Novel energy-saving control system for reversible dc transmission test bench

Abstract

The invention provides a novel energy-saving control system of a reversible direct-current transmission test-bed, belongs to a mechanical electrical product, and has two feedback circuits, including a direct-current voltage booster feedback circuit and a line commutated inversion feedback circuit which are formed, taking full-controlled three-phase rectifier circuit, an electric reactor and diodes as the core. Through the adjustment of contravariant angle of the line commutated inverter and the exciting voltage of a load generator, the load generator can feed the electric power back to an electricity grid and directly back to an electric motor; the line commutated inversion feedback circuit uses the line commutated inversion principle to feed a small part of electrical energy generated by the load generator back to an AC electricity grid, the AC electric grid feeds the part of electrical energy back to the electric motor through the rectifier circuit; the direct-current voltage booster feedback circuit uses the direct-current voltage boost principle to feed most of the electric energy generated by the load generator back to the electric motor directly. The invention has good effect in energy saving, high efficiency of electric energy feedback, simple structure, steady operation, convenient control and can reduce the pollution to the AC electricity grid and wiring loss, and is applicable to the test-bed for testing various mechanical products performance and properties.

Description

technical field

[0001] The invention belongs to mechanical and electronic products, and in particular relates to a test bench for performance and characteristic tests of various mechanical products. Background technique

[0002] Regarding the energy saving problem of the DC drive test bench, there are currently two good solutions:

[0003] Option 1 mainly uses the principle of active inverter to feed back the electric energy generated by the load generator of the test bench to the grid to achieve energy saving, which has a certain energy saving effect. However, this solution will result in low grid power factor, serious grid pollution, and low feedback efficiency. Moreover, when the load generator speed drops to a certain level, the load cannot be loaded by relying on active inverter, that is, the feedback power will be sent to the grid. The second scheme is mainly to design a method in which the rated voltage of the generator in the test bench is higher than the voltage of...

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