Validation and Demonstration of Control System Functional Capabilities within the IES Plug-and-Play Simulation Environment

Abstract

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Automation of FARM from Alpha Phase to Beta Phase

“…By virtue of the hardcoding in FARM-Alpha, the module is limited to solving the power dispatch problem shown in Figure 1-3 [2] involving three components -the Balance of Plant (BOP), the Secondary Energy Source (SES) and the Thermal Energy Storage (TES) -that participate collaboratively in electricity production and energy storage process. The BOP, the SES and the TES are supposed to meet the time-dependent net demand by maximizing the IES unit profitability, by respecting the limits on the power outputs and energy storage capacity of each unit (Table 1-1) [3].…”

“…Alternative solutions were then investigated. In a previous milestone report authored by ANL project contributors [2], different schemes to decouple explicit and implicit constraints were presented and discussed. Explicit constraints were directly addressed by the HERON power dispatcher, whereas implicit constraints by the FARM validator (Figure 1-1) [2].…”

“…In a previous milestone report authored by ANL project contributors [2], different schemes to decouple explicit and implicit constraints were presented and discussed. Explicit constraints were directly addressed by the HERON power dispatcher, whereas implicit constraints by the FARM validator (Figure 1-1) [2]. When tentative set-points (𝑟 ⃗(𝑡)) are issued to the FARM validator, the margins with respect to the bounds imposed by the implicit constraints are evaluated and returned to the HERON power dispatcher, which re-optimizes the power setpoints during the following iteration.…”

“…An improved version of FARM-based HERON validator that allows the user to specify the IES list of components and/or component configurations was developed (FARM-Beta). When using FARM-Beta as validator, the user can specify the set of parameterized state-space representation matrices [2], implicit operational constraints in the HERON input file, for each component whose power setpoint needs to be validated. In addition to FARM-Beta, the tool to generate parameterized state-space representation matrices from user-supplied data, Dynamic Mode Decomposition with Control (DMDc), was made available in RAVEN as an open-source software (user manual shown in Appendix 2).…”

Control system for multi-system coordination via a single reference governor

“…For example, it might be addressed by splitting the set of constraints where the power dispatcher will take care of the explicit constraints and the saturation effects on the PID controllers will take care of the implicit constraints. Though feasible, this scheme gives a solution that is sub-optimal [2]. In its place, a sanity-check downstream from HERON Power Dispatcher to ensure solutions meet both explicit and implicit constraints has been adopted (Figure 1-1).…”