Use of load control to regulate voltage on distribution networks with embedded generation

Since 1994, Econnect has, in conjunction with Northern Electric PLC, investigated the use of consumer load control as a new and innovative method to actively regulate distribution system voltage when affected by the operation of embedded generators. There are a number of issues that can limit the installed capacity of embedded generators; these are often voltage related and the most common is steady-state voltage rise. A number of techniques can be applied to limit steady-state voltage rise, some of which are static in time (e.g., network re-inforcement) and some dynamic (e.g., power factor control). This paper discusses the issue of excess steady-state voltage rise and the methods of limitation that can be applied with specific reference to wind generation. The new and innovative approach using consumer load control is discussed and compared with the existing methods using a simulation case study.