Abstract
There is a need for induction filter technology in the field of low-voltage distribution networks. This paper proposes an induction filter distribution transformer with a unique Dd0yn11 three-winding configuration. This approach allows for the control of load side harmonics in low-voltage distribution networks. At present, the induction filter technology proposed in the known literature is mostly used in the high-voltage power system, but there is still no research on the application of induction filter technology to the distribution transformer with Dyn11 under the low-voltage distribution network. In this paper, the wiring scheme of inductive filter distribution transformer and filter system in low-voltage distribution network is established firstly, then the mathematical relationship between the harmonic current generated by the load side and the current on the grid side is derived according to the winding model, and it can be deduced that the induction filter distribution transformer with its filtering system has good filtering performance and reactive power compensation characteristics. Finally, the experiment simulates the three-phase harmonic load, detects the current waveform and other parameters of the actual grid side of the new transformer, verifies the correctness of the theoretical analysis. The induction filter distribution transformer proposed in this paper provides a new solution for harmonic suppression and reactive power compensation in low-voltage distribution network, which fills the vacancy of the application of induction filter technology in low-voltage distribution network, This paper reveals that the inductive filter technique has a good filtering performance when applied to low-voltage distribution network. And it provides a reference for further research on improving power grid efficiency, saving energy cost and improving transformer electromagnetic environment under low-voltage distribution network.
Highlights
Nowadays, power electronic technology has been widely applied to the power system, involving industrial, agricultural, public, civil and other fields of electrical equipment [1]
To verify the actual filtering effect of harmonics, the current waveform of Fig.9 is analyzed by spectrum, and the value of grid side nth harmonic current of induction filter distribution transformer and traditional distribution transformer are detected by harmonic detector
In this paper, a new connection scheme is proposed for induction filter technology in the application on low-voltage distribution network, by establishing a mathematical model, the derivation formula reveals the unique filter mechanism inside the induction filter distribution transformer, and under the supporting full tuning filters, the filters take into account the reactive compensation function while filtering
Summary
Power electronic technology has been widely applied to the power system, involving industrial, agricultural, public, civil and other fields of electrical equipment [1]. The induction filter technology proposed in [11]–[15] is different from the traditional harmonic control scheme It is based on the magnetic potential balance between the transformer windings. It is a three-winding structure, connected by Dd0yn. ANALYSIS OF HARMONIC SUPPRESSION EFFECT OF INDUCTION FILTER DISTRIBUTION TRANSFORMER In the case of nth harmonic, if the grid side system impedance is ignored, the grid side voltage U A(n1)B1 = 0, Substitute it into (9) we can get the following results: IA(n1)B1. It can be seen that if the traditional distribution transformer does not adopt harmonic control, the harmonic current generated by load side will be transferred to the grid side according to the ratio of winding turns. For induction filter distribution transformer, because of its unique winding structure, harmonic current can be perfectly filtered by the filter side so as not to enter the grid side winding, and harmonic suppression can be achieved
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
