Xu Shuang Ankerui Electric Co., Ltd.    Jiading 201801 1 Introduction At present, with the development of technology, the degree of automation of business hotels is getting higher and higher, and more and more automatic control devices. EIB intelligent lighting system has gradually become the standard configuration of high-end business hotels. At the same time as the energy-saving inverter widely used in air conditioning systems and elevators. However, the above devices generate a large number of harmonics during operation. For example, inverters have both rectifiers and high-frequency inverters, and generate a large number of harmonics at high and low frequencies simultaneously. Harmonics have been accompanied by electromagnetic interference and power factor reduction and are classified as the three major hazards of the power system. Therefore, the measurement and analysis of harmonics is an important task in power system analysis and control, and it is an important prerequisite for relay protection and fault measurement.  2 Harm of Harmony in Business Hotel The non-linear load of a commercial hotel objectively generates high-order harmonics. Due to the large amount of harmonics , it will not only cause pollution to the power supply grid, but also adversely affect the communication and power equipment of the business hotel . 2.1 Hazards to the Power Supply Network Contamination of the power supply grid causes additional losses in the components of the grid, reduces the efficiency of power generation, distribution, and use of electrical equipment, and even causes overheating of the line; as a result of harmonics in the current, it also affects the grid voltage. The total harmonic distortion rate of the grid voltage also exceeds the national standard. 2.2 Hazards to the operation of a business hotel (1) Additional loss to the equipment itself, affecting the normal operation of business hotel electrical equipment, producing mechanical vibration, noise, overvoltage, overheating of transformers, capacitors, wires and other equipment, insulation aging, and shortened life; ( 2 ) It causes interference to nearby communication systems. Light causes noise and reduces communication quality. In severe cases, information is lost, making the communication system unable to work. ( 3 ) Due to the logistical requirements of the business hotel, the frequent start and stop of the load caused a surge in the power grid and serious transients. The abrupt changes in voltage and current can cause overvoltages, which greatly shortens the lifespan of electrical equipment, and virtually increase equipment investment costs. ( 4 ) Current Harmonic Index has exceeded the standard significantly, and the EIB  Such systems cause a certain impact and often cause system failures for no reason. 3, business hotel harmonic solutions To ensure the high reliability requirements of business hotels operating in the design and construction phases, mainly taking the following measures to prevent harmonic interference to the device. (1) Design of specific loop-powered electronic device, to avoid harmonic interference in the supply line as fleeing. (2) the installation of the device is susceptible to interference line filter, a harmonic component eliminated or suppressed, the power to purify. (3) remote from such equipment wiring lines serious harmonic current distortion as possible to avoid electromagnetic interference space. However, these measures are not the source of harmonic pollution into line treatment. According to the national standards for harmonics in power grids, ANAPF Low-Voltage Active Filters can be used to eliminate harmonics from the standpoint of improving system power quality, ensuring equipment safety and normal operation, and comprehensively improving equipment operation efficiency and power energy use efficiency. Can effectively and cleanly absorb the harmonics and surges in the line. To optimize the power quality of the line, reduce harmonic hazards, achieve protection of equipment operation, and save electricity. 3.1 How ANAPF Works ANAPF series active power filter devices are connected to the power grid in parallel and detect harmonics and reactive components of the load in real time. PWM inverter technology is used to generate one current harmonic component and reactive component from the converter. The inversion component is injected into the power system in real time, so that harmonic control and reactive power compensation are realized. The ANAPF principle is shown in Figure 1: Figure 1  ANAPF schematics 3.2 ANAPF technical parameters Table 1: ANAPF Technical Parameters Wiring Three-phase three-wire or three-phase four-wire Access voltage 3×380V ±10% Access frequency 50Hz ±2% Dynamic compensation response time Dynamic response < 4ms , full response time < 20ms ; On-off level 10kHz Function settings Only harmonics are compensated, only reactive power is compensated, both harmonics are compensated and reactive power is compensated; manual and automatic switching are performed. Harmonic