Design, Modeling and Evaluation of Protective Relays for Power Systems by Mladen Kezunovic Jinfeng Ren & Saeed Lotfifard

Author:Mladen Kezunovic, Jinfeng Ren & Saeed Lotfifard
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

4.3.4.7 Recommended Solver

Ode45 (Dormand-Prince).

4.3.4.8 Example

The following example shows how the DE_1 block works. Figure 4.19 shows the block diagram for the example. In this case, α = 10°, β = 170°, and the input voltage phasor is 1∠0°. The current phasor, on the other hand, has a constant magnitude of one, but its phase increases. In Fig. 4.20, the results of the simulation are shown. Note that the output is zero, whenever the difference between the voltage and current phases is in the ranges 0–10° and 170–360°. The output is one whenever the relative angle is in the range 10–170°.

Fig. 4.19Example for DE_1 block

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