Intelligent mixed type high-pressure dynamic reactive compensation device

Abstract

The invention discloses an intelligent mixed type high-pressure dynamic reactive compensation device which comprises a compensation cabinet, a temperature controller and a heat dissipation fan. The temperature controller is used for controlling temperature inside the compensation cabinet. The compensation cabinet comprises a filter, a group of capacitors which are connected in parallel and a group of electric reactors which are connected in parallel. The electric reactors are adjustable electric reactors based on magnetic flux. A controller and a compensation control unit are further arranged inside the compensation cabinet. The controller is used for collecting three-phase high-voltage electricity. The compensation control unit comprises a trigger plate, a thyristor module and an insulated gate bipolar translator (IGBT) module. The compensation control unit receives a switching order of the controller, and is used for detecting of system parameters and compensation controlling of putting in and drawing out. The trigger plate adjusts the electric reactors in a double mode through the thyristor module and the IGBT module, a continuous stepless adjustable control mode is achieved, and adjusting range is wide.

Description

technical field [0001] The invention relates to a reactive power compensation device, in particular to an intelligent hybrid high-voltage dynamic reactive power compensation device. Background technique [0002] At present, the commonly used reactive power compensation equipment in our country is mechanical shunt reactor and switching capacitor, which belong to static compensation, and have the problems of discontinuous adjustment and slow response speed. The dynamic reactive power compensation device is usually composed of a thyristor-controlled reactor, a thyristor-switched capacitor, and a filter bank. The thyristor-controlled reactor can quickly and continuously change the inductive current of the device by changing the conduction angle of the thyristor connected in series with the reactor. Thereby a smoothly regulated reactive power is obtained. [0003] The reactor of the common dynamic reactive power compensation device is controlled by a thyristor, and its inductive...

AI Technical Summary

Problems solved by technology

When the conduction angle of the thyristor is less than 90°, the current of the reactor is non-sinusoidal and contains harmonic components, so the fixed capacitor bank must be designed as a filter or equipped with another filter, which has a complex structure and large losses

In the high-voltage system, due to the limited withstand voltage value of a single thyristor, the high-voltage system is realized by connecting multiple transistors in series, which not only reduces the reliability of the system, but also greatly wastes the flow capacity of the thyristor, resulting in insufficient adjustment range and loss. Large, large harmonics and other issues

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