What is the role of microcomputer detuning device in the power system?

Microcomputer detuning devices, also known as microcomputer detuners, are widely used at and below neutral voltage levels, ungrounded or grounded through resistor coils and arc-absorbing coils. Effectively eliminates overvoltage generated during system resonance to maintain system safety. Why do I need to install a microcomputer type detuning device?

　　In the power system, ferromagnetic resonance occurs often cause voltage transformer (PT) burning, explosion and other malicious accidents. The reason is that there are a large number of energy storage components in the power system, such as voltage transformers, transformers, reactors and other inductive components, capacitors, line capacitance to ground, circuit breaker breakers capacitance and other capacitive components. These components form a number of oscillating circuits in series or parallel. In normal steady state operation, it is impossible to produce serious oscillation. However, when a system fault occurs or the grid parameters change for some reason, resonance is likely to occur.

　　Ferromagnetic resonance is formed by the core inductive components, such as generators, transformers, voltage transformers, reactors, dissipative coils and other capacitive components of the system, such as transmission lines, capacitor compensators, etc. to form a common harmonic conditions, excitation of sustained ferromagnetic resonance, so that the system produces a resonant overvoltage. Resonant overvoltage in the power system is very harmful, easy to cause power accidents. So in the power system should be equipped with microcomputer type detuning device.

　　KCXQ microcomputer-based detuning device using 80C196 microcontroller fast, accurate data processing capabilities to achieve Fourier analysis, frequency selection is accurate. Through the collection of PT open delta voltage, all kinds of frequency components of grid resonance can be quickly analysed, and can accurately identify: single-phase grounding, grid resonance. If it is resonance, the instruction issued by the computer makes the detuning circuit put into use, consumes the energy supplied by the power supply to the resonance, suppresses the ferromagnetic resonance over-voltage, realises the rapid solution of the resonance, and perfects the solution of the harmonic amplitude of each harmonic of the grid in the power system.