Online cooperative control method for multiple reactive power compensation devices in regional power grid

Abstract

The invention discloses an online cooperative control method for multiple reactive power compensation devices in a regional power grid. The method comprises the steps of employing a main and auxiliarycontrol mode when the reactive power compensation devices of different manufacturers or different types exist in the regional power grid; and when all reactive power compensation devices in the regional power grid are of a same model of a same manufacturer, adopting an autonomous control mode. Aiming at the cooperative operation of the plurality of reactive power compensation devices in the regional power grid, the situation of devices of the same model of the same manufacturer is considered, meanwhile, the situation of devices of different models of different manufacturers is also considered, different control strategies are respectively adopted, and the engineering practical situation is better met. According to the method, when the reactive target value which should be sent by each device is calculated, the voltage-reactive slope characteristic of the device is considered, but also the rated capacity proportion of each device is also considered, so that a more balanced reactive margin is reserved for each device. Meanwhile, the line loss optimization of the regional power grid is also considered, and the line loss is reduced while the reactive power is compensated.

Description

technical field [0001] The invention belongs to the technical field of power quality, and in particular relates to an online coordinated control method for multiple reactive power compensation devices in a regional power grid. Background technique [0002] Reactive power compensation is a technology that plays a role in improving the power factor of the power grid in the power supply system, reducing the loss of power supply transformers and transmission lines, improving power supply efficiency, and improving the power supply environment. Therefore, the reactive power compensation device is in an indispensable and very important position in the power supply system. Reasonable control of the reactive power compensation device can minimize the loss of the grid, stabilize the grid voltage, and improve the power quality. On the contrary, if it is selected or used improperly, it may cause many adverse effects such as system voltage fluctuation and harmonic increase. [0003] At...

AI Technical Summary

Problems solved by technology

At present, different devices operate independently and cannot be coordinated and controlled. They each operate according to the automatic control strategy built into the device. From a global perspective, they cannot play a good role in improving the voltage deviation of the regional power grid.

It often happens that due to the difference in network communication delay and the adjustment performance of each device, the adjustment direction of one device is to raise the voltage and generate capacitive reactive power, while the adjustment direction of the other device is to reduce the voltage and generate inductive reactive power, which increases the The unnecessary number of actions of each device forms a vicious circle, which not only affects the life of the device, but also causes repeated fluctuations in the grid voltage. It is urgent to design a cooperative operation method among multiple reactive power compensation devices to improve the efficiency of reactive power compensation. Efficiency and stability, improve grid power quality, reduce grid loss

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