A newly built power flow program in PSCAD/EMTDC for electric power system studies

Author(s):  
K.W. Louie ◽  
A. Wang ◽  
P. Wilson ◽  
P. Buchanan
Author(s):  
Fadhel Putra Winarta ◽  
Yoli Andi Rozzi

The study of electric power flow analysis (Load Flow) is intended to obtain information about the flow of power or voltage in an electric power system network. This information is needed to evaluate the performance of the power system. Electrical power flow problems include calculating the flow and system voltage at certain terminals or buses. The benefits of this power flow study are to find out the voltage at each node in the system, to find out whether all the equipment meets the specified limits to deliver the desired power, and to obtain the original conditions in the new system planning. This study is divided into two: the analysis of data when the conditions have not been added wind turbine and after the addition of 300 kW wind turbine with software power station ETAP software 12.6.0 and the Newton-Raphson method will be used in analyzing the power flow of the electric power system. Based on the results of the tests, it is found that the overall value of losses for power flow before the addition of DG is 0.031 MW and 0.037 Mvar, for the voltage drop with the lowest percentage, namely on bus 10 with a percentage of 96.45 for the 0.4 kV system and the 20 kV system on bus 19 with a percentage of 99.03, the largest% PF load was in lump 1 with 98.64 and the smallest% PF was in lump7 with a value of 84.92. The short circuit data value on the 20 kV bus system at Andalas University before the addition of DG with 3-phase disturbances averaged 13.354 A, 1-phase disturbances averaged 3.521 A, 2-phase disturbances averaged 11.719 A and 2 ground phases of 12.842 A Whereas for the value of power flow after the addition of DG in the form of the wind turbine of 300 kW the overall value of losses is 0.032 MW and 0.042 MvarAR, for the voltage drop with the percentage for voltage drop with the lowest percentage is bus 10 with a percentage of 96.63 for system 0, 4 kV and a 20 kV system on bus 14 with a percentage of 98.1, the largest% PF load is in lump 1 with 98.64 and the smallest% PF is in lump7 with a value of 84.92. The short circuit data value on the 20 kV bus system at Andalas University after the addition of DG with 3 phase disturbances has an average value of 13.354 A, 1 phase disturbance averages 3.523 A, 2 phase disturbances average 11.737 A and 2 phases ground is 12.059 A For the source in this system, after the addition of DG, there was a change in the% PF of the PLN grid, namely 79.53 and the wind turbine -83%.


JURNAL ELTEK ◽  
2021 ◽  
Vol 19 (2) ◽  
pp. 55
Author(s):  
Rohmanita Duanaputri ◽  
Imron Ridzki ◽  
Egar Rahmat Maulana ◽  
Ayusta Lukita Wardani

  Kestabilan suatu sistem tenaga listrik sendiri merupakan kemampuan sebuah sistem tenaga listrik dalam mempertahankan tegangan, frekuensi, dan daya di setiap bus sistem interkoneksi pada kondisi normal baik sebelum dan sesudah terjadinya gangguan. Sistem akan memasuki keadaan ketidakstabilan ketika terjadi gangguan, peningkatan permintaan beban dan adanya perubahan kondisi sistem, keadaan tersebut akan menyebabkan penurunan performa sistem tenaga listrik. Pada tahun 2015-2019 pulau madura hanya terdapat lima gardu induk, seiring dengan pertambahan kebutuhan tenaga listrik di beberapa wilayah pulau madura, untuk memperbaiki mutu dan keandalan penyaluran tenaga listrik ke konsumen, hal inilah yang mendukung proyek penambahan Gardu Induk Guluk Guluk. Gardu Induk Guluk-Guluk merupakan salah satu bagian dari sub sistem Krian Gresik. Dengan adanya penambahan Gardu Induk Guluk-Guluk tersebut akan berpengaruh terhadap aliran daya dan tegangan pada sistem tenaga listrik. Analisis dilakukan pada kondisi normal sebelum dan setelah adanya Gardu Induk Guluk-Guluk. Kondisi tegangan pada sub sistem Krian Gresik saat sebelum dan sesudah pembangunan Gardu Induk Guluk-Guluk masih memenuhi standart, namun ada beberapa bus yang mengalami penurunan tegangan dibawah 95%. Gardu Induk yang mengalami penurunan tegangan dibawah 95% sebelum pembangunan Gardu Induk Guluk-Guluk, yaitu pada Gardu Induk Bunduran, Gardu Induk Porong, dan Gardu Induk Maspion. Saat setelah pembangunan Gardu Induk Guluk-Guluk, terdapat penambahan Gardu induk yang mengalami penurunan nilai tegangan, yaitu Gardu Induk Sampang, Gardu Induk Pamekasan, Gardu Induk Guluk-Guluk, dan Gardu Induk Sumenep. Aliran daya terbesar saat terjadi penurunan tegangan adalah pada bus Bus 1 Bunduran. The stability of an electric power system itself is the ability of an electric power system to maintain the voltage, frequency, and power in each interconnecting bus system in normal conditions both before and before the disturbance. The system will enter a state of instability when there is a disturbance, an increase in load demand and a change in system conditions, this situation will cause a decrease in the performance of the electric power system. In 2015-2019 Madura Island there are five substations, along with the increasing need for energy in the Madura Island area, to improve some and control electric power, this is what supports the addition of Guluk-Guluk Substations. Guluk-Guluk Substation is one part of the Krian Gresik sub-system. With the addition of the Guluk-Guluk Substation, it will affect the flow of power and voltage in the electric power system. The analysis was carried out under normal conditions before and after the Guluk-Guluk Substation. The voltage conditions in the Krian Gresik sub-system before and before the construction of the Guluk-Guluk Substation still met the standard, but there were several buses that experienced a voltage drop below 95%. Substations that experienced a voltage drop below 95% before the construction of the Guluk-Guluk Substations, namely the Bunduran Substation, Porong Substation, and Maspion Substation. After the construction of the Guluk-Guluk Substation, there were additional substations that experienced a decrease in voltage values, namely the Sampang Substation, Pamekasan Substation, Guluk-Guluk Substation, and Sumenep Substation. The largest power flow when there is a voltage drop is on the Bus 1 Bunduran.


