Node reactive voltage sensitivity determination method
A technology of voltage sensitivity and determination method, which is applied in reactive power compensation, AC network voltage adjustment, circuit devices, etc. The process of sensitivity is simple, the effect of improving the determination efficiency and simplifying the process of node reactive voltage sensitivity
Active Publication Date: 2017-01-25
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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[0003] The existing methods for determining the reactive voltage sensitivity of nodes are: through the time domain simulation of the power system to simulate the reactive power changes of the nodes, and through the power flow calculation model of the power system, the reactive voltage sensitivity of each node is determined, but each obtained The reactive voltage sensitivity of a node requires a time-domain simulation, which makes the process of obtaining the reactive voltage sensitivity of the power system node more complicated, and the calculation amount in the process is large and time-consuming, resulting in the reactive voltage sensitivity of the power system node. The determination efficiency is low
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[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0026] Embodiments of the present invention provide a method for determining reactive voltage sensitivity of nodes, such as figure 1 As shown, the determination method of reactive voltage sensitivity of this node includes:
[0027] Step S1. Obtain the self-impedance Z of the i-th node in the N nodes of the power system network ii , where i=1,2,...,N.
[0028] Step S2, according to the self-impedance Z of the i-th node ii , to obtain the paralle...
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The invention discloses a node reactive voltage sensitivity determination method, and relates to the technical field of electric power system analysis and solves the technical problems that an existing node reactive voltage sensitivity determination method is complex and lower in efficiency. The node reactive voltage sensitivity determination method comprises the steps of obtaining the self impedance of an ith node in N nodes of an electric power system network; obtaining the shunt reactive variable quantity of the ith node according to the self impedance of the ith node; obtaining the voltage change module value of a jth node in the N nodes, wherein the voltage change of the jth node is caused by shunt reactive change of the ith node; obtaining the reactive voltage sensitivity of the jth node according to the shunt reactive variable quantity of the ith node and the voltage change module value of the jth node. The node reactive voltage sensitivity determination method is used for determining the reactive voltage sensitivity of the nodes in an electric power system.
Description
technical field [0001] The invention relates to the technical field of power system analysis, in particular to a method for determining reactive voltage sensitivity of nodes. Background technique [0002] The reactive voltage problem of power system nodes is one of the important issues for the safe and stable operation of the power system. When the voltage level in a certain area deviates more from the normal level, but the feasible reactive power adjustment means are insufficient, it is necessary to take relevant reactive power adjustment measures in the nearby area. The reactive voltage sensitivity of a node refers to the change of the voltage value of the node caused by the reactive power change of the node) is small, and the nearby area needs to provide more reactive power regulation to meet the voltage regulation demand of the target area. It will deteriorate the system power flow and reactive power voltage balance, and reduce the static voltage stability of the system...
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IPC IPC(8): H02J3/16
CPCH02J3/16H02J2203/20Y02E40/30
Inventor 张帆黄冠标王长香
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD