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Energy conversion system and operation method thereof and photovoltaic power generation system

An energy conversion system and conversion technology, applied in photovoltaic power generation, optical radiation generators, photovoltaic modules, etc., can solve problems such as large voltage stress, damage to semiconductor devices, etc., to reduce large voltage stress, reliable grid-connected power generation, The effect of mitigating technical problems

Inactive Publication Date: 2013-04-03
GENERAL ELECTRIC CO
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  • Abstract
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Problems solved by technology

And this reverse energy flow may damage the semiconductor devices in the energy conversion system, and make the DC bus of the energy conversion system bear a large voltage stress

Method used

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  • Energy conversion system and operation method thereof and photovoltaic power generation system
  • Energy conversion system and operation method thereof and photovoltaic power generation system
  • Energy conversion system and operation method thereof and photovoltaic power generation system

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Embodiment Construction

[0031] One or more embodiments disclosed in the present invention relate to a phase jump compensation mechanism, which is used to deal with a transient event or a transient event or a fault condition during the grid-connected power generation process of the energy conversion system or in the subsequent recovery process The phase jump problem encountered. The so-called "phase jump compensation" here means that in the case that the phase-locked loop circuit cannot quickly provide the phase information of the grid voltage, it can track the grid voltage in real time and provide the instantaneous phase information of the grid voltage for phase compensation . The so-called "transient or transient event" here refers to one or more events or conditions that cause signal disturbance on the grid side, for example, frequency events or phase events that occur in the grid. More specifically, in one embodiment, the phase jump compensation mechanism described herein is implemented in combin...

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Abstract

The invention discloses an energy conversion system and an operation method thereof and a photovoltaic power generation system. The energy conversion system comprises a direct-current bus, a converter module and a converter control module. The direct-current bus receives direct current from a power supply. The converter module converts the direct current on the direct-current bus into alternating current. The converter control module generates phase angle command signals according to power command signals and power feedback signals. The converter control module generates phase jump correction signals on the basis of detected network voltage when a transient event happens, and adjusts the phase angle command signals on the basis of the phase jump correction signals. The converter control module generates control signals at least on the basis of the adjusted phase angle command signals to ensure that the converter module drives the alternating voltage output by the converter module to be kept synchronous with the network voltage when the transient event happens under the action of the control signals. The invention also discloses a converter control system, a method for controlling operation of the energy conversion system, and the photovoltaic power generation system.

Description

technical field [0001] The embodiments disclosed in the present invention relate to an energy conversion system and method for providing electric energy to a power system, and in particular to a phase compensation mechanism and method of an energy conversion system. Background technique [0002] Basically, the share of electricity generated by renewable energy generation systems, such as photovoltaic power generation systems, is becoming more and more significant all over the world. A general photovoltaic power generation system includes one or more photovoltaic arrays, and each photovoltaic array includes a plurality of interconnected photovoltaic battery units, which can convert solar radiation energy into DC power. In order to realize the grid-connected power generation of the photovoltaic array, a converter module is usually used to convert the DC power generated by the photovoltaic array into AC power that can be transmitted by the grid. [0003] There are various type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/42H02J3/38H02J3/16H02N6/00H02S40/32
CPCY02E10/56Y02E40/30
Inventor 谭卓辉邬心慧邬雪琴公茂忠
Owner GENERAL ELECTRIC CO
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