A new method for power quality assessment based on energy space

Existing indices of power quality (PQ) have been used to assess the power quality, however these indices are usually isolated and lack of direct relation to the economic losses of customers. This paper presents a new method for economic assessment of PQ based on energy space. The method not only has relation to existing national PQ standards, but from the energy-consuming angle, the deviation of energy consumption is reflected directly between under actual voltage and under norm voltage. Synthetic PQ assessment is performed from a more macroscopic standpoint and the indices is helpful to quantitatively analyze the effects on customers caused by PQ deviation.