Electric spring for power quality improvement

Yan, Shijie; Tan, Siew‐Chong; Lee, C. K.; Hui, S. Y. Ron

doi:10.1109/apec.2014.6803602

Cited by 53 publications

(29 citation statements)

References 19 publications

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“…Unlike STATCOM, Static Var Compensation (SVC) and UPFC technologies which handle pure reactive power only [10][11][12][13][14][15], the electric spring is a new smart-grid device that can compensate both reactive power and active (the energy storing devices like batteries are required [16]) [3,9]. In Fig.3, (a) and (b) show two versions of ES respectively [3,7,16,18] ES of version B is a modified version which is achievable by replacing the DC link capacitors with batteries (or connecting the batteries across the capacitors). As compared with version A, version B can generate a voltage with phase angle from 0° to 360° relative to the phase angle of the non-critical load current, thereby allowing both real and reactive powers to be exchanged [6].…”

Section: Strategies Of Statcom and Esmentioning

confidence: 97%

“…Besides, it can be perceived equivalently as a decentralized type of series reactive power compensators which has the power factor correction features. Above all, ES achieves voltage stability in grids with renewable sources through input voltage control and power quality improvement through input current control at the low voltage distribution level [7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A general comparative analysis of static synchronous compensator and electric spring

Che

Wei

Huo

et al. 2014

2014 IEEE Conference and Expo Transportation Electrification Asia-Pacific (ITEC Asia-Pacific)

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With the nonlinear and unbalanced loads and high penetration of distributed generations connected into the power distribution network, some deteriorative influences such as poor power quality and stability issues have been caused. Static synchronous compensator (STATCOM) and another custom power device, electric spring (ES) are competent for solving these problems. This paper provides a general comparative analysis of STATCOM and ES on fundamental principles, control strategies and power quality improvement functions including reactive power compensation capacities and voltage regulation capabilities. Necessary mathematical derivations supporting the theoretical framework of the principle and the final conclusion are detailed in the paper.

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Section: Strategies Of Statcom and Esmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

A general comparative analysis of static synchronous compensator and electric spring

Che

Wei

Huo

et al. 2014

2014 IEEE Conference and Expo Transportation Electrification Asia-Pacific (ITEC Asia-Pacific)

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show abstract

“…Since the initial proof-of-concept using a SL with a ES, a number of papers have been published on this topic focusing on dynamic modeling [21], performance analysis [22], [23] and control [24], [25] of ES for voltage regulation and power quality improvement [26] only including a comparison of voltage control using ES against static compensator (STATCOM) [27]. In particular, the results in [27] suggest that the use of SLs has the potential of using only a fraction of the total reactive power required by a STATCOM to achieve similar or better voltage regulation than a STATCOM in the distribution network.…”

Section: Introductionmentioning

confidence: 99%

Primary Frequency Control Contribution From Smart Loads Using Reactive Compensation

Akhtar

Chaudhuri

Hui

2015

IEEE Trans. Smart Grid

108

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Frequency-dependent loads inherently contribute to primary frequency response. This paper describes additional contribution to primary frequency control based on voltagedependent noncritical (NC) loads that can tolerate a wide variation of supply voltage. By using a series of reactive compensators to decouple the NC load from the mains to form a smart load (SL), the voltage, and hence the active power of the NC load, can be controlled to regulate the mains frequency. The scope of this paper focuses primarily on reactive compensators for which only the magnitude of the injected voltage could be controlled while maintaining the quadrature relationship between the current and voltage. New control guidelines are suggested. The effectiveness of the SLs in improving mains frequency regulation without considering frequency-dependent loads and with little relaxation in mains voltage tolerance is demonstrated in a case study on the IEEE 37 bus test distribution network. Sensitivity analysis is included to show the effectiveness and limitations of SLs for varying load power factors, proportion of SLs, and system strengths.Index Terms-Demand response (DR), demand-side management (DSM), electric spring (ES), primary frequency control, reactive compensator, smart load (SL), voltage control.

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“…Advantage of TLBO is that it does not require any algorithm parameters for execution. Tuning of PI controllers with TLBO algorithm has been extensively applied in the last 7 years in diverse fields [6]- [12].…”

Section: Introductionmentioning

confidence: 99%

Adaptive PI control of Electric Springs For Voltage Regulation Under Dynamic Load Changes

Deepika¹,

Kumar²,

Rao³

et al. 2019

IJITEE

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Due to continuous distributed generation development technology, the accessibility of wind, solar and also the renewable energy sources tends to intensify. To suppress the voltage fluctuation caused by the distributed generation electric springs had been developed. In this article an adaptive control of Electric spring is proposed, in which the gains of the PI controller are optimised by TLBO to maintain constant voltage across critical load. The proposed strategy is tested for dynamic changes in the non-critical load. Simulation results show that, for voltage fluctuations caused by the DGs and also with the dynamic load changes, ES with adaptive controller stabilize the bus voltage effectively, over ES with Fuzzy Logic Control and traditional PI control.

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Electric spring for power quality improvement

Cited by 53 publications

References 19 publications

A general comparative analysis of static synchronous compensator and electric spring

A general comparative analysis of static synchronous compensator and electric spring

Primary Frequency Control Contribution From Smart Loads Using Reactive Compensation

Adaptive PI control of Electric Springs For Voltage Regulation Under Dynamic Load Changes

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