Ankerui Electric Co., Ltd. Shanghai Jiading 201801 Abstract : Based on the rapid development of science and technology, people rely more and more on power resources. At present, the operating costs of domestic power systems are relatively high. Therefore, it is imperative to improve all aspects of power systems. The power monitoring system plays an important role in the entire power system. It can effectively promote the efficiency of power grid management and reduce the operating cost of the power system. This paper introduces the power monitoring system in the commercial office building through the application of the power monitoring system of Hangzhou Oceanic International Center. application. Keywords : power system; data collection; business; office building; corporate park 0 Preface Distribution automation is a comprehensive information management system integrating computer technology, data transmission technology, control technology, modern equipment and management. Its purpose is to improve power supply reliability, improve power quality, provide quality services to users, reduce operating costs, and reduce the labor intensity of operators. With the continuous development of power networks, the continuous increase of power load, various new types of loads continue to emerge, users pay more attention to power quality issues, but also put more stringent requirements on power quality. Users need more effective power monitoring and management solutions to meet the challenges of these changes in order to achieve continuous, reliable, efficient and low-cost operation of the distribution system. This paper introduces the application of power monitoring system in commercial office buildings through the construction of power monitoring in Hangzhou Oceanic International Center. 1. Project overview and construction goals Located in the center of Hangzhou, Ocean International Center is located in the core of Gongshu District. It is located on the Beijing-Hangzhou Grand Canal. It is adjacent to Daguan Road in the south, Lishui Road in the west, Datun Street in the north and Shangtang Road in the east. It is about 4 kilometers from Wulin Square and the municipal government, and the bus time is about 15-20 minutes. It is about 6.5 kilometers away from Hangzhou East Railway Station in the east and about 10 kilometers away from Hangzhou Xixi Wetland in the west. It is in the very advantageous main city. Ocean International Center has built a 200,000-square-meter corporate park, which is the benchmark for business in the north of Hangzhou. The whole project includes 4 plots of B03 plot, B04, B05 and B06. B03 includes B03-1 and B03-2 to design a power monitoring system, and B04, B05 and B06 set up a power monitoring system. In this power monitoring system, the monitoring requirements mainly include the following aspects: (1) Data acquisition and processing: real-time collection of various power parameters, switching quantities and temperature quantities, electricity meter reading, etc. through the interval layer unit; (2) Screen display: position status, displacement information, protection device action and reset information of all devices, information of DC system and variable system used, real-time data of each measured value, various alarm information, status information of computer monitoring system ; (3) Recording function: It has a memory function for various historical data, which can be queried, reviewed and printed at any time. (4) Alarm processing: Users can classify and filter alarms according to their own wishes, and classify the alarms into different alarm windows. According to different alarm levels, the sounds of the launch screen, light display, stripe flicker and different sound levels are used. Call the police; (5) It should have perfect user management functions to avoid unauthorized operations; (6) Historical curve display: can display any analog quantity, electrical metric and historical waveform diagram of the bus voltage stored in the historical database at any time; (7) Report printing function: callable printing, timed printing of various historical data, operating parameters, accident report statistics, electrical measurement statistics report, main wiring diagram, load curve. 2. Design of power monitoring system In the design of the monitoring system, it is necessary to fully consider the actual needs of the customer, as well as the actual structure of the power system, the actual load capacity of the power system, etc., and then rationally select the monitoring equipment, which is beneficial to reduce the cost of the system operation, and also Conducive to the realization of system functions. Real-time monitoring of the low-voltage distribution circuit is conducive to power management. On the other hand, the power monitoring system can not only accurately indicate the power consumption status of the circuit, but also has the functions of network communication, etc., and can be combined with computers, serial servers and other devices to display the operation status of each power distribution circuit in time. When the load of the power system is exceeded, the power monitoring system can quickly alarm and issue a voice prompt. In addition, the power monitoring system can also generate statistical information such as reports and graphs, so that relevant personnel can analyze the power consumption status of each part, and make the power activities of the entire Ocean International Center more reliable. 2.1 System Structure According to the distribution of the Ocean International Center and the distribution of the distribution room, the power monitoring system construction adopts a layered and distributed structure. The system includes: station control management layer, network communication layer and field equipment layer. The system network structure is shown below: The operation parameters of 1# distribution room are directly connected to the duty room of 1# distribution room through 485 bus, and the operating parameters of 2# distribution room are transmitted to the duty room of 1# distribution room through optical fiber. The station controls the management personnel to directly interact with the computer for human-computer interaction, calculate, analyze and process all kinds of data information on the collected site, and reflect the operation status of the site in the form of graphics, digital display, sound, etc., which is the most Upper part. Mainly consists of system software and necessary hardware equipment, such as industrial grade computers, printers, UPS power supplies and so on. The device used in the communication layer is an industrial serial server. This layer is a bridge for data information exchange. It is responsible for collecting, classifying and transmitting the data information returned by the field devices, and at the same time relaying various control commands of the host computer to the field devices. The field device layer is mainly connected to various types of instruments used for electrical parameter acquisition and measurement in the network, and is also a basic component necessary for constructing the power distribution system. According to the actual characteristics of the project, the ACR330ELH is designed for the incoming circuit of the low-voltage distribution circuit during the design of the project, and the PZ series intelligent instrument is designed for the outlet circuit to realize the voltage, current, power, power factor, electricity and harmonics of the incoming circuit. The isoelectric parameters are used to realize the electric parameters such as the voltage, current, power, power factor and electric power of the outlet circuit, and the closing state of each circuit breaker is monitored. 