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A system transient characteristic wave detection method for common network control of photovoltaic microgrid

A technology of transient characteristics and detection methods, applied in the directions of photovoltaic power generation, single-network parallel feeding arrangement, spectral analysis/Fourier analysis, etc., can solve the problems affecting the safe operation of the municipal power grid and affect the safe operation of the municipal power grid, and achieve The effect of ensuring safe operation

Inactive Publication Date: 2015-09-30
西东控制集团(沈阳)有限公司
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Problems solved by technology

When this kind of application is not common, it will not have a great impact on the safe operation of the municipal power grid
If this kind of application is widely promoted, even if the reverse power of each device is very small, due to its large number of existence, its combined effect will inevitably affect the safe operation of the municipal power grid

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  • A system transient characteristic wave detection method for common network control of photovoltaic microgrid
  • A system transient characteristic wave detection method for common network control of photovoltaic microgrid

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Embodiment Construction

[0021] A system transient characteristic wave detection method for photovoltaic microgrid common network control is based on the power system transient process theory, any microgrid system including photovoltaic power and municipal power in steady state operation, when the system After any event that changes the original stable state occurs, it will go through a transient process within a certain period of time and re-stabilize to a new stable state operation, that is, a transient process must occur.

[0022] For example: in the above-mentioned micro-grid system including photovoltaic power, municipal power, and power loads, when the power consumption of the load is much greater than that of photovoltaic power, the system is mainly powered by municipal power, and the contribution of photovoltaic power to system power supply is minimal. The local change of the load power in the system will not cause the reverse power to occur. However, when the photovoltaic power in the system ...

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Abstract

The invention provides a method for detecting system transient characteristic waves for shared network control on a photovoltaic micro-grid. With the adoption of a transient protection theory for a power system, when photovoltaic power and municipal power are simultaneously supplied to loads, super-speed characteristic wave detection and super-speed characteristic wave pre-decision are performed on important transient change occurring in a micro-grid system; moreover, a shared network control inversion device performs zero countercurrent protection and anti-islanding effect protection control on the system. The zero countercurrent on the municipal power grid is effectively implemented by the photovoltaic micro-grid, so that the safety of a large power grid is ensured.

Description

technical field [0001] The invention relates to the technical field of solar photovoltaic grid-connected power generation control, in particular to a photovoltaic micro-grid system for co-network application in which solar photovoltaic power and municipal power supply power to loads, and is used to prevent photovoltaic power from feeding power to the municipal power grid and realize The system has equipment-level intrinsically safe zero backflow to the municipal power grid; including a system transient characteristic wave detection method for photovoltaic micro-grid common network control that realizes anti-islanding effect protection for the system when the system mains power is lost. Background technique [0002] At present, renewable new energy including solar power generation and wind power generation (this patent description only takes the application of solar photovoltaic power generation as an example) is developing very rapidly. One of the main application methods is ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38G01R23/16
CPCY02E10/563Y02E10/56
Inventor 刘叶兵石亚和贾宁邢岩王欣蒋平王立武
Owner 西东控制集团(沈阳)有限公司
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