scholarly journals STUDI KEMAMPUAN PEMBEBANAN MAKSIMUM SISTEM INTERKONEKSI SUMBAGSEL

2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Asdian - ◽  
Lukmanul Hakim ◽  
Endah Komalasari ◽  
Herri Gusmedi
Keyword(s):  
Power System ◽  
Electric Power ◽  
Power Flow ◽  
Point Load ◽  
Electric Power System ◽  
Continuation Power Flow ◽  
Voltage Instability ◽  
System Interconnection ◽  
Simulation Results ◽  
Predictor Corrector

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

scholarly journals STUDI ANALISIS UFR (UNDER FREQUENCY RELAY) PADA GARDU INDUK PESANGGARAN

2019 ◽  
Vol 6 (2) ◽  
pp. 45
Author(s):  
Bhrama Sakti K.P. ◽  
A.A. Gede Maharta Pemayun ◽  
I Gede Dyana Arjana
Keyword(s):  
Power Plant ◽  
Power System ◽  
Electric Power ◽  
Recovery Time ◽  
Electric Power System ◽  
Calculation Results ◽  
Working Principle ◽  
Simulation Results ◽  
System Frequency ◽  
Frequency State

The disruption of the electric power system due to overcurrent causes a trip to the 3rd generator of pesanggaran power plant . This causes a decrease in frequency due to the system losing its supply. Frequency interference can be detected automatically with UFR (Under Frequency Relay). The working principle of UFR is to compare the value of the system frequency and the value of the frequency setting. The comparison will determine how much load is released to balance the generator supply. This study analyzes UFR performance at Pesanggaran Substation by simulating a case of the generator being released so as to produce a decreased system frequency state. The method used is by comparing the ETAP simulation results and calculation results. The results of the comparison obtained the system recovery time when the conditions (gen1 tripped), (gen1 and gen2 tripped), and (gen1, gen2, and gen3 tripped), each is 1.171s; 4,531s; and 4,514s.

Voltage Instability Analysis for Electrical Power System Using Voltage Stabilty Margin and Modal Analysis

2016 ◽  
Vol 3 (3) ◽  
pp. 655 ◽  
Author(s):  
Ahmad Fateh Mohamad Nor ◽  
Marizan Sulaiman ◽  
Aida Fazliana Abdul Kadir ◽  
Rosli Omar
Keyword(s):  
Power System ◽  
Modal Analysis ◽  
Electric Power ◽  
Reactive Power ◽  
Research Work ◽  
Load Flow ◽  
Electric Power System ◽  
Instability Analysis ◽  
Real Power ◽  
Voltage Instability

Voltage instability analysis in electric power system is one of the most important factors in order to maintain the equilibrium of the power system. A power system is said to be unstable if the system is not able to maintain the voltage at all buses in the system remain unchanged after the system is being subjected to a disturbance.The research work presented in this paper is about the analysis of voltage instability of electric power system by using voltage stability margin (VSM), load real power (P) margin, reactive power (Q) margin, reactive power-voltage (QV) and real power-voltage (PV) modal analysis. IEEE 30-bus system has been chosen as the power system. The load flow analysis are simulated by using Power World Simulator software version 16. Both QV and PV modal analysis were done by using MATLAB application software.

All-mode Validation of Calculations in the Analysis of Electric Power

2020 ◽  
Vol 11 (11) ◽  
pp. 28-37
Author(s):  
Aleksey A. SUVOROV ◽  
◽  
Alexander S. GUSEV ◽  
Mikhail V. ANDREEV ◽  
Alisher B. ASKAROV ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Differential Equations ◽  
Power System ◽  
Electric Power ◽  
Field Data ◽  
Transient Stability ◽  
Experimental Studies ◽  
Electric Power System ◽  
Adequate Model ◽  
Simulation Results

The transient stability is the main condition for reliability and survivability operation of electric power system. The transient stability analysis is an extremely complex problem. It uses the results of numerical integration of differential equations that form a mathematical model of the power system. However, the mathematical model of a large-scale power system contains a rigid nonlinear system of extremely high-order differential equations. Such system cannot be solved analytically. The simplifications and limitations are used for improving the conditionality of the power system mathematical model in time-domain simulation. It decreases the reliability and accuracy of the simulation results. In this regard, it becomes necessary to validate them. The most reliable way of validation is to compare simulation results with field data. However, it is not always possible to receive the necessary amount of field data due to many power system states and a large amount of disturbances leading to instability. The paper proposes an alternative approach for validation: using an adequate model standard instead of field data. The prototype of Hybrid Real Time Power System Simulator having the necessary properties and capabilities has been used as the reference model. The appropriate sequence of actions has been developed for validation. The adequacy of proposed approach is illustrated by the fragments of the experimental studies

Geometric Parameterization Technique Based Continuation Power Flow and its Applications in AC/DC Hybrid Power System

2013 ◽  
Vol 732-733 ◽  
pp. 857-863
Author(s):  
Chao Jie Guan ◽  
Jin Quan Zhao ◽  
Jian Hua Yin ◽  
Kun Men ◽  
Chao Hong
Keyword(s):  
Power System ◽  
Power Flow ◽  
Voltage Stability ◽  
Stability Limit ◽  
Hybrid Power System ◽  
Continuation Power Flow ◽  
Dc System ◽  
Hybrid Power ◽  
Dc Power ◽  
Predictor Corrector

A new continuation power flow method based on local geometric parameterization technique is proposed for voltage stability analysis of AC/DC hybrid power system. By means of the alternating iteration method as the AC/DC power flow algorithm, the proposed method takes the coupling relationship between AC and DC systems into account to modify Jacobian matrix of AC system. Constraints of variables in DC system are also considered, as well as the adjustment of converter transformers tap position and the conversion of converters control modes. Based on the predictor-corrector method, this paper adopts the geometric corrector, and changes the direction of convergence effectively. According to different operation modes of AC/DC system, accurate voltage stability limit and the entire PV curve can be acquired. Simulation results of IEEE test systems are used to show the validity of the proposed algorithm.

scholarly journals Load Flow Analysis and Short Circuit Faults with the Additional Distributed Generation Wind Turbine 300 kW at Andalas University

2021 ◽  
Vol 1 (1) ◽  
pp. 41-47
Author(s):  
Fadhel Putra Winarta ◽  
Yoli Andi Rozzi
Keyword(s):  
Power System ◽  
Wind Turbine ◽  
Electric Power ◽  
Power Flow ◽  
Voltage Drop ◽  
Short Circuit ◽  
Flow Analysis ◽  
Load Flow ◽  
Electric Power System ◽  
A Value

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%.

scholarly journals Analisis pengaruh penambahan gardu induk Guluk-Guluk terhadap aliran daya dan profil tegangan pada sub sistem Krian Gresik

JURNAL ELTEK ◽  
2021 ◽  
Vol 19 (2) ◽  
pp. 55
Author(s):  
Rohmanita Duanaputri ◽  
Imron Ridzki ◽  
Egar Rahmat Maulana ◽  
Ayusta Lukita Wardani
Keyword(s):  
Power System ◽  
Electric Power ◽  
Power Flow ◽  
Voltage Drop ◽  
Electric Power System ◽  
Load Demand ◽  
Before And After ◽  
Voltage Frequency ◽  
The Stability ◽  
And Control

  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.

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