Static voltage stabilization device and voltage stabilization method of three-phase intelligent line

Abstract

The invention provides a static voltage stabilization device and a voltage stabilization method of a three-phase intelligent line. In recent years, various non-linear loads in the power grid have beenincreasing; because of load volatility, nonlinearity and unbalanced power consumption characteristics, harmonic, reactive power, transient shock and three-phase unbalance problems in the power grid become series increasingly. The static voltage stabilization device is composed of a housing; and an alternating-current / direct-current sampling module, a main circuit module, a control module, a driving module, a power supply module and a protection module are installed inside the housing. The alternating-current / direct-current sampling module includes one group of voltage transformers and two groups of current transformers; and the two groups of current transformers are connected with a system side (1) and a load side (2) respectively. The main circuit module includes a rectifier circuit (3),an inverter circuit (4) and a filter circuit (5) and is connected with the system side and the load side; and the control module is connected to the main circuit module via the driving module. The invention provides a static voltage stabilization device and a voltage stabilization method for a three-phase intelligent line.

Description

Technical field: [0001] The invention relates to a three-phase intelligent line static voltage stabilizing device and a voltage stabilizing method. Background technique: [0002] With the continuous improvement of my country's economic level, electric energy plays an increasingly important role in the national economy and people's daily life. Various advanced equipment in modern automated production have higher and higher requirements for electric energy quality. The various non-linear loads in the incoming power grid are constantly increasing. These load fluctuations, nonlinear and unbalanced power consumption characteristics make the problems of harmonics, reactive power, transient impact and three-phase unbalance in the power grid more and more serious. It affects the safe, stable and economical operation of the power grid and electrical equipment. [0003] At present, in order to solve the above problems, devices such as active power filter (APF), static var compensator (...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a three-phase intelligent line static voltage stabilizing device and voltage stabilizing method, which is different from active power filters, static var compensators and static var generators, and adopts the method of connecting to the power grid in series , in-situ compensation, comprehensively improve the power quality of the station area, solve the three-phase unbalance problem, solve the three-phase unbalance problem of the distribution network, reduce line loss, stabilize and adjust the three-phase voltage, improve power supply quality, improve the power environment, and solve The problem of single-phase overload of the transformer can improve the operating life of the transformer, realize reactive power balance, improve the effective output capacity of the distribution network, and not generate harmonics and cause secondary grid pollution.

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