Three-phase high voltage power supply design for electrostatic precipitator based on phase sequence self-adaption and redundant spark detection
The three-phase power supply has the advantages of small voltage ripple, balance three-phase load and high output power. It is suitable for application in the large electrostatic precipitators of the sintering machine head and the coal fired boiler. This paper designs the three-phase power supply based on phase sequence self-adaption and redundant spark detection. The winding connection mode of Y-Y and the full-bridge rectification circuit are used. This is beneficial to the energy saving, and the energy saving effect is also analyzed. In addition, the three-phase intermittent control is realized. The comparative experiments of voltage boosting between the three-phase power supply and the single-phase power supply demonstrate that the proposed design is effective.
IAENG International Association of Engineers
A cost effective power supply design proposed for electrostatic precipitators is presented in this article. The cost minimization is done in terms of eliminating the power transformer and reducing power consumed by ESP unit. Usually, transformers are used to boost the voltage level in conventional systems on its input side, which is proposed to be replaced by a combination of a high frequency converter along with a voltage multiplier as modular arrangement. By interconnecting these modules, the desired voltage is built up easily. An intermittent pulse energised supply is developed by the proposed system to avoid back corona and to save energy consumption. This modular arrangement also increases the lifetime of converter switches by reducing the switching stresses developed across it during its high frequency operation and the THD generated is also analysed using FFT analysis. The complete system is designed and analysed using MATLAB SIMULINK.
The Invariance of the Vacuum is the Invariance of the World
The following theorem is demonstrated: If the vacuum is invariant under the group generated by the space integral of the time component of a local vector current, then the Hamiltonian is invariant also. A similar theorem holds for the group generated by the space integral of a space component of a local axial-vector current.