关键词：
Process control
Network topology
Petroleum
Security
Switches
Motor drives
Motor control
Intelligent control
摘要：
As technology continues to drive innovations, petroleum and chemical enterprises must continue to keep pace to remain competitive in an ever-changing marketplace. The technology trend is to replace systems of yesterday with higher-performance, low-cost, and optionrich networked ones that provide a shorter return on investment and offer more flexibility. With the evolution of control system technology, systems migrate toward functions that are increasingly distributed to smarter, more granular control system components capable of performing localized operations. Most of these functions were once the responsibility of a central or master controller. Systems that integrate intelligent devices, device-level networks, and reporting software into mediumvoltage (MV) and low-voltage (LV) motor control centers (MCCs) are a prime example of where this trend is increasingly implemented. Technology can deliver improved diagnostics, early warnings used to increase system reliability, design flexibility, simplified and reduced wiring, and additional levels of protection for personnel safety in all process industries via the utilization of intelligent networks. This article focuses on the next steps of technology integration, intelligent devices, and device-level information collection over a single network that provides the convergence of control and information to optimize plant- and enterprise-wide processes and energy management.
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