Taking Zhejiang Rongjun Hospital as an example, this paper introduces the particularity and importance of the medical service for large-scale general hospitals to the logistics power supply security requirements, and applies real-time computer monitoring technology to realize real-time monitoring of the hospital power supply system, greatly improving the reliability of the power supply and distribution system. Scientific rationality of sex and management.
Yang Junjun
Ankerui Electric Co., Ltd. Shanghai Jiading
1. Project Overview
Zhejiang Rongjun Hospital (the third hospital of Jiaxing City) is a provincial-level special care hospital directly under the Civil Affairs Department of Zhejiang Province. It provides medical, recuperation and rehabilitation services for the disabled soldiers of the first to fourth grades in the province. Dedicated military personnel and other key special care recipients provide short-term health care services and provide public welfare medical services for the resident people. The hospital is located in Jiaxing, the birthplace of the party. It is a large-scale comprehensive hospital integrating medical treatment, scientific research, teaching and rehabilitation. It is one of the six public welfare medical institutions of Jiaxing City. The hospital is located at the junction of Erhuan West Road and Shuangyuan Road in Jiaxing City (No. 309 Shuangyuan Road; No. 589, West Central Road). It covers an area of ​​101.7 mu, with a construction area of ​​55,000 square meters, 600 beds, and more than 550 employees. There are more than 30 clinical medical, medical technology departments and 11 wards and medical check-up centers such as internal medicine, surgery, orthopedics, rehabilitation, geriatrics, ophthalmology, and ICU.
Zhejiang Rongjun Hospital power supply system, designed six dry-type transformers for power supply, using high supply and high meters. A total of two power distribution rooms, a set of high-voltage switchgear in the 1# electric room, a total of 6 sets, using DC microcomputer protection, a total of 6 sets, DC screen for floor-standing, transformers using dry-type transformers, a total of 106 low-voltage distribution Electrical circuit; a total of 22 low-voltage distribution circuits in the 2# electric room.
2. Preliminary plan assumptions
With the rapid development of medical electronic and electrical technology, modern medical care has begun to rely more on electrical and electronic equipment. These advanced equipments are increasingly demanding the hospital's electrical environment. The past power distribution design is far from meeting people's requirements for safety and security. Especially in some important places such as the operating room, there are a large number of devices that touch the organs such as the human body and the brain. If electrical failures such as power interruption occur, it is likely to endanger the safety of human life. Therefore, correctly planning the various equipment and lighting power of the hospital, scientifically and rationally designing the power supply and distribution routes and solutions, is of great significance and role in ensuring continuous, safe and reliable power supply and preventing the harm caused by power failure. Therefore, the intelligent power distribution system achieves the predetermined goals in the following aspects:
1) Add a power distribution monitoring system to the existing basic conditions;
2) Master the operation of the power equipment of the substation;
3) A unified monitoring platform can be realized within the system, which can obtain real-time data of all parameters in the system; intelligent management of the entire power supply and distribution system can safely and reliably operate all electrical equipment in the power distribution system. Accurate real-time monitoring and control, system failure, abnormal real-time alarm and fault remembrance function.
4) Report on various status monitoring and historical data in the power management system. The system can design and manage multiple report styles to realize daily, weekly, monthly and annual load report management;
5) It can strengthen the statistical analysis and summary of power load control and energy cost.
6) Realize the comparison of unit energy consumption, important load comparison, energy consumption of similar load, analyze by chart, bar graph and graph, and realize visual management;
7) It is possible to formulate corresponding energy consumption indicators for each department to raise public awareness of energy conservation;
8) Improve the accuracy and real-time performance of energy statistics;
9) Realize the assessment of energy energy consumption indicators and structural analysis of power consumption and the sharing of power consumption costs;
10) Accurate and timely event sequence recording, summary, classification, delivery or reporting of various charts, and printing, saving and disc burning storage functions.
