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Electrical load dispatching method and device and load dispatching controller

A technology of electricity load and scheduling method, which is applied in the direction of AC network voltage adjustment, power network operating system integration, information technology support system, etc. , to achieve the effect of improving orderliness and safety and alleviating large peak loads

Inactive Publication Date: 2018-11-23
QINGDAO TELD NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the 7kW single-phase AC charging pile has solved the problem of electric vehicle charging in residential areas to a certain extent, with the access of large-scale single-phase AC charging piles, it has brought more negative impacts on the power supply and distribution network in residential areas:
[0004] First, compete with residential areas for loads, and the power grid has a large load
The charging of the owners is mostly concentrated in the peak period of electricity consumption (7:00 p.m. to 6:00 a.m.). The connection of a large number of charging loads causes problems such as large peak loads in residential areas and overloading of the power grid, which aggravates the safety hazards of the power grid in residential areas
[0005] Second, the capacity of the power grid is limited, and the investment in capacity expansion and transformation is large
Under the premise of not considering the increase in charging demand for subsequent electric vehicle mileage and battery capacity, according to the reserved capacity of 7kW / pile, only owner charging puts forward extremely high requirements on the transformer capacity in residential areas. In the future, traditional power transformation and distribution in residential areas will inevitably be carried out. Capacity upgrading and transformation, including the area of ​​power distribution room, etc. need to be re-planned, and the investment in the power grid is huge
[0006] Third, increase the loss of power supply lines and increase the safety hazards of residents' electricity consumption, etc.
Most of the charging in residential areas is a single-phase AC load. Due to the uncertainty of owner charging and the three-phase unbalance of electricity consumption in residential areas, in severe cases, the line loss caused by zero point drift is 1.25 to 5 times that of the balanced state. Such loss of power supply lines has greatly increased the hidden dangers of electricity safety in residential areas

Method used

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  • Electrical load dispatching method and device and load dispatching controller
  • Electrical load dispatching method and device and load dispatching controller
  • Electrical load dispatching method and device and load dispatching controller

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Such as figure 1 As shown, it is a flow chart of a method for dispatching electric loads provided by an embodiment of the present invention. The method is applied to a load dispatching controller, and is composed of figure 1 It can be seen that the power load scheduling method includes the following steps:

[0036] Step S102: Obtain the power value and current available charging margin of each charging device requesting charging in the target local area grid.

[0037] Here, the charging device may be but not limited to a car charging pile.

[0038] In one of the possible implementation manners, the allowable upper limit value of transformer power and the current total load value of power consumption in the target local area grid can be acquired, and then The load value calculates the current available charging margin.

[0039] In order to obtain the total power load value in the target local area grid in real time, in some embodiments, before obtaining the step of ob...

Embodiment 2

[0056] On the basis of Embodiment 1, the embodiment of the present invention introduces the implementation of a load scheduling strategy for controlling the opening and closing of each charging device, so as to better understand the power load scheduling method provided by the present invention. The specific content is introduced as follows.

[0057] Taking the electricity load scheduling in a residential area as an example, the load scheduling strategy provided by this embodiment follows the scheduling principles of "load constraints, queuing charging, timing priority, and minimum breach of contract" to ensure the maximum utilization of transformer capacity.

[0058] First of all, the scheduling principle of load constraints is realized through the following methods: real-time monitoring of the electricity load in residential areas, calculation of the charging margin, monitoring whether the charging power is within the safe charging range, dynamically adjusting the charging pow...

Embodiment 3

[0070] see figure 2 , which is a schematic structural diagram of a power load dispatching device provided by an embodiment of the present invention, consisting of figure 2 It can be seen that the device includes an available charging margin acquisition module 21, a total power value calculation module 22 to be charged, a comparison module 23 and an opening and closing control module 24 connected in sequence, wherein the functions of each module are:

[0071] The available charging surplus acquisition module 21 is used to obtain the power value and the current available charging surplus of each charging device requesting charging in the target local area grid;

[0072] The total power value calculation module 22 to be charged is used to calculate the total power value to be charged according to the power value of each charging device;

[0073] A comparison module 23, configured to compare the total power to be charged with the available charging margin to obtain a comparison...

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PUM

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Abstract

The invention provides an electrical load dispatching method and device and a load dispatching controller, and relates to the technical field of power distribution control. The electrical load dispatching method comprises the following step of: acquiring a power value of each charging device which is requested to be charged in a target local area power grid and a currently available charging surplus amount; calculating a total power value to be charged according to the power value of each charging device; comparing the total power value to be charged and the available charging surplus amount to obtain a comparison result; and according to the comparison result, controlling the above charging devices on and off. According to the electrical load dispatching method and device and the load dispatching controller, the charging power of the local power grid can be dynamically adjusted, the problem of large peak load of a power grid is relieved, and the order and safety of electricity utilization are improved.

Description

technical field [0001] The invention relates to the technical field of power distribution control, in particular to an electric load scheduling method, device and load scheduling controller. Background technique [0002] Public substations in residential quarters are generally 60-80VA / m in residential areas 2 Configure transformers, and the power supply range of each public transformer is generally controlled within 10,000m 2 Around, the public transformer capacity is generally controlled within 800kVA or less. The basic power load in residential areas is dominated by single-phase AC loads, which mainly have problems such as power consumption uncertainty, large peak loads during peak power consumption periods, and three-phase imbalances. [0003] With the large-scale gathering of electric vehicles in residential areas, a large number of AC charging facilities will continue to be connected to the grid in residential areas, and the capacity of transformers in residential are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/14
CPCH02J3/14Y02B70/3225Y04S20/222
Inventor 于德翔赵长浩路文刚王冰贾怀宇倪键树
Owner QINGDAO TELD NEW ENERGY TECH CO LTD
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