Abstract
The article considers electrical complexes with power plants of small capacity. The influence of power generation sources on short-circuit current distribution has been investigated. Reduced sensitivity of back-up current protection and dependence of current distribution on power plant capacity are revealed. Recommendations for minimizing false operation of short-circuit protection in networks with distributed power generation are proposed. An algorithm for adaptive current protection, which uses graph theory to determine the stages of selectivity of relay protection based on finding the shortest Dijkstra path and calculation of equivalent resistance in networks with multiple sources of power generation, which provides selec-tivity and sensitivity of current protection when changing the generated power of generators and the structure of the distribution network is pre-sented. The algorithm uses communication lines with a central control unit to monitor the distribution network and update the current triggering of the relay protection in accordance with changes in the structure of the power grid. The proposed system is designed so that it can respond to dynamic changes in the structure of the network and the state of operation of power plants. Simulation modeling in the Matlab/Simulink software package was performed and the results of the algorithm are presented.
Highlights
Various types of small power generation sources, better known as distributed generation, are connected to the distribution grid
The positive trend towards a further increase in renewable energy sources in the Russian energy system is supported by many objective prerequisites that have emerged at the current stage of energy development [2,3,4]: the need to provide energy to remote areas; growing shortage of generating and network capacities amid high wear and tear of power system equipment; reduced efficiency of power system operation; limited investments allocated for the reconstruction of existing power facilities and the implementation of new construction
Power system protection is a universal requirement for distribution networks, designed to detect faults and other abnormal operating conditions that could lead to loss of power supply and damage to equipment, which responds quickly if such conditions are detected
Summary
Various types of small power generation sources, better known as distributed generation, are connected to the distribution grid. The positive trend towards a further increase in renewable energy sources in the Russian energy system is supported by many objective prerequisites that have emerged at the current stage of energy development [2,3,4]: the need to provide energy to remote areas; growing shortage of generating and network capacities amid high wear and tear of power system equipment; reduced efficiency of power system operation; limited investments allocated for the reconstruction of existing power facilities and the implementation of new construction. The most promising scenario for the development of Russia’s energy system is the transition to a combination of centralized and distributed power supply systems [5,6]. When power system protection fails to operate, this can have serious consequences for the operation of electrical systems [7,8]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
