Welcome To Spacetime Consultancy

Harmonics Investigation

5 Days Course

Agenda

Harmonics in Power Systems

a. Review of Power Systems Harmonics Sources

i. Harmonics Causes: Non Linear Loads
ii. Harmonics Voltage Have Forms and Spectrum;
iii. Harmonics Current Have Forms and Spectrum;
iv. Effects of Voltage and Current Distortion:

1. Effects on Power Transformer;
2. Effects on Generators and Motors;
3. Capacitors;
4. Protective Equipment;
5. Measuring Equipment

a. Power Quality Standards
b. Harmonics Investigation:

a. Site Measurement and Data Collection;
b. Selection of Appropriate Tools;
c. Harmonics Indicators;

c. VFDs and Harmonics

Site Data Collection:

Available Short Circuit Contribution;
PCC – Point of Common Coupling;
Electrical Loads and Motors;
Capacitor Banks;
IEEE or IEC Standards;

Harmonics Analysis

Bus Voltage Waveforms, Spectrum and Voltage Total Harmonics Distortion;
Branch Current Waveforms, Spectrum and Current Total Harmonics Distortion;
Voltage Harmonics Indices;
Current Harmonics Indices;
THD Violations

Numerical Examples using

SKM Professional Software;
DesignBase Professional Software;

Generate the model one line diagram;
Input Data: Power Utility, Power Transformer, Feeders/Cables, Induction Motors
IEEE Standards;
IEC Standards;
Harmonics Filter Design:
Site Filter Locations;
Data Collection;
Filter Design.
Harmonics Mitigation

Program Schedule:

8:00 – 12:00 pm Morning Session
12:00 – 13:00 pm Lunch
13:30 – 17:00 pm Course Session

Notes:

After each 50 minutes, break 10 minutes.

In-House Training

We provide cost effective in-house courses, tailored specifically to your organization’s needs. The courses can be arranged at your preferred location and time. If you would like to discuss further details, please contact Spacetime.

About the Author

Professor Silviu Darie, PhD(EE) has more than 40 years’ experience of university level electrical engineering instruction, industry consultancy and training in power system analysis computer application. Large international experience: Romania, South Africa, New Zealand, Saudi Arabia and USA in electrical energy distribution, electrical energy management, demand side management, power quality, transmission pricing, embedded generation as well as computer aided power system analysis and design. From 2005 to 2015 was the Vice President of Consulting and Engineering at Power Analytics Corporation, USA in San Diego. He is a Consultant Professor of Power Systems at Technical University of Cluj Napoca, Romania and University of Cape Town. Dr. Darie has authored or co-authored hundreds of technical books, student manuals, technical papers and research projects. His research area covers the modeling of power system components, power system harmonics, computer aided power system design and analysis, power system distribution optimization, power system protection, industrial installation, project investigation and electro technologies.

Dr. Darie led nearly 210 electrical power projects; he constructed 18 prototypes designed for mass production, holds three patents and is experienced in most leading professional software programs for electrical engineering. He has provided services to clients worldwide.

Mastering Power Faults

Guide and Tools Based on IEEE and IEC Standards

A 5 days Course

Agenda

Reviewing of Power Systems Components Computation Methods and Analysis

a. Review of Power Systems Computation Methods:

i. Per Unit Method;
ii. Symmetrical Components

b. Models and Constants in Power System Analysis:

i. Synchronous Generator Model and Constants;
ii. Power Transformer Model and Constants;
iii. Induction Motor Model and Constants;

a. Models and Constants in Power System Analysis (cont.):

Feeder / Cable Model and Constants;
Overhead Line Model and Constants;
Static Load Model and Constants;

b. Numerical Examples and practical Exercise.

Types of Faults

Balanced 3 Phase Short-circuit;
Unbalanced Current Faults: L-L, L-L-G, L-G;
Terminology in Short Circuit Analysis.

Assessing International Standards on Short Circuit Current Analysis:

IEEE Standards;
IEC Standards;
When and Where to Use IEEE or IEC Standards;

Short Circuit Current Magnitude and Shape.
Tools and Techniques in Short Circuit Analysis:
Professional Power System Software: ETAP, SKM, DesignBase, Easy Power
Practical Short Circuit Current Calculation Using: SKM, DesignBase, Easy Power.

Numerical Examples using:

SKM
DesignBase
Easy Power

Generate the model one line diagram;
Input Data: Power Utility, Power Transformer, Feeders/Cables, Induction Motors
Short Circuit Based on IEEE Standard Calculation;
Short Circuit Based on IEC Standard;
Reports on Short Circuit Current Calculation;
Power System Components Evaluation.

