The starting transient and steady state of solid state fault current limiter（SSFCL） incorporated into one-machine infinite-bus system is discussed in details. The charging transient of DC reactor slows the rising rate of line current， and the leakage reactance of the series-coupling transformer and loss of SCR bridge affect the generator load angle and excitation voltage. The smaller the ratio of DC inductance and the system tie-impedance is， the slighter the starting transient impact is， and the lower the coupling transformer leakage reactance， the smaller the influence on the steady state operation. With the designed current-limiting DC inductance， SSFCL has no obvious influence on system operation， and with low leakage reactance coupling transformer or bypass AC inductance， that influence can be even much smaller. All those are confirmed by analysis and simulation.