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Generator tripping control method used in dynamic tracking transient state power angle weak stable mode

A transient power angle and dynamic tracking technology, which is applied to the layout of AC network circuits, electrical components, and emergency treatment AC circuits, can solve problems such as algorithms for automatic sorting of switchable units, and reduce emergency control search efficiency. Achieve the effects of improving emergency control efficiency, improving effectiveness and automation level, and simplifying search range

Active Publication Date: 2018-02-23
NANJING NARI GROUP CORP +4
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Problems solved by technology

However, none of the above methods mentioned the algorithm for dynamically realizing the automatic sorting of switchable units, and the independent identification and control of different transient power angle stabilization modes and the corresponding sensitivity sorting of generator sets reduces the search efficiency of emergency control

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  • Generator tripping control method used in dynamic tracking transient state power angle weak stable mode
  • Generator tripping control method used in dynamic tracking transient state power angle weak stable mode
  • Generator tripping control method used in dynamic tracking transient state power angle weak stable mode

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Embodiment Construction

[0031] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0032] figure 1 Step 1 in the description is to measure the electrical quantity of the local grid in real time from the online decision-making system platform, and determine the transient power angle weak stability mode of the system within a given time window from the occurrence of the fault to the end of the actual measurement.

[0033] Specifically, the determination of the transient power angle stabilization mode is based on the unit coherence identification. According to the coherence identification of the unit, the complementary group division mode of the system is determined. Assuming that all generators in the system are divided into M coherent groups, then there are 2 coherent groups in total. M - 1 system complementary group division mode, for any mode Z in all system complementary group division modes k , it should satisfy the followin...

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Abstract

The invention discloses a generator tripping control method used in a dynamic tracking transient state power angle weak stable mode, and belongs to the technical fields of an electric power system andautomation thereof. By solving the phenomenon that complex transient state power angle instability is caused by relative movement of multiple generator groups with poor coherence in a power grid development process, margin convert coefficients of different weak stable modes except a leading instable mode are taken into consideration; and a dynamic sensitivity index is established, and a generatortripping strategy in iteration in each step and a heuristic type emergency control strategy searching algorithm are formulated, so that automatic coordination control capable of entirely coordinatingmultiple weak stable modes of the system is realized. By virtue of the method, the operation principle in the complex system can be mastered by an electric power system dispatching operation staff, and basis is provided for formulating a generator tripping optimization strategy, thereby improving effectiveness and automatic level of large power grid safety and stability 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 machine cut-off control method for dynamic tracking of transient power angle weak stability mode. Background technique [0002] As the construction progress of the supporting power supply of the sending-end power grid lags behind, the strength of the receiving-end DC multi-infeed system gradually weakens. Many complex transient instability phenomena have emerged, such as multi-group characteristics of generator power angle trajectories, evolution of dominant instability modes, negative effects of stability control, and so on. This is due to the fact that in a multi-machine system, each generator is disturbed to a different degree after a fault, and relative motion occurs among multiple clusters with poor coherence in the system, and their relative motion changes dynamically over time. Therefore, in addition to payin...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J3/001H02J2203/20
Inventor 崔晓丹张红丽李威李碧君方勇杰项丽徐遐龄李勇刘福锁侯玉强李兆伟
Owner NANJING NARI GROUP CORP
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