Hamk University

Visited Hamk Univirsity in Finland.

Automation Lab

The Vietnamese student in Hamk University.

EMVITET Project

LHU join EMVITET Project.

Education 4.0

Organize Minirobocon Contest 2019 for Binh Phuoc province, Viet Nam

Solar Farm in Vietnam

The total installed capacity in Buon Ma Thuot solar farm is 30.7MW

Sunday, April 26, 2020

Embedded photovoltaic monitoring device, system and method

An embedded PV monitoring device comprises a data receiving unit, a processing unit, a simulating unit and an evaluating unit. An embedded PV monitor system comprises a PV unit, a sensing unit and an embedded PV monitoring device. An embedded PV monitor method mainly utilizes the monitoring device to receive voltage and current parameters of the PV module and an environment working parameter. An output current and an output power of the PV module can be actually calculated, while the output current and the output power of the PV module can be simulated and estimated according to the voltage parameter and the environment working parameter. Thus, the field test monitoring and evaluating on the PV module can be automatically performed and a warning message can be timely outputted. This is advantageous to the detection of the yield of the PV module and the increase of the production quality.



link:
https://patentimages.storage.googleapis.com/17/fa/9a/a3bcab63d23fe5/US20170149380A1.pdf

Saturday, April 25, 2020

Video meeting online tools

There are many support tools for distance learning. In this article, the author introduces some tools for online meetings.
1. Zoom 
Zoom is the digital tool based video communications, with an easy, reliable cloud platform for video and audio conferencing, collaboration, chat, and webinars across mobile devices, desktops, telephones, and room systems. Zoom has a security issue but I think zoom is going to solve this issue.
Fig1. Online meeting with Zoom software
link:
 https://zoom.us/
2. Webex

Cisco Webex is a solution for video conferencing, online meetings, screen share, and webinars. 
3. Skype Meeting
Skype Meeting is a free conference meetings with up to 50 people powered by Skype. No sign ups or downloads required, simply generate your unique link and share it with all.
4. Google meet
 Google meet has developed by Google. This tool not only makes a video meeting but also share your video, desktop, and presentation with teammates.
link:
https://meet.google.com/

In addition, to understand I  made a small comparison of the three  online meeting software shown in the table below:


The Viet Nam policy tariff, either selling the total electricity generated or consuming of Photovoltaic project


The development policy of the photovoltaic power plant of government strongly impacts to NPV and LCOE. According to the policy tariff, either selling the total electricity generated or consuming (FiT). The values in different countries with a FiT rate is shown in Table 2, as well as the years supported. From Table 1, the country has the best FiT rate in Japan (0.297 USD/kWh) and the worst FIT rate in the UK (0.052 USD/kWh). However, the simulation tool is playing an essential role in the economic analysis of the renewable energy system.

Table 2. The policy Fit rate of different countries

Reference
Country
FIT rate
 [USD/kWh]
Years Supported 
[years]
[1]


UK
0.052
20
China
0.059
20
Denmark
0.086
1-10
0.058
10-20
Germany
0.131
20
Italy
0.182
20
Malaysia
0.185
25
Thailand
0.21
25
France
0.263
20
Japan
0.297
21
        [2]
Vietnam
0.0985
25

In April 2020, the Vietnamese government issued a new policy for solar power projects as shown in Table 2. According to Table 2, the FIT rate of electricity for rooftop solar power projects is the highest. This indicates that the government is further rooftop solar power projects. Next are floating projects.

Table 2. The FIT rate of the PV project in Vietnam (@4/2020)[3]

PV system
FIT rate [Cent US/kWh]
Rooftop
8.38
PV Farm
7.09
Floating PV Farm
7.69
Reference:
1. Tantisattayakul, Thanapol, and Premrudee Kanchanapiya.: Financial measures for promoting residential rooftop photovoltaics under a feed-in tariff framework in Thailand. Energy Policy, 109, pp.260-269 (2017).
2. Nguyen Xuan Phuc: Decision No. 11/2017/QD-TTg dated April 11th 2017 on Mechanism for solar power development in Vietnam
3. Nguyen Xuan Phuc: Decision No. 13/2020/QD-TTg dated April 6th 2020 on Mechanism for solar power development in Vietnam

