1. Project Overview

Weihai Thermal Power Group is responsible for 80% of the heating area in Weihai City. At present, it has a total of measurement and control systems in thermal power stations (200 secondary stations), virtual stations (116), remote network communication building control valves (about 18,000), and total dispatch system points At around 300,000 points, the data collection frequency is 1 second.

Weihai Thermal Power Group's intelligent information heating dispatching system, which integrates geographic information, weather management, load forecasting, heating network monitoring, customer service, charging, remote heating meter reading, remote indoor temperature measurement system, production scheduling management and production plan management, energy A comprehensive service management information platform that integrates management and remote monitoring of user indoor temperature and other subsystems. Taking control as the center, taking into account the management function, on the basis of meeting the rigid index of thermal load demand, through scientific and technological means, energy saving and environmental protection are realized, and economic costs are saved.

2. Project features

Three, system architecture

The system adopts the CS architecture, collection and monitoring are independent of each other, and the modular structure design can operate normally when part of the system fails and other parts can reduce the affected range of the system and improve the safety of the system. According to the different communication conditions and the size of the data, multiple collectors are configured, and wired network communication is used to ensure complete data transmission. The system can be divided into two layers, namely the data collection and storage layer and the data analysis and display layer.

1. Data collection and storage layer

It mainly includes multiple KingIOServer collectors, 10 real-time database servers KingSCADA and 2 historical database servers KingHistorian. KingIOServer is used for real-time data collection and deployed on kingscada real-time data server; KingSCADA obtains real-time operating data of each thermal station, including process operating data and equipment operating parameters, and the data is set with alarm limits. At the same time, the other two kingSCADA real-time data servers obtain the operating data of the building control controller.

The historical database server deploys two sets of kinghistorian, two historical data servers are clustered, and the disk array is configured. The historical data server stores real-time data and historical data, real-time data is used for real-time analysis and display, historical data is used for statistical analysis, energy consumption analysis, etc., to realize online monitoring and scheduling of the system, and convert real-time data into valuable management information .

2. Data analysis display layer

The data analysis display layer mainly includes 1 engineer station, 8 operator stations, Web publishing server, and KM server.

SCADA server

Provide communication drive services, variable input/output services, variable calculation services, real-time alarm services, real-time trend services, real-time monitoring screen services, and operation authority control services at the device interface layer;

Engineer station

It is mainly used by management personnel to develop, edit, modify or update various parameters and constants of the system, and to configure, maintain, and manage various services provided by the SCADA server;

3. Operator station

As an operation terminal for MCC operators to realize centralized monitoring of energy equipment, remote operation, and parameter downloading;

4. Web publishing server

Realize the system Web publishing function, realize network browsing, and remotely monitor the on-site process operation anytime and anywhere;

Four, system function

1. Process monitoring screen

Process monitoring allows the staff to intuitively understand the operating conditions of each heat exchange station, browse the on-site process screens, understand the status of production and operation, and obtain key data: the real-time operating status of the equipment, such as a return water regulating valve The opening degree, PID parameter settings, current, frequency, etc.; primary and secondary network supply and return water conditions, such as temperature, flow, pressure, etc. The equipment in the screen can be clicked to pop up the operation panel, and operators with relevant permissions can modify and set the equipment operating parameters online to achieve the purpose of remote control.

2. Online parameter setting

It can realize the setting of the main equipment operating parameters and process operating parameters of the heating system, which can be combined with the programmable controller to realize the automatic operation of the equipment according to the set parameters, such as the start and stop control of the equipment, and the valve opening adjustment.

Because the parameters can be modified and set online, and the security of the system is fully considered, a higher authority level is set for key parameters, and only operators with higher authority can modify the settings.

3. Production data management

Production data management realizes real-time collection and display of heat source data, heat exchange station data, virtual station data, building control data, and household control data and historical data query.

The format of the real-time data report is as follows:

4. Heating network dynamic analysis module

Under the premise of the heating network's hydraulic debugging and balance, adjusting the heat source outlet to match the end user's load demand is an important means for the system to achieve energy saving and ensure the end user's thermal comfort, and it is also the key to the economic and safe operation of the heating network.

Based on real-time and historical statistical data and accurate prediction of heat load, according to the real-time data of heat exchange stations and heat users and the characteristics of pipe networks and heat users, dynamic hydraulic and thermal balance analysis and calculation of the entire network are carried out to determine the current heat source output conditions The best balance control scheme of the whole network, so as to realize the balanced adjustment of the system and the balanced operation of the heating network.

5. Load forecast

Prediction curve: input the average temperature of the day, calculate the heat demand of each main pipeline according to theory, and draw the curve. Actual curve: Plot points on the curve for the instantaneous heat of the actual heat source plant to achieve comparison with the predicted curve.

5. Meteorological data management

It provides two ways of manually inputting weather data and automatically obtaining it, and stores the weather data every day. Should include today's highest temperature, lowest temperature, wind direction, wind force, and average temperature.

6. Energy consumption analysis

The measurement statistics function separately counts and summarizes the input amount of the heat source system, the conversion amount of the conversion link, the transmission and distribution amount of the heating network transmission and distribution link, and the final use amount of the energy use link, supporting all levels of management personnel to accurately and clearly grasp the entire system The measurement information of each area.

