Utilization of the voltage rate to localization of harmonic sources in a power system

Single-Point Methods for Location of Distortion, Unbalance, Voltage Fluctuation and Dips Sources in a Power System

“…[7,34,42,43]. Many other techniques are based on investigation of the "critical impedance" [21], the so-called voltage index value [32][33][34]41], interharmonic injection [42], determining voltage and current relative values [38], etc. Some methods determine the dominant harmonics source together with their quantitative contribution.…”

“…19) -the increase of DE during the disturbance indicates that the disturbance source is located downstream the measurement point. On the other hand, DE decreases if the disturbance source is located upstream the measurement point [33]. The method requires that a threshold value of energy is assumed; since the reliability of results depends on this value, the method works correctly as long as the value has been accurately chosen.…”

“…Often, in the case of a significant level of a disturbance in electrical power system, at the customer's supply terminals, there is a need for locating the source of harmonics (e.g. [7][8][9]14,21,27,[32][33][34][35]38,[40][41][42][43]), voltage fluctuations (e.g. [10-13,36,]), voltage dips (e.g.…”

Harmonic disturbance location by applying Bayesian inference

“…In [8], sensitivity analysis and the minimum variance criterion are utilized to determine the optimal locations of measurement devices for locating harmonic sources. It is proposed in [9], [10], [11], [12] to calculate the harmonic sources of the utility and customer with the measured harmonic impedances at point of connection (PoC). The Norton model is applied to represent the harmonic equivalent circuit.…”

Quality Problems in Smart Networks

“…Power quality monitoring systems have become increasingly sophisticated. Often, in the case of a significant level of disturbance in electrical power system, at the customer's supply terminals, there is a need for locating the source of this disturbance, e.g., harmonics [14][15][16] or voltage fluctuations [17]. This issue gains particular meaning when formulating contracts for electric power supply and enforcing, by means of tariff rates, extra charges for worsening power quality.…”