In this paper, an integral-type half-tangent phase locked loop (IHtan-PLL) is presented for power systems with harmonic disturbances. Compared with the traditional Synchronous Reference Frame Phase-Locked Loop (SRF-PLL), the proposed IHtan-PLL has the following advantages: (1) when the frequency occurs a large variation, the SRF-PLL has plenty of oscillations, and a considerable prolonged transient response. Whereas, the IHtan-PLL shows the faster trends, and no oscillation emerges; (2) the IHtan-PLL has a better filtering effect in terms of steady-state when the power system contains harmonic disturbances. Simulation tests are presented to demonstrate superior performance of IHtan-PLL.