Network Planning Methods Research Articles

Study on the planning and scheduling strategies of the hydrogen supply network for road transportation in deep decarbonization scenarios

As the energy decarbonization continues to advance, hydrogen is gaining momentum. With the increasing demand for hydrogen and the lack of hydrogen infrastructure, it is urgent to solve the problem of hydrogen supply network layout planning. In order to reduce redundant construction of hydrogen supply network infrastructure and increase the rationality of its layout, this paper conducts research on the optimal layout planning of hydrogen supply network infrastructure in the transportation sector. By constructing a two-stage real-time scheduling model of hydrogen supply network, the unit cost composition of hydrogen supply network is more complete and accurate, and the location, technology type and quantity of each link of hydrogen supply network are obtained. The results show that the unit cost of China's hydrogen supply network is 27.8 CNY/kg in 2035 and 19.04 CNY/kg in 2050 under the baseline scenario. Compared with the results of existing literature, the two-stage real-time scheduling model can reduce by 7 % of the hydrogen energy supply network unit cost by decreasing the transportation vehicles and the investment capacity of fixed hydrogen storage equipment. The proposed method of the hydrogen supply network planning can provide policy-makers with the selection of sustainability pathways for dynamic hydrogen infrastructure development planning.

A Proposal of Resilient Supply Chain Network Planning Method with Two-stage Stochastic Programming and Latin Hypercube Sampling

A Proposal of Resilient Supply Chain Network Planning Method with Two-stage Stochastic Programming and Latin Hypercube Sampling

Network model optimization of existing mining enterprises to sustain production capacity

The paper is devoted to the sustainability of the production capacities of mining enterprises when extracting minerals. The timely capacity restoration is the main problem for scientists dealing with sustainable development in mining construction. The paper presents the use of network planning and optimization methods of dynamic programming to solve problems of sustaining the existing capacities of mining enterprises. The proposed methods allow for the integrated use of network planning and dynamic programming to optimize the parameters of mining operations. A network model of the technological scheme of mining operations with optimal parameters is proposed. The necessity of timely restoration of capacities of mining enterprises with the use of network planning and mathematical programming methods in solving these problems is highlighted.

Dynamic planning of edge sensing terminals in distribution network supporting distributed resources observable and controllable

With the advancement of low-carbon distribution networks, the heightened stochasticity introduced by a multitude of renewable energy sources in the power grid has significantly augmented the regulatory challenges faced by the power grid. Dispatching distributed resources emerges as an effective solution to this issue. However, these resources often lack observability and controllability, hindering their participation in power regulation services. To establish a reliable interaction between distributed resources and power grids, the deployment of numerous edge sensing terminals becomes essential, albeit incurring high costs. In light of this, our paper proposes a dynamic network planning method for edge sensing terminals based on node differentiation and resource observability criteria, aiming to facilitate real-time and dependable observation of distributed resources. Initially, the node weight, a metric to gauge the disparity among nodes, is computed, considering communication quality deviation, resource development synergy, and the distribution of distributed resources. Subsequently, an optimal configuration method is introduced, accounting for the terminal’s reliability under faults. Lastly, a method for dynamic terminal networking planning is presented, gradually reducing the depth of unobservable resources. An enhanced genetic algorithm is employed to address this challenge. This method was validated using an IEEE 33 node system and a 91 node actual system, demonstrating significant effectiveness in reducing terminal configuration costs.

Research on dynamic robust planning method for active distribution network considering correlation

The universality of load subjects in distribution network brings challenges to the reliability of distribution network planning results. In this paper, a two-stage dynamic robust distribution network planning method considering correlation is proposed. The method evaluates the correlation between random variables using the Spearman rank correlation coefficient, and converts the correlated random variables into mutually independent random variables by Cholesky decomposition and independent transformation; expresses the source-load uncertainty by a bounded interval without distribution, and describes the active distribution network planning as a dynamic zero-sum game problem by combining with the two-phase dynamic robust planning; use the Benders decomposition approach to tackle the issue; mathematical simulation is used to confirm the accuracy and efficacy of the method. The results show that the dynamic robustness planning method of active distribution network taking into account the correlation can accurately simulate the operation of active distribution network with uncertain boundaries, which enhances the reliability and economy of the active distribution network planning results.

