Method for prewarning safety of electric network operation fourth-order gradient

A technology for power grid operation and safety early warning, applied to electrical components, circuit devices, AC network circuits, etc., can solve the problems that the accuracy of the analysis results of safety early warning cannot be guaranteed, and changes in the external power grid cannot be reflected in the power grid model of the safety early warning system, etc. , to achieve the effect of ensuring the accuracy of

Inactive Publication Date: 2008-12-17
STATE GRID HENAN ELECTRIC POWER +1
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Problems solved by technology

However, the existing early warning system usually adopts an offline equivalent model for the adjacent external power grid. Once the equivalent model of the external network is established, it will remain unchanged for a

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  • Method for prewarning safety of electric network operation fourth-order gradient

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[0039] like figure 1 As shown, the detailed description of the implementation of the four-level gradient safety early warning method for power grid operation proposed by the present invention is as follows:

[0040] Step 1. Monitor and evaluate the current operation status of the power grid, obtain the current safety level and hidden dangers of the power grid operation, and give an alarm, such as figure 1 As shown in 1, it includes the following steps:

[0041] (1) The upper-level power grid dispatching center of the current-level power grid uses the state estimation results to perform online network equivalence, and compares the generated equivalent real-time grid model, the active and reactive power of generators, and the active and reactive power of grid loads. And the busbar voltage is sent to the power grid dispatching center at the same level; the specific method has been awarded a Chinese patent (Chinese patent: ZL 200510086549.8).

[0042] (2) The power grid dispatch...

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Abstract

The invention relates to an early warning method at four-grads of power network operation, and belongs to the automation field of electric power system management. The method includes the following steps: a safe, stable and comprehensive evaluation is carried out at four-grads according to time scales; the first level is to carry out security evaluation to the real time situation of the power network, and to identify the safety level of the power network operation; the second level is to carry out security collation to the power network forecast operation situation in the next 15 minutes (before the power network operation), and to send a security alarm; the third level is to carry out security collation to a power-generating plan and a servicing plan of the next day; and to send an alarm; the fourth level is to carry out security collation to a power-generating plan and a servicing plan of the next week. The early warning method ensures that the power network can run safely and stably through the safety early warning at four time scales, namely real time, pre-operation, previous-day planning and week planning.

Description

technical field [0001] The invention relates to a four-level gradient safety early warning method for power grid operation, which belongs to the field of power system scheduling automation. Background technique [0002] The early warning system is a safe and reliable operation guarantee technology for power grids that has developed rapidly internationally and domestically in recent years. Its core purpose is to evaluate the safety status of the power grid operation, and take corresponding control measures according to the evaluation results to prevent accidents and deterioration of the large power grid. possibility is minimized. The early warning systems that have been completed mainly realize the online early warning function, such as the OPS-102 online pre-decision system for prevention and control of Guangxi Power Grid (academic papers, Li Delan, Gao Wenjian, Guangxi Electric Power, 2004, (5): 66), Sichuan Power Grid Security and Stability Real-time early warning and con...

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Application Information

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IPC IPC(8): H02J3/00G06F17/00G06Q50/00G06Q50/06
CPCY04S10/50
Inventor 王红印吴文传张明亮张伯明付红军柴旭峥李大鹏王子琦孙含笑胡扬宇周鹏王景钢
Owner STATE GRID HENAN ELECTRIC POWER
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