MERLIN was initially developed in the summer of 1989. George Hart, excimer laser co-inventor and currently a Pentagon contractor, performing work related to interceptor laser-based radar development. It was created by Boston-based futurist Paul Guercio, the nationally-respected time pattern researcher and physicist Dr. Here substation level data acquisition architecture is used to describe the physical connection of devices and the flow of data within the system whereas, communication protocol is the language utilized to communicate information over the network.ABOUT MERLIN MERLIN is a computer-based forecasting technology that combines equations derived from planetary time cycles with past historical data and blends that information into a chronograph or "timetrak®" that plots the timetable of future events. Both of these issues impact the overall substation level data acquisition with respect to fidelity, latency, and reliability. The substation level data acquisition system transmits data from the UGPSSMs (Universal GPS time-synchronized meters) to the control house.
This functionality can be performed via multiple architectures.
Three such architectures will be described in terms of the flow of data in a typical substation. The three architectures described are: point to point, networked, and wireless. In the proposed substation of the future all collected data is initially processed via universal global positioning satellite (GPS) time-synchronized meter (UGPSSMs). The UGPSSM device is similar to the IEC 61850 merging unit. The processing of each UGPSSM is to sample, digitize, and GPS time-stamp all substation data. Substation Level Data Acquisition Architecture Overview.Substation Level Data Acquisition Architectures.IEC 61850 Substation Level Data Acquisition Overview.This article describes the functionality and proposed hardware of the UGPSSM. In Figure 2 each the relays and PMUs provides additional data to the station bus including voltage and current magnitude, root mean square, etc. This additional data requires multiple sampled data point – e.g.
#TIME TRAKS MERLIN PROJECT 13 PERIODS FULL#
#SUBSTATION OPTICAL ISOLATOR FULL#Ĭomputing the magnitude from sampled data requires a full period of samples. Thus, the station bus transmits data significantly slower than the process bus. This allows a networked architecture at the station bus. In Figure 2 above the station bus facilitates data flow between all substation IEDs, substation control computers, and GATE hardware. Key advantages of the HardFiber system include: This allows inter IED messaging, human machine interfacing, and communication with external stakeholders. Prefabricated off the shelf components.Engineering, installation, commissioning, and operating utilized existing skill sets.GE UR-series relays and other 61850 compatible IEDs can be utilized and.Different IEDs can record sampled data at independent sampling rates.IEC 61850 allows for legacy equipment to operate within the same substation with newer equipment. This is shown in Figure 2 where Relay A and PMU A monitor voltages and currents via analog instrumentation channels. However, this type of networked communication requires an additional component impacting the reliability of the communication system.įurther, the switching communication increases the latency of the data flow. The networked architecture has considerable market share of industrial and commercial communication infrastructure. The reliability and latency of this form of communication is questioned for the hard real-time systems utilized in power system automation.Īdvantages of networked architecture includes: The use of networked communication infrastructure in substation environment is limited.
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