| Power flow calculation is the basic tool for power distribution system analysis.Distribution network planning,transformation and reconstruction can’t be separated from the steady state calculation of power distribution system power flow.At present,with the upgrading of distribution system’s structure,the level of intelligence has gradually increased,and its network parameter has become more complicated,which has brought new challenges to power flow calculation method of the distribution system.So,this thesis studies power flow calculation of distribution system,so as to provide effective methods for researchers of distribution network planning,design and operation and scheduling,it has practical significance and application value.Based on the network structure of power distribution system,a power flow calculation model for distribution network based on generalized Tellegen’s theorem was constructed based on the basic circuit theory.In order to improve the calculation speed of the power flow algorithm in the distribution system,a power flow algorithm based on generalized Tellegen’s theorem for distribution network was proposed based on the comparative analysis of power flow calculation methods in a typical power distribution system.This method used Newton method to calculate power flow of the distribution system only once.Based on this,combining generalized Tellegen’s theorem to solve adjoint network equations has advantages of simplicity and fastness.Small disturbance theorem of generalized Tellegen’s theorem was used to obtain the new power flow calculation correction equation of power distribution system,and power flow calculation method specific steps of power distribution system were given.The proposed method was applied to power distribution network of IEEE 33-bus system for power flow calculation and compared with Newton method.The results showed that power flow calculation method proposed in this thesis has rapidity and accuracy. |
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