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Power grid load transfer method based on global search

A global search and power grid load technology, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as load reduction and supply, and achieve the effect of ensuring safe and stable work and improving management and control capabilities

Active Publication Date: 2017-11-07
STATE GRID ZHEJIANG ELECTRIC POWER +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a power grid load transfer method based on global search, solve the current load reduction problem caused by equipment overload and failure, and realize load transfer under failure

Method used

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  • Power grid load transfer method based on global search
  • Power grid load transfer method based on global search

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specific Embodiment

[0040] Such as figure 2 As shown, the 220KV main bus of Cixi Substation is powered by Hexi 4P68 line, and the 220KV auxiliary bus of Cixi Substation is powered by Heci 4P67 line. When the Hexi 4P68 line fails, the 220kV main bus of Cixi Substation loses voltage, resulting in the 220KV main bus of Cixi Substation Load reduction.

[0041] Using the load transfer method based on global search described in the present invention, a load transfer plan is given: 1. Close the Puci 2313 line, and transfer the load of the 220KV positive bus of Cixi Substation to the 220KV positive bus of Songpu Substation; 2. Close the 220KV bus tie switch of Cixi Substation, and transfer the load of the 220KV main busbar of Cixi Substation to the 220KV auxiliary busbar of Cixi Substation.

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Abstract

The present invention discloses a power grid load transfer method based on global search, comprising the following steps: step 1: acquiring grid model data and state estimation data, and based on the grid model data and the state estimation data, making a grid equivalent to an undirected weighted graph; step 2: calculating the bus maximal power supply capability; step 3: searching for the feasible load transfer path of a bus according to the grid model data and the state estimation data acquired in the step 1; and step 4: acquiring the information of a lost-voltage bus, and obtaining the feasible load transfer path of the lost-voltage bus according to the feasible load transfer path of the bus obtained in the step 3 as a final load transfer scheme. The method can find the feasible transmission line load transfer route and the bus coupler switch load transfer route after the occurrence of voltage loss in the substation bus, can quickly and effectively formulate the load transfer scheme under the voltage loss of the substation bus, and can improve the control capability of the dispatcher for the power grid to protect the security and stability of the power grid.

Description

technical field [0001] The invention relates to the field of intelligent dispatching of power grids. Background technique [0002] In recent years, with the continuous growth of my country's national economy, the demand for electricity in all walks of life has increased rapidly. However, due to the relatively lagging construction of urban power grids, problems such as unreasonable grid structures have become more prominent, which makes it difficult to meet users' needs for electricity. quality, power supply reliability, etc. Especially due to the rise of the tertiary industry, the structure of power load has also changed. The proportion of small and medium-sized users, including residents, has increased year by year, resulting in longer and longer lines in urban power distribution systems, more and more nodes, and increasingly complex structures. The more complex it is, the greater the probability of failure. [0003] When the power grid fails, the faulty equipment needs to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/0073
Inventor 杨才明朱炳铨项中明章立宗吴华华罗刚徐立中谢栋郑翔钱一宏郭创新金渊文杨华王芳童雪萍杨剑峰曹煜陈哲王惠如
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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