Application of Ankerui Power Monitoring System in Science and Technology Building of Gasibeira Compressor Co., Ltd.

【Abstract】 With the rapid development of the power industry and the country’s increasing efforts in energy saving and emission reduction of industrial enterprises, the cost of electricity for enterprises has become an important indicator for measuring modern high-efficiency factories. The application of power monitoring software has greatly improved the efficiency and management level of enterprise power consumption. This article describes the application of the Acrel-2000 power monitoring system based on network power meter in the science and technology building of Gasabella Compressor Co., Ltd. The system realizes distributed acquisition and Centralized control management of intelligent, digital, and networked power management.

Keywords :enterprise; power monitoring system; compressor; industrial plant

1. Project Overview and Construction Objectives

Gasibeila Compressor Co., Ltd. Science and Technology Building Power Distribution System 10kV/0.4kV, 0.4kV Distribution System Located in the Science and Technology Building of Gasibeila Compressor Co., Ltd., distributed in a substation, 10kV distribution system is located in the old factory area and needs to be designed. A set of power distribution and transformation network power monitoring automation system realizes the real-time monitoring of the 10/0.4KV power distribution system and transformer of the Science and Technology Building of Gasabella Compressor Co., Ltd.

The entire project in the design of the power supply and distribution system has been a good guarantee for the reliability of the enterprise's power supply, but it also requires real-time monitoring of the power supply system and power management, so that there may be potential safety hazards in the power supply system and The clear and timely understanding of the operation status of important equipment, and at the same time guide the rational and efficient use of electricity for all power equipment, and lay a solid foundation for the construction of a green factory area. The requirements of the power distribution system operation and maintenance personnel of the enterprise on the power supply and distribution system are as follows:

(1) Improve the safety and reliability of the power supply system and maintain it for a long period of time to ensure the continuity of power supply in important places;

(2) Real-time understanding of the operating status of the power supply system and possible hidden dangers, and quick troubleshooting;

(3) Reduce system line losses and increase power factor;

(4) Timely control of electricity consumption in various departments and regions, and can provide guidance

(5) Improve the automation and operation efficiency of the power supply and distribution system and save manpower

2. Design of power monitoring system

In the design of the monitoring and management system, full consideration was given to the characteristics of the enterprise itself, as well as the actual structure of the power system, the actual load capacity of the power system, and other factors, and then a reasonable choice of management equipment, which is conducive to reducing the cost of system operation, at the same time It is also conducive to the realization of system functions. The automatic power monitoring software needs to be simple and easy to operate and conforms to relevant standards and standards.

2.1 Selection of Power Monitoring Equipment

The requirements for safety and reliability of power supply include real-time understanding of the power supply system, rapid response to faults, and restoration of power supply for unexpectedly stopped power in a very short time. Therefore, a 10 kV power distribution circuit must be equipped with a microcomputer protection device to monitor the 10 kV loop in real time. Operating conditions, and in the fastest 40ms to quickly react to the abnormal situation or serious failure occurred, through the sound and light alarm signal or directly remove the serious fault point, to avoid the accident and the scope of the accident has been expanded; through the I / O module The transformer thermostat records the operating status of all circuit breakers, transformers, and equipment, such as the number of switch breaking statistics, transformer temperature, etc., and establishes equipment maintenance and repair files to prevent accidental power failure due to equipment failure; through the multi-function meter Metering, real-time record of electricity information for each electrical equipment; through the reactive power compensation controller, real-time monitoring of the power factor of the power supply and distribution system, when the system power factor is reduced, the local reactive power compensation through the automatic investment capacitor.

2.2 Power Monitoring System Network Structure

The system adopts a hierarchical and distributed system structure and is vertically divided into three layers: a monitoring layer, a communication network layer, and a field control layer. The system uses high-reliability industrial control computers and software and hardware systems, high-performance field bus technologies and network communication technologies, and the entire system is safe, stable, reliable, and easy to use and maintain.

