**6. Conclusion and future work**

246 Electrical Generation and Distribution Systems and Power Quality Disturbances

wares by executing more developed application programs that are shown in Fig. 12 and Fig. 13. The examples of the experimental result, that the data file is saved in the form of bitmap file (.BMP format) by the application program of Fig. 14, is illustrated in Fig. 15, Fig. 16 and

Fig. 16. Zoomed signals of voltage sags from Fig.15(a)

Fig. 17. Interruption on phase A (measured on a single phase system)

Fig. 17.

A power quality monitoring system via the Ethernet network based on the embedded system has been proposed in this chapter in order to monitor the power quality in case of faults detection and also to measure voltage and frequency in power lines. ADUC7024 and LPC2368 of ARM7 microcontroller are selected to apply in the power quality monitoring system for not only detecting the fault signals that cause any problems in either the system or the end user equipment but also reading and writing them in real time of power fluctuation. Moreover, the fault signal data can be sent and stored in SD-CARD to display later on the screen of PC or laptop at the site place. However, the users can download and analyze the fault signal data which have already sent and stored in SD-CARD via the Ethernet network using TCP/IP and UPD protocol at some other time when of necessity needed.

For future work, the researchers tend to substitute ARM7 with ARM9 in order to monitor power quality and to detect the transient in power lines. In any case, the researchers have always concerned with the same primitive ideas and objectives.
