Standardized current conversion device of electric vehicle and distributed power source

Abstract

The invention discloses a standardized current conversion device applicable to an electric vehicle and a distributed power source to be accessed to a public power distribution network. The traditional distributed power source can not be effectively isolated from the power network, the requirements of high-end users for power quality can not be ensured, and power users with severe pollution can not be prevented from injecting power into the power network. The standardized current conversion device comprises a power network side module, a user side module, an electric vehicle charging and discharging module and a controller, wherein the network side module is connected with the electric vehicle charging and discharging module in parallel and then is connected with the power network side module in series; a trigger pulse signal generated by the controller is transmitted to the power network side module, the user side power module and the electric vehicle charging and discharging module through optical fibers, the controller communicates with a background server through Ethernet, and a background monitoring software module is installed in the background server. The invention can realize the effective isolation of the distributed power source and the power network and can also combines the functions of dynamic reactive compensation, fault current limitation, power quality control and the like.

Description

technical field [0001] The invention relates to the field of power supply and utilization, in particular to a standardized converter device for electric vehicles and distributed power sources. Background technique [0002] With the continuous expansion of the grid scale, the disadvantages of large-scale power systems are becoming more and more prominent, such as high cost, inflexible operation control, difficulty in adapting to the increasingly high reliability requirements of users, inability to flexibly track load changes and diversified electric energy Quality needs. Scholars began to study the development model of the future power system. Obviously, simply expanding the scale of the power grid cannot meet the requirements. Therefore, European and American power experts proposed a distributed power grid with less pollution, high reliability, low investment, flexible power generation methods, and compatibility with the environment. The way of joint operation of power gene...

AI Technical Summary

Problems solved by technology

[0004] (1) Operation control: The scheduling and operation of distributed power sources are controlled by the property owners of the power sources, which cannot be effectively regulated

[0005] (2) Output power fluctuations: The active input of distributed power sources using wind energy and solar energy has natural volatility, so the output power of distributed power sources fluctuates greatly, and the degree of uncertainty is high, which is likely to cause flicker due to grid voltage fluctuations

[0006] (3) Harmonic pollution: Distributed power sources often use rectification and inverter devices to connect to the power grid, which will output a large number of multiple harmonic currents to the power grid

[0009] (1) Loads sensitive to power quality: such as semiconductor production plants, paper mills, etc., if the voltage drops for tens of milliseconds, the production equipment will not work normally and a large amount of waste products will appear

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