The monitoring layer includes engineering stations and telecontrol communication stations, including monitoring computers, network switches, printers, UPS, and Acrel-2000 power monitoring software. The software part has a good human-computer interaction interface. It reads the communication management machine through the data transmission protocol. The site's various types of data information are automatically calculated and processed to reflect the operating status of the site by means of graphs, digital displays, sounds, etc.; the energy metering management function is designed to conform to the user's report format, and the data in the report is strictly measured according to various standards. , build a complete measurement system, users only need to find and print, greatly facilitate the operation and improve work efficiency. The monitoring layer is set in the duty room of 1# power distribution room as the power monitoring center of the entire plant area.

The communication network layer includes devices such as communication management machines and network switches. The network structure is shown in the following figure:

2.3 Major Design Reference Standards

GBT 14598.300-2008 "Microcomputer-transformer protection device general technical requirements"

DL/T 5430-2009 "Technical Code for Design of Remote Monitoring Center for Unattended Substations"

GB/T 50063-2008 "Electrical measuring instrument device design specifications for electrical installations"

"State Grid Corporation's 18 Major Anti-Accident Measures for Power Grids"

DL 448-91 "Management Regulations for Electric Energy Metering Devices"

ISO/IEC11801 International Integrated Cabling Standard

2.4 Power 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 remote measurement and electric parameter crossing limit alarm; event recording; system operation abnormality monitoring; fault alarm and operation record; electric energy report query and printing; system load Real-time, historical curves, user rights management and other major functions.

Data collection and processing

Intelligent real-time and high-density real-time information monitoring using high-precision smart meters and technical means, including calculation of active power, reactive power, current, voltage, total load, transformer load rate, power, power factor, etc. Reasonable control and early warning, timely detection and correction of power anomalies in operation, at any time. Set the over-standard warning value of important equipment as required. When exceeding the standard, alert and record actively.

Energy sub-item, branch road, sub-regional measurement

The electricity (lighting sockets, power, etc.) consumption will be used for itemized statistics. The realization of the sub-item report will help the user to get a clear understanding of the consumption of electricity in each sub-item; the energy consumption of each area, each team, and each circuit will be counted, and the electricity consumption will be accurately positioned. , Formulate an energy-saving performance appraisal system to promote the effective implementation of energy conservation and consumption reduction. Establish records of operation records for energy-intensive equipment, track and record the results of energy-efficiency analysis and evaluation during the operation of equipment, and combine equipment maintenance records to provide basis for equipment operation and maintenance.

Electricity management and measurement system construction

In order to realize the supervision of the power consumption of various power circuits in Xiasha Accelerator Plant, the power management report was designed for the system. The system passed the acquisition of active power, according to the different names of the circuits. According to the principle of establishing a measurement system, daily reports, monthly reports, and annual reports are generated automatically. The power consumption of each incoming circuit and outgoing circuit is reflected in the same report, and the sum of the power consumption of the outgoing circuit is calculated. Line loop error, error percentage (whether the percentage of error is excessive), etc., help users to find this abnormal power problem in time.

At the same time, the power management system can inquire about the power consumption in a certain period of a certain loop, and can help the logistics management department 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 office and production personnel in various departments has been greatly improved, and the company has effectively saved office energy consumption.

3, the significance of application of power management 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 operating costs of power. 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, the application of power monitoring systems in the design of distribution systems for buildings and enterprises should be based on actual conditions.

The establishment of power monitoring systems in industrial enterprises and other places can realize the management of sub-item, branch, and sub-area of ​​energy measurement within the company. It can not only accurately show the power status of the circuit, but also has network communication and other functions, and can communicate with computers. The serial port server and other equipments are combined to promptly display the operation status of each distribution circuit of the enterprise. When the load of the enterprise power system exceeds the standard, the power monitoring system can promptly report an alarm and issue a voice prompt. In addition, the power monitoring system can also generate statistical information, such as reports and graphs, so that the relevant personnel can analyze the power usage of various parts of the company and make the company's power activities more secure.

references

[1] Ankerui "Design and Installation of Energy Efficiency Management System Atlas"

About the author: He Meifang, female, Ankerui Electric Co., Ltd., the main research direction for the smart grid power distribution, Email: Contact: 021-69156950 QQ