Reactive Power Compensation Retrofit for Workshop Transformer of a Boiler Co., Ltd., Jiangsu
Project Overview
The autoclave workshop of a large boiler manufacturer in Jiangsu is equipped with various large and medium heavy-load production equipment, including polishing machines, CNC cutting machines, welding robots, machining centers, flaw detectors and intelligent testing equipment. The original reactive power compensation cabinet of the workshop suddenly failed to operate, which reduced the active power output of the distribution transformer. The on-site power factor was only 0.7~0.72, far below the assessment standard set by the power supply bureau.
Solution
This project retains the original cabinet, main circuit breaker and sampling current transformers on site, and installs a complete set of harmonic treatment components with a total capacity of 560kvar, including harmonic-resistant reactive power compensation controllers, dynamic compensation regulators, filter reactors and filter capacitors. It can realize dual functions of reactive power compensation and harmonic suppression simultaneously.
Application Effect
After commissioning, the equipment operates stably with the system power factor kept above 0.96. The 5th harmonic current is reduced from 92A to 19A, achieving excellent filtering performance. The equipment dynamically compensates reactive power, eliminates the 5th and 7th harmonics, stabilizes supply voltage and guarantees continuous and safe operation of heavy-load equipment. Besides, it reduces power loss of power lines and transformers, avoids penalties caused by substandard power factor, and effectively cuts the enterprise’s electricity expenditure.
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