The Application Analysis and Network Design of wireless VPN for power grid. Wang Yirong,Tong Dali,Deng Wei

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1 Applied Mechanics and Materials Online: ISSN: , Vols , pp doi: / Trans Tech Publications, Switzerland The Application Analysis and Network Design of wireless VPN for power grid Wang Yirong,Tong Dali,Deng Wei Beijing GuoDianTong Network Technology Co.,Ltd. Beijing, China Keywords: Wireless VPN for Power Grid;Secure Access;VPDN Abstract. With the rapid development of smart grid construction, communication mode size in smart grid business relying on operators 2G/3G wireless network continues to increase. In this paper, first, with a deep study of application, communication requirement and network status in power wireless business, the security risk and defects cannot control in the existing power wireless business are noted. Secondly, wireless VPN target of power grid is innovatively put forward, to achieve the safe and efficient power wireless business hosting, intensive operation and scale development. Once again, the design of wireless VPN for power grid, security access platform, operating platform are made a further analysis and elaboration. Introduction With further promote smart grid, great changes occurred in the power of information and communication professionals network, which including network size, bandwidth capacity, security and stability. Electric power communication backbone optical transport networks and metro optical networks have been developing fast. There are many networking mode of Electric power communication access network, include electricity fiber, 230MHz wireless communications, power line carrier communications, and a variety of public and network communication [1]. Extension of the home terminal communication access network initially formed. Strong and smart grid construction is characterized by "information technology, automation, interactive" Public network operation 2G/3G wireless networks have many advantages, such as the need to deploy, fast access. Relying on 2G/3G wireless network operation in the smart grid communications business scale continues to increase. The rest of the paper is organized as follows. Section 2 describes power wireless applications and communications needs. Section 3 analyzes the conventional power wireless business bearing. Section 4 discusses the power wireless VPN target. Section 5 design of a wireless VPN network power, and then secure access platform, operating platform was introduced. And section 6 is the conclusion. Business Analysis and communication needs The rapid development of wireless communication technology and smart mobile devices, promote the development and application of smart grid business. Now electric power wireless communications business focused on marketing, operation maintenance, materials, production infrastructure and other sectors [2]. The most important application of marketing aspects is the information collection. State Grid Corporation plans in 2014 covering more than 200 million users of electric power consumption data collection system, to achieve regional power users "full coverage, full collection, full cost control." As of May 2013, the system has covered about 140 million smart grid users. Among them, 90% of them use the operation business 2G/3G wireless internet access, the mobile terminal type to comply with dedicated collection terminal of the State Grid Corporation of enterprise standards [3]. State Grid Corporation using electric POS payment (sale of electricity) mobile terminals, real-time solution the problems for owe clients reminder fee and clients restore power promptly after payment. All rights reserved. No part of contents of this paper may be reproduced or transmitted in any form or by any means without the written permission of Trans Tech Publications, (ID: , Pennsylvania State University, University Park, USA-05/03/16,10:58:28)

2 Applied Mechanics and Materials Vols The rapid development of wireless application services put forward new demands for wireless VPN network coverage, Qos, security, mobility [4]. Table 2 divided Electric power wireless business: radio transmitting acquisition, remote control, alarm monitoring, identification and location, business interaction, information dissemination and analysis. Table 2 The demand analysis of bearing power wireless service network Typical business Coverage Qos Security Mobility Terminal Type area Extensive collection Information collection large high high low Concentrator Load control terminal Remote Control Load Control small high high low Monitoring alarms Power quality online testing large high high high Power quality detection device Identification and location Intelligent storage, GPS positioning large high high high RFIDOr GPS terminal equipment interaction Smart electricity small low low low Smart electricity interactive terminals Information dissemination Electric power wireless network status PDA small low low high PDA Conventional electricity wireless business is accessed by GRRS / CDMA mode, through operation business Internet or IP private supporting network. Wireless is accessed to Electric power by way of fiber optic line communication and information within the network or external networks [5]. The following issues exist in the current Electric power wireless business network architecture: The communication channel transfer Qos is not guaranteed. Many business data without used GRE (Generic Routing Encapsulation) or VPDN (Virtual Private Dial Network) technology to build a virtual line through the operation business IP supporting network, it cannot guarantee passage Qos, and there is some business data transmission through the public Internet. Secure access methods are not standardized, some wireless service access information through a secure network with no access platform. Electric power wireless business cannot manage, provincial Electric power company's wireless business network decentralized construction. Many of SDH optical power of information inside and outside line access network. Network management inconsistent, the terminal cannot be achieved, business, transmission of data manageable and controllable. It greatly limited the Electric power scale development of wireless communication services. Power Radio communication service traffic has become the important part of the power information communication network traffic, it has a profound impact to electric power of information and communication network carrying capacity. Meanwhile, the complexity and diversity of the power of wireless communication service also put forward higher requirements to the wireless VPN visible, manage, control capability. Electric power Wireless VPN target Electric power wireless VPN use of power of information and communication network resources, access to the network through the mobile operation 2G/3G, be built into a standardized, end to end, may take possession of reliable wireless virtual private network. It provides a secure transmission channel, with a unified security mechanisms, converged voice, data, image, video and other multi services and applications, scalable, intelligent platform, to achieve company's wireless communications business intensive operations, large-scale development. Wireless VPN for power grid is shown in Figure 1. VPN standardized Electric power wireless business network access, terminal IP address allocation and use, the security mechanisms bring into a unified security system. From the terminal,

