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Electric vehicle charger electrical energy integrated monitoring system

A technology of electric vehicles and monitoring systems, which is applied to measuring devices, measuring electrical variables, instruments, etc., and can solve problems such as uneven performance parameters

Inactive Publication Date: 2015-06-10
李小孟
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the in-depth research on many aspects of electric vehicle chargers at home and abroad, a variety of charger products have appeared on the market, and their performance parameters are uneven. There is no test system with full functions and high accuracy to test chargers. Provide a full set of test data for the development, testing and maintenance of

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  • Electric vehicle charger electrical energy integrated monitoring system

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Embodiment Construction

[0007] The actual load carried by the electric vehicle charger is usually a non-linear load, and in the three-phase low-voltage power distribution system that supplies power to the charger, the grid voltage is often asymmetrical and distorted. Aiming at the inaccurate detection of reactive power and harmonics caused by the unbalanced voltage of the low-voltage power distribution system in the low-voltage power distribution system of the electric vehicle charger, an improved i p -i q A composite detection method combining reactive power detection algorithm and adaptive harmonic current frequency division detection algorithm.

[0008] use the improved i p -i q The algorithm realizes the reactive power detection of the charger under unbalanced voltage, and detects the harmonic currents of the three-phase side of the charger through the adaptive harmonic current frequency division detection method. Three-phase voltage e a , e b , e c , three-phase current i a , i b , i c ...

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Abstract

The invention discloses an electric vehicle charger electrical energy integrated monitoring system comprising a three-phase alternate-current program control module, an alternate-current measurement analysis module, a direct-current measurement analysis module, a direct-current simulation load and an industrial personal computer. According to the reactive current and harmonic current of alternate current measurement, a composite detection method adaptive to the unbalanced supply voltage is provided.

Description

technical field [0001] The invention belongs to a charging machine electric energy integrated monitoring system and belongs to the field of motor control. Background technique [0002] With the gradual depletion of traditional fossil fuels such as oil and natural gas and the increasingly serious pollution of automobile exhaust, governments, major automobile companies, and scientific research institutes have all stepped up research and development of electric vehicles. With the breakthrough of the key technology of the electric vehicle itself, the construction project of the supporting electric vehicle charging station has also begun to be piloted and gradually promoted. The off-board charger is the core equipment of the charging station, which can quickly charge the electric vehicle. Some studies have established single and multiple charger capacity demand analysis models based on the capacity demand of the electric vehicle charging system. With the advancement of detectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R22/06
Inventor 李小孟
Owner 李小孟