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The hydro-wind-solar hybrid power system of interest is in the upper reaches of the Jinsha River and is composed of the Gangtuo hydropower station, the Wanjiashan solar power station in Yanbian, and the Dechang wind farm. An analysis of the output characteristics of the three stations in the system is carried out. Based on a quantitative analysis of the output complementarity over a year (using a method of Pearson correlation) and a qualitative analysis of the output complementarity in a day, a mode of complementary operation is presented in this paper. On this basis, a real-time model is built using Visual BASIC and used to carry out complementary operational research. As a result, we ascertain the mode of reservoir operation required for a given total load on the power grid, wind power, and solar output. The research reveals the complementarity between the monthly and hourly energy outputs of pairs of the three kinds of energy sources. The complementarity between hydropower and wind power is found to be better than that between hydropower and solar power. Transmitting hydro, wind, and solar power together not only lowers the impact of negative factors but can also improve the efficiency of the energy delivery channels. This may help mitigate the impact on the environment and optimise the energy structure. [ABSTRACT FROM AUTHOR]

According to the mean seasonal and annual precipitation from 30 meteorological stations in the periods of 1961-2008, the precipitation trends are analyzed by using the Mann-Kendall (MK) test in the Jinsha River basin (JRB). Both the temporal and spatial distribution characteristics of precipitation trends in different regions in the JRB are studied for the first time in this paper. There is a slight and insignificant increasing trend in seasonal and annual precipitation except for autumn precipitation, and the annual precipitation has increased by 0.7634 mm yr−1 during the last 48 years. The increasing precipitation trends in spring seem more significant than those in the other three seasons, and autumn is the only season showing a slight and insignificant decreasing precipitation trend. There are more than 80% of stations exhibiting increasing trends for annual precipitation, and it goes to 90% for spring precipitation. The increasing precipitation trends in the headwater and the middle reaches are more dominant than those in the upper and lower reaches. The largest increase magnitude occurred in the less precipitation area, while the largest decrease magnitude occurred in the more precipitation area. The increasing trend of minimum precipitation series and decreasing trend of maximum precipitation series could result in a decreasing trend for the range series in the JRB. In general, the increasing trends of precipitation in the tributary (the Yalong River) are more significant than those in the mainstream (the Jinsha River). The results of this study will provide further knowledge for understanding on the climate change in the JRB. [ABSTRACT FROM AUTHOR]

Jinsha River has very abundant hydro power reservation, ranking first in all the hydro power bases of China. To deliver the 38-GW hydro power from Jinsha power stations by HVDC transmission lines to load centers 1000-2000 km away, it is necessary to determine the right voltage level and the capacity of each bipole. This paper proposes three preliminary power delivery scheme and presents an optimization method for transmission capacity, dc voltage and conductor size. Based on a comprehensive comparison of cost-effectiveness, technical feasibility and network security and stability, it was recommended that the 3 bipolar ±800-kV ultra HVDC (UHVDC) links with rated capacity of 6.4 GW for each link be adopted as transmission scheme of Phase I Hydro Power station on Jinsha River. [ABSTRACT FROM AUTHOR]