Page 29 - Distributed model predictive control for plant-wide systems

Introduction 3

y 1
Heater4 Thermal
u 1 Senser1 S 1

Thermal
y 2 transfer
Heater3 Thermal
u 2 Senser2 S 2

Thermal
y 3 transfer
Heater2 Thermal
u 3 Senser3 S 3

Thermal
y 4 transfer
Heater1 Senser4 S 4
u 4 Thermal

Figure 1.2 The multizone building temperature regulation system

Wind power Community
station

Thermal Thermal
power plant power plant

Industrial
Photovoltaic
consumers
Figure 1.3 Distributed power generation power network

1.2 Control System Structure of the Plant-Wide System
The control structure is a very general concept. It includes how to schedule the controllers, and
the inputs/outputs of each controller. The control system structure of the plant-wide system
is shown in Figure 1.4, which is a hierarchical structure. The top layer, denoted as layer 4, is
a steady economic optimization layer which is used to optimize the key process parameters,
e.g., the product quantity, product quality, feeding material quality, etc. Layer 3 is a real-time
optimization layer which dynamically optimizes the set-point of the multivariable layers.