Intelligent systems.
Author: L.N. Makeev, Leading Specialist of the Automation and Dispatching Department of JSC NPO SEM
The Automation and Dispatching Department of JSC NPO SEM (DAD) has completed another major project to create an automated control and management system for engineering equipment in the Pokrovskoe-Glebovo residential complex in Moscow.
The property is an elite microdistrict consisting of 9 residential five-story buildings with underground parking and 29 cottages. According to the stages of development and territorial placement, construction was carried out in two stages: first, buildings were erected in zone «C» (4 five-story buildings and 12 cottages), and then in zone «B» (5 five-story buildings and 17 cottages).
The main task set by the customer to the specialists of the DAD was to create the most reliable control and monitoring system, allowing the most efficient operation of the complex of buildings. It was necessary to provide the dispatcher with information on the operation of all engineering systems installed in each building and cottage (supply and exhaust ventilation, central air conditioning system, small individual heating point, power supply and electric lighting system, etc.), as well as to organize an automated accounting system for energy resources of the entire complex, necessary for mutual settlements with residents.
Taking into account some complexity of the solution of the task, related to a significant amount of engineering equipment subject to control and management of all its parameters, its large territorial dispersion, the specialists of the DAD made a decision at the design stage to implement automation of engineering systems on the equipment of one manufacturer and to use a software package for the upper and lower levels of the system of the same manufacturer.
To ensure, if necessary, integration with other engineering systems, the open LonWorks information exchange protocol was adopted.
This solution allowed to avoid possible inconsistencies between equipment of different manufacturers, to minimize the time required for system setup, and to obtain the most reliable and functionally complete automation and dispatching system. Having analyzed all possible technical solutions offered by manufacturers, DAD specialists settled on the equipment and software of TAC (Sweden), as the most suitable.
However, the use of this equipment to create a system for monitoring and accounting of energy resources turned out to be expensive and ineffective. As a result, the software and hardware complex «ECOM» was chosen as the most responsive to the goals and scope of the task.
The first successful completion was the launch of the described system in the first stage of development of zone «C». The result was a complete, reliably functioning system, which left no reason for the customer's technical services to doubt the correctness of the solutions chosen by DAD specialists.
When designing the system in zone «B», it was decided to install one more server of the automation and dispatching system of engineering systems in one of the buildings located in this zone of territorial development of the complex. This was caused by the need to implement a high-speed data transmission segment between two zones «B» and «C» located at a large distance from each other. All cable lines of the LonWorks network of buildings in zone «B», similarly to zone «C», are assembled in a room with an installed intermediate server, on routers that perform the transition from the LonWorks segment with the FTT-10 network topology (78 kBit/s) to the TP-1250 segment (1250 kBit/s). The high-speed segment serves as a medium for transmitting data to the server in zone «B». Communication between the buildings (servers) of zone «B» and «C» is carried out via an Ethernet 100 Mbit network. The Zone B computer can also be used by the maintenance services as a workstation, allowing them to monitor and control the operation of the Zone B engineering systems in their immediate vicinity.
For the energy resource monitoring and accounting system, an intermediate server was not installed, since there was no need to transfer data at high speeds, and one workstation in zone «C», allowing settlements with consumers, was completely sufficient.
As a result, the created automated system currently provides the dispatcher with information from 1,700 water, heat and electricity meters, as well as management and control over the entire set of engineering equipment of the residential complex, namely:
— 96 air handling units and air conditioners;
— 547 exhaust units;
— 28 heating points;
— 6 refrigeration machines;
— 5 pumping stations;
— 89 outdoor and indoor lighting groups;
— 1 gas boiler house, etc.
It is difficult to imagine how and with what forces the operation service would cope with such a number of engineering systems, remote from each other, without the use of this system. from a friend over long distances.
OAO NPO SEM
Russia, 109316, Moscow,
Ostapivsky proezd, 22