## File(s) under permanent embargo

# Worst case voltage variation on microgrid

Integration of different types of distributed energy resources (DERs) in

distribution network has significant effects on voltage profile for both customers

and distribution network service providers (DNSPs). This impact may manifest itself

positively or negatively, depending on the voltage variation and the amount of

DERs that can be connected to the distribution networks. This chapter presents a

way to estimate the voltage variation and the amount of the DERs in a microgrid.

To do this, a voltage rise formula is derived with some approximation and the

validation of this formula is checked by comparing with the existing power

|systems simulation software. Using the voltage variation formula, the worst case

scenario of microgrid is used to estimate the amount of voltage variation and

maximum permissible DERs. The relationship between voltage level, voltage rise,

and connection cost of DERs in a microgrid is also described in this chapter.

Finally, based on the worst case scenario of microgrid; some recommendations are

given to counteract the voltage rise effect.

distribution network has significant effects on voltage profile for both customers

and distribution network service providers (DNSPs). This impact may manifest itself

positively or negatively, depending on the voltage variation and the amount of

DERs that can be connected to the distribution networks. This chapter presents a

way to estimate the voltage variation and the amount of the DERs in a microgrid.

To do this, a voltage rise formula is derived with some approximation and the

validation of this formula is checked by comparing with the existing power

|systems simulation software. Using the voltage variation formula, the worst case

scenario of microgrid is used to estimate the amount of voltage variation and

maximum permissible DERs. The relationship between voltage level, voltage rise,

and connection cost of DERs in a microgrid is also described in this chapter.

Finally, based on the worst case scenario of microgrid; some recommendations are

given to counteract the voltage rise effect.