IJEA - Volume 5 Issue 7 (July2016)

 


Sr/No/ Title Pdf
1 A Study on Multi-Fuzzy Cosets
R.Muthuraj, S.Balamurugan

Abstract-In this paper we define a new algebraic structures of multi-fuzzy coset, multi-fuzzy middle coset, multi-pseudo fuzzy coset, multi-pseudo fuzzy double coset and some of its related properties are investigated. The purpose of this study is to implement the fuzzy set theory and group theory in multi-fuzzy sets. Characterizations of multi-fuzzy coset, multi-fuzzy middle coset, multi-pseudo fuzzy coset, multi-pseudo fuzzy double coset on a multi-fuzzy subgroup and multi-anti fuzzy subgroup of a group are given.

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2 Flow Analysis of two different evaporator arrangements in a Cold Storage using CFD
Siddharth Shukla, Prof. Keshavendra Choudhary, Mahesh Tiwari

Abstract-As the demand for refrigeration and Air conditioning has been increased during the last decade, the cold storage system can be used to the economic advantage over conventional plants. Energy conservation is required in the cold storage system so The Design of arrangement is used to Optimization of different parameters of cold storage on the bases of performance experiments. This paper represents the temperature distribution and velocity distribution for axial flow evaporator and mix flow evaporator arrangement in a refrigerated cold storage. A CFD analysis is done under steady state for air flow distribution and temperature distribution using a three dimensional model. In this paper a three dimensional model for a cold storage [10 m(l)× 08 m(w)×09m(h)] prepared. The performance analysis done for both the coils arrangement having the same cooling capacity, air velocity and discharge temperature. After getting all the results based on CFD and analyzing we can conclude that, both temperature distribution and velocity distribution is better in mix flow cooling coil arrangement compare to axial flow cooling coil arrangement for same initial and boundary condition.

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3 Experimental study of removing heavy metals from water solution using rice husk as an adsorbent
Anuradha N Joshi

Abstract-Intensive mining operations and processing of minerals to meet the ever-increasing needs of our industrial society have generated problems related to environmental pollution in all over the world. Heavy metals are now days one of the most important pollutants in source and treated water and are becoming a severe public health problem. Here we are taking two heavy metals for the study; cadmium & Arsenic. Here we are using the adsorption technique for the removal of heavy metals from the aqueous solutions. To overcome the problem of cost of adsorbent we can use the low cost adsorbents from agricultural waste. Here we used the rise husk as an adsorbent The adsorption behavior of rice husk for cadmium and arsenic ions from aqueous solutions has been investigated as a function of appropriate equilibrium time, amount of adsorbent and concentration of adsorbate using a batch system. Various parameters such as contact time, temperature and metal concentrations were studied and applied to the present study. The results showed that the rise husk as an adsorbent was very effective in the removal of cadmium and arsenic not only at low initial concentrations (for cadmium7.28 ppm & for arsenic 434 ppm) but also at high concentration (for cadmium 14.57 ppm& for arsenic 868 ppm). The rate of adsorption at room temp. and low concentration was – for cadmium: 0.242ppm/min; for arsenic 14.4 ppm/min and efficiency for cadmium is 100% & for arsenic it is 99.9% . The rate of adsorption at room temp. and high concentration was – for cadmium: 0.481 ppm/min; for arsenic 0.926ppm/min and efficiency for cadmium is 99% & for arsenic it is 92.6% The graphs are plotted to show the comparison of the removal of cadmium and arsenic at different concentrations and temperature with change in time.

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4 A review: Use of Ipomoea Carnea as an adsorbent
Anuradha N Joshi

Abstract-This review is aimed to study the performance of Ipomoea Carnea as an adsorbent material for the removal of heavy metals such as Cu from aqueous solution. There are various bio-adsorbents available which are used to remove metals from waste water. By the literature survey it is clear that apart from medicinal uses Ipomoea carnea has the maximum adsorption capacities for the removal of heavy metals.

