Design of HTS Magnetically Controlled Saturable Reactor

2013 ◽  
Vol 380-384 ◽  
pp. 2982-2985
Author(s):  
Hong Da Dong
Keyword(s):  
High Temperature ◽  
High Voltage ◽  
Large Scale ◽  
Reactive Power ◽  
Magnetic Circuit ◽  
Reactive Power Compensation ◽  
Model Design ◽  
Power Capacity ◽  
Wide Range ◽  
Small Capacity

There are many problems for traditional reactive power compensation devices to be applied in the grid, such as discontinuous adjustment, small capacity, complex control and harmonics. This paper aims to study a high temperature superconducting magnetically controlled saturable reactor (HTS MCSR), which has a wide range of stepless adjustment. It has a good application prospect in large scale reactive power compensation devices. Based on research of theory and core structure, a shaped-cylinder core is proposed. By means of calculation of saturable reactor and analysis of algebraic and magnetic circuit model, design of 220V HTS MCSR is finished. Results of normal conductive reactor prototype and simulations verify that the range of inductance adjustment is very wide. Furthermore, conceptual design of 35kV HTS MCSR confirms its reactive power capacity is so large, therefore, it is suitable for high voltage power system.

Prototype Test for Confirming the Concept of HTS Magnetically Controlled Saturable Reactor

2013 ◽  
Vol 732-733 ◽  
pp. 1090-1094 ◽  
Author(s):  
Hong Da Dong ◽  
Li Ren ◽  
Ying Xu ◽  
Yue Jin Tang ◽  
Meng Song ◽  
...  
Keyword(s):  
High Temperature ◽  
Operating Characteristic ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Experimental Basis ◽  
Power Capacity ◽  
Long Distance ◽  
Prototype Test ◽  
Wide Range ◽  
Compensation Device

With the development of high voltage long distance transmission and expansion of the grid, the reactive power compensation device with excellent adjustment function becomes more and more important. This paper aims to study a high temperature superconducting magnetically controlled saturable reactor (HTS MCSR), which has a wide range of stepless reactive power capacity adjustment and little operating loss. An adjustable reactor topology of three split limbs core was proposed. Based on research of structure and theory, the operating characteristic was obtained. A normal conductive prototype was manufactured. Simulation and test were done to verify the adjustment characteristic of this reactor. The results confirm the concept and provide an experimental basis for developing HTS MCSR in the future.

Research on a Novel Hybrid Adjustable Reactor

2013 ◽  
Vol 732-733 ◽  
pp. 988-992 ◽  
Author(s):  
Meng Song ◽  
Hong Da Dong ◽  
Da Da Wang ◽  
Kun Nan Cao ◽  
Li Ren ◽  
...  
Keyword(s):  
Simulation Model ◽  
High Voltage ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Power Capacity ◽  
Long Distance ◽  
Long Distance Transmission ◽  
Harmonic Content ◽  
Variation Range

With the development of high voltage long distance transmission and expansion of the grid, continuous reactive power compensation devices become more and more important. This paper aims to analyze a novel hybrid adjustable reactor. Based on analysis of structure and theory, simulation model and prototype are done to verify the characteristics of this reactor. Results of simulation and test confirm that the variation range of reactive power capacity is 3.5%~84.0%, and work voltage and current are approximately sinusoidal, the harmonic content is quite little. In a word, this novel hybrid adjustable reactor will play an important role in reactive power compensation.

Researches on Reactive Compensation for Long-Distance and Highcapacity Hybrid Submarine Cable Lines

2012 ◽  
Vol 433-440 ◽  
pp. 2406-2410
Author(s):  
Dong Mei Sun ◽  
Jun Wen
Keyword(s):  
High Voltage ◽  
Transmission Lines ◽  
Reactive Power ◽  
High Capacity ◽  
Reactive Power Compensation ◽  
Submarine Cable ◽  
Long Distance ◽  
Power Frequency ◽  
Electro Magnetic ◽  
Cable Lines