2.2 monitoring system software function design The system is designed according to the actual needs of the customer, and realizes a main wiring diagram interface display; electrical parameter telemetry and electrical parameter over-limit alarm; event record; system operation abnormal monitoring; fault alarm and operation record; report query and printing; system load real-time Main functions such as history curve and user rights management. 2.2.1 Data collection and processing Data collection mainly includes analog quantity and digital quantity acquisition. The analog acquisition is mainly to collect information such as line voltage, current, power, power factor, frequency, power quality, etc. The collection of the switch quantity is mainly the working state of the circuit breaker, the isolating switch, the grounding knife and other equipment, and Alarm information such as power failure protection and operation failure is collected to realize local real-time display of remote data. The data processing mainly displays the electric parameters collected as required in real time to the user, and achieves the automation and intelligent requirements of the power distribution monitoring, and simultaneously stores the collected data into the database for the user to inquire. 2.2.2 Data Recording The data recording function of the power monitoring system is mainly to record the switching state of the circuit breaker and the sequence of protection actions. It requires sufficient memory space in the system, so that the data information is recorded and stored for a long time. Secondly, the data recording function of the power monitoring system also includes recording of fault information, that is, recording and storing data such as real-time current and real-time voltage at the time of occurrence of the fault. It can be seen that the data recording function can accurately reflect the problems existing in the system by recording the working state of the protection device and recording the fault information, thereby facilitating the staff to solve. 2.2.3 Remote operation The remote operation of the power monitoring system includes remote monitoring, remote communication, remote control and other links to realize remote control of the power system, enabling the staff to remotely observe the current, voltage and other information, analyze the system failure, and protect the device. The status is evaluated, which makes it easier for the staff to operate the equipment such as the isolating switch remotely, which greatly reduces the workload of the staff. However, in the power supply and distribution design, not only the power monitoring system but also the manual operating system must be designed. When the power monitoring system fails, it can be processed manually. 2.2.4 Power Management In order to realize the supervision of the electricity consumption of each loop in the mall, the system designed the electricity management report. The system automatically generates the daily report, the monthly report and the annual report and prints the report according to the collection of the active energy. Function, and can query the electricity consumption in a certain period of time of a certain loop, which can help the property to establish an effective energy management assessment system. Through the construction of the system and the establishment of the system, the awareness of energy conservation of the managers who have settled in the store has been greatly improved, and the energy consumption of the business office has been effectively saved. 3. Significance of applying power monitoring system in power supply and distribution design In summary, the power monitoring system helps the power unit to improve efficiency, reduce losses, and reduce operating costs. The power monitoring system can effectively ensure grid management efficiency, reduce power operation costs, and become an indispensable component in power supply and distribution design. section. The power monitoring system's communication, fault alarm, data storage and record functions make the staff more convenient in actual work. They can directly understand the operating status of the power system through the man-machine interface, and can quickly transmit the operation commands. The data transmission of the equipment is realized through network transmission. Therefore, different power monitoring systems can design different networking modes to ensure that data information can be transmitted quickly and accurately. On the other hand, in the power supply and distribution design, the power monitoring system should be used, and the monitoring equipment should be selected according to the actual situation. Generally, power monitoring systems usually use devices with functions such as remote communication, remote observation, and remote control, while some high-end power monitoring systems require smart devices with more complete functions. Can manage. On the other hand, the power monitoring system can not only accurately indicate the power consumption status of the circuit, but also has the functions of network communication, etc., and can be combined with computers, serial servers and other devices to display the operation status of each power distribution circuit in the building in time. When the load of the power system in the building exceeds the standard, the power monitoring system can quickly alarm and issue a voice prompt. In addition, the power monitoring system can also generate statistical information such as reports and graphs, so that relevant personnel can analyze the power consumption status of various parts in the building, and make the electricity activities in the building safer, thus ensuring the safety of the people in the building and improving the office. Staff efficiency. references: [1] "Application of Power Monitoring System in Power Supply and Distribution Design", Gao Shihong, Technology Wind [2] "Power Monitoring for 10kv Power Supply and Distribution Design", Yao Qiang, Technology World Spunmelt Nonwoven Production Line Spunmelt Nonwoven Production Line,Spunmelt Non Woven Machine,Pp Spunbond Machine,Spunmelt Nonwoven Fabric Making Machine Changzhou Puyisen Machinery Technology Co., Ltd. , https://www.czsmmsmachine.com
