Stable emergency control method and system for new energy power system
A power system and emergency control technology, which is applied in photovoltaic power generation, electrical components, circuit devices, etc., can solve the problems of new energy power system stability and emergency control, and achieve good universality, reduced requirements, and improved speed.
Pending Publication Date: 2021-11-02
CHINA ELECTRIC POWER RES INST +2
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[0004] The present invention proposes a new energy power system security emergency control method and system to solve the problem of how to perform security emergency control on the new energy power system
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[0078] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.
[0079] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...
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The invention relates to a stable emergency control method and system for a new energy power system. The method comprises the following steps of: determining a power generation state, an operation point and a regulation potential of new energy; determining a serious fault set; for any serious fault in the serious fault set, performing super-real-time time domain simulation based on an initial stability control strategy, and acquiring an angular velocity and angular acceleration of a system state moving trajectory relative to a system inertia center; according to the angular velocity and the angular acceleration, judging whether the power angle transient stability of the power system is maintained after an initial stability control strategy is adopted under any serious fault; when the transient stability of the power angle is not maintained, calculating the minimum kinetic energy based on a regional energy function; generating an emergency control additional strategy corresponding to the any serious fault according to the minimum kinetic energy; and acquiring an emergency control additional scheme of the new energy station under any serious fault by combining a control mode of the power system containing the high-proportion new energy, the power generation state of the current new energy, the regulation potential and the emergency control additional strategy.
Description
technical field [0001] The invention relates to the technical field of stability control decision-making in the safety and stability control of large power grids in power systems, and more specifically, to a method and system for emergency control of stability in new energy power systems. Background technique [0002] As the proportion of renewable energy power generation, mainly wind power and photovoltaic power generation, in the power structure continues to increase, the randomness and intermittent nature of new energy power generation also poses a potential threat to the safe and reliable operation of the power grid. Although the development and interconnection of new energy power systems provide powerful power transmission capabilities and more flexible operation methods, they also cause many new dynamic problems. In order to enable the power grid to meet the needs of large-scale new energy power generation grid-connected, so as to better promote the optimization and ad...
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IPC IPC(8): H02J3/46H02J3/00H02J3/38
CPCH02J3/466H02J3/001H02J3/00125H02J3/381H02J2203/20H02J2203/10H02J2300/28H02J2300/24Y02E10/56
Inventor 刘敏孔祥玉张星徐得超常晓青龙呈张鹏牛琳琳卓谷颖孙丽香徐树文徐翌征彭红英彭丽李壮穆清王峰陈绪江乔小敏程昱田鹏飞王祥旭王跃郑伟杰
Owner CHINA ELECTRIC POWER RES INST