43. System requirements

    1. General system requirements

The basis for creating ACSEE SS should be based on open architecture and support for industry standard protocols. Technical and system software must be supported by manufacturers for 10 years from the termination of production.

1. Requirements for the structure and functioning of the system

ACSEE SS is a complex hardware and software that functions as an autonomous system of accounting. ACSEE SS is a system of hardware and software definitions, collection, storage, transmission and display of commercial and technical accounting of electric power.

Normal operation of the system should be automatic data collection, processing and storage of information. In emergencies it is necessary to provide for manual entry and correction of data.

Operation ACSEE SS carried out continuously in real time. The structure of the ACSEE SS shall consist of the following levels of hierarchy:

• on the first sublevel, measurement, (level meters installed at the facilities of accounting) ACSEE substation should be capable of measuring the active and reactive energy and power on the basis of three-phase meters in the forward and reverse directions, the determination of the volume of electricity that enters the network (provided by the network ), consumed for own needs and economic needs of each set time of day, and storage of certain data in the primary database (PDB) counter;

• on the second sublevel (communication) ACSEE should provide read data records of PDB electric power meters and data collection server using the LAN;

• on the third sublevel level of processing and providing information, ACSEE SS must perform the processing of accounting data, which come automatically or by manual input, load them in the server ACSEE for further processing, access to server data ACSEE by staff using a software application automation energy accounting jobs.

Components ACSEE communication sublayer should ensure the collection of information from the counters of electric power metering and transmission of this information to the third sub-layer systems for processing and presentation parameters of electricity metering.

Technical means ACSEE meter sublevels should include:

• current transformers and voltage;

• secondary circuits of switching current and voltage transformers;

• electricity meters.

ACSEE technical means of communication must include sublayer:

• interface converters;

• links;

• means of Telecommunications.

Technical means ACSEE SS level processing of information should include:

• Server data collection and processing;

• Automation of workplace duty Substation.

Information interaction between the components of the system should be carried out in automatic or automatic mode. At the same time for the information exchange between the sublevels of the system should provide the following modes of information exchange:

• periodic data collection from electricity meters;

• collection of data from electricity meters by the operator, including in emergency situations.

Technical solutions for an ACSEE upper levels is determined at the design stage.

In case of failure of communication channels, the individual components of the system shall be capable of automatically switching to a backup channel.

It should be possible to temporarily exclude from the survey of individual energy meters without losing the last of accumulated data.

Diagnosing the system should be carried out periodically in the background automatically recording the diagnostic messages in the message log available for viewing workstations, as well as at the request of the operator.

In accordance with the functional purpose in the process of taking into account the results, ACSEE should be divided into two functional components:

• functional component that ensures the formation and storage of raw data and is classified as a measurement of the ACSEE SS. Measurement of the ACSEE substation consists of current transformers, voltage circuits secondary switching current and voltage transformers, electricity meters, located in the substation. The measuring part should be placed the primary database, which should be the basis of all measurement information ACSEE;

• functional component, which does not participate in the formation of primary data and results in the formation of accounting uses the data from the primary database ACSEE accounting items and is classified as a system of data collection and processing ACSEE SS. ODS should be included all the technical tools that provide information from the accounting items and its subsequent processing, storage and display.

Functional components ACSEE SS must communicate information on the basis of these fundamental provisions:

• measuring part (primary database) - a source of information for measuring data system;

• Data system establishes modes of preparation and collection of measurement data objects and monitors their performance.

ACSEE SS should provide an opportunity to develop in directions:

• increase the degree of automation system functions;

• increase the number of functions;

• improvement of the user interface;

• increase the number of objects and points of delivery;

• expansion of the monitored parameters;

• integration with ACS;

• creation of backup communication channels.