Modelling neutral to earth voltage (NTEV) on the commercial building

Power Quality (PQ) problems on distribution system (DS) can be categorized as voltage sag, voltage swell, harmonic, transient and others. Nowadays, due to the nonlinear loads, imbalanced loads, improper wiring and poor grounding on DS, the neutral to earth voltage (NTEV) become issue of the PQ problem. Generally, magnitude of the NTEV is zero value if the system is balance, however it changes to the nonzero value due many factor as mention above. Furthermore, in order to study the effect and factor of commercial building and DS, a reliable model need to be applied. The main contribution of this paper is to determine NTEV and NC magnitude and shape in the DS. Then, this paper presented the model of the three phase four-wire underground cable on the commercial building; the comparison of measurement data and simulation result on the NTEV and NC. This model using XLPE cable as the connection from the transformer to the load, CIM as the load at commercial building, and RLC ground electrode as the grounding system. In order to validated this simulation, the model is tested on the two different data of the commercial building. The simulation results are similar identical with the measurement, even the shape of the NTEV and NC are different. As the conclusion, the objective is to determine the magnitude and shape of the NTEV and NC are successfully done and this model can be used to determine the NTEV rise on the others commercial building and also can be used to study the factor contribution due to elevated of NTEV.