IEC 61850-9-2 Process Bus and Its Impact on Power System Protection and Control Reliability
IEC 61850-9-2 Process Bus and Its Impact on Power System Protection and Control Reliability
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IEC 61850-9-2过程总线及其对电力系统保护和控制可靠性的影响
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发表时间：
2007
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影响因子：
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通讯作者：
Ian Ender
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作者：
Ian Ender
分析了IEC 61850-9-2标准最新引入的采样值(SV)过程总线概念。该标准建议将当前硬连线到各种设备(继电器、仪表、IED和SCADA)的电流和电压互感器(CT、PT)输出在电源处数字化，然后使用基于以太网的局域网(LAN)与这些设备进行通信。这种方法对于现代光学CT/PT设备尤其重要，这些设备拥有关于初级电压/电流波形的高质量信息，但为了满足传统的模拟接口要求(5 A/120 V)，往往被迫降低输出信号精度。尽管基于SV的过程总线前景看好，但它带来了一系列与新的基于以太网通信的保护和控制系统的整体可靠性相关的问题。本文介绍了合并单元的概念，分析了过程总线环境下保护系统的可靠性，并提出了一种可用于成功部署该技术的替代方法。比较了与相关设备配置一起使用的多个场景。还确定了各种标准机构需要解决的其他问题，以及SV Process Bus局域网在实时监控应用(变电站HMI、SCADA、工程接入)方面提出的互操作性挑战。
This paper analyzes the Sampled Value (SV) Process Bus concept that was recently introduced by the IEC 61850-9-2 standard. This standard proposes that the Current and Voltage Transformer (CT, PT) outputs that are presently hard wired to various devices (relays, meters, IED, and SCADA) be digitized at the source and then communicated to those devices using an Ethernet-Based Local Area Network (LAN). The approach is especially interesting for modern optical CT/PT devices that possess high quality information about the primary voltage/current waveforms, but are often forced to degrade output signal accuracy in order to meet traditional analog interface requirements (5 A/120 V). While very promising, the SV-based process bus brings along a distinct set of issues regarding the overall reliability of the new Ethernet communications-based protection and control system. This paper looks at the Merging Unit Concept, analyzes the protection system reliability in the process bus environment, and proposes an alternate approach that can be used to successfully deploy this technology. Multiple scenarios used with the associated equipment configurations are compared. Additional issues that need to be addressed by various standards bodies and interoperability challenges posed by the SV process bus LAN on real-time monitoring and control applications (substation HMI, SCADA, engineering access) are also identified.