国密SM2加密在10kV分界开关控制器中的实现

发布时间：2019-01-14 11:43

【摘要】：经过多年的建设,我国已经从过去缺电少电的国家变成了电力充盈的国家。然而在配电网自动化方面,我国还远落后于发达国家。随着十三五规划的开局,配电网自动化建设将迎来高潮。10kV分界开关就是配电网自动化上的一个智能终端设备,分界开关就是电力系统输配电中起控制和保护作用的电力设备。当线路上的某处发生故障时,开关控制器能操作分界开关自动隔离故障区,恢复非故障区的正常供电。为了降低通信在配电网自动化建设中的费用,同时由于用户侧的线路拓扑结构非常复杂,分界开关的安装位置地理分布广泛等原因,并不适宜光纤通信,因此,采用GPRS(General Packet Radio Service)无线公网通信,作为开关控制器和监控系统间的传输通道。然而公网传输的数据容易受到攻击者的攻击,对电力系统造成很大的威胁。为此必须加密开关控制器和监控系统之间传输的数据,在开关控制器和监控系统端都应该配有安全加密模块,采用NXP的一款微处理器LPC1778作为加密模块的控制芯片。依据国家的有关规定,本论文选取SM2椭圆曲线公钥密码算法作为加密算法。首先详细的探讨了 SM2公钥密码算法的内容,工作原理。为了实现SM2算法,设计了底层的大数运算,并在LPC1778开发板上进行了测试。然后利用这些底层运算实现了 SM2算法,最后设计了 10kV分界开关监控系统的安全通信方案。
[Abstract]:After years of construction, China has changed from lack of electricity to power supply. However, China still lags far behind the developed countries in distribution network automation. With the beginning of the 13th Five-Year Plan, the construction of distribution network automation will usher in a climax. The 10kV dividing switch is an intelligent terminal equipment in distribution network automation, and the boundary switch is the power equipment that plays a controlling and protective role in the transmission and distribution of power system. When a fault occurs somewhere on the line, the switch controller can operate the boundary switch to automatically isolate the fault area and restore the normal power supply in the non-fault area. In order to reduce the cost of communication in the automation construction of distribution network, and because of the complex topology of the line on the user side and the wide geographical distribution of the location of the boundary switch, it is not suitable for optical fiber communication. GPRS (General Packet Radio Service) wireless public network communication is used as the transmission channel between switch controller and monitoring system. However, the data transmitted by public networks are vulnerable to attack by attackers and pose a great threat to power systems. For this reason, it is necessary to encrypt the data transmitted between the switch controller and the monitoring system. The switch controller and the monitoring system should be equipped with a secure encryption module. A microprocessor LPC1778 of NXP is used as the control chip of the encryption module. According to the national regulations, this paper selects SM2 elliptic curve public key cryptosystem as encryption algorithm. Firstly, the content and working principle of SM2 public key cryptosystem are discussed in detail. In order to realize the SM2 algorithm, the large number operation in the bottom layer is designed and tested on the LPC1778 development board. Then, the SM2 algorithm is implemented by using these underlying operations. Finally, the secure communication scheme of the 10kV demarcation switch monitoring system is designed.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM76

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