Dynamic power flow control method based on wide range controllable transformer with bidirectional power transistor

Abstract

The invention discloses a dynamic trend control method based on a wide-scope controllable transformer comprising bidirectional power tubes. By use of a rapidly conducted and broken electric electronic switch, conduction and breaking of a tap joint at the output side (secondary side) of the wide-scope controllable transformer are controlled, another two phases of windings are connected in series with the side of each phase of the tap joint of the wide-scope controllable transformer, at the same time, the four bidirectional power tubes are additionally arranged for changing the conduction directions of intersected-phase windings, the phase and the amplitude of output voltages of the controllable transformer can be changed in a maximum scope, adjustment of active power and reactive power is realized, since conduction of the tap joint of the wide-scope controllable transformer is controlled, the dynamic trend of a power network can be adjusted and controlled, and the method has the advantages of low cost and high control reliability of the dynamic trend.

Description

technical field [0001] The invention relates to the technical field of flexible AC power transmission, in particular to a dynamic power flow control device and a control method based on a wide range controllable transformer including a bidirectional power tube. Background technique [0002] With the interconnection of large-scale power systems and the use of various new equipment, while making power generation and transmission more economical and efficient, the scale and complexity of the power system have also increased, and the possibility of the power grid operating on the edge of the stability limit has also greatly increased. . At present, my country has reached a new stage of regional power grid interconnection and national unified networking. Large-scale interconnection brings many advantages, but grid operation and stability control will become more complex. The flexibility of grid operation, controllability of power flow and grid stability have become more and mor...

AI Technical Summary

Problems solved by technology

However, due to the complexity of power system control, the current FACTS technology also has great limitations:

[0007] (1) FACTS device controllers interact with each other, leading to performance deterioration;

[0008] (2) The cost of the project is high, and it is difficult to popularize and apply;

[0009] (3) The loss of itself is relatively large;

[0010] (4) Power system stability problems caused by FACTS device failure

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