2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Asdian - ◽  
Lukmanul Hakim ◽  
Endah Komalasari ◽  
Herri Gusmedi

Sistem tenaga listrik merupakan sistem interkoneksi antara pusat pembangkit, transmisi dan beban. Apabila terjadi gangguan pada salah satu sistem karena adanya beban lebih dan ketidakstabilan tegangan, akan berpengaruh ke sistem yang lain, maka perlu ada upaya untuk mencegah terjadinya gangguan tersebut. Salah satunya dengan mengetahui kemampuan pembebanan maksimum setiap beban agar kestabilan sistem dapat tetap terjaga dan dapat meminimalisir terjadinya pemadaman listrik. Penelitian ini bertujuan untuk mengidentifikasi bus-bus beban yang mendekati batas operasi yang diijinkan berdasarkan nilai λ dalam sistem interkoneksi Sumatera Bagian Selatan (Sumbagsel). Simulasi dilakukan dengan menggunakan Predictor - Corrector Method Continuation Power Flow untuk mendapatkan nilai λ dalam sistem tersebut. Dari hasil simulasi yang dilakukan, diperoleh nilai titik operasi dan titik jatuh dalam setiap beban sistem.Kata kunci : kemampuan pembebanan maksimum, bus-bus beban, titik jatuh An electric power system interconnection system is among a plant, transmission and load. In the event of disruption in one system due to overload and voltage instability, will affect other systems, it is necessary to attempt to prevent the occurrence of such disorders, one of them by knowing the maximum loadability of each load for voltage stability and minimalize cut off an electric. This study aimed to identify the load buses are approaching the limit of allowable operations based on the value of λ in the system interconnection South of Sumatera (Sumbagsel). Simulation is done using Predictor - Corrector Method Continuation Power Flow to obtain the value of λ in the system. From the simulation results, the value of the operating point and point load falls within any system. Keywords : maximum loadability, load buses, point load falls 1. PENDAHULUAN Pada saat ini, kebanyakan sistem tenaga listrik sudah merupakan sistem interkoneksi antara satu pusat pembangkit dengan pembangkit lainnya dengan harapan apabila salah satu dari pusat pembangkit atau saluran transmisi mengalami gangguan maka pasokan tenaga listrik tetap dapat berjalan. Di sisi lain, interkoneksi sistem tenaga listrik juga mempunyai beberapa kelemahan. Salah satu kelemahannya adalah apabila terjadi gangguan pada salah satu sistem karena adanya beban lebih dan ketidakstabilan tegangan, akan berpengaruh ke sistem yang lain. Gangguan yang pada awalnya bersifat sementara dan terjadi pada bagian si


2019 ◽  
Vol 2019 (3) ◽  
pp. 169-174
Author(s):  
M Misrikhanov ◽  
◽  
Sh Khamidov

A unified mathematical model of the power flow in a system containing a reactive component compensator consisting of capacitor banks connected in series to a thyristor control reactor is presented. The application of the FACTS (Flexible Alternative Current Transmission System - Controlled flexible DC power transmission) technology is shown to reduce the gap between the controlled and unmanaged modes of operation of the electric power system (EPS), presenting dispatching personnel with additional degrees of freedom in the management of power flows and voltages in excess and deficit areas of the electric network. The main objectives of the FACTS technology application are studied: increasing the transmission line capacity to the thermal limit; optimizing power flows in a complex heterogeneous network; increasing the static and dynamic stability of the electric power system. To assess the action of the new generation of regulators of the power system, two alternative models of power flow in the electric power system are considered. In the first model, the concept of alternating series reactance is used as a state variable. In the second model, the characteristic of the advance angle is used, given in the form of a nonlinear dependence in the problem of calculating the power flow using the Newton-Raphson method. Conclusions are made on the presented models of power flow allowing to estimate possibilities of the serial capacitor with thyristor control TCSC (Thyristor Controlled Series Capacitor), as FACTS device, on improvement of modes of functioning of electric power system.


2021 ◽  
Vol 5 (2) ◽  
pp. 80-87
Author(s):  
Muhammad Ruswandi Djalal ◽  
Makmur Saini ◽  
A.M Shiddiq Yunus

Power flow analysis in an electric power system is an analysis that reveals the performance of an electric power system and the flow of power (active and reactive) for certain conditions when the system is working. The analysis was carried out using the ETAP 16.00 software, the method used was the newton rapshon by taking a case study of normal conditions. From the results of the study, it can be seen that the power flow that occurs in each channel of the 150 kV system in the South Sulawesi system. The amount of active power (MW) that occurs during normal conditions based on the simulation is 1730.87 MW, where the active power is the largest, which is 171 MW from BUS15_TLASA to BUS13_SGMNSA. For the voltage data, there is a slight comparison of the voltage during the simulation compared to the PLN data.


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