NTC-10.67 “Distribution networks in electric supply systems with MPMS”

Br0.00

The training laboratory system allows to explore the model of a power line loaded with an active inductive load with the ability to connect compensating capacitors.

Category: Power supply, electric power industry

The laboratory stand is designed for carrying out laboratory works in universities and secondary technical educational establishments for the study of “Power Supply of Industrial Enterprises”, “Electrical systems and networks”, etc. The object of study is the model of transmission line set on an active-inductive load with a possibility of adding balancing connectors.

Structurally the stand consists of a body in which part of electric equipment, microprocessor measuring system, front panel and desktop of integrated table are mounted.

The body of the stand contains:

step-down transformers;
load resistor block;
capacitor unit;
throttles;
power autotransformer based on OCM1-0.1;
microprocessor measuring system module.

The module of microprocessor measuring system allows multi-channel measurements in all three phases with the display of current and voltage measured values on digital indicators. The complex of measured parameters is sufficient for the effective study of processes in electricity systems without connecting the stand to computer.

Connecting computer to the stand (USB) and using the supplied software allows displaying current and voltage oscillograms in each of the three phases in both static and transitory processes. This activity helps to raise significantly the quality of knowledge received in the process of doing the laboratory work.

The front panel shows electrical circuits of objects under study. All the circuits shown on the panel are divided into groups according to the subject-matter of works. Patchholes, digital devices indicators, switching equipment and controls allowing to alter operating parameters are mounted on the panel.

The controls on the front panel of the stand include:

the switch of the load unit, allowing to set various operation modes of the three phase circuit;
capacitance box toggle switches which allow to alter capacity between 0,47÷7,47 uF with a 1 0,47 uF step;
wrench switches for selecting harmonics filter, line and step-down transformer voltages.

Software and user’s manual are supplied with the laboratory stand:

software for testing students’ knowledge before conducting the works. Both theoretical knowledge and understanding contents of the laboratory work are tested. Each student’s knowledge level id graded.
a complete set of methodical and technical documents for teaching staff.

Experiments provided

Measurement of electric energy quality using a personal computer.
Determination of voltage fluctuation effect on power consumed by load.
Counterload voltage control.
Voltage control by reactive shunt compensation using capacitor bank.
Voltage control by series reactive compensation using capacitor bank.
Reduction of higher harmonics generation by the substitution of half-wave rectifier for full-wave rectifier in direct current load power circuit.
Higher harmonics compensation with the use of filter compensating device.
Measurement of transformer steady state parameters.
Measurement of power line steady state parameters.
Measurement of open-circuit power distribution network steady state parameters.
Effect of reactive power compensation with the use of capacitor bank on open-circuit power distribution network steady state parameters.

Technical specifications

Power supply:		3~380V/220V, 50Hz
Power consumption, Watt		300
Stand overall dimensions:
	Width, mm	1310
	Height, mm	1460
	Depth, mm	600
Weight, kg		80
Desktop version overall dimensions:
	Width, mm	1310
	Height, mm	680
	Depth, mm	600
Weight, kg		60

Technical characteristics of MPMS

Number of galvanically isolated ADC		4 pcs.
Number of channels in one ADC		3 pcs.
ADC sampling rate		2 kHz
Measured voltage range
	from	±0.1V
	up to	±750V
Measured currents range
	from	±500μA
	up to	±10A
Measurements accuracy, to		0.5%

Scope of delivery

training laboratory system – 1 pc.;
CD with supplemental documentation – 1 pc.;.
passport – 1 pc.;
set of jumpers – 1 pc.

Necessary additional equipment

PC or laptop