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Control method and device of photovoltaic power generation system and photovoltaic power generation system

A technology of photovoltaic power generation system and control method, which is applied in the direction of photovoltaic power generation, circuit devices, electrical components, etc., and can solve problems such as photovoltaic power generation devices and energy storage devices are not considered, and the operation of photovoltaic power generation systems is not stable enough.

Active Publication Date: 2015-04-29
SUNGROW POWER SUPPLY CO LTD
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Problems solved by technology

[0004] However, in the control process of the photovoltaic power generation system, the photovoltaic power generation device and the energy storage device are not considered, which leads to the unstable operation of the photovoltaic power generation system

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  • Control method and device of photovoltaic power generation system and photovoltaic power generation system
  • Control method and device of photovoltaic power generation system and photovoltaic power generation system
  • Control method and device of photovoltaic power generation system and photovoltaic power generation system

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Embodiment Construction

[0087] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0088] The invention discloses a control method of a photovoltaic power generation system to realize efficient and stable operation of the photovoltaic power generation system. The photovoltaic power generation system in the present invention includes a photovoltaic power generation device, a DC / DC converter, an energy storage device and an inverter, wherein the electric energy generated by the photovoltaic power generation device can be stored in the energy st...

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Abstract

The invention discloses a control method of a photovoltaic power generation system. The method includes the step of determining the average active power and average reactive power of an inverter, the step of determining a first active instruction signal of the inverter according to the synchronous rotation angular frequency and output angular frequency of a virtual synchronous machine, the step of determining a second active instruction signal of the inverter by means of practical charge status and a charge status set value of an energy storage device, the step of working out the current output angular frequency of the virtual synchronous machine and integrating the current output angular frequency to obtain the output voltage phase angle of the virtual synchronous machine, the step of working out an output voltage reference signal of the inverter, and the step of combining the output voltage phase angle and the output voltage reference signal into a reference instruction vector of output voltage of the inverter and conducting closed-loop control on the inverter on the basis of the reference instruction vector. On the basis of the control method, integrated control over the photovoltaic power generation system is achieved, and the photovoltaic power generation system can run more efficiently and stably. The invention further discloses the photovoltaic power generation system and a control device thereof.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power generation, and in particular relates to a control method, a control device and a photovoltaic power generation system of a photovoltaic power generation system. Background technique [0002] With the continuous development of photovoltaic power generation technology, it has been widely used now. A new type of photovoltaic power generation system currently emerging includes a photovoltaic power generation device, a DC / DC converter, an energy storage device, and an inverter. The electric energy generated by the photovoltaic power generation device can directly supply power to the load and can be fed into the grid through the inverter. , can also be stored in the energy storage device through the DC / DC converter. [0003] The photovoltaic power generation system is greatly affected by the environment. When the light changes drastically, the output power of the photovoltaic power generati...

Claims

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Application Information

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IPC IPC(8): H02M7/48H02J3/38
CPCH02J3/383H02M7/48Y02E10/56
Inventor 刘芳张兴胡超余勇曹伟毛福斌
Owner SUNGROW POWER SUPPLY CO LTD
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