Analysis of Application Cases of Jiangsu Ankerui Power Monitoring System in Hangzhou Women's Hospital
Ankerui Qingqing
Jiangsu Ankerui Electric Appliance Manufacturing Co., Ltd. Jiangyin, Jiangsu 214405
Abstract: Based on the rapid development of science and technology, people rely more and more on power resources. At this stage, the operating costs of domestic power systems are still relatively high. Therefore, it is imperative to improve the work of all aspects of the power system. 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 costs of the power system. This article describes the application of the power monitoring system in the hospital through the application of the power monitoring system of the Hangzhou Women's Hospital. .
Keywords: power system; data acquisition; hospital; monitoring system
0 Preface
Distribution automation is an integrated information management system integrating computer technology, data transmission technology, control technology, modern equipment and management. Its purpose is to improve the reliability of power supply, improve the quality of power, provide users with quality services, reduce operating costs, and reduce the labor intensity of operating personnel.
With the continuous development of the electric power network and the continuous increase in the power load, various new types of loads have emerged. Users are paying more attention to the issue of power quality. At the same time, they also put forward more stringent requirements for power quality. Users need more effective power monitoring and management solutions to meet the challenges brought about by these changes, in order to achieve a continuous, reliable, efficient and low-cost operation of the power distribution system. This article describes the application of power monitoring system in medical buildings through the construction of power monitoring in Hangzhou Women's Hospital.
1 Project Overview and Construction Objectives
Located on the bank of the West Lake, Hangzhou Maternal and Child Health Hospital is responsible for the business guidance, management and supervision of maternal and child care organizations in the nine districts and five counties (cities) in Hangzhou. It also provides training for maternity and child care workers, as well as life and health indicators for women and children. The implementation of indicators and quality indicators tasks.
At present, the hospital is responsible for the diagnosis and treatment of high-risk pregnant women in Hangzhou. It is a pregnant and maternity emergency center in Hangzhou. The hospital strictly implements the provincial and municipal price charges and maintains the low fees that our institute has consistently come to. Through strengthening medical quality management, strengthening communication between doctors and patients, implementing the principle of "mother safety, children's priority", the "patient-centered" is truly implemented in every medical link to create patient safety and a reliable medical environment. In this project, there are 9 microcomputer protection devices, 18 ACR220ELH smart meters, and 241 PZ72L-E4 power meters connected to the background monitoring system.
In the power monitoring system, the monitoring requirements mainly include the following aspects:
1. Remote observation. The system is required to accurately detect current, voltage, active power, reactive power, active power, reactive power, apparent power, power factor, frequency, switching status, and residual current.
2. Remote communications. Requires the system to be able to deliver the equipment operating status and fault information in a timely manner
3. Alarm. The system is required to set alarms for various kinds of information. 4. Display. The system is required to be able to display the operational information of each part on the spot.
2 Design of power monitoring system
In the design of the monitoring system, we must fully consider the actual needs of customers, as well as the actual structure of the power system, the actual load capacity of the power system, and other factors, and then choose a reasonable monitoring equipment, which is not only conducive to reducing the cost of system operation, but also It is conducive to the realization of system functions.
The power monitoring system of this project can realize the real-time monitoring of the low-voltage power distribution circuit in the building and is conducive to power management. On the other hand, the power monitoring system can not only accurately show the power status of the loop, but also has network communication and other functions. It can be combined with computers, serial servers and other devices to display the status of each distribution circuit in the building. When the load of the power system in the building exceeds the standard, the power monitoring system can quickly report an alarm and issue a voice prompt. In addition, the power monitoring system can also generate statistical information such as reports and graphs to facilitate the analysis of power consumption in various parts of the building so as to make the power activities in the building more secure, thereby ensuring the safety of people in the building and improving business. Personnel work efficiency.
2.1 System Structure
According to the distribution situation of newly-built shopping malls, the online monitoring system construction adopts a hierarchical distributed structure. The system includes: station management layer, network communication layer, and field device layer. The system network structure is shown in Figure 2:
The direct window of human-computer interaction between the management and management personnel of the management team and the computer calculates, analyzes, and processes various types of data collected on the site, and reflects the operating status of the site in terms of graphics, digital display, sound, etc. The upper part. Mainly by the system software and necessary hardware equipment, such as industrial-grade computers, printers, UPS power supply and other components.
The device used by the communication layer is the NPORT5630-16 serial port server. This layer is a bridge for data information exchange. It is responsible for the collection, classification, and transmission of data information sent back by field devices, and it also conveys various control commands from the upper computer to the field devices.
