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EEAC (extended equal area criterion)-based transient stability critical power transmission section identification method

A transmission section, transient stability technology, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as the inability to realize automatic discovery of weak transmission sections, and achieve the effect of ensuring correctness

Active Publication Date: 2017-04-26
NARI TECH CO LTD +2
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Problems solved by technology

[0005] The patent "Identification Method for Transient Stability Key Transmission Sections of Power System Faults" (ZL200710135089.2) proposes a method to determine the transient stability of the power system based on the grid operating status, model and parameters, expected fault scenarios, and candidate sets of transmission sections. The key transmission section identification method corresponding to the fault, this method relies on manually specifying the set of candidate transmission sections, and cannot realize the automatic discovery of weak transmission sections

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  • EEAC (extended equal area criterion)-based transient stability critical power transmission section identification method
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  • EEAC (extended equal area criterion)-based transient stability critical power transmission section identification method

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Embodiment Construction

[0044] The present invention will be further described in detail below in conjunction with the embodiments and with reference to the accompanying drawings.

[0045] An embodiment of the present invention, its steps are as figure 1 Shown:

[0046] figure 1 Step 1 in the above describes the generation of power flow and stability files based on the model parameters of the power grid and the current operating state. According to the quantitative analysis theory of the Extended Equal Area Criterion (EEAC), the expected fault set F 1 Carry out transient stability assessment and go to step 2;

[0047] The quantitative analysis theory of the Extended Equal Area Criterion (EEAC) is common knowledge in this field. For details, please refer to "The Quantitative Theory of Motion Stability: Stability Analysis of Non-Autonomous Non-linear Multi-rigid Body Systems" (by Xue Yusheng, Jiangsu Science and Technology Press, 1999.12 Version).

[0048] figure 1 In step 2, the F 1 Carry out fa...

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Abstract

The invention discloses an EEAC (extended equal area criterion)-based transient stability critical power transmission section identification method and belongs to the power system and power system automation technical field. According to the method, fault screening is performed on a predicted fault set based on EEAC quantitative evaluation results; candidate section composition branches are screened through using the power fluctuation amplitude of each line in the dynamic process of transient stability simulation; the breaking of the candidate section composition branches is simulated, a node where a dominant complementation group set is located is adopted as a root node, all nodes connected with the root node are traversed, and the subordinate groups of the nodes are marked; nodes in the head nodes and tail nodes of candidate branches, which belong to an S group and an A group respectively, are adopted as starting points and terminal points, all communicated paths connected with the starting points and terminal points are obtained through topological searching; and branches with large power fluctuation amplitude are preferentially selected from candidate branches belonging to the communicated paths so as to form a cut set section. With the method of the invention adopted, requirements for online safety monitoring on a transient stability critical power transmission section under a predicted fault situation are satisfied with the current operating condition of a power grid satisfied.

Description

technical field [0001] The invention belongs to the technical field of power system automation, and in particular the invention relates to an EEAC-based identification method for key transmission sections of transient stability. Background technique [0002] The transmission section refers to a group of transmission components (lines, transformers) that are related to each other in terms of grid security and stability or power exchange. From the perspective of power transmission, the active power transmitted by each transmission element in the section should be in the same direction; from the perspective of power exchange, a set of transmission lines connecting two areas constitutes a transmission section for energy exchange. As the channel of power transmission and the corridor of electrical connection, the transmission section embodies the weak link in the power grid, and its monitoring is of great significance in the operation and control of the power system. [0003] At...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J3/001H02J2203/20
Inventor 鲍颜红苏寅生张金龙黄河任先成周剑刘韶峰李鹏彭慧敏姚海成向小蓉
Owner NARI TECH CO LTD
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