A method and device for analyzing voltage sensitivity in a wind power collection area
A technology of voltage sensitivity and wind power collection, applied in AC network voltage adjustment, flexible AC transmission system, reactive power compensation, etc.
Active Publication Date: 2017-11-10
NORTH CHINA ELECTRICAL POWER RES INST +2
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[0005] The main purpose of the embodiments of the present invention is to provide a method and device for analyzing voltage sensitivity in wind power collection areas, so as to overcome the defects existing in the existing voltage stability evaluation methods
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[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0045] Embodiments of the present invention provide a method and device for analyzing voltage sensitivity in wind power collection areas. The present invention will be described in detail below in conjunction with the accompanying drawings.
[0046] An embodiment of the present invention provides an analysis method for voltage sensitivity in wind power collection areas, such as figure 1 As shown, the analysis method mainly includes the following steps:
[0047] S...
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The invention provides an analysis method and device for the voltage sensitivity in a wind power convergence area. The analysis method includes the following steps: establishing a flow equation according to a reactive exchange relationship between a static synchronous compensator and a wind power convergence system; establishing a second flow equation according to the flow equation when all funs of a wind power convergence system operate at a constant power factor and outputted active power is constant; acquiring the first reactive voltage sensitivity, the first electrical susceptance voltage sensitivity, the second reactive voltage sensitivity, and the second electrical susceptance voltage sensitivity according to the second flow equation; generating a first relation and a second relation according to the first electrical susceptance voltage sensitivity and the second electrical susceptance voltage sensitivity; acquiring a first relationship between the reactive current I, the capacitance Bc, and the equivalent impedance X and the enlargement of voltage-reactive sensitivity according to the first relation; acquiring a second relationship between an admittance value BL, the capacitance Bc, and the equivalent impedance X and the enlargement of the voltage-reactive sensitivity according to the second relationship.
Description
technical field [0001] The present invention relates to wind farm reactive power voltage control technology, in particular to a method and device for analyzing voltage sensitivity in wind power collection areas. Background technique [0002] Due to the distribution characteristics of my country's wind energy resources, it is determined that the current method of large-scale centralized access of wind power and long-distance transmission of supply loads is adopted. With the continuous expansion of the installed capacity of wind turbines, the disadvantages brought by this method are becoming more and more obvious, that is, the short-circuit capacity of the centralized grid-connected transmission network structure is small, and local disturbances may also cause chain reactions in large areas. In recent years, there have been many wind turbine chain off-grid accidents in large-scale wind power concentrated areas. Some of the accidents are due to the fact that some wind turbines ...
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IPC IPC(8): H02J3/16
CPCY02E40/10Y02E40/30
Inventor 谢欢周红婷吴涛曹天植李善颖赵峰梁浩姚谦付宏伟史扬
Owner NORTH CHINA ELECTRICAL POWER RES INST