A satirical look at remote monitoring ...

Remote Monitoring of Transformer Stations

The remote monitoring system allows you to monitor and control:

  • the 110-kV feeder
  • the transformer
  • the switchgear settings
  • all auxiliary systems

The option of having malfunction notifications from WT EnergySystems forwarded to your mobile phone will give you the certainty of being up to date: We ensure you have a good night's rest!

WT EnergySystems offers you reliability and security. In our substations (SS), all fundamental processes and working states are monitored and controlled by remote monitoring. Our transformer stations are all built with technology designed to provide the greatest possible benefit to customers.

The old, well-known proverb “Time is Money” applies to wind park operators rather literally. Every minute of energy fed into the grid yields returns. Therefore, output monitoring via remote monitoring is the basic module for the remote monitoring of substations.

Transformer Monitoring

The transformer is the central component of every transformer station. Thus, it is given special attention in remote monitoring. As an example, temperature, gas formation, oil circulation, oil pressure and oil level are monitored constantly.

Errors trigger an immediate warning message to the control system. According to the emergency action plan, the messages are sent as text message, fax or call to the responsible persons.

In a critical event, the transformer is switched off automatically.

The automatic control of the feed-in to the 110-kV-line is carried out by the tap changer at the transformer. Its setting is shown in the remote monitoring system. In case of a malfunction, a warning message is sent out to the control system. The feed-in and the faultless operation of the transformer are given top priority.

An important function is performed by the oil sump under the transformer. In case of a breakdown, oil flowing out of the transformer will be retained by the oil sump and cannot pollute the environment. The level of oil in the sump is monitored permanently.

Substation Monitoring

The settings of the switchgears in the substation are shown as a circuit diagram on the graphical interface. With the required access authorization, the earthing disconnector, the feeder disconnector and the circuit breaker can also be operated via remote control.

In case of work being carried out directly on site, the substation may have to be shut down momentarily and then put into operation again.

With the help of the remote control and surveillance system, the duration of the downtimes can be kept to an absolute minimum.

The occurrence of a possible protection tripping - due to earth leakage, overcurrent or short circuit at the switchgears – also leads to a warning message to the control system and triggers the emergency action sequence.

Auxiliary Equipment Monitoring

The auxiliary equipment of the substation has to meet certain rather very strict safety standards. Additional equipment may be as follows:

  • Gate (open /closed)
  • Door of the control room building (open /closed)
  • Battery system for the operation of the switchgears (monitoring)
  • Protective systems of the LV distribution (monitoring)
  • Temperature in the control room building (monitoring)
  • Air-conditioning systems (monitoring)
  • Smoke detectors in the control room building (monitoring)

Worldwide Monitoring

Owing to identical user interfaces in the remote surveillance and the control system, the supervision of the substation via laptop and Internet access is possible - irrespective of the location, worldwide.

Upon receipt of a text message notification on the mobile phone, a precise analysis of the substation's operating states can be conducted via laptop. This includes all above-mentioned information.

When maintenance work is carried out on the systems, the substation can be accessed for shut-down immediately before and restart immediately after maintenance with the help of the remote control and monitoring system. This way, we achieve a higher cost-efficiency in any case.

In the event of load shedding by the energy supply company due to excess output, the remote control and monitoring system sends a notification to the operator, who can then switch the substation back on via the system in the further course.

Monitoring All Year Round

Records of all malfunctions and operational incidents are logged by the control system and listed for internal analysis and evaluation. This information is retrievable via the remote monitoring system as well.

On principle, all operational measurements and meter data are archived with date and time indication and are available for subsequent statistical evaluation and analysis.

The daily, monthly and annual meter records are preset in the basic configuration. Other statistical evaluations and analyses are developed and installed according to customer needs. If requested, data can be analysed using Microsoft Excel or another format.

After the commissioning of a substation, WT EnergySystems offers an extensive maintenance package to ensure long, fault-free operation.