ASCUE Project

Contents

1. General provisions

2. Purpose and purpose of creation of automated system of remote readings of devices of commercial energy metering

3. Characteristics of the automation object

4. Metering section and delivery section

5. Points of installation of calculation counters

6. Basic technical solutions for electric power metering automation

7. Selection of technical facilities and their locations

8. Technical facilities of the system measuring channel

9. Metrological support. Metrological characteristics of accounting points. Total error of measuring channel

10. Protection against unauthorized access. Places of visual inspection signs installation

11. Basic solutions for installation works

12. Organization of accounting operation

13. Project Implementation Period

Purpose and purpose of creation of the purpose of creation of the automated system of remote collection of readings of commercial electric power metering devices

The purpose of commercial accounting is to obtain data on the supply of commodity products (electricity, capacity) for the organization of commercial settlements by the subjects of the electricity supply contract and other interested persons.

Purpose.

The automated system for remote collection of readings of commercial energy metering devices is designed for:

1) determining the amount of electricity to be paid (including when using zone and multi-supply tariffs) for settlements between suppliers and consumers of electricity.

2) generation of reliable and operational information on control and accounting of electricity and power tied to a single astronomical time;

3) generation of reliable information on control of electrical network parameters;

4) transmission of information on consumed electricity and power to the dispatch service "Energy" for generation, on the basis of these data, of documents for commercial settlements between the supplier and the consumer of electric energy

5) transmission of information to the upper level of control to determine the amount of electric power to be paid for settlements with the ASCUE Power Plant covers:

• supply inputs of the consumer from the power supply system at the boundary of their balance (power take-off interface)

• computing and communication equipment for transmission of calculated power consumption data to the Control Service of Power Generation and the upper level of enterprise management

Purpose of creation:

• Transfer of measured parameters to the data collection server of the energy supply organization "Energy."

• provision of financial settlements.

• provision of operational control and analysis of power consumption and power consumption modes at the enterprise.

• Eliminate theft and reduce power losses.

Metering section and delivery section.

Delivery section.

A point of supply is a physical point on a network element in which commercial settlement for purchased (delivered) electricity and capacity takes place. The point of delivery usually coincides with the point of the division (boundary) of the company's ownership, but can be adopted differently by agreement of the interested parties.

Delivery section - a collection of all delivery points. The delivery section defines the company ownership boundary.

According to the act of distinguishing between the operational responsibility and the balance sheet belonging of the electric grid and the consumer, the boundary of the balance sheet belonging (delivery section) passes to RP 0.4 kV in TP1 and TP2.

Metering section.

A metering point is a physical point on a network element in which electrical energy (or part thereof) passing through that element is measured. The metering point coincides with the current transformer connection point.

Metering section - a collection of all metering points that ensure the complete observability of commercial electricity flows.

The metering section is defined by the technical assignment for the development of the project based on the statement of company affiliation.

Taking into account the power supply scheme and the balance sheet certificate, in order to optimize the costs of creating and maintaining the system for remote collection of readings of commercial metering devices, metering points (metering section) are selected on the 0.4 kV side in GSh1 and GSh2. Location of metering devices is given in Table 2.

At installation of design means of electric energy metering not at the interface of the networks according to the balance of the sides, the amount of electric energy taken into account by the meters is reduced by the size of technological costs for its transportation.

The percentage of loss of electricity in the networks in the area from the place of installation of electric meters to the interface of the network is determined by the calculation method of the Power Supply Organization together with the Consumer.

Basic technical solutions for electric power metering automation.

The structural diagram of the automated remote sensing system of the readings of commercial electricity metering devices is given in.

The system is two-level.

Metering point level - measuring channel including: current transformers, 0.4kV buses, secondary measuring circuits, counters AV10RALP14B4 380V, 5A.

1. At this level, the mall's energy consumption data is measured, stored and primarily processed.

2. Communication layer, which includes converting and transmitting equipment, (interface converter, modem, power supply units), switched telephone channels.

This level provides data transmission to the "upper" level - the database server of the enterprise Energyt via the switched communication channel of the city telephone network.

Data exchange between levels of the system is carried out by:

1. RS485 network.

2. switched channels of the city telephone network.

Time synchronization is performed from the database server of the enterprise Power supply at the moment of each communication with counters.

Metrological support.

All measuring instruments included in the accounting system must be entered in the State Register of the SI of the Russian Federation in accordance with the "Rules for Accounting of Electricity" and

MI 243897 "GSI. Measuring systems. Metrological support. Basic provisions. "

All measuring instruments included in the metering system shall have valid verification certificates.

The total error of the measuring channel is determined in accordance with RD 15334.0-11.20999. "Recommendations. Automated systems for monitoring and accounting of electricity and power. Typical Procedure for Electric Power and Power Measurements. "

Protection against unauthorized access.

Places where visual inspection signs are installed.

10.1. To protect the information of the hardware and software of the automated system from unauthorized access, in accordance with the requirements of GOST R 5073995, it is necessary to provide:

10.1.1. Differentiation of information access.

• Provided by entering passwords of several levels in counters,

• Registration of events related to information security.

• Event logs are maintained by hardware and software of the automated system.

10.1.2. Provide access only after identifying and entering a personal password.

• Provided by the introduction of passwords assigned by software of the automated system.

10.1.3. Prevents unauthorized configuration changes.

• Provided by the introduction of passwords into the hardware and software of the commercial metering unit.

