Search or ask a question

When voltage increases tap increase or decrease in oltc ieee?

Constant power circuit

Voltage optimisation

Voltage regulation

Best insight from top research papers

In an On-Load Tap Changer (OLTC) system, the action of the tap changer in response to voltage changes depends on the specific scenario. When the OLTC ratio increases, the P max - Φ and V cr - Φ curves shift upward, indicating that the tap changer adjusts to increase the voltage levels . Conversely, the OLTC may decrease the voltage levels when the transformation ratio decreases, as evidenced by the downward shift in the curves . The effect of OLTC on voltage stability is complex, with different load types showing varying responses. For instance, with constant impedance or current loads, increasing the changer ratio can lead to lower primary voltages and power imbalances, while constant power loads exhibit minimal voltage changes with tap operations . Overall, OLTC adjustments can either increase or decrease voltage levels based on the system's characteristics and load types.

Answers from top 4 papers

PDF

Open Access

More filters

Papers (4)	Insight
Proceedings Article•DOI Effect of on-load tap changer on voltage stability of power systems with nonlinear load Jianyong Li, Yanhong Liu, Lijun Zhang - Show less +2 more 10 Jun 2011 2 Citations	When voltage increases, the tap of the on-load tap changer (OLTC) increases, as shown in the analysis of voltage stability in power systems with nonlinear loads.
Proceedings Article•DOI The Effect of OLTC on Static Voltage Stability Limit Jundong Duan, Shanshan Zhu - Show less +1 more 25 Mar 2011 7 Citations	When voltage increases, the tap on the On-Load Tap Changer (OLTC) decreases according to the analysis in the paper on static voltage stability limits.
Open access Dynamic Simulation of Voltage Stability Affected by OLTC Zhou Shuang-xi 01 Jan 2006 3 Citations	When voltage increases, the tap on the On-Load Tap Changer (OLTC) may decrease to regulate the voltage, as discussed in the dynamic simulation of voltage stability affected by OLTC in IEEE.
Proceedings Article•DOI Voltage stability affected by on-load tap changer considering excitation reactance of induction motor Liang Wang, Yutian Liu, Zhaowen Luan - Show less +2 more 01 May 2005 6 Citations	In the IEEE paper, the effect of OLTC tap changes on voltage stability is complex; tap adjustment can increase or decrease depending on the power transfer limit trend.

My columns

Related Questions

What are the technologies to detect high voltage without contact?5 answersVarious technologies have been developed to detect high voltage without direct contact. One approach involves using a non-contact active DC high voltage detector that can measure and display voltages generated in capacitors, enabling the calculation of discharged electric charges. Another method focuses on non-contact diagnostics of high-voltage insulators, utilizing partial discharge detection through electromagnetic, acoustic, and electro-optical sensors for remote monitoring and diagnosis of insulator conditions. Additionally, a non-contact voltage detector based on microelectromechanical systems (MEMS) technology has been proposed, setting a detection threshold to effectively identify powered conductors from a distance, particularly useful for UHV transmission lines. These technologies offer safe and efficient ways to detect high voltage without the need for direct contact.

When voltage increases what about the leakage current in NCFET?5 answersWhen voltage increases in Negative Capacitance Field-Effect Transistors (NCFETs), the leakage current can either increase or decrease depending on the specific technology. In traditional CMOS technology, the leakage power typically decreases as voltage scales down. However, in NCFET technology with a thick ferroelectric layer, the leakage power can actually increase due to the negative Drain-Induced Barrier Lowering (DIBL) effect. This unique behavior of NCFETs challenges existing power management techniques and necessitates the development of NCFET-aware dynamic voltage scaling strategies to optimize energy efficiency while maintaining performance requirements. Therefore, in NCFETs, the relationship between voltage and leakage current is complex and requires specialized approaches for efficient power management.

Can we switch on AC during low voltage?9 answers

How can I increase the voltage of my cell phone?7 answers

How much voltage can Arduino read?7 answers

What does OL mean on a voltage meter?9 answers

See what other people are reading

What is microgrid control architectures?

Microgrid control architectures refer to the hierarchical structures designed to manage the operation of microgrids efficiently. These architectures typically consist of multiple layers such as steady-state control and dynamic control layers. Various control strategies like decentralized, centralized, and distributed control are employed for overall system control and communication purposes. Decentralized control utilizes adaptive control with droop coefficients, while centralized control involves a digital communication network connecting source and load controllers. Distributed control employs local controls for voltage and current regulation, enhancing output current sharing. The integration of intermittent renewable energy sources in microgrids poses challenges, necessitating advanced control strategies like Hierarchical Control (HC) with main, secondary, and tertiary levels. These control architectures aim to ensure stability, reliability, and efficient operation of microgrid systems under varying conditions.What are the most effective methodologies for integrating renewable energy sources into existing power grids?

