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HELM-based method for calculating sensitivity of voltage of power distribution network to transformation ratio of transformer

A calculation method and specific sensitivity technology, applied in the field of electric power information, can solve problems such as no relevant literature research

Active Publication Date: 2020-01-31
HANGZHOU DIANZI UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

However, there is no relevant literature research on how to use HELM to calculate the relative sensitivity.

Method used

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  • HELM-based method for calculating sensitivity of voltage of power distribution network to transformation ratio of transformer
  • HELM-based method for calculating sensitivity of voltage of power distribution network to transformation ratio of transformer
  • HELM-based method for calculating sensitivity of voltage of power distribution network to transformation ratio of transformer

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Embodiment Construction

[0097] The following is attached Figure 1-4 The present invention is further described.

[0098] refer to figure 1 , the present invention calculates the sensitivity of the node voltage to the transformer ratio based on the power flow calculation of the HELM distribution network,

[0099] (1) Establish a mathematical model of the distribution network.

[0100]

[0101] In the formula: P i , Q i , V i respectively inject active power, reactive power and voltage at node i; G ij , B ij ,δ ij Respectively, conductance, susceptance and phase angle difference between nodes i and j; N is the total number of nodes.

[0102] like figure 2 As shown, (2) Use the HELM method to calculate the distribution network power flow.

[0103] From the nodal power equation

[0104]

[0105] In the formula: Y ik is the admittance of node i and node j, and m is the sum of PQ nodes.

[0106] Constructs an inline pure virtual function

[0107]

[0108] assumptions:

[0109] ...

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Abstract

The invention discloses an HELM-based method for calculating the sensitivity of the voltage of a power distribution network to the transformation ratio of a transformer. According to the method, the HELM is used for calculating the power flow of the power distribution network; and the sensitivity of the voltage of a node to the injection power of the node is calculated according to an HELM-based sensitivity calculation method; and the sensitivity of the voltage of the node to the transformation ratio of the transformer is calculated according to the voltage sensitivity calculated based on theHELM. The HELM method is utilized, so that the nonlinear factor of sensitivity is considered, and therefore, a better transformer transformation ratio adjusting scheme can be selected, and the voltagedistribution of the power distribution network is improved.

Description

technical field [0001] The invention belongs to the technical field of electric power information, and proposes a method for calculating the sensitivity of distribution network node voltage to transformer transformation ratio based on HELM (holomorphic function embedding) power flow calculation. Background technique [0002] Power system sensitivity analysis and calculation are usually used in distribution network reactive power optimization planning and control point selection, power system stability control, etc. [0003] The voltage or network loss and reactive power sensitivity analysis method is to calculate the node sensitivity according to the network power flow before compensation, and determine the reactive power compensation point first by sorting the loss reduction effect brought about by injecting unit reactive power at a certain point. [0004] When the traditional sensitivity analysis method is used to select the reactive power compensation point of the distrib...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02J3/12H02J3/06H02J3/00
CPCH02J3/00H02J3/06H02J3/12H02J3/18Y02E40/30
Inventor 高慧敏陈健琳张巍巍罗平
Owner HANGZHOU DIANZI UNIV
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