Click to enlarge 

The diagram above depicts Yan'an 330KV smart substation topology. In the 330KV high voltage part and main transformer part, there are dual redundant networks for both Goose and SV (Sampled Value) network. Two different protection devices are connected to the different networks to achieve full redundancy. In the low voltage part, there is a single Goose network and SV network for a united protection and measuring control device. The whole substation applied 54 SICOM3024PT realizing IEEE1588 v2 precision clock synchronization. This ensures the high reliability of the Busbar Differential Protection.

Kyland's IEEE 1588 v2 successfully solves the following challenging issues:

1. Using an Ethernet network to propagate the timing signals, eliminating the extra cabling requirements of IRIG-B.   
2. Using mechanisms that dramatically increase accuracy by accounting for switching time and peer to peer propagation delays that occur as the timing signals traverse the network, and the accuracy achieves nanoseconds range.
3. Using transparent clocks in Ethernet switches that eliminate the need for end-to-end delay measurement, reducing traffic congestion and eliminating switch jitter.
4. Provides the greatest accuracy of network based time transfer systems that is required for a substation SV process bus.

Outstanding Features in Yan'an 330KV Substation:

• IEEE1588 v2
• Clock synchronization passes through VLANs
• Supports dual GPS clock sources and clock source auto shifting
• EMC industrial level 4
• Zero packet loss
• Exceeds IEC61850 & IEEE1613
• Appropriate division of VLANs according to protection and measuring control logic
• GMRP
• Bandwidth and data transmission optimization - QoS
• Anti broadcast storm according to different data source types

2010, Hebi Qixian Xiaomazhuang 220KV Smart Substation, SICOM3024PT, 32 units  

2010, Luoyang Jinguyuan 110KV Smart Substation, SICOM3024P, 10 units  

2010, Huzhou Xubei 110KV Smart Substation, SICOM3024P, 8 units  

2010, Yunnan Jingdong Puer 110KV Smart Substation, SICOM3024PT, 6 units  

2010, Xinjiang Anningqu 110KV Smart Substation, SICOM3024P, 11 units  

2011, Weifang Yiming 220KV Smart Substation, SICOM3024P, 30 units  

2011, Lanzhou Sanyuan 110KV Smart Substation, SICOM3024PT, 6 units  

2011, Shanxi Yan'an 330KV Smart Substation, SICOM3024PT, 54 units  

2011, Ningxia Zhangzheng 220KV Smart Substation, SICOM3024PT, 29 units  

2011, Chongqing Shuangqiao 220KV Smart Substation, SICOM324PT, 46 units  

2011, Hebei Chengde Nanqu 220KV Smart Substation, SICOM3024PT, 50 units  

2011, Liaoning Chaoyang Mashan 220KV Smart Substation, SICOM3024PT, 34 units  

2011, Qinghai Chengdong 110KV Smart Substation, SICOM3024P, 15 units  

2011, Jiangsu Heqiao 110KV Smart Substation, SICOM3024PT, 6 units  

2011, Chengdu Mumashan 110KV Smart Substation, SICOM3024PT, 11 units  

2011, Xinjiang Qidaowan 110KV Smart Substation, SICOM3024P, 8 units  

2011, Hubei Shiyan Jigai 110KV Hongwei Smart Substation, SICOM3024P, 6 units  

2011, Hebei Handan Jiakou 110KV Smart Substation, SICOM3024PT, 13 units  

2011, Yichun Yifeng 220KV Smart Substation, SICOM3024P, 24 units  

2011, Sichuan Shixun 110KV Smart Substation, SICOM3024PT, 7 units  

2011, Jiangsu Yixing 220KV Smart Substation, SICOM3024P, 12 units  

2011, Qinghai Menyuan 110KV Smart Substation, SICOM3024P, 18 units  

2011, Qinghai Xiewu 110KV Smart Substation, SICOM3024P, 2 units  

2011, Shanghai Huatie 110KV Smart Substation, SICOM3024P, 10 units  

2011, Shangdong Taian 110KV Daogui Smart Substation, SICOM3024PT, 5 units  

2011, Shangdong Taian 110KV Jindou Smart Substation, SICOM3024PT, 7 units