Reactive power optimization method for dynamic wattless equipment of wind power system of power grid
A power optimization, electrical system technology, applied in reactive power compensation, wind power generation, electrical components, etc.
Active Publication Date: 2017-12-15
TSINGHUA UNIV +2
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Problems solved by technology
Based on the background of existing technologies, solve the online optimization problem of dynamic reactive power reserve for large-scale wind power systems, so as to ensure that the power grid can still maintain stable operation after disturbances occur, and significantly improve the reliability of power consumption
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Embodiment Construction
[0070] The method for optimizing reactive power of dynamic reactive equipment suitable for wind power systems in power grids proposed by the present invention comprises the following steps:
[0071] (1) Calculate the reactive power adjustment range of all wind turbines in each wind farm of the wind power system in the grid and the reactive power of all dynamic reactive devices (such as static reactive power compensators, static reactive power generators, etc.) The adjustment range, the process is as follows:
[0072] Establish and calculate the upper limit of reactive power regulation of all wind turbines in the kth wind farm on the wind power system side of the power grid The lower limit of reactive power regulation of all wind turbines ΔQ G,k , The upper limit value of reactive power regulation of all dynamic reactive devices The lower limit value of reactive power regulation of all dynamic reactive devices ΔQ D,k The objective function of is as follows:
[0073] ...
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The invention relates to a reactive power optimization method for dynamic wattless equipment of a wind power system of a power grid, and belongs to the technical field of power system safety and control. The method includes the steps of calculating the wattless adjusting scope of all wind turbine generator systems and the reactive power adjusting scope of all dynamic wattless equipment in each wind power plant, calculating the result and sending to a wind power pooling station, the wind power pooling station generating N simulation scenes based on the operation states of each wind power plant, calculating the safety margin under the N simulation scenes, fitting the relation between the wattless value adjusting amount of the dynamic wattless equipment and the safety margin of a wind power plant pooling area according to the safety margin of the wind power plant pooling area corresponding to each scene, and finally, calculating the optimal wattless set value of each dynamic wattless equipment under the current state based on the relation between the wattless value adjusting amount of the dynamic wattless equipment and the safety margin of the wind power plant pooling area. The dynamic wattless reservation optimization method can effectively increase the safety margin of a wind power pooling area.
Description
technical field [0001] The invention relates to a reactive power optimization method for dynamic reactive equipment suitable for a wind power system in a power grid, and belongs to the technical field of power system safety and control. Background technique [0002] Tens of millions of kilowatts of large-scale wind power in the Zhangbei area of my country is fed into the weak sending-end power system, with strong random fluctuations in output and very complex operating characteristics. However, the dynamic reactive power reserve in some wind power collection areas is insufficient, so the voltage safety problem is prominent, especially under severe fault conditions. The dynamic reactive power reserve can provide fast reactive power voltage support after a disturbance in the power grid to ensure the safety of the power grid. It can be seen that how to optimize the dynamic reactive power reserve of large-scale wind power system online and ensure the safe operation of the pow...
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Login to View More IPC IPC(8): H02J3/16H02J3/50H02J3/38
CPCH02J3/16H02J3/386H02J3/50H02J2203/20Y02E10/76Y02E40/30
Inventor 孙宏斌刘海涛郭庆来杜延菱王彬于德明牛涛徐忱张伯明吴文传蒋芒
Owner TSINGHUA UNIV