11) Optimize equipment operation and reduce maintenance costs;
12) Effectively control the cost of electricity consumption;
13) Improve the efficiency of electrical system operation and management;
14) Data logging and fault data recording;
15) To realize the data web browsing function, the leaders at all levels of the hospital can view the energy consumption of the hospital on the network under certain authority;
16) Improve the efficiency of the operation and management of the distribution system and greatly improve the management level;
17) It is possible for companies to find opportunities for energy conservation;
18) The expansion and interconnection of information can be realized, and seamless connection with other systems can be realized;
19) Implementing no or few people on duty at each substation;
3, design plan
3.1 Design Standards
IEEE Institute of Electrical and Electronics Engineers Standard
IEC International Electrotechnical Commission Standard
ISO International Standards Association Standard
GB National Standard of the People's Republic
DL People's Republic of China Ministry of Power Industry Standards
IEC8705 telecontrol equipment and system transmission protocol
GB/T15532-1995 "Computer Software Unit Test"
GB/T13729-1992 "General technical conditions for telecontrol terminals"
GB/T15153-94 "Remote equipment and system working conditions, environmental conditions and power supply"
DL/T630-1997 "General technical conditions for AC sampling telecontrol terminal"
GB/T17626.8 "Noise immunity test of power frequency magnetic field"
GB/T14598.10-1999 "Rapid transient interference test"
DL476-92 "Power System Real-Time Data Communication Application Layer Protocol"
GB2887-1992 "Technical Requirements for Computer Sites"
DL/T 698 "Power Information Collection and Management System"
DL/T 698.1-2009 Part 1: General
DL/T 698.2-2010 Part 2: Technical specifications for the main station
DL/T 698.31-2010 Part 3.1: Technical specification for power information collection terminals - General requirements
DL/T 698.35-2010 Part 3-5: Technical specification for power information collection terminal - Particular requirements for low-voltage set meter reading terminal
DL/T 698.41-2010 Part 4-1: Communication protocol - Communication between the primary station and the energy information collection terminal
DL/T 698.42-2010 Part 4-2: Communication Protocol - Concentrator Downlink Communication Protocol
DL/T/814-2002 Distribution Automation System Functional Specification
GB/T/3047.1 Basic size series of panels, shelves and cabinets
DL/T5137-2001 "Technical Regulations for Design of Electrical Measurement and Energy Metering Devices"
GB2887 computing station site technical conditions
3.2 system structure
The entire system adopts a set of Acrel2000 power monitoring system, which adopts layered and distributed structure, namely field equipment layer, network management layer and monitoring management layer, as shown in the following figure:
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The whole power monitoring system monitoring management layer includes power monitoring host, printer, UPS power supply, etc. The core Acrel2000 power monitoring software of the whole system is installed in the power monitoring host. The UPS power supply is used as the uninterruptible power supply. When the power supply of the device fails, the power monitoring can be guaranteed. The host is running normally and the running data is not lost.
The data acquisition required for power distribution is mainly collected by PZ80 programmable intelligent electrical meter, microcomputer protection and other devices. These acquisition devices can independently perform functions such as measurement, control, alarm, communication, etc. When a device has a problem, it will not affect other devices. normal operation. All of these devices have a 485 communication interface that can be connected to the network layer via the RS485 bus.
For the 2# power distribution room is far away from the duty room, the bottom monitoring device has RS485 interface, the network communication medium uses shielded twisted pair cable, the communication protocol uses Modbus communication protocol, and the data is transmitted to the Ethernet gateway through RS485 bus; the upper layer network communication medium Using optical fiber transmission, the communication management machine processes the collected data and sends it to the power monitoring room located in the 1# distribution room via the optical transceiver and optical cable; the monitoring equipment of the high-voltage and low-voltage distribution system in the 1# distribution room is located beside the duty room. All monitoring devices have RS485 communication interface, the network medium adopts shielded twisted pair cable, the communication protocol adopts Modbus communication protocol, and the data is transmitted to the communication management machine of the duty room through RS485 bus mode. The upper layer communication medium uses super five types of lines, communication management machine. After the collected data is processed, the network signal of the TCP/IP protocol is uploaded to the monitoring room of the total matching room.
The entire power distribution system is based on the computer station control management system, using modern communication technology to uniformly manage the power consumption status of the entire power distribution system, real-time monitoring the power consumption of each link and each type of equipment; real-time monitoring and supervision of electric energy Quality, timely detection of power failures, avoiding waste of electricity.
