Electronic Distribution Power Transformer.

Electronic Distribution Power Transformer.

1. It is mainly used for voltage transformation and insulation

2. These transformers were designed to avoid the introduction of different active power filters in distribution systems mainly due to the increase in non-linear loads.

3. The scheme of this controller is divided into:

   • In the first, the wave voltage is converted into a high-frequency signal
   • In the second, the signal is split into a power waveform
   • The isolation between these two systems is the main function of this transformer

4. DEPT can be performed without direct current bonding and with bonding.

5. The three-phase and 4-wire power supply is used to supply the necessary requirement on the single-phase load, this source consists of three parts

   • Input
     • It is a three-phase PWM rectifier
       • which converts the primary voltage of the supply frequency into the known direct current voltage.
   • Insulation
     • Which has an H-bridge voltage converter (VSC) located at the front, as well as a high-frequency transformer, which consists of multiple coils and three H-bridge VSC at the rear.
       • The direct current voltage of the input is introduced into the VSC in order to form three DC link voltages, for this it must be modulated in a high frequency square wave, to couple to the secondary transformer and is rectified.
   • Output
     • It consists of three single-phase connected in YN through their output terminals.
       • Converts DC voltages to sinusoidal AC voltages.

6. Requirements

   • In its primary system it cannot inject harmonics, to avoid this, the incoming current must be sinusoidal, being in PHASE with the input voltage in order to have a unitary input power factor.
   • It should be noted that when there is a cross coupling between the shafts, which affect the system, the d-q voltage decouplers are used, adding control components among other elements to obtain a constant DC voltage.
   • The output must provide a constant and clean voltage, for this each single-phase to function independently must be controlled as a single-phase sinusoidal voltage source, for this the RMS value is entered in order to achieve the regulation of the outer loop obtaining a turn a constant output RMS value, however, if it follows a sinusoidal shape a P driver is used.

7. Characteristics

   • That when doing a simulation in Matlab it is evidenced that the output voltages are sinusoidal and constant and that the input current is in phase and is sinusoidal
     • That is, it can perform the power quality control and at the same time make the change of the different levels of tension and the transmission of energy.
   • This, like the conventional power transporter, can achieve transforming the voltage and the insulation, in addition to providing a three-phase and 4-wire source to the users; however, the DEPT offers rapid voltage regulation, harmonic suppression, as well as reactive power compensation.

Images and files in the map