Three-phase load flow calculation method of weak looped distribution network comprising multi-type distributed power sources
A distributed power supply and weak-ring distribution network technology, applied in computing, electrical components, circuit devices, etc., can solve the problem that the three-phase power flow calculation method cannot be applied to three-phase unbalanced weak-ring power distribution with multiple types of distributed power Network three-phase power flow calculation and other issues
Inactive Publication Date: 2013-04-24
HOHAI UNIV
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[0003] Purpose of the invention: In view of the fact that the existing three-phase power flow calculation method of distribution network cannot be applied to the three-phase power flow calculation of three-phase unbalanced weak ring distribu
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[0085] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.
[0086] The method for calculating the three-phase power flow of a weak-ring distribution network with multiple types of distributed power sources specifically includes the following steps:
[0087] 1. Establish power flow calculation models for various types of distributed generation (DG)
[0088] (1) PQ node type DG
[0089] In conventional power flow calculations, the injected active and reactive powers of PQ nodes are given values, but this processing method cannot be simply extended to deal w...
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The invention discloses a three-phase load flow calculation method of a weak looped distribution network comprising multi-type distributed power sources. Firstly, the effective three-phase load flow calculation method of a weak looped distribution network is put forward in a distribution sequencing network based on a sequence component calculation method and in combination with characteristics of the weak looped distribution network and a loop analysis of a road. Secondly, detailed formula derivation of iterative computation of distributed generation (DG) of a PQ node type, a PQ (V) node type, an OV node type and a PI node type is conducted and the easy formula is introduced into the load flow calculation method. The three-phase load flow calculation method of the weak looped distribution network comprising the multi-type distributed power sources can effectively process multi-type DG and the weak looped distribution network and is distinct in calculation procedure, simple in programming, and easy to achieve. In addition, the three-phase load flow calculation method of the weak looped distribution network comprising the multi-type distributed power sources retains strong points of rapid calculation and stable convergence of a forward-back substitution method catering to branch circuits. Finally, effectiveness and good convergence of the three-phase load flow calculation method of the weak looped distribution network comprising the multi-type distributed power sources is tested and verified by means of a IEEE (institute of electrical and electronic engineers)-37 generatrix test calculation case, and the three-phase load flow calculation method of the weak looped distribution network comprising the multi-type distributed power sources has good ability of processing the multi-type DG and the looped network.
Description
technical field [0001] The invention relates to a three-phase power flow calculation method for a weak-ring distribution network with multi-type distributed power sources, and belongs to the technical field of power system analysis and calculation. 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 system planning, design and operation mode. On the one hand, the distribution network is generally ring-shaped and operates in an open loop. However, when the distribution network is reconfigured and optimized, it is necessary to calculate the three-phase power flow of the weak-ring distribution network during closed-loop operation; on the other hand, with the distribution With the rapid development of conventional power generation technology, more and more distributed generation (DG) are ...
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Inventor 杨雄卫志农孙国强孙永辉袁阳陆子刚韦延方
Owner HOHAI UNIV
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