A strategy setting method for high frequency cutting machine in power system
A high-frequency cutting machine and power system technology, applied in data processing applications, forecasting, instruments, etc., can solve the problems of lack of systematic configuration methods for high-frequency cutting machine strategy configuration, difficulty in adapting to specific situations, etc., to avoid disorderly jumps machine, improve the ability to resist serious faults, and achieve the effect of machine-network coordination
Active Publication Date: 2019-01-22
ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD +2
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Problems solved by technology
However, due to the lack of quantitative analysis technology, the current high-frequency cut-off strategy configuration lacks a systematic configuration method. Usually, the preliminary plan is determined by artificial trial and error methods, and then the strategy adaptability is checked through simulation, and local adjustments are made.
Obviously, this kind of adjustment is difficult to adapt to the requirements of specific situations
Method used
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[0023] The present invention will be described in further detail below with reference to the accompanying drawings.
[0024] figure 1 The specific steps of the method of the present invention are described, wherein the first step expresses the boundary conditions for formulating the high-frequency cut-off strategy of the power grid. The boundary conditions include the following three parts:
[0025] (1) The maximum output power P of the power grid max , the value is determined according to the grid operation plan;
[0026] (2) The candidate unit library and the ability to withstand frequency fluctuations of each unit in the candidate unit library. Assume that there are N candidate units in the candidate unit library, and the capacity of the i-th unit is P i , then the ability to withstand frequency fluctuations of each unit in the candidate unit library is represented by a binary table (f i ,t i ) means that f i is the frequency offset of unit i, t i The allowable durat...
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The present invention discloses an electric power system over frequency generator tripping strategy setting method, and belongs to the technical field of the electric power system and automation. Whether to increase over frequency generator tripping rounds is determined by utilizing and configuring a relationship between an over frequency generator tripping strategy unit total capacity and a system maximum delivery power, an over frequency generator tripping first-round frequency start set value is determined by utilizing the maximum power receivable by the system during normal operation, a preorder round over frequency generator tripping strategy is considered, a system delivery limit is solved to determine over frequency generator tripping configuration amounts of all rounds by utilizing transient frequency security constraints and steady frequency within-limit restraining conditions, and according to the principle that every power plant only selects one unit, units are selected according to unit frequency safety margins from large to small in an alternative unit base, thus for configuration of over frequency generator tripping strategies. With adoption of the method provided by the present invention, unit safety and system safety are both considered, thereby realizing machine-network coordination, avoiding unit disordered tripping, raising a severe failure withstanding capability of a power grid, and providing quantitative analyses and decisions for power system over frequency generator tripping optimal control.
Description
technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to a method for setting a high-frequency cut-off strategy of an electric power system. Background technique [0002] At present, with the development of ultra-high-voltage, ultra-high voltage AC-DC, and large-capacity transmission networks, during the transition to the target grid structure, the connection of the interconnected AC sections is still relatively weak. In extreme cases, after the AC section is disconnected, it will cause high-frequency problems in the network disconnection at the sending end. Therefore, the high-frequency cut-off of the grid is the last line of defense for frequency stability control under severe grid faults. [0003] According to the requirements of the State Grid Corporation of China's "Guidelines for the Safety and Stability of Electric Power Systems", the power system must reasonably arr...
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IPC IPC(8): G06Q10/04G06Q50/06
Inventor 赵维兴刘福锁黄伟林成吴琛王国松马覃峰陈锐李威周磊袁虎玲张红丽王玉吕亚洲
Owner ELECTRIC POWER SCHEDULING CONTROL CENT OF GUIZHOU POWER GRID CO LTD