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Status estimating and coordinating method of wide-area power system

A state estimation and power system technology, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as voltage and power mismatch, and achieve the effect of improving convergence performance and high estimation accuracy

Inactive Publication Date: 2013-07-10
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a wide-area power system state estimation coordination method to solve the problem of voltage and power mismatch between the state estimation of the transmission system and the state estimation of the distribution network at the boundary nodes

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Embodiment Construction

[0029] The technical scheme of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] In order to solve the coordination problem of wide-area power system state estimation, according to the attached figure 1 As shown in the flow chart, the steps are as follows:

[0031] (1) Regional decoupling of power system

[0032] A given regional transmission and distribution network aggregation system is decoupled into transmission network, boundary system, and distribution network by using a network decoupling method based on geographical distribution, as shown in the attached figure 2 shown. After decoupling, the transmission level is managed and controlled by the transmission energy management center, the distribution system level is managed and controlled by the power distribution management center, and the boundary level is used as a coordination system, and the voltage and power at the boundary nodes can be resolved by usi...

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Abstract

The invention relates to the field of control of a power system, and discloses a status estimating and coordinating method of a wide-area power system, aiming at solving the problem that the voltage and the power at the boundary nodes are not matched with each other during power transmission system status estimation and power distribution network status estimation. The status estimating and coordinating method of the wide-area power system mainly comprises the following steps of: 1. decoupling a power system region; 2. modeling a local area network; 3. measuring configuration and functions of a system; 4. estimating the status of an aggregation system; and 5. determining end conditions: if the aggregation system meets the end conditions, stopping the status estimation of the aggregation system and outputting results; and if the aggregation system does not meet the terminal conditions, returning to the step 4 till the aggregation system meets the end conditions. After the method is used, the problem that the voltage and the power are not matched with each other in the links of power transmission and power distribution in the prior art can be solved, the power grid status estimation is high in precision, and the real-time monitoring and controlling of the power transmission link and the power distribution link of the power system can be realized.

Description

Technical field [0001] The invention relates to the field of power system control, in particular to a method for state estimation and coordination of a wide-area power system. Background technique [0002] In recent years, smart grid technology has gradually become the focus of various countries. It aims to comprehensively upgrade and transform the traditional power system's power generation, transmission, distribution and power consumption. In the link of power generation, it focuses on the research of new energy power plant planning, site selection and equipment management; in the link of power transmission, it focuses on the research of power grid planning, renewable energy grid connection, operation scheduling, and wide-area control; in the link of distribution network, Focus on the research of advanced measurement system, communication technology, information security technology, micro-grid operation technology and advanced distribution automation; in the link of electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 张葛祥赵俊博王德林
Owner SOUTHWEST JIAOTONG UNIV
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