Hybrid Power Control System and Its Application

Hu, Wei; Qian-tu, Ruan; Wang, Wei; Mei, Shengwei; Lu, Qiang

doi:10.1109/icpst.2006.321787

Cited by 13 publications

(4 citation statements)

References 11 publications

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“…An innovative approach has to be developed to solve this problem. The electric hybrid control theory (EHCT) [6] , proposed independently by Chinese researchers, is such a new approach. The AEMS, which is proposed and implemented based on the EHCT, can achieve near-global-optimal control of power systems, thus the above-mentioned multi-objective optimization problem on the operation of large scale power systems can be solved to a near-optimal point in practice.…”

Section: The Aems For Near-optimal Operation Of Power Systemsmentioning

confidence: 99%

Modern power systems control centers: from EMS to AEMS

Sun

Qian-tu

et al. 2008

Sci. China Ser. E-Technol. Sci.

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Traditional energy management system (EMS) plays an indispensable role in control centers of electric power systems. However, it also has several shortcomings, including lack of real-time closed-loop control, unreliable functional modules, and difficult to exchange data. The electric hybrid control theory (EHCT) has been proposed as an innovative and effective means to overcome these shortcomings. This paper argues that the EHCT provides a theoretical foundation for the advanced energy management system (AEMS) that can achieve multi-objective, near-optimal, and closed-loop control of electric power grids. This paper also discusses the significance for control centers to evolve from the traditional EMS to the AEMS. Furthermore, this paper points out that the traditional EMS can be considered as an integral part of the AEMS and that the AEMS can be built upon the traditional EMS. Thus, the resources that are currently available can be fully utilized to achieve near-optimal and closed-loop control of power system operations.hybrid control, multi-objective near-optimal control, advanced energy management system, event driven A modern power system is generally composed of hundreds of thousands of components and may cover a vast geographical region and have very complex control strucutre. In practical operation, a power system is also subject to many disturbances that cannot be accurately forecasted. Consequently, it is a very difficult and arduous task to control and manage a modern power system so that it can reliably and securely provide high quality yet economic power supply. The energy management system (EMS) [1] is a key element in power system control centers. Mainstream EMS's currently in operation in power system control centers were developed in the 1990s, when computer technologies and power system control theories were rather limited. The main aim of the EMS is to help dispatchers monitor and analyze the operation states of electric power grids, while the adjustment and control of grid operation modes rely heavily on dispatchers' experiences. The status quo is far from the desired closedloop control.With the rapid expansion of modern power systems as a result of growing economy comes the increase in scale and complexity. It is becoming evident that it would be impractical for power system operations to satisfy multiobjectives such as security, high quality and economy by means of dispatchers' manual adjustment and control only. The advanced energy management system [2,3] (AEMS) was proposed and developed independently by power system researchers in China. The AEMS can coordinate all controllable resources in power grids in order to achieve multi-objective, near-optimal, and closedloop control of power grid operation.Several blackouts [4,5] in recent years have indicated that the development of power system control theory and technology especially the automation level in power

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Section: The Aems For Near-optimal Operation Of Power Systemsmentioning

confidence: 99%

Modern power systems control centers: from EMS to AEMS

Sun

Qian-tu

et al. 2008

Sci. China Ser. E-Technol. Sci.

Self Cite

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“…In light of the definition [2], hybrid control is the process of event detection and event elimination, so the event definitions are essential.…”

Section: Hagc Modelmentioning

confidence: 99%

“…Based on our country's original general theory of hybrid control system [2], all unacceptable and unsatisfactory states are classified and defined as events. Once some event occurs, appropriate control strategies are given out and performed, to 1 Supported by National Natural Science Foundation Project (50907034) Supported by the Fundamental Research Funds for the Central Universities(10MG08) make the system back to the non-event state.…”

Section: Introductionmentioning

confidence: 99%

The Research on Hybrid Automatic Generation Control (HAGC)

Sun

Xiao

et al. 2012

2012 Asia-Pacific Power and Energy Engineering Conference

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1 -The hybrid control theory is introduced to the active power/frequency control of the power system in this paper, and the hybrid automatic generation control (HAGC) is proposed with the architecture, control strategy and application method. Furthermore, in view of the weakness of the current real power control theory and technology, two modes, i.e., the real-time and look-ahead control mode are adopted in HAGC. With the establishment of the event-driven mechanism, HAGC integrates control system combining the real-time control mode and the look-ahead control mode, and it can improve real power security, economical and quality efficientily.

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“…Firstly, it is the first time of realizing system-wide automatic closed-loop control in power systems. Scientists and engineers in power systems have a dream for a long time for pursuing multi-objective optimization of stability, quality and economy of power systems, and the AEMS leads to fulfillment of the dream [5][6][7] . Secondly, benefited from the rapid development of computer science and communication technologies, the AEMS has brought forth new ideas in the software architecture.…”

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confidence: 99%

Advanced EMS and its trial operation in Shanghai power system

Mei

et al. 2008

Sci. China Ser. E-Technol. Sci.

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To meet the demand of high stability, high quality, and low losses of power systems, the advanced energy management system (AEMS) is established and revealed in this bulletin, which has been put into trial operation in Shanghai power system for almost half a year. The AEMS is novel from all aspects covering idea, theory, method, software, and engineering. The essence of AEMS is exercising the hybrid automatic control theory and technology to realize multi-objective optimal closedloop control of power systems. Based on an "event-driven" strategy, the AEMS transforms multi-objective optimal control problems into event identification and elimination by defining the unsatisfactory states of a power system as events. This bulletin concisely presents the theory and main advantages of AEMS, as well as its implementation in Shanghai power system. hybrid automatic control, multi-objective optimization, AEMS, event drivenModern power systems are complex giant ones which spread thousands upon thousands of square miles. Its control and dispatch mainly, up to now, depend on experiences of operators and the corresponding conventional EMS (energy management system) developed in the 1990s [1][2][3] . Restricted by computer technologies and power system control theory at those days, the main function of EMSs was to provide dispatchers with the operating data and information of power systems. Some EMSs might more or less offer advices to dispatchers; however, none of them was in the sense of closed-loop automatic control. The fulfillment of multi-objective optimal control was really the postponed expectation of both the theorists and engineers who dealt with power systems. We have been engaging in the AEMS (advanced energy management system) for eight years and now we have already completed the most important part of this task. The theoretical and relevant software systems have been formed, which are working for the Shanghai power sys-

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Hybrid Power Control System and Its Application

Cited by 13 publications

References 11 publications

Modern power systems control centers: from EMS to AEMS

Modern power systems control centers: from EMS to AEMS

The Research on Hybrid Automatic Generation Control (HAGC)

Advanced EMS and its trial operation in Shanghai power system

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