- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Embedded System for Lighting Control of LED Light Source Applied to Therapy of Radiofrequency Ablation in Hepatocellular Carcinoma
摘要： This paper presents a distributed, massively parallel architecture that enables tractable transmission and distribution locational marginal price (T&DLMP) discovery along with optimal scheduling of centralized generation, decentralized conventional and flexible loads, and distributed energy resources (DERs).
关键词： proximal message passing (PMP),Distributed power market clearing,reserve pricing,distribution network locational marginal prices (DLMP),reactive power pricing
更新于2025-09-19 17:13:59
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[IEEE 2019 Chinese Automation Congress (CAC) - Hangzhou, China (2019.11.22-2019.11.24)] 2019 Chinese Automation Congress (CAC) - Research on Reactive Power Optimization Control Strategy of Distribution Network with Photovoltaic Generation
摘要： What the thesis studies is the active and reactive decoupling control method of photovoltaic grid-connected inverter, and then the reactive power of grid-connected inverter is optimized by genetic algorithm with the objective of minimizing network loss, So as to realize reactive power optimization control of the photovoltaic power generation system.An algorithm based on genetic algorithm for reactive power optimization of photovoltaic power generation and distribution network is proposed.A mathematical model for reactive power optimization of distribution network has been established. The mathematical model those of photovoltaic power generation system Considering the limits of not only minimum network loss but also node voltage, what is used to optimize the reactive power of photovoltaic power generation is genetic algorithm. The example simulation results indicate the designed optimization algorithm is effective and correct in reducing power loss and improving voltage quality.
关键词： Photovoltaic power generation,Grid-connected inverter,Genetic algorithm,Reactive power optimization
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Correlating the Hot Spots and Power Degradation seen in crystalline silicon modules in All India Survey of PV Module Reliability 2018
摘要： This paper presents a distributed, massively parallel architecture that enables tractable transmission and distribution locational marginal price (T&DLMP) discovery along with optimal scheduling of centralized generation, decentralized conventional and flexible loads, and distributed energy resources (DERs).
关键词： proximal message passing (PMP),Distributed power market clearing,reserve pricing,distribution network locational marginal prices (DLMP),reactive power pricing
更新于2025-09-19 17:13:59
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[IEEE 2019 International Conference on Electrical and Computing Technologies and Applications (ICECTA) - Ras Al Khaimah, United Arab Emirates (2019.11.19-2019.11.21)] 2019 International Conference on Electrical and Computing Technologies and Applications (ICECTA) - Controlled Reactive Power Supplied to Grid by Photovoltaic Connected
摘要： in the upcoming years, photovoltaic systems are predicted to be one of the main sources of electricity, the amount of installed photovoltaic power has rapidly increased. But using photovoltaic systems connected to grid may have drawback effect on the grid parameters. with using more and more photovoltaic panel energy its necessary to investigate them into the power systems, because small residential loads using photovoltaic at maximum power as the main source of the power and the utility use as a backup source interfaced with inverter and this change the characteristics of power flow shape and effect the parameter of the grid, this paper will focus on increase reactive power problem and discuss the ability of solution by control of reactive power and active power of photovoltaic inverter output to improve the efficiency of the grid.
关键词： Inverter control,Connected to Grid,Photovoltaic,Reactive power
更新于2025-09-19 17:13:59
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Optimized reactive power support strategy for photovoltaic inverter to intensify the dynamic voltage stability of islanded microgrid
摘要： This study presents an innovative and optimized reactive power support (ORPS) strategy for photovoltaic (PV) inverters to improve the dynamic voltage stability (DVS) of islanded microgrid (MG) with induction motor (IM) load. On the occurrence of the fault, voltage instability (VI) happens due to the low-inertia IM load and poor ride through capability of PV inverters of MG. Supplement of optimal RPS promptly, without exceeding the rated current value of the inverter, is aimed at the proposed control, to maintain DVS during severe voltage downfall as a result of a fault. Once the profiled voltage value is restored and the necessity of RPS is fulfilled, the PV inverter returns to its prefault power production combination. The detailed model of an inverter-based islanded MG with IM load is built to examine the DVS, and the theoretical analysis and technical discussion are conducted. A comparison between the conventional and proposed strategies is carried out. From the demonstrated results, employing the proposed ORPS control can provide RPS effectively and helps to improve the DVS. This proposed strategy can also provide an equivalent service as an expensive 610-kVA dynamic volt-ampere reactive support device (ie, D-STATCOM) in the studied MG.
关键词： PV inverter,dynamic voltage stability,reactive power support strategy,islanded MG
更新于2025-09-19 17:13:59
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[IEEE 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring) - Rome, Italy (2019.6.17-2019.6.20)] 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring) - Fields and Modes in Thin Film Coated Optical Waveguides
摘要： The paper presents a modularized control strategy of doubly fed induction generator (DFIG) system, including the grid-side converter (GSC) and rotor-side converter (RSC), under unbalanced and harmonic grid voltage. The sequence decomposition process and complicated control reference calculation can be avoided in the proposed control strategy. From the perspective of power grid friendly operation, the control targets of DFIG system in this paper are chosen as: 1) smooth active and reactive power injected into the power grid; 2) balanced and sinusoidal current injected into the power grid. The RSC and GSC can work as two independent modules and the communication between RSC and GSC can be removed. Furthermore, the third harmonic current component, dc-link voltage fluctuation, and electromagnetic torque pulsation under the different control targets are theoretically analyzed. Finally, the availability of the proposed modularized control strategy of DFIG system under unbalanced and distorted grid voltage is verified by experiment results.
