System
In order to ensure a nationwide supply of electrical energy, large transmission grids are required in addition to power plants. These grids consist of a large number of lines and transformers as well as electrical substations.
Among the network types, a distinction is made between radial, ring and meshed networks. Extensive calculations are required to determine an optimal grid configuration. But even complicated grid structures can be traced back to a few basic circuits. To understand them, it is therefore important to first familiarise oneself with the basic circuits of power engineering.
With this equipment, series and parallel circuits of transmission lines are examined.
Learning objectives
- Measure the voltage distribution when two lines of different lengths are connected in series.
- Determine the relationship between line length and voltage drop.
- Investigate the influence of operating capacitances on voltages and currents.
- Get to know the behaviour of an island system under different types of load and compare it with the statements made in the theoretical part.
Through measurement and calculation, the learner should understand and determine the behaviour and characteristics of a grid.
Target groups
Pupils in vocational training in power engineering. Training in the field of power plant technology in industry. Students in general electrical engineering and power engineering. Levels up to a bachelor's degree.
Knowledge of three-phase or alternating current technology is a prerequisite.
Topics
- Series connection of two transmission lines
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- Voltage distribution when two lines with different lengths are connected in series
- Relationship between line length and voltage drop
- Influence of operating capacitances on voltages and currents
- Load and voltage drop when two lines are connected in parallel
- Exercises for further elaboration
| 2 | 745 51 | Transmission Line Model 380 kV  |
| 1 | 745 563 | Power circuit breaker |
| 1 | 745 50 8 | Three-Phase Transformer TL380KV |
| 1 | 773 361 | Controllable resistive load, 1.0 |
| 1 | 773 364 | Controllable inductive load |
Manuals: | 1 | 565 141 4 | LIT-print: Parallel and Series Circuits of High-Voltage Lines, German |
| 1 | 565 142 4 | LIT-print: Parallel and Series Circuits of High-Voltage Lines |
Measuring instruments, with digital measurement CASSY: | 1 | 727 111 | Power Analyser CASSY Plus |
| 1 | 524 222 | * CASSY Lab 2 for Drives and Power Systems |
Conventional measuring instruments:
alternativ option to CASSY measuring instruments above
| 3 | 727 32 4 | Moving iron meter, 2.5 A |
| 3 | 727 39 4 | Moving Iron Meter 100/400 V |
Power supply: | 1 | 726 75 8 | Three-phase terminal unit with RCD |
| 1 | 726 256 8 | Panel frame VT160, three-level |
| 6 | 500 59 8 | Safety bridging plugs, black, set of 10 |
| 1 | 500 591 4 | Safety bridging plugs, yellow/green, set of 10 |
| 1 | 500 592 8 | Safety bridging plugs with tap, black, set of 10 |
| 1 | 500 851 4 | Safety experiment cables, 32 A, set of 32 |
| 1 | 500 852 8 | Safety connecting leads, 32 A, yellow/green, set of 10 |
| 4 | 500 641 8 | Safety experiment cable, 100 cm, red |
| 4 | 500 642 4 | Safety experiment cable, 100 cm, blue |
| 2 | 500 647 4 | Safety connection lead 100 cm brown |
| 2 | 500 6481 4 | Safety connection lead 100 cm grey |
Additionally recommended:
PC with Windows 7/8/10
Articles marked with * are not essential, we do however recommend them to carry out the experiment.
