The dissertation is dedicated to developing a method for analyzing the operational efficiency and functionality of a unified power system by creating its simulation model. This model determines changes in the properties of electricity supply and consumption, based on the convolution of criteria analyzing planned and random disturbances, which make possible the breakdown of certain components and nodes, reducing operability.
Chapter 1: Analysis of the Current State of Energy System Operation through Efficiency and Functionality Evaluation under Disturbances
The following results were obtained:
-It was established that many elements of the unified power system, such as transformers, generators, transmission lines, etc., have a long service life but lose efficiency over time and may require replacement or significant repairs. Under dispatch control, not all elements receive regular maintenance, leading to random accidents. Many power systems have outdated equipment and technologies that do not meet modern operational efficiency standards.
-The country faces a significant energy deficit, limiting the development of traditional energy sources and increasing dependence on imports. Renewable energy sources, such as wind power, solar energy, biofuels, etc., constitute a small portion of the country's energy balance. Due to insufficient infrastructure, Ukraine has significant potential for developing renewable energy generation, particularly through solar panels, wind turbines, and biogas plants, which can reduce dependence on traditional sources and improve energy security.
-It was determined that current models and methods of the energy system do not account for scenarios where consumers under consumption management order only the necessary amount of electricity, or the unified power system experiences random disturbances.
Chapter 2: Simulation Model of the Unified Power System for Various Planned Disturbance Scenarios
The following results were obtained:
-The application of graph theory enables the creation of a model of the country's power system structure in the form of a layered graph. This allows complex structural elements such as generating plants, electrical substations, and transmission lines to be represented as nodes and edges in simulation models for analysis, dispatch control, and optimization of their operation.
-For the first time, a simulation model of the power system in the form of a layered graph was proposed, considering the power generated and transmitted through the network, the nominal power and number of transformers at electrical substations, the cross-section, and the maximum transmission capacity of transmission lines. This model allows for determining complex interconnections between its nodes and integrating equipment into the unified power system for analyzing its operational efficiency and functionality.
Chapter 3: Method for Evaluating the Operational Efficiency of the Unified Power System through Parameter Convolution
A method for evaluating the operational efficiency of the unified power system was developed based on its simulation model for analyzing its operation using the convolution of individual criteria. The scientific results of the third chapter can be considered:
-Further development of the method for evaluating the operational efficiency of the power system, based on the volumes of electricity supply and consumption. The possibility of considering the volumes of electricity that need to be additionally sourced from another power transmission organization, akin to a credit banking system, to meet consumer needs was added.
-A generalized indicator of the convolution of individual criteria, namely the volume, quality, and efficiency of electricity supply, allowed for obtaining an integral indicator for consumers to identify efficient supply among possible alternatives under consumption management conditions.
Chapter 4: Stochastic Model of the Unified Power System and Method for Analyzing Functionality under Probabilistic Disturbance Scenarios
The goal of the dissertation research was achieved. The scientific results of the fourth chapter can be considered:
-A stochastic model of the efficiency and functionality of the unified power system, consisting of its simulation model, the current chain of conversion and transportation objects, a model of random disturbances changing the properties of nodes and edges of the layered graph, and a method for evaluating its operation based on its efficiency and functionality indicators. Additionally, a method for the recursive process of finding paths for obtaining electricity from the consumer object to the power generation equipment was developed.
-Analysis of the functionality conditions of the power system during various operational scenarios, considering potential component failures during random disturbances that lead to equipment breakdowns.
