Abstract
This paper studies how to publish the change events of CIM model using OPC UA, and proposes a method to publish CIM model change events using OPC UA based on mapping CIM model to OPC UA address space. By comparing with the CIS GDA model change notification service function in the legacy CIS interface, it is confirmed that the OPC UA service completely covers the original CIS GDA model change notification service function. Base-Model-Change-Event-Type and the more detailed General-Model-Change-Event-Type, Semantic-Change-Event-Type are used to provide appropriate model change information for clients through OPC UA Event service. CIM model change events in data platform of distribution grid and utilization system are published using OPC UA, the research results have been verified.
Highlights
The IEC61970, IEC61968 and IEC62541 series standards developed by the International Electrotechnical Commission (IEC) have been widely used in the power industry
The data platform of distribution grid and utilization system of Guangdong Power Grid is built entirely on international standards, mainly including two aspects: 1) information model, the Unified Information Model of Distribution and Utilization system (DUUM), is based on IEC TC57 Common Information Model (CIM); 2) data is provide through OPC Unified Architecture (OPC UA), the new version of Component Interface Specification [1]
3.1 Event service of Component Interface Specification (CIS) GDA In the first version of discarded CIS services, the GDA Event Service defined in IEC 61970 403 Generic Data Access (GDA) gives a standard way of publishing CIM model change events
Summary
The IEC61970, IEC61968 and IEC62541 series standards developed by the International Electrotechnical Commission (IEC) have been widely used in the power industry. The data platform of distribution grid and utilization system of Guangdong Power Grid (referred to as DUSYS) is built entirely on international standards, mainly including two aspects: 1) information model, the Unified Information Model of Distribution and Utilization system (DUUM), is based on IEC TC57 Common Information Model (CIM); 2) data is provide through OPC Unified Architecture (OPC UA), the new version of Component Interface Specification [1]. To ensure that platformbased applications can quickly track model changes as platform-managed grid models change, the platform needs to issue model change notifications whenever grid model data changes. That each application can start the corresponding model data synchronization process, tracking grid model changes in a timely manner, and ensure that the grid model data used is complete and correct. A standardized publishing method of CIM model change events is determined, and a software implementation scheme is given
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