Method for symmetrically acquiring loss power sensitivity from AC-DC hybrid power system

A technology of AC-DC hybrid connection and power loss, applied in the field of electric power engineering, can solve the problems that the work does not conform to the circuit laws, and cannot reflect the active power driving effect of the DC feed system on the active power.

Inactive Publication Date: 2015-01-28
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 loss power sensitivity of the AC-DC hybrid power network, aiming to solve the problem that the existing method for obtaining the loss power sensitivity of the AC-DC hybrid power network ca

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  • Method for symmetrically acquiring loss power sensitivity from AC-DC hybrid power system

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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 method for obtaining power loss sensitivity of an AC / DC hybrid power grid, which 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] The sensitivity of the node voltage vector to the node injection power vector is obtained according to the relationship equation between the independent vector, the node voltage vector and the independent vector, and the relationship equation between the node inj...

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Abstract

The invention belongs to the electrical engineering field and discloses a method for symmetrically acquiring loss power sensitivity from an AC-DC (alternating current-direct current) hybrid power system, and the method comprises the following steps of: acquiring an independent vector of the AC-DC hybrid power system according to the known power flow solvability of the system, infusing a relation equation among a power vector, an independent vector and a node voltage vector according to the relation equation between the node voltage vector and the independent vector to acquire the sensitivity of infusing the power vector into the node by the node voltage vector, according to the sensitivity and the known functional relationship of the node voltage vector related to the loss power vector of the AC-DC hybrid power system, and acquiring the sensitivity of infusing the power vector into the node by the loss power vector of the AC-DC hybrid power system so as to symmetrically acquire the loss power sensitivity, wherein the loss power sensitivity can show that the direct current feed-in system has the instigating effect to active power and the instigated effect to reactive power, and the generator connected with reference points meets the circuit law in the AC-DC hybrid power system.

Description

technical field [0001] The invention belongs to the field of electric power engineering, and in particular relates to a symmetrical acquisition method of loss power sensitivity of an AC / DC hybrid power network. Background technique [0002] At present, the optimal reactive power planning, node voltage adjustment and power flow control of the AC / DC hybrid power grid need to be obtained in advance on the premise of obtaining the sensitivity of its loss power to the node injection power. [0003] The existing methods for obtaining the loss power sensitivity of the AC-DC hybrid power grid are all 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 AC-DC hybrid power network The power balance equation of the reference node (the reference node is a node whose voltage phase is set to zero artificially specified), so the sensitivity of the loss power of the AC-DC hybrid po...

Claims

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Application Information

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IPC IPC(8): H02J3/04
CPCH02J3/04
Inventor 江辉彭建春
Owner SHENZHEN UNIV
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