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FEEDER POWER CONTROL OF A WIND POWER PLANT

IP.com Disclosure Number: IPCOM000234888D
Publication Date: 2014-Feb-12
Document File: 7 page(s) / 171K

Publishing Venue

The IP.com Prior Art Database

Abstract

This document is a description for a Power Plant Controller (PPC) based power control for line feeders, for a wind power plant (WPP) connected to an electrical grid and the wind power plant comprises a plurality of wind turbine generators (WTGs), the wind turbine generators produce electrical power. The idea on the invention is to enable the PPC to be set up to limit active power, reactive power or current generated by the WTGs generating through a feeder breaker, and thereby be able to reconfigure the internal electrical network within the wind power plant.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 33% of the total text.

Page 01 of 7

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FEEDER POWER CONTROL OF A WIND POWER PLANT


1. Introduction

This is a description for a Power Plant Controller (PPC) based power control for line feeders, for a wind power plant (WPP) connected to an electrical grid and the wind power plant comprises a plurality of wind turbine generators (WTGs), the wind turbine generators produce electrical power.

The idea on the invention is to enable the PPC to be set up to limit active power, reactive power or current generated by the WTGs generating through a feeder breaker, and thereby be able to reconfigure the internal electrical network within the wind power plant.

A WPP can be designed as shown in the following single line diagram in Figure 1. The breakers between feeders allow the operator to open one of the feeder breakers and close its inter-feeder breaker to let the power production of the turbines on the feeder to be directed through another feeder breaker. But since the number of the WTGs on this feeder breaker is now increased, then the current through the breaker must be limited.

This is among others, done by limiting WTGs production when needed.


Page 02 of 7

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Figure 1

The PPC according to the invention will be able to be setup to limit production through any of the main breakers or the feeder breakers.

The basic requirements for an implementation of this function are listed in the following table, other implementations may reach the same result with less inputs, but are considered to be included in this disclosure:

Requirement

index

Requirement

1

Limit the total feeder current to a desired value

2

Be able to choose priority between P and Q when

limiting current

3

Limit the total feeder active power to a desired value

4

Limit the total feeder reactive power to a desired value

5

Limit the total feeder active and reactive power to a

desired value


Page 03 of 7

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The design is using the following setup in the PPC.


 Each feeder breaker must be specified in the PPC.


 Each breaker must have a group of turbines associated to it. The group of turbines must include all the WTGs that are producing power through the breaker. If a breaker configuration changes so that it changes the group of the turbines feeding through the breaker, then a new list of turbines must be associated to the specific breaker.


 Each WTG must only be associated to one feeder breaker.


 The PPC must be able to monitor the position of the breakers (open or closed). This is only needed if WTG associations to feeders need to change automatically by monitoring the breaker status.


 For each breaker a maximum current value must be specified. This can be a fix parameter.


 The user should be able to specify a maximum active power value for each breaker. This can be a PPC parameter or a dynamic value from external grid operator.


 The user should be able to specify a maximum reactive power value for each breaker. This can be a PPC parameter or a dynamic value from external grid operator.


 The user sho...