Power Transmission Systems
The supply of power means more than just the combination of individual components. Particularly in countries where demand for power is growing at an above-average rate, there are large-scale projects under way, e.g. transmission systems or industrial complexes. Setting up such large-scale projects calls for an expert partner, capable of diligently analysing demand and of planning the project integrally, taking all marginal conditions into account. This means a competent partner who produces top-quality components both for power transmission and for system management tasks. Such a partner must also ensure that the systems will be properly installed.
Experienced project management – the way to the successful project
With all key technologies in house, Siemens can provide turnkey solutions for individual demands in the field of power transmission and distribution.
The scope of supply includes all components from the generator terminals, via AC or DC transmission and the high-voltage grid to the HV, MV and LV distribution system going down to the individual customers. The benefits of turnkey projects are:
_ All project coordination is in one hand and
_ The interfaces between customer and supplier are minimized
_ The turnkey responsibility of Siemens reduces the project risk for the customer. In close cooperation with the customer, the task definition for the scheduled project is drawn up, and all marginal conditions clarified.
System optimization and engineering
One major task for the system engineering experts is the comparison and the assessment of various concepts. The basic parameters are transmission capacity and voltage, along with the transmission distance.
Having the turnkey responsibility, Siemens can optimize the transmission system technically and economically in order to find that transmission system which is tailored to our customer‘s demands.
High-Voltage Switchgear for Substations
High-voltage substations form an important link in the power transmission chain between generation source and consumer. Two basic designs are possible:
Air-insulated outdoor switchgear of open design (AIS)
AIS are favorably priced high-voltage substations for rated voltages up to 800 kV which are popular wherever space restrictions and environmental circumstances do not have to be considered. The individual electrical and mechanical components of an AIS installation are assembled on site.
Air-insulated outdoor substations of open design are not completely safe to touch and are directly exposed to the effects of weather and the environment.
Gas-insulated indoor or outdoor switchgear (GIS)
GIS compact dimensions and design make it possible to install substations up to 550 kV right in the middle of load centers of urban or industrial areas. Each circuitbreaker bay is factory assembled and includes the full complement of isolator switches, grounding switches (regular or make proof), instrument transformers, control and protection equipment, interlocking and monitoring facilities commonly used for this type of installation. The earthed metal enclosures of GIS assure not only insensitivity to contamination but also safety from electric shock .
Gas-insulated transmission lines (GIL) -A special application of gas insulated equipment are gas-insulated transmission lines (GIL). They are used where high-voltage overhead lines are not suitable for any reason. GIL has a high power transmission capability, even when laid underground, low resistive and capacitive losses and low electromagnetic fields.
No comments:
Post a Comment