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| 1 | Over Voltage Fault due to Disconnection of Consumer’s Transformer Neutral Wire显示文摘Practically,the load currents in three phases are asymmetric in the power system.It means that the impedances are different in all three phases.If the consumer’s transformer neutral cut off and/or was disconnected from the neutral of power supply source,then there will be some trouble and failure occurred.The current in the neutral wire drops down to zero when the neutral wire is cut off and the phase currents of all three-phase equal to each other since there was no return wire.The currents are equal but the voltages at the phase consumers are different.Especially for residential single-phase consumers,the voltage at the consumers of the phase varies differently for three phase systems when the neutral wire was disconnected at consumer side and even the voltage at the consumers one or two of those three phases becomes over nominal voltage or reaches nearly line voltage.In this case,the electronic appliances in that phase will be fed by high voltage than the rated value and they can be broken down.In the power system of UB(Ulaanbaatar)city,there are some occasional such kind of failures every year.Obviously,many electronic appliances were broken down due to high voltage and the electricity utility companies respond for service charge of damaged parts. | Erdene Adiyasuren Enkh-Od Erdene Sergelen Byambaa Shagdarsuren Gantumur | 2023 | Journal of Energy and Power Engineering2023，17，1： | 0 |
| 2 | Solution for Smart Hybrid System of Electricity and Heat Generation for the Farms in Mongolia显示文摘In Mongolia,the numbers of herders who own more than 1,000 herds have been increasing year by year.Some of the herder families are operating small agricultural factories as well.The appropriate power supply systems are not being developed yet in their farms.At the farms,mostly 4-10 herder families work together and the monthly power consumption of one farm reaches to 11.8-14.9 kWh.Currently,the gasoline,diesel,solar and wind power are being used as a source of energy production.In addition,the small-scale CHP(Combined Heat and Power)system is not introduced to the farms for their sustainable operation.There are abundant biomass resources in the rural area of Mongolia.In this paper,we conduct experimental studies on biomass gasification system and suggest small-scale CHP system for rural farms in Mongolia. | Erdene Adiyasuren Tsutomu Dei Sergelen Byambaa | 2021 | Journal of Energy and Power Engineering2021，15，2： | 0 |
| 3 | Some Explanation on Vector Diagram for Power System Analysis显示文摘The generating currents in the generator and the dissipating current at the load are completely different and they are out of phase.The magnitude of those currents is equal and the direction is opposite to each other.The resistive,inductive and capacitive loads dissipate completely different voltages which concern each of character of these loads.The direction of vectors of generated voltage and dissipated voltage must be drawn opposite to each other in the vector diagram.The vector of consumed voltage at the resistive load and the vector of the current through this load are in phase while the vector of generated voltage of the main source is out of phase.The resistive load consumes the voltage which is generated by the main source.The inductive load consumes the voltage which is induced or generated in the inductor caused by the inductance due to the current flow through the network.The vectors of consumed voltage at the inductive load and the vector of current through this load are in phase while the vector of generated voltage in the inductor caused by the inductance is out of phase.The capacitive load consumes the voltage which is generated at the capacitor caused by the capacitance due to the current flow through the network.The vector of consumed voltage at the capacitive load and the vectors of current through this load are in phase while the vector of generated voltage at the capacitor caused by the capacitance is out of phase. | Erdene Adiyasuren Enkh-Od Erdene | 2022 | Journal of Energy and Power Engineering2022，16，1： | 0 |
| 4 | Study on Micro-cogeneration System with Biomass Briquette in Mongolia显示文摘In Mongolia,approx.200,000 herder families are breeding the livestock for their livings.Nearly half of them are not able to use the energy in proper or sustainable manner yet.Both the herd population and number of domestic animals reach 70.0 million in Mongolia.It is assumed that the power demand for a typical herder family is around 10 to 20 kWh/day.In addition,there is a demand of heat for the herder families,especially in winter season.The herder family moves around for the fresh grass for their livestock.Therefore,they need to have a portable power supply source.There is an abundant biomass resource in their living circumstances.The 2.0 kW portable biomass micro-cogeneration systems were designed to supply electricity and heat to herder family.The residue of the biomass in the steppe emits greenhouse gas(GHG)indeed.It is necessary to use biomass as an energy source,especially for electricity to reduce emitting of the GHG. | Erdene Adiyasuren Tsutomu Dei | 2020 | Journal of Energy and Power Engineering2020，14，2： | 0 |
| 5 | Study on Seasonal Adjustment of Solar PV Tilt Angle around the North of 45th Parallel显示文摘The tilt angle of the small scale existing solar power plants is 60 degree and it is 45 degree for the megawatts(MW)class solar power plant in Mongolia.However,the PV module which is installed with 45 degree accumulates lots of snow during the winter.Currently,all solar PV systems installed in Mongolia are fixed the direction and tilt angles.According to the previous research result,the tilt angle of those systems was not suitable for using especially in the winter.The PV module which is installed with 60 degree does not accumulates snow even during the autumn and spring.According to the National Aeronautics and Space Administration(NASA)solar radiation database,solar irradiance for equator facing is largest at 32-degree tilted angle during the summer,47-degree during the spring and autumn,at 62-degree during the winter.The results of this paper show,the tilt angle of the PV module should be adjusted at least twice a year.For instance,the tilt angle will be adjusted at the 32-degree from 15th March to 24th August,at the 62-degree from 25th August to 15th March.In this case,the annual total energy output will be increased up to 30%than present production. | Erdene Adiyasuren Tsutomu Dei | 2019 | Journal of Energy and Power Engineering2019，13，7： | 0 |
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