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5 Cooling Of Wash Oil in Benzol Recovery Plant By Using Plate Heat Exchanger
Saurabh Meshram

Abstract-Plate Heat Exchanger is used for the cooling of Wash Oil ( Debenzolised oil), a product of petroleum refining and required in Benzol Recovery as absorbent . This design is a supporting work for the replacement of the old serpentine cooler used for cooling of Debenzolized wash oil in Bhilai S teel Plant. The serpentine oil coolers in Bhilai S teel Plant are of old design and the heat removal /cooling efficiency is very poor, as such this paper is envisaged to design a suitable Plate Heat Exchanger for cooling the debenzolised wash oil from 100 0C to 35 0 C.

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6 Static Structural Study And Finite Element Analysis of Beam using ANSYS v 14
Shubham Patil, Shalini Yadav, Rachana M Bajaj

Abstract-This paper presents the analysis of beam section due to increasing demands now days for construction purposes so for that purposes various experimental as well as simulation has been done. In this research work it presents the stress analysis of beam section by using finite element analysis with FEM packaging software Ansys V 14 . In this paper a beam is analyzed and results were studied and discussion was made on the various parameter like total deformations , directional deformation, path analysis, Maximum principal stress etc. A beam is applied with a load and results were interpreted with the available data.

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7 Finite Element Analysis And Parametric studies on Hot Rolled Steel I Section using ANSYS v 14
Shrish Chandrawanshi, Rachna M bajaj, Shalini Yadav

Abstract-Static structural analysis has now days become very popular for the purpose of analyzing the structural elements like Beam, Column, Strut, structural steel ,RC beam, solid, shell etc. Experimental investigation though shows real life responses but it sometime takes time as well as it costs heavy. But for that various technique and methods of analyzing the Element become very simplified though these analyses give approximate results. But it economical and time saving phenomenon. Therefore considering the analysis results were made compared with available data.

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8 Advanced Product Quality Planning (APQP) an Effective Tool in Quality Management System
R.D.Patil, A.R.Dandekar

Abstract-In now days the Customer satisfaction is an important term in industries. More options are available for the Customers due to the process of globalization. Hence there have growing competition in the market. And from manufacturer oriented the market is now transformed into the Customer oriented. There are various techniques used by industries to attract and retain the Customer, like after service, discount etc. But product quality and reliability is an important thing, And that can be achieved only through various Quality management techniques. This paper discusses about the effectiveness of Advanced Product Quality Planning (APQP) with the help of actual case study in Industry.

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9 Some Characterization of L – Fuzzy - Hx Group
R.Muthuraj, T.Rakesh Kumar

Abstract-In this paper In this paper, we define a new algebraic structure of L – fuzzy  - HX group and some related properties are investigated. We also discuss the properties of L – fuzzy sub  - HX group under  - HX group homomorphism and  - HX group anti homomorphism.

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10 Energy Efficient Clustering Based Routing Protocol for Mobile Wireless Sensor Networks
Kasa Saguna, Dr.Tirumala Ramashri

Abstract-A Wireless Sensor Network (WSN) consists of spatially distributed sensor nodes,which are interconnected without use of any wires. In a WSN, sensor nodes sense the environment and use their communication components in order to transmit the sensed data over wireless channels to other nodes and to a designated sink point, referred to as the Base Station (BS). In this paper to implement Energy Efficient Fault Tolerant Routing Protocol (EFTCP) protocol for Wireless Sensor Networks. The EFTCP has high fault tolerance through providing an alternate for each cluster head node. EFTCP protocol can also reach efficient message transmission by the method that cluster heads adaptively allocate timeslots to their member nodes according to the amount of data needed to send. EFTCP reaches high fault tolerance, improves the efficiency of data transmission and more energy efficient in terms of network lifetime. The performance evaluation of EFTCP and LEACH is carried out through simulation tests by using NS-2 (Network Simulator) for the parameters such as energy consumed, throughput and packets sent by varying number of nodes, number of connections and speed of nodes. Simulation results show that EFTCP-MWSN protocol is more energy efficient in terms of network lifetime than LEACH.

