Mining high-low voltage reactive power and harmonic compensation device based on cancellation method

Abstract

The invention relates to a mining high-low voltage reactive power and harmonic compensation device based on a cancellation method, and belongs to the technical field of electrical test equipment. Themining high-low voltage reactive power and harmonic wave compensation device based on a cancellation method includes a high voltage bus, a bus transformer, an electric energy quality controller, a harmonic transformer T2, a harmonic transformer T3, a harmonic transformer T4, a reactive power generator and a harmonic generator, wherein the low voltage side of the bus transformer is connected with the electric energy quality controller through a reactor I; the electric energy quality controller is connected with the harmonic transformer T2 through a reactor II; the high voltage side of the harmonic transformer T2 is connected with the high voltage bus; the low voltage side of the harmonic transformer T2 is also connected with one end of a reactor III and one end of a reactor IV; the other end of the reactor III and one end of the reactor IV are respectively connected to the reactive power generator and the harmonic generator; and the harmonic transformer T3 and the harmonic transformer T4 are respectively connected with a low voltage test product and a high voltage test product through a voltage adapter and a high voltage adapter. The mining high-low voltage reactive power and harmonic compensation device based on a cancellation method can effectively simplify the test structure, can improve the test efficiency and can reduce the cost.

Description

technical field [0001] The invention belongs to the technical field of electrical test equipment, and relates to a mine-used high and low voltage reactive power and harmonic compensation device based on a cancellation method. Background technique [0002] In order to test the electrical performance parameters of the mine-used high and low voltage reactive power and harmonic compensation device, the accompanying load device of the test system simulates loads with various characteristics and applies them to the test circuit. The test products mainly include active and passive reactive power compensators and power filters, and the test items are many and complicated. This requires that the accompanying test load device has good adaptability and transformability, and can meet the test requirements of different types and specifications of samples. [0003] At present, in the existing test equipment, fixed impedance or nonlinear load is mainly used as the load, because of its imp...

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Problems solved by technology

[0003] At present, in the existing test equipment, fixed impedance or nonlinear load is mainly used as the load, because of its impedance characteristics, when the voltage drops, it cannot provide the required reactive power support, so the ability to deal with dynamic tests is weak, and , in order to eliminate the harmonics generated by the device, a filter must be installed. In addition, too many load devices connected in parallel will easily cause the test system to oscillate

The function of the test system is single (independent test of reactive power and harmonics), switching loads in stages, not continuously adjustable, voltage level adaptability and transformability are weak, and key parameters such as compensation effect and temperature rise are mostly tested on-site, etc. shortcoming

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