Advanced Process Control for Multi-Unit Plant Optimization

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Solution Overview

Problem

Large scale processing and power generation industries face challenges in achieving optimal operation across multi-unit plants due to fluctuating equipment performance, production demands, and process conditions, which require multidimensional analysis beyond human capability, and current control systems are inefficient in providing holistic control for entire plant networks.

Innovation Solution

A system and method for Advanced Process Control that includes continuous real-time dynamic process simulation, automatic coefficient adjustment of models, automatic transfer function generation, operating mode optimization, and optimal planning and scheduling, relying on accurate process models to determine globally optimal operating points and forecast future conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If continuous real-time dynamic process simulation and automatic coefficient adjustment are implemented, then optimization accuracy is improved, but device complexity increases

Engineering Contradiction:
Improveoptimization accuracyVSAvoidsystem complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The patent creates a virtual copy of the physical process through dynamic simulation models. This virtual model replicates the behavior of the actual multi-unit plant, allowing optimization calculations to be performed on the copy rather than directly on the complex physical system. The simulation model serves as a simplified representation that captures essential dynamics without requiring the full complexity of the real system.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The patent introduces an intermediary optimization system that sits between the control systems and the physical process. This intermediary layer performs multidimensional analysis and determines optimal operating points, acting as a mediator that translates complex process data into actionable optimization recommendations without requiring direct human intervention in the complex analysis.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Measurement precision

If multidimensional analysis is performed to achieve optimal operation, then optimization quality is improved, but ease of operation deteriorates

Engineering Contradiction:
Improveoptimization qualityVSAvoidoperational simplicity
Core Design Contradiction:
Measurement precisionVSEase of operation

Solution Approach 1:

The patent implements self-service through automatic coefficient adjustment and autonomous optimization algorithms. The system automatically adapts model parameters to changing process conditions and independently determines optimal operating points without requiring operator expertise in multidimensional analysis. The optimization system serves itself by continuously learning and adapting to the process dynamics.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces manual operational complexity with automated computational systems. Instead of requiring operators to perform complex multidimensional analysis mentally or through manual calculations, the system uses computer-based optimization algorithms and machine learning models to automatically determine optimal operations, substituting mechanical human cognitive processes with automated computational processes.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Stability of the object's composition

If holistic control for entire plant network is implemented, then process stability is improved, but device complexity increases

Engineering Contradiction:
Improveprocess stabilityVSAvoidcontrol system complexity
Core Design Contradiction:
Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the plant network into multiple controllable units or zones, each with its own optimization considerations. The holistic control system coordinates these segmented units to achieve overall plant stability. This segmentation allows the complex control problem to be broken down into manageable sub-problems that can be solved and coordinated systematically.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent implements a universal optimization platform that can control multiple different units and processes across the plant network. This multi-functional system handles diverse process conditions and unit types through a unified control architecture, achieving holistic control without requiring separate specialized control systems for each unit, thereby managing complexity through standardization.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS9008807B2Method of large scale process optimization and optimal planning based on real time dynamic simulation
Publication Date: 2015.04.14 STATISTICS & CONTROL
  • US9008807B2 patent drawing
  • US9008807B2 patent drawing
  • US9008807B2 patent drawing

AI summary

This invention provides a system and method of Advanced Process Control for optimal operation of multi-unit plants in large scale processing and power generation industries. The invention framework includes the following components: continuous real time dynamic process simulation, automatic coefficient adjustment of dynamic and static process models, automatic construction of transfer functions, determination of globally optimal operating point specific to current conditions, provision of additional optimal operating scenarios through a variety of unit combinations, and calculation of operational forecasts in accordance with planned production.