scholarly journals Robust reactive power optimisation and voltage control method for active distribution networks via dual time-scale coordination

2017 ◽  
Vol 11 (6) ◽  
pp. 1461-1471 ◽  
Author(s):  
Weiye Zheng ◽  
Wenchuan Wu ◽  
Boming Zhang ◽  
Yongjie Wang
Keyword(s):  
Time Scale ◽  
Reactive Power ◽  
Control Method ◽  
Voltage Control ◽  
Distribution Networks ◽  
Active Distribution Networks

scholarly journals Double-Time-Scale Coordinated Voltage Control in Active Distribution Networks Based on MPC

2020 ◽  
Vol 11 (1) ◽  
pp. 294-303 ◽  
Author(s):  
Yifei Guo ◽  
Qiuwei Wu ◽  
Houlei Gao ◽  
Sheng Huang ◽  
Bin Zhou ◽  
...  
Keyword(s):  
Time Scale ◽  
Voltage Control ◽  
Distribution Networks ◽  
Double Time ◽  
Active Distribution Networks

scholarly journals Multiple Spatiotemporal Characteristics-Based Zonal Voltage Control for High Penetrated PVs in Active Distribution Networks

Energies ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 249 ◽  
Author(s):  
Chuanliang Xiao ◽  
Lei Sun ◽  
Ming Ding
Keyword(s):  
Time Domain ◽  
Reactive Power ◽  
Voltage Control ◽  
Distribution Networks ◽  
Spatial Domain ◽  
Active Power ◽  
Short Term ◽  
Control Scheme ◽  
The Time Domain ◽  
Active Distribution Networks

The penetration of photovoltaic (PV) outputs brings great challenges to optimal operation of active distribution networks (ADNs), especially leading to more serious overvoltage problems. This study proposes a zonal voltage control scheme based on multiple spatiotemporal characteristics for highly penetrated PVs in ADNs. In the spatial domain, a community detection algorithm using a reactive/ active power quality function was introduced to partition an ADN into sub-networks. In the time domain, short-term zonal scheduling (SZS) with 1 h granularity was drawn up based on a cluster. The objective was to minimize the supported reactive power and the curtailed active power in reactive and active power sub-networks. Additionally, a real-time zonal voltage control scheme (RZVC) with 1 min granularity was proposed to correct the SZS rapidly by choosing and controlling the key PV inverter to regulate the supported reactive power and the curtailed active power of the inverters to prevent the overvoltage in each sub-network. With the time domain cooperation, the proposed method could achieve economic control and avoid overvoltage caused by errors in the forecast data of the PVs. For the spatial domain, zonal scheduling and zonal voltage control were carried out in each cluster, and the short-term scheduling and voltage controlling problem of the ADN could then be decomposed into several sub-problems. This could simplify the optimization and control which can reduce the computing time. Finally, an actual 10kV, 103-node network in Zhejiang Province of China is employed to verify the effectiveness and feasibility of the proposed approach.

scholarly journals Decentralized Voltage Control Strategy of Soft Open Points in Active Distribution Networks Based on Sensitivity Analysis

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 295 ◽  
Author(s):  
Jinli Zhao ◽  
Mingkun Yao ◽  
Hao Yu ◽  
Guanyu Song ◽  
Haoran Ji ◽  
...  
Keyword(s):  
Large Scale ◽  
Control Method ◽  
Voltage Control ◽  
Distribution Networks ◽  
Power Electronic ◽  
Voltage Control Strategy ◽  
Distributed Generators ◽  
Alternating Direction ◽  
Active Distribution Networks ◽  
Open Point

