PLS-CADD™ (Power Line Systems - Computer Aided Design and Drafting)

PLS-CADD is the most powerful overhead power line design program on the market. PLS-CADD runs under Microsoft Windows and features an easy to use graphical user interface. It integrates all aspects of line design into a single stand-alone program with a simple, logical, consistent interface. No other program can match the sophisticated engineering capabilities available in PLS-CADD. This sophistication and integration leads to more cost-effective designs being produced in only a fraction of the time required by traditional methods. The PLS-CADD solution is so clearly superior to any alternative that it has been adopted by more than 1400 organizations in over 115 countries.

Three Dimensional Engineering Model


PLS-CADD Contour Lines and Draped Bitmap

The right pane of this image shows a top view of a line superposed over an aerial photo. The contour lines were generated from the digital terrain model and can be displayed at user selected intervals. The left pane of the image shows an isometric view of the same section of line in the right pane. This image was created by "draping" the same photo shown in the left pane over a digital terrain model.

At the heart of PLS-CADD is a sophisticated three-dimensional engineering model. This model includes the terrain, the structures and all the wires. The model can be viewed in a number of different ways: profile views, plan views, plan & profile sheets, 3-D views, staking lists... The PLS-CADD model is much more than just a picture or CAD drawing since PLS-CADD understands the relationship between these elements. When you drag a structure off the current alignment PLS-CADD will generate new profiles and update all affected structure and wire positions. The effects of this structure move will be instantly visible in all views including the plan & profile sheet view. In PLS-CADD you concentrate on designing your line instead of wasting your time drafting.

Terrain Model



PLS-CADD Terrain Model Animation

 This animation cycles through 5 different representations of the same terrain:

 - Points: Surveyed points are shown;

 - Triangles: Triangulated surface passing through surveyed points;

 - Contours: Contour lines at user specified intervals;

 - Rendered Triangles: Triangles filled with color as a function of elevation and line of sight;

- Draped Orthophoto: Triangles filled with color from orthophoto.

Click here for full image PLS-CADD easily adapts to the wide range of technologies used for line surveys including total station instruments, airborne lasers and photogrammetry. It accepts survey data in both the plan and the profile coordinate systems. Survey data can be keyed in, can be digitized using the built in heads-up digitizer, or can be electronically imported from a survey data file. PLS-CADD has a customizable data import routine that can read a wide range of survey data formats.

Superposition of planimetric maps and aerial photographs can be used to better visualize the area around your line. When sufficient data are available PLS-CADD can give you an even better perspective using contour lines, color renderings and even draped aerial photographs.

Altering your line route is easily accomplished by dragging P.I. points with the mouse or by clicking on locations where you want to add or delete P.I. points. Line route changes are instantly reflected in all views.

Engineering Standards & Calculations

PLS-CADD’s engineering functions are very flexible and are easily adapted to conform to your standards. You start by defining the combinations of wind, ice, temperature and safety factors you wish to use. Next, you tell the program which combinations to use for loading trees, for insulator swing checks, for clearance checks, wire tension checks... PLS-CADD will check things your way. You can work in either imperial or metric units and can even switch back and forth between these unit systems. The fact that over 115 countries use PLS-CADD is a testament to its adaptability to a wide range of standards.

Once standards are setup you are only a few mouse clicks away from engineering calculations. Select "Structure/Check" and click on a structure and you are told if you have a structure strength or insulator swing problem. Select "Section/Sag-Tension" and click on a span and you get a sag-tension report. Clearances, loading trees and many other functions are just as easily accessed.

PLS-CADD supports both automatic and manual spotting. With manual spotting you use the mouse to add, delete, edit or move a structure. In automatic spotting the program spots structures for you to obtain the lowest cost design possible subject to your constraints. Automatic spotting often results in designs as much as 10% lower in cost than human generated designs. PLS-CADD gives you the best of both the automatic and the manual spotting worlds: cost and time savings while still maintaining control.

Advanced Sag-Tension

IEEE Std. 738 Static Rating Graph, Click here for information on real-time rating

PLS-CADD has built in sag-tension routines. You can quickly display your line in 3-d for any weather condition complete with insulator swings and wire blowout. Clearances from wires to ground or between phases can also be calculated under any weather conditions. Loading trees, stringing charts, galloping ellipses, IEEE Std. 738 and Cigre Brochure 207 thermal ratings, and offset clipping results are all easily accessed.

