Photovoltaic inverter operation state online monitoring device and photovoltaic inverter system
A photovoltaic inverter and operating state technology, applied in the photovoltaic field, can solve the problems of complicated wired monitoring wiring, large communication power consumption, short communication distance, etc., and achieve the effect of reducing the probability of failure, long battery life, and improving simplicity
Inactive Publication Date: 2020-05-29
48TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology
The traditional inverter monitoring technology has the following disadvantages: (1) large communication power consumption; (2) short communication distance; (3) complicated wiring for wired monitoring
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[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0026] Such as figure 1 As shown, the photovoltaic inverter operating state online monitoring device of this embodiment includes a sensing layer 1, a network layer 2 and an application layer 3; the sensing layer 1 includes a LoRa monitoring module 101, and the LoRa monitoring module 101 includes a current sensor 102, a signal conditioning Circuit 103, LoRa transmitting module 104, energy-taking module 105 and power management module 106; current sensor 102, signal conditioning circuit 103 and LoRa transmitting module 104 are connected in sequence; current sensor 102 is used to detect the three-phase output current of the photovoltaic inverter; The signal conditioning circuit 103 is used to modulate and demodulate the output current detected by the current sensor 102, and send it to the LoRa transmitter module 104; the LoRa transmitter module 10...
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The invention discloses a photovoltaic inverter operation state online monitoring device and a photovoltaic inverter system, belongs to the technical field of photovoltaics, and aims to solve the problems of high monitoring power consumption, short distance, complex wiring and the like of a conventional photovoltaic inverter, and the photovoltaic inverter operation state online monitoring device comprises a sensing layer, a network layer and an application layer, the sensing layer comprises a LoRa monitoring module, and the LoRa monitoring module comprises a current sensor, a signal conditioning circuit, a LoRa transmitting module, an energy taking module and a power management module; the current sensor is used for detecting the output current of the photovoltaic inverter; the signal conditioning circuit is used for processing the output current detected by the current sensor; the LoRa transmitting module is used for transmitting the output current to the network layer so as to transmit the output current to the application layer for analysis; the energy taking module is used for sensing electric energy from an output end of the inverter and transmitting the electric energy to thepower management module, and the power management module is used for storing the electric energy and providing the electric energy for the signal conditioning circuit and the LoRa transmitting module. The device and the system have the advantages of low power consumption, long communication distance, no need for wiring, self power supply and the like.
Description
technical field [0001] The invention mainly relates to the field of photovoltaic technology, in particular to an online monitoring device for the operating state of a photovoltaic inverter and a photovoltaic inverter system. Background technique [0002] In recent years, the photovoltaic industry has developed rapidly. Among them, power electronic equipment is one of the basic equipment in the photovoltaic industry, and research on the operating characteristics of power electronic equipment has become an important direction. The inverter is the core device of solar power generation technology, which directly reflects the operation status of the power generation system, so the online monitoring of the inverter operation has important practical significance. During the working process of the inverter, its switching devices are most prone to failure. Once a failure occurs, it will directly affect the current on the DC output side. Therefore, the current at the DC output side ...
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IPC IPC(8): G01R31/40H02S50/00G08C17/02
CPCG01R31/40G08C17/02H02S50/00Y02E10/50
Inventor 周进吴限
Owner 48TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP