Novel fixed reactive compensation device

Abstract

The invention discloses a novel fixed reactive compensation device. The novel fixed reactive compensation device comprises a voltage transformer, a current transformer, an analog-digital converter, a controllable switch, a digital signal processor, human-machine interaction equipment and a conventional fixed reactive compensation device, wherein the voltage transformer and the current transformer are used for measuring three-phase network voltage and current analog signals in real time; the analog-digital converter is connected with the voltage transformer and the current transformer; the controllable switch is connected onto a main incoming line of all capacitor branch lines in the conventional fixed reactive compensation device; the digital signal processor is used for carrying out reactive tide comprehensive information analysis according to network voltage and current digital signals so as to identify a reactive tide direction and control the human-machine equipment to display reactive tide comprehensive information in real time; when reactive power is sent back to a power grid, the controllable switch is controlled to be disconnected, so that the requirements of reaching the standard of power factors and not sending the reactive power back to the power grid are met by simply modifying the conventional fixed reactive compensation device, and the economical burden of enterprise users is alleviated.

Description

technical field [0001] The invention relates to the technical field of power supply, and more specifically, relates to a novel fixed reactive power compensation device. Background technique [0002] In the past, the State Grid’s reactive power compensation requirements for power users were simple: for power users with power supply of 100kVA and above, the power factor of the high-voltage side of the transformer should not be lower than 0.95 when the user’s peak load; for other power users, the power factor should not be lower than 0.90. Therefore, in order to save costs, most enterprise users only configure fixed reactive power compensation devices that meet the power factor requirements. If the power compensation capacity is configured, it cannot be automatically compensated according to the dynamic changes in reactive power compensation demand. Therefore, when the load is low (for example, most enterprises stop production and reduce production during holidays, resulting in...

AI Technical Summary

Problems solved by technology

However, due to historical reasons, most of the reactive power compensation devices on the user side still use the above-mentioned fixed reactive power compensation devices. If en...

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