IS200AEADH4ADA Gas turbine module

The advantage of base loading over droop is that when separating from a Mains, there is no frequency change. Simply removing the bias signal required to maintain the base load reference on breaking from the Mains (mains CB Aux open) returns the system to isochronous load control. The EGCP-2 is only allowed to parallel with the mains in a Mains Parallel operating mode. When configured for this type of operation, the EGCP-2 will operate in either a base load or process control mode while in parallel with the mains. The EGCP-2 automatically switches between base load and isochronous operation depending upon whether or not the Mains Breaker CB Aux input is closed at the same time the Generator CB Aux input is closed. If both the Mains and the Generator CB AUX are closed, then the EGCP-2 realizes it is in parallel with the mains, and operates in a base load control mode. The EGCP-2 will operate in a process control mode, which is discussed later in this section, if both the Process and Run with Load discrete inputs are active (on).

Base Load Against the Mains 

Base Load is a method of setting a base or fixed load on a machine operating in parallel with the mains. The EGCP-2 control operates the generator set in base load whenever the generator is in parallel with the utility, unless a process control mode of operation is selected through the Process discrete input. This is accomplished by using an isochronous load control and providing a reference level at which to control the load. The governor will force the generator output to increase or decrease until the output of the load sensor is equal to the reference setting. The base load reference is set in the Real Load Control tuning menu of the EGCP-2. At this point, the system is in balance.

Automatic Generator Loading Functions 

The automatic generator loading functions of the EGCP-2 control will work with the speed control to automatically control the loading and unloading of the generator. This accomplishes a bumpless transfer when paralleling the generator to a load sharing or infinite bus system, or when separating a generator from a system. Process Control Description The process control function of the EGCP-2 control will control any process where the controlled parameter is determined by the generator load, and the controlled parameter can be monitored as a 4–20 mA or 1–5 Vdc input signal.