Monitoring and control system (ARMAC)

The “Automatic Reservoir Monitoring And Control System”, called ARMAC for short, was developed by Montanhydraulik India. It is a computerised control system for the monitoring and control of dam gates and reservoirs and is the result of our collective experience in the development and production of hydraulic drive systems for hydromechanical applications.

Taking the geographic and climatic conditions into account, both historical and in real time, ARMAC is used to calculate the optimum water level for a reservoir, not only for power generation, but also for the irrigation of the surrounding area. ARMAC then commands the various gates to open or close in order to achieve the required flows and maintain the levels.

Furthermore, several dams along the same river system can be perfectly coordinated by using ARMAC. The necessary software has been continuously developed by our engineers over the years.

ARMAC – an overview

  • exact monitoring and adjustment of the water flows and specified water levels
  • visual readout of the position of each individual gate at all times
  • possibility of simulation and automatic control of individual gate movement and manual control of the other gates – even when some gates are switched to manual control and others connected to ARMAC control
  • open communication protocols like Modbus/Profibus/Ethernet along with OFC’s used in redundant ring networks
  • signals (visual and audible) to indicate malfunctions in the hydraulic system
  • generation and visualisation of extensive data records regarding water flow quantities,
  • water levels, gate positions, component malfunction etc.
  • flexible programming by PC-based system which can also be modified online
  • transmission of data in real time via OFC, VSAT or GPRS based on local needs

ARMAC in detail

The ARMAC system measures the water level of a dam every 15 minutes. This is achieved by means of water level sensors installed in upstream and downstream positions.

Essential preconditions for successful system design and use are the extensive data pools, which not only take water level measurements from decades of records into consideration, but also the geographical contours of each reservoir (area volume curves). The water levels established via radar-type sensors are compared with the collected data and the current local requirements.

This way the optimum opening of the spillway gates to be controlled is calculated and the inlet and outflow through the gates is controlled while monitoring inflows at the same time. The system allows online access to all programs and data at any time. The established data can be transmitted in real time via OFC/PLCC, VSAT or GPRS.