Peteris Apse-Apsitis

Riga Technical University | RTU · Department of Industrial Electronics and Electrical Technologies

The prolongation of the online education period is a significant challenge nowadays in Ukraine. Due to the ongoing war in Ukraine, educational institutions have been destroyed, leading to a significant movement of students both within the country and abroad. Consequently, the quality of educational services has suffered, particularly in technical s...

This article (case study) discusses the influence of household photovoltaic generation on the voltage quality in a three-phase 0.4 kV grid. The research analyzes remotely acquired data from two specially designed three-phase Y-connected power meters to understand the PV system’s influence on the grid. The values of the voltages, currents, THD, indi...

According to standards, the lighting system is one of the key elements to provide safety on city roads, defined by quality parameters. LED technology and movement detection sensor interaction bring about new regulation techniques, creating an energy-efficient smart LED lighting system concept. This paper reveals extensive comparative data analysis...

In this paper, different hardware solutions for proximity sensing are reviewed. The purpose of the review is to find the most accurate sensing method with the option to process raw data and to extend the system beyond one sensor. During the research proximity sensing system, derived from commercially available solutions, have been made. The develop...

In this paper, the parallel plate capacitor is reviewed in the context of human presence. The paper includes the explanation of the capacitance change of a parallel plate capacitor depending on the human proximity and calculation method for a rough estimation of its capacitance. In this paper, some measuring and calculating methods are described, a...

This paper focuses on analysis of clothing appearance and fit. Clothing fit ensures human body comfort in terms of microclimate, movements and the body well-being. Garments produced in serial production developed according sizing chart, which is suited to the individual measurements by indifference intervals only. Some, more elaborated systems use...

In this paper we report a power monitoring system used in the industrial greenhouse. Monitored data is processed in the device and then transferred to secure cloud services, where the data can be further processed, formatted and sent to the server used for data storage and later analysis. The power monitoring system is a part of the project where v...

Industrial greenhouse control systems are changing and getting new capabilities, due to the evolution of the Internet of Things (IoT) technologies, allowing wirelessly integrate various sensor technologies and create a cloud-based database and analytic solutions. Greenhouse systems typically are controlled by consuming single temperature and humidi...

Nowadays the industrial management systems are changing by means of implementing various Internet of Things (IoT) technologies, allowing a simple integration of sensor technologies with wireless communications and development of cloud based database solutions. The industrial greenhouse management systems are not the exception in this regard, as the...

The paper describes the application of supercapacitor energy storage system for induction traction drive test bench that replaces a real electric public transport for performing testing and researches. The suitability and usage of such bench for research purposes is explained and the importance of the development of software mathematical model for...

Power and energy measurement and monitoring is a key factor for many industries in terms of energy and cost efficiency evaluation. Due to trends of Smart Grid concept application in industrial environment, including decentralized DC-Grid implementation, for precise evaluation – faster and low-cost measurement equipment is needed. Manufacturing indu...

This paper presents analysis of automation and heating processes of 120 liters water boiler which is heated up by universal central heating boiler "Dacon — FB 36" which is equipped with experimental automatic briquettes feeding system.

Bidirectional energy flow monitoring near 230 V AC or 600 V DC micro-grid consumers — industrial devices or household consumers — rise questions regarding measurement methods and devices self power consumption, price and precision. Article deals with overall 3×230V+N AC and 600V DC micro-grid bidirectional monitoring system design as well as measur...

Education outcome is very important for practical work in industry, design, research as well for lifelong education and theoretical work. Article deals with some aspects of all-around world discussion on education content, process and education meaning from society point of view.

This paper describes a stationary bench simulating the traction drive of electric transport vehicles in traction, freewheeling and braking modes which is planned to investigate the drive operation with and without a supercapacitor energy storage system. The bench contains two equal coupled AC motors simulating the traction drive of surface electric...

The article gives an overview of various researches dealing with smart or intelligent street lighting systems, and what is meant with this term in different countries. Several available architectures of smart street lighting systems as well as those for future are described and discussed. Further some researches and developments of such systems in...

Remote sensor's installation and data acquisition are rapidly growing technical field. Data sensing in a variety of ways, transmission, collection, storage, analysis and resulting control, alarms, statistics etc. require knowledge in different fields to achieve the best and effective result. Different specialities professionals are involved in all...

This research deals with investigation of different consumer equipment electrical characteristics. Equipment of three different households are measured and analyzed. Further a current sensor technology was chosen and consumption measurement methodology and algorithm were developed. Five consumption measurement devices for local energy monitoring sy...

Electrical and heat energy production expenses are constantly rising nowadays. Energy consumption monitoring allows reducing overall energy consumption by identifying ineffective energy use. The article deals with event based energy consumption monitoring method and system. Event based monitoring simplifies communication between monitoring devices...

To feed sensors on different turning or rotating shafts of electrical motors, like servo, stepper or DC motor shafts, pan/tilt and different robotic system rotating parts, especially where rotations are up to 3600 and more turns of rotation, conventional wire loop cannot be applied. The same problem also lies with data transmission from sensor. The...

Paper gives an overview of the smart grids definitions and smart meter cost benefit analysis in Latvia. Electrical power consumption metering is topical since development of distribution grid. As different smart meters are available on global market, it is necessary to evaluate the possible costs and benefits to justify existing metering system rep...

Practical workshops are one of the key points to achieve good knowledge in engineering. Faculty or campus based workshops allow to practice only several of hours per week or less due to limited workplaces. Limited possibilities set longer time to finish course, especially if the university has divisions in different cities, offering the same learni...

Intelligent LED dimmer demand in lighting market is increasing due to energy saving potential, environment protection as well as great possibility of control and management of lighting systems. An internet web browser controlled LED lighting systems is developed and described in the article. The 1st is radio-wave and internet implementation between...

Creation of good knowledge is based on practical exercise combined with theory learning. Studies in electrical engineering require many different laboratory exercises, traditionally carried out within the premises of university, where students can practice only several hours per week or even less. Such limited possibilities stipulate longer course...

The number of electricity consuming equipment for existing household end-user is continuing to increase, and some residential buildings already consume more energy than existing building regulations prescribe. The uprising SmartGrid technology with alternative energy sources could be a key to solve this problem, but it is demanding also for a “smar...

Railway safety is important task and start with steam locomotive development beginning. Today EU-Artemis Joint Undertaking has placed several activities to achieve improvements in this field. Main goal is to improve safety via embedded ICT. Some problems or difficulties are caused by fact that today one of the oldest mechanical transport industries...

Low cost, mobile field robotic platform positioning to achieve positioning precision less than 0,1% (10 cm) over distance 100 m is described. Main applications for described system are robotized agriculture tasks. Known 0,1% precision systems are to expensive for wide use in agriculture production automation. Described positioning method use compas...

continuous development of office and household equipment has changed the electricity end-consumer profile in latest years, and number of electricity consuming equipment is still increasing. To help households save electrical energy consumption, a new smart monitoring method is needed, which has low cost, can be used in existing installation and giv...

The electricity consuming end-user profile has changed in latest years, due to development of new electrical devices with increased functionality and complexity. Also increasing number of electricity consuming equipment that is available to end-user, makes very hard to identify real electricity consumption of each device. The existing wall plug dig...

due to continuous development of office and household equipment, the electricity end-consumer profile has changed in latest years, and increasing number of electricity consuming equipment, makes very hard to identify real electricity consumption of each device. Long-term power consumption monitoring with existing wall plug digital power meters can...