Voltage Level

The com.powsybl.iidm.network.VoltageLevel is used to model a voltage level. A voltage level is is a collection of equipments located in the same substation and at the same base voltage. It can contain batteries, generators, loads, shunt compensators, dangling lines, static VAR compensators and HVDC converter stations.

A voltage level is located in a substation.

# Characteristics

Attribute Type Unit Required Default value Description
id String - yes - The ID of the voltage level
name String - no - The name of the voltage level
NominalV double kV yes - The nominal voltage
LowVoltageLimit double kV no - The low voltage limit
HighVoltageLimit double kV no - The high voltage limit
TopologyKind TopologyKind - yes - The kind of topology

## TopologyKind

TopologyKind describes the topology model of the voltage level i.e. how equipments are connected together. The com.powsybl.iidm.network.TopologyKind enum contains these two values:

• NODE_BREAKER
• BUS_BREAKER

NODE_BREAKER corresponds to a node/breaker model, which is the most detailed way to describe a topology. All elements are physical ones: busbar sections, breakers and disconnectors. A node in a node/breaker context means “connection node” and not topological node or bus.

BUS_BREAKER corresponds to a bus/breaker model, which is an aggregated form of the topology made of buses and breakers. A bus is the aggregation of busbar sections and closed switches.

# Example

This example shows how to create a new VoltageLevel object:

VoltageLevel voltageLevel = substation.newVoltageLevel()
.setId("VL")
.setName("VL") // optional
.setNominalV(20)
.setTopologyKind(TopologyKind.NODE_BREAKER)
.setLowVoltageLimit(15)
.setHighVoltageLimit(25)