A method and device for monitoring the synchronization safety and stability of a new energy grid-connected system
A new energy and stable technology, applied in circuit devices, single-network parallel feeding arrangements, AC network circuits, etc., can solve the problem of not considering the influence of overvoltage, avoid the risk of off-grid or equipment insulation breakdown, guarantee The effect of synchronous safe and stable operation
Active Publication Date: 2022-02-11
CHINA ELECTRIC POWER RES INST
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[0006] In order to solve the technical problem that the impact of overvoltage is not considered in the prior art when evaluating the synchronization security and stability of the new energy grid-connected system, this application provides a method for monitoring the synchronization security and stability of the new energy grid-connected system, wherein, The new energy grid-connected system includes new energy power generation equipment and an AC power grid. The new energy power generation equipment is connected to the AC power grid based on the voltage source converter VSC, and realizes synchronous operation with the AC power grid through the phase-locked loop PLL in the VSC. The methods include:
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[0099] Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Apparently, the described embodiments are only some embodiments of the present invention, rather than all embodiments of the present invention, and it should be understood that the present invention is not limited by the exemplary embodiments described here.
[0100] It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
[0101] Those skilled in the art can understand that terms such as "first" and "second" in the embodiments of the present invention are only used to distinguish different steps, devices or modules, etc. necessary logical sequence.
[0102] It should also be understood that in the embodiments of the present invention, "plurality" may...
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The embodiment of the present invention discloses a method and system for monitoring the synchronization safety and stability of a new energy grid-connected system, as well as a storage medium and electronic equipment, wherein the method includes: calculating the real-time relative phase-locking angle according to the collected parameters, and Determine the synchronous operable range of the new energy grid-connected system, the safety boundary of the relative phase-locked angle of the new energy grid-connected system based on overvoltage constraints, and determine the synchronous operable range of the new energy grid-connected system and the security of the relative phase-locked angle The boundary determines the operable range of the relative phase-locked angle of the new energy grid-connected system based on overvoltage constraints, and finally by judging whether the real-time phase-locked angle exists within the operable range of the relative phase-locked angle of the new energy grid-connected system based on overvoltage constraints Judging the synchronization security and stability of the new energy grid-connected system within the scope. The method and system effectively avoid the safety problem of new energy power generation equipment caused by overvoltage, and fully guarantee the synchronous, safe and stable operation of the new energy grid-connected system.
Description
technical field [0001] The present invention relates to the field of electric power control, and more specifically, relates to a method and device for monitoring the synchronization safety and stability of a new energy grid-connected system, as well as a storage medium and electronic equipment. Background technique [0002] As the installed capacity of new energy such as wind power and photovoltaics in the power grid continues to increase, the proportion of new energy power generation in the total power generation of the power grid is also increasing, and new energy power will gradually become the main body of energy increment. [0003] Compared with the traditional synchronous power supply, the new energy power supply with the power electronic converter as the grid-connected interface has obvious characteristics of multi-time scale coupling, multi-control link interaction, nonlinear dynamics and low inertia. The synchronization stability problem of power system has attracte...
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IPC IPC(8): H02J3/40H02J3/00
CPCH02J3/381H02J3/40H02J3/00125H02J2203/20H02J2300/20
Inventor 孙华东王一鸣徐式蕴赵兵王姝彦毕经天
Owner CHINA ELECTRIC POWER RES INST