Underground Logistics Network Design for Large-Scale Municipal Solid Waste Collection: A Case Study of Nanjing, China

The challenges arising from the management of municipal solid waste (MSW) have a profound impact on the sustainable development of urban areas. As a sustainable solution, the transportation of MSW underground offers the potential to alleviate traffic congestion and reduce environmental pollution. In this study, we propose the implementation of a large-scale underground waste collection system (UWCS). To begin, a comprehensive operational process for the UWCS is designed based on an intelligent technology system, including facility operation, processing workflow, and technical parameters. Additionally, network planning methods for the UWCS are presented. A mixed-integer linear programming model is formulated with the objective of minimizing total cost. This model determines the optimal location and allocation of nodes within the network, as well as the pipeline layout and flow direction. Given the computational complexity, a hybrid optimization method, namely the genetic greedy algorithms and genetic variable neighborhood search algorithms (GGA-GVNS), is devised to obtain high-quality solutions for the model. Finally, to validate the efficacy of the proposed method, a simulation is conducted in the central city of Nanjing, China. The results demonstrate that the implementation of the UWCS network in Nanjing’s city center can yield an annual benefit of USD 5.99 million. Moreover, a sensitivity analysis reveals further MSW management-related insights and long-term planning strategies.

Network Planning Application for Scheduling of Marine Diesel Engine General Overhaul Activities

There are many sub-tasks and tools in general overhaul activities, so that a planned and systematic arrangement are needed. In systematic general overhaul planning can use the Network Planning method. Scheduling by the Network Planning method describes a task into a network. The Network Planning has two commonly used techniques, namely CPM (Critical Method Path) and PERT (Program Evaluation and Review Technique). Therefore, in this study, scheduling will be carried out by the Network Planning method, CPM and PERT techniques. By using network planning in overhaul activities, it is hoped that it will be able to identify deviations and critical paths in the sequence of work processes so as to prevent delays in completing work.

ORGANIZATIONAL AND ECONOMIC SUPPORT FOR THE MANAGEMENT OF INVESTMENT PROJECT IN THE SYSTEM OF FORMING THE POTENTIAL FOR DEVELOPMENT OF THE UKRAINIAN REGIONS

Highlights the current issues of project management in the context of regional development. Using systematic and synergetic approaches, methods of analysis and synthesis, induction and deduction, comparative analysis, it is established that without proper organization of project management it is impossible to effectively use those financial resources invested in regional development. At the same time, the world has long known that their management system is a special area of modern management, the application of which gives tangible both current and future results. Every project in the process of implementation goes through various stages, which together are called its life cycle. And for the implementation of various functions of project management requires appropriate actions, defined as the processes of their management. At the same time, project management is an integrated process: actions (or lack thereof) in one direction affect other areas. This relationship forces a balance between project objectives – often improvement in one area can only be achieved through deterioration in another. At the same time, project management processes can be divided into six main groups, which implement different management functions: innovation, planning, implementation, analysis, management and completion. At the same time, the system of network planning and management methods should be singled out – a set of planning and management methods for economic development and research and development and design and technological work, new products, construction and reconstruction of buildings and structures, overhaul of fixed assets using network schedules used today in the national economу, which gives the opportunity to have a positive impact on the management of investment projects in Ukraine.

Local Grid Planning and Design

This design is based on Etap simulation software to complete the following steps: analysis of original data, determination of power grid voltage level and preliminary selection of power grid connection scheme, technical and economic operation of optimal scheme, operation characteristics and material statistical calculation. Through this design, I have mastered the general principles and common methods of power network planning and design. I am skilled in using Etap simulation software to cultivate my analytical ability in various aspects of technology and economy, improve my ability of calculation, data analysis and arrangement, and design specification compilation.

