Transient Analysis

Background

Startups and shutdowns (short-lived, transient conditions) stress power generation equipment differently than steady-state activity. Another style of examination is required to predict faults and decide whether equipment maintenance or replacement is imminent. Transient analysis is ideal for observing equipment like that at peaking power plants, for which the time spent in startup and shutdown may approach or exceed the time spent working at top efficiency.

Avantis PRiSM Transient Analysis

The PRiSM Transient Analysis module lets operators compare data during transient events over time for a unit of equipment and correlate that with data from other points while accounting for factors, such as ambient temperature, to identify performance deterioration.

The PRiSM Transient Analysis module performs analysis at high-speed (e.g., every second) during transient conditions, conserving IT resources. During stable, non-transient states, the module monitors point data at lower resolution (e.g., every five minutes). When PRiSM detects a transient event it retrieves the high-resolution data from the data historian, runs the model analytics and sends alarm notifications, if needed. PRiSM continues doing this until the system leaves the transient state again.

The module allows the creation of additional models designed to run during transient conditions. These models run in parallel with other models as part of the overall PRiSM system. The PRiSM Transient Analysis module can be used to specify one or more conditions that indicate the start and end of the different transients. PRiSM uses these conditions to check for state transitions on the equipment and to perform high-speed data analysis during those transient time frames.

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PRiSM Transient Analysis

The module enables the user to create a unique calculated point for tracking the elapsed time as part of the equipment transient project. This point records the length of time that the equipment spends in a transient state. Reviewing elapsed time is extremely useful when analyzing historic transient data. The elapsed time point is automatically calculated and requires no manual input or setup. Although, like any point and like the transient state itself, its parameters are configurable.

Learn about Wonderware eDNA Transient Recording >>