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Core-based countermeasure network photovoltaic off-grid inverter circulating current suppression system

A circulating current suppression and inverter technology, applied in photovoltaic power generation, AC network circuit, single-network parallel feeding arrangement, etc., can solve problems such as inability to meet requirements, difficult to achieve dynamic adaptation, etc., to reduce grid pollution, staggered The effect of parallel circulating current suppression and efficiency improvement

Active Publication Date: 2019-01-08
恩沃新能源科技(上海)有限公司
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Problems solved by technology

This technology has topology, simple control, and mature control scheme. However, due to the limitation of the device itself, it is often difficult to achieve dynamic adaptation, and it cannot meet the requirements in occasions with high requirements for circulation suppression.

Method used

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  • Core-based countermeasure network photovoltaic off-grid inverter circulating current suppression system
  • Core-based countermeasure network photovoltaic off-grid inverter circulating current suppression system
  • Core-based countermeasure network photovoltaic off-grid inverter circulating current suppression system

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Embodiment Construction

[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] The nuclear-based countermeasure network photovoltaic off-grid inverter circulation suppression system provided by the present invention includes a circulation data acquisition system, which is used to collect the circulation existing between each inverter, and then send it to the controller , model and control in the controller, and finally drive the power electronic devices in the execution system of the present invention to suppress the circulating current. Its basic structure is as figure 1 shown. The control flow and control structure diagram are as follows: figure 2 shown.

[0025...

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Abstract

The invention relates to a circulating current suppression system of a photovoltaic off-grid inverter, in particular to a data-driven and kernel-based countermeasure network control method, the invention relates to Circulating current suppression system for interleaved parallel inverter and belongs to the intersecting technical field of power electronics, big data technology and control theory, inparticular to the core-based countermeasure network photovoltaic off-grid inverter circulating current suppression system, including data acquisition system, controller system and execution system. Collect the corresponding data of the circulation in the data acquisition system, the algorithm carries on the data analysis and the processing according to the collected data in the controller system,constructs the kernel-based countermeasure network to carry on the data analysis modeling and the control, and finally forms the control instruction signal; Circulation current is suppressed in the execution system according to the control command signal. The invention can effectively suppress the interleaved parallel circulating current of the photovoltaic off-grid inverter, improve the efficiency of the photovoltaic system to a certain extent, and reduce the public nuisance of the power grid.

Description

technical field [0001] The present invention relates to a circulation suppression system for photovoltaic off-grid inverters, in particular to a data-driven and nuclear-based countermeasure network control method based on a circulation suppression system for interleaved parallel inverters, which belongs to power electronics technology, big data The interdisciplinary technical field of technology and control theory, specifically the nuclear-based countermeasure network photovoltaic off-grid inverter circulation suppression system. Background technique [0002] In photovoltaic off-grid inverters, multiple inverters are usually interleaved and connected in parallel to increase their output power. However, due to factors such as the trigger delay difference and dead zone control of the power device itself, it is difficult to obtain a synchronous output voltage in the inverter parallel system, so there is a circulating current. Existing circulating current suppression techniques...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/383H02J2203/20Y02E10/56
Inventor 姚舜才任一峰陈昌鑫赵俊梅张文华
Owner 恩沃新能源科技(上海)有限公司
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