Safe and stable online comprehensive defense method for electric power system
A power system, safe and stable technology, applied in the field of power system safety and stability control, can solve the problems of inexhaustible power system faults, difficulty in ensuring safety and stability, and loss of safety and stability of the power system.
Active Publication Date: 2016-11-09
NARI TECH CO LTD +4
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[0003] To ensure the safe and stable operation of the power system is to be able to deal with various faults (or disturbances) that the power system may suffer. Safety and stability analysis can only analyze a small number of expected failures, so there must be some other unexpected failures that will cause the power system to lose safety and stability
In addition, because the online security and stability analysis always needs a certain amount of computing time, and the power system may have changed during this period, even if the online security and stability analysis based on the future operatio
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[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0039] An online comprehensive defense method for power system safety and stability in this embodiment, including power system quasi-steady-state operating state identification, power system quasi-steady-state operation section data generation, safety and stability preventive control online decision-making calculation, safety and stability emergency control online pre-decision Calculation, security and stability emergency control real-time decision calculation and control decision selection, among which:
[0040] The quasi-steady-state operating state identification of the power system means that if the fluctuation range of each bus frequency in the power system is less than the set value Δf (usually set to 0.02Hz) within the set time length Δt (usually set to 10s), then the The current operating state is identified as the power system is in t...
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The invention discloses a safe and stable online comprehensive defense method for an electric power system, and belongs to the safe and stable control technical field of the electric power system. When the electric power system is in a quasi-steady-state operational state, a safe and stable prevention control online strategic decision specific to a preconceiving fault set, a safe and stable emergency control online pre-strategic decision specific to each preconceiving fault, and a safe and stable emergency control real-time strategic decision specific to the actual operational state of the electric power system are calculated separately; whether the duration between the operational moment and the current moment of the electric power system under the three kinds of control strategic decisions exceeds a corresponding constant value or not is taken as the effective criterion for each type of the control strategic decision; a to-be-executed control measure is determined by combination with the control strategic decision selection principle that the safe and stable emergency control real-time strategic decision is adopted firstly, the safe and stable emergency control online pre-strategic decision is adopted secondly, and the safe and stable prevention control online strategic decision is adopted finally in sequence; and therefore, a practical and effective method is supplied to the safe and stable online comprehensive defense of the electric power system.
Description
technical field [0001] The invention belongs to the technical field of power system safety and stability control. More precisely, the invention relates to a method suitable for comprehensively applying multiple control means of on-line preventive control, on-line emergency control and real-time emergency control to prevent power system from losing safety and stability. Background technique [0002] At present, the comprehensive defense measures for power system security and stability are mainly based on the guidelines for power system security and stability through offline analysis and calculation to plan the operation mode, and the online security and stability analysis technology based on the actual operation section data of the power system is used to support the safe and stable operation of the power system. . With the large-scale access of intermittent new energy power generation, the gradual advancement of the power market and the implementation of the future energy In...
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CPCH02J3/00H02J3/001
Inventor 徐泰山任先成罗建裕王亮冯长有李海峰曹路金一丁刘韶峰郑亮周海锋
Owner NARI TECH CO LTD
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