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Power distribution network planned island online division method based on decision table

A technology of island division and decision table, which is applied to the integration of power network operating systems, AC networks with the same frequency from different sources, electrical components, etc., can solve problems that need to be studied, and achieve improved solution speed, improved power supply reliability and The effect of toughness

Active Publication Date: 2020-10-30
WUHAN UNIV +1
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  • Claims
  • Application Information

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Problems solved by technology

But how to come up with an effective partitioning strategy remains to be studied

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  • Power distribution network planned island online division method based on decision table
  • Power distribution network planned island online division method based on decision table
  • Power distribution network planned island online division method based on decision table

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Embodiment Construction

[0063] The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

[0064] 1. Online island division framework

[0065] Online island partitioning includes partition model and decision table. Before the blackout occurs, the distribution network operator uses a large number of measurement devices to obtain real-time measurement information and solve the partition optimization model to obtain the optimal partition results that satisfy various constraints. Then, a corresponding decision table is formed according to the division result, load power and load priority. When a blackout occurs, calculate the current power P of the Point of Common Coupling (PCC) PCC,now and optimal moment power P PCC,opt The difference ΔP PCC . Using a decision table according to ΔP PCC The size is corrected online for the division result. For example, when ΔP PCC When >0, it means that ...

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Abstract

The invention provides a power distribution network planned island online division method based on a decision table. The online island division method comprises two processes of division model off-line optimization and decision table on-line correction. Before the blackout occurs, division model off-line optimization is regularly executed to obtain an optimal division scheme; and when a blackout occurs, the division scheme is corrected online by using the decision table according to the system state, so that the load is matched with the power of the power supply in real time. In order to increase the solving speed, on the one hand, a linearized power flow equation and a large M algorithm are adopted to simplify a division model into a mixed integer linear problem; and on the other hand, adecision table is generated by adopting a heuristic algorithm. According to the online island division method provided by the invention, the system can smoothly transmit to the island mode without power failure at the moment of failure, and the power supply reliability and toughness of the system are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of multi-time scale coordinated control of distribution networks, and in particular relates to an online division method of distribution network planning islands based on a decision table. Background technique [0002] Providing uninterrupted and continuous power supply is the persistent goal of operators, but frequent extreme weather has caused a large number of power outages. For example, Hurricane Sandy in 2012 caused nearly 8 million residents in the United States without power supply; The strong typhoon caused a power outage for nearly 50 hours. Power outages have caused huge economic losses and serious social impacts. When a fault occurs, the existing recovery method is to transfer the load on the faulty feeder to the adjacent normal feeder by means of network reconstruction. However, when extreme weather causes the upper-level main grid to fail, the entire power distribution area will lose power, an...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/06H02J3/46H02J3/14H02J3/24
CPCH02J3/381H02J3/06H02J3/46H02J3/14H02J3/24Y04S20/222Y02B70/3225
Inventor 徐箭谢博宇廖思阳袁智勇于力徐全林跃欢
Owner WUHAN UNIV