Electric network power oscillation inhibitor based on photovoltaic battery

A technology of grid power and photovoltaic cells, which is applied in the direction of reducing/preventing power oscillation, etc., and can solve problems such as grid hazards

Inactive Publication Date: 2007-11-07
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The designed power grid power oscillation suppressor based on photovoltaic cells uses clean and renewable energy - solar energy to suppress power oscillations; at present, people only use photovoltaic cells for power generation, and no one thinks of using them to suppress The power oscillation of the system, and the harm of power oscillation to the power grid is huge, and it is very urgent and important to suppress the power oscillation to the power grid, especially the large-scale power grid. Therefore, the present invention is a brand new concept and subject

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  • Electric network power oscillation inhibitor based on photovoltaic battery
  • Electric network power oscillation inhibitor based on photovoltaic battery

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Embodiment Construction

[0057] Figure 1 shows the grid power oscillation suppressor 8 based on photovoltaic cells. It consists of photovoltaic panels 1, photovoltaic inverter 2, filter 3, grid-connected transformer 4, controller 5, voltage transformer 6, and current transformer. The following is a detailed description of each component:

[0058] 1 is a photovoltaic panel, which can be composed of multiple photovoltaic cells, convert solar energy into electrical energy, and output DC voltage;

[0059] 2 is a photovoltaic inverter, which inverts direct current into alternating current and sends it to the grid. The inverter consists of a voltage source type that can be quickly turned off. It has a fast active and reactive power adjustment capability;

[0060] 3 is a filter, which filters out the high frequency harmonics output by the photovoltaic inverter, so that the voltage waveform output by the inverter after the filter is basically consistent with the grid voltage waveform;

[0061] 4 is a grid-connect...

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Abstract

A network power oscillation suppressor based on photovoltaic batteries characterizes that it is a device for suppressing network power oscillation based on photovoltaic barriers, which converts solar energy into electric energy by a solar energy battery board and outputs DC voltage then to invert it to AC voltage to be transmitted to the network, in which, it can carry out active regulation to the network or carry out reactive regulation to the system since the inverter is composed of voltage source type quick switch off components and outputs part of active power to the network when operating normally and regulates active and reactive powers output by the oscillation suppressor based on the control rule when power oscillation happens to the network.

Description

Technical field [0001] A grid power oscillation suppressor based on photovoltaic cells belongs to the technical field of grid power oscillation suppression. Background technique [0002] In order to optimize the allocation of resources on a larger scale, improve the economic efficiency of the power grid, and increase the efficiency of accident support, China's electric power is developing towards a large-scale network. The strategic pattern of "power transmission from west to east, mutual supply between north and south, and national interconnection" is gradually taking shape. However, With the increasing scale of the grid and the increasing complexity of the structure, the stability of the grid is very important. Especially for weakly interconnected AC grids and AC / DC interconnected grids, the power oscillation problem is particularly prominent, which directly threatens the security and stability of the grid Therefore, domestic and foreign scholars have conducted a lot of researc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
Inventor 孙元章李国杰刘建政黎雄阮思烨
Owner TSINGHUA UNIV
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