Power Quality Study
Power Quality Study of any electrical infrastructure reveals to what
degree does the installed system adheres to an ideal system. It is an
exhaustive exercise for in depth assessment of the existing electrical
network, identification of all power quality issues and designing of
suitable solution to preempt any future failures to ensure uninterrupted
operation and zero downtime.
In recent years, there has been considerable increase in the use of non-linear loads, such as computers, UPS, AC drives, DC drives, welding machines, CNC machines, electronic lighting elements etc. Such loads have several advantages; precision control, reduced energy consumption, and smooth operation. Unfortunately, non- linear loads draw distorted current from the source leading to severe power quality issues. These issues if left unaddressed can potentially result in expensive failures or interruption in production.
Being an original equipment manufacturer (OEM) for a wide range of power quality solutions with our in house R&D expertise, we are in a unique position to leverage our experience to help you identify the root cause of your problems and design the best possible solution to address your unique needs.
Power Quality Analysis focusses primarily on the following aspects:
Power Factor is the ratio of Useful (kW) Power and Total (kVA) Power drawn by any facility. Ideally, a facility should draw (and pay for) only Useful (kW) Power. Power Factor should be maintained close to unity. Low Power Factor results in increased energy bills without any increase in productivity.
Harmonic frequencies are integral multiples of fundamental supply
frequency. Voltage and current harmonics have undesirable effects on
power system operation and elements like switchgears, bus bars,
generators, transformers etc.
A non linear load draws harmonic current components overlapped on the fundamental frequency components resulting in distortion of the overall current waveform. Current harmonic distortion lead to voltage harmonic distortion which is a primary cause of failures in facilities.
Unbalance - Current
Unbalance in a 3-Phase system is marked by a difference in magnitude between the Phase Voltages/Currents or when the phase separation is not 120 (counter clock) degrees. It is always desired that load unbalance is kept low.
High Neutral Current can be a result of unbalanced distribution of
single phase loads or due to the use of loads generating zero sequence
Power Quality analysis also includes root cause analysis of issues including:
- Failure of precision equipments, drives
- Nuisance triping of switchgears/ equipment
- Failure of capacitor banks
- Failure of transformer windings
- Failure of electronic cards
- Overloading and hunting of backup Generators
- Overheating of bus bars and noise
Energy Consumption study
Energy consumption is continuously on the rise and so is the cost of
energy. Thus, it becomes essential to identify and eliminate all
possible leakages. Electrical Energy Consumption study takes into
account the consumption profile of all major equipments over elongated
period of time and identifies scope for improvements. The findings are
compiled in the form of an action oriented report for the client and
detailed recommendations are provided to reduce losses wherever possible.
Energy consumption Study is an extension of Power Quality study but with primary focus on the energy consumption profile of the sources and major loads.
Our recommendations to address the identified issues help clients realize significant savings due to reduced losses, optimum capacity utilization of the existing infrastructure, increased life of transformers, generators, switchgears and cables. The client also benefits due to improved reliability of electrical network and reduced failure of sensitive equipments.
Transformer efficiency study
Efficiency of all transformers deteriorates over time, this can result
in increased losses and high energy bills. The efficiency of transformer
is maximum when core losses are equal to copper losses. Typically,
losses increase due to degradation of the core, windings or due to
repair work carried out on the transformer windings after a failure.
Even a small reduction in efficiency can significantly increase the
operating expenses therefore, it is of paramount importance to keep a
track of the transformer performance.
The analysis is carried out by connecting two power analyzers simultaneously on the HT and LT sides of the transformer. The recordings for various electrical parameters are taken for approximately 24 hours with sampling time of one second. The analysis helps the client calibrate the installed LT and HT meters and check the power factor profile as well.
Thermography for electrical system is done to inspect electrical system
for a wide range of problems including loose connections, corroded
elements, load imbalance, short circuts and other potentially dangerous
faults that typically create heat. Thermal imaging with infrared cameras
enables you to see the invisible thermal radiation that may indicate
imminent problems before their condition becomes critical. The existence
of abnormally high resistance in the circuit or high current flow will
result in abnormally high levels of heat to be generated that can be
quickly identified with a thermal imager avoiding potential damage to
equipment, unscheduled downtime or danger.
Thermal imaging of Thermal Insulations is used to validate the performance and quality of insulation in homes and commercial buildings and industrial process pipelines. With the ever-increasing costs of energy, the return on investment for an energy audit and subsequent repairs becomes more and more compelling.
A Boiler is an enclosed vessel that provides a means for combustion heat
to be transferred into water until it becomes heated water or steam. The
hot water or steam is then usable for transferring the heat to a process.
The performance parameters of boiler, like efficiency and evaporation ratio reduces with time due to poor combustion, heat transfer surface fouling and poor operaion and maintenance. Even for a new boiler, reasons like deteriorating fuel quality, water quality etc. can result in poor boiler performance. Boiler efficiency analysis helps us to find out deviation of boiler efficiency from the designed efficiency and target problem areas for corrective action.
Boiler analysis allows determining quantitatively the scope of improvement on the considered installation and savings that can be expected by adopting suitable measures. It aims to grab energy saving opportunities by estimating the efficiency of boiler, identifying major leakages in the system and recommending suitable corrective measures wherever possible.
Heating, Ventilation, and Air-Conditioning (HVAC) system is employed in
industries to maintain good indoor air quality through adequate
ventilation with filtration and provide thermal comfort.
Air Conditioning and refrigeration consume significant amount of energy in buildings and in process industries. The energy consumed in air conditioning and refrigeration systems is sensitive to load changes, seasonal variations, operation and maintenance, ambient conditions etc.
The purpose of performance assessment is to verify the performance of the installed refrigeration system by using field measurements. The test measures net cooling capacity and energy requirements, at actual operating conditions. The objective of the test is to estimate the energy consumption at actual load vis a vis design condition.
The study grabs energy saving opportunities by estimating the co-efficient of performance, identifying major leakages in the system and recommending suitable corrective measures wherever possible. HVAC study focuses on the major components of HVAC such as chiller units, cooling towers and AHUs.