Dynamic passive compensation system and controlling method thereof

Abstract

The invention discloses a dynamic reactive power compensation system and a control method thereof. The system comprises a static reactive power compensator (DSTATCOM) used for continuing a sub-system, and a thyristor switching capacitor (TSC) used for scattering the sub-system, and a controller, wherein, the static reactive power compensator consists of a three-phase voltage type inverter and an inductor, and is connected with a plurality of thyristor switching capacitors in parallel on an electric network; wherein, the controller comprises an artificial neural net controller which is in reactive power intelligent control grade and is accessed into the DSTATCOM and a capacitor circulated controller which is in decision processing grade and is accessed into the TSC for circulated switching control of the capacitors. The invention realizes high capacity reactive power quick and continuous compensation with low cost, high efficiency and energy conservation; the control method based on the artificial neural net provided by the invention can deal with various uncertain factors of a complicated power system during operation process so as to improve the anti-interference capability of the system, not only has better dynamic compensation characteristic, but also improves the robustness and control precision of the system.

Description

technical field [0001] The invention relates to a dynamic reactive power compensation system and a control method thereof. Background technique [0002] There are many equipments with frequent and severe reactive power changes in the users of today's power grid, such as rolling mills, electric arc furnaces, electrified railways, etc., which often make the power factor of the power supply bus low and cause voltage flicker. This not only increases the line loss of the distribution network, but also causes great harm to some precision equipment that has high requirements on the quality of the power supply voltage. In order to solve this problem, there is a higher requirement for the reactive power compensation device installed at the public power supply point: it can provide fast and continuously adjustable large-capacity reactive power. However, some existing reactive power compensation devices for distribution networks have the following deficiencies: [0003] 1. Although t...

AI Technical Summary

Problems solved by technology

[0003] 1. Although the static var compensator DSTATCOM can perform fast and continuous reactive power compensation, due to the limitation of the manufacturing process and engineering cost of power electronic devices, a single DSTATCOM with a large capacity often has difficulties in design and engineering implementation

[0004] 2. Although the thyristor switching capacitor TSC can meet the requirements of the project capacity, it cannot perform continuous stepless reactive power compensation, and the response speed of the device is not fast

Images