Overload risk state identifying method for power distribution network
An identification method and overload technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of poor accuracy and reliability of evaluation results, and achieve simplified simulation operation times, small calculation amount, and comprehensive results. Effect
Active Publication Date: 2012-10-24
CHINA ELECTRIC POWER RES INST +2
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In practical applications, the overload level is mainly evaluated from two aspects: the overload multiple and the allowable overload time, and the accuracy and reliability of the evaluation results are very poor.
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[0053] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0054] The present invention provides a distribution network overload risk state identification method, which uses the historical load information, t Real-time load measurement information at each moment and load forecast information within a certain period of time after time t (this period is determined by the user, generally 1min~30min), using the equivalent load method from the aspects of reality, continuity and predictability On the one hand, the overload index is calculated, and the severity level of the overload index is generated, and based on the severity level of the overload index, the overload index in the aspect of reality, continuity, and predictability is analyzed, and according to the configuration The step of judging the overload risk state of the power grid is to judge whether the power grid is in the ov...
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The invention discloses an overload risk state identifying method for a power distribution network. Overload indexes are computed by history load information within a certain period before a certain t point, load real-time measurement information at the t point and load prediction information within a certain period after the t point of the power distribution network in an equivalent load method from the aspects of reality, continuity and foreseeability, overload index severity grades are generated, the overload indexes in the aspects of reality, continuity and foreseeability are analyzed according to the overload index severity grades, whether the power distribution network is in an overload risk state at the t point is judged according to the overload risk state judging steps of the power distribution network, and dynamic and continuous overload risk state tracking and identifying of the power distribution network are carried out. The method is suitable for identifying and warning the overload risk state in the self-healing control process of the power distribution network.
Description
technical field [0001] The invention relates to the technical field of distribution network analysis and control, in particular to a method for identifying an overload risk state of a distribution network. Background technique [0002] In the distribution network self-healing control, the power supply capacity is an important indicator to measure the high-quality, efficient, economical and reliable operation of the distribution network, and whether the distribution network is overloaded is an important aspect to measure whether the power supply capacity is sufficient. With the rapid development of the local economy, the user's electricity load is also increasing, and the burden on the grid equipment is also increasing. The overload risk has become an important risk type faced by the distribution network. How to detect the overload risk early to avoid The serious overload operation of distribution network is an important research content in the evaluation of self-healing cont...
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IPC IPC(8): H02J3/00
Inventor 盛万兴宋晓辉张瑜仉天舒孟晓丽史常凯李雅洁胡丽娟贾东梨刘永梅
Owner CHINA ELECTRIC POWER RES INST