| Summary: | Tools synchronization is required for MHP parallel operation with PLN's
distribution network or called on the grid system. Conditional of the
synchronization process are the voltage, frequency, phase angle, and phase
sequence between the MHP with PLN's distribution networks should be the same.
In practice, synchronization has some tolerance, such as: MHP generator voltage
must be equal to PLN voltage (max ± 5%). The generator frequency is 0.2%
larger than PLN frequency and the difference angle phase between MHPP with
PLN is approximately 5
0
. The purpose of automatic synchronization tool is to
detect the synchronization conditionals, if the conditionals have been gained,
MHP electricity can be directly connected to PLN�s distribution network which it
also has function as over/under protection tool and over/under frequency.
The first step of this research is making censors for measuring the
parameters of synchronization process. These censors are voltage censor,
frequency censor, and phase angle censor. All censors are controlled by
microcontroller. The measurement result of voltage and frequency are displayed
on LCD. For knowing whether these censors are detected by microcontroller
properly, the measurement result of censors are compared with measuring
instrument. The last step is combining and testing all data in the laboratory. The
electric parameters are measured for the next analysis to know these censors work
properly.
This synchronization tool can connect automatic 3-phase generator with
PLN�s distribution network at voltage difference tolerance of ±5 %, and frequency
difference of 0.2% from PLN�s distribution network. The error percentage
compared to measuring tools is 2.3% for voltage and 0.091 % for frequency. The
testing result as over/under voltage protection and frequency are mean of the error
percentage of trip time for voltage of 0.71% and tip time for frequency of 0.6%.
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