If you want to merge units but can't find any that are failing – which is what happened with this review – you have to choose some metric besides failure.
President Bush said tonight that he would create a Terrorist Threat Integration Center to merge units at the C.I.A., F.B.I. and other agencies into a single government unit intended to strengthen the collection and analysis of foreign and domestic terror threats.
Several testing has been made based on the modelled merging unit (MU) IED within two scenarios.
Generally, one line bay includes 1 merging unit, 1 intelligent terminal unit, 2 line protection devices and 1 BCU.
An FPGA-based (field-programmable gate array, FPGA) digital synchronization approach for merging unit (MU) was proposed, which included oversampling, linear phase-shifting, dynamic interpolation resampling technique.
Furthermore, eye gestures recognition has been carried out by identifying and merging unit saccadic segments in terms of pre-defined time sequences.
Let's assume we want to test the performance of a main 1 protection that receives sampled values from a merging unit.
Some physical devices providing the interface with the substation primary equipment may include both merging unit and switchgear control functionality, plus eventually additional monitoring and recording capabilities.
32 computers are used to simulate the merging units and intelligent terminal units of 32 bays, and 32 computers are used to simulate the protection devices of 32 bays; each merging unit sends 200 bytes of SMV message every 250 µs, each intelligent terminal unit sends 1,024 bytes of GOOSE message every 1 ms, and the network load is proximately 150 Mbps.
As to some power-generation equipments that do not support IEC61850, they can get access to coordination control layer via merging unit, thus the device layer can be modeled as per IEC 61850.
