In power system

such problems as weak stability of voltage

insufficient or sufficient reactive power and low power factor of power grid are existed

which affects safe and stable operation of power system.In this paper

the significance of shunt compensation technology in improving stability of power system is described by the authors

the principle of shunt compensation technology in improving system voltage stability is analyzed and a kind of typical TSC+TCR reactive generation model of reactive shunt compensation device is set up. Through switching appropriate number of TSC and TCR

the magnitude of reactive power injected the power grid is changed

and the function feature of TSC+TCR reactive generator is verified.