Integrating renewable energy sources (RES) into existing power grids effectively requires a multifaceted approach, addressing both technical and operational challenges. One effective methodology involves the use of three-phase Voltage Source Converters (VSCs), which offer superior performance in weak AC grids by correctly detecting grid voltage signals during distortion and unbalance conditions. This approach leverages power synchronization for grid integration, ensuring stability even under weak grid conditions. Additionally, comprehensive studies using software like DIgSILENT PowerFactory have been instrumental in assessing the reliability, energy adequacy, and harmonic analysis of RES integration, providing a detailed simulation analysis framework. The evaluation of ancillary services, specifically rotational inertia and system strength, is crucial for maintaining grid stability with high RES penetration. By integrating wind power plants into standard test systems, researchers have been able to quantify these services and their impact on stability indices, facilitating the development of secure integration requirements. Moreover, the implementation of advanced inverter control schemes, such as synchronous reference frame theory (SRFT) and fuzzy logic control (FLC), has proven effective in mitigating power quality issues associated with grid-integrated solar PV systems. For the integration of DC power from RES into AC networks, semiconductor network inverters, including both string circuits and microinverters, play a pivotal role. These technologies enable effective voltage regulation and efficient power distribution, despite their respective maintenance and reliability trade-offs. Furthermore, modeling and simulation techniques, including AI and mathematical approaches, are essential for understanding the fluctuations and uncertainties introduced by RES, thereby supporting the development of robust grid monitoring and management strategies. Lastly, online simulation and evaluation analysis technology offer valuable insights into transient frequency stability, enabling real-time assessment of grid performance under renewable integration scenarios. Together, these methodologies form a comprehensive strategy for integrating renewable energy sources into existing power grids effectively.How do margin calls work in forex trading, and what role do pip movements play in determining these calls?

Margin calls in forex trading are triggered when a trader's account equity falls below the required margin level, leading to a demand for additional funds to cover potential losses. Pip movements, which represent the smallest price change that a given exchange rate can make, play a crucial role in determining margin calls. Significant pip movements can quickly erode a trader's account equity, increasing the likelihood of a margin call being issued. In the event of margin calls, traders may be forced to sell assets at unfavorable prices to meet margin requirements, potentially exacerbating market volatility. This process highlights the importance of monitoring pip movements and managing margin levels effectively to avoid margin calls and mitigate risks in forex trading.What is the gap in literature in the field of hydrogen-batteries-supercapacitor based hybrid energy storage systems in electrical microgrids?

The existing literature on hydrogen-battery-supercapacitor hybrid energy storage systems in electrical microgrids lacks comprehensive research on optimal sizing frameworks for coordinating different timescales. While studies have explored the benefits of hybridizing energy storage systems to enhance power management and reliability, there is a gap in addressing the computational complexity arising from the coupling of various timescales. Additionally, the integration of power electronics with fuel cell technology remains a challenge in seamlessly converting renewable energy into electricity. Future research could focus on developing efficient sizing methodologies and innovative control strategies to overcome these limitations and further enhance the performance and integration of hydrogen-battery-supercapacitor hybrid energy storage systems in electrical microgrids.Explain increased control over secondary distribution?

Increased control over secondary distribution is crucial for modern power systems due to the growing complexity of distributed energy resources. Various strategies have been proposed to enhance secondary control, such as utilizing advanced control methods like droop control and communication-based secondary control. These methods aim to improve power sharing accuracy, stabilize voltage levels, and ensure efficient energy management. Additionally, the integration of innovative technologies like In-Line Power Regulators (IPR) and Secondary VAr Controllers (SVC) further enhances control capabilities by managing grid operations at the secondary level and dynamically injecting VArs to control voltage fluctuations. By implementing these advanced control strategies, power systems can achieve better stability, increased efficiency, and effective management of distributed energy resources.What is the protection system in power grids.?

Protection systems in power grids play a crucial role in safeguarding the integrity and stability of the grid against cyber-attacks and faults. Various vulnerabilities exist in protection systems, such as those in substations, Communication-Assisted Protection (CAP) schemes, and Wide-Area Protection (WAP) schemes. The development of High Voltage Direct Current (HVDC) technology, particularly Multi-terminal HVDC grids based on Voltage Source Converters (VSC) like Modular Multilevel Converters (MMC), poses challenges in protection strategies. These systems require fault identification, interruption methods, and Fault-Ride-Through (FRT) capability under DC fault conditions. Specific components like Line Current Differential Relays (LCDRs) are vulnerable to cyber-attacks, emphasizing the need for advanced security measures, including Machine Learning (ML)-based and model-based methods for protection. Additionally, the smart grid implements information security protection models to secure operational data and equipment against various risks, enhancing overall security levels.Why capcut is popular as video generator?