PLS-CADD goes beyond ordinary sag-tension programs. Running ACSR conductors at high temperature can cause the aluminum strands to go into compression. Most sag-tension programs do not model this effect and thus underestimate the sags. PLS-CADD can model your line both with and without the compression effect so you can see how severe it is.

Like most line design programs, PLS-CADD uses ruling span approximations in its sag-tension calculations. Unlike these other programs, PLS-CADD can work together with our SAPS multi-span finite element sag-tension program when the ruling span isn't appropriate. When used in this manner PLS-CADD bypasses its built in sag-tension routine and uses SAPS instead. This allows modeling of broken conductors, unbalanced ice, marker balls, and flexible structure scenarios that are incompatible with ruling span approximations. It also allows fixing the length of wire in each span to see the impact of moving structures, inserting structures or cutting out wire in an existing line.

Structure Modeling


PLS-CADD Finite Element Structure Check

 When you model structures using one of our structure programs you can show a color coded picture of the structure where the color indicates the percent of available member capacity utilized.

Click here for full image Click here for full image PLS-CADD provides several methods for modeling structures. The simplest is the wind & weight span method for which you need only enter values of allowable wind & weight spans, allowable suspension insulator swing angles and the coordinates of the wire attachment points. A far more powerful method of modeling structures is available when using our structure programs. These programs construct a finite element model from some basic input quantities such as pole height, pole class, cross-arm size and guy placement. When such a structure is checked PLS-CADD not only tells you if the structure is adequate but it also displays a color-coded picture showing which parts of the structure are most highly stressed. You have complete flexibility in changing tensions, conductors and loading agendas and can see the results of these changes on structure usage in seconds. Guyed structures, frames and even lattice towers are all easily accommodated. This method is ideal for upgrade studies of existing lines and is far more powerful and accurate than any other alternative.

Material Subsystem

PLS-CADD features a powerful material subsystem for cost estimation and material list generation. Parts data such as stock-number, part description, cost and custom user defined columns can be entered directly into PLS-CADD. Next, assemblies can be created from parts and/or other assemblies. Alternatively, PLS-CADD can extract parts information from an existing company database. All ODBC compliant databases such as Oracle, Access and DB2 are supported and PLS-CADD is easily configured to access existing database schemas.

Parts and assemblies are tied to structures enabling PLS-CADD to estimate the cost of structures or your entire line. A number of different material and staking list reports are available and can be easily exported to spreadsheets or ODBC databases for use in asset management or work order systems.



 PLS-CADD Plan & Profile Sheet With Page Border, Plan Overlay, Logo and Aerial Photo

 This image shows a PLS-CADD plan & profile sheet featuring the following attachments:

 - PLANBCH.DXF: A DXF plan view drawing containing the tree lines, edges of roads, road names;

 - PAGEPLS.DXF: A DXF drawing of the page border and title block to be included on each sheet;

 - SOUTH.BMP: The aerial photo bitmap;

 - POWER.BMP: The Power Line Systems, Inc. logo bitmap shown on each page.

Click here for full image PLS-CADD totally automates plan & profile sheet drafting. Your plan & profile sheets are updated real-time as you make changes to your design. With a few keystrokes these sheets can be plotted to a Windows compatible printer/plotter or they can be imported into your CAD system. Planimetric drawings, aerial photographs, custom drawing borders, title blocks and company logos are all automatically integrated into these drawings. Once again, PLS-CADD adapts to your standards giving you full control over page size, page layout, text size, scales and many other sheet parameters. Customers typically report that PLS-CADD reduces their drafting time by over 95%.


PLS-CADD addresses the reality that terrain modeling, engineering, spotting, and drafting are not disjoint processes but are all interrelated. By integrating all these functions into a single environment PLS-CADD streamlines the design process. The result is simplicity, flexibility and efficiency not attainable when using a collection of programs from different vendors. PLS-CADD’s engineering features are unsurpassed giving you the state-of-the-art in sag-tension, structural analysis and automatic spotting. From distribution wood poles all the way to 500 kV or higher guyed frames and lattice towers, PLS-CADD has the power and flexibility to do it all. Proven in over 1000 organizations in more than 115 countries, PLS-CADD is the worldwide standard in line design.

