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Modularized ISOS inverter system

An inverter and modularization technology, applied in the field of modular ISOS inverter system and inverter system, can solve problems such as flexibility and reliability limitations, and achieve the effect of simplifying loop design and realizing modularization

Inactive Publication Date: 2014-01-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the IPOP combined system, the centralized control strategy limits the flexibility and reliability of the system, but the distributed control strategy can solve these problems

Method used

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  • Modularized ISOS inverter system
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  • Modularized ISOS inverter system

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Embodiment Construction

[0020] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0021] The main circuit topology of the modular ISOS inverter system of the present invention is shown in Figure 1(a), including a power supply circuit and n inverter modules, and the power supply circuit includes an input source V in and n input divider capacitors C d1 ~C dn , n input voltage divider capacitors C d1 ~C dn connected in series and then connected in parallel to the input source V in Between the positive and negative input terminals of the n inverter modules, the input terminals of the n inverter modules are connected in parallel to the two ends of the corresponding input voltage dividing capacitors, and the positive output terminal of the 1# inverter module is connected to the n# inverter module through the load If i=2,3,...,n, the positive output terminal of the i#th inverter module is connected to the negative output terminal of the...

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Abstract

The invention discloses a modularized ISOS inverter system, and belongs to the field of direct-current and alternate-current converters of an electric energy conversion device. The modularized ISOS inverter system comprises n inverter modules which are in series connection in input and output, wherein n is an integer larger than or equal to 2. The modularized ISOS inverter system further comprises a communication bus respectively connected with the n inverter modules, wherein communication is achieved through an output voltage reference bus, an input voltage-sharing bus, an output voltage-sharing bus and a public current reference bus, each inverter module is provided with three independent control loops which include an output voltage ring, an input voltage-sharing ring and a current inner ring, and the three loops function in a matched mode, so that input voltage sharing and output voltage sharing of the inverter system are achieved. Voltage-sharing control circuits are scattered in the modules respectively, each module can become a standard module which can work independently, the modules of different quantities can be combined in a series connection mode, communication between the modules can be achieved through the buses and real modularization is achieved.

Description

technical field [0001] The invention relates to an input series output series (ISOS) inverter system, in particular to a modular ISOS inverter system, which belongs to the field of DC-AC converters of electric energy conversion devices. Background technique [0002] As an important branch of power electronic system integration, the series-parallel combination system of standardized modules adopts the series-parallel combination connection method, and can obtain flexible and arbitrary input and output from multiple standardized modules with low power and low voltage (input and output) performance power conversion system. Among them, the input series inverter system (including ISOP and ISOS inverters), because its input terminal adopts series structure, the input voltage of each module will be reduced to the original 1 / n (n is the number of modules), which is easier With proper selection of switching devices, it is very suitable for many high DC input voltage applications. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48
Inventor 方天治朱恒伟阮新波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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