Proper system neutral and grounding methods must be employed to ensure personnel safety and service reliability. In addition, up to 24% of the power quality problems, associated with the power distribution system, are caused by inadequate or missing grounds. The grounding study determines the optimum method for grounding to provide a safe reliable system and meet the overall operating objectives of the facility. Further, the study includes performing a ground impedance evaluation to confirm grounding adequacy.
The increased inrush current during starting of large synchronous or induction motors may cause an unacceptable system voltage drop which can prevent the motor from accelerating or have an adverse effect on other system loads. The motor starting study determines system requirements or appropriate starting methods to assure the motor can accelerate to speed while normal service is maintained for other loads.
The application of non-linear loads (such as rectifiers), can subject a system to sustained high-magnitude harmonic voltage and currents especially when applied in conjunction with power factor correction capacitors. These high-magnitude harmonics will adversely affect system performance or cause equipment failure. The harmonic analysis will isolate the cause of harmonic distortion and provide corrective measures to reduce harmonic magnitudes to within acceptable limits.
Transient stability concerns power systems containing two or more synchronous machines remaining in synchronism after a major system disturbance. System stability is a major concern to many engineers, with the increasing popularity of facilities, which co-generate or maintain critical loads with in-plant generation. The transient stability study determines system design parameters and protective relay operating times necessary to maintain stability after a fault or sudden load change, and assures that critical loads will remain in service.
Facilities, which must maintain service to essential loads, require a system designed for minimum downtime. The reliability study analyzes the capability of the system to service essential loads and uses statistical data to assist in the planning, design, or upgrade. Further, the ESCO Group has extensive experience in designing and implementing emergency and standby generation capabilities in support of essential loads.
EESCO has the experience and capability to perform a broad range of specialized engineering studies and investigations such as switching transients, voltage unbalance, and ferro-resonance to solve uncommon system problems.
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