Method and device for obtaining power system node voltage

A technology for obtaining power and system nodes, which is applied in electrical digital data processing, special data processing applications, instruments, etc., and can solve problems such as poor node voltage calculation convergence.

Active Publication Date: 2016-08-03
STATE NUCLEAR ELECTRIC POWER PLANNING DESIGN & RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of poor convergence of node voltage calculation in the prior art, the embodiment of the present invention provides a method and device for obtaining the node voltage of the power system

Method used

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  • Method and device for obtaining power system node voltage
  • Method and device for obtaining power system node voltage
  • Method and device for obtaining power system node voltage

Examples

Experimental program
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Embodiment 1

[0082] Please refer to figure 1 , which shows a flow chart of the method for obtaining the node voltage of the power system provided by Embodiment 1 of the present invention. The method can be applied to calculate the voltage of each node in the power system, wherein the nodes in the power system can include: at least one PQ node, at least one PV node and one balance node. The method for obtaining the node voltage of the power system may include:

[0083] Step 101, obtain the network structure and component parameters of each node of the power system, the node at least includes: at least one PV node and at least one PQ node, the PV node's own active power and voltage amplitude are known, the PQ node's own The active power and reactive power are known, and the PQ node contains at least one slow convergence PQ node;

[0084] Step 102, generating an iterative total equation of the PV node and an iterative total equation of the PQ node according to the network structure and elem...

Embodiment 2

[0091]In order to further describe the method for obtaining the node voltage of the power system provided by Embodiment 1 of the present invention, please refer to figure 2 , which shows a flow chart of the method for obtaining the node voltage of the power system provided by Embodiment 2 of the present invention. The method can be used to calculate the voltage of each node in the power system, and the power system includes: at least one PQ node, at least one PV node and a balance node; wherein, since the balance node voltage amplitude and voltage phase angle are known quantities, Therefore, only the voltage amplitude and voltage phase angle of the PQ node and the voltage phase angle of the PV node need to be calculated. The method for obtaining the node voltage of the power system may include:

[0092] Step 201, the voltage calculation device receives the network structure and component parameters of each node in the power system;

[0093] Step 202, write the power system ...

Embodiment 3

[0232] Please refer to image 3 , which shows the device structure diagram of the device for obtaining the node voltage of the power system provided by Embodiment 3 of the present invention. The device for obtaining node voltages of the power system can be used to calculate the voltage of each node in the power system. The device for obtaining the node voltage of the power system may include:

[0233] The obtaining module 301 is used to obtain the network structure and component parameters of each node in the power system. The nodes include at least one PV node and at least one PQ node. The PV node's own active power and voltage amplitude are known, and the PQ node's own The active power and reactive power are known, and there is at least one slow convergence PQ node in the PQ node;

[0234] The first equation generation module 302 is used to generate the iterative total equation of the PV node and the iterative total equation of the PQ node according to the network structur...

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Abstract

The invention discloses a method and a device for calculating power system node voltage and belongs to the field of power transmission. The method includes: acquiring network structures and element parameters of nodes of a power system; generating a general iteration equation of a PV node, a general iteration equation of a PQ node, and an iteration equation of a slow-convergence PQ node according to the network structures and the element parameters; and calculating voltage of the PV node and the PQ node according to the general iteration equation of the PV node, the general iteration equation of the PQ node and the iteration equation of the slow-convergence PQ node. Due to the fact that the general iteration equation of the PV node, the general iteration equation of the PQ node and the iteration equation of the slow-convergence PQ node are generated according to the network structures and the element parameters of the power system, and the voltage of the PV node and the PQ node are calculated according to the general iteration equation of the PV node, the general iteration equation of the PQ node and the iteration equation of the slow-convergence PQ node, convergence is calculated by increasing node voltage.

Description

technical field [0001] The invention relates to the field of power transmission, in particular to a method and a device for obtaining node voltages of a power system. Background technique [0002] Power flow calculation is the calculation of the distribution of active power, reactive power and voltage in the power grid under the given power system network topology, component parameters, and power generation and load parameters. Among them, the calculation of the voltage amplitude and voltage phase angle of each node is the core part of the power flow calculation. [0003] The nodes in the power system may include at least one PV node, at least one PQ node, and one balancing node. Among them, the active power P and voltage amplitude V of the PV node are known, the active power P and reactive power Q of the PQ node are known, and the voltage amplitude V and voltage phase angle θ of the balance node are known. When performing power flow calculations for each node, only the vo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 彭谦崔映红
Owner STATE NUCLEAR ELECTRIC POWER PLANNING DESIGN & RES INST CO LTD
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