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Method and device for adjusting node voltage in power system

A technology of power system and node voltage, applied in the field of power, can solve problems such as low efficiency, achieve the effect of improving efficiency, ensuring accuracy, and avoiding manual analysis

Pending Publication Date: 2021-01-22
YUNNAN POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The application provides a method and device for adjusting node voltage in a power system, which can be used to solve the problem of low efficiency caused by manually adjusting node voltage in the prior art

Method used

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  • Method and device for adjusting node voltage in power system
  • Method and device for adjusting node voltage in power system
  • Method and device for adjusting node voltage in power system

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Embodiment Construction

[0044] In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0045] Such as figure 1 As shown, it is a schematic flowchart of a method for adjusting node voltages in a power system provided by an embodiment of the present application. The embodiment of this application includes the following steps:

[0046] Step 101, according to the first voltage value of each node in the power system before the power flow adjustment and the second voltage value of each node after the power flow adjustment, determine the first voltage difference value of each node.

[0047] Specifically, assuming that there are N nodes in the power system, the first voltage value of the node numbered i before power flow adjustment is expressed as The set of first voltage values ​​of N nodes before power flow adjustment...

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Abstract

The invention provides a method and a device for adjusting node voltage in a power system. The method comprises the steps of determining a first voltage difference value of each node according to a first voltage value of each node in a power system and a second voltage value of each node; if the first out-of-limit node exists, determining a to-be-adjusted voltage vector; determining a target reactive compensation node and a target power generation node; determining a reactive power sensitivity matrix according to the Jacobian matrix and a preset unit reactive power value; determining a voltagesensitivity matrix according to the Jacobian matrix and a preset unit voltage value; determining an overall sensitivity matrix according to the reactive power sensitivity matrix and the voltage sensitivity matrix; determining an adjustment vector according to the overall sensitivity matrix and the to-be-adjusted voltage vector; and correspondingly adjusting the reactive power value of the targetreactive compensation node and the voltage value of the target power generation node according to the adjustment vector. According to the method provided by the invention, a large amount of manual analysis is avoided, and the efficiency is improved.

Description

technical field [0001] The present application relates to the field of electric power technology, in particular to a method and device for adjusting node voltages in a power system. Background technique [0002] The power system is a dynamic system, and its branch transmission power, node voltage, etc. are constantly changing (the power flow of the power system is called "power flow"), for example, the increase in electricity consumption leads to changes in the power flow of the power system. In order to cope with various changes in the power system and ensure the safety and stability of the power system, staff need to simulate the possible future states of the power system. When simulating different states, it is necessary to adjust the corresponding power flow adjustment. In power system simulation, a generator or a section of bus corresponds to a node in the power system, and the voltage of the node is closely related to the power flow. After the power flow is adjusted,...

Claims

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Application Information

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IPC IPC(8): H02J3/16
CPCH02J3/16H02J2203/20H02J2203/10Y02E40/30
Inventor 司大军朱欣春李玲芳周俊东孙鹏游广增陈义宣陈姝敏何烨肖友强
Owner YUNNAN POWER GRID
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