Three-phase inverter based on inversion and control integration and control method thereof
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A three-phase inverter, all-in-one technology, used in collectors, multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, etc., can solve problems such as system shutdown, unusable load, and too many cables , to reduce system cost, provide compatibility, and have the effect of strong load capacity
Pending Publication Date: 2020-04-10
广东欣顿电源科技有限公司
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Problems solved by technology
[0003] 1. The photovoltaic controller and the three-phase inverter are separated (that is, one photovoltaic controller and one three-phase inverter are required). This method will make the field wiring more complicated and require more cables.
[0004] 2. The traditional three-phase inverter in the system does not support the complementary input of mains power (or diesel and gasoline generators). When the photovoltaic power in the system does not generate energy and the battery is out of power, the entire system shuts down and the load cannot be used, which cannot be realized. intelligent
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Embodiment 1
[0046] The present invention provides such Figure 1-6 The shown is a three-phase inverter based on inverter control integration, including photovoltaic panels, batteries, three-phase mains and three working modes, and also includes:
[0047] The photovoltaic controller module is used to control the input of photovoltaic energy from photovoltaic panels;
[0048] The DC / AC converter is used to convert the DC power processed by the photovoltaic controller module and the DC power of the battery into the AC power required by the load;
[0049] The mains bypass module is used to switch the mains to supply power for the load or charge the battery;
[0050] The DSP digital processor module is used to coordinate and control the working status of the photovoltaic controller module, DC / AC converter and mains bypass module;
[0051] The three working modes are set as battery priority mode, mains power priority mode and energy saving mode.
[0052] The connection end of the DSP digital...
Embodiment 2
[0061] The invention discloses a control method of a three-phase inverter based on an integrated inverter control, which includes the following specific steps:
[0062] 1) When the working mode is set to battery priority mode, the working mode at this time is:
[0063] A. When the photovoltaic energy is sufficient, a part of the photovoltaic energy in the photovoltaic panel is controlled by the photovoltaic controller module and then converted by the DC / AC converter to supply power to the load, and the excess energy is then charged to the battery (see image 3 );
[0064] B. When the photovoltaic energy is insufficient, the photovoltaic energy and battery energy are converted together by the DC / AC converter to supply power to the load (see Figure 4 );
[0065] C. When the photovoltaic has no power generation energy and the battery is dead, the mains bypass module is put into operation, and the three-phase mains supplies power to the load through the mains bypass module (see...
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Abstract
The invention discloses a three-phase inverter based on inversion and control integration and a control method of the three-phase inverter, and relates to the technical field of photovoltaic off-gridthree-phase power generation. The three-phase inverter comprises a photovoltaic panel, a storage battery, three-phase mains supply and three working modes, and the three-phase inverter also comprisesa photovoltaic controller module which is used for controlling the input of photovoltaic energy of the photovoltaic panel; a DC / AC converter which is used for converting the direct current processed by the photovoltaic controller module and the direct current of the storage battery into alternating current required by a load; and a mains supply bypass module which is used for switching the mains supply to supply power to the load or charge the storage battery. According to the invention, the three-phase inverter and the photovoltaic controller are combined together, complementary input of mains supply is supported, and three-phase unbalanced loading is also supported. The three-phase inverter can work in three modes, namely, a mains supply priority mode, a battery priority mode and an energy-saving mode, can be switched freely, intelligence of the photovoltaic off-grid three-phase power generation system is achieved, compatibility of the system is greatly improved, power utilization requirements of different users are met, and system cost is reduced.
Description
technical field [0001] The invention relates to the technical field of photovoltaic off-grid three-phase power generation, in particular to a three-phase inverter based on integrated inverter control and a control method thereof. Background technique [0002] In the traditional field of solar photovoltaic off-grid three-phase power generation, the solar photovoltaic off-grid three-phase power generation system usually consists of solar photovoltaic modules, photovoltaic controllers, three-phase inverters, and battery packs. Its working mode is generally: when the photovoltaic energy is sufficient, the photovoltaic powers the load and charges the battery; when the photovoltaic energy is insufficient, the photovoltaic and the battery supply power to the load; when the photovoltaic energy is not generated, the battery supplies power to the load. When the PV does not generate energy and the battery is out of power, the entire system shuts down and the load cannot be used. Howev...
Claims
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Application Information
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