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11 High efficient and reliable single phase transformer less inverter with ac-coupled inductors for Grid connected PV systems
S.Ashwini, K.Sujesh

Abstract-The pv systems are designed with transformer for safety purpose with galvanic isolation. However, the transformer is big, heavy and expensive. Also, it reduces the overall frequency of the conversion stage. Generally PV inverter with transformer is having efficiency around 92%– 94% only. To overcome these problems, transformer less PV system is introduced. It is smaller, lighter, cheaper and higher in efficiency. However, dangerous leakage current will flow between PV array and the grid due to the stray capacitance. There are different types of configurations available for transformer less inverters like H5, H6, HERIC, oH5, and Dual paralleled buck inverter. But each configuration is suffering from its own disadvantages like high conduction losses, shoot-through issues of switches, dead-time requirements at zero crossing instants of grid voltage to avoid grid shoot-through faults and MOSFET reverse recovery issues. The main objective of the proposed transformer less inverter is to address two key issues: One key issue for a transformer less inverter is that it is necessary to achieve high efficiency compared to other existing inverter topologies. Another key issue is that the inverter configuration should not have any shoot-through issues for higher reliability.

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12 EHigh Frequency Inverter for a Single Reference Six Pulse Modulation (SRSPM) Technique
G.Srinivas, N.Netaji Gandhi, I.Rahul

Abstract-A hybrid modulation technique consisting of singe-reference six pulse modulation (SRSPM) for front end dc/dc converter and 33% modulation to the three-phase inverter. Employing proposed novel SRSPM for control front-end dc/dc converter, high frequency (HF) pulsating dc voltage waveform is produced, that is equivalent to six-pulse output at 6× line frequency (rectified 6-pulse output of balanced three-phase ac waveforms) once averaged. It reduces the control complexity owing to singlereference three-phase modulation as compared to conventional three-reference three-phase SPWM. In addition, it relives the necessity of dc-link capacitor reducing the cost and volume. Eliminating dc link capacitor helps in retaining the modulated information at the input of the three-phase inverter. It required only33% (one third) modulation of the inverter devices to produce balanced three-phase voltage waveforms resulting in significant saving in (at least 66%) switching losses of inverter semiconductor devices. At any instant of line cycle, only two switches are required to switch at HF and remaining switches retain their unique state of either ON or OFF. At the same time inverter devices are not commutated when the current through them is at its peak value. Drop in switching loss is very high in comparison with a standard voltage source inverter (VSI) employing standard three-phase sine pulse width modulation. This proposed work explains operation and analysis of the HF two-stage inverter modulated by the proposed modulation scheme. MATLAB 7.12.0.635 software is used for the analysis of the system.

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13 Improve the stability of Fixed-Speed Induction Generators using Stat-com control under Asymmetrical Grid Faults in wind forms
G.Hymavathi, Dr.T.Rajasekar

Abstract-In this improve the stability using Statcom control of fixed-speed induction generator based wind turbines, which is well known and documented in the literature for balanced grid voltage dips. Under unbalanced grid voltage dips, the negative-sequence voltage causes heavy generator torque oscillations that reduce the lifetime of the drive train. In this paper, investigations on an FSIG-based wind farm in combination with a StatCom under unbalanced grid voltage fault are carried out by means of theory, simulations, and measurements. A StatCom control structure with the capability to coordinate the control between the positive and the negative sequence of the grid voltage is proposed.

