Application of acre-2000 power distribution monitoring system in Sheraton Hotel Wenzhou

Miao Jianmei 1 Ankerui Electric Co., Ltd., Shanghai 201801 Abstract: This paper introduces the application of ankerui's intelligent instrument and acrel-2000 electric power monitoring system in intelligent building engineering ACR series and PZ series instruments are used in the field layer to collect the electric parameters of each circuit of the power distribution system, and artu-k32 series multi circuit remote signaling device is used to collect the switch signals The field instruments are transmitted to the background electric power monitoring system after communication networking, and through acrel-2000 electric power monitoring system The system realizes remote telemetry, remote signal automatic monitoring, so as to realize the automatic management of power transformation and distribution system Key words: acrel-2000 power distribution monitoring system for smart instrument switch acquisition of Sheraton Wenzhou Hotel overview Sheraton Wenzhou Hotel, formerly known as Wenzhou Jinxiu Holiday Hotel, is jointly built by Wenzhou Jinxiu hotel investment company and Starwood group, with a direct investment amount of more than 300 million RMB Sheraton Wenzhou hotel is located at the intersection of Station Avenue and Jinxiu road in Wenzhou City It is located in the center of Wenzhou City It is the second high five hotel in Wenzhou, covering an area of 7600 square meters, with a total construction area of 46000 square meters It is mainly composed of 2-story basement, 25 story main building and 5-story podium The design of the distribution monitoring system of Sheraton Hotel in Wenzhou is undertaken by Shanghai ankerui Electric Co., Ltd as a part of its building automatic control system, the monitoring range of the distribution monitoring system covers the power instruments installed on all high and low voltage switch cabinets in the distribution room, four transformer temperature and humidity controllers and emergency generators Sheraton Wenzhou hotel has two distribution rooms, one large and one small, which are located on the 3rd floor of the podium, and the emergency generator is located on the 2nd floor of the underground of the podium 6 sets of ABB rex521 microcomputer protection devices, 7 sets of acre acr320ek network power instruments, 128 sets of acre pz96-e4 programmable intelligent instruments and 4 sets of ld-b10 transformer temperature and humidity control instruments within the monitoring range of the distribution monitoring system are centralized in two distribution rooms The UK deep sea 5220 emergency generator is located in the generator room on the second basement of the podium Its operation data is collected by 555 control module and uploaded to the upper monitoring host 1 The system is composed of acre-2000 distribution monitoring system, which adopts hierarchical and distributed structure The main equipment of the field equipment layer is: multi-functional network power instrument, microcomputer protection device, transformer temperature and humidity controller and emergency diesel generator control module 555 These devices respectively correspond to the corresponding primary equipment or are installed in the electrical cabinet or on the equipment cabinet body RS485 communication interface is adopted for network communication through shielded twisted pair on site to realize data collection on site The communication control layer is mainly: communication server, whose main function is to collect the data scattered in the field collection device, after completing the conversion of data transmission protocol (RS485 converted to RS232), it is transmitted to the monitoring host of the station control layer, to complete the data interaction between the field layer and the station control layer Station control management layer: equipped with high-performance industrial computer, display, UPS power supply, printer and other equipment The monitoring system is installed on the computer to collect and display the operation status of the field equipment, and display it to the user in the form of human-computer interaction The above network instruments all adopt RS485 interface and MODBUS-RTU communication protocol on site The communication interface is half duplex communication, that is, both sides of the communication can receive and send data, but can only send or receive data at the same time, and the data transmission rate is 10Mbps RS-485 interface is a combination of balanced driver and differential receiver, which has enhanced anti-noise interference ability It is allowed to connect up to 32 devices on the bus, and the large transmission distance of Zui is 1.2km 2 System function 2.1 data acquisition and processing data acquisition are the basis of power distribution monitoring The data acquisition is mainly completed by the field measurement and control layer instrument acquisition to realize the local real-time display of remote data The signals to be collected include: three-phase voltage u, three-phase current I, frequency Hz, power P, power factor cos φ, electric degree EP, operation status of remote equipment, etc The main purpose of data processing is to display the electrical parameters collected according to the requirements to users in real time