Reactive Power Optimization Method of Distribution Network Based on Helm Sensitivity Calculation

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

Active Publication Date: 2021-08-10
HANGZHOU DIANZI UNIV
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  • Reactive Power Optimization Method of Distribution Network Based on Helm Sensitivity Calculation
  • Reactive Power Optimization Method of Distribution Network Based on Helm Sensitivity Calculation
  • Reactive Power Optimization Method of Distribution Network Based on Helm Sensitivity Calculation

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[0046] The following is attached figure 1 The present invention is further described.

[0047] a. Reference figure 1 , the reactive power optimization of the present invention follows the steps:

[0048] b. Step (1): Establish a reactive power optimization model of the distribution network:

[0049]

[0050] In the formula: k d is the active power price of the system; P L is the active power loss; τ is the running time under this load level; Q i is the reactive power compensation capacity of node i; P C is the unit price of reactive power compensation capacity; k α is the depreciation maintenance rate of the reactive power compensation device; k γ is the return on investment of the reactive power compensation device; λ V is the voltage limit penalty factor; V ilim is the upper or lower limit of the voltage, when V i >V imax when V ilim =V imax ; when V i imin when V ilim =V imin , when V imin i imaz , take V i -V ilim =0.

[0051] Restrictions:

[0052]...

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Abstract

The invention discloses a reactive power optimization method of a distribution network based on HELM sensitivity calculation. The invention first uses HELM to calculate the distribution network power flow, and then calculates the voltage nonlinear sensitivity according to the HELM-based sensitivity calculation method. Secondly, sort out the point with the largest nonlinear sensitivity outside the node set of reactive power to be compensated, and determine the node set of reactive power to be compensated. Finally, the reactive power compensation amount corresponding to the compensation point is calculated according to the genetic algorithm. The present invention uses the HELM method to consider the nonlinear factor of the sensitivity, uses the nonlinear sensitivity to calculate the voltage deviation in the objective function, and considers the influence of the nonlinearity of the system on the objective function, and the compensation scheme reduces the network loss of the system more, with less investment and economical Sex is better.

Description

technical field [0001] The invention belongs to the technical field of electric power information, and relates to a reactive power optimization strategy of a distribution network based on HELM (holomorphic function embedding) power flow calculation and sensitivity calculation methods. Background technique [0002] Due to historical reasons, there has been a large power gap for a long time in our country. Therefore, the construction of power sources is obviously stronger than the construction of power grids. The problem of active power dispatching is emphasized while the problem of reactive power dispatching is ignored, especially the reactive dispatching of distribution networks. , causing a large amount of reactive power to flow in the distribution network, which not only increases the active power loss of the distribution network, but also affects the voltage quality of the distribution network. At present, the power sector has gradually paid more attention to the problem ...

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Application Information

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IPC IPC(8): H02J3/50H02J3/48H02J3/06
CPCH02J3/06H02J3/48H02J3/50
Inventor 高慧敏陈健琳张巍巍罗平汪义旺
Owner HANGZHOU DIANZI UNIV
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