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14 Pitch Control Technique for Stand-Alone Wind Energy Conversion System
B.Karunakar, Dr.T.Rajasekar

Abstract-The major source of power is from the conventional sources only. Some of the conventional sources of energies like thermal energy is produced from the fossil fuel coal which are depleting and is only limited to 2030. Renewable sources of energies are Solar, Wind, Biomass, etc hold bright prospect for the future. Wind industry has made rapid strides in the recent years. In order to ensure continuous supply of power suitable storage technology is used as backup. In this paper, the sustainability of a 4-kW hybrid of wind and battery system is investigated for meeting the requirements of a 3-kW stand-alone dc load representing a base telecom station. A charge controller for battery bank based on turbine maximum power point tracking and battery state of charge is developed to ensure controlled charging and discharging of battery. The mechanical safety of the WECS is assured by means of pitch control technique. Both the control schemes are integrated and the efficacy is validated by testing it with various load and wind profiles in MATLAB/SIMULNIK.

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15 Voltage Regulation in multiple distributed energy resources by using plug-and-play control method
B.Mahender, Dr.T.Rajasekar

Abstract-An adaptive voltage control method has been proposed to dynamically modify the control parameters of a single Distributed energy (DE) to respond to system changes such that the ideal response can be achieved. Theoretical analysis shows that a corresponding formulation of the dynamic control parameters exists; hence, the adaptive control method is theoretically solid. Then, control methods have been discussed in the case of multiple Distributed energy resources regulating voltages considering the availability of communications among all the Distributed energy resources. When communications are readily available, a method is proposed to directly calculate the needed adaptive change of the Distributed energy resource control parameters in order to achieve the ideal response. When there is no communication available, an approach to adaptively and incrementally adjust the control parameters based on the local voltage changes is proposed. Since the impact from other Distributed energy resources is implicitly considered in this approach, multiple Distributed energy resources can collectively regulate voltages closely following the ideal response curve.

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16 Power Quality Improvement Using New Control Algorithm Based Dynamic Voltage Restorer
G.Narendar, P.Srikanth

Abstract-Power quality is one of the major concerns in the present era. The problem of voltage sags and swells and its major impact on sensitive loads are well known. To solve this problem, custom power devices are used. One of those devices is the Dynamic Voltage Restorer (DVR), which is one of the most efficient and effective modern custom power devices used in power distribution networks. A new control algorithm for the DVR is proposed in this paper to regulate the load terminal voltage during sag, swell in the voltage at the point of common coupling (PCC). This new control algorithm is based on synchronous reference frame theory (SRF) along with PI controller is used for the generation of reference voltages for a dynamic voltage restorer (DVR). These voltages, when injected in series with a distribution feeder by a voltage source inverter (VSI) with PWM control, can regulate the voltage at the load terminals against any power quality problem in the source side. It first analyzes the power circuit of the system in order to come up with appropriate control limitations and control targets for the compensation voltage control through the DVR. The control of the DVR is implemented through derived reference load terminal voltages. The proposed control scheme is simple to design. Simulation results carried out by MATLAB with its Simulink and Sim Power System (SPS) toolboxes to verify the performance of the proposed method.

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17 Wind Generator for Grid Integration and Hybrid Active Generation of Distributed Power
M.Neelabai, P.Srikanth

Abstract-The fluctant wind conditions the grid requirement generated power not depends .This paper describes the dc-wind /hydrogen /super capcitor hybrid power system and the purpose of the control system is to cordinate these different sources.Particaally their power exchange ,in order to make the controllable the generated power.An active wind generator can be built to provide some ancillary services to the grid are the results in this paper.The control system should be adapted to integrate the power management strategies..Two power management stratgesis are presented and compared experimentally.We executed that the source following strategy has better performance on the grid power regulation than the grid following strategy.

