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Positive Sequence Load

On this page:

This library includes three types of loads:

  • Constant impedance loads.

  • Constant power loads.

  • Constant current loads.

Constant Impedance Load

Parameters

Symbol

Description

Unit

Symbol

Description

Unit

ID

Load name

a unique name

Status

Connect/Disconnect status

Initial value 1 (0 for disconnected)

Bus

Bus name

a unique name*

P (MW)

Active power in 1 p.u. voltage

MW

Q (MVAr)

Reactive power in 1 p.u. voltage**

MVAr

Constant Current Load

Parameters

Symbol

Description

Unit

Symbol

Description

Unit

ID

Load name

a unique name

Status

Connect/Disconnect status

Initial value 1 (0 for disconnected)

Bus

Bus name

a unique name*

P (MW)

Active power

MW

Q (MVAr)

Reactive power**

MVAr

Constant Power Load

Parameters

Symbol

Description

Unit

Symbol

Description

Unit

ID

Load name

a unique name

Status

Connect/Disconnect status

Initial value 1 (0 for disconnected)

Bus

Bus name

a unique name*

P (MW)

Active power

MW

Q (MVAr)

Reactive power**

MVAr

Notes:

(*) The bus name is the bus that the load is connected to. 
(**) Q value is a positive quantity for inductive loads while it is negative for capacitive loads.

Available I/O Pins

No

Pin Description

Pin Type

Value/Unit

Instruction

No

Pin Description

Pin Type

Value/Unit

Instruction

1

Set/Get service status

I/O

1: In-service

0: Out-of-service

loadID/status

2

Set active and reactive power

I

MW

MVAr

loadID/P

loadID/Q

3

Get current magnitude

O

p.u. (network base)

loadID/Imag

4

Get current angle

O

Degree

loadID/Iang

Example

See the Load page in phasor01_IEEE39.xlsx file in demo phasor01.

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