Method for acquiring indexes of control capacity of regional dispatching side in real time in provincial-regional coordinated voltage control

Abstract

The invention relates to a method for detecting the control capacity of a regional dispatching side in the provincial-regional coordinated voltage control, and belongs to the technical field of power system automatic voltage control. In the method, indexes QNI, QND, QNIst and QNDst for describing reactive control capacity of the regional dispatching side are designed, wherein the QNI refers to reactive capacity capable of being increased by the current regional dispatching radiation power grid; the QND refers to reactive capacity capable of being decreased by the current regional dispatching radiation power grid; the QNIst refers to reactive capacity capable of being increased in a transformer substation where the current regional dispatching gate is positioned; and the QNDst refers to reactive capacity capable of being decreased in a transformer substation where the current regional dispatching gate is positioned. On the basis that whether the weighting coefficient of reactive power equipment i1 is 0, online calculation of the indexes of the reactive voltage control capacity of the regional dispatching side is realized. The method can timely provide basis for calculating a provincial-regional coordinated voltage control strategy so as to ensure normal operation of the provincial-regional coordinated voltage control.

Description

technical field [0001] The invention belongs to the technical field of automatic voltage control of electric power systems, and in particular relates to a method for considering the control capability of the land regulation side in the voltage control of provincial coordination. Background technique [0002] Automatic Voltage Control (AVC, Automatic Voltage Control) system is one of the most important automatic control systems in power systems. my country's interconnected power grid has a large scale, and its operation is managed by a multi-level dispatching organization that is hierarchical and partitioned. Network dispatching, provincial dispatching, and local dispatching are the three representative dispatching levels. The voltage control of the provincial power grid and the regional power grid needs to be coordinated with each other to achieve coordinated reactive power and voltage optimization control, and achieve the purpose of reasonable reactive power exchange betwee...

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Problems solved by technology

In terms of provincial-level coordinated voltage control, Zou Genhua, Guo Yujin, Yao Zhuxiang, etc. in "Research on Provincial-level Coordinated Automatic Voltage Control (AVC) of Large Power Grids" (Huazhong Electric Power, 2008, Vol. 21, No. 3, pp. 9-11 ) and "Research on the Realization Method of Provincial-Local Coordination Automatic Voltage Control (AVC)" (China Electric Power, 2008, Vol. However, this method is only based on the current switching status of the equipment when calculating the reactive power up-regulation capability and reactive power down-regulation capability of the ground regulation, without considering the action of the reactive power equipment on the ground regulation side. Constraints, including whether the action of reactive power equipment will cause the bus voltage to exceed the limit, the limit of daily action times of reactive power equipment, and the time interval limit of reactive power equipment action. The reactive power adjustment capability calculated without considering these constraints is inaccurate It brings unnecessary risks to the actual operation of voltage control. For example, when the number of actions of a certain capacitor has reached the upper limit, it is unreasonable to switch the capacitor

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