Flexible closed-loop power regulation method and device with integrated protection and control configuration

Abstract

The invention discloses a flexible closed-loop power regulation method and device with integrated protection and control configuration, which realize seamless switching of power supply at a segment point of a dual-power-supply ring network and are mainly applicable to an AC distribution network. The flexible closed-loop power regulation method with integrated protection and control configuration in the invention mainly includes the following steps: S1, confirming the section selection of a power section of a distribution network by analyzing the distribution network structure; S2, simulating the influence of the loop closing moment on a power supply system; S3, analyzing the possibility of various faults in the power regulation process and putting forward countermeasures; S4, performing aUPFC control strategy in order to ensure the minimum impact of loop closing; and S5, capturing the loop closing operation time, and completing loop closing at the optimal time of system closing.

Description

technical field [0001] The present invention relates to a power regulation method and device, more specifically to a flexible closed-loop power regulation method with integrated protection and control configuration. Background technique [0002] The distribution network planning regulations require the feeder to meet a certain load transfer capacity, and to communicate through the "hand in hand" method to ensure that the load carried by the feeder can be transferred by other feeder in case of failure, maintenance, construction, load reversal, etc. transfer. Especially in the case of power outage maintenance, if the method of first power outage and waiting for power transfer is completed (referred to as power outage transfer, it will inevitably cause a short-term power outage of the load; and in the case of power transfer on both sides of the feeder, first transfer power supply (referred to as live power supply), and then cut off the power supply of the section to be repaire...

AI Technical Summary

Problems solved by technology

Especially in the case of power outage maintenance, if the method of first power outage and waiting for power transfer is completed (referred to as power outage transfer, it will inevitably cause a short-term power outage of the load; and in the case of power transfer on both sides of the feeder, first transfer power supply (referred to as live power supply), and then cut off the power supply of the section to be repaired, which can eliminate the impact on the load, but due to factors such as different impedances in the systems on both sides, uneven load distribution, and voltage differences on both sides, the closed loop operation of live power supply There may be a large inrush current during operation, which may even cause the feeder protection to malfunction; and there may be a large circulating current or even reverse power during the closed loop operation, which will cause the system to fail to operate stably; at the same time, there is a possibility of accident expansion and increase manual operation risk

Images