CapCap is popular as a video generator due to its innovative approach in engaging players to transcribe short video segments against a countdown timer, enhancing listening and speaking skills. Unlike traditional systems, CapCap utilizes a human computation algorithm that gathers input from non-experts sequentially and in parallel, fostering community identification and skill diversity. The game incentivizes players through indirect feedback and team support rather than monetary rewards, making it engaging and entertaining. This unique approach has shown promising results in improving the Word Error Rate (WER) of English captions over Automatic Speech Recognition (ASR) output, particularly beneficial for non-native English speakers.What are the half duplex communication system application?

Half-duplex communication systems find applications in various fields. They are utilized in communication methods for buses, where devices resend data packets at different evasive times to avoid collisions. Additionally, in wireless communications, duplex antennas enable simultaneous signal transmission and reception, enhancing spectral efficiency through techniques like decoupling networks and dual polarization. Moreover, half-duplex transceivers use microprocessors and current sensors to transmit and receive data alternately, improving communication efficiency. Furthermore, communication servers and VOIP solutions can detect half-duplex sources like LMR systems and adjust operation modes accordingly, supporting both half-duplex and full-duplex functionalities based on the data source. These diverse applications showcase the versatility and importance of half-duplex communication systems in modern communication technologies.What is the objective of power factor correction and voltage stability?

The objective of power factor correction is to improve the efficiency of electrical systems by reducing the circulation of ineffective currents, especially in the presence of inductive loads, through the use of reactive devices. Additionally, power factor correction aims to enhance voltage stability and power quality in renewable energy-powered grids. Voltage stability is crucial in systems with high penetration of photovoltaic energy, where Power Factor Correction (PFC) techniques play a vital role in stabilizing output voltage responses. Implementing control schemes like the Electric Spring technology can further enhance power factor correction, voltage support, and current balance in microgrids, ensuring improved power quality and stability.Long studies with large-scale solar panel grid installations?

Longitudinal studies focusing on large-scale solar panel grid installations have highlighted several critical aspects, including technical challenges, system modeling, power quality issues, and control strategies to ensure grid stability and efficiency. High penetrations of photovoltaic (PV) systems within distribution grids introduce technical challenges such as voltage rise due to reverse power flow, necessitating new strategies and models to address these challenges effectively. The integration of large-scale PV systems into existing electrical networks requires careful consideration of location, sizing, and penetration levels to optimize network performance and mitigate adverse effects such as voltage instability and network losses. Feasibility studies, such as the design of a 300 kW grid-connected PV system, underscore the importance of renewable energy sources in reducing carbon dioxide emissions and highlight the potential of PV systems to contribute significantly to energy sustainability goals. Moreover, grid-connected solar PV units must now meet requirements like fault ride-through and voltage support through reactive power injection during faults, ensuring dynamic grid support and stability. Large-scale PV plants must also address power quality problems, including voltage fluctuation and harmonic output, to meet steady-state and transient operation characteristics. The integration of PV into the grid can cause power quality issues, such as harmonic injection and low power factor, which worsen with increased PV penetration. Control strategies for PV grid power generation systems are crucial for managing the effects of power fluctuations and ensuring effective frequency modulation and voltage stability. Dynamic interactions between PV systems and the grid necessitate precise and effective control methods to provide grid support services and manage energy transfer efficiently. Finally, detailed simulation studies of dynamic characteristics of PV cells, DC bus, and converters are essential for understanding the impact of PV generation on power systems and facilitating the integration of large-scale PV systems.Qualitative long studies with large-scale solar panel grid installations?

Qualitative long-term studies on large-scale solar panel grid installations have highlighted several critical aspects and challenges that need addressing to ensure the successful integration and operation of these systems within existing electrical networks. The rapid proliferation of grid-connected photovoltaic (PV) systems, driven by increasing government support and decreasing installation prices, has introduced harmonic pollution due to the use of power electronic converters, necessitating thorough harmonic analysis to minimize their impact on distribution systems. High penetrations of PV systems within distribution grids have led to technical challenges such as voltage rise, reverse power flow, and the need for new equivalent models of distribution grids to accommodate the unique behaviors of these systems. The location and sizing of PV systems significantly affect the performance of existing networks, with considerations for voltage level, line loading, network losses, and voltage stability being paramount for optimizing network performance. The fault ride-through capability and voltage support function through reactive power injection during faults have been identified as essential for dynamic grid support, aligning with recent technical guidelines for PV connections to the MV grid. Large-scale PV plants must meet steady-state characteristics and address power quality problems, including voltage fluctuation and harmonic output, to ensure grid stability. The instability and poor regulation of solar PV power, influenced by weather and geographical factors, pose risks to grid security, stability, and power quality, necessitating advanced grid-connected inverter technologies and power management strategies. Projects focusing on solving technical problems related to PV system output, harmonics, and islanding operation have been initiated, with continuous monitoring of grid-connected PV systems with batteries installed at residences. Feasibility studies on large-scale solar PV systems have also been conducted, analyzing payback times and the environmental impact of reducing carbon-dioxide emissions through renewable energy sources. Finally, scholarship-funded studies on solar energy in Europe have contributed to the body of knowledge on PV system integration and performance.