Distributed energy storage grid-connected synchronous control signal generation method and system
A technology of synchronous control signals and distributed energy storage, which is applied in the field of electric power, can solve problems such as difficult to realize, mutual coupling of frequency synchronization signals and phase synchronization signals, and achieve elimination of mutual coupling effects, elimination of voltage amplitude changes, and fast active synchronization Effect
Active Publication Date: 2020-09-18
GUANGXI POWER GRID ELECTRIC POWER RES INST
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Problems solved by technology
The active grid connection of distributed energy storage is to actively adjust the distributed energy storage voltage to quickly and effectively track the grid voltage through the control mechanism. The traditional adjustment method is to simultaneously adjust the error of the amplitude, phase angle and frequency of the distributed energy storage voltage. , but there is a phenomenon of mutual coupling in the generation process of frequency synchronization signal and phase synchronization signal
In addition, some scholars have proposed to directly control the distributed energy storage voltage to track the amplitude and phase of the grid voltage. The disadvantage is that this method needs to rely on high-speed communication to transmit time-domain signals such as phase and amplitude, which is often difficult in actual engineering due to distance limitations. accomplish
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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] figure 1 It is a schematic flowchart of a method for generating a distributed energy storage grid-connected synchronous control signal in an embodiment of the present invention, and the method includes the following steps:
[0046] S101. Obtain the first voltage vector of the distributed energy storage and the first voltage vector of the grid;
[0047] Specifically, the distributed energy storage system directly collects the first voltage vector of the dist...
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The invention discloses a distributed energy storage grid-connected synchronous control signal generation method and system. The method comprises the steps: acquiring a distributed energy storage first voltage vector and a power grid first voltage vector; based on a two-phase static alpha-beta coordinate system, carrying out the coordinate transformation on the distributed energy storage first voltage vector and the power grid first voltage vector, and obtaining a distributed energy storage second voltage vector and a power grid second voltage vector respectively; generating a frequency errorsignal and a voltage error signal based on the distributed energy storage first voltage vector, the power grid first voltage vector, the distributed energy storage second voltage vector and the powergrid second voltage vector; respectively adjusting the frequency error signal and the voltage error signal by using a PI controller, and correspondingly outputting a frequency synchronization controlsignal and a voltage synchronization control signal. According to the embodiment of the invention, the mutual coupling influence of the frequency synchronization signal and the phase synchronization signal in the generation process in the traditional method can be eliminated.
Description
technical field [0001] The invention relates to the field of electric power technology, in particular to a method and system for generating a distributed energy storage grid-connected synchronous control signal. Background technique [0002] With the continuous breakthrough of energy storage technology, the gradual reduction of cost and the evolution and development of the demand side, the widespread application of distributed energy storage in the power system is an inevitable trend in the development of the future power grid. The active grid connection of distributed energy storage is to actively adjust the distributed energy storage voltage to quickly and effectively track the grid voltage through the control mechanism. The traditional adjustment method is to simultaneously adjust the error of the amplitude, phase angle and frequency of the distributed energy storage voltage. , but there is a phenomenon of mutual coupling in the generation process of the frequency synchro...
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Login to View More IPC IPC(8): H02J3/28H02J3/46H02J3/40
CPCH02J3/28H02J3/46H02J3/40
Inventor 肖静吴宁冯玉斌韩帅鲍海波覃斌志
Owner GUANGXI POWER GRID ELECTRIC POWER RES INST