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

An energy conversion system and voltage technology, applied in photovoltaic power generation, photovoltaic modules, electrical components, etc., can solve problems such as damage to semiconductor devices, large voltage stress, etc., to reduce large voltage pressure, reliable grid-connected power generation, and alleviate technical problems. Effect

Inactive Publication Date: 2015-12-16
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 method of operation thereof, photovoltaic power generation system
  • Energy conversion system and method of operation thereof, photovoltaic power generation system
  • Energy conversion system and method of operation thereof, 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 to handle transient events or transient events that occur during grid-connected power generation of the energy conversion system or encounter a fault condition or in the subsequent recovery process The phase jump problem encountered. The so-called "phase jump compensation" here means that when 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 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 disturbances on the power grid side, for example, frequency events or phase events that occur in the power grid. More specifically, in one embodiment, the phase jump compensation mechanism described herein is implemented in combination with a v...

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Abstract

The invention discloses an energy conversion system, an operating method thereof, and a photovoltaic power generation system. The energy conversion system includes a DC bus, a converter module, and a converter control module. The DC bus receives DC power from the power supply. The converter module converts the DC power on the DC bus into AC power. The converter control module generates a phase angle command signal based on the power command signal and the power feedback signal. The converter control module generates a phase jump correction signal based on the detected grid voltage when a transient event occurs, and adjusts the phase angle command signal based on the phase jump correction signal. The converter control module generates a control signal based on at least the adjusted phase angle command signal, so that the converter module drives the AC voltage output from the converter module under the action of the control signal when a transient event occurs. Maintain synchronization with grid voltage. The invention also discloses a converter control system, a method for controlling the operation of an energy conversion system and a photovoltaic power generation system.

Description

Technical field [0001] The disclosed embodiments of the present invention relate to an energy conversion system and method to provide electrical energy to the power system, and in particular to a phase compensation mechanism and method of the energy conversion system. Background technique [0002] Basically, throughout the world, the share of electricity generated by renewable energy power generation systems, such as photovoltaic power generation systems, is becoming more and more significant. A general photovoltaic power generation system includes one or more photovoltaic arrays, each of which includes a plurality of interconnected photovoltaic cell units, which can convert solar radiant energy into direct current electrical energy. 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] The existing ...

Claims

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Application Information

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