Power distribution network load flow calculation method based on PV node-looped network comprehensive compensation matrix

A technology of comprehensive compensation and power flow calculation, applied in the field of distribution network, can solve the problem that the compensation method cannot fully adapt to the calculation requirements, and achieve the effect of good application prospects and ingenious ideas.

Inactive Publication Date: 2014-03-05
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome that with the increasing complexity of the distribution network, the existing network is no longer a network with PV nodes or a ring network, but a complex network that may appear at the same time. situation, the original compensation method can no longer fully meet the calculation requirements

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  • Power distribution network load flow calculation method based on PV node-looped network comprehensive compensation matrix
  • Power distribution network load flow calculation method based on PV node-looped network comprehensive compensation matrix
  • Power distribution network load flow calculation method based on PV node-looped network comprehensive compensation matrix

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] like figure 1 Shown: The distribution network power flow calculation method based on the PV node-ring network comprehensive compensation matrix, including the following steps,

[0028] Step (1), read the data of the distribution network, determine the position of the ring network and the disconnection point, and construct the PV node-ring network comprehensive compensation matrix.

[0029] like figure 2 and 3 , the steps to determine the location of the ring network and the disconnection point are as follows: First, establish the node relationship matrix using the hierarchical numbering principle. It is confirmed as a ring network, and then the ring network is de-ringed, and the position of the disconnection point is determined by the equal-level method; the equal-level method is two new nodes formed after the disconnection point is disconnected, and the dif...

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Abstract

The invention discloses a power distribution network load flow calculation method based on a PV node-looped network comprehensive compensation matrix. On the basis of the PV node-looped network comprehensive compensation matrix put forward according to the Kirchhoff law, various impedances of PV nodes are determined according to the fact that the PV nodes take the load flow one-direction performance into consideration; for a looped network, through current compensation of the looped network, voltages of cut-off points of the looped network are kept the same. The problem that because influences of particularity of DG nodes and operation of a weak looped network can not be taken into comprehensive consideration with an existing power distribution network load flow calculation method, the method is out of operation is solved, the method is effective for power distribution network load flow calculation containing various distributed power sources and having a looped network, and the method is ingenious in idea and has good application prospects.

Description

technical field [0001] The invention relates to the technical field of distribution networks, in particular to a distribution network power flow calculation method based on a PV node-ring network comprehensive compensation matrix. Background technique [0002] Distributed power generation (DG) has the characteristics of flexible power supply, low investment cost, and improved power supply reliability. It has attracted widespread attention from various countries and has developed rapidly in recent years. The capacity of DG is small, generally between tens of kW and tens of MW , mainly distributed in the distribution network. DG is divided into two categories according to the application time: one is commonly used industrial distributed power supply, mainly including: diesel engines, gas turbines and fuel cells, etc.; the other is new distributed power supply, mainly including wind turbines, photovoltaic cells and energy storage equipment etc. [0003] The access of DG bring...

Claims

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Application Information

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IPC IPC(8): H02J3/00G06F19/00
Inventor 周恒俊朱英杰胡向阳王峰
Owner STATE GRID CORP OF CHINA
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