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Calculation method of distribution network loss sensitivity based on helm

A technology of network loss sensitivity and calculation method, which is applied in the field of calculation of distribution network network loss sensitivity based on HELM, and can solve problems such as no relevant literature research

Active Publication Date: 2021-08-10
HANGZHOU DIANZI UNIV
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Problems solved by technology

[0006] When the traditional sensitivity analysis method is used to select the reactive power compensation point of the distribution network, there are the following problems: Usually, the network loss and reactive power sensitivity sorted by the power flow before compensation is sorted, and the result is often several adjacent nodes on the same branch.
However, there is no relevant literature research on how to use HELM to calculate the relative sensitivity.

Method used

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  • Calculation method of distribution network loss sensitivity based on helm
  • Calculation method of distribution network loss sensitivity based on helm
  • Calculation method of distribution network loss sensitivity based on helm

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Embodiment Construction

[0072] The present invention will be further described below in conjunction with accompanying drawing.

[0073] a. Reference figure 1 , the present invention follows the steps:

[0074] b. Step (1): Establish a mathematical model of the distribution network:

[0075]

[0076]

[0077] 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.

[0078] c. Use HELM (holomorphic function embedding method) for power flow calculation.

[0079] From the nodal power equation

[0080]

[0081] Constructs an inline pure virtual function

[0082]

[0083] suppose

[0084] When s=0, you can get:

[0085]

[0086] From this formula we can find c k [0].

[0087]

[0088] According to the coefficients of the S series are equal, it can be known that d k [0]=1 / c k [0].

[008...

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Abstract

The invention discloses a HELM method for calculating the network loss sensitivity of a distribution network. The invention first uses HELM to calculate the power flow of the distribution network, and then calculates the sensitivity of the voltage to the injected power of each node according to the sensitivity calculation method based on the HELM. Secondly, according to the sensitivity of the voltage to the injected power of each node, the sensitivity of the total network loss of the system to the injected power of each node is calculated. Finally, according to the sensitivity of the total network loss of the system to the injected power of each node, the scheme of reactive power compensation points is obtained. The invention uses the HELM method to consider the non-linear factor of the sensitivity, and the reactive power compensation scheme can reduce the network loss of the system more, have less investment and better economy.

Description

technical field [0001] The invention belongs to the technical field of electric power information, and relates to a HELM (holomorphic function embedding)-based calculation method for network loss sensitivity of a distribution network. Background technique [0002] The determination of the reactive power compensation point of the distribution network generally adopts the voltage or network loss reactive power sensitivity analysis method, that is, the reactive power compensation point is determined first by sorting the loss reduction effect brought about by injecting unit reactive power at a certain point [1] . [0003] The determination of reactive power compensation points generally includes voltage or network loss reactive power sensitivity analysis method, reactive quadratic accurate moment, load power impedance moment method, modal analysis method, reactive quadratic accurate moment method or hierarchical clustering method, etc. Method partition method, dynamic compensat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06H02J3/18
CPCH02J3/06H02J3/18H02J3/1871Y02E40/30
Inventor 高慧敏赵嘉敏陈建琳罗平
Owner HANGZHOU DIANZI UNIV
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