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Reactive voltage optimization control method and system for 10kV power supply area

A control method and voltage optimization technology, which can be used in reactive power compensation, reactive power adjustment/elimination/compensation, photovoltaic power generation, etc.

Active Publication Date: 2021-05-25
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0005] The purpose of the present invention is to provide a reactive voltage optimization control method and system in a 10kV power supply area, so as to solve the problem that the existing technology cannot realize continuous fine regulation and control of voltage

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  • Reactive voltage optimization control method and system for 10kV power supply area
  • Reactive voltage optimization control method and system for 10kV power supply area
  • Reactive voltage optimization control method and system for 10kV power supply area

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Embodiment Construction

[0046] Such as figure 1 As shown, the present application provides a reactive voltage optimization control method in a 10kV power supply area, which specifically includes the following steps:

[0047] Step 1. Obtain the grid data of all nodes in the power supply station area, and calculate the three-phase unbalance degree according to the grid data;

[0048] Specifically, in this embodiment, the steps of calculating the three-phase unbalance degree include:

[0049] First, remove the harmonic signal in the grid data to avoid the interference of the harmonic signal on the calculation results. There are many ways to remove the harmonic signal, which are not limited here;

[0050] Then, discretize the power grid data without harmonic signals, and use the symmetrical component method to decompose the positive sequence component, negative sequence component and zero sequence component of the fundamental wave

[0051] where U p , U n and U 0 are positive sequence components, ne...

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Abstract

The invention relates to a reactive voltage optimization control method and system for a 10kV power supply area, and the method comprises the steps: obtaining the power grid data of all nodes in a power supply area, and calculating the three-phase unbalance degree according to the power grid data; if the three-phase unbalance degree is less than or equal to 2%, determining a node of which the voltage is out of limit according to the power grid data; respectively calculating the voltage sensitivity of each voltage out-of-limit node to each regulation and control unit in the power supply area, and determining the regulation and control unit according to the voltage sensitivity; establishing a regulation and control model; and solving the regulation and control model by adopting a hybrid intelligent algorithm, and outputting a control instruction for the reactive voltage to a regulation and control unit. According to the scheme provided by the invention, the voltage regulation and control effect of distributed photovoltaic is exerted, the combination of hour-level static reactive power optimization and real-time dynamic reactive power optimization of the power distribution network is realized, the voltage of each node of the 10kV power distribution network can be effectively controlled, the voltage fluctuation amplitude is reduced, the frequent action of equipment is avoided, and the economy is considered while the safety is ensured.

Description

technical field [0001] The present invention relates to the technical field of reactive voltage control in electric power systems, and more specifically, to a reactive voltage optimization control method and system in a 10kV power supply area. Background technique [0002] The low-voltage distribution network has problems such as serious three-phase imbalance, long power supply radius, large network loss, poor voltage quality at the end of the line, and lack of intelligent voltage regulation equipment. Limited by the control method and network channel, the AVC (Automatic Voltage Control, automatic voltage control) system range in the traditional voltage control method cannot be extended to the end of the low-voltage distribution network, and there are complex calculations, intelligence and flexibility The shortcomings of the VQC method based on local control and the lack of coordination on the overall level, the control effect is not good. [0003] In addition, my country's...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/50H02J3/38H02J3/18
CPCH02J3/50H02J3/1878H02J3/1864H02J3/381H02J2300/22H02J2203/20Y02E40/30Y02E10/56Y02E40/50
Inventor 郭成张艳萍覃日升李文云
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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