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18 Elimination of Common Mode Leakage Current in Photovoltaic Grid Connected Power System
Shaik.Usman, CH.Venkatesh

Abstract-To eliminate the common-mode leakage current in the transformer less photovoltaic gridconnected system, an improved single-phase inverter topology is presented. The improved transformer less inverter can sustain the same low input voltage as the full-bridge inverter and guarantee to completely meet the condition of eliminating common-mode leakage current. Both the unipolar sinusoidal pulse width modulation (SPWM) as well as the double frequency SPWM control strategy can be applied to implement the three-level output in the presented inverter. The high efficiency and convenient thermal design are achieved thanks to the decoupling of two additional switches connected to the dc side. Moreover, the higher frequency and lower current ripples are obtained by adopting the double-frequency SPWM, and thus the total harmonic distortion of the gridconnected current are reduced greatly. Furthermore, the influence of the phase shift between the output voltage and current, and the influence of the junction capacitances of the power switches are analyzed in detail. Finally, a 1-kW prototype has been simulated and tested to verify the theoretical a nalysis of this paper.

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19 Power Quality Improvement by using loop control Method in a Three Phase Four Wire System
P Pavan kumar, Dr.T.Rajasekar

Abstract-Cascaded current–voltage control strategy is proposed for inverters to simultaneously improve the power quality of the inverter local load voltage and the current exchanged with the grid. It also enables seamless transfer of the operation mode from stand-alone to gridconnected or vice versa. The control scheme includes an inner voltage loop and an outer current loop, with both controllers designed using the H∞ repetitive control strategy. This leads to a very low total harmonic distortion in both the inverter local load voltage and the current exchanged with the grid at the same time. The proposed control strategy can be used to single-phase inverters and three-phase four-wire inverters. It enables grid connected inverters to inject balanced clean currents to the grid even when the local loads (if any) are unbalanced and/or nonlinear. Simulation under different scenarios, with comparisons made to the current repetitive controller replaced with a current proportional–resonant controller, is presented to demonstrate the excellent performance of the proposed strategy.

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20 Improvement Power Quality in DFIG Wind Turbine System using GSC and RSC Control system
B.Pushpa latha, Dr.T.Rajasekar

Abstract-Doubly fed induction generators' grid side converter control strategy is proposed. The focus is made on the performance characteristics of DFIG under grid voltage fluctuation. The control strategy is made to satisfy grid codes such as grid stability, fault ride through, power quality improvement, grid synchronization and power control etc . DFIG system uses back-to-back converters in the rotor circuits to meet the necessary requirements. Doubly-fed Induction Generator is the most common rotator machine which is used on the grid connected wind energy conversion system for the fulfillment of the system requirement such as grid stability, fault ride through, power quality improvement, and grid synchronization and power control etc. So in order to improve the operation capacity of wind turbine under critical situation, the intensive study of both machine side converter control and grid side converter control is necessary. The machine uses two back-to-back converters. The grid side converter is modeled to control the active and reactive power independently along with dc-link voltage. This scheme allows wind turbines to remain synchronized to the grid during faults or during voltage sags and swings. The proposed control strategy is confirmed with simulation results in MATLAB/SIMULINK.

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21 Power Electronic converter with Bi-directional power flow Interface for EV, HEV, and PHEV Applications
B.Ramesh, K.Sujesh

Abstract- This focuses on a universal power electronic interface that can be utilized in any type of the electric vehicles, hybrid electric vehicles, and plug-in hybrid electric vehicles (PHEVs). Basically, the proposed converter interfaces the energy storage de-vice of the vehicle with the motor drive and the external charger, in case of PHEVs. The proposed converter is capable of operating in all directions in buck or boost modes with a non inverted out-put voltage (positive output voltage with respect to the input) and bidirectional power flow.

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22 FB-TPC implementation in Renewable Power Systems for wide range voltage Applications
G.Ramya, K.Sujesh

Abstract-A Three Port Converter (TPC), which can interface with renewable sources, storage elements and loads simultaneously, is a good candidate for the solar power systems. My aim is to produce constant output power in all times (day & night). So we used three port full bridge converters in solar electrical energy. A systematic method for generating Three Port Converter topologies from Full Bridge Converters are described here. By using this systematic method, a novel full-bridge TPC (FB-TPC) is developed for renewable power system applications which feature simple topologies and control, a reduced number of devices and single-stage power conversion between any two of the three ports. This method splits the two switching legs of the FBC into two switching cells with different sources and allows a dc bias current in the transformer. The FB-TPC consists of two bidirectional ports and an isolated output port. The primary circuit of the converter functions as a buck-boost converter and provides a power flow path between the ports on the primary side, while the third port provides the power balance in the system ports. The full bridge three port converter is designed.

