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9
3.4 Measurements
3.4.1 Overview
By default, the homepage displays an
Overview
of network properties and system settings:
Item
Description Section
Vrms (L1-3)
RMS value of all line-to-neutral (4-wire mode) and line-to-line (3-wire mode) voltages
3.4.2
THDv (L1-3)
Total harmonic distortion on all line-to-neutral
(4-wire mode) and line-to-line (3-wire mode) voltages
3.4.2
V1 (L1-3)
RMS value of the fundamental component of all line-to-neutral
(4-wire mode) and line-to-line (3-wire mode) voltages
3.4.2
Frequency
Network frequency
V dc bus
Voltage of the DC capacitor in the Module
3.4.2
Irms (L1-3)
RMS value of all line currents measured at the position of the CT
3.4.3
Irms (N)
RMS value of the neutral current (4-wire mode)
3.4.3
THDi (L1-3)
Total harmonic distortion on all line currents
3.4.3
I1 (L1-3)
RMS value of the fundamental component of all line currents
3.4.3
AIP Irms (L1-3)
RMS value of the 3 phase inverter current
3.4.4
AIP Irms (N)
RMS value of the neutral inverter current (4-wire mode)
P
Active power on the network at the location of the CTs
3.4.5
Q
Reactive power on the network at the location of the CTs
3.4.5
S
Apparent power on the network at the location of the CTs
3.4.5
Power Factor
Ratio of true power over apparent power on the network taking into
account the fundamental and harmonic values of the measurements
3.4.5
cos φ
Displacement power factor based on only the fundamental values of the measurements
3.4.5
T control
Temperature of the main control board in the monitored module
3.4.6
T control max
Temperature of the hottest main control board in a system of
multiple modules connected in parallel
3.4.6
T IGBT
Temperature of the IGBT in the monitored module
3.4.6
T IGBT max
Temperature of the hottest IGBT in a system of modules connected in parallel
3.4.6
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Table 4: Overview of electrical network properties and system settings