Integrated governance device for electric energy quality

Abstract

The invention discloses an integrated governance device for electric energy quality. The integrated governance device comprises a static var generator and a static var compensator; the static var compensator comprises a fixed compensator and a thyristor control electric reactor; the static var generator, the fixed compensator and the thyristor control electric reactor are connected on a power grid between an electric network source and a load in parallel; each static var generator comprises one or more than two H-bridge units connected in series; direct current support capacitors are connected to two ends of the H-bridge units in parallel; each fixed compensator comprises a capacitor and an electric reactor which are connected in series; each phase of thyristor control electric reactor comprises a phase-control reactor and a controllable valve body composed of one or more than two reverse parallel thyristors connected in series, and the controllable valve body is connected with the phase-control reactor in series. The device not only can compensate as to idle work, but also can achieve the compensation of a harmonic wave and a negative sequence. Meanwhile, the idle work and harmonic wave are continuously and adjustably compensated at the high-voltage side, and no transformer is led, so that the compensation speed is fast.

Description

technical field [0001] The invention relates to a power management device applied in the field of electric power systems, in particular to a direct-mounted power quality integrated management device (High Voltage Suspend Hybrid Compensator, HVSHC) applied to a high-voltage distribution network. Background technique [0002] The power quality of the power supply and distribution system is directly related to the stability of the power system, the safety of electrical equipment, and whether it is economical to use electricity. With the increasing use of power electronic devices and sensitive loads, power quality issues have become the primary technical issue concerned by the international power supply community, which is mainly reflected in voltage fluctuations, harmonics, flicker, etc., as well as reactive power and load in current. order, the influence of harmonic components, etc. Modern power quality problems are caused by the application of power electronics technology, a...

AI Technical Summary

Problems solved by technology

However, the current research on hybrid compensation technology mainly focuses on reactive power compensation on the low-voltage side, and there is no report on the use of active harmonic control in high-voltage direct-mounted distribution networks.

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