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23 EElimination of harmonics in Cascaded H-Bridge Multilevel Inverter using DSTATCOM
D.Sevya, CH.Venktesh

Abstract-An investigation of five-Level Cascaded H – bridge (CHB) Inverter as Distribution Static Compensator (DSTATCOM) in Power System (PS) for compensation of reactive power and harmonics. The advantages of CHB inverter are low harmonic distortion, reduced number of switches and suppression of switching losses. The DSTATCOM helps to improve the power factor and eliminate the Total Harmonics Distortion (THD) drawn from a Non- Liner Diode Rectifier Load (NLDRL). The D-Q reference frame theory is used to generate the reference compensating currents for DSTATCOM while Proportional and Integral (PI) control is used for capacitor dc voltage regulation. A CHB Inverter is considered for shunt compensation of a 11 kV distribution system. Finally a level shifted PWM (LSPWM) and phase shifted PWM (PSPWM) techniques are adopted to investigate the performance of CHB Inverter. The results are obtained through Mat lab / Simulink software package.

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24 Implementation of Single-Phase Isolated Converter with DC active filter for Ripple Current Reduction in fuel cell
Are.Soddulu, K.Sujesh

Abstract-In this proposed novel technique in which reduction in ripple current can bé achieved without increasing switching elements. We considered current ripple which has twice frequency component is generated in the dc portion when suitable PWM inverter is used for grid purpose since ripple current shortens life span of electrolytic capacitors, batteries and fuel calls. The circuit realizes dc active filter without increasing count of switching elements due to buffer capacitor is connected to center tap of isolation transformer. We observed that results are verified with Matlab /Simulink.

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25 DC Link Voltage Regulation in Permanent Magnet Synchronous Motor for EV and HEV Applications
B.Venu, P.Srikanth

Abstract-In this integrated circuit allows the permanent magnet based drive is opted to operate in motor mode or acts as boost inductors of the boost converter, and thereby boosting the output torque coupled to the same transmission system or dc-link voltage of the inverter connected to the output of the integrated circuit. Motor control algorithm for a dual power split system is proposed for hybrid electric vehicles (HEV). The proposed control technique is to use interleaved control to significantly reduce the current ripple and thereby reducing the losses and thermal stress under heavy-load condition. In order to evaluate performance of the control algorithm, HEV simulator is developed using MATLAB/Simulink. Finally proposed converter fed PMSM drive with closed loop operation is presented. Matlab/Simulink model is developed.

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26 Improvement of Power Quality in Grid Interconnection of renewable Energy System Based Distribution power System
Venugopalachary .K, CH.Venkatesh

Abstract-In this a grid interfacing inverter that compensates power quality problems and it can also interface renewable energy sources with the electric grid. The grid interfacing inverter can effectively be utilized to perform following functions: 1) transfer of active power harvested from the renewable resources; 2) load reactive power demand support; 3) current harmonic compensation at PCC; and 4) current unbalance and neutral current compensation in case of 3-phase 4-wire system. The ability of fuzzy logic to handle rough and unpredictable real world data made it suitable for a wide variety of applications, especially, when the models or processes are too complex to be analyzed by classical methods. In this paper fuzzy logic controller is used for controlling the DC capacitor voltage. Simulations using MATLAB / SIMULINK are carried out to verify the performance of the proposed controller. The results show that the proposed controller has fast dynamic response, high accuracy of tracking the DC-voltage reference, and strong robustness to load parameters variation.

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