Study On Influence Of Power Quality Disturbance Signal On Energy Saving And Loss Reduction

With the development of power industry and the increasingly large power grid systems, which consume a lot of resources in construction and production operation.The increasing variety of sources of interference in the power grid, so that the quality of power quality decline, grid power loss has caused rising,increased the national implementation of the pressure of the "energy conservation and emission reduction" policy.Power quality has become grid development, the establishment of "resource-saving and environment-friendly" society stumbling block. Therefore, power quality disturbance detection, power quality analysis and calculation of power loss on the grid, and to take appropriate measures to improve the power quality-related issues become particularly important.For grid power loss caused by power quality disturbances detection problem,two new algorithms are proposed in this paper,one is based on wavelet transform and wavelet threshold denoising algorithm,the other is based on the dq transform and sequential morphological filtering algorithm.In order to reduce the noise signal interference on the detection results.This paper propose a new new wavelet threshold denoising algorithm which is between wavelet soft threshold and wavelet hard threshold denoising,this algorithm removes the soft-threshold function reconstruction signal distortion large, hard threshold function poor continuity shortcomings, in removing the noise of signal while well preserved the signal detecting characteristic quantity. By MATLAB experimental verification,the two algorithms can commendable detect the abnormal occurrence and duration of the disturbance signal.For the related issues of electric energy loss in electrified wire netting is affected power quality. This paper analysis the structure of the loss of electrical energy in power grid, analysis the rate of electric energy loss in power grid is affected by low power grid voltage and the frequency offset and the three-phase unbalanced.For the loss is caused by harmonic,there propose one calculation method that is based on harmonic current distortion rate,but the fundamental wave loss is poorly to determine in this method,leading the concrete results is difficult to clear calculate. For this problem,this paper propose a method of calculating harmonic loss this is based on equivalent resistance method,analyzes the harmonic parameters in distribution network of equivalent circuit model of each component,this method is verified that is simple in calculation and the result is reliable by practical examples.In the aspect of improving power quality to reduce power loss,this paper mainly study on the influence of reactive power,and the principle,the effect,the guidelines and measures of reactive power compensation,harmonic suppression techniques, and measures to suppress voltage dips and interrupts these aspects analysis and calculation.