Papers by Keyword: Reactive Power Compensation

Abstract: Revamping of electrified railway traction power supply is to improve the railway transport capacity and important measures to promote the development of national economy. As a result of the traction power supply voltage was higher, the simulation technology was applied to modification of the traction power supply system. For the development of research workers to reduce risk and funding has become an international practice. Traction power supply system and the modeling and simulation of the traction power supply capacity technology are discussed in detail. It points out the simulation technology in the development direction of expansion engineering in the application of traction power supply.

Abstract: According to the base function and harmonic wave voltage separate effect of different mathematical model is set up the extension of the hybrid filter respectively. In the MATLAB environment, the paper analyzes the active filter effectively restrain system to the power grid impedance of the series-parallel resonant characteristics of passive power filter device and tolerance sensitivity of quality factors. Conclusion: capacitor tolerance have bigger influence on the quality factor. And through the programming into hybrid filter above build simulation module, the simulation is to get ideal effect of reactive power compensation and harmonic suppression.

Abstract: This paper proposes the optimization method on reactive power compensation of distribution network. The objective is that total loss difference between before being compensated and after should get maximum. The method adopts back/forward sweep method for calculating power flow to obtain total active network loss. Then global neighborhood searching strategy and aspiration criterion for fixed parallel capacitor are established by tabu search algorithm. The optimal installation location and compensation capacity of fixed parallel capacitor are determined. Optimizing simulation on a 34 nodes distribution system is realized, and optimal planning scheme is obtained. Results show that the proposed method is feasible and effective in optimal planning on reactive power compensation of distribution network.

Abstract: As an increasing proportion of wind power in power grid, reactive power problem has become the most important problems in wind power integration. But as a result of wind power is a kind of intermittent energy sources, and put it into use in a large scale only just beginning. Many urgent problems which affect on system stability need to be resolved, such as voltage stability, reactive power compensation. This paper discussed the problems which around the reactive power compensation and angle stability issues while wind power integration. The reactive power compensation device named STATCOM instead of traditional capacitance. Establish the mathematical model of the Doubly-Fed Induction Generator (DFIG) and Static Synchronous Compensator (STATCOM) [3]. In order to meet the wind farm can transport reactive power quickly and continuously after fault. Establish the control strategy of DFIG combined with STATCOM [1]. Using the software MATLAB to simulate the wind power grid model and control system, verifies the rightness and effectiveness of model and STATCOM reactive power compensation effect for wind power integration.

Abstract: A unified control method of comprehensive compensation system based on CS- APF and SVC is introduced in this paper. SVC is composed of thyristor controlled reactor (TCR) and fixed capacitor (FC). For the CS- APF control, a feedforward control for harmonic compensation of SVC and load is applied. The CS- APF is enabled to optimize the var compensation performance of SVC. Finally, the simulation results show that the system can effectively compensate reactive power and eliminate harmonic currents.

Abstract: Nowadays in the restructured scenario, the main challenging objective of the modern power system is to avoid blackouts and provide uninterrupted quality power supply with dynamic response during emergency to improve power system security and stability. In this sense the convertible static compensator (CSC) that is the Generalized Inter line power flow controller (GIPFC), can control and optimize power flow in multi-line transmission system instead of controlling single line like its forerunner FACTS (Flexible AC Transmission System) controller. By adding a STATCOM (Static synchronous Shunt Converter) at the front end of the test power system and connecting to the common DC link of the IPFC, it is possible to bring the power factor to higher level and harmonics to the lower level and this arrangement is popularly known as Generalized Inter line power flow controller (GIPFC). In this paper a new concept of GIPFC based on incorporating a voltage source converter with zero sequence injection SPWM technique is presented for reinforcement of system stability margin. A detailed circuit model of modified GIPFC is developed and its performance is validated for a standard test system. Simulation is done using MATLAB Simulink. Index Terms—Convertible static controller, Flexible AC Transmission System (FACTS), Generalized Interline Power Flow Controller (GIPFC), STATCOM, SSSC, Reactive power compensation.

Abstract: An application of an energy saving device for air compressor in intelligent industrial park is introduced in this paper. The program of air compressor energy saving system, working principle, and technical features are described in details. Actual running result shows that the air compressor device can greatly improve the power quality of enterprise, enhance the power factor. This device plays a role of energy saver in manufacturing process, indicates the direction of technical innovation in intelligent power for industrial park, and provides reliable technical support.

Abstract: The electric vehicle (EV) charging stake is widely used for recharging the electric car batteries. The charging stake generally adopts switching power supply technology. It will cause serious harmonic pollution to power systems and consume lots of reactive power. Therefore, this dissertation focuses on the active power filter (APF) for the EV charging stake. Firstly, the principle of the APF are briefly introduced. Secondly, the main design and the technical difficulties are illustrated in detail. The controller of the APF is based on the DSP and the model is TMS320F2812. At last, this study is simulated in Matlab and a prototype is constructed. The simulation and the experimental results prove that the APF can functions well for the electric vehicle charging stake. It has achieved the national power quality standard.

Abstract: According to the low power factor and low running efficiency, a dynamic reactive power compensation method of the super high-power and high-voltage motor is proposed in this paper. The following works have been done in the study: topology of the dynamic reactive power compensation device; principle of the dynamic reactive power compensation method; control system of the dynamic reactive power compensation device; implementation of the dynamic reactive power compensation method. The amount of reactive power compensation can be adjusted smoothly and dynamically in the process of the super high-power and high-voltage motor soft-starting. The research of this paper has laid a theoretical foundation for this compensator in industrial applications. The novel design is characterized by flexible parameter setting, excellent soft starting performance of the super high-power and high-voltage motor and bright prospect in application.

Abstract: A large number of inductive loads need the reactive power, and the amount of the reactive power compensation is different in a state of work. The traditional static reactive power compensator is difficult to meet the needs of the reactive power compensation for the composite load reactive. Therefore, a dynamic reactive power compensation method of the composite power load is proposed in this paper. The following works have been done in the study: principle of dynamic reactive power compensation control method, topological structure of dynamic reactive power compensation device, and implementation of the dynamic reactive power compensation control method.