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sarayut
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I'd like to know how do i find I2 (Negative sequence current) if I know Ia, Ib and Ic but don't know angle (in normal system_not fault)? My system's 3 phases 3 wires.
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Negative sequence is a type of unbalance in three-phase electrical systems where the three phases have unequal magnitudes and/or phase angles. It is caused by an asymmetrical fault or by unbalanced loads.
Negative sequence is represented by the negative sequence component in symmetrical components analysis. It is one of the three components used to analyze and understand unbalanced conditions in three-phase systems.
Negative sequence can cause overheating and damage to equipment, voltage fluctuations, and increased power losses. It can also lead to motor torque pulsations and reduced motor efficiency.
Negative sequence can be detected and measured using specialized instruments such as sequence component monitors and power quality analyzers. These instruments can analyze the voltage and current waveforms to identify the presence and magnitude of negative sequence.
Negative sequence can be mitigated and corrected by balancing the three-phase loads, improving the grounding system, and using specialized equipment such as static VAR compensators. Additionally, proper maintenance and regular testing can help identify and address any negative sequence conditions in the system.