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EPON Solutions to Electric Power Distribution Automation Systems in Smart Grid(2)

Solutionto Electric Power Distribution Automation Systems (1)

Similar totraditional EPON networking, the EPON system in this solution is also consistedof three parts: OLT, ONU and ODN. The OLTs and ONUs adopted in this solutionare laid out respectively between the 110KV substations and the 10KV switchingstations. Each OLT of the substation are connected to several ONUs throughfibers and passive optical splitters. Each ONU with dual PON interfaces isconnected to two OLTs through fibers. Thus, a topology characterized by Hand-in-handProtection Shift is established.

Each S8500/P3310 OLT and each substation IP/ATMswitch is connected by a single gigabit Ethernet link or multiple gigabitEthernet links. S8500 OLTs and P3310 rack-mounted OLTs can satisfy the need ofsubstations of different scales.

The user network interfaces of ONUs connect to RTUs, TTUs, Networkingmonitoring ends and PCs. BDCOM ONUs support multiple interfaces such as FE, GE,RS232/485, among which RS232/485 interfaces can be flexibly set.

Solution to Electric PowerDistribution Automation Systems (2)

The OLTs and ONUs adopted in this solution are laid out respectivelybetween the 10KV switching stations and the user side. The substations and the10KV switching stations (Ring Main Units) are connected through two fibers. The10KV switching stations constitute a ring network by two fibers, which realizeself-healing with EAPS technology. Each OLT of the switching station isconnected to ONUs in the user side by fibers and passive optical splitters.Each ONU with dual PON interfaces is connected to two OLTs in the 10KVswitching stations through fibers. Thus, a topology characterized by Hand-in-handProtection Shift is established.

The user network interfaces of ONUs connect to RTUs, TTUs, Networkingmonitoring ends and PCs. BDCOM ONUs support multiple interfaces such as FE, GE,RS232/485, among which RS232/485 interfaces can be flexibly set.