Primary frequency modulation control method and system for photovoltaic power station based on multi-master station coordination control

A technology for photovoltaic power plants and control systems, applied in photovoltaic power generation, electrical components, circuit devices, etc., can solve problems such as the reduction of the moment of inertia of the power grid and the equivalent scale, and the fact that new energy units do not have the characteristics of the moment of inertia of conventional units. The effect of frequency response

Active Publication Date: 2019-03-19
STATE GRID SHAANXI ELECTRIC POWER RES INST +3
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Problems solved by technology

[0005] At present, photovoltaic power plants have not yet participated in the primary frequency regulation of the power grid. Since new energy units do not have the moment of inertia characteristics of c

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  • Primary frequency modulation control method and system for photovoltaic power station based on multi-master station coordination control
  • Primary frequency modulation control method and system for photovoltaic power station based on multi-master station coordination control
  • Primary frequency modulation control method and system for photovoltaic power station based on multi-master station coordination control

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[0034] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] In the description of the present invention, it should be understood that, in the description of the present invention, unless otherwise specified, "plurality" means two or more. In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

[0036] refe...

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Abstract

The invention discloses a primary frequency modulation control method and system for a photovoltaic power station based on multi-master station coordination control. The method comprises the steps that the active power of the grid-connected point of the photovoltaic power station is collected in real time; since AGC load shedding control reserves power reserve capacity for the photovoltaic power station, the active power of the grid-connected point of the photovoltaic power station is active power Pref when the photovoltaic power station has the load shedding level described in the description; when the grid frequency exceeds the artificial dead zone DB disturbance of primary frequency modulation, a PFC control system calculates the active power variation delta P after frequency fluctuation, and the target value Pset=Pref+ delta P is given to the active power issued to an inverter group; and the active power of the photovoltaic power station is changed to achieve primary frequency modulation. The scheme simply needs to upgrade the algorithm of the control software of a conventional photovoltaic power station inverter, and adds a PFC master station coordination mechanism based on the existing AGC function of the power station, so as to realize multi-master station coordination control of AGC and PFC. Cost can be maximized. The primary frequency modulation function of the photovoltaic power station is used to speed up the frequency recovery of a grid.

Description

technical field [0001] The invention belongs to the technical field of photovoltaic power station inverter grid connection, and in particular relates to a primary frequency modulation control method and system of a photovoltaic power station based on multi-master coordinated control. Background technique [0002] Solar energy, as a sustainable new energy source, has attracted more and more attention from all over the world due to its non-pollution and renewability. In recent years, my country's photovoltaic power generation industry has developed rapidly, and the installed capacity of photovoltaic power plants has continued to increase. As more and more large-capacity photovoltaic power plants are directly integrated into the power grid, the interaction between photovoltaic power generation systems and power grids has become more and more complicated. . [0003] In solar power generation technology, the photovoltaic cell power generation system is widely used at present. Th...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/38
CPCH02J3/383H02J3/24Y02E10/56
Inventor 万天虎李华迟方德郭晨李立唐浩李勋城刘鹏涛
Owner STATE GRID SHAANXI ELECTRIC POWER RES INST
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