Energy consumption index statistics: total heat consumption, total water consumption, heat consumption per unit area, water consumption per unit area;

Calculate the heat loss and water consumption per unit area of ​​the heat source, the heat exchange station, and compare the heat and water consumption of the five main pipelines, using the bar graph method; heat exchange station energy consumption analysis, for different pipeline heat exchange stations, energy consumption and The comparison of water consumption is realized by means of histogram;

7. Statistical reports

Including heat source plant, heat exchange station summary daily report, monthly report, annual report statistics; branch line heat source daily report, monthly report, annual report statistics.

8. Water pressure diagram

The theoretical water supply pressure and return water pressure, the actual water supply pressure and the return water pressure of the heat exchange station are displayed in the same curve in a curved manner, and the trend of the water pressure diagram is visually displayed. At the same time, the real-time water pressure graph data of the heat exchange station is displayed in the form of a report under the curve. The water pressure chart provides the basis for the dispatching execution and assists decision-making.

9. Equipment communication management

The tree diagram is expanded step by step, which is really the operating status and detailed information of the equipment in the system architecture, which realizes the communication diagnosis of the equipment and locates the fault point in the first time. Provide a strong basis for management decisions and improve efficiency.

10. Web publishing function

The system's network publishing is realized through the Web publishing server, and the process screen can be browsed through IE browser, and the process screen can be monitored anytime and anywhere. The Internet application of KingSCADA realizes the dynamic, real-time and interactivity of customer information services. In the Web screen, users can browse the data in KingSCADA, including real-time data, historical data, alarm data and event data. Users with operating authority can also perform related operations.

11. Alarm and early warning

Alarm and early warning can enable the operator to know the equipment failure/maintenance information and the information about the upcoming production accidents during the operation in the first time. Equipment failure/maintenance and maintenance alarm: When the equipment fails during operation, or when the equipment needs maintenance, the corresponding area will flash and be accompanied by an alarm voice prompt to remind maintenance personnel to arrive at the site in time to repair and maintain the equipment. Early warning of production accidents: Once the supply and return water flow, temperature, etc. reach the set warning value, an early warning dialog box will pop up to remind the operator to adjust the production status in time to prevent accidents.

Alarm and early warning are equipped with priority management, various types of alarm and early warning are accurately judged, automatic fault alarm, automatic accident early warning, and all alarm and early warning lists and detailed alarm and early warning information are displayed. Support a variety of alarm methods, such as voice alarm, SMS alarm light, to meet the user's audiovisual needs.

12. Event record

The system event record not only records the information of the event data, but also records all the data and conditions related to the event to the database for accident tracing and equipment operation analysis.

Major situations that occur in the system, such as equipment failure, over-limit alarm, start and stop of large-scale equipment, or operator's operation and parameter adjustment of equipment, can be recorded through the event recording function and the operation process for future analysis Basic information of the accident. The content of the event record includes various event information, the user when the event occurred, and the time when the event occurred.

13. System security management

Different user rights can be set according to the characteristics of the organizational structure, such as managers, engineers, and on-site personnel on duty. Each user can correspond to one role or multiple roles, and the change of the user's role directly affects its operating authority in the system. The system defines the accessible and operable content range for each role to ensure the security of system information, especially the core data security of production operation management.

Each user can log in to the system through a legal user name and password to access data and information in the business scope for which he is responsible. Once the logged-in user logs in, other personnel cannot log in remotely. The logged-in personnel can set the login timeout, and the system will automatically log out after the set time. The user login should display the last login time, location and other information.

14. Mobile phone/ipad client

In order to facilitate administrators, system use, and maintenance personnel to understand the operation of the heat network monitoring and dispatching center in real time, the system adopts B/S architecture. Any place that can access the Internet, as long as authorized managers, site leaders, and maintenance personnel can Browse the real-time data, historical data, curves, heat exchange station operation status, primary and secondary pipeline network operation status, etc. of the heating network dispatching and monitoring center through computer, mobile phone, iPad at any time.

Our system supports mobile phone access, enables mobile phone cross-platform browsing of data such as curves, reports and alarms, and supports mobile client display of Android and ios systems, so that leaders, maintenance personnel, inspection personnel, etc. can understand in real time the heating situation of their own responsible districts.

14. User temperature measurement system

The user's indoor temperature data is stored in the database of the meter reading system. The temperature value is obtained by connecting to the database and displayed on the corresponding building control valve interface. At the same time, the user's indoor temperature is displayed in a separate list.

Five, project summary

After the implementation of the intelligent information-based heating scheduling system, the annual saving of 85,000 tons of standard coal, the average heating unit consumption from 34.9 watts to 28.9 watts, the heat consumption per square meter from 0.438 GJ to 0.362 GJ, energy saving 17.4% ; Circulating water volume per square meter decreased from 5 liters/hour to 2.5-3.5 liters, saving 1.5-2 degrees per square meter; one heating period saves 252 MW of heat, reduces investment by 120 million yuan, and reduces sulfur dioxide in 1992 Tons, 581 tons of nitrogen oxides, and 1,660 tons of smoke and dust have achieved good economic, social and environmental benefits.

On January 9, 2015, Comrade Liang Chuanzhi, director of the existing building energy-saving renovation project of the Ministry of Housing and Urban-Rural Development, visited and investigated Weihai Thermal Power Group. Director Liang Chuanzhi and his party fully affirmed the work of Weihai Thermal Power Group. Thermal technology is in the forefront of the country, and it is worth learning from the thermal power industry.