In order to balance reactive power, reduce line losses, prevent excessive power frequency and switching over-voltage and adjust and control the line voltage etc. The long-distance and high voltage transmission lines are needed reactive power compensation. High voltage overhead transmission lines and high voltage submarine cable (including mixed-submarine) transmission lines are different, for example, the capacitance in the submarine cable lines is larger than in the conventional overhead lines. Therefore, the reactive power compensation on the EHV transmission lines which contains submarine cable lines is focus on the compensation of submarine cable lines. The reactive power compensation in 500 kV AC submarine cable interconnection project for Hainan power grid and Guangdong power grid[1], which is the first 500 kV long-distance and high-capacity sea trails interconnection project in China and which is just completed soon, is researched by Electro-Magnetic Transient Program——PSCAD/EMTDC (Power System Computer Aided Design/ Electro Magnetic Transient in DC System in this paper). The simulation results verifies that the role of shunt reactor which could absorb charging power and suppress the power frequency overvoltage for the long-distance and high-capacity hybrid submarine cable lines. The conclusions can offer references to suppress power frequency overvoltage and the reactive power compensation in extra high voltage transmission lines which is the mixed mode of overhead transmission lines and submarine cables.

scholarly journals Multiobjective Reactive Power Optimization of Renewable Energy Power Plants Based on Time-and-Space Grouping Method

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3556
Author(s):  
Linan Qu ◽  
Shujie Zhang ◽  
Hsiung-Cheng Lin ◽  
Ning Chen ◽  
Lingling Li
Keyword(s):  
Renewable Energy ◽  
Power Plants ◽  
Large Scale ◽  
Reactive Power ◽  
Power Optimization ◽  
Reactive Power Compensation ◽  
Mixed Integer ◽  
Reactive Power Optimization ◽  
Time And Space ◽  
Bus Voltage

The large-scale renewable energy power plants connected to a weak grid may cause bus voltage fluctuations in the renewable energy power plant and even power grid. Therefore, reactive power compensation is demanded to stabilize the bus voltage and reduce network loss. For this purpose, time-series characteristics of renewable energy power plants are firstly reflected using K-means++ clustering method. The time group behaviors of renewable energy power plants, spatial behaviors of renewable energy generation units, and a time-and-space grouping model of renewable energy power plants are thus established. Then, a mixed-integer optimization method for reactive power compensation in renewable energy power plants is developed based on the second-order cone programming (SOCP). Accordingly, power flow constraints can be simplified to achieve reactive power optimization more efficiently and quickly. Finally, the feasibility and economy for the proposed method are verified by actual renewable energy power plants.

scholarly journals MODELING AND SIMULATION OF STATCOM FOR POWER QUALITY IMPROVEMENT

2021 ◽  
Vol 9 (2) ◽  
pp. 217-229
Author(s):  
Ch. Umamaheswararao, Et. al.
Keyword(s):  
Power Quality ◽  
Distribution Systems ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Voltage Profile ◽  
Inductive Load ◽  
Linear Load ◽  
Three Phase ◽  
Quality Aspects ◽  
Wide Range

In power system, reactive power compensation is one of the important action to maintain better voltage profile, stability and decrease losses. STATCOM is feasible in terms of cost effective in wide range of problem solving capabilities among all Flexible AC Transmission system (FACTS) in both transmission and distribution levels. In this paper the synchronous rotating frame theory algorithm is used since it is easy to implement i.e. the rotating three phase quantities are converted into stationary components. So it requires less number of PI controllers and also calculations on the stationary quantities are easy than to do calculations on instantaneous quantities and the modeling of STATCOM is done.  This project focuses on improvement of power quality in a three phase three wire system with a non-linear load i.e., three phase bridge rectifier and a parallel inductive load. Some power quality aspects like reactive power compensation of linear load, better Total Harmonic Distortion (THD) performance and the power factor improvement are achieved. The result shows the THD of input current achieved as per the IEEE 519-1992 standard. It is observed that STATCOM gives effective compensation for reactive power variation and hence the power quality of distribution systems improved.

scholarly journals Calculating Reactive Power Compensation for Large-Scale Street Lighting

2020 ◽  
pp. 538-550
Author(s):  
Sebastian Ernst ◽  
Leszek Kotulski ◽  
Tomasz Lerch ◽  
Michał Rad ◽  
Adam Sȩdziwy ◽  
...  
Keyword(s):  
Large Scale ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Street Lighting

