LITS.jl

LITS.jl is a Julia package for doing Power Systems Dynamic Modeling with Low Inertia Energy Sources.

Installation

You can install it by typing

pkg> add LITS

Usage

Once installed, the LITS package can by used by typing:

using LITS

Structure

The following figure shows the interactions between LITS.jl, PowerSystems.jl, DifferentialEquations.jl and the integrators. The architecture of LITS.jl is such that the power system models are all self-contained and return the model function evaluations. The Jacobian is calculated through DifferentialEquations.jl's common-interface enabling the use of any solver available in Julia. Considering that the resulting models are differential-algebraic equations (DAE), the implementation focuses on the use of implicit solvers, in particular SUNDIALS since it has exceptional features applicable to large models — for instance, interfacing with distributed linear-solvers and GPU arrays. In addition, automatic differentiation is implemented using ForwardDiff.jl to obtain jacobians to perform small signal analysis.

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Contents

• Tutorial 0: Data creation
• Step 1: System description
• OMIB case: Data creation
• Dynamic Lines case: Data creation
• Tutorial: One Machine against Infinite Bus (OMIB)
• Step 1: Package Initialization
• Step 2: Load the system
• Step 3: Build the simulation and initializing the problem
• Step 4: Run the Simulation
• Step 5: Exploring the solution
• Optional: Small Signal Analysis
• Tutorial: Dynamic Lines
• Step 1: Package Initialization
• Step 2: Data creation
• Step 3: Create the fault and simulation on the Static Lines system
• Step 4: Run the simulation of the Static Lines System
• Step 5: Store the solution
• Step 3.1: Create the fault and simulation on the Dynamic Lines system
• Step 4.1: Run the simulation of the Dynamic Lines System
• Step 5.1: Store the solution
• Step 6.1: Compare the solutions:
• Network model
• Static Branches (or simply Branches)
• Dynamic Branches
• Reference Frames
• Synchronous Machines
• Inverters
• Transformation used
• Generator Models
• Machines
• Shafts
• Automatic Voltage Regulators (AVR)
• Power System Stabilizers (PSS)
• Prime Movers and Turbine Governors (TG)
• Reference
• Inverter Models
• DC Source
• Frequency Estimators
• Outer Loop Controls
• Inner Loop Controls
• Converter
• Filters
• Reference
• Small Signal Analysis
• Automatic Differentiation