2132 Mechanical Engineering, Industrial Electronics and Information Technology Applications in Industry the communication channel, security and other aspects of access platforms for virtual private

Wireless VPN for power grid Terminal layer satisfies professional collection terminals, smart metering, industrial grade PDA, tablet PCs, notebooks and other terminal, secure and flexible access.

3 2132 Mechanical Engineering, Industrial Electronics and Information Technology Applications in Industry the communication channel, security and other aspects of access platforms for virtual private network security protection. Electric power Wireless VPN contains terminal layer, network layer, the platform layer and application layer. Figure 1. Wireless VPN for power grid Terminal layer satisfies professional collection terminals, smart metering, industrial grade PDA, tablet PCs, notebooks and other terminal, secure and flexible access. At the network layer communication network bearing by the power of information and communication networks and operation business 2G/3G radio access networks. It can ensure power wireless VPN network links and the Internet completely be isolated, ensure communication transmission quality and safety of confidentiality. Running a business support platform deployed in the platform layer. Application layer satisfies the following activities: Information collection, mobile payment, mobile recharge and other marketing services; Power transmission line monitoring, mobile operations and other transport inspection services; Material management, material allocation and other materials business; Mobile office and Internet of Things service bearing. Electric power Wireless VPN Network Design In the 27 provincial power company electric power wireless VPN network and China Mobile, China Telecom, China Unicom unified access SDH optical line. Network architecture diagram of wireless VPN for power grid is shown in Figure 2. In the company intranet or extranet business data information accesses the terminal operation business wireless network. Data is encapsulated process to follow different encryption mechanism. Data through the virtual private channel transmission to the destination address deblockin, restore business data format, and then through the line access to corporate information intranet or extranet. Figure 2. Network architecture diagram of wireless VPN for power grid

Applied Mechanics and Materials Vols. 427-429 2133 Provincial access network architecture diagram of wireless VPN for power grid is shown in Figure 3.

4 Applied Mechanics and Materials Vols Provincial access network architecture diagram of wireless VPN for power grid is shown in Figure 3. Figure 3. Provincial access network architecture diagram of wireless VPN for power grid In order to solve the problems of non-corporate information within the network area information collection, mobile terminals operating in a safe way to access information about special network, ensuring information security and data transmission security. State Grid Corporation of secure access platform to take the following measures, including the transmission channel encryption, terminal reinforced anti outreach, border access authentication based on digital certificates, data isolation switching, real-time security monitoring and auditing. Run support platform is the basic power wireless VPN platform. It mainly consists of network resource management and configuration, traffic information management, IP address management, online status query and maintenance, business statistics analysis, fault alarm management. Platform satisfy heterogeneous of Electricity intelligent terminals secure network access and communication needs, to achieve full business end QoS guarantee and promote electricity Things business unified deployment. Conclusion Power Wireless VPN is State Grid Corporation SG-ERP information network expansion in the new situation. That is the company's internal network and external network information extension. It supports the development of the power, and achieved electricity production, transmission, consumption, safe and reliable management of all aspects of information transmission. It promotes grid operation and corporate management of the whole process panoramic holographic perception, information fusion and intelligent management and decision-making. References [1] Amar Patel, Juan Aparicio, Assessing communications technology options for smart grid applications,smart Grid Communications (Smart Grid Comm), 2011 IEEE International Conference on Date Oct [2] Kong Zhen, Yewen Chen, Mobile application technology in the role of a strong and smart grid", "National Grid News" May 22, [3] Rao Wei, Ding Jian Yong, Internet of Things technology applications in the smart grid, Central China Electric Power" [4] Visvakumar Aravinthan, Babak Karimi, Wireless Communication for Smart Grid Applications at Distribution Level Feasibility and Requirements, Power and Energy Society General Meeting, 2011 IEEE. [5] Xu Yijiang, based on 3G wireless VPDN business network design and implementation, environmental early warning and monitoring, October 2010

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