关键词： unbalanced and harmonic grid voltage,modularized control,doubly fed induction generator (DFIG) system,smooth active and reactive power,Balanced and sinusoidal current
更新于2025-09-19 17:13:59
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Coordinated reactive power strategy using static synchronous compensator for photovoltaic inverters
摘要： Large photovoltaic (PV) penetrations into the electric grid resulted in new challenges such as reverse power flow and violation of voltage profile. The traditional methods for voltage regulation in a grid-connected PV system are hardly adaptable to these changes as they only contain the local information which is used without the knowledge of how the control action affects the overall system. To address this problem, this paper extends the reactive power control capability of solar PV inverters by combining them with static power electronic devices for regulating voltage during grid faults. For efficient identification of grid faults, a support vector machine-based fault classification mechanism is developed. The proposed method prioritizes the reactive power control using PV inverter by adapting a predefined hierarchical control structure. The complete methodology is realized by testing it with a two-stage single-phase grid-connected PV system. The experimental results verify the accuracy of the classification algorithm and depict the effectiveness of the proposed controller in both under and overvoltage situations.
关键词： fault ride through (FRT),reactive power control,islanding classification,grid-connected photovoltaic system (GCPVS)
更新于2025-09-19 17:13:59
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[IEEE 2019 Photonics North (PN) - Quebec City, QC, Canada (2019.5.21-2019.5.23)] 2019 Photonics North (PN) - Optical Parametric Oscillator Based Differential Absorption Lidar for Tropospheric Methane Concentration Measurement
摘要： If there is no reactive power exchange between a doubly fed induction generator (DFIG) and a grid, the various characteristics of the power converters in a DFIG wind turbine system cause the lifetime expectancy of a rotor-side converter (RSC) to be significantly less than that of a grid-side converter (GSC). In order to fulfill modern grid codes, over-excited reactive power injection will further reduce the lifetime of the RSC. In this paper, the additional stress of a power semiconductor due to the reactive power injection is first evaluated in terms of a modulation index and the current loading. Then, an optimized reactive power flow is proposed in the case where an over-excited reactive power support is applied with the joint compensation from both the RSC and the GSC. Finally, some experimental validations are performed at a downscale DFIG prototype. It is concluded that, among the different combined reactive power support strategies, the best scheme will tradeoff the lifetime between the GSC and the RSC.
关键词： thermal behavior,Consumed lifetime,reactive power,doubly fed induction generator (DFIG)
更新于2025-09-19 17:13:59
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A review on voltage control for distribution systems with large-scale distributed photovoltaic power integration
摘要： In order to solve the problems of voltage wide-range fluctuations and over-limitation after large-scale distributed photovoltaic (DPV) integrated into distribution networks, this paper conducts a comprehensive and detailed analysis of voltage control strategy by summarizing existing voltage control technology and experience at home and abroad. The technical points and a comprehensive comparison from the perspectives of active power curtailment (APC), reactive power control (RPC) and active-reactive power coordination control (A/RC) are made. Through comparative analysis, it is found that adopting active-reactive power coordination control is a key measure to effectively improve voltage quality and increase the PV hosting capacity of distribution networks. The optimization of the control strategy can effectively improve the friendliness of large-scale PV system integration. The method and control strategy can provide a theoretical basis and practical reference for voltage management of distribution networks with high penetration PV integration.
关键词： reactive power control,active-reactive power coordination control,distributed photovoltaic power,voltage control,active power curtailment,distribution systems
更新于2025-09-16 10:30:52
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[IEEE 2019 International Conference on Power, Energy and Innovations (ICPEI) - Pattaya, Chonburi, Thailand (2019.10.16-2019.10.18)] 2019 International Conference on Power, Energy and Innovations (ICPEI) - The control of large scale grid-tied photovoltaic rooftop systems to avoid the power factor charge
摘要： Large scale grid-tied photovoltaic (PV) rooftop systems are encouraged to install in many commercial buildings with the aim to saving the electricity energy bills. However, the support from PV system normally reduces only real power consumption while the use of reactive power is unchanged. In consequent, the power factor at the point of common coupling (PCC) may drop below the utility’s prescribed value, causing the increase of power factor charge in the energy bill. The power factor correction by controlling reactive power supplied by PV rooftop system is presented in this work. The performances of this proposed control method are examined based on time-sweep load flow calculations on DIgSILENT PowerFactory software. The simulation results show that the reactive power compensation by PV interfaced converter, with smart control algorithm, can improve the power factor at the PCC effectively, without adding new compensation devices.
关键词： Grid-tied inverter control,photovoltaic rooftop system,power factor charge,power factor correction,reactive power compensation
更新于2025-09-16 10:30:52