MANAGEMENT OF TECHNOLOGICAL STORAGE FACILITIES AND SALES OF OIL REFINING PRODUCTS

ABSTRACT

The article examines the issues of creating a methodology for justifying the structure of automated systems by technological objects for storing and selling oil refining products, improving the method for displaying the characteristics of functional tasks and corresponding information processes on variables and parameters that characterize the structure of the automation complex of automated systems.

АННОТАЦИЯ

В статье рассматриваются вопросы создания методики обоснования структуры АСУ технологическими объектами хранения и реализации продукции нефтепереработки, усовершенствования способа отображения характеристик функциональных задач и соответствующих информационных процессов на переменные и параметры, характеризующие структуру комплекса средств автоматизации АСУ.

Keywords: oil refining products, conceptual model, expert system, telecommunication environment, transaction, semantic models, sub-process ranking .

Ключевые слова: продукты нефтепереработки, концептуальная модель, экспертная система, телекоммуникационная среда, транзакция.

Introduction. The need to develop an automated control system for technological facilities for storing and selling oil refining products is due to the intensification of the use of modern information technologies in industry. Achieving a competitive advantage in the conditions of a modern dynamic market becomes impossible without ensuring the maximum possible information transparency of activities and making optimal operational and long-term management decisions. Despite significant progress in the field of creating high-tech software and hardware in order to form a unified structure for automated control of technological facilities for storing and selling oil refining products, it is necessary to overcome a number of difficulties, in particular, such as ensuring correct data exchange between disparate applications, i.e. creating a single information space for reliable management of subsystems.

A unified information corporate environment for enterprises performing operations with petroleum products will not only ensure monitoring of the entire production panorama based on, among other things, cartographic information, but will also help overcome the inefficiency of separating tactical and strategic tasks of managing technological facilities. The total annual volume of the motor gasoline market in the Fergana region can be estimated at 360 thousand tons per year, the volume of the diesel fuel market is about 300 thousand tons per year. The conducted analysis of the structure of motor gasoline supplied to the Fergana region showed that high-octane gasoline accounts for about 49% of all motor gasoline supplied. At the same time, in neighboring regions, high-octane gasoline accounts for 66 to 80% of the total volume of gasoline supplied. Consequently, a significant portion of the petroleum products sold in the region (from 17 to 31%, in absolute figures from 60 thousand tons to 110 thousand tons) is illegally brought to high octane numbers.

The development of a method for mapping the characteristics of the FL and the corresponding information processes (IP) onto the variables and parameters characterizing the structure of the KSA includes:

• structuring the task of displaying the characteristics of the FD and the corresponding IP on variables and parameters;

• construction of an Ishikawa diagram characterizing the relationship between the factors determining the structure of the KSA and information processes;

• construction of a similarity diagram to systematize factors;

• construction of a Pareto chart to select the most priority factors.

Formal statement of the problem of finding the minimum of a function   with constraints in the form of equalities and inequalities x has the form: minimize , , subject to constraints < , where - specified restrictions on resource consumption; - efficiency of solving accounting and registration and information and analytical tasks with the structure - rational structure of the application service subsystem KSA; where E is a set of levels of the automated control system for storage and sale of oil refining products; N is a set of types of elements of the KSA structure; A is a set of possible connections between elements of the KSA structure.

The sale of oil refining products includes the following stages:

1. Construction of a model for assessing the cost of the PTC.

1.1. Formation of the dependence of TSS and TRS as a function of their main parameters.

1.2. Construction of an algorithm for solving the problem of constructing a model for assessing the cost of TSS and TRS under conditions of small samples of experimental data.

2. Formation of dependencies for calculating the time of solving the control problem

3. Formation of the target function and limitations of the synthesis of the ACS structure.

4. Selection and justification of the method for solving the optimization problem.  5. Development of a general algorithm for solving the problem of synthesizing the structure of an automated control system.

The calculation of the cost of the PTC is written as follows:

where is the serial value ; serial cost ; costs of purchasing peripheral equipment; - costs of local area network equipment ( ) and other costs not taken into account above; - quantity in the composition ; - quantity in the composition . The conducted analysis of the features of the considered sphere and the specifics of solving such problems shows that the assessment of the nature of the relationship of processes with variables and parameters characterizing the structure of the KSA is implemented in several stages:

Results. The analysis of the mapping of the characteristics of the FD and the corresponding information processes onto the variables and parameters characterizing the structure of the KSA, using the Pareto diagram, show that the following factors (characteristics) should be taken into account when synthesizing the structure: the volume of the hard disk drive, the performance of the central processor of the PTC, information security (in terms of integrity and confidentiality of information). Average time to solve the dominant FD (registration):

where is the average time of automated decision-making on the dominant federal law at the OIV facility for registration; – average time of non-automated solution of the dominant federal law; = 1, if the information technology object is equipped with a software and hardware system; = 0, if the information technology object is not equipped with a PTC.

The average time for solving the dominant federal law at a given level of informatization can be written as follows:

where , is the average time of automated solution of the dominant federal law at the information technology facility of the -th special administrative authority; =1 the average time of non-automated solution of the federal law at the information technology facility of the -th special administrative authority; =1, if the information technology facility  of the -th special administrative body is equipped with a PTC; X. - 0, if the information technology facility of the -th special administrative body is not equipped with a PTC; - the average number of transactions related to accounting for  the -th OIV.

The average time for solving the dominant Federal Law at this level of informatization can be written:

where , is the average time of automated solution of the dominant federal law at the information technology facility of the -th executive authority ; , is the average time of non-automated solution of the federal law at the information technology facility of the -th executive authority; =1, if the information technology facility of the -th executive authority is equipped with a software and hardware system; =0, if the information technology facility of the -th executive authority is not equipped with a software and hardware system; is the average number of transactions related to the preparation of information on technical issues for  the -th executive authority.

The expression for calculating the total average time for solving the dominant problems at each level of informatization is as follows:

where is the priority of tasks solved at the -th level of informatization.

Executing one request to a local database requires sending a volume of data equal to the total volume of the request and the response with the requested data, i.e. the total volume of data sent over the network is equal to  The total amount of data transferred over the network when requesting a file initiated in the node , is equal to and taking into account the file placement matrix of the RDB - Since requests to the file initiated at node arise with a certain intensity , the volume of transmitted data generated by this intensity is equal to

The total volume of data that needs to be sent over communication channels within a unit of time is determined by the formula

                                                                             (1)

the total intensity of requests in a distributed system is determined formula

                                                                                          (2)

based on (1) and (2), the average amount of data required to be sent over communication lines when executing a request in the system is equal to:

                                                                     (7)

However, there are limitations that need to be taken into account:

• each file of a distributed system can be located only on one of the network nodes, therefore

                                                                                  (8)

• the amount of memory for storing files in a node is limited by the value bj

                                                                           (9)

The cost of data transfer is

                                                         (10)

and the total cost of data that must be sent over communication lines between nodes due to the operation of a distributed system during a unit of time is determined by the formula

                                                (11)

The automated control system is designed to monitor statistical reporting of inspections of gas stations and oil depots, and the results of quality control of petroleum products through the use of modern automation tools and advanced IT.

Conclusion: The analysis of the state of the subject area was carried out, including: the system of control and accounting of process parameters, as well as the system of management of technical storage and sale of oil refining products by executive authorities and management bodies; the structure of information flows and the synthesis of the information network of the integrated information processing and management system.

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