Power flow control method for flexible multi-state switches connected to distributed power sources

Abstract

The invention discloses a power flow control method of a flexible multi-state switch connected to a distributed power source, the steps of which include: 1. Constructing a power model of a flexible multi-state switch connected to a distributed power source and voltage source converters at each port Mathematical model; 2 Calculate the load rate of each feeder before connecting the flexible multi-state switch and the balanced load rate after connecting the flexible multi-state switch, and deduce the active power adjusted by the connected flexible multi-state switch port voltage source converter ; 3 According to the active capacity ratio of each feeder, calculate the active power input by the distributed power source allocated to each feeder; 4 Calculate the total active power output by the flexible multi-state switch connected to the distributed power source to each feeder line. The invention can adjust the unbalanced load active power between feeders, and optimize the distribution of active power input by distributed power sources, thereby reducing the power fluctuation caused by the access of distributed power sources to a single feeder line, and improving intermittent energy consumption Level.

Description

technical field [0001] The invention relates to the technical field of flexible power distribution equipment control, in particular to a power flow control method of a flexible multi-state switch connected to a distributed power supply. Background technique [0002] With the large-scale access of distributed power to the power grid, the power flow of the distribution network is becoming more and more complicated, the problem of voltage exceeding the limit is becoming more and more prominent, and the reliability of power supply and the level of power quality are reduced. In 2009, Imperial College of Technology proposed the concept of soft normally open switch to replace the tie switch or section switch in the traditional distribution network. The flexible multi-state switch is developed based on the soft normally open switch. Compared with the only on and off states of the conventional switch, the flexible multi-state switch has the characteristics of flexible power adjustmen...

AI Technical Summary

Problems solved by technology

[0003] However, there are intermittency and volatility problems in distributed power generation. Distributed power supply is directly connected to the feeder, which will cause power and voltage fluctuations to a single feeder

And due to the uncertainty of distributed power output, the feeder load rate changes frequently, and the port control setting of the flexible multi-state switch also needs to be adjusted frequently.

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