Method and arrangement to control operating conditions in fuel cell device

A control method for controlling operating conditions of a fuel cell device having fuel cells arranged in a stack for producing electricity, the method comprising:

• controlling a load of the fuel cells by determining temperature information of the fuel cells and by arranging the fuel cell device to be parallel connected to an electrical network to provide electrical current to the network;
• producing controllable heat quantities under normal operation conditions and power imbalance conditions through at least one controllable electrical heater;
• controlling the controllable heat quantities and controllable fuel cell quantities, which include at least a portion of air flow to the fuel cells and heat applied to the stack of fuel cells to meet a target value;
• and
• during a power imbalance controlling said at least one controllable electrical heater by deriving heater power based on a power balance of the fuel cell device to operate said heater as a buffer for excess energy of the fuel cell device.

A non-transitory computer readable medium having a program recorded thereon for executing a method for controlling operating conditions of a fuel cell device having fuel cells arranged in a stack for producing electricity, which when the computer readable medium is in communicable contact with a processor causes the processor to execute the method comprising:

• controlling a load of the fuel cells by determining temperature information of the fuel cells and by arranging the fuel cell device to be parallel connected to an electrical network and configured to provide electrical current to the network;
• producing controllable heat quantities under normal operation conditions and power imbalance conditions through at least one controllable electrical heater;
• controlling the controllable heat quantities and controllable fuel cell quantities, which include at least a portion of air flow to the fuel cells and heat applied to the stack of fuel cells to meet a target value;
• and
• during a power imbalance controlling said at least one controllable electrical heater by deriving heater power based on a power balance of the fuel cell device to operate said heater as a buffer for excess energy of the fuel cell device.