The question "What is power quality?" has many different answers, depending on whether you talk to utilities, equipment manufacturers, or power customers. There is a wide range of factors that can cause power quality problems in your facility. Our experience has shown that power quality problems are compounded by the difficulty of identifying potential causes. This is primarily because the cause may be within your facility or hundreds of miles away on the utility power grid. Power quality investigations focus on the cost impact of power problems. These can include
Each problem can generate a number of these costs. Predicting the exact cost is difficult, but poor power quality and poor power system performance can cause sufficient losses to justify fixing the problem.
Modern power systems are highly complex, and to ensure reliable performance, require consideration of all issues, probable problems and their causes, and potential solutions. Our over ten years of experience in power and distribution system studies, and our extensive track record in working with customers and their power providers to identify and solve power system problems, makes us the people to call. The PQAudit (power quality audit) can address all aspects of power quality. It focuses on common issues such as harmonic distortion, low voltage, voltage sags, wiring and grounding, and poor power factor. By using the PQAudit, you can identify potential problems, plan and take corrective measures, and prevent facility downtime, saving both time and money.
Before performing an onsite survey, it is important to review your facility's power system performance. This preliminary analysis characterizes the problem, identifies important changes to the facility or to the electric supply system (equipment or wiring changes, modifications, etc.) that could be causing power quality problems, and helps determine a plan for the site survey. Consisting of a conference call, this preliminary review sets the stage for the site survey. Thanks to our expertise, we can sometimes diagnose current or potential problems at this stage, thus reducing the need for or scope of the onsite survey and helping to focus attention where it is most needed.
Power Quality Site Survey - Customer Information
Site survey & field measurements
The site survey is designed to gather information about the facility, power quality problems, and affected equipment. Examples of questions asked and information gathered during this site visit include:
Field measurements are completed in conjunction with the onsite power system and equipment inspection. Example measurement quantities include dc drive line current, bus voltages, and harmonic distortion levels, as well as power factor. Standard reporting forms are used to document all information and measurements.
Example Harmonic Distortion Spot Measurement
Following the preliminary review and site visit, we will prepare a technical report summarizing the findings of the audit. This report will include a summary of all of the information gathered, highlighted power system problems, a summary of field measurements, suggested solutions, and recommendations for follow-on power system monitoring or engineering analysis. This report introduces you to the scope and nature of any problems, and provides an excellent foundation for more analysis and effective power system design.
You get the entire PQAudit package at a reasonable fixed price - no open-ended cost as with other professional services. Additional analytical or engineering services are available on a quotation basis.
Click here to download the PQAudit brochure.
Click here to see a sample report.