Energy scheduling system and method for low-voltage flexible direct-current power distribution transformer areas

Abstract

The invention discloses an energy dispatching system and method for low-voltage flexible direct-current power distribution transformer areas. The energy dispatching system comprises an EMS energy management system, first low-voltage flexible direct-current equipment arranged in a first power distribution transformer area and second low-voltage flexible direct-current equipment arranged in a second power distribution transformer area, wherein the first low-voltage flexible direct-current equipment works in a voltage source mode, and the second low-voltage flexible direct-current equipment works in a current source mode; when the power factors of the two transformer areas are less than the target power factor, the EMS energy management system dispatches the two sets of low-voltage flexible direct-current equipment to conduct reactive compensation on the two transformer areas respectively; after the power factors of the two transformer areas reach the target power factor, load rates of transformers of the two transformer areas are calculated, and when the load rates of the two transformer areas exceed a first limit value and the difference between the load rates of the two transformer areas is greater than a second limit value, the output power size and the power flow direction of second low-voltage flexible direct-current equipment are scheduled to enable the load rates of the two transformer areas to be the same; and flexible interconnection between the two transformer areas is realized by accurately regulating and controlling the output power of the low-voltage flexible direct-current equipment in the two transformer areas.

Description

technical field [0001] The invention belongs to the field of low-voltage power distribution, and in particular relates to an energy dispatching system and method for a low-voltage flexible direct distribution station area. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] In popular tourist attractions, areas where electric vehicle charging piles are connected intensively, and areas where the street stalls are economically prosperous at night, due to economic and social development ahead of the development of the power grid, the capacity of the distribution station area cannot meet the user's load demand for a period of time, and the distribution transformer in the station area is heavy / Overload phenomenon occurs from time to time, which brings serious challenges to the reliable power supply of users and the safe operation of grid equipment...

AI Technical Summary

Problems solved by technology

[0005] An important problem faced by the low-voltage station area is the periodic heavy / overload phenomenon. The load rate is relatively low in most of the time periods, and the heavy / overload phenomenon occurs only in some time periods. For the distribution station area, upgrade the lines, transformers, and reactive power compensation. Transformation to increase the load capacity of the distribution station area to solve the problem of heavy / overload in the distribution station area, often resulting in a low load period, which makes the utilization rate of the distribution equipment low. At the same time, when the capacity of the distribution transformer in the low-voltage station area increases to a certain should not continue to increase

In addition, while increasing the capacity of the station area, it often faces an increase in power distribution land, which greatly increases the cost of upgrading and increasing the capacity of the station area.

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