The Research Based On Laboratory Testing Of Several Load Equipments Which Affect Voltage Stability

During the last decades, a series of blackouts relating to the voltage problemhave happened in the whole world. Among many factors affecting the mid-longterm voltage stability, load characteristic is the most active and direct one. Itdetermines the process of the voltage stability and the voltage collapse to a greatextent.Based on the laboratory test, many researches about voltage collapsesimulation in which people are interested have been done.By the results of thetest, we analyze OLTCS and its characteristic of making loads change in aconsistent way.,for studying the mechanism of voltage collapse. The developmentand application of a control system for on-load tap changing transformers, which isused in the experiment for researching the power system stability,is introduced in thepaper .The air-conditioner is also researched carefully in the thesis based on thelaboratory testing. The air-conditioner load model is also built in this thesis.