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High-voltage DC power supply system and control method of high-voltage DC power supply system

A power supply system, high-voltage direct current technology, applied in parallel operation of DC power supplies, conversion of irreversible DC power input to AC power output, photovoltaic power generation, etc., can solve problems such as source maintenance and control problems of high-voltage DC power supply systems, and achieve The maintenance methods are flexible and diverse, the maintenance is safe and convenient, and the investment cost is reduced

Pending Publication Date: 2018-01-19
BEIJING POWERTECH
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AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide a high-voltage direct current power supply system, and the second purpose of the present invention is to provide a control method for a high-voltage direct current power supply system to solve the problem of maintenance and control of the source end of the existing high-voltage direct current power supply system

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Embodiment Construction

[0044] Hereinafter, embodiments of the high-voltage DC power supply system and its control method of the present invention will be described with reference to the accompanying drawings.

[0045] The examples described here are specific specific implementations of the present invention, and are used to illustrate the concept of the present invention. They are all explanatory and exemplary, and should not be construed as limiting the implementation of the present invention and the scope of the present invention. In addition to the embodiments described here, those skilled in the art can also adopt other obvious technical solutions based on the claims of the application and the contents disclosed in the description, and these technical solutions include adopting any obvious changes made to the embodiments described here. Replacement and modified technical solutions.

[0046] The accompanying drawings in this specification are schematic diagrams, which assist in explaining the con...

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Abstract

The invention discloses a high-voltage DC power supply system and a control method of a high-voltage DC power supply system. The high-voltage DC power supply system comprises a photovoltaic high-voltage component string; bypass switches connected with positive and negative electrodes of photovoltaic components or connected with positive and negative electrodes of the photovoltaic component string;a DC output control device comprising a DC circuit breaker that is connected with a positive and / or negative electrode of the photovoltaic high-voltage component string; an inverter station that converts a high-voltage DC into an AC; and a DC power transmission line having one end connected to an output end of the DC circuit breaker and the other end connected to an input end of the inverter station. Through the cooperation of the bypass switches and the DC output control device, the system of the invention solves the technical obstacles that the high-voltage DC side switch of a photovoltaicpower station cannot be opened due to the arc-quenching problem, improves the relay protection measures of the DC photovoltaic power station, and makes an electrical system run more securely and reliably.

Description

technical field [0001] The invention belongs to the technical field of high-voltage direct current transmission, and in particular relates to a high-voltage direct-current power supply system and a control method for the high-voltage direct-current power supply system. Background technique [0002] Modern power transmission and distribution methods are still dominated by AC transmission, but the quality of AC power is very high, and many issues such as frequency, power factor, harmonics, ground capacitance current, line impedance, and synchronous processing must be considered. Aspects are starting to show limitations. With its unique characteristics, DC power transmission and distribution technology avoids many of the above problems that AC power needs to consider. Therefore, DC power transmission and distribution, especially high-voltage DC power transmission, has obvious cost advantages and will play a huge role in the current and future power grids. [0003] The current ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/10H02S40/32H02M7/42
CPCY02E10/56
Inventor 刘阳
Owner BEIJING POWERTECH
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