Introduction: Faced with the pressure of power supply, Heilongjiang Provincial Power Company has begun constructing an Energy Management System (EMS) and an Electricity Dispatch Management System (OMS) to integrate power resources and strengthen energy management. Economic development has led to huge energy consumption, and in recent years, energy shortages, especially in the power sector, have become increasingly prominent. How to improve management levels, enhance the scientific nature and accuracy of power dispatch, ensure the quantity and quality of power supply, and reduce the constraints of power supply on economic development has become a crucial issue facing China's power companies. Faced with the pressure of power supply, Heilongjiang Provincial Power Company has begun constructing an Energy Management System (EMS) and an Electricity Dispatch Management System (OMS) to integrate power resources and strengthen energy management. The EMS system enables energy management of a highly computational power grid. The Energy Management System (EMS) is a comprehensive set of computer hardware and software systems that provide data acquisition, monitoring, control, and optimization for the power system control center, as well as transaction plan security analysis services for the power market. Sun Xiaobo, an engineer from the Automation Department of the Heilongjiang Provincial Power Company's Dispatch Center, who is responsible for the system platform construction, explained: To date, the development of power grid energy management systems has gone through four generations. The first generation of systems, developed in the 1970s, was based on dedicated machines and operating systems. The second generation, from the 1980s, was based on general-purpose computers and centralized systems. The third generation, from the 1990s, was based on open distributed systems using RISC/UNIX, employing commercial relational databases and advanced graphical display technology, with richer and more comprehensive EMS application software. The fourth generation, developed in recent years, is characterized by the use of JAVA, the Internet, and object-oriented architecture, comprehensively considering the requirements of safe operation and commercial operation in the power market environment. In the early 1990s, the Heilongjiang Provincial Power Company's Dispatch and Communication Center began using IBM RS6000 servers to build its EMS system. With the continuous development of power production and the increasing automation of power grid dispatching, the EMS system within the Heilongjiang power grid has undergone several upgrades and transformations, and for the past two years, it has consistently used IBM p-series servers for system construction. The systems of the Hegang and Jixi regional dispatch centers, which have already completed bidding and are under implementation, as well as the systems of the Harbin and Jiamusi regional dispatch centers, which recently completed bidding, have all adopted IBM p-series servers, totaling more than 60 servers. The OMS system enhances power grid control and optimizes dispatch management systems and processes. The power system is a critical industry affecting national welfare and people's livelihoods, and applying IT technology to improve power operation is an important means of promoting power reform. Among these systems, the dispatch management system is a large-scale engineering project involving a wide range of business operations and requiring the management, integration, and processing of massive amounts of data. In early 2007, Heilongjiang Power began implementing a more comprehensive and functionally robust OMS system based on its existing Power Dispatch Management Information System (DMIS). To maintain the consistency of various systems, after in-depth investigation and full evaluation, Heilongjiang Power adopted 28 IBM p55Q servers as the core application platform for the dispatch center and various regional dispatch business systems. Sun Xiaobo explained, "We want to take advantage of the opportunity to build the OMS system to closely integrate the Heilongjiang Provincial Power Dispatch Center with the regional power dispatch centers onto the same management platform to strengthen the unified management of the provincial power grid operation." With the large-scale application and development of Enterprise Resource Planning (ERP) systems, integration issues have become an obstacle restricting their maximum efficiency and continuous optimization. This paper proposes an architecture for ERP system integration on an Enterprise Service Bus (ESB) platform that integrates various application integration needs and mainstream application integration technologies, and analyzes the integration mode of the ERP system under this architecture. This integration technology is built on technologies such as SOA and offers greater flexibility, operability, and maintainability than SOA-based integration technologies. 1. ERP System Integration Technology Enterprise Resource Planning (ERP) is a standard for a complete set of enterprise management systems and has seen tremendous development in recent years. Many successful ERP products exist both domestically and internationally, but they haven't fully considered the integration challenges of large-scale applications. On the one hand, ERP systems have become powerful tools for the manufacturing industry to improve management, reduce costs, and shorten delivery times; on the other hand, their traditional, inflexible systems create application silos and data silos within enterprises. Integration with the same ERP product, different ERP products, or other enterprise applications remains a significant obstacle to maximizing the effectiveness of ERP systems. In summary, this manifests in the following aspects: (1) Traditional ERP systems are difficult to adapt to the rapid development of management, the continuous adjustment of enterprise organizational structure, even differentiation and mergers and acquisitions, the restructuring and continuous optimization of enterprise business processes, and the continuous evolution of enterprise management models, all of which require ERP systems to keep up with these changes; (2) The development trend of enterprise applications is