Common Information Model: Panel Session

EMS-API(energy management system- application program interface) standard IEC61970 has realized seamless integration of EMS application software, but IEC61970 standard covers little about microgrid CIM (common information Model). Therefore, CIM in IEC61970 should be extended for the design of microgrid energy management system based on IEC61970 standard.This paper discusses principles and methods of CIM extension, focusing on CIM extension of wind plant and battery energy storage system. it demonstrates a bidirectional energy dispatching model for battery energy storage system and sets up the CIM for photovoltaic power generation system and fuel cell generating system. Based on all this, the CIM for microgrid EMS is forged and then applied to the practical designing of microgrid EMS.

The rigidity of information technology (IT) has been hindering the development of various businesses regarding energy management systems (EMSs) of power networks, although this area has become more diversified, resulting in changes of elements in the systems due to the introduction of renewable energy (RE) and the new energy industry. In order to effectively accommodate these changes, EMSs should be developed in a structure with a standard-based interface, which can secure interoperability between components in the EMS. In previous studies, the common information model (CIM) proposed by IEC TC57 has been utilized for developing EMSs of power networks, but there are gaps between the existing CIM and an information model for the EMSs of carbon-free island microgrids (MGs), which are a newly introduced form of power network covering multiple islands for reducing carbon emissions. This paper proposes a CIM-based software platform for a carbon-free island MG-EMS to efficiently operate the power network and secure interoperability between components in the MG-EMS. Concerning service restoration of the power network, use cases and business objects representing information exchanged between the components in the EMS are derived, and the existing CIM is extended based on the results of the gap analysis in order to provide necessary information on the MG-EMS. The validity of the proposed platform is verified by exchanging payloads between components in the MG-EMS based on the profile extracted from the extended CIM. Furthermore, the performance of the proposed platform regarding data size and speed of data exchange is presented. Based on the case study results, it is concluded that the proposed platform based on the extended CIM can exchange data between the components in the MG-EMS, achieving reasonable data size and speed of data exchange with the help of the interoperability between components in the carbon-free island MG-EMS.

Smart grids with interoperability improve grid reliability by collecting system information and transferring it to an energy management system and associated applications through a seamless end-to-end connection. To achieve interoperability, it is required to exchange the semantic information within the different domains. The international electrotechnical commission has established the Common Information Model (CIM) tool, which is a standard application programming interface for the exchange of semantic information in power systems. CIM provides a robust framework for accurate data sharing, merging, and transformation into reusable information. However, as CIM provides a basic framework for information exchange, various practical issues arise in establishing an energy management system capable of exchanging information using CIM. This paper aims to offer a comprehensive understanding by summarizing and categorizing the research on the practical use of CIM for interoperability in smart grids. Many papers are analyzed and the issues are classified into CIM extension, harmonization, and validation to address the issues that arise when establishing an integrated information exchange system.

Multi-Agent Model-Based Optimization for Future Electrical Grids

The Common Information Model (CIM) has actually been around for quite a while. To many, the CIM is simply a mechanism to exchange power flow data. However, it has become much more than that. Over the years, it has gradually evolved into a large, complex model that few completely know or understand. The purpose of the panel session is to bring out the ‘other’ aspects of the CIM for people to see and learn. The various panelists will discuss the different aspects of the CIM as it has grown and evolved over the years and be available for general questions on how to use the CIM, whether it has grown too large and complex, etc. The idea is that after attending the two sessions of the panel that audience members will walk away with a better knowledge of the CIM and how it may be useful to their organizations.

Electric power research institute's control center application programming interface proposed the common information model (CIM) as the common information exchange model, which provides an excellent platform for representing the components of a power system. This paper discusses using CIM for data modeling for ship power system analysis. Features include using the CIM to accommodate shipboard power systems. Detailed data models for a pulsed load and an active filter are presented and validated through simulation in Matlab. The general process to extend CIM for shipboard power system is briefly outlined. Further efforts are underway to develop a CIM-based shipboard baseline test case to standardize modeling terminology.

