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This library includes three types of loads:

  • Constant impedance loads
  • Constant power loads
  • Constant current loads

Constant Impedance Load

Symbol

Description

Unit

ID

Load name

a unique name

StatusConnect/Disconnect statusInitial 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

Symbol

Description

Unit

ID

Load name

a unique name

StatusConnect/Disconnect statusInitial value 1 (0 for disconnected)

Bus

Bus name

a unique name*

P (MW)

Active power

MW

Q (MVAr)

Reactive power**

MVAr

Constant Power Load

Symbol

Description

Unit

ID

Load name

a unique name

StatusConnect/Disconnect statusInitial value 1 (0 for disconnected)

Bus

Bus name

a unique name*

P (MW)

Active power

MW

Q (MVAr)

Reactive power**

MVAr



Note:  

(*) 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

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 PHASOR-01.

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