Distribution method for adjusting three-phase imbalance of direct-current charger

A distribution method, DC charging technology, applied in charging stations, electric vehicle charging technology, multi-phase network asymmetry reduction, etc., can solve the problems of not being able to utilize the potential of the charger for charging times, and not taking into account the difference in charging times, etc.

Active Publication Date: 2020-02-07
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0004] This application provides a distribution method for adjusting the three-phase unbalance of DC chargers, which solves the problem that the prior art method does not take into account the difference in charging times within the same time period, and cannot utilize the potential of chargers with fewer charging times. technical problem

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  • Distribution method for adjusting three-phase imbalance of direct-current charger
  • Distribution method for adjusting three-phase imbalance of direct-current charger
  • Distribution method for adjusting three-phase imbalance of direct-current charger

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[0028] The embodiments will be described in detail hereinafter, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples do not represent all implementations consistent with this application. These are merely examples of systems and methods consistent with aspects of the present application as recited in the claims.

[0029] see figure 1 The distribution method for adjusting the three-phase unbalance of DC chargers includes multiple DC chargers connected in series with the power grid, each of which is equipped with a controller, and the transmission lines of adjacent DC chargers are connected to useful power users. Multiple controllers are electrically connected to the central controller, and the distribution methods include:

[0030] S1: Co...

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Abstract

The invention discloses a distribution method for participation of a direct-current charger in three-phase imbalance adjustment, relates to the technical field of power distribution network power adjustment methods, and solves the technical problem that a method in the prior art cannot effectively exert the utilization potential of a charger with less charging times. The method comprises the following steps of: S1, calculating compensation currents of a plurality of unbalanced load points; S2, inputting a statistical time period into a central controller, transmitting the statistical time period to the plurality of charging controllers, counting the charging times of the plurality of direct current chargers, and determining distribution coefficients of the plurality of direct current chargers; S3, allocating weights to an unbalanced current required to be compensated by a final-stage direct-current charger; and S4, in the input time period, performing distribution adjustment on the direct current charger by the central controller, and finishing the control process until the expected effect is achieved. According to the method, the difference of charging times in the same period isconsidered, and the utilization potential of the charger with less charging times is brought into play to the greatest extent.

Description

technical field [0001] The technical field of the grid equipment adjustment method of the present invention is, in particular, a distribution method for adjusting the three-phase unbalance of a DC charger. Background technique [0002] At present, the domestic electric vehicle industry is currently developing vigorously, and the DC charging pile is more optimistic in the market because it can quickly replenish electric energy. However, since the charging task of the DC charger is not full, it can make full use of its idle capacity to complete the distribution network feeder. Three-phase unbalanced treatment. The DC charging control method proposed in the "DC charging control method taking into account three-phase imbalance control" in the prior art is to collect the current data of the distribution network feeder at different points, and coordinate and control the operation of multiple DC chargers, thereby Realize the compensation for the three-phase unbalanced current of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26B60L53/67B60L53/63
CPCH02J3/26B60L53/67B60L53/63Y02T10/70Y02T10/7072Y02T90/12Y02E40/50
Inventor 严玉廷杨洋苏适陆海
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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