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An Intelligent Search Algorithm for Real-time Voltage Regulation of Flexible Loads

A flexible load and intelligent search technology, applied in AC network voltage adjustment, mechanical equipment, combustion engines, etc., can solve the problem of adjusting flexible load regardless of whether the nodes are available, so as to reduce new construction and maintenance, and maintain safe and stable operation Effect

Active Publication Date: 2022-05-17
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the voltage sensitivity coefficient method does not consider whether the node has a flexible load that can be adjusted, and its voltage adjustment is the adjustment of all nodes, not the voltage adjustment of the node whose voltage exceeds the limit

Method used

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  • An Intelligent Search Algorithm for Real-time Voltage Regulation of Flexible Loads
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  • An Intelligent Search Algorithm for Real-time Voltage Regulation of Flexible Loads

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Embodiment Construction

[0049]Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so as to describe the content of the present invention more clearly and completely. However, it should be noted that the described embodiment is only one embodiment of the present invention, not all embodiments.

[0050] see figure 1 , which is a schematic diagram of the power adjustment of flexible loads participating in the real-time voltage control of the distribution network. The node voltage can be adjusted by changing the active power and reactive power on the user side.

[0051] see Figure 2-5 , undervoltage is the lower limit of the voltage lower than the specified value; overvoltage is the upper limit of the voltage higher than the specified value. When the voltage of the nodes in the distribution network is lower than the lower voltage limit or higher than the upper voltage limit, the flexible loads in each node are searched, and the voltage ...

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Abstract

The invention discloses an intelligent search algorithm applied to real-time voltage regulation of flexible loads. The algorithm is designed based on the line voltage drop characteristics of a star distribution network, and includes the following steps: detecting the voltage of all nodes in the distribution network through real-time power flow calculation Voltage, sort the voltages from small to large; when a node undervoltage or overvoltage occurs, search for all adjustable flexible loads in the node, consider the breaking combination of all flexible load switches, and generate all power combinations from small to large list of. By adopting the technical scheme of the present invention, the minimum flexible load power combination is searched through the sorting of node voltages in the distribution network, and the user's load operation plan is minimally changed. Through the disconnection of the flexible load, the node voltage of the distribution network is controlled within a reasonable range. It solves the problem of voltage rise caused by a large number of distributed power generation connected to the grid and the problem of voltage drop caused by simultaneous charging of a large number of electric vehicles, and maintains the safe and stable operation of the distribution network.

Description

technical field [0001] The invention relates to the technical field of distribution network voltage control, specifically, an intelligent search algorithm applied to real-time voltage regulation of flexible loads. Background technique [0002] With the continuous development of the smart grid, the distribution network has also ushered in tremendous changes in recent years. Distributed generation systems of renewable energy, such as rooftop photovoltaic power generation, are increasingly loaded in the distribution grid. In a traditional distribution network, power flows flow from substations to end users. And when a large amount of surplus power from distributed generation is incorporated into the distribution network, the flow of the distribution network becomes a two-way flow. The surplus power will increase the voltage of nodes in the distribution network, and in severe cases, it will cause overvoltage. On the other hand, pure electric vehicles have developed rapidly in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/12H02J3/46
CPCH02J3/12H02J3/46H02J2203/20Y02T10/40
Inventor 谢强强申屠相镕华咏竹杨胜英
Owner HANGZHOU DIANZI UNIV
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