CAJ | 학술논문

工程实际中对于小型试验厂或容量有限的变电站而言,如果在额定电流条件下进行变压器负载试验,需要的电源容量较大,即使利用电容补偿弥补电源容量的不足,所需补偿电容器的体积和质量也会给试验实施带来困难.该文分析了变压器常规负载试验方法及其在工程实际中出现的问题,并有针对性的提出了一种改进的负载试验方法.首先通过计算机仿真验证改进方法的可行性,继而对其进行了现场实践,并对改进方法下的负载试验参数重新进行了计算,同时将改进方法与常规方法进行参数误差分析与成本对比分析.结果表明,该文提出的变压器负载试验改进方法可在不提高电源容量的情况下,大幅减少对中间设备如补偿电容器的限制,从而提高试验操作的效率及试验厂站的经济效益,又可满足工程实际精度要求,因此可以作为常规变压器负载试验的一种延伸和发展.
공정실제중대우소형시험엄혹용량유한적변전참이언,여과재액정전류조건하진행변압기부재시험,수요적전원용량교대,즉사이용전용보상미보전원용량적불족,소수보상전용기적체적화질량야회급시험실시대래곤난.해문분석료변압기상규부재시험방법급기재공정실제중출현적문제,병유침대성적제출료일충개진적부재시험방법.수선통과계산궤방진험증개진방법적가행성,계이대기진행료현장실천,병대개진방법하적부재시험삼수중신진행료계산,동시장개진방법여상규방법진행삼수오차분석여성본대비분석.결과표명,해문제출적변압기부재시험개진방법가재불제고전원용량적정황하,대폭감소대중간설비여보상전용기적한제,종이제고시험조작적효솔급시험엄참적경제효익,우가만족공정실제정도요구,인차가이작위상규변압기부재시험적일충연신화발전.
Load test is a kind of regular tests of transformers. It’s also a basic test subject before transformer leaving factory, or undergoing transfer, heavy repair and fault. There are two main test contents, the load loss and short circuit impedance. These parameters are basic performance parameters of transformer, which identify the quality and performance of a transformer. In practical engineering, for miniature trial plant or low-capacity substation, if load test is carried out under rated current, the capacity of test energy source will be insufficient due to the bulk capacity of the underproof transformer. This may exceed the requests of associated experiment equipment, like voltage regulator, intermediate transformer etc. However, even the compensating capacitor is used to cut down the energy source’s capacity, the large volume and weight of compensating capacitor will result in certain difficulty. Aiming at the problems emerged in practical engineering through traditional testing way, article analyzes the principle of classical load test in theory, and puts forward a kind of improved experiment method. The article first proves the feasibility of improved method through computer simulation, then actualizes field load test to transformers through the improved experiment method and recalculates the load test parameters. Finally the article actualizes the error analysis and the cost comparative analysis between the improved method and the classical method. Results indicate that the improved method will decrease the limits to the intermediate equipment without increasing energy source capacity. So it is a good method to enhance the test operating efficiency and the economical benefit, which is able to meet the precision demands of practical engineering. So the improved method can become a kind of extension and development for the classical load test of transformer.