The field device layer is mainly connected to various types of instruments used for the collection and measurement of electrical parameters in the network, and it is also a necessary basic element for constructing the power distribution system. On-site configuration of acrel's AM series microcomputer protection devices; ACR220ELH, PZ72L-E4 power meters, to achieve the protection of each high-voltage loop alarm action information, three-phase current, three-phase voltage, frequency, power, four-quadrant electrical parameters such as electrical monitoring, low pressure The three-phase current, three-phase voltage, frequency, power, four-quadrant electric energy and other electrical parameters are monitored; and the state of each circuit breaker's closing and closing is monitored.
2.2 Network Design
The network system in the power monitoring system can transmit data in time and quickly transfer operation instructions, which is the basis for realizing various functions of the power monitoring system. Connect each device on the spot with the bus in the scene, and then connect all buses to the communication gateway to realize the transfer with the host.
2.3 monitoring system software function design
The system is designed according to the customer's actual needs and realizes a main wiring diagram interface display; electric parameter telemetering and electric parameter crossing limit alarm; event recording; system operation abnormality monitoring; fault alarm and operation record; report query and printing; system load real-time , history curve, user rights management and other main functions.
2.3.1 Data Acquisition and Processing
Data acquisition mainly includes analog and digital acquisition. The acquisition of analog quantity mainly collects the information of line voltage, current, power, power factor, frequency, etc. The collection of switch quantity is mainly the working status of the circuit breaker, isolation switch, grounding switchgear and other equipment, and the power-off protection. Alarm information such as operation faults is collected to realize local real-time display of remote data. The data processing mainly displays the electrical parameters collected according to requirements in real time and accurately to the user, so as to meet the requirements of automation and intelligence of the power distribution monitoring, and store the collected data in the database for user query.
2.3.2 Data Record
The data recording function of the power monitoring system is mainly to record the sequence of the circuit-breaker split-up state and protection action. It requires that there must be enough memory space in the system, and then a long time and a large amount of data information is recorded and stored. Secondly, the data recording function of the power monitoring system also includes the recording of fault information, that is, recording and storing the real-time current, real-time voltage and other data when the fault occurs. It can be seen that the data recording function can accurately reflect the problems existing in the system through the recording of the working status of the protection device and the recording of the fault information, thereby facilitating the solution of the staff.
2.3.3 Power Management
In order to realize the supervision of the power consumption of each circuit in the building, the system has designed a power management report. The system automatically generates daily reports, monthly reports and annual reports and prints reports according to the different names of the circuits by collecting the active power. , and can query the power consumption in a certain period of a certain loop, 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 energy-saving awareness of all registered management personnel has been greatly improved, and energy consumption has been effectively saved.
3, the significance of application of power monitoring system in power supply and distribution design
In summary, the power monitoring system helps power units to improve efficiency, reduce losses, and reduce operating costs. The power monitoring system can effectively ensure the efficiency of power grid management and reduce the cost of power operation. It also becomes an important component in the design of power supply and distribution. section. The power monitoring system's functions such as communication, fault alarm, and data storage and recording make the staff more convenient in practical work. Through the man-machine interface, the operating status of the power system can be directly understood and the operating instructions can be quickly transmitted. The transmission of data by devices is achieved through network transmission. Therefore, different power monitoring systems can be designed with different networking methods to ensure that data information can be transmitted quickly and accurately. On the other hand, in the power supply and distribution design using the power monitoring system, monitoring equipment should be selected based on the actual situation. The general power monitoring system usually uses devices with long-distance communication, remote observation, and remote control functions, while some high-end power monitoring systems require smart devices with more complete functions.
The installation of power monitoring systems in commercial buildings and other places can realize real-time monitoring of low-voltage power distribution circuits in buildings and are conducive to power management. On the other hand, the power monitoring system can not only accurately show the power status of the loop, but also has network communication and other functions. It can be combined with computers, serial servers and other devices to display the status of each distribution circuit in the building. When the load of the power system in the building exceeds the standard, the power monitoring system can quickly report an alarm and issue a voice prompt. In addition, the power monitoring system can also generate statistical information such as reports and graphs, which facilitates the analysis of power consumption in various parts of the building and makes the power activities in the building more secure, thereby ensuring the safety of people in the building and improving work. Personnel work efficiency.
references
[1] "Principles and Application Guide for Power Electronic Measurement Digital Meters", Ren Chengcheng, Zhou Zhong, China Electric Power Press
[2] "Application of Power Monitoring System in Power Supply and Distribution Design", Gao Shihong, Science and Technology
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