Power control method of three-end intelligent soft switch

Abstract

The invention belongs to the field of application of a power electronic device in a power distribution network, and particularly relates to a power control method of a three-end intelligent soft switch. The three-end intelligent soft switch is used and connected with three different power distribution regions, the three-end intelligent soft switch is controlled by employing a DC current control strategy, the DC current control strategy is divided to a voltage-current control strategy and a power-current control strategy, the three-end intelligent soft switch is divided to two conditions of one-end rectification and two-end inversion and two-end rectification and one-end inversion according to an actual running state, and a dispatching system is used for allocating a transmission power of the three-end intelligent soft switch according to device capacity demands of different power distribution regions. A theoretical reference is provided for power allocation of the three-end intelligentsoft switch, so that the three-end intelligent soft switch of the power electronic device can be applied into a power distribution network very well.

Description

technical field [0001] The invention belongs to the field of application of power electronic devices in distribution networks, and in particular relates to a power control method of a three-terminal intelligent soft switch. Background technique [0002] The rapid development of new energy technologies has promoted the access of a large number of distributed power sources to the distribution network, making the grid structure and coordinated control methods of the future distribution network more complex. The traditional distribution network changes the topological structure of the distribution network by controlling the on-off of the tie switch, and then regulates the operation status of the distribution system. However, in actual operation, there are problems such as switching loss and closed loop current in the contact switch, which cannot be operated frequently in a short period of time, and cannot quickly respond to changes in the operating status of the power distributi...

AI Technical Summary

Problems solved by technology

However, in actual operation, there are problems such as switching loss and closed loop current in the contact switch, which cannot be operated frequently in a short period of time, and cannot quickly respond to changes in the operating status of the power distribution system, which brings hidden dangers to the safe operation of the power grid and is not suitable for future intelligence. Requirements for Flexible Power Flow Control in Distribution Networks

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