Symmetrical obtaining method for nodal voltage sensitivity in alternating-direct current parallel-serial power grid

A technology of AC-DC hybrid connection and node voltage, which is applied in the field of electric power engineering, and can solve the problems of not being able to reflect the instigation of active power and reactive power of the DC feed-in system, and not being able to reflect the balance of generators, etc.

Inactive Publication Date: 2012-04-04
SHENZHEN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a symmetrical acquisition method for the node voltage sensitivity in the AC-DC hybrid power network, aiming to solve the problem that the existing method for obtaining the node voltage sensitivity in the AC-DC hybrid pow

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  • Symmetrical obtaining method for nodal voltage sensitivity in alternating-direct current parallel-serial power grid
  • Symmetrical obtaining method for nodal voltage sensitivity in alternating-direct current parallel-serial power grid
  • Symmetrical obtaining method for nodal voltage sensitivity in alternating-direct current parallel-serial power grid

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[0014] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0015] An embodiment of the present invention provides a symmetrical acquisition method for node voltage sensitivity in an AC / DC hybrid power network, and the symmetrical acquisition method for node voltage sensitivity in an AC / DC hybrid power network includes the following steps:

[0016] According to the known power flow solution of the AC-DC hybrid power grid, the independent vectors of the AC-DC hybrid power grid are obtained;

[0017] Obtain the node voltage vector according to the relationship equation between the node voltage vector and the independent vector;

[0018] Obtain the node injec...

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Abstract

The invention belongs to the field of power engineering and provides a symmetrical obtaining method for nodal voltage sensitivity in an alternating-direct current parallel-serial power grid. In the symmetrical obtaining method, on the premise of obtaining an independent vector, a nodal voltage vector and a nodal charging power vector of the alternating-direct current parallel-serial power grid, aunified partial derivative formula is built for obtaining the voltage sensitivity of each node according to a relationship equation of the independent vector and the nodal voltage vector, and a function relationship expression of the nodal charging power vector with respect to the independent vector and the nodal voltage vector, so that the symmetrical obtaining for the voltage sensitivity of allnodes in the alternating-direct current parallel-serial power grid is achieved, thus the symmetrical obtaining method reflects an instigating action of a direct-current feed-in system to active powerand instigated performance to inactive power, and also reflects a purpose that the work of a balancing generator in the alternating-direct current parallel-serial power grid satisfies an objective law of a circuital law.

Description

technical field [0001] The invention belongs to the field of electric power engineering, in particular to a symmetrical acquisition method for node voltage sensitivity in an AC / DC hybrid power network. Background technique [0002] At present, the AC / DC hybrid power grid needs to obtain the node voltage sensitivity in advance in order to realize reactive power planning, node voltage regulation and optimal power flow solution. [0003] The acquisition of the existing node voltage sensitivity is based on the correction equations for solving the node power balance equations of the AC-DC hybrid power network. Since the correction equations do not include the power balance equations of the nodes connected to the balance generator, so Make the sensitivity of the voltage of the node connected to the balance generator to the node injection power of all generators, DC feed-in systems and loads and the sensitivity of the voltage of other nodes to the node injection power of the node c...

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Application Information

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IPC IPC(8): H02J3/04
Inventor 江辉彭建春
Owner SHENZHEN UNIV
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