MEDIUM VOLTAGE GENERATORS:
Medium (MV) or High Voltage (HV) power generation is typically used where the power rating causes current at Low Voltage (LV) to exceed practical limits. In a practical sense, this occurs when the system capacity exceeds 4000 amps or more. It may also be desirable when power must be distributed to the points at a significant distance from the generator set.
Single generator rated at above 2.5 MVA and paralleling generators rated at above 2 MVA are good examples of equipment that is commonly considered for MV applications. MV alternators are not economical nor practical at less than approximately at 1000 kW. At levels less than 1000 kW, it is probably desirable to consider the use of a low voltage machine with a step up transformer when designing an MV or HV installation.
In the generator systems where the medium voltage alternator is used:
• Conduction losses and voltage drop are reduced.
• The productivity of the distribution system is increased.
• Installation and maintenance costs are reduced.
• Since there is no need for bulky cabling, both the image is intact and the safety is increased.
In Arken Jenerator, such technical infrastructure and engineering projects are taken seriously and after the detailed analysis and evaluations are made, project planning phase is started. As an example of Medium Voltage Generators, prime 8000 kVA 10000 Volt synchronous diesel generator sets with autonomous working and sound proofed canopy can be given as a backup power source to the network energy used in Anatolian Side Justice Complex in Istanbul which works perfectly.
PARALLEL OPERATION
In the case where the power of the electrical load is greater than the generator power generated several generators working together as a single generator to meet the load which is called synchronized or Parallel Operation to the electrical load.
The advantages of using lower power engine are:
1. Low operating cost
2. Low initial setup cost
3. Low maintenance cost
4. Longer system life
5. Flexible use
6. On safety
7. Easy to find spare parts
8. Faster production and delivery time
REMOTE RADIATOR GENERATORS:
ISO852, a standard that defines operation standards of generators, requires that the declared power on the label should be supplied continuously at the ambient temperature of 25°C. Although the generator radiator is stated as 40°C in the specs, alternator copper losses and heat (30%) emitted by the radiation on the engine and exhaust pipes causes the temperature to go above ambient temperature.
This causes a drop of power on the diesel generator. In order to prevent this power drop, radiator system is moved away from the diesel generator and connected directly to the ambient air suction. Thus, if the radiator is designed for 40°C, it will work at this temperature without any power drop.
REMOTE MONITORING
Remote monitoring and control system allows reading all operating parameters and alarm information of generator sets without limitation of distance. Control devices communicate with the outer world by ModBus protocol over RS485 and ethernet ports. SCADA or embedded SCADA systems are used for monitoring. SCADA software is configured to customer needs to work in a desktop computer. Connection with the generator control device is directly via ethernet port or RS485 communication line up to 1250mt. SCADA software can SMS or email in case of failure. SCADA system requires a computer to work, while embedded SCADA system work in a microprocessor device and allows more than one user to connect to the system simultaneously owing to static IP. In case of an alarm, the system informs the preset phone numbers via SMS or sends emails to relevant email addresses.
SPECIAL CANOPY
Special canopy are offered when it is desired to reduce the dimensions of the canopy or special types of containers are preferred depending on the environment or operating conditions or when the room dimensions are not suitable for standard canopy use.