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A voltage stabilization system and its control method applied to new energy power generation and electric vehicle swap station

A technology for electric vehicles and power generation systems, which is used in the integration of power network operating systems, information technology support systems, and AC network voltage adjustment. It can solve problems such as time-consuming and achieve the effect of ensuring power supply.

Active Publication Date: 2016-08-24
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As far as current technology is concerned, it takes a lot of time to charge a battery

Method used

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  • A voltage stabilization system and its control method applied to new energy power generation and electric vehicle swap station
  • A voltage stabilization system and its control method applied to new energy power generation and electric vehicle swap station
  • A voltage stabilization system and its control method applied to new energy power generation and electric vehicle swap station

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Embodiment Construction

[0039] The present invention will be further explained below in conjunction with the accompanying drawings.

[0040] Such as figure 1 As shown, a voltage stabilization system applied to new energy power generation and electric vehicle replacement stations, the new energy power generation system outputs single-phase alternating current. The voltage stabilization system includes a single-phase voltage source inverter module, an LC low-pass filter, an isolation transformer, a PWM rectifier module, and an electrolytic capacitor C dc . The AC side of the inverter module is connected to an LC low-pass filter, one end of the capacitor C of the LC low-pass filter is connected to the inductor L, and the other end of the capacitor C is connected to one end of the primary side of the isolation transformer. The other end of the primary side of the isolation transformer is grounded, and the secondary side of the isolation transformer is connected to the input end of the power station sy...

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Abstract

The invention discloses a voltage stabilization system applied to new energy power generation and electric vehicle battery replacement stations. The voltage stabilization system mainly aims at solving the problem of instability of new energy power generation in a micro grid and guaranteeing stable operation of key loads, so that fluctuation (more than + / - 15%) of input voltages is transferred to non-key loads (such as electric vehicle battery replacement stations). By the adoption of the battery replacement stations, the problem of time consumption in the charging process of electric vehicles can be effectively solved. New energy power generation systems and the electric vehicle battery replacement stations are connected innovatively, a voltage stabilization device serves as a key link, it can be guaranteed that voltages of the key loads are stable, energy supply to the battery replacement stations can be reduced when the generating capacity is small, redundant energy can be supplied to a battery replacement station system when the generating capacity is large, and the defect of instability of regenerative energy power generation is overcome. The voltage stabilization system is high in practical value and easy to popularize, battery replacement stations for electric vehicles can be established at the same time at locations (such as hospitals with the new energy power generation systems) of the key loads.

Description

technical field [0001] The invention belongs to the technical field of power grid operation control and electric vehicle replacement station, and relates to a voltage stabilization system and method applied to new energy power generation. Background technique [0002] With the continuous advancement of new energy power generation technology, its grid-connected capacity is increasing year by year, and its impact on the power system is becoming more and more obvious, such as harmonic pollution, voltage fluctuations, and frequency flicker. Large-scale power grids have a certain self-regulation ability for voltage fluctuations, but for small isolated micro-grids, the instability of renewable energy such as wind energy and solar power sometimes cannot meet the power demand of all loads, resulting in grid voltage Fluctuations, such fluctuations will have adverse effects on electrical equipment, and even damage key electrical equipment. For example, the medical equipment used by t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/14H02J3/28
CPCY02B70/3225Y04S20/222
Inventor 程明王青松
Owner SOUTHEAST UNIV
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