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Installation of the four-converter generalized unified power flow controller (GUPFC) has been scheduled in Sichuan power grid. As a long-distance transmission system, Sichuan system has an undesirable power flow distribution, which has seriously infringed on its security. In this paper, a novel control law for the four-converter GUPFC has been proposed, which not only realizes the desired power flow distribution in Sichuan power gird, but also the voltage control of a substation. Furthermore, based completely on the locally measurable variables, the proposed controller could be very practical. Simulation studies have verified the effectiveness of the proposed controller. Compared with the conventional application of the UPFC, the GUPFC under the proposed controllers have shown great advantages and a very promising future.