Capacitive load power factor compensation circuit based on multi-tap reactor

Abstract

The invention relates to a multi-tap electric reactor-based capacitive load power factor compensation circuit comprising a load voltage-current signal processing circuit and a compensation control and power supply circuit. To be specific, the multi-tap electric reactor-based capacitive load power factor compensation circuit is composed of a voltage transformer VS1, a current transformer CS1, a processor IC1, a drive chip IC2, a voltage-stabilized source module U0, an A solid-state relay U1, a B solid-state relay U2, a C solid-state relay U3, a D solid-state relay U4, an E solid-state relay U5, an F-solid state relay U6, a G solid-state relay U7, an electric reactor L1, a reference tube D1, an upper voltage-regulator tube D2, a lower voltage-regulator tube D3, and a load resistor R1 and the like. According to the invention, disturbance-free switch controlling is carried out on a power grid by using the multiple zero-crossing alternating-current solid-state relays and one multi-tap compensation reactor, thereby realizing multi-level compensation control of a power factor; and the requirements of power factor compensation control of most of capacitive loads can be met. Moreover, the provided circuit has advantages of high cost performance, good universality, and high security and reliability.

Description

technical field [0001] The invention belongs to the field of industrial measurement and control, and relates to a circuit, in particular to a capacitive load power factor compensation circuit based on a multi-tap reactor, which is suitable for applications where power factor compensation control is automatically performed on AC capacitive loads to improve power supply , Power efficiency. Background technique [0002] Some of the AC loads are capacitive loads, whose current phase is ahead of the voltage phase, and the power factor of the power supply and power system is an important indicator of the quality of power operation. At present, in the research and technical application of improving the power factor of AC loads, it is mainly aimed at inductive loads. The main schemes for improving the power factor of capacitive loads are: one is based on a synchronous condenser (Synchronous Condenser, referred to as SC), and the other is based on a thyristor-controlled reactor. Th...

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Problems solved by technology

The disadvantages of the existing schemes are: firstly, because the core of the synchronous condenser is a rotating motor, the power consumption is large, the noise is large, and the maintenance is complicated; secondly, the existing single reactor can only achieve an ideal compensation effect for one point. low utilization

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