Voltage Control Methods in the MV Grid with a Large Share of PV

2019 ◽  
Vol 20 (4) ◽  
Author(s):  
Csaba Farkas ◽  
András Tóth ◽  
Imre Orlay
Keyword(s):  
Distribution Systems ◽  
Voltage Regulation ◽  
Voltage Regulator ◽  
Voltage Profile ◽  
Distribution Grid ◽  
Large Share ◽  
Photovoltaic Generation ◽  
Line Voltage ◽  
Medium Voltage

Abstract The traditional distribution grid is operated radially and has passive consumers that only draw power from the grid but feed nothing back This operation is already under change so the traditional voltage regulation methods currently used in distribution systems need major modifications if we are to uphold the proper quality of electricity supply. In our paper we present the possible impact photovoltaic generation will likely have on the medium voltage grid and the means to lessen these impacts: we investigate various control options for solar inverters and a line voltage regulator as well. Simulation results indicate that the voltage profile can be maintained within the allowed limits with these regulation methods.

Allocation and Sizing of Dispersed Photovoltaic Generation in Diesel Isolated Electrical Systems Using an Analytical Approach

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Claudio Goncalves ◽  
J. Paulo A. Vieira ◽  
Dione J. A. Vieira ◽  
M. Emilia L. Tostes ◽  
Bernard C. Bernardes ◽  
...  
Keyword(s):  
Active Power ◽  
Voltage Profile ◽  
Power Losses ◽  
Analytical Methodology ◽  
Photovoltaic Generation ◽  
Electrical Grid ◽  
Medium Voltage ◽  
Electrical Systems ◽  
Electrical Grids ◽  
Active Power Losses

This paper proposes an analytical methodology to allocate and size active power photovoltaic generation (PVG) units with embedded DC/AC inverter (PVGI) to be integrated as concentrated or dispersed generation in isolated medium voltage electrical grids. The methodology considers multiple objectives: improving the electrical grid voltage profile; reducing active power losses and the diesel generation participation. To validate the proposed methodology, the IEEE 33 and 69 buses networks and an isolated real electrical system were simulated. The results obtained demonstrated that the proposed methodology is effective in providing a solution with improvement in voltage profile, active power losses reduction, diesel generation participation reduction.

scholarly journals Deployment of low-voltage regulator considering existing voltage control in medium-voltage distribution systems

2016 ◽  
Vol 6 (1) ◽  
pp. 252-260
Author(s):  
Hiroshi Kikusato ◽  
Jun Yoshinaga ◽  
Yu Fujimoto ◽  
Yasuhiro Hayashi ◽  
Shinichi Kusagawa ◽  
...  
Keyword(s):  
Distribution Systems ◽  
Low Voltage ◽  
Voltage Control ◽  
Voltage Regulator ◽  
Voltage Distribution ◽  
Medium Voltage

Optimum Location of Voltage Regulators in the Radial Distribution Systems

2016 ◽  
Vol 17 (3) ◽  
pp. 351-361 ◽  
Author(s):  
Surender Reddy Salkuti ◽  
Young Hwan Lho
Keyword(s):  
Radial Distribution ◽  
Heuristic Algorithm ◽  
Distribution System ◽  
Distribution Systems ◽  
Voltage Regulation ◽  
Optimal Location ◽  
Voltage Regulators ◽  
Optimal Placement ◽  
Voltage Profile ◽  
Minimum Number

Abstract In this paper, a new heuristic algorithm is proposed for the optimum voltage control, which is applicable for the large Radial Distribution Systems (RDSs). In the RDSs, voltage levels at different buses can be maintained within the specified limits using the conductor grading or placing the Voltage Regulators (VRs) and capacitors at suitable locations. The proposed Back Tracking Algorithm (BTA) proposes the optimal location, number and tap positions of VRs to maintain the voltage profile within the desired limits and decreases losses in the system, which in turn maximizes the net savings in the operation of distribution system. In addition to BTA, an approach using the fuzzy logic called Fuzzy Expert System (FES) is also proposed, and the results of FES are compared with the results of BTA. This heuristic algorithm proposes the optimal location and tap setting of VRs, which contributes a smooth voltage profile along the network. It also used to access the minimum number of initially considered VRs, by moving them in such way as to control the network voltage at minimum possible cost. It is concluded that the FES also gives the optimal placement and the number along with the tap settings of VRs. The proposed FES contributes good voltage regulation, and decreases the power loss which in turn increases the net savings when compared to the BTA. The effectiveness of the proposed heuristic approaches are examined on practical 47 bus and 69 bus Radial Distribution Systems (RDSs).

scholarly journals Enhancement of voltage regulation using a 7-Level inverter based electric spring with reduced number of switches

2020 ◽  
Vol 11 (2) ◽  
pp. 555
Author(s):  
K. K. Deepika ◽  
J. Vijaya Kumar ◽  
G. Kesava Rao
Keyword(s):  
Critical Load ◽  
Distribution System ◽  
Distribution Systems ◽  
Voltage Regulation ◽  
Voltage Sag ◽  
Demand Side ◽  
Line Voltage ◽  
Load Voltage ◽  
Voltage Balance ◽  
Switched Capacitor Converter

Electric Springs has been testified recently to enhance voltage regulation in distribution systems using demand side management. In this paper, a 7-level Multilevel Inverter (MLI) with a resonant switched capacitor Converter based on sinusoidal PWM, is implemented to analyze the performance of an electric spring under voltage variations at PCC. By the proposed MLI based ES, voltage regulation of critical load voltage is studied for voltage sag and swell conditions. Remarkable features of the proposed topology are maintaining voltage balance in input capacitors and reduction of power components. Simulations have been done in MATLAB/Simulink on distribution system with DGs equipped with MLI based ES under line voltage anomalies. Tested results are analyzed with THD% in critical load voltage.

scholarly journals Voltage regulation and power losses reduction in a wind farm integrated MV distribution network

2018 ◽  
Vol 69 (1) ◽  
pp. 85-92 ◽  
Author(s):  
Ghaeth Fandi ◽  
Famous Omar Igbinovia ◽  
Josef Tlusty ◽  
Rateb Mahmoud
Keyword(s):  
Power Electronics ◽  
Wind Farm ◽  
Reactive Power ◽  
Distribution Networks ◽  
Voltage Regulation ◽  
Electric Power System ◽  
Voltage Source ◽  
Voltage Profile ◽  
Power Losses ◽  
Medium Voltage

Abstract A medium-voltage (MV) wind production system is proposed in this paper. The system applies a medium-voltage permanent magnet synchronous generator (PMSG) as well as MV interconnection and distribution networks. The simulation scheme of an existing commercial electric-power system (Case A) and a proposed wind farm with a gearless PMSG insulated gate bipolar transistor (IGBT) power electronics converter scheme (Case B) is compared. The analyses carried out in MATLAB/Simulink environment shows an enhanced voltage profile and reduced power losses, thus, efficiency in installed IGBT power electronics devices in the wind farm. The resulting wind energy transformation scheme is a simple and controllable medium voltage application since it is not restrained by the IGBT power electronics voltage source converter (VSC) arrangement. Active and reactive power control is made possible with the aid of the gearless PMSG IGBT power converters.

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