A distribution static compensator (DSTATCOM) is used for load voltage regulation, and its performance mainly depends upon the feeder impedance and its nature (resistive, inductive, stiff, nonstiff). However, a study for analyzing voltage regulation performance of DSTATCOM depending upon network parameters is not well defined. This paper aims to provide a comprehensive study of design, operation, and flexible control of a DSTATCOM operating in voltage control mode. A detailed analysis of the voltage regulation capability of DSTATCOM under various feeder impedances is presented. Then, a benchmark design procedure to compute the value of external inductor is presented. A dynamic reference load voltage generation scheme is also developed, which allows DSTATCOM to compensate load reactive power during normal operation, in addition to providing voltage support during disturbances. Simulation and experimental results validate the effectiveness of the proposed scheme. © 2016 IEEE.

Mahesh Kumar Mishra

Department of Electrical Engineering

Benchmarking

Electric current control

STATIC SYNCHRONOUS COMPENSATORS

Voltage control

Voltage regulators

BENCHMARK DESIGNS

DISTRIBUTION STATIC COMPENSATOR

Improving performance

Network parameters

Power factors

REGULATION CAPABILITY

Voltage-control modes

Voltage-controlled

quality control

Fulltext

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IIT Madras

Design of External Inductor for Improving Performance of Voltage-Controlled DSTATCOM

IEEE Transactions on Industrial Electronics

Loads connected to a stiff source cannot be protected from voltage disturbances using a distribution static compensator (DSTATCOM). In this paper, a new control-algorithm-based multifunctional DSTATCOM is proposed to operate in voltage control mode under stiff source. This scheme provides fast voltage regulation at the load terminal during voltage disturbances and protects critical loads. In addition, during normal operation, the generated reference load voltages allow control of the source currents. Consequently, DSTATCOM injects reactive and harmonic components of load currents to make source power factor unity. Simulation and experimental results are presented to verify the efficacy of the proposed control algorithm and multifunctional DSTATCOM. © 2013 IEEE.

A multifunctional DSTATCOM operating under stiff source

This paper proposes a new algorithm to generate reference voltage for a distribution static compensator (DSTATCOM) operating in voltage-control mode. The proposed scheme exhibits several advantages compared to traditional voltage-controlled DSTATCOM where the reference voltage is arbitrarily taken as 1.0 p.u. The proposed scheme ensures that unity power factor (UPF) is achieved at the load terminal during nominal operation, which is not possible in the traditional method. Also, the compensator injects lower currents and, therefore, reduces losses in the feeder and voltage-source inverter. Further, a saving in the rating of DSTATCOM is achieved which increases its capacity to mitigate voltage sag. Nearly UPF is maintained, while regulating voltage at the load terminal, during load change. The state-space model of DSTATCOM is incorporated with the deadbeat predictive controller for fast load voltage regulation during voltage disturbances. With these features, this scheme allows DSTATCOM to tackle power-quality issues by providing power factor correction, harmonic elimination, load balancing, and voltage regulation based on the load requirement. Simulation and experimental results are presented to demonstrate the efficacy of the proposed algorithm. © 1986-2012 IEEE.

IEEE Transactions on Power Delivery

A voltage-controlled DSTATCOM for power-quality improvement

The distribution static compensator (DSTATCOM) is used for load compensation in power distribution network. In this paper, a new topology for DSTATCOM applications with nonstiff source is proposed. The proposed topology enables DSTATCOM to have a reduced dc-link voltage without compromising the compensation capability. It uses a series capacitor along with the interfacing inductor and a shunt filter capacitor. With the reduction in dc-link voltage, the average switching frequency of the insulated gate bipolar transistor switches of the DSTATCOM is also reduced. Consequently, the switching losses in the inverter are reduced. Detailed design aspects of the series and shunt capacitors are discussed in this paper. A simulation study of the proposed topology has been carried out using power systems computer-aided design simulator and the results are presented. Experimental studies are carried out to verify the proposed topology. © 2011 IEEE.

IEEE Transactions on Power Electronics

A DSTATCOM topology with reduced DC-link voltage rating for load compensation with nonstiff source

Improved Power-Quality-Based Welding Power Supply With Overcurrent Handling Capability

Model Predictive Approach for a Simple and Effective Load Voltage Control of Four-Leg Inverter With an Output <inline-formula> <tex-math notation="TeX">$LC$</tex-math></inline-formula> Filter

Journal	Data powered by TypesetIEEE Transactions on Industrial Electronics
Publisher	Data powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
ISSN	02780046
Open Access	Yes