Vilva Line Analog Impedance Load for Microgrid Labs
Author：Vilva Date：2013-08-21 15:49:00 Views：
As a concept that has emerged in recent years, micro-grid has been increasingly valued by the society, and micro-networks and distributed power projects have been put into construction everywhere. Systematic and scientific research on microgrids to overcome the problems of stability, security and dynamic control has become an urgent issue. To this end, micro-grid laboratories have also introduced high-tech research equipment and conducted special research.
The complete microgrid consists of at least four parts: the power supply, the substation system, the transmission line, and the power load. Before the formal construction of the microgrid, it is necessary to carry out experimental research on its feasibility. One of the important research projects is whether the current output by the power supply can meet the load requirements after the loss of the long-distance transmission line. However, real long-distance transmission lines will not be installed in the laboratory, but the line analog impedance load is required for simulation experiments.
The microgrid load developed and produced by Shenzhen Welchwa Electronics Co., Ltd. is a line analog impedance load device that can be used as an analog line component in the laboratory instead of a transmission line. Microgrid load full-scale microgrid impedance integrated load, can simulate common line impedance, including the inherent resistance of cable material and length, AC resistance, internal inductance, and external inductance in the transmission circuit, completely replacing the real transmission cable , to build a complete micro-grid system for scientific research experiments.
Vilva line analog impedance load adopts a resistive integrated design, using stainless steel alloy resistors to simulate resistive losses, fixed reactors to simulate inductive losses, components are manufactured using advanced process packaging, supplemented by fan heat dissipation, continuous operation, low temperature There is no red heat phenomenon, which can meet the needs of long-term experiments. The microgrid has a small volume and adopts a split-parallel design, which can be used to input a corresponding number of devices according to actual impedance requirements.
Previously, Weiwei's microgrid load for the Electric Power Research Institute consisted of positive sequence resistance, reactance, zero sequence resistance, and reactance. It can simulate the situation of three-phase asymmetry of the voltage and current of the microgrid. The minimum accuracy of the impedance is 0.0035 ohms. Short-term impact of the maximum current of 622A. By connecting the quick-connect terminal to the microgrid transmission circuit of the laboratory, the true impedance of the long-distance high-voltage transmission line can be simulated.
Vilva line analog impedance load can help the laboratory to investigate the stability and safety of the transmission when the microgrid is independent or connected to the grid, the response speed to the transient changes of the load, verify the intelligent control method of the microgrid supply and demand adjustment, and optimize the scheduling. Key technologies such as seamless switching. Kaixiang microgrid load as energy consumption device can also simulate the electric load in the microgrid and detect the stability, balance and purity of the microgrid output power, thus reducing the risk of microgrid interconnection.
Vilva is a state-level high-tech enterprise specializing in new energy generation, microgrid and smart grid detection. It has the first government-certified enterprise technology center in the industry, and has passed ISO9001 international quality system certification and double-soft certification of the Ministry of Information Industry. The company has developed the first domestic load-quality enterprise standard “dry AC load” (Q/01KX001-2010). Many testing equipments are recommended products in China's power industry.
In addition to the Electric Power Test Institute, Welch also provides testing equipment for Northwestern Nuclear Technology, Guangdong Academy of Building Research, Beijing Institute of Technology, Zhejiang University, Shandong University and other well-known scientific research institutions or universities to assist in conducting power research experiments.
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