With the increasing penetration of distributed generators, various operational problems, especially severe voltage violation, threaten the secure operation of active distribution networks. To effectively cope with the voltage fluctuations, novel controllable power electronic equipment represented by soft open points has been used in active distribution networks. Meanwhile, the communication has dramatically increased due to the rise of the variety and number of devices within the network. This paper proposes a decentralized voltage control method of soft open points based on voltage-to-power sensitivity. The method reduces the burden of communication, storage, and calculation effectively in a decentralized manner and fulfills the rapid requirements of large-scale active distribution networks. First, the network is divided into several sub-areas; each is under the control of one soft open point at most. The initial strategies of soft open points are adjusted by local voltage-to-power sensitivity and the voltage information within the sub-areas. If some nodal voltages still exceed the expected range after the sub-area autonomy, the operation strategies of soft open points are further improved by inter-area coordination with the alternating direction method of multipliers algorithm. The effectiveness of the proposed decentralized control method is verified on the IEEE 33-node system.

A Double-Layered Fully Distributed Voltage Control Method for Active Distribution Networks

2019 ◽  
Vol 10 (2) ◽  
pp. 1465-1476 ◽  
Author(s):  
Iasonas N. Kouveliotis-Lysikatos ◽  
Despina I. Koukoula ◽  
Nikos D. Hatziargyriou
Keyword(s):  
Control Method ◽  
Voltage Control ◽  
Distribution Networks ◽  
Active Distribution Networks

scholarly journals Voltage Control Method for Active Distribution Networks Based on Regional Power Coordination

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4364 ◽  
Author(s):  
Ou-Yang ◽  
Long ◽  
Du ◽  
Diao ◽  
Li
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Control Method ◽  
Voltage Control ◽  
Distribution Networks ◽  
Active Power ◽  
Reactive Power Control ◽  
Safety Issues ◽  
Bus Voltage ◽  
The Relationship

As loads connected to active distribution network (ADN) grow, ADN’s voltage safety issues are becoming more serious. At present, the solution is mainly to build more distributed generation (DG) or to adjust the reactive power in the whole network, but the former needs a lot of investment while the latter requires a large amount of communication equipment and it takes a long time to calculate the adjustment amount of reactive power and to coordinate reactive power compensation equipment. When the loads are heavy, there will still be drawbacks of insufficient reactive power. Therefore, this paper analyzes the relationship between the active power, reactive power, and the voltage in the ADN. Through the autonomous region (AR) division, a voltage control method based on the active power variation and adjustable power in the AR is proposed. According to the relationship between the amount of active power and the adjustable amount active power, the active power control, the reactive power control, and the coordinated control of active power reactive power control are adopted to adjust the DGs’ output to stabilize the bus voltage. The simulation results show that the proposed method can effectively improve the voltage control capability of ADN and can enable it to operate normally under greater power changes. Through the control method in this paper, the communication requirements are greatly reduced and the calculation time is effectively shortened and is more adaptable.

Micro Static Var Compensator for Over-Voltage Control in Distribution Networks with High Penetration of Rooftop Photovoltaic Systems

2016 ◽  
Vol 839 ◽  
pp. 54-58 ◽  
Author(s):  
Piyadanai Pachanapan ◽  
Phudit Inthai
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Control Method ◽  
Voltage Control ◽  
Distribution Networks ◽  
Static Var Compensator ◽  
Pv System ◽  
Reactive Power Control ◽  
Pv Systems ◽  
Dynamic Voltage

A micro static var compensator (µSVC) is introduced in this work to prevent the over-voltage problems in radial distribution networks with high number of rooftop photovoltaic (PV) connections. The µSVC is aimed to use in the PV system that has the fixed-power factor inverter, which cannot provide the active voltage controllability. The µSVC is a small shunt compensator installed parallel with the PV system and providing the automatic reactive power support to deal with the dynamic voltage variations at the point of common coupling. Two reactive power control methods, Q(P) and Q(V), can be employed into each µSVC depending on the location of PV systems. Moreover, the coordinated reactive power control among µSVCs, without communication system requirement, is presented for enhancing the Volt-Var controllability to the group of PV systems located in the same feeder. The dynamic voltage control performances are examined on simulation in DIgSILENT PowerFactory software. The results showed that the proposed control method can mitigate the rise of voltage level sufficiently.

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