Harmonic Distortion in Large-Scale Heat Pump Systems with Active Filters: An Experimental Case Study on a University Campus

A heat pump is an efficient ventilating equipment that has been used more regularly in recent years. However, these devices cause harmonic distortion in the electric grid, which should be controlled based on the standards. This paper investigates the harmonic performance of a commercial large-scale heat pump. In order to limit harmonic distortion, an active filter is also installed at the Point of Common Coupling (PCC) so that it can comply with IEEE 519 harmonic standard. The practical results of an installed active filter in a heat pump substation are also recorded and demonstrated which clearly verifies the necessity of the active filter for a heat pump.