黄山干式变压器：有载调容量黄山干式变压器运行情况和几点看法

有载调容量黄山干式变压器运行情况和几点看法 　　
1.运行情况
浙江省***建筑公司基本上是一个单班制工厂，除白天上班外，部分设备中班也有工作，其主要用电设备为拌和机、锯板机、钢筋对焊机、水泵，拉丝机等.为此，安装了一台100kVA低损耗有载调容量黄山干式变压器。
为了对节电教量进行准确测定，添装了高压计量柜。以计量高压有功电能和有压无功电能，低压侧基本上未动，原有低压动力、低压照明有功和低压无功电能计量。将新黄山干式变压器的自动控制器安放在配电室内.其电缆与黄山干式变压器的有关桩头相连接。
经实测，年总节电量为26144kW·h。
如按目前平均电价0.4元//kW ·h计算，则投资回收年限只要2年。

2.几点看法
1)在适合使用调容量黄山干式变压器的地方，推广使用效率高、能耗低的有级调容量黄山干式变压器，是降损节能的有效措施之一。
2)在单班制工厂，适宜使用有载调容量黄山干式变压器，使用方便，管理、维护与常规黄山干式变压器差不多，受到欢迎。
3)运行相当一段时间后。对有载调容量黄山干式变压器从底部放油取油样(靠[ci手 机：13287501888tyname]干式变压器侧)，油色橙黄透明正常，未发现炭粒和变质现象.耐压为51kV,证明黄山干式变压器性能良好。以后继续运行后。运行情况良好、正常。
4)控制器根据负载大小自动换挡，无需人工操作（也可手动切换).
5)供电电压正常，切换过程中无失电现象.用示波器观察，波形未明显畸变，对各类用电负载无影响。(试验时曾用电灯、电风扇、碘钨灯、汞灯、继电器、接触器、电视机、电流表、电压表、示波器等各类负载来进行观察.无任何形响。)
6)由大挡到小档有30min延时，小挡到大挡有0.5min延时，以免动作过于频繁(以上时延数值可按工厂负载性质由控制器随意调整)
7)对用户的用电及负载变化无附加限制。
8)黄山干式变压器在大挡和小挡运行，控制器可以电 话：0635-8888299分别进行过载保护。此时控制器可分别跳高压油黄山干式变压器或低压黄山干式变压器或接触器，黄山干式变压器的短路靠高压熔丝和控制器双重保护.虽然其黄山干式变压器高压熔丝按大容量挡选择，但因黄山干式变压器熔丝的技术性能指标是在1.3倍额定电流下，1h内不熔断，2倍额定电流下，lh内熔断.因短路电流是额定电流的20多倍，已进入熔丝安-秒特性曲线，其短路电流的大小.对熔断时间的影响甚徽(因反时限部分在中段).所以两个容量可以共用一挡黄山干式变压器熔丝。面黄山干式变压器根据规定。2倍额定电流下，长只允许10min,据上述合格的熔丝大裕lh.才熔断。因此，它不能主要作过载保护，因此，必须由控制器来完成过载保护。

Load transfer capacity of transformer operation and a few observations

1 operation
*** Construction Company, Zhejiang Province, is basically a single-shift plants, in addition to working during the day, the middle shift is also part of the equipment work, the main electrical equipment for the mixing machine, sawing machine, steel butt welding machine, water pump, wire drawing machine etc. To this end, the installation of a 100kVA load transfer capacity of low loss transformers.
In order to accurately determine the amount of energy-saving education, Tim installed a high-pressure metering cabinet. To measure active energy and high pressure reactive energy, low-pressure side of the largely intact, the original low-power, low voltage lighting, active and reactive energy measurement of low pressure. The new transformer will be placed in the distribution of indoor automatic controller its cable and the transformer is connected to the trailer coupl企业账号：1611 0032 092 00213 086ing.
After measurement, the total annual electricity savings of 26144kW • h.
If the current average price 0.4 yuan / / kW • h terms, the investment recovery period as long as 2 years.

2 Opinions
1) suitable for transfer where the transformer capacity, promote the use of high efficiency, low energy consumption level of a transfer capacity of the transformer, the Energy Conservation and effective measures.
2) in single-shift plants, suitable for load transfer capacity of the transformer to use, easy to use, management, maintenance and similar conventional transformer, to be welcomed.
3) run for quite some time. Transfer capacity of the transformer on-load release oil from the bottom of the oil samples taken (by the switch side), the oil color orange transparent normal and found no carbon particles and deterioration phenomenon. Pressure to 51kV, transformer proved good performance. Continue after running. Performed well, normal.
4) automatic shift controller according to load size, no manual (also can be manually switched).
5) The supply voltage is normal, no loss of power during the switching phenomenon. With an oscilloscope, waveform distortion is not significant, no effect on the various types of electrical loads. (Test had to use electric lights, electric fans, halogen lamp, mercury lamps, relays, contactors, TV, ammeter, voltmeters, oscilloscopes and other types of loads to be observed. Without any form of sound.)
6) by the large block to a small file with 30min delay, a small block to big block with 0.5min delay, avoiding too frequent (more than the nature of delay values ??can be factory loads be adjusted by the controller)
7) the user of electricity and load changes without additional restrictions.
8) transformer block and small block in the big run, the controller can separate overload protection. The controller can jump high, respectively low-voltage circuit breaker or oil circuit breaker or contactor, transformer short-circuit high-voltage fuse and controller by double protection, although its large-capacity transformer high-voltage fuse block by choice, but the fuse of the transformer technical performance indicators is 1.3 times the rated current, 1h do not fuse within 2 times the rated current, lh within the fuse. due to short-circuit current is 20 times the rated current, has entered the melting Sian - second characteristic curve, the short-circuit current the size of the impact on the operating time is very emblem (some time in the middle due to anti-), so two can share a block size transformer fuse. Face transformer according to regulations. 2 times the rated current for up to only 10min, according to the maximum margin of qualified fuse lh. Was blown. Therefore, it is not primarily for overload protection, therefore, must be done by the controller overload.

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