Distributed power generation system architecture and control method thereof

A technology of distributed power generation and system architecture, which is applied in the direction of control/regulation system, electrical components, and regulation of electrical variables, etc. It can solve the problems of system reliability and safety reduction, restricting the performance of DC module architecture, and difficult system expansion and control. , to achieve the effects of strong expansion and redundancy capabilities, improved system reliability, and low cost

Inactive Publication Date: 2019-06-21
GPOWER SEMICON
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  • Claims
  • Application Information

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Problems solved by technology

These architectures generally have defects such as complex connections, low efficiency, difficulty in system expansion and control, and high cost, which seriously restricts the further improvement of the performance of the DC module architecture of the distributed power generation system.
In addition, in these architectures, the voltage at the DC bus is generally as high as 380V to adapt to the inverter output of the subsequent stage, which will greatly reduce the reliability and safety of the system

Method used

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  • Distributed power generation system architecture and control method thereof
  • Distributed power generation system architecture and control method thereof
  • Distributed power generation system architecture and control method thereof

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specific Embodiment

[0043] see figure 1 , this embodiment provides a distributed power generation system architecture 10, including a plurality of DC modules 100, a low-voltage DC bus 200, and a step-up high-gain inverter 300, each DC module 100 includes a distributed power supply 110 and The bidirectional DC converter 130, the output terminal of the distributed power supply 110 is connected to the input terminal of the bidirectional DC converter 130, the output terminal of the bidirectional DC converter 130 is connected to the low-voltage DC bus 200, and the step-up high-gain inverter 300 The input end is connected to the low-voltage DC bus 200 , and the output end of the step-up high-gain inverter 300 is used to connect to the grid 20 .

[0044] In this embodiment, the number of DC modules 100 is 3, and of course it is not limited thereto. Here, the number of DC modules 100 can also be 4 or 5, etc., and the specific number is determined by the total system The rated power is determined and is ...

no. 2 example

[0073] This embodiment provides a control method for a distributed power generation system architecture 10, which is applicable to the distributed power generation system architecture 10 provided in the first embodiment, wherein the basic structure and principle of the distributed power generation system architecture 10 and the resulting technical effects Same as the first embodiment, for the sake of brief description, for parts not mentioned in this embodiment, reference may be made to the corresponding content in the first embodiment.

[0074]The distributed power generation system architecture 10 includes a DC module 100, a low-voltage DC bus 200, and a step-up high-gain inverter 300. The DC module 100 includes a distributed power supply 110 and a bidirectional DC converter 130. The output terminal of the distributed power supply 110 It is connected to the input terminal of the bidirectional DC converter 130, the output terminal of the bidirectional DC converter 130 is conne...

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Abstract

The invention provides a distributed power generation system architecture and a control method thereof and relates to the technical field of power electronics. A preceding stage of the distributed power generation system architecture adopts a bidirectional direct current converter, a backward stage adopts a boost type high-gain inverter, the bidirectional direct current converter and the boost type high-gain inverter are respectively connected on a low voltage direct current bus, and the distributed power generation system architecture has both the advantages of a series direct current modulararchitecture and the advantages of a parallel direct current modular architecture. Meanwhile, a voltage class of the direct current bus is lowered, security of a system is improved, and cost of the system is further reduced. Besides, the invention also provides a related control strategy of the distributed power generation system architecture, and by virtue of a way of controlling different loadsin different modes, a voltage value of the low voltage direct current bus of the system can be monitored in real time, so that the backward stage inverter can not be damaged due to overload operation, and reliability of the system is improved.

Description

technical field [0001] The present invention relates to the technical field of power electronics, in particular, to a distributed power generation system architecture and a control method for the distributed power generation system architecture. Background technique [0002] Renewable energy distributed power generation is not limited by energy resources, raw materials and application environment, and does not produce pollutants. Therefore, it is of great significance to alleviate the pressure of energy crisis and environmental pollution, and has become the most developed renewable energy technology in the world. one. [0003] The traditional architecture of distributed power generation system mainly includes three types: centralized type, string type and multi-string type. In these architectures, distributed power sources are connected together in series or in parallel, which will lead to a serious reduction in system conversion efficiency of distributed power sources when...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02M3/158H02M7/5387
Inventor 胡茂朱永生裴轶
Owner GPOWER SEMICON
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