General method for calculating tide of positive power distribution networks

A technology of active distribution network and power flow calculation, which is applied in the direction of calculation, electrical digital data processing, special data processing applications, etc., and can solve the problems of complex and flexible operation mode of distribution network network

Active Publication Date: 2014-08-06
永春县产品质量检验所福建省香产品质量检验中心国家燃香类产品质量监督检验中心福建
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Problems solved by technology

The access of distributed power sources adds new node types to the distribution network, and the characteristics of multi-feeder or single-feeder power supply and ring network make the network operation mode of distribution network complex and flexible

Method used

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  • General method for calculating tide of positive power distribution networks
  • General method for calculating tide of positive power distribution networks
  • General method for calculating tide of positive power distribution networks

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Embodiment Construction

[0070] The specific application method of the present invention will be further described below in conjunction with the modified IEEE33 active power distribution system example, and the reliability, stability and versatility of the present invention to various forms of active power distribution networks will be verified.

[0071] A general method for calculating the power flow of an active distribution network, specifically comprising the following steps:

[0072] Step 1: Establish various distributed power flow calculation models

[0073] 1) PQ node type DG

[0074] The PQ node type DG outputs constant active and reactive power, and it is treated as a "negative" load in the power flow calculation. It is usually DG such as double-fed induction wind power generation and photovoltaic power generation controlled by constant power factor. The calculation model is:

[0075] P DG = ...

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Abstract

The invention provides a general method for calculating the tide of positive power distribution networks. The general method comprises the step of establishing various distributed generation (DG) tide calculation models to obtain a PV node sensitivity reactance matrix BPV of nPV PV type DG positive power distribution networks so as to calculate the tide of the positive power distribution networks. The general method is high in universality, can be used by power distribution networks with various wiring modes and operating modes, and also can be used for calculating the tide of power distribution networks at disconnected areas; the topological analysis of the power distribution networks is not needed, various path matrixes do not need to be calculated, and a node admittance matrix can be directly figured out according to node information and branch information, so that the general method is simple and is easy in implementation; the accurate PV node sensitivity reactance matrix is adopted, so that the convergence speed of reactive power output of the PV node type DG is enhanced; on the basis of a Zbus method, the calculation of the whole convergence speed is fast, and the stability is good; the generable method can be expanded to calculation of three-phase tides.

Description

technical field [0001] The invention relates to a general method for calculating the power flow of an active distribution network. Background technique [0002] Distribution network power flow calculation is an important content of distribution system analysis, and it is an important basis for quantitative analysis of the rationality, reliability and economy of distribution network system planning, design and operation mode. With the rapid development of distributed generation technology and users' requirements for high power supply reliability, the traditional single-feeder radial distribution network will not be able to meet the requirements. The future-oriented active distribution network will have the characteristics of distributed power supply, multi-feeder or single-feeder power supply, and multi-ring network. The traditional forward and backward power flow calculation method of distribution network will no longer be commonly used in active distribution network. The a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 何小栋张强左智勇
Owner 永春县产品质量检验所福建省香产品质量检验中心国家燃香类产品质量监督检验中心福建
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