gradually becoming integrated and integrated. There are continuous demands for integration within enterprises, between enterprises, and between enterprises and government agencies. Self-contained ERP systems lacking flexibility are difficult to achieve smooth information interaction between suppliers, enterprises, and distributors. There has been a lot of research on the integration problem of ERP systems. The proposed solutions mainly include integration based on data sharing, integration based on message brokers, integration based on service architecture (SOA), and integration based on agent technology. These technologies are relatively free and flexible in implementation, but they also have some disadvantages, mainly including non-standardization, high cost, and difficulty in maintenance. In order to overcome these problems, a new application integration technology called "Enterprise Service Bus" (ESB) has emerged. ESB integrates SOA and Web service technologies into the original Enterprise Application Integration (EAI) technology, providing infrastructure for the integration of distributed applications in a standardized, open, flexible, and economical way. 2. Enterprise Service Bus Enterprise Service Bus (ESB) is an emerging standard that adopts SOA principles to integrate enterprise applications in an implementation-independent manner through event-driven and XML-based messaging engines at a large-granularity service level. The ESB reference architecture was first proposed by IBM, as shown in Figure 1. As can be seen from Figure 1, ESB is a bus architecture where various software modules are loosely coupled and connected as standard services. These services include: interaction services, business process management services, information services, partner services (i.e., B2B services), business application services, and business and data access services (access to legacy systems). The lowest layer of infrastructure services includes security, transactions, and reliable messaging. These infrastructure services are implemented based on standard open specifications; for example, the Web Services Security Specification (WS-security) helps enterprises establish trust alliances, thereby meeting the requirements for trust management and confidentiality between enterprises. The ESB provides three main functions: intelligent routing, data transformation, and events. Through intelligent routing, flexible, content-based, and location-transparent reliable messaging can be achieved between services. Data transformation is a data coordination service that converts data from one format to another while maintaining semantic consistency. Intelligent routing can be considered a broad-based message-based application integration, while data transformation is equivalent to traditional data integration technologies. Finally, loose coupling between services is achieved by building integration on event-based technology. In summary, ESB not only encompasses various integration technologies but also builds upon standard service technologies, introducing a standardized bus to provide loosely coupled, large-granularity enterprise application integration. Its characteristics are suitable for large-scale ERP system integration, providing a new standard system for ERP system integration. 3. ESB-based ERP Integration Structure ERP system integration includes internal and external ERP system integration. Internal integration can be further divided into integration between ERP systems and integration between ERP and other systems. External integration also includes integration with ERP or other systems. The integration structure based on Enterprise Service Bus (ESB) has advantages in handling such complex, large-granular integration. Figure 2 shows an ESB-based ERP system integration structure. The ERP system of organization 1 adopts a functional framework based on a functional module perspective. This ESB-based ERP system integration architecture considers the integration between the ERP systems of three enterprise organizations. Enterprise 1 has ERP, DSS, CRM, and SCM. Integration between its internal ERP systems, and between ERP and DSS/CRM/SCM, is achieved through an internal application and data access bus. Simultaneously, other services, including infrastructure services, support these integrations. Integration between different organizations is achieved through partner services, and the application systems of different organizations are all built on the ESB framework. Integration between ERP systems of different organizations, or between ERP and other systems, is achieved through partner services provided by the ESB. Clearly, partner services shield the specific types of the integrated systems, achieving transparent integration. In the integration architecture shown in Figure 2, the integration work mainly focuses on defining the interfaces of "application and data access services" and "partner services," and all interfaces are registered under the UDDI specification through the SOA architecture beneath the ESB. Clearly, ESB, built upon mainstream application integration technologies such as SOA, Web services, and message queue services, provides a "plug-and-play" application integration model through a service bus with a unified interface. Compared to integration architectures based on SOA and Web services, it is more advanced and represents a comprehensive integration and improvement, offering better flexibility, operability, and maintainability. 4. Conclusion This paper, based on an analysis of the ERP application integration crisis and traditional ERP integration technologies, proposes adopting a new integration technology standard—Enterprise Service Bus (ESB) technology—to integrate ERP systems with each other and with other systems. Then, it designs and analyzes an ERP system integration architecture based on ESB. This method considers various integration needs of ERP systems and is built upon the integration of existing advanced integration technologies. It encompasses existing mainstream integration technologies and features standardization, openness, flexibility, and ease of development and maintenance. Therefore, the method proposed in this paper deserves the attention of ERP vendors and users and is a method with promotional value.