Digital link-based switching reactive compensation control device and method

Abstract

The invention discloses a digital link-based switching reactive compensation control device and method, and aims to solve a technical problem of inaccurate reactive power compensation in the prior art. The device comprises a reactive data manager and a reactive compensation manager. The reactive data manager collects electrical data of a 380V low-voltage wire inlet cabinet and a 10KV high-voltagewire outlet cabinet, performs data processing on the electrical data to obtain reactive data, and transmits the reactive data to the reactive compensation manager through a digital link; and the reactive compensation manager performs reactive power compensation according to the reactive data and capacitor switching logic, and performs fault analysis and judgment according to an electrical quantityof a capacitor cabinet and a state of a contactor. According to the invention, the capacitor can be quickly and accurately switched, and reactive power compensation is carried out.

Description

technical field [0001] The invention relates to a switching reactive power compensation control device based on a digital link and a method thereof, belonging to the technical field of reactive power compensation in electric power systems. Background technique [0002] The electrical equipment in the power system will generate reactive power when it is in use, and it is usually inductive, which will reduce the capacity utilization efficiency of the power supply and cause power loss. The power factor is an important technical data of the power system, which can measure the efficiency of electrical equipment: a low power factor indicates that the reactive power of the circuit for alternating magnetic field conversion is large, which increases the loss of line power supply. In an AC circuit, the power factor can be calculated by the cosine of the phase difference (Φ) between the voltage and the current, represented by the symbol cosΦ. In numerical terms, the power factor is the...

AI Technical Summary

Problems solved by technology

[0005] 1. The reactive power compensation manager needs to read the current transformer installed in the incoming main cabinet to obtain reactive electrical data, but the distance between the reactive power compensation manager and the current transformer is generally far away, and the line is easily disturbed, resulting in Inaccurate measurement of electrical quantities;

[0006] 2. Most switching reactive power compensation systems only compensate the reactive power data on the low-voltage incoming line side (380V), but cannot compensate the reactive power incoming line on the high-voltage outgoing line side (10kV), resulting in reactive power compensation cabinets There is no way to accurately compensate the reactive power consumed by the transformer;

[0007] 3. The switching reactive power compensation system will not detect the state of the contactor, and cannot notify the user in time when the contactor fails, and the failure of the contactor will directly lead to low compensation efficiency, low power factor, and increase the burden on the transformer, and may cause security issues;

[0008] 4. The switching reactive power compensation system does not pay attention to the capacity of the capacitor, and cannot achieve accurate switching, and even frequent switching occurs

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