Web-Based Enterprise Management (WBEM) is independent of platforms and managed resources so that it can used to unify storage management. WBEM consists of three components. Common Information Model (CIM) is the main component which utilizes a common data format, language and methodology for collecting and describing storage resources. xml CIM encoding defines the way that represents the CIM classes and instances by XML elements. CIM Operations over HTTP makes CIM operations in an open and standardized environment based on HTTP. In this paper, we propose a novel storage architecture that enhances efficiency of storage management under CIM/WBEM environments namely Scalable Storage Management Architecture (SSMA). SSMA is developed based on OpenPegasus. In addition, SSMA has better delay performance than traditional proxy CIMOM.

Climate modeling is a complex process, requiring accurate and complete metadata in order to identify, assess and use climate data stored in digital repositories. The preservation of such data is increasingly important given the development of ever-increasingly complex models to predict the effects of global climate change. The EU METAFOR project has developed a Common Information Model (CIM) to describe climate data and the models and modelling environments that produce this There is a wide degree of variability between different climate models and modelling groups. To accommodate this, the CIM has been designed to be highly generic and flexible, with extensibility built in. METAFOR describes the climate modelling process simply as activity undertaken using software on computers to produce data. This process has been described as separate UML packages (and, ultimately, XML schemas). This fairly generic structure can be paired with more specific controlled vocabularies in order to restrict the range of valid CIM instances. The CIM will aid digital preservation of climate models as it will provide an accepted standard structure for the model metadata. Tools to write and manage CIM instances, and to allow convenient and powerful searches of CIM databases,. Are also under development. Community buy-in of the CIM has been achieved through a continual process of consultation with the climate modelling community, and through the METAFOR team's development of a questionnaire that will be used to collect the metadata for the Intergovernmental Panel on Climate Change's (IPCC) Coupled Model Intercomparison Project Phase 5 (CMIP5) model runs.

This paper deals with information model for power grid fault diagnosis based on Common Information Model (CIM). Fault diagnosis gains information from topology information and device parameters of primary system grid based on IEC61970 standard and device information of secondary system grid based on IEC 61850. Device information contains information of protection movement wave record and protection configuration. However, the existent CIM can't fully represent power system fault diagnosis information. Thus, it is need to extend CIM. All kinds of information are based on different model, which causes different information standard. In this paper a preliminary study on CIM extensions which is based on power system fault diagnosis, has been proposed to perfect fault information model. On the basis of different standard model, this paper has discussed the theory of coordinating IEC 61850 and IEC61970 standard, and proposed using Web Ontology Language (OWL) based on Extensible Mark-up Language (XML) to the solution of this problem. A fault Information Model is then provided to the fault diagnosis system according to Component Interface Specification (CIS) in IEC61970. After receiving fault information, the fault diagnosis system starts for real-time, on-line fault diagnosis. Fault information model has solved the problem of the deficiency and non-standard of fault diagnosis information, attaining fault diagnosis information integrity and standardization, and making the fault diagnosis result fast and accurate.

WAMS (Wide Area Measurement System) is a newly developed technology, which can provide a reliable guarantee to the simultaneous measurement of power system. But PMU (Phasor Measurement Unit) can not be widely used in power grid now, so it is impossible that WAMS can replace SCADA (Supervisory Control And Data Acquisition) system presently. Hence, how to incorporate WAMS measuring data into other systems including SCADA has become a hot research topic currently especially the data exchange between them. In order to solve this problem, a CIM (Common Information Model)-based information model for WAMS is proposed in this paper according both to IEC 61970: EMS-API (Energy Management System Application Program Interface) part 303 and the principle and the application of WAMS. This paper establishes a new package named WAMS in the framework of CIM and then some extended classes and their attributes along with their relationships are also defined. Finally this paper briefly describes the application of this CIM-based information model by presenting a flow diagram about information integration and utilization between WAMS and SCADA.

