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Z source power transformation based photovoltaic network inverter

A technology of inverter device and source power, which is applied in the direction of photovoltaic power generation, adjustment of electrical variables, single-network parallel feeding arrangement, etc., can solve problems such as increase of output current harmonics, influence of device service life, damage to devices, etc., and achieve improvement The effect of reliability, small size of the device, and stable driving

Inactive Publication Date: 2007-12-05
SOUTHEAST UNIV
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AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the output current harmonics increase
At the same time, in actual use, there are still situations where various complex electromagnetic interferences lead to up and down straight-through, thus damaging the device and affecting the overall service life of the device

Method used

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  • Z source power transformation based photovoltaic network inverter
  • Z source power transformation based photovoltaic network inverter
  • Z source power transformation based photovoltaic network inverter

Examples

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Embodiment Construction

[0021] Referring to Figure 1, a photovoltaic grid-connected inverter device based on Z-source power conversion includes: power conversion main circuit 1, DSP measurement and control system 2 and IGBT drive module, DSP measurement and control system 2 is used to sample voltage and current signals, The PWM signal sequence with adjustable pulse width is obtained by calculation, and then converted by the IGBT drive module into a signal that can directly drive the IGBT. The power conversion main circuit 1 includes a solar cell array 11, a Z source impedance network 12, an inverter network 13 and a filter reactor 14 , the two output ends of the solar cell array 11 are respectively connected to the two input ends of the Z source impedance network 12, the two output ends of the Z source impedance network 12 are respectively connected to the two input ends of the inverter network 13, and one output of the inverter network 13 One end of the filter reactor 14 is connected to one end of th...

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Abstract

The invention publishes a light bend combined network transformation installment which based on the Z source power transformation, including: the power transform main return route, the DSP observation system and the IGBT actuation module, the DSP observation system is used in sampling of the voltage, the electric current signal, and operates to obtain the PWM signal sequence with the adjustable pulse width, again transforms the IGBT actuation module into the direct drive IGBT signal, the power transform main return route includes the solar cell array, the Z source impedance network, the contravariant network and the filter reactor, the two out-ports of the solar cell array separately connects with the two input end of the Z source impedance network, the two out-ports of the Z source impedance network separately connects with the two input end of the contravariant network, a out-port of contravariant network connects to a end of filter reactor, a end of the filter reactor is used to connect the end of the electrical network, the another out-port of the contravariant network is used to connect the another end of the electrical network directly, the direct drive IGBT signal which is transformed by the above IGBT actuation module is used in realizing the contravariant network lead and shutdown.

Description

technical field [0001] The invention belongs to inverter grid-connection technology, and relates to a power conversion and measurement control system for distributed new energy grid-connected power supply, in particular to a photovoltaic grid-connected inverter device based on Z-source power conversion. Background technique [0002] The development of economy and society has made people's demand for energy continue to rise. The traditional energy utilization structure dominated by non-renewable energy such as petroleum can no longer meet the needs of sustainable social and economic development; on the other hand, the use of traditional energy has serious environmental pollution. question. In stark contrast to traditional energy sources, renewable energy power generation represented by solar energy is clean, pollution-free and inexhaustible. Therefore, making full use of renewable energy to generate electricity and improving the structure of energy utilization is an importan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38G05F1/67
CPCY02E10/58Y02E10/56
Inventor 郑建勇梅军张先飞袁玲盛立健于明辉刘顺炮
Owner SOUTHEAST UNIV
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