A reactive power control device for use with a power device, the power device being for consuming power from, or providing power to, an electricity distribution network when connected thereto, the reactive power control device comprising: detecting means for detecting, at the power device, a reactive power characteristic of electrical power flowing in the electricity distribution network, said reactive power characteristic relating to a reactive power component of electricity flowing in said electricity distribution network; and being characterised by: determining means arranged to determine, based on said detected power characteristic, whether said reactive power component is more inductive than a first predefined value or whether it is more capacitive than a second predefined value; and control means arranged to control, on the basis of said detected reactive power characteristic, a reactive power contribution to the electricity distribution network by the power device, so as to adjust a value of said detected reactive power characteristic, wherein the control means is arranged to: control said power device to contribute capacitive reactive power to the electricity distribution network in response to a determination that the detected reactive power component is more inductive than the first predefined value; and control said power device to contribute inductive reactive power to the electricity distribution network in response to a determination that the detected reactive power component is more capacitive than the second predefined value. detecting means for detecting, at the power device, a reactive power characteristic of electrical power flowing in the electricity distribution network, said reactive power characteristic relating to a reactive power component of electricity flowing in said electricity distribution network; and being characterised by: determining means arranged to determine, based on said detected power characteristic, whether said reactive power component is more inductive than a first predefined value or whether it is more capacitive than a second predefined value; and control means arranged to control, on the basis of said detected reactive power characteristic, a reactive power contribution to the electricity distribution network by the power device, so as to adjust a value of said detected reactive power characteristic, wherein the control means is arranged to: control said power device to contribute capacitive reactive power to the electricity distribution network in response to a determination that the detected reactive power component is more inductive than the first predefined value; and control said power device to contribute inductive reactive power to the electricity distribution network in response to a determination that the detected reactive power component is more capacitive than the second predefined value. determining means arranged to determine, based on said detected power characteristic, whether said reactive power component is more inductive than a first predefined value or whether it is more capacitive than a second predefined value; and control means arranged to control, on the basis of said detected reactive power characteristic, a reactive power contribution to the electricity distribution network by the power device, so as to adjust a value of said detected reactive power characteristic, wherein the control means is arranged to: control said power device to contribute capacitive reactive power to the electricity distribution network in response to a determination that the detected reactive power component is more inductive than the first predefined value; and control said power device to contribute inductive reactive power to the electricity distribution network in response to a determination that the detected reactive power component is more capacitive than the second predefined value. control said power device to contribute capacitive reactive power to the electricity distribution network in response to a determination that the detected reactive power component is more inductive than the first predefined value; and control said power device to contribute inductive reactive power to the electricity distribution network in response to a determination that the detected reactive power component is more capacitive than the second predefined value.