In modern cities, electronic devices such as computers, televisions, energy-saving lamps, UPS power supplies, and LED screens are the main sources of harmonics in buildings. Many users choose Dibor Electric to provide solutions and products for their power quality problems, including: Chinese Academy of Sciences, Chinese Academy of Social Sciences, Ministry of Public Security, Tsinghua University, China Huarong, Gemdale Group, Greenland Group, Xinhua Insurance, Jinhao Real Estate, China Aviation, Sheraton China Airlines Sheraton Sanya Hotel, Beijing Grand Theatre, Anhui Museum, Hilton Huaneng Laiwu Hotel, Civil Aviation Business Building, Shandong News Building, Hebei Huailai Wanyue Plaza, Guangxi University, Nanning Employment Building, Jilin Food Building, Central State office buildings and so on.

Municipal projects, such as rail transit, sewage treatment, telecommunications, heat, gas, etc. Computers, air conditioners, chillers, energy-saving lamps, UPS power supplies, LED screens, and inverter-type power loads are the main sources of harmonics. Many users choose Dibor Electric to provide solutions and products for their power quality problems, including: Beijing Water Group, Beijing Capital Airport, Beijing Gas, Beijing Nankou Rail Transit, China Mobile, China Telecom, China Unicom, Anqing Railway Station, Dalian Dock, Guangxi Fangchenggang Port, Liuqian Expressway, Nanning Waste-to-energy, Youyu Wastewater Treatment, Sanya Waste-to-Energy, Shenhai Expressway, Shunyi Water Affairs Bureau, Wenzhou South Wastewater Treatment Plant, etc.

Precision manufacturing projects such as semiconductors, precision components, and integrated circuit manufacturing. The large-scale application of various non-linear electronic device devices such as inverters, rectifiers, and various switching power supplies has improved the modern industrial automatic control technology and also generated a large number of harmonics. Many users choose Dibor Electric to provide solutions and products for their power quality problems, including: Jinli Electronics Co., Ltd., Beijing Optics Valley Technology Park, Dongfang Machinery Electronics, Jiangsu Dongguang Microelectronics, Jingmen Hongxin Flexible Electronic Intelligent Manufacturing Industrial Park, Ningbo Huayuan Electronics, Yanbian direction electronic product production base, Zhongshan Ouke Electronics, Zhongshan Liyin Electronics, Chongqing Liangjiang New Area Electronic Biometer Professional Industrial Park, etc.

The main harmonic sources in health care projects are electronic medical precision equipment, air conditioning, lighting, and UPS. Large-scale electronic medical equipment is generally powered by a switching power supply, and the switching power supply generates 3, 5, and 7 harmonics to be injected into the power grid. Many users choose Dibor Electric to provide solutions and products for their power quality problems, including: Beijing Shunyi District Hospital, Beijing You'an Hospital, Datong Third People's Hospital, Fujian Provincial People's Hospital, First Affiliated Hospital of Fujian Medical University, Hebei Provincial People's Hospital, Jinan Military Region General Hospital, Second Affiliated Hospital of Nanchang University, Ningde Yudong Hospital, Shanxi Children's Hospital, Shanxi Provincial Cardiovascular Disease Hospital, Shaanxi University of Traditional Chinese Medicine Affiliated Hospital, Shijiazhuang Bethune Medical College, Weifang City No. 2 People's Hospital, Second Affiliated Hospital of Xi'an Jiaotong University School of Medicine, Xinjiang Traditional Chinese Medicine Hospital in Tacheng District, etc.

The UPS widely used in the data room is mostly a three-phase full-control bridge with 6-pulse thyristor rectification mode. The single-set capacity is large, and the main harmonics are 5, 7, 11, and 13 harmonics. The switching power supply is the most widely used equipment in the equipment room. Its characteristic is that the unit capacity is relatively small. The single set of switching power supply is composed of 10~20 switching units. Its harmonic current distortion rate is mostly between 30% and 60%. Many users choose Dibor Electric to provide solutions and products for their power quality problems, including: Ningbo Gas Group Data Center, Zhangzhou Broadcasting and Television Data Center, Xinhua Insurance Data Room, Xinjiang Beibei Agricultural Bank, Yancheng Big Data Center, Yibangzhi Control Jilin Cloud Big Data Center, China Unicom Liaoning Computer Room, China Mobile (Liaoning Dalian) Data Center, China Mobile Sanshui Data Center, etc.

Harmonics in power distribution systems in the chemical industry are mainly due to the large use of power electronics. The main equipment for generating harmonics are: chemical electrolytic rectification equipment, frequency conversion speed control device of machine pump, uninterruptible power supply unit (UPS), DC power supply complete sets for substation, new lighting fixtures, etc. Many users choose Dibor Electric to provide solutions and products for their power quality problems, including: shallow sea petrochemical, Shaanxi Shenmu coal chemical, Shenhua Guohua, Shentou coal chemical, Tangjiahui coal mine, Tongliao gold coal chemical, Xinjiang Meike chemical, Continental Industrial Park, South Coal Chemical Industry, Guanghui Minmao Lake Coal Chemical, etc.

Typical loads in the metallurgical foundry industry: electric arc furnaces, refining furnaces, intermediate frequency furnaces. These devices generate a lot of harmonics. Many users choose Dibor Electric to provide solutions and products for their power quality problems, including: Tianjin Rongcheng Iron and Steel, Fujian Nanping Aluminum Co., Ltd., Qingtongxia Aluminum Co., Ltd., Qingyuan Huanan Copper and Aluminum Co., Ltd. Shandong Steel Rizhao Steel, Tongling Nonferrous Metals Group, Xinjiang Kunyu Iron and Steel, Xinyu Iron and Steel, Wuhan Iron and Steel, etc.

The mining of mining is inseparable from the investment of large-scale electrical equipment, and the degree of qualification of electrical energy directly affects the normal operation of the equipment. Typical load of mining: hoist, long distance transmission line, frequency converter, soft starter. These devices generate a lot of harmonics. Many users choose Dibor Electric to provide solutions and products for their power quality problems, including: Continental Industrial Park, South Coal Chemical, Beijing Coal Group, Datong Coal Mine Group, Guanghui Maomao Coal Chemical, Shaanxi Shenmu Coal Chemical, Tangjiahui Coal Mine and many more.

The large-scale application of various non-linear electronic equipment devices such as inverters, rectifiers, and various switching power supplies in the modern industrial manufacturing industry has perfected the modern industrial automatic control technology and also generated a large number of harmonics. Many users choose Dibor Electric to provide solutions and products for their power quality problems, including: Sinopharm Group, AVIC Chengdu Engine, Beijing Auto City, Beijing Caoqiao Industry, Dongfang Machinery Electronics, Fengxin Industrial Park, Guizhou Zhongyan, Henan Civil Aviation Food, Global Pharmaceuticals, Kanghong Pharmaceutical, Zhangzhou High-tech Zone Pharmaceutical Industrial Park, Chery New Energy Wuhu Factory, Shizuishan Riverside Industrial Park, Yanjing Beer, China Food and Beverage Group, etc.

Typical load in a car charging station: Lighting equipment: A large number of energy-saving fluorescent lamps generate a large amount of harmonic current. When the fluorescent lamp is connected to a three-phase four-wire load, a large third harmonic current flows through the center line. Charger (pile): A large number of harmonics are generated due to the use of many rectification steps inside the charger. Many users choose Dibor Electric to provide solutions and products for their power quality problems, including: State Grid Shandong Zibo Power Supply Company New District Charging Station, Zhejiang Changxing High Speed Charging Station and so on.