PLS-CADD (Power Line Systems - Computer Aided Design and Drafting) is the most powerful package for the structural and geometrical design of overhead power lines. From route selection all the way to the automatic production of reports, material lists and plan and profile sheets, PLS-CADD provides the most complete set of analysis and design functions available anywhere.

Summary of features:

A Microsoft Windows XP, Vista, 7 or 8 (32 bit or x64) environment that lets you:

- Run on powerful yet inexpensive computers;

- Use the most common graphical user interface (GUI) in the world;

- Print reports and plot drawings directly on a wide variety of printers and plotters;

- Run the user interface in English, French or Spanish;

A 3-dimensional terrain model (including automatic TIN triangulation) that lets you:

- Select your route by clicking the mouse on line angle points;

- Move structures in the plan or profile views;

- Automatically generate centerline or side profiles;

- Identify any terrain or obstacle with a unique feature code and symbol;

- Automatically draw the required vertical clearance line for any specified voltage;

- Render terrain in color by elevation and light incidence;

- Import terrain data from GPS, photogrammetry or total station surveying equipment.

A simple system for strength and clearance design criteria that lets you specify:

- Weather cases with individual wind, ice, temperature, and reliability adjustments;

- Load factors for checking the strength of the structures;

- Cable conditions (Initial, after Creep or after Heavy load);

A 3-dimensional model of the line that lets you:

- Represent all structures with all attached cables and insulators;

- Select structures and cables from user editable libraries;

- Spot structures interactively or automatically (global cost optimization);

- String and sag the line interactively or automatically;

- Perform any sag and tension calculation, including the effect of creep;

- Select various conductor models to better represent behavior at high temperature;

- Determine complete design loading trees;

- Compute vertical or lateral clearances from ground or obstacles to any cable;

- Check structure strength by allowable wind and weight spans methods;

- Check structure strength by direct link to structural analysis programs;

- Check clearances between conductors and structures (including guy wires);

- Visualize the line in 3-d with actual wind blowout and insulator swings.

A graphics system that lets you:

- Generate plan & profile sheets automatically;

- Control drawing scales and page layout;

- Plot directly or send drawings to commercial CAD system;

- Export plan & profile sheets to PDF (requires Adobe Acrobat);

- Superpose aerial photographs or maps on your plan view;

- Digitize scanned plan & profile drawings.

A material management system that lets you:

- Import parts, assemblies and labor units from existing databases;

- Automatically generate structure costs for optimization;

- Automatically generate material lists for construction;

Note: the Standard Edition of PLS-CADD includes PLS-CADD/LITE as well as everything in the Survey edition.



 PLS-CADD Rendered Digital Terrain Model

 This image shows lattice towers modeled with our TOWER software as spotted and strung within PLS-CADD. The PLS-CADD model features orthorectified photographs draped over a digital terrain model.



PLS-CADD Digitizing Interface:

 PLS-CADD allows you to superpose DXF drawings and bitmaps in the profile view. The right half of the image above shows a scanned plan & profile sheet bitmap. The left half of the image shows the PLS-CADD profile model in color superposed over the scanned bitmap.

 Displaying a drawing or bitmap in the profile view is as simple as specifying the name of the drawing or bitmap and then calibrating it by clicking on a few points and specifying their stations and elevations.

 Digitizing points is then done using the Add PFL point command by selecting what kind of point to add (Terrain point in the image above) and clicking where you want to add the point. Any points you add are immediately superposed over the image.

 Structures can be automatically added to coincide with digitized attachment points or can be placed using the normal structure editing commands.

 Once sections are strung they are sagged to match those of the scanned drawing using the mouse to drag the curve up or down until it coincides with the drawing.

These are just a few of the surveyors who are familiar with PLS-CADD:

1. LiDAR:

- Aerial Cartographics of America;

- Aerotec;

- Airborne Laser Solutions;

- Ayres Associates;

- FLI-MAP (John Chance Land Surveys);

- Interra;

- Network Mapping;

- Opten Ltd;

- Terra Remote Sensing;

- Terrapoint Aerial Services;

- Tuck Mapping Solutions;

- WIRE Services.

2. Photogrammetry:

- Aerial Cartographics of America;

- Ayres Associates;

- ETG;

- Tuck Mapping Solutions.

Источник информации: Power Line Systems
Размещено: 01.01.2012