کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
172124 458520 2016 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimal response under partial plant shutdown with discontinuous dynamic models
ترجمه فارسی عنوان
پاسخ مطلوب تحت خاموش شدن بخشی از کارخانه با مدل های پویا متلاطم
کلمات کلیدی
بهینه سازی پویا، خاموش شدن جزئی برنامه ریزی عدد صحیح مختلط، بهینه سازی چند منظوره، کنترل پیش بینی مدل، کنترل فرایند
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Mixed-integer formulations for modeling discontinuous phenomena in partial plant shutdowns.
• Posed as mixed-integer dynamic optimization, with economic or restoration time objectives.
• Multitiered optimization for handling competing objectives and solution nonuniqueness.
• Embedded within a model predictive control framework for closed-loop implementation.

This work describes mathematical formulations for modeling aspects of partial shutdowns in multiunit plants. The specific type of partial shutdown considered is one that permits the decoupling of affected units from the rest of the plant, thus enabling continued plant operation, albeit in a more limited fashion. Parsimonious and computationally efficient mixed-integer formulations are presented for specific discontinuous phenomena that arise in partial shutdown modeling, such as shutdown thresholds, induced shutdowns, discontinuous costs, and minimum shutdown durations. It is demonstrated that induced shutdowns (secondary shutdowns triggered by the original shutdown) can be correctly penalized in the objective by capturing the shutdown's true discontinuous economic cost. The computed optimal solution is implemented in closed-loop by employing a multitiered model predictive shutdown controller, in which a discrete-time mixed-integer dynamic optimization (MIDO) problem is embedded. Both objectives of maximizing economics and minimizing restoration (shutdown recovery) time are considered.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Chemical Engineering - Volume 86, 4 March 2016, Pages 120–135
نویسندگان
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