Dynamic Impact Analysis of Integrating a 6 MW Solar Photovoltaic Power Plant into Medium Voltage Distribution Network

In this paper, the impact of integrating a 6MW solar PV plant installed in Zaouiet Kounta (Wilaya Adrar), in southwest Algeria into a medium voltage network during transient conditions is analyzed. This network is fed by two sources, either a grid source or a conventional power plant if a grid source is not available. Three different transient circumstances are considered in this analysis. The impact on voltage and frequency at the network’s main busbar as well as generator rotor angle is investigated. The analysis is carried out on the network by using ETAP software. The analysis results showed that the integration of this PV plant has an adverse effect on network performance during transient conditions when a Conventional power plant is used to feed network. Moreover, it has a slight effect on main busbar voltage when a grid source is used to feed network.

Evaluasi Kinerja PLTS 1000 Wp di Itenas Bandung

ABSTRAKPembangkit Listrik Tenaga Surya (PLTS) merupakan salah satu sistem pembangkit non-konvensional yang dapat menggantikan peran pembangkit listrik konvensional. Saat ini Institut Teknologi Nasional Bandung (Itenas) sedang mengembangkan instalasi PLTS 1000 Wp jenis grid connected system, menggunakan modul fotovoltaik (FV) tipe monokristalin. Dalam artikel ini, hasil evaluasi berbagai parameter utama modul FV akan dipaparkan dalam rangka mendapatkan kinerja dari PLTS. Pengukuran parameter utama modul FV dilakukan dengan menggunakan mikrokontroler Arduino Mega 1.8.2 meliputi radiasi matahari (G) dan temperatur lingkungan (Ta), sebagai parameter masukan serta tegangan (V), arus (I) dan temperatur sel/modul FV (Tc), sebagai parameter keluaran. Pengukuran parameter utama bertujuan untuk memperoleh daya (P), efisiensi (η) serta energi kumulatif (Ek) dari PLTS terpasang. Dari hasil pengujian selama 6 hari, diperoleh daya, efisiensi, dan produksi energi kumulatif rata-rata harian PLTS terpasang adalah 535,99 W/hari, 14,29 % dan 2,64 kWh.Kata kunci: fotovoltaik, monokristalin, daya dan efisiensi rata-rata harian ABSTRACTThe solar power plant (SPP) is one of non convensional power plant, which can be used to substitute the conventional power plant. Presently, Institut Teknologi Nasional (Itenas) has been developed a 1000 Wp grid-connected SPP, using monocrystalline photovoltaic (PV) modules. In this paper, evaluation results of the PV modules parameters will be elaborated to figure out the PV modules characteristics, as a basic to evaluate the SPP performance. The measuring of PV modules have been done using arduino mega 1.8.2 microcontroller. The input parameters of the PV modules are solar radiation (G) and ambient temperature (Ta), meanwhile the output parameters are voltage (V), current (I) and cell/module temperature (Tc). All these parameters are used to estimate the power (P), efficiency (η) and cumulative energy (E). Based on measurements and evaluation during 6 days, it is found that the average of the power and efficiency of the SPP were 535,99 W/day and 14,29 %, respectively, and average yield of energy (daily) was 2,64 kWh .Keywords: photovoltaic, monocrystalline, daily power and efficiency average

Integration adsorption chillers with conventional power plant

According to predictions, electricity consumption in developed countries will increase three times by 2020 compared with 1970. In contrast, in developing countries, where the population may double by 2020 relative to 1970, there may even be a twentyfold increase in electricity consumption [1]. Other sources predict that increases in electricity demand by 2030 will be approx. 2 ÷ 3% a year. With such a high rate of development of the world economy, the electricity demand will be increasing. Thus, using only renewable sources to satisfy the demand for energy is insufficient and will remain so in the near future. Coal will remain the predominant fuel used to produce electricity. One of the ways to reduce the adverse effect of fossil fuels on the natural environment is to increase the efficiency of use of primary energy. Electricity production is associated with large losses, including in the form of heat which can be used to produce cold with adsorption chillers that can be powered by low-temperature heat. The paper presents the possibility to employ adsorption chillers in power units in order to increase the efficiency of electricity production. Simulation calculations were performed using Sim tech’s IPSEPro software.

Possibility of use adsorption chillers for increase efficiency in conventional power plant

Long-term forecasts indicate that the annual increases in electricity demand by 2030 will be approx. 2 ÷ 3% a year. At present, 40% of the world's electricity is produced using coal-fired power plants. Forecasts indicate that coal will still be the predominant fuel used to produce electricity and thus any actions aimed at increasing the efficiency of electricity production are purposeful. Enormous amounts of waste heat, which is not sufficiently used, are released during the process of electricity production. One of the ways to manage it is to use refrigeration systems based on adsorption chillers which would use waste heat to generate cold that would be employed for air-conditioning or process purposes. In this paper, the cycle of a conventional coal-fired power plant was modelled and then the possibilities of using waste heat for generation of cold as well as the impact of a chiller on the operation of a power unit were analysed using IPSEpro software.