Аналіз та розроблення концептуальної моделі управління життєвим циклом спеціалізованого програмного забезпечення безпеко-орієнтованого спрямування

A comprehensive examination of the process of developing specialized safety-oriented software is conducted. The incongruity of the presently known development methodologies with the circumstances in which innovative safety-oriented software systems are created is unveiled. For this reason, the purpose of this article is to investigate the existing methods and formulate novel approaches to managing the life cycle of specialized software (safety-oriented services), which are relevant to the specific requirements of the State Emergency Service of Ukraine and align with the principles of a flexible software life cycle management methodology. A thorough exploration is conducted on the current agile methods and approaches employed in the development of critical services, specifically in sectors such as military, railway, aerospace, medical, and other domains of operation. The aim is to establish the merits of flexibility in fostering innovation within specialized safety-oriented software. The fundamental concepts of agile methods for software system life cycle management are synergistically integrated, taking into consideration the unique requirements of rescue service development. Furthermore, the existing empirical data on the feasibility and advantages of implementing agile methods in the security industry are expanded upon. Especially, the agile Scrum method is enhanced through the proposal of employing the mathematical framework of graph theory (network planning method) to automate the planning stage and identify critical functions, including the critical path, the early execution time of events, the late execution times of events, and reserved time for tasks. This method aids in developing a minimum viable product for a safety-oriented system. A conceptual model of the life cycle management process for safety-oriented services has been meticulously developed. This model is predicated on a flexible approach to software development, which aims to automate the tasks performed by project teams and enhance the overall efficacy of specialized software development. On its basis, it is proposed to develop a decision support system for managing the life cycle of safety-oriented software systems development, which is relevant for the State Emergency Service of Ukraine.

ВПЛИВ ТОРГОВЕЛЬНО-ЕКОНОМІЧНИХ ВІДНОСИН УКРАЇНИ І ЄВРОПЕЙСЬКОГО СОЮЗУ НА ВДОСКОНАЛЕННЯ ПРАКТИКИ ІНВЕСТИЦІЙНОГО ПРОЕКТУВАННЯ У КОНТЕКСТІ ЕКОНОМІЧНОГО РОЗВИТКУ ВІТЧИЗНЯНИХ РЕГІОНІВ

This article examines the influence of the trade and economic relations of the European Union and Ukraine on the development of its regions using investment planning. At the same time, with the use of systematic and synergistic approaches and methods of analysis and synthesis, induction and deduction, historical, comparative and content analysis, it was found that relations between our state and the EU were initiated in December 1991, when the Minister of Foreign Affairs of the Netherlands as the presiding state in it, officially recognized the independence of Ukraine in a letter on his behalf. Hover, it was established that without proper organization of both foreign trade and project management, the appropriate use of those resources invested in the development of the region is essentially impossible. Along with this, the world has long known that their management system is a special direction of modern management, the application of which gives tangible both cur-rent and prospective results, and the implementation of various functions with project management requires appropriate actions, which are defined as their management processes. Simultaneously, project management is an integrated process of actions (or lack thereof) in one direction, which affect other directions as well. Such a relationship forces a balance between various project tasks – often an improvement in one of the areas can be achieved only at the expense of a deterioration in some other. At the same time, project management processes can be divided into six main groups, which implement different management functions: innovation, planning, analysis, performance, management and completion. Concurrently, it is worth separately distinguishing the system of network planning and management methods as a set of appropriate methods of planing and management of scientific research, capital repair of the main production facilities, design and technological works and products of a new variety, construction and reconstruction of buildings and structures using those network schedules that are used today in the system of formation of national economic complexes, which has a rather positive effect on the management of investment projects in Ukraine as well.

