# ACShort#

Common Parameters: u, name, bus1, bus2

Common Variables: v1, v2, a1, a2

Available models: Jumper

## Jumper#

Jumper is a device to short two buses (merging two buses into one).

Jumper can connect two buses satisfying one of the following conditions:

• neither bus is voltage-controlled

• either bus is voltage-controlled

• both buses are voltage-controlled, and the voltages are the same.

If the buses are controlled in different voltages, power flow will not solve (as the power flow through the jumper will be infinite).

In the solutions, the p and q are flowing out of bus1 and flowing into bus2.

Setting a Jumper's connectivity status u to zero will disconnect the two buses. In the case of a system split, one will need to call System.connectivity() immediately following the split to detect islands.

### Parameters#

Name

Symbol

Description

Default

Unit

Properties

idx

unique device idx

u

$$u$$

connection status

1

bool

name

device name

bus1

idx of from bus

bus2

idx of to bus

### Variables#

Name

Symbol

Type

Description

Unit

Properties

p

$$P$$

Algeb

active power (1 to 2)

q

$$Q$$

Algeb

active power (1 to 2)

a1

$$a_{1}$$

ExtAlgeb

phase angle of the from bus

a2

$$a_{2}$$

ExtAlgeb

phase angle of the to bus

v1

$$v_{1}$$

ExtAlgeb

voltage magnitude of the from bus

v2

$$v_{2}$$

ExtAlgeb

voltage magnitude of the to bus

### Initialization Equations#

Name

Symbol

Type

Initial Value

p

$$P$$

Algeb

q

$$Q$$

Algeb

a1

$$a_{1}$$

ExtAlgeb

a2

$$a_{2}$$

ExtAlgeb

v1

$$v_{1}$$

ExtAlgeb

v2

$$v_{2}$$

ExtAlgeb

### Algebraic Equations#

Name

Symbol

Type

RHS of Equation "0 = g(x, y)"

p

$$P$$

Algeb

$$P \left(1 - u\right) + u \left(a_{1} - a_{2}\right)$$

q

$$Q$$

Algeb

$$P \left(1 - u\right) + u \left(v_{1} - v_{2}\right)$$

a1

$$a_{1}$$

ExtAlgeb

$$P$$

a2

$$a_{2}$$

ExtAlgeb

$$- P$$

v1

$$v_{1}$$

ExtAlgeb

$$Q$$

v2

$$v_{2}$$

ExtAlgeb

$$- Q$$

Config Fields in [Jumper]

Option

Symbol

Value

Info

Accepted values

1

allow adjusting upper or lower limits

(0, 1)

0