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AMI Smart Meter Reading Solution V200R010C10 Planning and Design Guide

This document describes the overall and detailed design of functions and services in the AMI Smart Meter Reading Solution.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Smart Meter Design Principles

Smart Meter Design Principles

There are various types of smart meters and smart meters support different functions. Smart meters are selected based on the onsite situation and customer requirements. Table 4-4 describes the smart meter design principles and selection factors. The main gateway meter is deployed in the front or rear of a transformer based on power grid requirements. In scenarios of special transformers, public transformers, and industrial users, you can install a gateway meter in the front or rear of a transformer based on the power grid environment. In a transformer substation, you can install a gateway meter in the front of a transformer. In the power distribution room, you need to install a gateway meter in the rear of a transformer. When installing a gateway meter, ensure that auxiliary materials including the PT, CT, power current cables, voltage cables, power cable connection box, and power distribution box are prepared.

Gateway meters use GPRS for communication and support accounting, pre-payment, and post-payment. CL730D21 and CL730D22 series can function as gateway meters. The CL730D21L and CL730D22L meters are installed at the low voltage side in the rear of a transformer, whereas the CL730D21H and CL730D22H meters are installed at the high voltage side in the front of a transformer. The CL730D21L and CL730D22L meters are installed at the inner side of a transformer and connects to the same transformer as DCUs and smart meters, so the CL730D21L and CL730D22L meters can connect to a DCU through PLC.
Table 4-4  Smart meter design principles and selection factors

Scenario

Factor

Selection

Power grid environment

High-density residential communities

Centralized installation of smart meters

Smart meters are installed in a centralized manner, you can select PLC or RF without cabling and select PLC or RF meters. The numbers of gateway meters and smart meters depend on the power grid environment.

Distributed installation of smart meters

There is a high density of smart meters, but smart meters are sparsely distributed. In a short distance, a DCU can use PLC to communicate with smart meters, and smart meters mounted to a DCU must connect to the same transformer. In a long distance where PLC communication effect is not good, it is recommended that RF or GPRS be used to provide reliable communication. If the distance is short and there is a high density of smart meters, use RF; otherwise, use GPRS. Select PLC, RF, or GPRS meters based on the communication mode, and select the numbers of gateway meters and smart meters based on the power grid environment.

Sparsely distributed households

When the distance between households is long, the network construction cost is high and the interference is serious. You can select RF or GPRS. When there is a high density of smart meters, select RF meters; otherwise, select GPRS meters. Select the numbers of gateway meters and smart meters based on the power grid environment.

Industrial users

In an industrial area, there are few users and the cabling cost is high. The distance between smart meters and transformers is long, so PLC is inapplicable. In this case, stable and highly efficient GPRS meters are used to directly communicate with the DCP. Select the numbers of gateway meters and smart meters based on the power grid environment.

Industrial VIP users can support high-voltage and low-voltage meters that support pre-payment and post-payment as needed.

Transformer substation

In a transformer substation, highly efficient, reliable, and stable communication is required. GPRS with high reliability can be used. Select the numbers of gateway meters and smart meters based on the power grid environment.

Commercial users

There are many users, the environment is complex, the coverage is wide, and smart meters are centrally installed and sparsely distributed. In this situation, communication modes can be flexibly selected and different models of smart meters can be used accordingly. Select the numbers of gateway meters and smart meters based on the power grid environment.

Customer requirements

Line loss

The main gateway meter needs to be deployed to perform line loss analysis. Select the number of smart meters based on the power grid environment and deployment.

Electricity theft prevention

The main gateway meter needs to be deployed to perform electricity theft prevention analysis. Select the number of smart meters based on the power grid environment and deployment.

Pre-payment

Remote pre-payment

Select smart meters that support remote pre-payment.

Local pre-payment

Select smart meters that support local pre-payment.

Post-payment

Select smart meters that support post-payment.

Cost

Select a network plan and devices based on actual requirements.

Others

Smart meters that are connected to different transformers communicate with DCUs

RF meters are selected because RF is not limited by transformers and implements communication across transformers.

Outdoor installation

If many smart meters are required in an area but are installed outdoors in a distributed manner, use RF to prevent signals from being blocked. In this situation, the DCUs must support RF.

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Updated: 2019-03-07

Document ID: EDOC1100069579

Views: 6985

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