Abstract
The article provides an analysis of the existing methods of identifying the consumer’s contribution to voltage distortion at a point of common coupling. The considered methods do not allow correctly and fairly determining the source of harmonic distortions, or they have limited application and difficulties in implementation. The paper proposes new methods for determining the source of high harmonics. The developed methods and techniques are based on the analysis of the grid operation modes with two connected consumers using compensating devices, such as reactive power compensation devices and passive harmonic filters. It is shown that the most promising method is the application of harmonic filters, which allows determining the share of the consumer’s contribution to the voltage distortion. The present research is carried out using a computer simulation of the existing electrical grid, to which consumers with nonlinear electric load are connected. These methods can be implemented to assess the power quality and the shareholding of different consumers connected at the point of common coupling. Furthermore, such methods appear to be feasible, as almost every enterprise currently has such facilities in operation.
Highlights
The power quality problem is widespread, since modern equipment based on the operation of semiconductor converter technology is being implemented in many enterprises [1,2].The power quality has a significant impact on the operating conditions of the electrical grid and technological equipment [3,4]
It is known that disturbances of the power quality indicators can occur both due to the fault of consumer and due to the work of third-party energy objects connected to the same point of common coupling (PCC) of the electrical grid
4, and a model was developed in which two industrial consumers were connected to Figure 4, and a model was developed in which two industrial consumers were connected tothe thegrid grid (Figure linear loads, nonlinear loads,loads, and capacitor banks with a series were connected (Figure4).4).The
Summary
The power quality problem is widespread, since modern equipment based on the operation of semiconductor converter technology is being implemented in many enterprises [1,2].The power quality has a significant impact on the operating conditions of the electrical grid and technological equipment [3,4]. It is known that disturbances of the power quality indicators can occur both due to the fault of consumer and due to the work of third-party energy objects connected to the same point of common coupling (PCC) of the electrical grid. In this case, it is difficult to determine the exact location of the distortion source and its contribution to standardized indicators, for example, to the voltage total harmonic distortion factor (THDU ) [7,8]. The operation of technology lines of packaging the manufactured products periodically stopped due to errors detected by devices controlling the power consumption parameters at the electrical feeder
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