Program Schedule:

8:00 – 12:00 Morning Session
12:00 – 13:00 Lunch;
13:30 – 17:00 Course

Notes:

After each 50 minutes, break 10 minutes.

In-House Training

About the Author

Large international experience: Romania, South Africa, New Zealand, Saudi Arabia and USA in electrical energy distribution, electrical energy management, demand side management, power quality, transmission pricing, embedded generation as well as computer aided power system analysis and design. From 2005 to 2015 was the Vice President of Consulting and Engineering at Power Analytics Corporation, USA in San Diego.

He is a Consultant Professor of Power Systems at Technical University of Cluj Napoca, Romania and University of Cape Town. Dr. Darie has authored or co-authored hundreds of technical books, student manuals, technical papers and research projects. His research area covers the modeling of power system components, power system harmonics, computer aided power system design and analysis, power system distribution optimization, power system protection, industrial installation, project investigation and electro technologies.

Motor Starting Impact To Power Distribution System

3 Days Course

Agenda

Scope of Motor Starting

The impact of starting a motor or a group of motors to the power system supply (motor starting based on power flow);
To provide the motor performances at the motor terminal while starting the motor (dynamic motor starting).
To provide the system performances while stating the motor – motor starting based on Transient System Analysis. This method requires the steady state model plus the dynamic model of the power system. This method is used to calibrate and regulate the generators which supply the system. The method is used in particular for motor sequencing for off shore oil platform.

Available starting methods

Full Voltage
Full Voltage Square with three types of controls. These controls are function of Time, % Motor Voltage, %Motor Speed.
Wye-Delta with three types of controls. This controller switches the motor from star connected to delta connected. These controls are function of Time, % Motor Voltage, %Motor Speed.
Auto-Transformer with three types of controls. This controller modifies the tap setting in up to two steps. These steps are controlled as function of Time, % Motor Voltage, %Motor Speed.
Part Winding with three types of controls. This controller modifies the tap setting in up to five steps. These steps are controlled as function of Time, % Motor Voltage, %Motor Speed.
Series Resistance with three types of controls. This controller reduces the amount of series impedance in up to five steps. These steps are controlled as function of Time, % Motor Voltage, %Motor Speed.
Series Reactance with three types of controls. This controller reduces the amount of series reactance in up to five steps. These steps are controlled as function of Time, % Motor Voltage, %Motor Speed.
Shunt Capacitance with three types of controls. This controller reduces the amount of supplied reactive power in up to five steps. These steps are controlled as function of Time, % Motor Voltage, %Motor Speed.
Solid State Voltage Control with three types of controls. This controller reduces the tap setting in up to five steps. These steps are controlled as function of Time, % Motor Voltage, %Motor Speed.
Solid State Current Limit – this controller set’s the motor’s current limit to the current pu value specified.
Solid State Current Ramp- this controller increases the current gradually from the first value to the end value over the Tramp (Time2 – Time 1).
Solid State Voltage Ramp – this controller increases the voltage gradually from the first value to the end value over the Tramp (Time2 – Time 1).
Solid State Torque Ramp – this controller increases the torque gradually from the first value to the end value over the Tramp (Time2 – Time 1).
Variable Frequency Drive – this controller provides higher starting torque. This means that the motor starting current is higher but the design of the VF is tradeoff between the requirement of high starting torque and motor withstand capability of carrying higher current.

Direct Motor Starting based on Power Flow - the most usual / popular procedure for starting the motors.

The maximum starting current at the instant of starting the motor in the motor feeder;
The maximum voltage drop at all system busses;
The power flow in the system branches while motor starts;
Voltage control during starting the motor.

Dynamic Motor Starting – the procedure to determine the motor performances at the motor terminal while starting the motor.

Motor bus voltage profile;
Motor bus frequency profile;
Motor speed in pu;
Motor current in pu;

Case study examples:

Motor Starting using professional power system software: SKM, DesignBase, Easy Power.

Energy Training

Harmonics Investigation

5 Days Course

Agenda

Program Schedule:

Notes:

In-House Training

About the Author

Mastering Power Faults

A 5 days Course

Agenda

Program Schedule:

Notes:

In-House Training

About the Author

Motor Starting Impact To Power Distribution System

3 Days Course

Agenda

Program Schedule:

Notes:

In-House Training

About the Author