TOSHIBA HC422B N-300 Digital input module

To provide accuracy in the presence of noise and harmonics on the inputs, multiple samples of each waveform over a number of cycles of the input are taken to get the power measurement. The EGCP-2 Control has four core modes of generator load control operation. 

These four modes are: 

• Droop • Isochronous Load Sharing 

• Base Load

 • Process Control The specific mode of generator control that the unit is in at any given time can be monitored on the Control Overview status screen.Here is a description of each of these load control modes, and the various operating states that will put the EGCP-2 into each respective load control operation.

Load Sensor Hardware Description 

The digital load sensor gets timing information from the generator A phase voltage signal. Voltages proportional to the voltage and load current for each phase are routed to the sample-and-hold circuits of the A/D converters. The simultaneous sampled values representing voltage and current are held when a conversion-store signal is received from the microprocessor. Each input is then converted and an interrupt is generated when all inputs are converted. The microprocessor then reads the digital values from A/D registers. This procedure is repeated at regular intervals to provide input for further signal processing.

Droop

 Droop Load Control in the EGCP-2 uses the sensed kW on the generator to provide negative feedback to the speed reference of the speed control governor through the speed bias output. This will result in a decrease in generator frequency as the load is increased while operating as a single unit on an isolated bus. Increasing the Speed Raise input while operating in this manner will increase the speed of the engine gradually, thereby increasing the frequency of the generator set.