Method for carrying out intelligent control on dynamic reactive power compensation of SVG (TSC) (static var generator (thyristor switched capacitor))

Abstract

The invention discloses a method for carrying out intelligent control on the dynamic reactive power compensation of a SVG (TSC) (static var generator (thyristor switched capacitor)), which comprises the following steps of: controlling the SVG and the TSC by using a master control unit; carrying out centralized sampling, calculation and control by using the master control unit, and automatically adjusting to adopt a reactive power compensation mode of the SVG and adopt a reactive power compensation mode of the TSC; and preferably starting the reactive power compensation mode of the SVG, and when the SVG has a fault, adopting the reactive power compensation mode of the TSC. When the reactive power demand of a system is instantly changed dynamically, the SVG starts a PWM (pulse-width modulation) control program at a predetermined response speed firstly, and then outputs compensation currents so as to rapidly and dynamically adjust the variable quantity of reactive power; and when the load of the electric power system is changed within a large range and exceeds the capacity of the SVG, a grouping switch function of the TSC is started so as to compensate the reactive power demand of the system. The method for carrying out intelligent control on the dynamic reactive power compensation of the SVG (TSC), disclosed by the invention, has the advantages that: the response speed of reactive power compensation can be improved, an effect of carrying out dynamic and continuous adjustment on reactive power can be achieved, and the like.

Description

technical field [0001] The invention relates to an intelligent control method for SVG+TSC dynamic reactive power compensation. Background technique [0002] In the power system, in order to reduce the power loss caused by the large amount of reactive current provided by the distribution network, it is necessary to configure reactive power compensation devices with corresponding voltage levels at each power receiving point (such as low-voltage transformers and large-scale electrical equipment installations) , Industrial and mining, enterprises, and residential areas with low power factors must install reactive power compensation devices. Large-scale asynchronous motors, transformers, welding machines, presses and other equipment often need to install reactive power compensation devices to improve power grid transmission capacity and power. Utilization, improve electricity consumption, and save energy. [0003] At present, in the scheme design of dynamic var compensation cont...

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Problems solved by technology

[0004] 1) For the scheme of using two different main control units (MCUs) to separately control SVG and group switching, the two devices cannot be coordinated and compensated correctly, the control effect is not ideal, and even the grid system is unstable;

[0005] 2) For the scheme of using a set of main control unit (MCU) to simultaneously control SVG and thyristor group switching capacitors (TSC), that is, the SVG+TSC scheme, the TSC strategy is generally adopted as the main strategy, and the SVG strategy is used as the auxiliary idea; due to the influence of TSC Response speed (>100ms) is limited, resulting in poor overall dynamic performance, unable to suppress voltage fluctuations and flicker

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