Trigger Circuit Design for Series SCRs Valve Bank

2012 ◽  
Vol 468-471 ◽  
pp. 2912-2915 ◽  
Author(s):  
Li Wang ◽  
Yan Qing Pang ◽  
Zhi Ming Song ◽  
Tang Sheng Xun ◽  
Hong Yu Gao ◽  
...  
Keyword(s):  
Circuit Design ◽  
High Voltage ◽  
Simple Structure ◽  
Reactive Power ◽  
Reactive Power Compensation ◽  
Pulse Transformer ◽  
Voltage Source ◽  
Switched Capacitor ◽  
Trigger Circuit ◽  
Compensation Device

This article introduces the trigger circuit of series SCRs valve and a new trigger circuit is designed for series SCRs valve of TSC. The trigger circuit is driven by voltage source and a high voltage cable is used for insulation of the pulse transformer. The trigger circuit has simple structure and a steep front of gate-current. This unit is used in 10 kV thyristor switched capacitor (TSC) reactive power compensation device, and the results verify its feasibility.

On the issue of improving the efficiency of power systems and substantiation of reactive power compensation in electric networks

2021 ◽  
Vol 13 (4) ◽  
pp. 267-272
Author(s):  
M. M. Sultanov ◽  
A. V. Strizhichenko ◽  
I. A. Boldyrev ◽  
O. I. Zhelyaskova ◽  
E. A. Voloshin ◽  
...  
Keyword(s):  
High Voltage ◽  
Active Component ◽  
Reactive Power ◽  
Voltage Drop ◽  
Reactive Power Compensation ◽  
Power Losses ◽  
Reactive Component ◽  
Voltage Range ◽  
Electric Network ◽  
Active And Reactive Power

Reactive power in the power system negatively affects the operating mode of the electric network, additionally loading high-voltage lines and transformers, which leads to an increase in power losses, as well as to an increase in voltage drops. The influence of active and reactive power components of voltage in the network nodes is different and is overwhelmingly determined by the ratio of active and reactive components of the resistance elements of the electric system. In high-voltage networks, the reactive component of the resistance significantly exceeds the active component, and therefore the flow of reactive current through the network leads to a greater voltage drop than the flow of the active component of the current. The transfer of reactive power can lead to exceeding the normalized voltage range in the load nodes. To reduce power losses and voltage drop in the elements of the electric network, synchronous compensators (SC), static capacitor banks (SCB), static thyristor compensators (STC), controlled shunt reactors (CSR) can be used. The cost of production and transmission of active and reactive power are different, and when choosing the power of reactive power compensation means, it is necessary to take into account the costs and compare them with the resulting effect, which differs for large and small values of reactive power when this is reduced by the same amount. To assess the feasibility of application of compensatory devices, and to choose their type and locations of installation, relevant calculations are required. An empirical criterion is proposed for preliminary assessment of the technical feasibility of reactive power compensation. It enables to identify the network sections and nodes, which require reactive power compensation and should be considered in greater detail.

A Dynamic Reactive Power Compensation Method of Super High-Power and High-Voltage Motor

2014 ◽  
Vol 602-605 ◽  
pp. 2828-2831 ◽  
Author(s):  
Yi Fei Wang ◽  
You Xin Yuan ◽  
Jing Chen ◽  
Qi Jian Cheng
Keyword(s):  
High Voltage ◽  
High Power ◽  
Reactive Power ◽  
Industrial Applications ◽  
Reactive Power Compensation ◽  
Compensation Method ◽  
The Novel ◽  
Parameter Setting ◽  
Compensation Device ◽  
Novel Design

According to the low power factor and low running efficiency, a dynamic reactive power compensation method of the super high-power and high-voltage motor is proposed in this paper. The following works have been done in the study: topology of the dynamic reactive power compensation device; principle of the dynamic reactive power compensation method; control system of the dynamic reactive power compensation device; implementation of the dynamic reactive power compensation method. The amount of reactive power compensation can be adjusted smoothly and dynamically in the process of the super high-power and high-voltage motor soft-starting. The research of this paper has laid a theoretical foundation for this compensator in industrial applications. The novel design is characterized by flexible parameter setting, excellent soft starting performance of the super high-power and high-voltage motor and bright prospect in application.

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