随着电站自动化过程控制理论和计算机技术的迅猛发展，对电站自动化过程控制系统的可靠性、复杂性、功能的完善性、系统的可维护性、人机界面的友好性、数据的可分析可管理性等各个方面都提出了愈来愈高的要求，系统之间的横向数据交换、系统与管理层和现场仪表级的数据交换日益增加，现场总线的应用越来越广泛，不同系统之间的准确、高速、大量的数据交换得以实现全集成、一体化的解决方案。
因此，传统的DEH系统已经不能满足现代电站自动化过程控制系统的设计标准和要求，HOLLiAS-MACS控制系统就是在这种形势下开发的新一代过程控制系统，它是一个全集成的、结构完整、功能完善、面向整个电站生产过程的过程控制系统。HOLLiAS-MACS是和利时公司结合1先进的计算机软、硬件技术，面向电站过程控制应用场合的先进过程控制系统。
HOLLiAS DEH控制系统基于HOLLiAS-MACS控制系统平台，集成BTC （Basic Turbine Control） 及 ATC （Automatic Turbine Control）系统，以汽轮机转速、负荷等为反馈信号，利用计算机闭环控制系统的原理控制机组的高、中压调节阀的开度，从而控制流入机组高、中压汽缸的蒸汽流量，进而控制汽轮机转速和负荷，实现汽轮机的启动、升速、定速、并网、带负荷、协调控制等过程，1终达到汽轮机运行操作的全过程自动控制。和利时公司联合华北电力大学专门开发出汽轮机热应力计算监测系统，用于机组的寿命计算及安全保护控制功能，是大型汽轮机自动运行不可缺少的系统。
With the rapid development of power station automation process control theory and computer technology, higher and higher requirements are put forward for the reliability, complexity, functional perfection, maintainability, friendliness of man-machine interface, analyzability and manageability of data of power station automation process control system. The horizontal data exchange between systems, data exchange between system and management and field instrument level are increasing day by day, Fieldbus is more and more widely used. The accurate, high-speed and large amount of data exchange between different systems can achieve a fully integrated and integrated solution.
Therefore, the traditional DEH system can not meet the design standards and requirements of modern power station automatic process control system. HOLLIAS Macs control system is a new generation of process control system developed under this situation. It is a fully integrated process control system with complete structure, perfect function and facing the whole power station production process. HOLLIAS Macs is an advanced process control system for power plant process control applications combined with the most advanced computer software and hardware technology.
HOLLIAS DEH control system is based on HOLLIAS Macs control system platform, integrates BTC (basic turbine control) and ATC (automatic turbine control) systems, takes turbine speed and load as feedback signals, and uses the principle of computer closed-loop control system to control the opening of high and medium pressure regulating valves of the unit, so as to control the steam flow into the high and medium pressure cylinders of the unit, and then control the turbine speed and load, Realize the process of steam turbine startup, speed increase, constant speed, grid connection, load and coordinated control, and finally achieve the whole process automatic control of steam turbine operation. Hollysys company and North China Electric Power University have specially developed the thermal stress calculation and monitoring system of steam turbine, which is used for the life calculation and safety protection control function of the unit. It is an indispensable system for the automatic operation of large steam turbine.