3.3 system function
Data collection and management
Data acquisition and processing is the basis for safety monitoring and control of power distribution systems. The monitoring system can collect analog (current, voltage, power, electricity, frequency, etc.) and switching quantities (circuit breakers and isolating switches) of electrical equipment in real time and at regular intervals. Position signal, relay protection and automatic device signals, equipment operating status signals, and various event information, etc.). The monitoring system software can directly read the data collected by the power parameter measuring instrument, the power quality monitoring device and the third-party equipment (such as the comprehensive protection device) of each power distribution station through the network, and can display, count, and collect all the collected data. Analysis, calculation and storage. Calculate the power factor of each line in real time.
Calculate the active and reactive power values ​​of each line in real time.
Calculate the active and reactive maximum, minimum and average values ​​of daily and monthly lines in real time.
Real-time display and statistics of the electrical values ​​of each period of each loop, time-based billing statistics for energy data, and various types of time-based billing (point, peak, valley, flat value, etc.) and rate types according to user requirements . Real-time display and statistics of the total value of active energy and total reactive power per day, month and year of each loop
The switching state of the capacitor and the manual/automatic state are displayed in real time.
The data collection period, mode, parameters, etc. can be defined online by the user, and the change of the state quantity is preferentially transmitted.
Information processing
The real-time data collected by the signal acquisition system is statistically analyzed, analyzed, and calculated, and the data is periodically stored. For the same period of electricity units, different power units in the same period of electricity consumption statistics; as a management platform for electricity costs, compared with the actual electricity costs; according to the power generation of diesel generators, the estimated fuel consumption.
Clearly reflect the electricity consumption of all departments of the hospital, establish a benchmarking department, and compare with the benchmarking department, find the steps of stealing electricity, leakage, long-lighting, and unused equipment power-off; evaluation of energy-saving effects of different energy-saving schemes Conducive to the selection of energy-saving measures, can also be used as a measurement system for contract energy management projects;
The energy report realizes the time-based query of all energy data, and is divided into several types such as minutes, hours, days, and months;
Power summary table, all monitoring equipment power summary, query by time period, automatically calculate the power consumption at any time;
Print and export, all reports and interfaces can be printed, or exported in EXCEL, WORD format;
The power summary is shown below
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Screen display
As a human-computer interaction interface, the 19-inch color LCD displays real-time information on various information screens of the power distribution system, including the current status of each circuit breaker and the current voltage, current, and power measurements of each circuit. Sound and light prompt alarm information, protection device action and reset information. The following figure shows the primary power distribution system of the low-voltage power distribution room:
.png)
Electricity trend
Draw a trend graph for any measured parameter: current, voltage, power, etc. By using the power curve, you can display the peak value of the demand and find the dangerous load trend or the remaining capacity of the system. The load curves for different time periods can be aggregated or compared to track the cost of electricity consumed per circuit per unit of electricity. The power trend is shown below:
.png)
Alarm and control
When there is a switch displacement accident, telemetry limit, protection action or other alarm signal, the system will give an audible prompt and automatically pop up an alarm screen. The alarm can be reset after the operator confirms, and the alarm system is recorded in the monitoring database. When the switch is displaced, the time alarm window and the fault related screen are automatically pushed out. The position switch in the screen flashes, the color change prompts and there is an alarm statement with the Chinese character prompt and the current displacement status in the alarm box, and the position of the displacement switch is indicated. , run number and nature (normal operation or accident trip). When the current/voltage limit occurs, the screen flashes and the current limit value is displayed in the alarm prompt box. The monitoring system automatically stores historical data and historical events. Users can customize the query according to the device, data type, time period and other items. In addition to computer alarms, the system also has a special sound and light alarm to remind the on-duty personnel.
4 Conclusion
The Acrel2000 power monitoring system used in the project has been officially put into operation in 2014. The whole system is stable and safe, which greatly facilitates the use of users, provides a large amount of real-time and accurate power data, and conducts internal measurement for managers. The safe use of electricity has only been based on the basis, further ensuring the scientific and stability of the hospital's power supply system, and laying the foundation for the implementation of energy-saving management in the future.
references
Ren Zhicheng, Zhou Zhong. Principles and Application Guidelines for Digital Measurement of Electric Power Measurement [M]. Beijing. China Electric Power Press. 2007.4
About the Author:
Yang Junjun, female, undergraduate. Position: Now working for Ankerui Electric Co., Ltd., contact number, mobile phone, QQ
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