10.1.4. Protection against data modification via LAN or modem.

• Provided by the introduction of passwords assigned by software of the automated accounting node.

10.1.5. Seal the hardware of the commercial metering unit in the locations provided by the equipment design to prevent access to the housing and terminal blocks.

• In the design of the counter ALFA A1700 is provided by two sealing levels:

The first level - on one of two screws that attach the upper and lower part of the meter housing - is a seal of the state trustee and the manufacturer.

The second level is a folding transparent window on the front panel of the counter and screws for attaching the clamp cover.

• Sealing of test terminal boxes (CICs), through which meters are connected to measuring circuits of current transformers and voltage buses, provides the design of CICs.

10.2. In accordance with the requirements of PUE item 1.5.131.5.26:

- Each installed calculation counter shall have seals with

the brand of the state trustee and the seal of the power supply organization;

- Seals must be installed on the newly installed 3-phase counters

state verification with a longevity of no more than 12 months.

10.3. In accordance with the "Regulation on the Procedure for Inspection and Marking of Special Signs of Visual Control of Electric Energy Metering Tools" (per.N 1636), metering tools must be marked with special signs.

Marking of accounting equipment subject to audit shall be carried out by special visual inspection signs made according to special technology according to the specifications approved by the State Energy Supervision Department of the Ministry of Fuel and Energy of the Russian Federation and RAO UES of Russia.

The protected sign is a special hologram made on a dielectric basis, destroyed at the slightest physical impact and consists of two components: a polymer sheet (substrate) and a protected sign.

Responsible for the installation of special signs of visual control at the means of accounting for electric energy are organizations that supply (sell) electric energy to consumers, and territorial bodies of the State Energy Supervision.

Labeling of electric energy metering facilities should be carried out immediately after the end of the audit conducted by the commission, consisting of representatives of the energy retail organization, the consumer, the territorial body of the Gosstandart of the Russian Federation and the inspector of the State Energy Supervision Agency of the Russian Federation.

The results of the audit shall be drawn up by the "Electrical Energy Audit and Labelling Act."

Places of installation of Signs defined by this project:

- on counters;

- on test terminal boxes;

- on terminals of measuring circuits of current transformers;

In addition, intermediate terminal connections (in metering circuits) that are not protected from unauthorized access must be marked, which must be determined by the commission during the audit process and fixed in the "Act on the Audit and Labeling of Electrical Energy Metering Tools Used to Calculate Electricity Consumption with a Legal Entity."

Places of Signs installation shall be fixed in the above Act and numbered in accordance with it.

Basic Assembly Solutions.

The equipment of the metering unit is located in places that allow maintenance in accordance with the requirements of the operating instructions of these devices .

Connection and disconnection of power supply and grounding circuits, as well as interface circuits shall be performed when power supply is disconnected. Multiple conductors cannot be connected to the same terminal.

The communication cables shall be laid according to the table of connections and connections (cable log).

Alfa A1700 electronic meters shall be installed in metering cabinets in accordance with the available design documentation. Meter installation shall be performed in accordance with the current Electrical Plant Maintenance Rules and Meter Installation Instructions.

Diagram of connection of Alfa A1700 electronic meter to three-phase four-wire network through current and voltage transformers is given in the working documentation drawings and in the meter installation manual.

The 2x2x0.6 CIPEP cable for digital communication channels between counters and modems shall be laid using existing cable channels according to the structural diagram of cable channels and cable log. If possible, do not route the cable along the power cables.

Cables and wires of the same purpose (communication cables, control cables, etc.) laid along the same route, as a rule, should be formed into cable packages. It is allowed to combine cables of various purposes into one package when approaching equipment with a length of not more than 1.5 m. Cables with a larger mass and diameter must be stacked at the bottom of the package.

In clandestine channels, single or packaged cables can be routed without attachment in one of the following ways:

a) by structures (brackets with cantilevers) installed on the side walls of the channel;

b) along the channel bottom (at channel depth not more than 0.9 m). In floor channels cables shall be laid on the bottom without attachment.

Crossing and branching of single cables and packages in the channels shall be performed using steel transition bridges.

Cables and wires connected to the equipment are connected to it through lead-in combs (blocks), connectors or terminals installed on the equipment.

Cutting, termination and connection to equipment or adapters of cables and wires shall be carried out in accordance with the process manuals drawn up taking into account the requirements of GOST and specifications for cables and wires.

The length of the bare part of the core or wire from the end of the insulation to the place of inclusion must be not more than 2.0 and not less than 0.5 mm.

When connecting the shielded cable to the equipment, it is allowed to leave the ends with a length of not more than 25 mm without a screen. At the same time, unscreened ends of strands must be pierced in pairs.

Cable and wire cores, depending on material and section, shall be connected to the equipment in the following ways:

a) single-wire copper with a section of less than 1 mm2 by winding, soldering, and when connecting to the clamp with plate tips;

b) single-wire sections from 16 mm2, and multiple-wire 1.02.5 mm2 under a screw clamp. A clockwise ring must be previously formed at the end of the core; the ends of the strands shall be serviced;

c) single-wire strands with a cross section of more than 6 mm2, and multi-wire strands with more than 2.5 mm2 before connection must be terminated with tips using soldering or pressure testing. It is allowed to connect single-wire strands with cross section of 610 mm2 without preliminary termination by tips, provided that the end of the strand is framed clockwise with clockwise protection from extrusion by shaped washers and from self-screwing by spring washers.

Under one screw clamp, no more than two copper strands can be connected.