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Distributed transmission and distribution cooperative reactive power optimization method and system based on Thevenin equivalent parameter identification

A Thevenin equivalent and parameter identification technology, applied in the field of transmission and distribution networks, can solve the problems of unable to meet the real-time requirements of online reactive power optimization, the number of iterations is large, the total time of global optimization is long, etc., and achieve good calculation speed and few iterations , the effect of meeting real-time requirements

Active Publication Date: 2019-08-13
SHANDONG UNIV
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Problems solved by technology

[0002] In the traditional master-slave split model, the distribution network equivalent value is the PQ load in the transmission network. In the distribution network power flow calculation model, the transmission network equivalent model is used to calculate the voltage phasor value at the root node. When the load level increases to When the convergence limit is near, the number of iterations of the transmission and distribution coordinated power flow calculation based on the master-slave split method is as many as 10 to 20 times. The number of iterations is large, and the total time of global optimization is long, which cannot meet the real-time requirements of online reactive power optimization.

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  • Distributed transmission and distribution cooperative reactive power optimization method and system based on Thevenin equivalent parameter identification
  • Distributed transmission and distribution cooperative reactive power optimization method and system based on Thevenin equivalent parameter identification
  • Distributed transmission and distribution cooperative reactive power optimization method and system based on Thevenin equivalent parameter identification

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[0029] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

[0030] It should be noted that the terminology used herein is only for describing specific embodiments, and is not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0031] Implementation example one

[0032] This embodiment discloses a distributed transmission and distribution collaborative...

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Abstract

The invention provides a distributed transmission and distribution cooperative reactive power optimization method and system based on Thevenin equivalent parameter identification. A global optimization problem of a power transmission network and a power distribution network is decomposed into sub-problems that each master system and each slave system independently carry out reactive power optimization. For the power transmission network, each power distribution network connected with the power transmission network is simplified into a PQ load, each power distribution network only transmits a complex power value at a root node to the power transmission network, and the complex power is the sum of net load of the power distribution network and complex power loss of the power. For the distribution network, the power transmission network is equivalent to Thevenin equivalent potential and equivalent impedance. The relative independence of an original power transmission and distribution network system and data is maintained. The state of the whole power transmission network system is represented only through the two parameters of the equivalent potential and the equivalent impedance, theinformation transmitted to the distribution network is less, and the communication traffic is reduced.

Description

technical field [0001] The present disclosure relates to the technical field of transmission and distribution networks, in particular to a distributed transmission and distribution collaborative reactive power optimization method and system based on Thevenin equivalent parameter identification. Background technique [0002] In the traditional master-slave split model, the distribution network equivalent value is the PQ load in the transmission network. In the distribution network power flow calculation model, the transmission network equivalent model is used to calculate the voltage phasor value at the root node. When the load level increases to When the convergence limit is near, the number of iterations of the transmission and distribution coordinated power flow calculation based on the master-slave split method is as many as 10-20 times. The number of iterations is large, and the total time of global optimization is long, which cannot meet the real-time requirements of onl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J3/06
CPCH02J3/1821H02J3/06H02J2203/20Y02E40/30
Inventor 贠志皓孙毓婕
Owner SHANDONG UNIV
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