On Coordinated Control of OLTC and Reactive Power Compensation for Voltage Regulation in Distribution Systems With Wind Power

Salih, Shemsedin Nursebo; Chen, Peiyuan

doi:10.1109/tpwrs.2015.2501433

Cited by 88 publications

(46 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is because loads are not consistently distributed along the feeders, and hence, unless some real measurements are used, state estimation in distribution networks will be inaccurate . In addition, although the strategy in Salih and Chen provided the ability to reduce embedded generator active power generation when set voltage limits cannot be maintained, it did not provide the ability to increase the active power of the embedded generator when conditions change.…”

Section: Introductionmentioning

confidence: 99%

Voltage regulation system for OLTC in distribution power systems with high penetration level of embedded generation

Hasan

Tshivhase

2019

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Summary In this paper, a voltage regulation system is proposed that improves the voltage regulation process in power distribution networks with a high penetration of embedded generation. The principle of the proposed system is to alter the existing and conventional substation busbar monitoring technique of the on‐load tap changer (OLTC) commonly implemented in medium voltage power distribution networks. The system alternatively uses measured multiple voltage magnitudes on different vital locations on the power distribution network, it thereafter isolates the uppermost and the lowermost measured voltage magnitudes from all voltage inputs received. The sampled uppermost and lowermost voltage magnitudes are compared with predetermined set voltage limits, and the OLTC will change its tap settings to keep the uppermost and lowermost voltage magnitudes within the set voltage limits. To avoid tap hunting when set voltage limits cannot be maintained, the system will reduce the active power generated by the embedded generator to a predetermined value. On the other hand, the system will monitor the load on the feeder in which the embedded generator is connected and then increase the embedded generator active power generation again when the load start increasing. The proposed voltage regulation system was tested on a typical South African power distribution network consisting of a substation with an OLTC equipped power transformer that is simultaneously regulating voltage of three medium voltage feeders. The voltage regulation system managed successfully to keep feeder's voltages within the acceptable limits.

show abstract

Section: Introductionmentioning

confidence: 99%

Voltage regulation system for OLTC in distribution power systems with high penetration level of embedded generation

Hasan

Tshivhase

2019

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

show abstract

“…Generally, in traditional AC distribution networks, voltage profiles are maintained through controlling on-load-tap-change transformers [1], shunt capacitors [2] and circuit breakers [3]. In a hybrid AC/DC distribution network, coordinated regulations of converter-based controllable devices are highly demanded for voltage control.…”

Section: Introductionmentioning

confidence: 99%

Coordinated voltage regulation of hybrid AC/DC medium voltage distribution networks

Chen

Shen

et al. 2017

J. Mod. Power Syst. Clean Energy

View full text Add to dashboard Cite

In a hybrid AC/DC medium voltage distribution network, distributed generations (DGs), energy storage systems (ESSs), and the voltage source converters (VSCs) between AC and DC lines, have the ability to regulate node voltages in real-time. However, the voltage regulation abilities of above devices are limited by their ratings. And the voltage regulation efficiencies of these devices are also different. Besides, due to high r/x ratio, node voltages are influenced by both real and reactive power. In order to achieve the coordinated voltage regulation in a hybrid AC/ DC distribution network, a priority-based real-time control strategy is proposed based on the voltage control effect of real and reactive power adjustment. The equivalence of real and reactive power adjustment on voltage control is considered in control area partition optimization, in which regulation efficiency and capability are taken as objectives. In order to accommodate more DGs, the coordination of controllable devices is achieved according to voltage sensitivities. Simulations studies are performed to verify the proposed method.

show abstract

“…The traditional control techniques such as off‐load tap changer may not solve the problem of voltage rise. Moreover, voltage regulators, online tap changer, and capacitor banks as classical techniques of voltage regulation are costly, and they may lead to additional reasons for failure …”

Section: Introductionmentioning

confidence: 99%

Voltage control of unbalanced three-phase networks using reactive power capability of distributed single-phase PV generators

Eid

Abdel‐Akher

2017

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Summary In this paper, a developed voltage control method for distributed single‐phase photovoltaic (PV) generators in unbalanced distribution networks is proposed. The reactive power capability of the PV inverters has been used to regulate bus voltages during irradiance or load variations. The amount of the reactive power required to optimize phase voltages is calculated using fuzzy logic control function, and hence, the power factor is precisely determined. The proposed control for the PV inverters is based on the dq‐current control to regulate the DC bus voltage and the amount of the reactive power. A hysteresis current control is used as a pulse width modulation gate generator. The proposed control precisely determines the amount of the required reactive power to regulate the system bus voltages to lie within standard limits. The efficiency of the proposed control is evaluated with a 10‐node, 5 kV/phase unbalanced three phase distribution system. The analysis includes different test cases under transient and steady state operations to ensure accurate representation of the actual system. The obtained results assess the quality of the network voltages of the studied system regarding voltage levels and the degree of the unbalance. Moreover, the proposed control is capable of operation under different power factors of the PV inverter.

show abstract

On Coordinated Control of OLTC and Reactive Power Compensation for Voltage Regulation in Distribution Systems With Wind Power

Cited by 88 publications

References 33 publications

Voltage regulation system for OLTC in distribution power systems with high penetration level of embedded generation

Voltage regulation system for OLTC in distribution power systems with high penetration level of embedded generation

Coordinated voltage regulation of hybrid AC/DC medium voltage distribution networks

Voltage control of unbalanced three-phase networks using reactive power capability of distributed single-phase PV generators

Contact Info

Product

Resources

About