Network partition for coordinated control in active distribution networks

Biserica, M.; Foggia, Guillaume; Chanzy, Emmanuel; Passelergue, Jean-Christophe

doi:10.1109/ptc.2013.6652277

Cited by 30 publications

(16 citation statements)

References 5 publications

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“…OLTC constraints: Equations (10)- (11). b. PV constraints: Equations (13)- (14). c. SC constraints: Equation (16).…”

Section: Objective Function and Problem Solvingmentioning

confidence: 99%

“…If PV inverters are still controlled in a centralized manner, the control response time will not be satisfactory because of the extremely high dimensions of the control variables and the complicated control process. Considering the deficiency of the centralized control method, the zonal voltage control method has been proposed as a promising solution for this problem in recent years [14][15][16][17]. In contrast to centralized control methods, zonal voltage control selects a partition index to divide the power grid into sub-networks with the corresponding partitioning method; the internal nodes will have strong coupling between each other in the same sub-network, but weak coupling between nodes in different sub-networks.…”

Section: Introductionmentioning

confidence: 99%

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Zonal Voltage Control Combined Day-Ahead Scheduling and Real-Time Control for Distribution Networks with High Proportion of PVs

Xiao

Zhao²,

Ding

et al. 2017

Energies

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Considering the possible overvoltage caused by the high proportion of photovoltaic systems (PVs) accessing distribution networks in the future, traditional centralized control methods will be too complex to satisfy the control response time demands. To solve this problem this paper presents a two-level voltage control method. At the day-ahead level, based on the PV-output and load-demand forecast, a community detection algorithm using an improved modularity index is introduced to divide the distribution network into clusters; a day-ahead optimal scheduling is drawn up on the basis of the network partition, and the objective is to minimize the operation costs of the distribution networks. At the real-time level, under the day-ahead optimal scheduling and network partition of the upper level, a real-time optimal voltage control algorithm is proposed based on the real-time operation data of the distribution networks, and the objective is to correct the day-ahead optimal scheduling through modifications. Thus, the algorithm realizes the combination of day-ahead scheduling and real-time control and achieves complete zonal voltage control for future distribution networks with high proportion of PVs. The proposed method can not only optimize the tap operation of an on-load tap changer (OLTC), improving the PV hosting capacity of the distribution network for a high proportion of PVs, but can also reduce the number of control nodes and simplify the control process to reduce the optimization time. The proposed approach is applied to a real, practical, 10 kV, 62-node feeder in Zhejiang Province of China to verify its feasibility and effectiveness.

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“…OLTC constraints: Equations (10)- (11). b. PV constraints: Equations (13)- (14). c. SC constraints: Equation (16).…”

Section: Objective Function and Problem Solvingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zonal Voltage Control Combined Day-Ahead Scheduling and Real-Time Control for Distribution Networks with High Proportion of PVs

Xiao

Zhao²,

Ding

et al. 2017

Energies

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show abstract

“…A handful of references [12][13][14] have reported electric power network partition and reconfiguration methods. A k-means algorithm-based network partition method was proposed in [12] for ancillary services in distribution networks. An agglomerative algorithm and power flow tracing based power network partition method was developed in [13] for large power systems to carry out reactive power control.…”

Section: Introductionmentioning

confidence: 99%

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

2020

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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.

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“…Algorithms for the network partition were proposed to solve the computational complexity caused by the expansion of the network [10][11][12][13][14][15][16][17]. A large network is partitioned into several clusters in which the supply and demand is balanced, cohesiveness is high, and inter-connection is low so that the control strategy can be applied to each cluster in parallel.…”

Section: Introductionmentioning

confidence: 99%

“…Network partitioning requires a distance matrix indicating the dependency of any two nodes. Commonly the differential of the voltage as a function of the power was used as the distance matrix, and the traditional k-means algorithm was applied to achieve the clusters [10]. In one study [11], the usage of the spectral clustering in a power grid was analyzed, and several weight matrixes were proposed and compared.…”

Section: Introductionmentioning

confidence: 99%

Power-mileage-based Algorithm for the Optimization of Distribution Network Structures via Adding Transmission Lines

Wei

Chen

et al. 2019

Energies

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In remote areas, large power stations are often installed to supply local loads due to the difficulties of power transmission. However, with the development of renewable energies and poverty alleviation programs, many renewable energy stations have been installed in such areas. This large amount of surplus and fluctuating energy causes a poor voltage quality, and this problem is difficult to solve with traditional methods. Adding transmission lines can be a feasible solution, but the related research is limited. To provide a guideline for this solution, a network optimization algorithm is proposed in this paper. In the process, a sub-grid that is far from the national grid with an imbalanced power supply and demand is connected to the national grid directly to improve the power quality. First, the linear performance index power mileage is defined to facilitate the calculation and help denote the voltage quality. Then, an iterative algorithm is formed to perform the network optimization and automatically choose the number of clusters. A case study of an actual power grid in Chongqing, China, and an IEEE 123-bus case are used to verify our algorithm. The results show there is a great improvement in the voltage profile.

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Network partition for coordinated control in active distribution networks

Cited by 30 publications

References 5 publications

Zonal Voltage Control Combined Day-Ahead Scheduling and Real-Time Control for Distribution Networks with High Proportion of PVs

Zonal Voltage Control Combined Day-Ahead Scheduling and Real-Time Control for Distribution Networks with High Proportion of PVs

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

Power-mileage-based Algorithm for the Optimization of Distribution Network Structures via Adding Transmission Lines

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