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Fault fitting method in load modeling

A load modeling and fault technology, applied to electric vehicles, instruments, electrical digital data processing, etc., can solve problems that cannot reflect system characteristics

Inactive Publication Date: 2009-04-08
CHINA ELECTRIC POWER RES INST +1
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  • Claims
  • Application Information

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Problems solved by technology

As far as my country's current grid structure and operation level are concerned, the possibility of large-disturbance faults is very small, and the checking research of load models often takes small-disturbance accidents as the research object, but the load model obtained from this may not reflect the power of the system. Behavior when subjected to large disturbances

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  • Fault fitting method in load modeling
  • Fault fitting method in load modeling
  • Fault fitting method in load modeling

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Embodiment Construction

[0028] Attached below Figure 1-3 The application of fault fitting method modeling in Northwest Power Grid is described in detail.

[0029] 1. Establish the operation mode of the system in case of failure

[0030] In the practical application to the Northwest Power Grid, two operation modes of 950MW west-to-east power transmission and 800MW east-to-west power transmission are adopted;

[0031] 2. Determine the failure mode

[0032] 1) 950MW west-to-east power transmission, power system stabilizer switching, no fault jumping line;

[0033] 2) 800MW is transmitted from east to west, and the power system stabilizer is switched on, and there is no failure to jump the eyebrow line;

[0034] 3) 800MW power transmission from east to west, power system stabilizer, and two sets of Qiankang power plant units;

[0035] 4) 950MW west-to-east power transmission, power system stabilizer switch, one unit in Lijiaxia;

[0036] 3. Carry out simulation calculation

[0037] Using the exist...

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Abstract

The invention discloses a digital simulation of an electric power system which is deep in the fields like planning, designing, running and researching of the electric power system. The simulation result of the digital simulation becomes the main foundation for the decisions in the fields. A load is used as the important composition part of the electric power system; the model and the parameters of the load have important effects on the digital simulation result of the electric power system. Building an accurate load model is a universal difficulty due to the composition complexity of the load. The digital simulation carries out simulation analysis on a plurality of running modes and a plurality of failure modes of a northwest power network and carries out comparison analysis on the wave recording result of a plurality of failures based on a synthesized load model (SLM) which more reasonably considers the line of a distribution network in structure.

Description

technical field [0001] The invention relates to a simulation and calculation of a power system, in particular to a modeling method of a load model of the power system. Background technique [0002] There are three ways of load modeling: statistical synthesis method, overall measurement and identification method and load modeling method based on accident simulation. Fault fitting is a load model modeling method based on power system accident simulation. The "accident" here refers to both occasional power system accidents and artificial disturbance tests such as short circuits; load "modeling" based on accident simulation is usually not "from scratch" load modeling, but often through The accident simulation verifies the original load model, and if necessary, the load model parameters need to be adjusted according to the accident simulation results. [0003] A common situation in engineering practice is: when a power system starts to perform simulation calculations in the ear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J7/26G06F17/50
CPCY02E60/76Y04S40/22Y02E60/00
Inventor 汤涌丁永福张红斌史可琴邱丽萍范越王琦万筱钟杨文宇
Owner CHINA ELECTRIC POWER RES INST
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