A Dynamic Evaluation Method for High-Permeability New Energy Distribution Network Planning Considering Multistage Development Trends

With the development of new power systems, high penetration of new energy (HPNE) will become a major feature of power systems in the future. In order to solve the problem that the traditional distribution network planning index makes it difficult to fully consider the impact of new energy access on the distribution network, this paper constructs a distribution network planning evaluation index system considering the characteristics of HPNE, and designs a set of static comprehensive evaluation methods of distribution network planning schemes based on the “over-average penalty” entropy weight method (EWM). At the same time, distribution network planning is a long-term dynamic process, and the static evaluation method makes it difficult to describe the actual situation of the multistage construction process of distribution networks. To this end, a dynamic evaluation method of distribution network planning is proposed, which realizes the comprehensive evaluation of multistage distribution network planning based on dual excitation control lines. Finally, an example of four 10 kV distribution network planning schemes of a power supply bureau are analyzed to prove the effectiveness of the proposed method.

Multimodal route planning using network planning and management method

Multimodal route planning using network planning and management method

Organization of Personnel Training in Universities of Uzbekistan using the Methods of Scheduling and Network Planning in Conditions of Self-Isolation

The need to maintain the rhythm of the educational process in the face of pandemics and other force majeure circumstances, to increase student satisfaction with distance education and their motivation for independent work determine the relevance of the introduction of available methods of structuring, ordering, visualization and optimization of the educational trajectory of mastering the discipline. The purpose of this study is to introduce scheduling and network planning in training personnel in self-isolation. The possibility of presenting the personnel training process as a project with an interconnected set of works and control events, for the management of which it is advisable to use RM tools, is theoretically substantiated. A conceptual model of a calendar-network plan for mastering the LS discipline based on the work program of the LS discipline of the Tashkent State Technical University is presented. A network of control events has been developed that visualizes the composition and procedure for completing intermediate tasks in the discipline for its successful mastering. The proposed methods for managing the content and schedule of a training project can be used to build individual learning paths. Keywords : organization of distance learning, self-isolation, satisfaction with learning, project management, scheduling and network planning, content and schedule management, student motivation, life safety. DOI : 10.7176/JEP/13-11-03 Publication date : April 30th 2022

Development of adaptive mechanisms of budget planning in the field of marketing activities in a turbulent economic environment

The article is devoted to the development of complex adaptation mechanisms in the field of financial planning of the organisation of marketing activities in a turbulent economic model, in which large economic systems have a certain asymmetry of the relationship between the dynamics of the growth of the size of the economy and the transformation of degrees of freedom within the organisation of economic activity. The authors clarified the concept of “planning in marketing activities” in terms of issues related to its adaptation to changing environmental conditions, which made it possible to introduce a modern concept: “flexible digital marketing”. An extensive classification of changes in the field of marketing has been given depending on the level of scale of changes in marketing activity plans at different time stages of planning. The authors propose an updated approach to the organisation of marketing activity planning processes based on network modeling, which is presented as a complex set of knowledge on the transformation of developed strategies and plans of marketing activities to abrupt changes. A classification of network planning methods in the field of marketing activities has been compiled, taking into account hypothetical changes in objects within the framework of developed marketing strategies.

Methods for evaluating technical innovations in the implementation of energy-saving measures in enterprises

The method of calculating the cost of implementing the system of drying of fuel by gases for reduction of expenses of fuel for the TPP-210A boiler unit is proposed. This method allows to determine changes in the technical parameters of the four options for the use of fuel for the unit: normal fuel, without drying, with drying in a closed system, and with drying in an open system (the last 3 options involve degraded fuel). Processed fuel requirement will decrease by 14 %. Project economic efficiency is 0.3 US dollars/US dollars. The project payback period is 3.33 years. Program (Project) Evaluation and Review Technique (PERT) was used as the data collection methodology. The network schedule of the planning process and determination of its design parameters of the energy-saving project development are built. As an additional method for the collection of primary data to calculate the cost, the primary data collection tool ‘1C Enterprise’ software product was used.• To determine the cost of the project, the methodology for estimating the implementation of the project of the gas fuel drying system based on the determination of capital costs and technological capabilities of technical equipment is improved;• It is proposed to use the method of network planning and management in the system of development of energy-saving projects as it allows to determine the design parameters to increase the efficiency of research activities;• This methodology for estimating the technical and economic calculation of the implementation of the project of the gas fuel drying system for cost reduction may be of interest to industrial enterprises and thermal power plants that use steam boilers.

