarm lamp, the buzzer SP model is selected as LZQ-2715B220V, the alarm lamp model is selected as LTE5071J, the buzzer and the alarm lamp are both connected to an embedded processor through a serial port, and the embedded processor model is MSP430F54 5438A.
10. The photovoltaic power plant fault detection system of claim 1, wherein the human-computer interface comprises a display, a keyboard and a mouse, and the display is an LED display.
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Application publication date: 20200218 |