One of the key goals of the GridWise Architecture Council that is clearly identified in its interoperability framework is the ability to “bridge between communities with independently evolved understandings”. Perhaps there is no better example of the need for such a bridge than between the two most widely implemented enterprise data models in the electric utility industry, the International Electrotechnical Commission (IEC) Common Information Model (CIM) and MultiSpeak®. Both standards provide critical foundations and guidance for electric utilities in developing application integration strategies. Unfortunately, the two standards have independently developed that guidance, with the goals to serve the differing needs of large and small utilities respectively. Over the last several years there has been an accelerating effort to harmonize the two standards through collaboration between the MultiSpeak Initiative and the IEC Technical Committee 57, Working Group 14 (WG14). This collaboration is given additional impetus by the work of the Smart Grid Interoperability Panel's Priority Action Plans (PAPs) 8 and 14. The intent of this work is develop a bridge between the two standards with the eventual goal of permitting interoperation among MultiSpeak — and CIM-compliant applications. Such interoperation will make it easier for electric utilities to build integrated automation systems that make use of the best of both standards. The first step toward this goal is to create a mapping between the data and messaging models so that a two-way electronic conversion can be created between CIM messages with appropriate CIM payloads and MultiSpeak web service method calls with corresponding MultiSpeak data payloads. A set of IEC standards will be issued to document the mapping. The second step in the collaboration will be the creation of a set of CIM profiles for small utilities that will implement the capabilities inherent in MultiSpeak. The authors will discuss the approach to harmonization that is planned and the progress that has been made towards completion of this important effort.

Managing an IT environment requires the exchange of structured data between different agents. The Common Information Model (CIM) is a comprehensive open standard that specifies how managed elements in an IT environment are modelled as a set of common objects and relationships between them. It has however limited support for knowledge interoperability and aggregation, as well as reasoning. By converting the existing CIM model into a format that can be processed by semantic web tools, these limitations can be overcome. This paper describes how CIM can be converted into a Web Ontology Language (OWL) ontology including constructs for which no obvious direct conversion exists, such as CIM qualifiers.

Over the last decade, the Common Information Model (CIM), as specified by IEC 61970 / 61968, has become an important document format for the storage of power grid data. Its object-oriented design makes it easily maintainable and extensible for many use cases in the energy sector. As a result, more and more power grid analysis and simulation tools allow the import and export of CIM based power grid data. Unfortunately, many of them are proprietary and therefore not convenient in the research area since their component models and numerical back-ends often cannot be modified by the user. Thus, open-source alternatives are in demand, such as simulation environments based on the popular modeling language Modelica. Therefore, this paper presents our approach of a template based CIM to Modelica converter. The usage of templates makes it easily adaptable for the generation of Modelica system models targeting arbitrary Modelica libraries. The presented approach is implemented in an open-source project called CIMverter, evaluated on a real-world case with two Modelica power system libraries, and validated against a proprietary simulation tool.

Common Information Model (CIM) is a well established open standard in the power systems domain due to its common shared vocabulary used to communicate messages between various applications. CIM needs to be extended as and when new business requirements arise. CIM has multiple utilisation in power system application ranging from developing an interoperable software application to a cyber-physical system. The latest power system digital twins' trend to establish smarter energy grids highlights new requirements for CIM utilisation. In this context, this paper presented a comprehensive understanding of advancements in CIM research in segments of power generation, transmission, distribution, electricity markets, and consumers. Further, paper discussed the role of digital twins in the emerging power systems.

Abstract. The Metafor project has developed a common information model (CIM) using the ISO19100 series formalism to describe numerical experiments carried out by the Earth system modelling community, the models they use, and the simulations that result. Here we describe the mechanism by which the CIM was developed, and its key properties. We introduce the conceptual and application versions and the controlled vocabularies developed in the context of supporting the fifth Coupled Model Intercomparison Project (CMIP5). We describe how the CIM has been used in experiments to describe model coupling properties and describe the near term expected evolution of the CIM.