An automatic voltage control method for 110 kV wind farm based on real-time online equivalence
A technology of automatic voltage and control method, applied in wind power generation, electrical components, circuit devices, etc., can solve the problems of wind farms that cannot be connected to the grid at 110kV, and automatic voltage control of 110kV wind farms cannot be realized.
Active Publication Date: 2017-08-25
STATE GRID CORP OF CHINA +2
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Problems solved by technology
However, due to the contradiction between the division of dispatching jurisdiction and the grid-connected voltage level, the 110kV grid-connected wind farm cannot be included in the calculation of the provincial regulation AVC, resulting in the inability to realize the automatic voltage control of the 110kV wind farm
Judging from the published literature so far, there is no better way to solve this problem
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[0039] The automatic voltage control method of the 110 kV wind farm based on the real-time online equivalent proposed by the present invention pre-sets the automatic voltage control cycle, and when the control cycle comes, the following steps are performed:
[0040] (1) In the automatic voltage control system of the regional power grid dispatching control center, all 110kV wind farms connected to the regional power grid are recorded as the 110kV wind farm set W 110 ={W i 110 ,i=1...n}, the 110kV bus on the high-voltage side of the 110kV wind farm is denoted as the bus set of the wind farm where n is the number of 110kV wind farms, and for the set of wind farms W 110 For each 110kV wind farm in , perform the following steps in turn:
[0041] (1-1) Obtain the complete grid model of the regional grid and the current opening and closing status of all circuit breakers and knife switches from the energy management system (EMS) of the regional grid;
[0042] (1-2) From the compl...
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The invention relates to an automatic voltage control method of a 110 kV wind farm based on real-time online equivalents, and belongs to the technical field of automatic voltage control of electric power systems. In this method, the automatic voltage control system of the regional power grid dispatching control center (ground dispatching) determines online the 110kV bus in the upper 220kV substation connected to the high-voltage side bus of the 110kV wind farm according to the operating status of the regional 110kV power grid, and through the static power network etc. Calculate the equivalent resistance and equivalent reactance between the two busbars, and the calculation results are sent to the provincial power grid dispatching center (provincial dispatching center) in real time; the provincial dispatching automatic voltage control system automatically establishes the high voltage of the 110kV wind farm according to the data sent from the local dispatching The grid-connected equivalent line between the side busbar and the 110kV busbar in the upper-level 220kV substation connected to it, so that the automatic voltage control command of the 110kV wind farm can be calculated.
Description
technical field [0001] The invention relates to an automatic voltage control method of a 110 kV wind farm based on real-time online equivalents, and belongs to the technical field of automatic voltage control of electric power systems. Background technique [0002] In recent years, affected by global climate warming and the energy crisis, the importance of clean energy has become increasingly prominent. Among them, wind power has attracted widespread attention from all over the world due to its huge development potential and relatively mature development technology. developed rapidly. By the end of 2014, the installed capacity of wind power in my country has exceeded 100 million kilowatts. [0003] At present, my country adopts a large-scale centralized development model for wind power resources. Due to the inherent intermittent characteristics of wind power generation, large-scale wind power grid integration has brought great challenges to grid operation and scheduling. A...
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IPC IPC(8): H02J3/38H02J13/00H02J3/00
CPCH02J3/386H02J3/00H02J2203/20H02J13/00007Y04S10/123Y04S10/16Y02E10/76Y02E40/70Y02E60/00Y04S40/121
Inventor 程伦贾京华汤磊曹树江王鹏高泽明郭庆来王瑞欣王彬瞿万生王生彬
Owner STATE GRID CORP OF CHINA