The main function of the generating set is to start immediately when the power supply is interrupted and to provide a sustained and stable power supply for the load. Uptime Institute is an internationally recognized organization that provides regulations and certification on how to design data center facilities. According to the availability of data center, it is divided into four levels: Tier I (basic type), Tier II (partial redundancy), Tier III (simultaneous maintenance type) and Tier IV (fault tolerant type). The number of devices provided by the data center to provide sustained power and emergency power is an important factor determining which level they belong to.
Requirement of 2 Data Center for generator set
The application of data center continuous power (DCC) in diesel generator industry continues to grow. DCC applications, as an alternative power supply for data processing center (DPCs) power, enable it to meet the reliability and availability requirements of data center facilities.
Uptime Institute stipulates that the emergency power supply should meet Tier I or Tier II, and the replacement power supply shall meet the requirements of Tier III or Tier IV. In order to be considered as an alternative power source and to meet the requirements of Uptime Institute Tier III and Tier IV, the generator must provide sustained power when the main power failure occurs. This means that the capacity of the generator can provide sustained power without time limitation at the required load level. You can choose the best from the following aspects
Power generation unit of data center project:
(1) the reliability of the main grid and the sensitivity of the data stored in the data center
If the main power system reliable enough, or data center data processing sensitivity are low, or not strictly required real-time data can be read, then the percentage of effective data center facilities will be reduced, they will be classified as Uptime Institute Tier I or Tier II. at will according to the standby power generator to generator as the standby power supply, to reduce installation cost.
(2) selection of engine and generator
As the power source of power supply, the importance of self-evident engine; not only to consider the general environmental factors (temperature, altitude), redundant (dual boot motor, dual boot battery, or pneumatic spring, start), ventilation, water heating and other engine; also to combine data center requirements to select the engine and generator. The main engine manufacturer in the power generation industry has released a new power definition data center continuous power (DCC).
Engine production commercial DCC definition to ensure that engine operation is not limited by time and average power percentage. The continuous load capacity, reliability and sudden loading capacity of the generator unit are the core requirements.
(3) intelligent redundant control system
As the brain of power generation unit, the control system shoulders the functions of automatic switching machine, synchronous parallel load, load distribution (power sharing, reactive power sharing), power management, protection, data transmission, etc.. Therefore, the control system should be fully reliable and redundant control (control redundancy, communication redundancy).
Redundant control of 3 generator sets and case analysis
The redundant controller is a hot backup, to prevent the collapse of the system causes the unit can not operate normally, when used in the practical application of the main controller failure when the backup controller can substitute the master with the current working state of the controller, to ensure system reliable operation.
Key control redundancy in the output signal and the input signal and parameter setting; main and standby redundant system controller through CAN bus communication; standby controller through CAN bus with periodic send information to the main controller, in order to assess the main controller state. When the master controller when there is a problem, the standby controller will control the binary output point relay, the moment will be the main switching controller output signal to the standby controller output, the main controller fault to the standby controller input time up to 200ms.
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