DC and AC of hydro generator

Home hydro power electricity knowledge-DC (direct current) and AC (alternating current)

There are direct current and alternating current for home hydro power. We know that the carbon pole in the middle of the dry cell is positive, the shell of zinc is negative, and the carbon pole potential is always higher than zinc skin potential. If we connect the positive and negative electrode by a line and connected with a little lamp, the current in the circuit is always from the positive electrode out of the dry cell, and through the little lamp, again from the cathode into dry cell, the current size and direction are the same. This current is known as “direct current“, short for “dc“. Battery and dc generators supply dc power.

Ac power two electrodes is different from dry cells, it has no fixed electrode. While the upper is positive, the bottom is negative; While the upper is negative, the bottom is positive, that is to say, it is change over time of electrode polarity, and the voltage between two electrodes is also change over time. If the power poles with wires connected with the light bulb, then the current capacity and direction in the circuit change with time. Ac current starting from zero, gradually increase to the maximum and then decreases down to zero, after a gradual increase in the opposite direction to the maximum negative and then gradually reduced to zero, which is a complete change course. This current and direction change over time is called “alternating current”.

The times of Alternating current (ac) to complete a change course in every second, called “Frequency” (symbol: F), with its unit is the Hertz (symbol: Hz), lots of country alternating current power frequency is 50Hz, and some countries with 60Hz.

Alternating current (ac) to complete a full change of time is called the “cycle”. For example: the frequency of 50Hz alternating current (ac) every second 50 completely change, therefore, its cycle is equal to 1/50 = 0.02 seconds.

The electricity from the micro hydro power generator, normal lighting and home power are alternating current (ac).