Power system simulation and analysis is the core of CASSI’s business. The transition from conventional resources to renewable resources requires a large effort to identify and solve the technical problems this transition brings about. CASSI can perform generator interconnection system reliability impact and other studies which involve<br /> power flow, contingency, short circuit, dynamic stability, transfer, and electromagnetic transients analyses. CASSI has experience in setting up and performing simulations<br /> on several software platforms including PTI PSS®E, PSCADTM/EMTDCTM, DIgSILENT PowerFactory, Aspen, PowerGEM TARA, DSAToolsTM, and RTDS RSCAD.

ower system analysis involves dealing with large volumes of data and repeating different processes, e.g. solving power flows, many times during a study. Automation is crucial in order to minimize human errors, and to make the process repeatable. Exactly for this reason, nearly all commercial simulation software tools provide scripting options<br /> to allow interacting with software programatically. Python is the most popular scripting language among power system analysis tools followed by Visual Basic, Javascript, and in some cases proprietary scripting languages (e.g. DPL in PowerFactory). CASSI Engineering has experience in developing scripts for automation especially in Python.

Both generic and user-defined models are useful concepts in the simulation of power systems. While generic models are easier to use and more readily available, more accurate models that better represent a manufacturer’s equipment are preferred for example in studies where the power network is weak and electrical proximity of equipment<br /> is expected to increase the chance of interaction between their controllers. CASSI has experience in developing dynamic models in the following platforms:<br /> 1. PSCADTM/EMTDCTM<br /> 2. RTDS RSCAD<br /> 3. Siemens PTI PSS®E<br /> 4. DSAToolsTM<br /> 5. DIgSILENT PowerFactory

Leveraging extensive experience of our engineers in HVDC and FACTS, we offer expertise support in planning and conceptual designing of schemes such as HVDC terminals<br /> (VSC, LCC), Static VAR Compensator, and STATCOM with a main focus on the following services:<br /> 1. HVDC & FACTS planning and feasibility studies<br /> 2. Specification Development<br /> 3. Model Development and Simulation<br /> 4. Fault / Event Analysis<br /> 5. Power Quality / Harmonic Assessmen