Polarity Adaptive Method of Current Transformer for Photovoltaic Inverter

A technology for current transformers and photovoltaic inverters, which is applied in electrical winding testing and other directions, can solve problems such as inability to output power normally, uneven levels, and malfunctions of photovoltaic inverters, so as to solve complex installation and reduce workload. , the effect of increasing adaptability

Active Publication Date: 2021-04-30
SHENZHEN KSTAR NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Polarity Adaptive Method of Current Transformer for Photovoltaic Inverter
  • Polarity Adaptive Method of Current Transformer 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 present invention provides a current transformer polarity adaptive method of a photovoltaic inverter, comprising the following steps: S1, preset the direction of the current transformer; S2, store the current collected by the current transformer and the information of the grid voltage; S3, The photovoltaic inverter is connected to the grid and outputs power; S4, storing the current collected by the current transformer and the information of the grid voltage; S5, comparing the information of the current and the grid voltage stored in steps S2 and S4, and obtaining the polarity of the current transformer; S6. Storing the polarity of the current transformer. The invention has the beneficial effects of simple operation, increased adaptability of the current transformer, reduced workload, and effectively solves the problem of complicated installation of the current transformer.

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 Patents(China)
IPC IPC(8): G01R31/72
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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