Research and Forecasting of Changes in Baltic Sea Ferry and Cruise Routes

In view of the global recession in the sphere of cruise transportation due to Covid-19, it is necessary to develop new models and methods of route network planning in order to reach the pre-crisis levels promptly. In the article the analysis of the world state of the cruise industry is given, the result of the analysis of the Baltic Sea routes is given. New models in the form of graphs of the organization of sea ferry and cruise networks are considered in the article and changes in them under the influence of external environment are determined. The received models of the organization of sea transport networks have been included into the digital transport model and investigated as applied to the chosen sea passenger port. Based on the developed route models, it is possible to develop an effective decision-making system for forecasting in the sea ferry and cruise transportation market.

SUBSTANTIATION OF THE ECONOMIC FEASIBILITY OF USING AN INNOVATIVE METHOD OF CHESS EDUCATION - OPENING AN ONLINE CHESS SCHOOL

Objective. The objective of the present study if to justify the economic feasibility of opening online chess schools in Ukraine. Methods. In the course of the conducted research, a set of scientific methods was used: methods of scientific generalization and comparison, graphical and tabular methods, methods of building hierarchies (to develop the WBS-structure and OBS-structure of the future online chess school), SWOT analysis (to determine the strengths and weaknesses of the chess online schools), methods of network modeling and planning (for planning operations in time for the opening of an online chess school), methods of evaluating the economic efficiency of projects and methods of constructing the break-even point. Results. Theoretical and practical aspects of the development and introduction of IT technologies in education are considered. The concept of informatization of education and the main directions of its development have been studied, in particular, the assessment of the regulatory and legal framework in Ukraine for the provision of online educational services, the formation of the information culture of schoolchildren and students, and the training of pedagogical staff based on the use of IT technologies has been carried out. The project of an online chess school for children and adults has been developed as an innovative method of teaching chess. On the basis of the conducted SWOT analysis, strengths and weaknesses, as well as opportunities and threats of the project were determined, OBS-, WBS-structures and the matrix of project responsibilities were developed. The list of necessary works for the creation of an online chess school was defined, the calendar plan of the project was built with the help of a network schedule, and the time reserve for the project was calculated. The economic efficiency of the project has been proven by calculating its main financial performance indicators, including net present value. The break-even point of the project was determined and constructed. Reasonable necessary steps for conducting an advertising campaign to promote an online chess school.

A multistage distribution network planning method considering distributed generation active management and demand response

This paper proposes a multistage distribution network planning (DNP) method that considers multiple planning alternatives, the active management of distributed generation (DG) units and demand response in the context of active distribution networks (ADNs). Representative days are selected for the consideration of uncertainties related with load demand and renewable power generation, during the planning period. The proposed DNP method aims at minimising the net present value of the total investment and operational cost. The proposed DNP considers multiple planning alternatives, such as the reinforcement of existing substations and existing distribution lines, the installation of new distribution lines, and the installation of capacitors. Furthermore, the proposed DNP method incorporates the control capabilities of DG active and reactive power output and demand response schemes. A 24-bus distribution network and a 144-bus real world distribution network are used to validate the performance of the proposed method.

Determination of the necessary degree of national programs standardization by network and business planning methods

The article considers the application of methods that make it possible to determine the need for deeper standardization of processes within the framework of the implementation of national programs, based on the influence of the degree of standardization on the time and resource intensity of the implementation of national programs. To determine the impact of the degree of standardization on the implementation time of national programs implementation, it is proposed to use network-planning methods, taking into account the influence of the time required for the development and implementation of additional standards on the implementation of the national program. The impact of standardization on the resource intensity indicators of the implementation of national programs is proposed to be taken into account through the analysis of the dynamics of the amount of finance required for the implementation of the program. For this purpose, it is proposed to use business planning methods, namely: calculation of the costs associated with the development and implementation of additional standards and calculation of the financial benefits from deepening standardization, based on the calculation of the amount of reduction in the cost of financial resources per unit of the result of the national program implementation.