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Current transformer polarity adaptive method for photovoltaic inverter

A technology of current transformers and photovoltaic inverters, which is applied in the direction of instruments, measuring electricity, and measuring electrical variables, etc., can solve problems such as abnormal output power, uneven levels, and photovoltaic inverter malfunctions, and solve the problems of installation Effects of complexity, reduced workload, and increased adaptability

Active Publication Date: 2019-06-28
SHENZHEN KSTAR NEW ENERGY CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the actual production test and on-site construction personnel are uneven. If the polarity of the current transformer is wrongly connected, the photovoltaic inverter will malfunction or even fail to output power normally.

Method used

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  • Current transformer polarity adaptive method for photovoltaic inverter
  • Current transformer polarity adaptive method for photovoltaic inverter

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the description of the drawings and specific embodiments.

[0021] The components required for the installation of photovoltaic inverter 1 and current transformer 2 include: photovoltaic panel 6, photovoltaic inverter 1, load 5, AC connection unit 4, public power grid 3, current transformer 2 and wires, and the connection installation is as follows figure 2 As shown, the photovoltaic panel 6 and the load 5 are respectively connected to the photovoltaic inverter 1, the photovoltaic inverter 1 is connected to the public grid 3 through the AC connection unit 4, and the photovoltaic inverter 1 is connected to the public grid 3 through the current transformer 2. Firewire connection.

[0022] Such as figure 1 As shown, a current transformer polarity adaptive method of a photovoltaic inverter provided by the present invention includes the following steps:

[0023] 1. Preset current transformer 2 direc...

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Abstract

The invention provides a current transformer polarity adaptive method for a photovoltaic inverter. The method comprises the following steps: S1, presetting a current transformer direction; S2, storingcurrent and grid voltage information collected by a current transformer; S3, carrying out grid connection of a photovoltaic inverter and outputting power; S4, storing current and grid voltage information collected by the current transformer; S5, comparing the current and grid voltage information stored by the S2 and S4 to obtain the polarity of the current transformer; and S6, storing the polarity of the current transformer. The method has the beneficial effects that: operation is simple, the adaptability of the current transformer is enhanced, the workload is reduced, and a problem of complicated installation of the current transformer is effectively solved.

Description

technical field [0001] The invention relates to a polarity adaptive method of a current transformer, in particular to a polarity adaptive method of a current transformer of a photovoltaic inverter. Background technique [0002] Since the anti-backflow function of the photovoltaic inverter has specific configuration requirements for the polarity of the current transformer, it is necessary for production testing and on-site construction personnel to wire according to a specific wiring method. The operation steps are cumbersome and waste manpower and material resources, which is not convenient for production testing and Site construction. However, the actual production test and on-site construction personnel are uneven. If the polarity of the current transformer is wrongly connected, the photovoltaic inverter will malfunction or even fail to output power normally. [0003] Therefore, how to overcome the defect that the existing photovoltaic inverter current transformer is comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/06
Inventor 杜成瑞张志强刘超群刘程宇林华
Owner SHENZHEN KSTAR NEW ENERGY CO LTD
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