Reactive power compensation and voltage control in Jinan power distribution system

2005 ◽  
Author(s):  
Yutian Liu ◽  
Jiachuan Shi ◽  
Xia Qian
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Voltage Control ◽  
Reactive Power Compensation ◽  
Power Distribution System

A Novel Control Strategy for Three-Phase Four-Wire STATCOM

2012 ◽  
Vol 516-517 ◽  
pp. 1722-1727 ◽  
Author(s):  
Wei Jun Yun ◽  
Gang Yao ◽  
Li Dan Zhou ◽  
Chen Chen ◽  
Jun Min Pan
Keyword(s):  
Control Strategy ◽  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Control Method ◽  
Loop Control ◽  
Power Distribution System ◽  
Imbalance Problem ◽  
Three Phase ◽  
Close Loop Control

Nowadays Static Synchronous Compensator (STATCOM) has gradually become one of the representative techniques in the field of dynamic reactive power compensation in the power distribution system. This paper analyzed the topology and the voltage imbalance problem of the up and down capacitors on DC side of the three-phase four-wire STATCOM. In allusion to the imbalance problem of neutral point, a novel control strategy based on the control of zero-sequence current was proposed. By the triple close-loop control strategy, the STATCOM can achieve great control accuracy and dynamic performance. Simulation result proves that the proposed control method is effective.

scholarly journals DSTATCOM Performance for Voltage Sag/swell Mitigation

2020 ◽  
Vol 9 (2) ◽  
pp. 71-74
Keyword(s):  
Power Quality ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Reactive Power ◽  
Power Transmission ◽  
Control Technique ◽  
Power Distribution System ◽  
Industrial Sectors ◽  
Voltage Compensation

The Indian economy has been growing at a fast pace since the beginning of this millennium. Due to constraints in the availability of fuel and environmental concerns, the power generation sector has not kept pace with other industrial sectors. One way of increasing the power availability is by reducing the high losses in the existing power transmission and distribution systems. The current increases in the motor windings when the voltages in the three phases are unbalanced. Compensation for reactive power and unbalance in the power distribution system are key factors in improving the power quality to the end user. A Distributed Static Compensator [DSTATCOM] is a custom power device, which is connected in shunt with the load in the distribution system to compensate the reactive power due unbalanced loads. The performance of the DSTATCOM is based on the control technique used for finding the voltage referred and current components to be considered. Voltage compensation is defined as the error in voltage in the grid and that the value of voltage that has to be induced in the grid. This is analyzed by using DSTATCOM for voltage compensation with series converter controller block. This paper gives the simulation of voltage compensation to rectify the issue of voltage swell/sag in order to improve the power quality in the distribution system.

scholarly journals Analysis of Power Loss of 20 kV Power Distribution

2018 ◽  
Vol 215 ◽  
pp. 01040
Author(s):  
Dasman Dasman
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Power Loss ◽  
Reactive Power ◽  
Voltage Drop ◽  
Action Plan ◽  
Active Power ◽  
Power Losses ◽  
Power Distribution System ◽  
Distribution Line

In the distribution of electrical energy from the plant to the consumer, there is a decrease in quality due to the loss of power (losses). These power losses are caused by a voltage drop across the line and subsequently producing a power loss on the line. This power loss can be classified into two types based on its line parameters, i.e., active power loss and reactive power loss. The line’s active power loss generates losses of power/losses so that the active power reaches the load on the receiving end is always less than the productive power of the sender side. Power losses in the electrical system must exist and cannot be reduced to 0% (zero percent). According to SPLN No. 72 of 1987, the permitted distribution network’s power loss should not be higher than 10%. This paper investigates the magnitude of the voltage loss and the line active power losses on the 20 kV distribution line. The calculation conducted through case study and simulation of Etap 12.6 program on an electrical power distribution system that is 20 kV distribution line in PT. PLN (Persero) Rayon Muara Labuh. In the distribution line 20 kV, there is IPP (Independent Power Plant) PLTMH PT SKE used to improve the stress conditions in Rayon Muara Labuh. Therefore the loss of power will be calculated in 3 terms, i.e., before and after IPP PT. SKE with 20 kV distribution lines as well as on feeder load maintenance (as a repair action plan). The simulation results show the highest voltage drop and the highest power losses continue generated during IPP. PT SKE has not done synchronized with the distribution line of 20 kV with a significant voltage drop of 1,533 kV percentage of 7.93% and power loss of 777.528 kWh percentage of 7.69%.

Based on STATCOM in Power Distribution System Design and Simulation

2012 ◽  
Vol 220-223 ◽  
pp. 1249-1253 ◽  
Author(s):  
Qi Chao Zhang
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Control Method ◽  
Effective Means ◽  
Fast Response ◽  
Current Control ◽  
Power Distribution System ◽  
Line Loss ◽  
Node Voltage

The basic role of the STATCOM are continuous and rapid control of reactive power, fast response, issued or absorb reactive power to control the transmission system it is connected to the node voltage, inhibition of harmonic pollution, reduce line loss. The development of STATCOM is to solve the problem of voltage stability and effective means, is the main development direction of DFACTS technology. According to the direct current control method to design compensation device, emphatically introduces the device main circuit design step and process, and use MATLAB software simulation, the feasibility of the design is proved.

scholarly journals A Generalized Model and Control forSupermagnetic and Supercapacitor EnergyStorage

2017 ◽  
Vol 13 (26) ◽  
pp. 147-171 ◽  
Author(s):  
Walter Julián Gil González ◽  
Alejandro Garcés ◽  
Andrés Escobar
Keyword(s):  
Energy Storage ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Reactive Power ◽  
Magnetic Energy ◽  
Current Source ◽  
Space Representation ◽  
Power Distribution System ◽  
Electrical Distribution

This paper presents a generalized linear model based on LMI state-feedbackwith integral action, applicable to the control of Electric Energy Stora-ge Systems (EESS) such as Superconducting Magnetic Energy Storage(SMES) and Supercapacitor Energy Storage (SCES). A Voltage SourceConverter (VSC) and a Pulse-Width modulated Current Source Converter(PWM-CSC) are respectively used to integrate the SCES and the SMESsystems to the electrical distribution system. To represent the dynamicsbetween the EESS and the power distribution system a reduced generallinear model in the state-space representation is introduced. The proposedcontrol scheme regulates independently the active and reactive power flowbetween the EESS and ac the grid. Three case scenarios comparing a con-ventional PI controller and the proposed technique are conducted conside-ring grid voltage fluctuations. Extensive time-domain simulations demons-trate the robustness and proper performance of the proposed controller to operate the EESS as power compensator, in order to improve the operativeconditions of electrical distribution systems.

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