compensation times 2-21 times Type of protection DC over-voltage IGBT over-current device temperature protection Overload protection Automatic current limit in the set value, no overload occurs cooling method Smart air cooling noise < 65db ( in the cabinet and operating in the rated state ) Working temperature -10 °C to +45 °C Working environment humidity < 85% RH non-condensing Installation occasion Indoor installation Altitude ≤1000m (for derating at higher altitudes) Incoming and outgoing ways Down in and out Protection level IP21 Intelligent communication interface RS485/MODBUS-RTU Remote monitoring Optional Overall size (mm) (W×D×H) 30A 50A 75A 100A 600×500×1500 600×500×1500 600×500×1800 800×600×2200 Weight (kg) Three-phase four-wire Three-phase three-wire 30A , 50A 75A , 100A 30A , 50A 75A , 100A 280 360 240 290 4. Application of ANAPF Low Voltage Active Filter in Business Hotel The business hotel has a total construction area of 200,000 square meters. The central air-conditioning and elevators are all variable-frequency drives. Several large-scale data centers are equipped with UPSs , and the entire building is equipped with EIB intelligent lighting systems. The magnitude of the load of the load device Hotel nonlinear transformer and each corresponding harmonic distortion, the active filter arranged ANAPF next distribution transformer busbar room, central air conditioning chiller inverter. Second active filter configuration ANAPF next important equipment in the control room, weak engine room, presidential suite rooms. The comparison and analysis of power quality test conditions of the distribution system before and after the operation of the ANAPF active filter at the distribution transformer busbar in the power distribution room is given as an example to describe in detail . 4.1 Before and after the operation of the active filter ( 1 ) The distortion of the current waveform before the input of the active power filter is serious. The harmonic content of the three-phase current is respectively 30.5% , 35.2% , and 29.7% . The three-phase currents are 147A , 168A , and 148A , and the neutral current is 1A . After the input current waveform distortion marked improvement (2) active filter, the three-phase current harmonic content is significantly lower, 3.1%, 4.1%, 3.7%, respectively, three-phase currents 144A, 168A, 148A, the The line current is 1A . 4.2 Active filter test data before and after being put into operation 5 ANAPF Low Voltage Active Filter Quotation and List of Major Components Model Number: ANAPF100-400/B Reference price: 120,000 yuan/set The main product details: No. Name Model number Quantity 1 APF electrical cabinet 800X600X2200 1 2 Converter APFCOV-CVT100 1 3 Controller APFMC-C100 1 4 Reactor APF-RE.(S)DG-100 1 5 Active current transformer LT208-S7 3 6 filter DL-1TH1 2 7 breaker CVS160FTM160D4P3D 1 8 Contactor LC1D150M7C 1 9 MCB NDM1-63C32 1 10 Intermediate relay MY4NAC 2 11 R type transformer R320-0.38/0.22 1 12 Harmonic Detector ACR350EGH 1 13 wire 16mm2 Some 14 wire 4mm2 Some 6 Conclusion This paper analyzes the harmonic harm to the business of the hotel, introduces the principle of active filter and low pressure ANAPF function, by a low-voltage distribution systems business hotel in application case active filters, active filters before and after the analysis of the harmonic operational Wave governance. The active filter has improved the harmonics of the business hotel , improved the power quality, and generally improved the operating efficiency of the equipment and the use efficiency of the electric energy. ã€references】 [1] Zheng Guoxing. Institute of Architectural Design, Zhejiang University. Harmonic Protectors and Their Applications in Intelligent Buildings. Modern Architecture, 2007 : 55-58 [2] Shanghai Ankerui Electric Co., Ltd. Product Manual. 2013.01. About the Author: Xu Shuang, female, undergraduate, Ankerui Electric Co., Ltd., the main research direction for the smart grid power distribution, Email: Mobile QQ "AAPF Active Power Filter Device Design and Application Atlas" (atlas number: ACR13CDX701) is edited by Ankerui Electric Co., Ltd. This atlas combines the characteristics of ANAPF active power filter device products, based on electrical design specifications, research Eliminating the problem of high-order harmonics in the power supply and distribution system to achieve the goal of improving the quality of power supply and ensuring the safe operation of the power system. The Atlas is applicable to the design and modification of harmonic suppression and comprehensive management of electrical equipment in industrial, civil, and public buildings in new construction, reconstruction, expansion, and technological transformation projects. If you need atlas, please provide your organization's name, department, address, zip code, contact person, contact telephone number, email address, fax 021-69155331, mail or QQ to Ankeru Xu cream engineer, Ankerui Electric will give you a free gift. . 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