System
In certain situations, e.g. when supplying remote areas or islands, a wide area synchronous grid is not feasible at all. Also, some industrial plants generate the electrical energy they need themselves and only draw power from the grid in the event of a fault.
In this experiment, an off-grid system consisting of a synchronous generator and a transmission line model is investigated under different types of load. The stand-alone system is not connected to other power sources.
Resistive, inductive and capacitive loads are used as consumers. The most common case of a mixed resistive-inductive load is studied separately, with and without parallel compensation.
Learning objectives
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Behaviour of a generator-fed off grid system
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Influence of the generator voltage control
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Analysis of the system with resistive, inductive, and capacitive load and combinations of R, L and C
The student should learn to understand the behaviour of a generator and of transmission lines through measurement and evaluation.
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
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Influence of the generator voltage control
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Investigation of the voltage levels before and after the transmission line in dependency of the load
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Investigation of the reactive power output as a function of the load
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Reactive power compensation
- Characteristics of transmission lines under load
| 1 | 773 307 | Synchronous machine VP, 1.0  |
| 1 | 745 51 | Transmission Line Model 380 kV |
| 1 | 745 021 4 | Excitation voltage controller 200 V/2.5 A |
| 1 | 773 2901 | Machine Test CASSY 1.0 |
| 1 | 773 2990 | Electrical dynamometer, 1.0 |
| 1 | 773 361 | Controllable resistive load, 1.0 |
| 1 | 773 362 | Controllable capacitive load, 0.3 |
| 1 | 773 364 | Controllable inductive load |
Alternative:
(not included in the total price) | 1 | 733 11 4 | Capacitive load 1.0 |
Manuals: | 1 | 775 380DE | LIT-print: Generator-Fed Transmission system with RLC-Load, German |
| 1 | 775 380EN | LIT-print: Generator-Fed Transmission system with RLC-Load |
Measuring instruments, with digital measurement CASSY: | 1 | 727 111 | Power Analyser CASSY Plus |
| 1 | 524 222 | * CASSY Lab 2 for Drives and Power Systems |
Power supply: | 1 | 726 75 8 | Three-phase terminal unit with RCD |
| 1 | 773 115 | Machine base bench, 120 cm |
| 1 | 773 258 4 | Coupling / shaft end guard, 1.0, transparent |
| 1 | 315 40 8 | Weight, 2 kg |
| 1 | 732 56 4 | Coupling, 1.0 |
| 1 | 726 256 8 | Panel frame VT160, three-level |
| 2 | 500 59 8 | Safety bridging plugs, black, set of 10 |
| 1 | 500 594 | 4 mm branching bridging plug, blue, set of 10 |
| 1 | 500 641 8 | Safety experiment cable, 100 cm, red |
| 4 | 500 642 4 | Safety experiment cable, 100 cm, blue |
| 1 | 500 647 4 | Safety connection lead 100 cm brown |
| 8 | 500 644 8 | Safety experiment cable, 100 cm, black |
| 5 | 500 6481 4 | Safety connection lead 100 cm grey |
| 3 | 500 624 4 | Safety experiment cable, 50 cm, black |
| 4 | 500 627 8 | Safety Connection Lead 50 cm brown |
| 4 | 500 621 4 | Safety experiment cable, 50 cm, red |
| 5 | 500 622 4 | Safety experiment cable, 50 cm, blue |
| 3 | 500 6281 4 | Safety lead 50 cm grey |
| 5 | 500 602 4 | Safety experiment cable, 10 cm, blue |
| 2 | 500 640 4 | Safety connecting lead, 100 cm, yellow/green |
Additionally recommended:
PC with Windows 7/8/10
Articles marked with * are not essential, we do however recommend them to carry out the experiment.
