Magnetic control reactor control trigger device based on tc797a

Abstract

The invention discloses a magnetically controlled reactor trigger control device based on TC797A. The magnetically controlled reactor trigger control device comprises a synchronous signal processing module (1), a phase shift trigger pulse generation module (2), a three-phase phase sequence detection and phase lack judgment module (3), a pulse signal isolation and amplification module (4) and a 15V voltage stabilizing module (5), wherein the phase shift trigger pulse generation module (2) comprises a phase shift trigger pulse generation device, a time-base oscillation device, an integrating capacitor device, a start reset device and a pulse static device. The trigger control device provided by the invention has the advantages of high phase control accuracy, small three-phase imbalance, high interference resistance and easiness for control, and has three-phase voltage phase sequence judgment and phase lack detection alarm functions, thereby ensuring the operation stability of a magnetically controlled reactor as well as output current control accuracy. The trigger control device can ensure the phase sequence judgment during installation and application of equipment to avoid equipment faults caused by phase sequence errors.

Description

technical field [0001] The invention relates to the control field of a magnetron reactor of a reactive power compensation device, in particular to a control trigger device of a large-capacity, high-voltage magnetron reactor. Background technique [0002] As the main equipment for purifying the power grid, reactive power compensation equipment has been widely used in various industries. Magnetically controlled reactor (magnetically controlled reactor) full name magnetic valve controllable reactor, referred to as MCR, and a dynamic reactive power compensation device composed of high-voltage capacitors have become the main technical solution for reactive power compensation in the power industry. Due to the needs of the power system, the controllable reactor has always been a research hotspot, so the magnetic saturation type controllable reactor with the help of DC control has been promoted and applied, and the magnetic saturation of the reactor can be changed by changing the ex...

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Problems solved by technology

The phase-shift trigger circuit composed of discrete components mainly includes a synchronous voltage conditioning circuit, a phase-locking circuit, a pulse generating circuit, and a pulse amplifying circuit. Due to the large number of components used and the unsatisfactory phase-locking, the stability is poor and the anti-interference is poor.

The dedicated integrated circuit KC (KJ) series or TCA785 thyristor integrated trigger circuit must be powered by dual power supplies when used, and has high power consumption and high requirements for integral capacitance and resistance. Simultaneous use of three phases will easily lead to asymmetry of their respective phases and other shortcomings, so there are also complex circuit structures, poor long-term use stability, and poor anti-interference characteristics

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