Ch 8 PV

Electrical current that flows in one direction, either positive or negative

Electrical current that changes between positive and negative directions

The number of waveform cycles in one second

The time it takes a periodic waveform to complete one full cycle before it repeats

The maximum absolute value of a waveform

A measure of the difference between positive and negative maximum values of a waveform

A statistical parameter representing the ffective value of a waveform

The unbalance that occurs when the voltages of a three-phase power supply or the terminals of a three-phase load are not equal

The complete loss of one phase on a three-phase power supply

The unbalance that occurs when current is not equal on the three power lines of a three-phase system

The unbalance that occurs when three-phase power lines are more or less that 120 degrees out of phase

A waveform component at an integer multiple of the fundamental waveform frequency

The ratio of the sum of all harmonic components in a waveform to the fundamental frequency component

A load that keeps voltage and current waveforms in phase

Is the product of in-phase voltage and current waveforms and produces useful work

An AC load with inductive and/or capacitive elements that cause the current and voltage waveforms to become out of phase

The product of out-of-phase voltage and current waveforms and results in no net power flow

The ratio of true power to apparent power and describes the displacement of voltage and current waveforms in AC circuits

A combination of true and reactive power and is given in units of volt-amperes (VA)

A device that converts DC power to AC power

An inverter whose switching devices are triggered by and external source

An inverter that can internally control the activation and duration of its switching

A device that converts AC power to DC power

A device that transfers energy from one circuit to another through magnetic coupling

A device that changes DC power from one voltage to another

A device or circuit that uses electronics to continually adjust the load on a PV device under changing temperature and irradiance conditions to keep it operating at its maximum power point

Is the effectiveness of an inverter at converting DC power to AC power