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综合系数法是以充分利用水能为基点,用水能利用率γ=α·β(α为水量利用系数;β为设备利用系数)反映水能利用的程度,用电站建成后需要偿还的贷款本利S_n=M(1+Yi)(M为电站总投资;Y为施工年限,i为贷款年利率)反映投资的多少.资金回收年限的表达式为?(式中P为每年电能收益;Q为每年运行费).当电站综合系数ξ=γ·e(e=1/T)最大时,电站各项动能经济指标都较佳,由此而得电站装机容量为最优.
The comprehensive coefficient method is to make full use of water as the base point, water use efficiency γ = α · β (α is the water utilization coefficient; β is the equipment utilization factor) reflects the extent of water energy use, with the loan repayments (S = M (1 + Yi)) (M is the total investment of the power plant; Y is the construction period and i is the annual interest rate of the loan.) The expression of the capital recovery period is? Q is annual running cost.) When the comprehensive factor ξ = γ · e (e = 1 / T) of the power station is the maximum, all the kinetic energy indicators of the power station are better, and thus the installed capacity of the power station is the best.