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Commercial power complementation photovoltaic control inversion integrated machine and control strategy of

A photovoltaic control and all-in-one technology, applied in photovoltaic modules, photovoltaic power generation, electrical components, etc., can solve the problems of many output relays, high cost, and uncontrollable charging current, so as to reduce production costs, control the charging current, and ensure The effect of uninterrupted power supply

Inactive Publication Date: 2016-09-21
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This control inverter circuit is simple and easy to implement, but it has great disadvantages: 1) There are many transformer windings, and the cost is high; 2) There are many output relays, and the cost is high; 3) The charging current is uncontrollable

Method used

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  • Commercial power complementation photovoltaic control inversion integrated machine and control strategy of
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  • Commercial power complementation photovoltaic control inversion integrated machine and control strategy of

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Embodiment Construction

[0018] A mains complementary photovoltaic control and inverter integrated machine, including: a photovoltaic array, an MPPT controller, a battery pack, an inverter, a transformer, and a relay; the photovoltaic array is connected to the input end of the MPPT controller, and the output end of the MPPT controller is connected to the battery The terminal of the battery pack is connected to the input terminal of the inverter, the output terminal of the inverter is connected to the primary winding of the transformer, the secondary winding of the transformer is connected to the relay, the load is connected when the relay is inactive, and the power grid is connected when the relay is active.

[0019] The control strategy of the above-mentioned one kind of mains complementary photovoltaic control inverter integrated machine is as follows:

[0020] (1) In the off-grid state, the voltage outer loop and current inner loop mode are used: the output voltage of the AC side is sampled, and the...

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Abstract

The invention relates to a commercial power complementation photovoltaic control inversion integrated machine and a control strategy of. The integrated machine mainly comprises a photovoltaic array, an MPPT controller, a storage battery pack, an inverter, a transformer, and a relay. The photovoltaic array is connected to the input end of the MPPT controller, and the output end of the MPPT controller is connected with the storage battery pack. A terminal of the storage battery pack is connected with the input end of the inverter, and the output end of the inverter is connected with a primary winding of the transformer. The secondary winding of the transformer is connected with a load or a power grid through the relay. Through the changing of the control strategy, the integrated machine completes functions of commercial power complementation and controllable commercial power current. Compared with a control inversion integrated machine sold in a market, the integrated machine greatly reduces the hardware cost, integrates MPPT charging, an inverter and the commercial power complementation into one body, is simple and convenient for operation, is high in reliability, is strong in anti-interference capability, is high in efficiency, is high in electromagnetic compatibility, is easy to install, and is easy to maintain.

Description

technical field [0001] The invention relates to the technical field of power electronic power conversion, in particular to a mains complementary photovoltaic control inverter integrated machine and its control strategy. Background technique [0002] With the consumption of non-renewable energy such as petroleum, the utilization of solar energy as a new energy has been paid more and more attention. In areas without electricity, areas with unstable power, areas with high power requirements, or areas with strong awareness of energy conservation and environmental protection, solar energy is the preferred energy source. [0003] In order to realize the function of charging the battery by the mains electricity, the control and inverter integrated machine currently on the market uses a multi-winding transformer. By monitoring the battery voltage in real time, the transformer winding on the grid side is switched according to the battery voltage to change the charging voltage on the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02S40/32H02J9/06
CPCH02J3/385H02J9/061H02J9/068H02S40/32Y02B10/70Y02E10/56
Inventor 胡存刚姚培赵龙罗亚桥
Owner ANHUI UNIVERSITY