| 摘要 |
The present invention is concerned with a limitation of the interaction between cascaded tap changers and/or between a tap changer and a shunt compensator independently of any real-time communication between the respective controllers. According to the invention, coordinated voltage control in distribution networks is enabled by an adaptive updating or tuning of control parameters DB 4 , TD 4 of a voltage control unit (41) controlling a second voltage control device (40), depending on instantaneous or actual operating conditions evaluated by the voltage control unit itself. Instead of using constant control parameters initially set by a commissioning engineer, the former are updated based on a voltage level U P 4 , which in turn is responsive to or affected by any control action performed by a first voltage control device neighbouring the second voltage control device. The voltage control unit calculates a deviation of an instantaneous value of said voltage level from a reference value, and translates or maps this deviation to an update of its dead bands and/or time delay characteristics. Hence, the voltage control unit inherently anticipates, or determines a likelihood of, a control action of the first voltage control device, without the need for a real-time transmission of this piece of information to the voltage control unit. |
