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Automatic voltage reactive power control method and device

An automatic voltage and power control technology, applied in the direction of AC network voltage adjustment, hydropower, engine components, etc., can solve the problem of not considering reactive power coordination, etc., to achieve the effect of improving the stable operation level

Pending Publication Date: 2022-05-13
NORTH CHINA ELECTRICAL POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology studies the joint active power ride-through scheme of the pumped storage unit and the fan when the soft direct fault occurs, and does not consider the coordination between reactive power

Method used

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  • Automatic voltage reactive power control method and device
  • Automatic voltage reactive power control method and device
  • Automatic voltage reactive power control method and device

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Embodiment Construction

[0042] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature of each embodiment in the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0043] In addition, the steps shown in the flow diagrams of the figures may be performed in a computer system, such as a set of computer-executable instructions, and, although a logical order is shown in the flow diagrams, in some cases, the sequence may be different. The steps shown or described are performed in the order herein.

[0044] Please refer to figure 1 As shown, the automatic voltage and reactiv...

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PUM

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Abstract

The invention discloses an automatic voltage reactive power control method and device, and the method comprises the steps: obtaining the voltage of a flexible DC / AC side bus, and judging the out-of-limit condition of the voltage of the flexible DC / AC side bus according to a target value and an actual value of the AC side bus of a flexible DC power grid; analyzing the out-of-limit condition of the terminal voltage of the conventional pumped storage unit according to the actual value, the constraint threshold value and the control dead zone of the terminal voltage of the conventional pumped storage unit; when the terminal voltage of the conventional pumped storage unit does not exceed the limit, the conventional pumped storage unit completes adjustment of the terminal voltage instruction and automatic voltage reactive power control; when the terminal voltage of the conventional pumped storage unit exceeds the limit, analyzing the out-of-limit condition of the terminal voltage and reactive power of the variable-speed pumped storage unit according to the actual value of the terminal voltage of the variable-speed pumped storage unit and the constraint threshold value; and when the terminal voltage and the reactive power of the variable-speed pumped storage unit do not exceed the limit, the terminal voltage or the reactive power of the variable-speed pumped storage unit is adjusted through a constant-voltage control mode or a constant-reactive-power control mode according to the control strategy of the variable-speed pumped storage unit to complete automatic voltage reactive-power control.

Description

technical field [0001] The invention relates to the field of electric power control management, in particular to an automatic voltage and reactive power control method and device. Background technique [0002] Flexible direct current transmission technology has become an important means to solve large-scale new energy "delivery and access", and the pumped storage technology with the most mature technology and the lowest cost plays an important role in smoothing the impact of large-scale new energy grid connection. , The joint operation of "flexible straight + pumped storage" has become an important scenario to solve the problem of new energy grid-connected consumption. In view of the fact that MMC can quickly and independently adjust the reactive power output, the MMC flexible DC converter station has become a potential plant-level automatic voltage control (AVC) resource in the power system; at the same time, with the advancement of power electronics technology, pumped stor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16H02J3/36H02J3/28F03B13/06
CPCH02J3/16H02J3/36H02J3/28F03B13/06Y02E10/20Y02E60/16
Inventor 王炳辉李长宇李善颖吴涛黄天啸谢欢李雨刘苗李烜辛光明王晓斐任翔卢文清张璐赵天骐
Owner NORTH CHINA ELECTRICAL POWER RES INST
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