Modeling, Simulation, and Control of a Medium-Scale Power System by Tharangika Bambaravanage Asanka Rodrigo & Sisil Kumarawadu

Author:Tharangika Bambaravanage, Asanka Rodrigo & Sisil Kumarawadu
Language: eng
Format: epub
Publisher: Springer Singapore, Singapore

Figure 3.24 shows a single reheat tandem-compound steam turbine model with its (a) turbine configuration and (b) block diagram representation [11].

Comparing the control systems given in PSCAD (Fig. 3.25) and [11] (Fig. 3.26) for a steam turbine, the corresponding time constants and gains were identified. The typical values given in [11] were used in configuring the steam turbine in the power system simulation model (Table 3.14).

Fig. 3.25Generic turbine model including intercept valve effect as given in PSCAD. Where, Cv = Control valve flow area (p.u.), Iv = Intercept valve flow area (p.u.), K = K fraction (p.u.), T4 = Steam chest time constant (s), T5 = Reheater time constant (s), T6 = Reheater/ cross-over time constant (s), T7 = Cross-over time constant (s), PMECHHP = HP turbine power output (p.u.), PMECHLP = LP turbine power output (p.u.)

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