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Ultrashort-term planning method for power distribution network for smoothly switching under various running modes

A smooth switching and distribution network technology, applied in the direction of AC network load balancing, single-network parallel feeding arrangement, etc., can solve the problems of diverse power generation and consumption without unified inclusion, grid uncertainty, etc.

Pending Publication Date: 2019-06-11
ZHANGZHOU POWER SUPPLY COMPANY STATE GRID FUJIANELECTRIC POWER +1
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Problems solved by technology

At present, diverse power generation and consumption are not uniformly included in the distribution network planning structure, making the power grid more and more uncertain

Method used

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  • Ultrashort-term planning method for power distribution network for smoothly switching under various running modes
  • Ultrashort-term planning method for power distribution network for smoothly switching under various running modes

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Embodiment Construction

[0017] Please check figure 1 , a distribution network ultra-short-term planning method for smooth switching of multiple operating modes, which includes the following steps:

[0018] In step 1, the distribution network is decomposed into several small-scale and mutually independent micro-grids according to the transmission lines of the distribution network; in this embodiment, the distribution network forms each micro-grid with new energy in units of stations. For example, taking each 10kV to 400V transformer station as a node, the line under a 10kV to 400V transformer is a microgrid with new energy in it.

[0019] Step 2, collect the information of each energy node and load node on the distribution network line, predict the load curve of the microgrid in a future cycle in the short term according to the historical load, and predict a future cycle (the cycle The duration can be set as the power generation curve of new energy (photovoltaic, wind power, hydropower) within seven ...

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Abstract

The invention discloses an ultrashort-term planning method for a power distribution network for smoothly switching under various running modes. The ultrashort-term planning method comprises the following steps of 1, decomposing the power distribution network into a plurality of small-scale microgrids independent to each other according to a power transmission line of the power distribution network; 2, acquiring information of each energy source and each load node on the power distribution network line, judging whether new energy in each microgrid can conform to internal power demand of the microgrid or not, if not, calculating electric quantity needed to be provided by a power supply company, and returning remaining quantity to an upper-stage power distribution network of the microgrid toform a planning result of the microgrid if the microgrid can be self-sufficiency and has certain remaining quantity; and 3, summarizing the planning result of each microgrid to form a planning resultof a regional power distribution network. The ultrashort-term planning method has the following advantages that the running safety and reliability of the power distribution network is ensured, the load conversion capability of the power distribution network is improved, and the power-failure rate of a power distribution load end is reduced.

Description

technical field [0001] The invention relates to an ultra-short-term planning method for a distribution network with smooth switching of multiple operating modes. Background technique [0002] With the development of new energy, distributed photovoltaic applications are becoming more and more common; at the same time, with the application of battery technology, energy storage systems, electric vehicles, etc. are also commonly used; Use the grid. At present, the diverse power generation and consumption are not uniformly included in the distribution network planning structure, which makes the power grid more and more uncertain. Contents of the invention [0003] The present invention provides an ultra-short-term planning method for a distribution network with smooth switching of multiple operating modes, which overcomes the shortcomings of the prior art described in the background art. [0004] The technical solution adopted by the present invention to solve its technical p...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/28
Inventor 方晓洁黄伟琼季夏轶曾和浦林金河沈彬娜
Owner ZHANGZHOU POWER SUPPLY COMPANY STATE GRID FUJIANELECTRIC POWER
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