Introduction
Goal of this document
The goal of this document is to describe a number of architecture related topics for OCPP 2.0.1.
OCPP was originally intended for two way communication between a backoffice, in OCPP the Charging Station Management System (in this document: CSMS) and a Charging Station. The protocol has become more advanced and with every new revision new functionalities and options are added. It has evolved into a protocol that can be used in different architectures for different types of Charging Stations.
This document describes, in addition to the original "simple" setup CSMS <--> Charging Station, a number of topologies as an additional explanation for using OCPP. Furthermore, the Device Management concept to configure and monitor any type of Charging Station, the OCPP Information Model and the 3-tier model are explained.
This document is partially informative and partially normative and is not intended to limit the use of OCPP. However, it does add an explanation what kind of use of OCPP the creators of OCPP had in mind when creating this version of the specification. This document is therefore also intended to support the reader of the protocol specification in Part 2 of OCPP to understand how it can be used.
Terms and abbreviations
This section contains the terminology and abbreviations that are used throughout this document.
Terms
| Term | Meaning |
|---|---|
| Charging Station | The Charging Station is the physical system where EVs can be charged. A Charging Station has one or more EVSEs. |
| Connector | The term Connector, as used in this specification, refers to an independently operated and managed electrical outlet on a Charging Station. In other words, this corresponds to a single physical Connector. In some cases an EVSE may have multiple physical socket types and/or tethered cable/Connector arrangements(i.e. Connectors) to facilitate different vehicle types (e.g. four-wheeled EVs and electric scooters). |
| EVSE | An EVSE is considered as an independently operated and managed part of the Charging Station that can deliver energy to one EV at a time. |
| Local port Smart Meter | The Local port on a Smart Meter is a port (for example serial) on a digital electricity meter that provides access to information about meter readings and usage. |
Abbreviations
| Abbreviation | Meaning |
|---|---|
| DSO | Distribution System Operator |
| CSO | Charging Station Operator |
| CSMS | Charging Station Management System |
| EMS | Energy Management System. In this document this is defined as a device that manages the local loads (consumption and production) based on local and/or contractual constraints and/or contractual incentives. It has additional inputs, such as sensors and controls from e.g. PV, battery storage. |
| EVSE | Electric Vehicle Supply Equipment |
| LC | Local Controller. In this document this is defined as a device that can send messages to its Charging Stations, independently of the CSMS. A typical usage for this is the local smart charging case described in the Smart Charging chapter of Part 2 of OCPP, where a Local Controller can impose charge limits on its Charging Stations. |
| LP | Local Proxy. Acts as a message router. |