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Grid-connected overvoltage control system

An overvoltage and voltage suppressor technology is applied in the field of grid-connected overvoltage control systems, which can solve the problems of poor power quality, easy damage, and reduced grid-connected voltage qualification rate.

Pending Publication Date: 2021-12-31
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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  • Application Information

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Problems solved by technology

[0003] However, the grid-connected power generation using the voltage control method of the maximum power point tracking controller will lead to large fluctuations in the grid-connected voltage of the photovoltaic system, a decrease in the qualification rate of the grid-connected voltage, and poor power quality. If the distribution voltage is too high, the equipment will work for a long time Easily damaged under high voltage

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Embodiment Construction

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0053] figure 1 An optional system architecture for the grid-connected overvoltage control provided by the embodiment of this application, such as figure 1 As shown, the system architecture may include a tap converter 10 , an overvoltage suppressor 20 and a power storage 30 .

[0054] Among them, the voltage regulating converter 10, the overvoltage suppressor 20 and the power storage device 30 all support the function of sending and receiving information, and can display every resu...

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Abstract

The invention discloses a grid-connected overvoltage control system, which comprises a voltage regulation converter, an overvoltage suppressor and a power accumulator; the voltage regulation converter obtains a grid-connected real-time load current signal, a voltage value of a direct current transmitted to the power accumulator, and a charging and discharging power parameter of the power accumulator; the overvoltage suppressor obtains a grid-connected real-time voltage signal and charging and discharging power parameters and charge parameters of the power accumulator, the grid-connected load power in the future time period is predicted according to the grid-connected load power in the current time period, and the grid-connected overvoltage regulation quantity used for controlling the grid-connected voltage is obtained through combined processing of the voltage regulation converter and the overvoltage suppressor. Therefore, according to the invention, the grid-connected electric energy parameters are acquired in real time, the voltage regulation converter and the overvoltage suppressor are combined to carry out real-time overvoltage control, the abnormal grid-connected voltage fluctuation is effectively controlled in time, the voltage fluctuation is prevented from becoming large, the qualified rate of the grid-connected voltage is improved, and the grid-connected electric energy quality is improved.

Description

technical field [0001] The present application relates to the technical field of voltage control, and more specifically, relates to a grid-connected overvoltage control system. Background technique [0002] With the improvement of people's quality of life, people's electricity consumption is also increasing rapidly. In order to meet people's demand for electricity, photovoltaic power generation with a large power generation is used for power generation. At present, in the distributed photovoltaic power generation system, there are multiple distributed photovoltaic grid-connected points. Due to the large power of photovoltaic power generation, sometimes there will be reverse power transmission to the upper power grid, and the voltage of some grid-connected points and public connection points will be raised to exceed Rated limit. In view of this situation, the current grid-connected inverter of the distributed photovoltaic power generation system adopts the maximum power poin...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/46H02J3/24
CPCH02J3/381H02J3/46H02J3/24H02J2300/24Y02E10/56
Inventor 何嘉兴方健张敏杨帆
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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