Stability Analysis of a Run-of-River Diversion Hydropower Plant with Surge Tank and Spillway in the Head Pond

Table 1

Plant dimensions, parameters and base values.

Element	Parameter		Value
Base values	Base head		165.19 m
	Base flow		20 m^3/s
Head pond	Horizontal section		900 m^2
	Spillway length		9.00 m
	Spillway level		450.90 masl
	Water level reference under normal conditions		450.10 masl
	Water level reference under flood conditions		451.40 masl
			0.012
Head race conduit	Length		5201 m
	Section		5.31 m^2
	Losses		13.21 m
	Losses (p.u.)		0.080 p.u.
	Time constant		12.09 s
	Initial head-race conduit flow		1.00 p.u.
Surge tank	Section		9.62 m^2
	Thoma section		9.15 m^2
			1.052
			93.54
Penstock	Length		801.15 m
	Section		5.31 m^2
	Losses		3.45 m
Turbine			0.596
			0.978