Friday, April 24, 2020

Embedded photovoltaic monitoring device, system and method

An embedded PV monitoring device comprises a data receiving unit, a processing unit, a simulating unit and an evaluating unit. An embedded PV monitor system comprises a PV unit, a sensing unit and an embedded PV monitoring device. An embedded PV monitor method mainly utilizes the monitoring device to receive voltage and current parameters of the PV module and an environment working parameter. An output current and an output power of the PV module can be actually calculated, while the output current and the output power of the PV module can be simulated and estimated according to the voltage parameter and the environment working parameter. Thus, the field test monitoring and evaluating on the PV module can be automatically performed and a warning message can be timely outputted. This is advantageous to the detection of the yield of the PV module and the increase of the production quality.
link:
https://patentimages.storage.googleapis.com/17/fa/9a/a3bcab63d23fe5/US20170149380A1.pdf

A wireless visualization monitoring, evaluation system for commercial photovoltaic modules solely in MATLAB/Simulink environment

This paper proposes a wireless photovoltaic (PV) visualization monitoring, evaluation, and fault detection system based on the STM32F4DISCOVERY board with Bluetooth data transmission in the MATLAB/Simulink platform. All of the irradiance, the cell temperature, voltage, and current of PV devices are acquired through the microcontroller-based DAQ board. These measurements data are transferred to a host computer by both Bluetooth slave module and Bluetooth master one built in a laptop. These measurement data are visually displayed in the form of dashboard in the MATLAB/Simulink environment and are simultaneously input to PV model for theoretical simulation. The functions of evaluation and fault detection for PV modules under practical working conditions are conducted and displayed at the same software platform.
The proposed system has been proved with sufficient accuracy and confidence in the functions of visualization monitoring, evaluation, and fault detection. As compared with the well-developed ones, the proposed system has the advantages such as: reduce both cable and hardware configuration and integrate the all visualization monitoring, evaluation, and fault detection solely in the MATLAB/Simulink environment.
Keywords
PV monitoring, evaluation, fault detection system
STM32F4DISCOVERY board
MATLAB/Simulink
Wireless DAQ system.
link:

Self-sufficient energy recycling of light emitter diode/thermoelectric generator module for its active-cooling application

This paper presents the energy recycling and self-sufficient application of a novel high-power light emitting diode integrating with a thermoelectric generator module. The proposed lighting module in which a thermoelectric generator device is sandwiched between light emitting diode device and heat sink autonomously recycles the waste heat to self-sufficiently support for its active cooling with an electrical fan. The start-up responses of illuminance, temperature, current and power for the proposed module were evaluated through experimental measurement. The corresponding mathematical model was derived and simulation model was built using MATLAB/Simulink for verification. The illuminance, electrical, and thermal performances have a close agreement between experiment and simulation results. The technological viability about both autonomous operation and self-sufficient energy recycling for the novel module with the active cooling was validated. Compared with passive-cooling devices, the proposed module declines the working temperature and improves illuminance simultaneously.
link:
https://www.sciencedirect.com/science/article/pii/S0196890416302151

Report of REN21 based Renewable Energy

REN21 (Renewable Energy Policy Network for the 21st Century) is a think tank and a multi-stakeholder governance group which is focused on renewable energy policy. The full report based renewable energy policy of each country as below:
Full report:
2019 https://www.ren21.net/wp-content/uploads/2019/05/gsr_2019_full_report_en.pdf
2018 https://www.ren21.net/wp-content/uploads/2019/08/Full-Report-2018.pdf
2017 https://www.ren21.net/wp-content/uploads/2019/05/GSR2017_Full-Report_English.pdf

Active model for online activities

Students have a habit of completing assignments online instead of watching lectures and/or reading document. One of the solutions is to encourage students to complete lessons is to embed quiz scattered in videos or documents. In addition, from practical study at Lac Hong University proposed an active online model for teaching online as shown in Figure 1.
Accordingly  active model for online activities, the teachers need to bring up topics in the real world, build opportunities for cooperation and create feedback opportunities in a virtual environment for learners to respond to topics. However, in order to accomplish the activity, teachers need to build activities for learners through video, documents and / or websites. Practical activities in distance learning mode are very different from the bleded training mode. In order to implement hands-on activities, teachers need to build research topics based on online topics such as simulating  and synthesizing materials from which to write feedback on learners' practice  activities