The Automatic Voltage Control is significant technique of modern power grid operation,and it is one of important function of intelligent grid management,it plays an important role to ensure the security,high quality a...The Automatic Voltage Control is significant technique of modern power grid operation,and it is one of important function of intelligent grid management,it plays an important role to ensure the security,high quality and economical operation of power grid.This paper introduces the research and application of Automatic Voltage Control in Tongtai Pumped Storage Power Station.展开更多
In order to optimize the allocation of power resources, ensure the safe and stable operation of the power system, maintain the coordinated development of the power grid and grid-connected power plants, and minimize li...In order to optimize the allocation of power resources, ensure the safe and stable operation of the power system, maintain the coordinated development of the power grid and grid-connected power plants, and minimize line losses. The power dispatching institution shall issue the bus voltage curve to the grid-connected power plants on a quarterly basis, which shall be used as the basis for the assessment of reactive auxiliary services. In order to maintain the target voltage value issued by the power grid, the power plant adopts automatic voltage control device (AVC), and realizes the automation and intelligence of power plant voltage adjustment by adjusting and controlling the reactive power of the excitation system to respond to the target voltage value of the power grid system.展开更多
In order to coordinate automatic voltage control （AVC） systems of a large interconnected system, a multi-level multi-area hybrid automatic voltage control （MLMA-HAVC） system was constructed. This system began its ...In order to coordinate automatic voltage control （AVC） systems of a large interconnected system, a multi-level multi-area hybrid automatic voltage control （MLMA-HAVC） system was constructed. This system began its trial operation in the Northeast China Grid in January 2010, and for the first time in China and abroad it realized automatic close-loop control of multi-area and multi-level interconnected power grid and multi-objective self-approaching optimization in aspects of security, high quality and economic operation. This system has three breakthroughs in theory and engineering application： l） Established the MLMA-HAVC theory to solve multi-objective optimization of large-scale system; 2） proposed reactive power/voltage coordination control method to inhibit or further eliminate regional oscillations; 3） presented advanced state estimation algorithm to guarantee acquisition of high reliability data. This paper summarizes the basic principle of MLMA-HAVC, and reports engineering realization of MI ,MA-HAVC system in tha Northeast China Grid.展开更多
An improved automatic voltage coordination control strategy （AVCCS） based on ;automatic voltage control （AVC） and battery energy storage control （BESC） is proposed for photovoltaic grid-connected system （PVGS）...An improved automatic voltage coordination control strategy （AVCCS） based on ;automatic voltage control （AVC） and battery energy storage control （BESC） is proposed for photovoltaic grid-connected system （PVGS） to mitigate the voltage fluctuations caused by environmental disturbances. Only AVC is used when small environ- mental disturbances happen, while BESC is incorporated with AVC to restrain the voltage fluctuations when large disturbances happen. An adjustable parameter determining the allowed amplitudes of voltage fluctuations is introduced to realize the above switching process. A benchmark low voltage distribution system including ]？VGS is established by using the commercial software Dig SILENT. Simulation results show that the voltage under AVCCS satisfies the IEEE Standard 1547, and the installed battery capacity is also reduced. Meanwhile, the battery＇s service life is ex- tended by avoiding frequent charges/discharges in the control process.展开更多
文摘The Automatic Voltage Control is significant technique of modern power grid operation,and it is one of important function of intelligent grid management,it plays an important role to ensure the security,high quality and economical operation of power grid.This paper introduces the research and application of Automatic Voltage Control in Tongtai Pumped Storage Power Station.
文摘In order to optimize the allocation of power resources, ensure the safe and stable operation of the power system, maintain the coordinated development of the power grid and grid-connected power plants, and minimize line losses. The power dispatching institution shall issue the bus voltage curve to the grid-connected power plants on a quarterly basis, which shall be used as the basis for the assessment of reactive auxiliary services. In order to maintain the target voltage value issued by the power grid, the power plant adopts automatic voltage control device (AVC), and realizes the automation and intelligence of power plant voltage adjustment by adjusting and controlling the reactive power of the excitation system to respond to the target voltage value of the power grid system.
基金supported by the Science and Technology Project of Northeast China Grid Company(Grant No.2009ZB1048)the National Natural Science Foundation of China(Grant Nos.50907038,50977047)
文摘In order to coordinate automatic voltage control （AVC） systems of a large interconnected system, a multi-level multi-area hybrid automatic voltage control （MLMA-HAVC） system was constructed. This system began its trial operation in the Northeast China Grid in January 2010, and for the first time in China and abroad it realized automatic close-loop control of multi-area and multi-level interconnected power grid and multi-objective self-approaching optimization in aspects of security, high quality and economic operation. This system has three breakthroughs in theory and engineering application： l） Established the MLMA-HAVC theory to solve multi-objective optimization of large-scale system; 2） proposed reactive power/voltage coordination control method to inhibit or further eliminate regional oscillations; 3） presented advanced state estimation algorithm to guarantee acquisition of high reliability data. This paper summarizes the basic principle of MLMA-HAVC, and reports engineering realization of MI ,MA-HAVC system in tha Northeast China Grid.
基金Supported by National Basic Research Program of China ("973" Program,No. 2009CB219701 and No. 2010CB234608)Tianjin Municipal Science and Technology Development Program (No. 09JCZDJC25000)Specialized Research Fund for Doctor Discipline of Ministry of Education of China (No. 20090032110064)
文摘An improved automatic voltage coordination control strategy （AVCCS） based on ;automatic voltage control （AVC） and battery energy storage control （BESC） is proposed for photovoltaic grid-connected system （PVGS） to mitigate the voltage fluctuations caused by environmental disturbances. Only AVC is used when small environ- mental disturbances happen, while BESC is incorporated with AVC to restrain the voltage fluctuations when large disturbances happen. An adjustable parameter determining the allowed amplitudes of voltage fluctuations is introduced to realize the above switching process. A benchmark low voltage distribution system including ]？VGS is established by using the commercial software Dig SILENT. Simulation results show that the voltage under AVCCS satisfies the IEEE Standard 1547, and the installed battery capacity is also reduced. Meanwhile, the battery＇s service life is ex- tended by avoiding frequent charges/discharges in the control process.