and accurately, so as to meet the requirements of automation and intelligence of power distribution monitoring 2.2 the establishment and query of the database mainly completes the remote measurement and remote signal timing acquisition, and establishes the database The collected real-time data is stored in the database every certain time for the customer to query according to the time 2.3 historical data and real-time data output when customers query data, they can choose to output the report as an excel document or print it directly for archiving 2.4 fault alarm and accident recall in case of operation failure of power distribution system, the power monitoring system will send out audible and visual alarm within 0.3 seconds to prompt the user to respond to the fault circuit in time, and automatically record the time and location of the event for the user to query and recall the cause of the fault 2.5 the operation load curve collects the current load parameters of the incoming line and the important circuit at a fixed time, and automatically generates the operation load trend curve, so as to facilitate the user to understand the real-time and historical operation load conditions of the equipment 2.6 the network access distribution monitoring system can be accessed remotely through IE browser, which is convenient for the hotel management company to view and process the operation data of the distribution system outside the central monitoring room 2.7 user authority management for different levels of users, set up different authority groups to prevent the loss of hotel operation management caused by human error, and realize the safe and reliable operation of power distribution system 2.8 the above figure of operation interface shows the operation of 10kV distribution circuit The above figure shows the real-time temperature of transformer, and the above figure shows the real-time alarm information Automatically generated electric parameter report system load curve 3 Project analysis: the monitoring host of the system is placed in the monitoring center on the underground floor of the podium, which is parallel to the fire control and security systems In addition to the local monitoring, the authorized users can also access it remotely through the LAN of the hotel management company The main demand of the user is to monitor the real-time operation status of the distribution system, requiring low delay acquisition of three-phase voltage u, three-phase current I, frequency Hz, active power P, reactive power Q, power factor cos φ, active power EPI, remote equipment operation status and other data At the same time, it also pays more attention to the power consumption of the power supply circuits of the banquet hall and guest rooms on the 5th floor of the main building In order to ensure the real-time data acquisition, the number of instruments on each RS485 bus shall not exceed 20 The switching state of 10kV circuit (opening and closing, grounding knife, etc.) is directly collected from ABB integrated protection The opening and closing signal and fault signal detection function of 0.4kV circuit are additional functions Shielded four core wire is used to connect from the passive dry contact reserved by the complete electrical manufacturer, which is collected by acre artu-k32 multi circuit switch value monitoring device and uploaded through RS485 field bus On the basis of the completion of the above functions, according to the user's needs, the needle printer is used to automatically print and output the report of power consumption of the main power distribution trunk line of the main building every 4 hours, and the report of power consumption of the guest room floor is automatically printed at the end of each month, further simplifying the operation of the attendant and avoiding the hotel management problems caused by misoperation 4 concluding remarks With the development of society and the wide application of electric power, the automatic management of distribution system has become an inevitable choice for large-scale public buildings The application of electric instrument and acrel2000 electric power monitoring system introduced in this paper in the distribution of Sheraton Hotel in Wenzhou can realize the real-time monitoring of the accessory system, which can not only display the electric status, but also have the function of network communication, and can be connected with BA (building) Automatic control) system consists of power monitoring and energy consumption management system The system realizes the analysis and processing of the collected data, and can generate various reports, analysis curves and graphs with one key, which is convenient for remote meter reading, analysis and research The system is reliable and stable in operation, and is well compatible with the electrical equipment of domestic and foreign companies (such as ABB company, British deep sea company, etc.) It has been successfully applied in many large-scale public buildings and achieved good economic and social benefits Reference Ren Zhicheng, Zhou Zhong, principle and Application guide of electric power digital instrument, China Electric Power Press, 2007.4, author's profile: Miao Jianmei, female, bachelor's degree Employer: currently working in arcre Electric Co., Ltd.,,,: http://it.shacrel.cn