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Method for integrating offline mode data and state estimation data

A state estimation and data integration technology, applied in electrical digital data processing, special data processing applications, calculations, etc., can solve problems such as the inability to fully reflect the system network topology, and the inability to take into account the impact of dynamic parameters of the unit, to ensure integrity. , accurate dynamic characteristics, and the effect of improving calculation accuracy

Inactive Publication Date: 2014-09-17
CHINA SOUTHERN POWER GRID COMPANY +2
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Problems solved by technology

The state estimation system installed in the power dispatching center above the provincial level regards the low-voltage level network as the equivalent load, so the integrated state estimation data cannot fully reflect the network topology of the system, nor can it take into account the influence of unit dynamic parameters in the unmodeled network

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  • Method for integrating offline mode data and state estimation data

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Embodiment Construction

[0016] Attached below figure 1 , the method of the present invention is described in detail.

[0017] figure 1 Step 1 describes the establishment of the corresponding relationship between the AC nodes in the offline data and the physical bus in the state estimation.

[0018] figure 1 Step 2 in the above describes that according to the corresponding relationship and the physical bus shutdown status in the real-time state estimation results, the computing nodes in the offline mode data to be integrated are divided into mapped operating nodes, mapped out of service nodes and unmapped nodes. Wherein, the mapped operational node corresponds to at least one physical bus that is put into operation, the mapped out-of-service node corresponds to all physical buses that are out of service, and the unmapped node has no corresponding physical bus.

[0019] figure 1 Step 3 in the description is to generate power flow data according to the real-time state estimation results, and determi...

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Abstract

A method for integrating offline mode data and state estimation data belongs to the technical field of electric power systems and automation technology of the electric power systems, is suitable for integrating the offline mode data and the state estimation data in a way of model splicing and trend matching, and improves the accuracy of online security and stability analysis and calculation. The method comprises the following steps: the type of calculation nodes and that of branch circuits in the offline mode data are divided according to the corresponding relation between the offline mode data calculation nodes and a physical bus in state estimation, the corresponding relation between the state estimation data calculation nodes and the physical bus, and the physical bus stop state; and the connecting line in the offline mode data is cut off and topology analysis is carried out so as to obtain an isolated network only including unmodeled nodes. The active power of the connection line and the voltage precision of connection nodes are met through adjusting the active power and reactive power of the unmodeled nodes. A generator related to the unmodeled nodes and load dynamic parameters are added in a state estimation stable file so as to generate a whole-network stable file to be used in the security and stability analysis and calculation.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof, and is suitable for online safety and stability analysis and calculation of electric power systems. Background technique [0002] The modeling range of the state estimation system is an important factor affecting the calculation accuracy of the online security and stability analysis of the power system. The state estimation system installed in the power dispatching center above the provincial level regards the low-voltage level network as the equivalent load, so the integrated state estimation data cannot fully reflect the network topology of the system, nor can it take into account the influence of unit dynamic parameters in the unmodeled network . The off-line data used for mode calculation includes the power flow stability data of each voltage level in the whole network, and the corresponding relationship between the calculation nodes and the state estima...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 汪际峰鲍颜红李建设曾兴嘉黄河徐伟苏寅生徐泰山刘洪涛周海锋
Owner CHINA SOUTHERN POWER GRID COMPANY
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