Method for suppressing voltage fluctuation of power distribution network on basis of flexible multi-state switch
A voltage fluctuation and multi-state technology, applied in AC network voltage adjustment, circuit devices, AC network circuits, etc., can solve problems such as insufficient controllable capacity, low utilization rate of distributed power sources, and inability to suppress system voltage fluctuations, etc. The effect of large control capacity, ensuring normal power consumption and improving utilization rate
Active Publication Date: 2019-04-05
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
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Problems solved by technology
[0007] The existing technology has the problem of insufficient controllable capacity, unable to suppress the voltage fluctuation of the system in a wider range, and the utilization rate of distributed power is low
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[0041] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting 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.
[0042] Such as figure 1 As shown, the three terminals of the flexibl...
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The invention discloses a method for suppressing voltage fluctuation of a power distribution network on the basis of a flexible multi-state switch. The suppression method comprises the following steps: firstly, by virtue of multiport power mutual aid regulation of the flexible multi-state switch, controlling input output power of each port of the flexible multi-state switch, regulating flow distribution of a power grid connected with each port, and suppressing voltage fluctuation on a voltage of the power distribution network due to access of a distributed power supply; secondly, building a power distribution network operation model containing the distributed power supply and the flexible multi-state switch, and analyzing constraint conditions for operation of the flexible multi-state switch and the power distribution network; thirdly, taking minimum voltage fluctuation of the power distribution network as an optimization goal, and solving the power distribution network operation modelin the step 2 by utilizing an optimization algorithm, so that active power and reactive power instruction values of each port of the flexible multi-state switch are obtained; and fourthly, accordingto the instruction values in the step 3, regulating the flexible multi-state switch, so that the effect that voltage fluctuation caused on each node of the power distribution network due to the accessof the distributed power supply does not exceed an allowable value is realized.
Description
technical field [0001] The invention relates to the technical field of power electronic equipment control, in particular to a method for suppressing voltage fluctuations of distribution networks based on flexible multi-state switches. Background technique [0002] In the field of electric power development, new renewable energy power generation typified by photovoltaic power generation and wind power generation has gradually become one of the hotspots of research and development in the current electric power field. Up to now, my country has put into operation a number of large-capacity photovoltaic power plants and wind power plants. When large-scale renewable energy power generation is connected to the grid, it will inevitably affect the power flow distribution and flow direction of the grid. Moreover, the power generation output of renewable energy such as photovoltaic power generation and wind power generation is greatly affected by external conditions such as the surrou...
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IPC IPC(8): H02J3/12H02J3/16
CPCH02J3/12H02J3/16H02J2203/20Y02E40/30
Inventor 赵国鹏周昕炜刘思远杨勇王朝亮许烽丁超
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)