Voltage fluctuation control system

Abstract

The invention discloses a voltage fluctuation control system which comprises the components of an input module, a sampling module, a fluctuation model operation module, a fluctuation signal generating module and an executing module. The fluctuation model operation module is connected with the input module and the sampling module. The fluctuation signal generating module is connected with the fluctuation model operation module. The executing module is connected with the fluctuation signal generating module. According to the voltage fluctuation control system provided by the invention, a voltage fluctuation simulation form can be set through the input module. Furthermore the preset voltage fluctuation analog form can be adjusted according to the current voltage state of a to-be-tested power grid, thereby making a voltage fluctuation target model after adjustment more approach to the state of the to-be-tested power grid, and realizing more accurate and ideal voltage fluctuation simulation. The voltage fluctuation control system can simulate temporary increase and temporary drop of single-phase voltage, two-phase voltage and three-phase voltage. Furthermore the duration time, the depth, starting phase, stopping phase of type of each of temporary increase and the temporary drop of the voltage can be adjusted.

Description

Technical field [0001] The invention relates to the technical field of power grid testing, in particular to a voltage disturbance control system. Background technique [0002] According to statistics from the US Electric Power Research Institute, more than 90% of power quality problems are caused by voltage disturbances (VoltageSag) and voltage bumps (VoltageSwell), among which voltage disturbances are the main cause of accidents. At present, researches on voltage generators are carried out at home and abroad. Because of the uncontrollability of grid faults, special equipment must be used to test the ride-through capability of the electrical system when voltage disturbances occur. This equipment is called voltage disturbance generators. . [0003] At present, most of the development of voltage disturbance generators is concentrated on the sag generator, and the swell generator mainly adopts the transformer method, that is, the transformer is used as the swell generator, and the tr...

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Problems solved by technology

[0003] At present, the development of voltage disturbance generators is mostly concentrated on the sag generator, and the swell generator mainly adopts the transformer method, that is, the transformer is used as the swell generator, and the transformer occupies a large volume, and with the required output of the voltage disturbance generator As the power increases, the volume of the transformer required also increases, which is not conducive to the miniaturization of the voltage disturbance generator. Long, low sensitivity, which leads to low sensitivity of the integrated voltage disturbance generator

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