Abstract
This paper presents the developed Adaptive frequency islanding system for distributed generation energy districts. The research is initiated due to the changes of power system structure, increasing the share of distributed generation. At the same time the existing islanding systems have a number of disadvantages, which leads to generation-shedding of distributed generation objects while allocating them for isolated operation. This is primarily due to the low speed of existing islanding systems. The solution to this problem can be an Adaptive frequency islanding system, which is high-speed and evens out the power balance in the distributed generation energy districts at the time of its allocation to isolated operation. The operating principle of this system is to determine the amount of control actions and their issuance at the substation of distributed generation energy districts based on the assessment of the electric power system mode and energy district real-time parameters.
Highlights
According to world practice, recently there has been a tendency of rapidly growing world energy consumption [1]
The system consists of following elements: measuring unit (MU), transmitter/receiver of SCADA, starting unit (SU), computing unit (CU), control actions distribution unit (CADU), and operating unit (OU) implementing of CA
The calculated amount of CA is sent to the CADU, and redirected them to the SCADA, which issues a command to load-shedding of the corresponding substation by multifunctional system for automatic load-shedding (MSALS)
Summary
Recently there has been a tendency of rapidly growing world energy consumption [1] To solve this problem, in addition to large hydraulic and thermal power plants, distributed generation (DG) objects are actively used. The under-frequency load-shedding (UFLS) is used in the power industry to rescue systems facing extreme disturbances to avoid system collapse This system disconnects consumers to restore the balance of active power in the energy system [5]. Another way to frequency control in distributed generation energy districts during system faults is to allocate such energy districts for isolated operation
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