Research on Active Noise Control in Power Transformer

Abstract

The problem of noise in power transformer was pay attention to by this paper. The paper presents the design methodology for the active noise control (ANC) of sound disturbances in power transformer. The active noise attenuation algorithm uses the framework of output-error based optimization of a linearly parameterized filter for feedforward sound compensation to select optimal location of sensor and demonstrate the effectiveness of active noise attention in a large power transformer. The ANC controller can automatically measure the sound disturbances and select the compensate parameters to realize the noise cancellation. With 220kV power transformer noise cancellation, for example, the simulating results prove that the ANC technology to cancel the noise in power transformer is an effective way.

An ultra-thin multi-layered metamaterial for power transformer noise absorption

“…Although active noise control methods, which use secondary sources and adaptive control algorithms, have been employed to design sound absorbers, 4,5 the complexity is their main disadvantage making them far from an optimal approach in power transformer noise control. Using an internally synthesised signal, a new method of power transformer noise control was proposed to consider frequency mismatch and secondary delay on the steady-state behaviour of the control algorithm.…”

Position and strength optimization for secondary source of transformer active noise control system

“…With the rapid development of the national economy and the city extensions, the high voltage transmission line is introduced into the urban area, and many large capacity and high voltage power transformers are also entered into the urban area. The noise generated by the normal operation of power transformer will have a serious impact on the daily life and rest of the nearby residents, so people pay more and more attention to the noise pollution caused by this problem [1]. The problem of noise control is becoming more and more important.…”

The Design of Active Noise Control System in Power Transformer

“…Active noise control technology developed in recent years as a method of noise control [3]. Compared to the conventional noise reduction technology, there are several characteristics for ANC technology as follow: good effectiveness at reducing low frequent noise signals; lightweight control system with little bulk; designing and adjusting the characteristics of control system based on the characteristics of noise [4].…”