CONSTRUCTION OF GENERATOR CAPABILITY A CURVES

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DETERMINATION OF GENERATORS POTIER REACTANCE • In Figure 5 is given a dependence of Potier reactance, ce, x p,i pi (Q G ), for generator GTH-360 • The Potier reactance (x p ), is changing when reactive power changes. • These values decrease with increase in load, but • Potier reactance value is greater then leakage reactance, x p,min ≈ 1.1÷1.151.15 x l Figure 5: Dependence of Potier reactance from reactive power, x pi ( x pi (Q G ), and x l = 0.188 > x pmin pi (Q
CONSTRUCTION OF GENERATOR CAPABILITY CURVE • Determination of P-Q curve by a new method • The values of excitation current (I f ) can be calculated using the following expression (which is derived from a triangle OF R F R ', Figure 3): i fR [ i + ( x − x )( s / u)(sin ϕ cos ∂ + cosϕ sin ∂) ] 2 + [( x − x ) ⋅(cosϕ cos ∂ − sin sin ∂ ) ] 2 = ϕ fP d P d P • For given (nominal) value of excitation current (i fn =i fR =Const.) ) • Corresponding values of active power (P Gi ) are calculated, • the independent variable takes the value of reactive load Q Gi ≡ Q Gi,cosφ≈ • For a given value of excitation current I f1,max = 2550A: Gi,cosφ≈0. • the series of given values of reactive and active power were obtained, • the corresponding P-Q dependence is obtained (Figure 6).
Page 1 and 2: CONSTRUCTION OF GENERATOR CAPABILIT
Page 3 and 4: Introduction • Capability curves,
Page 5 and 6: BASIC PRINCIPLES FOR THE DESIGN OF
Page 7 and 8: BASIC PRINCIPLES FOR THE DESIGN OF
Page 9: DETERMINATION OF GENERATORS POTIER
Page 13 and 14: Conclusion • It has been establis
Page 15 and 16: Abstract The author came to the fol
Page 17 and 18: THE POTIER REACTANCE DEPENDENCE ON
Page 19 and 20: DETERMINATION OF POTIER REACTANCE (
Page 21 and 22: Potier reactance dependence on the
Page 23 and 24: Potier reactance dependence on the
Page 25: Thank you for your attention

CONSTRUCTION OF GENERATOR CAPABILITY A CURVES

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