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A photovoltaic power station active power output control system and method

A photovoltaic power station and active power output technology, which is applied in photovoltaic power generation, collectors, electric vehicles, etc., can solve problems such as over-conforming operation, unstable photovoltaic power supply, and full load of photovoltaic power stations, so as to prevent overload operation and meet power supply time Requirements, Effects of Maintaining Efficiency Values

Inactive Publication Date: 2021-05-04
冯辉
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some use energy storage devices to suppress the impact of photovoltaic system active output fluctuations on grid voltage stability, but additional energy storage devices and complex control technologies are required
[0003] Due to the instability and randomness of photovoltaic power supply over time, the stability of the active power output of photovoltaic power plants cannot be effectively guaranteed, resulting in the inability of photovoltaic power plants to self-adaptively meet the needs of the load, especially when the load needs to provide high-power power for a period of time , it is easy to cause the photovoltaic power station to run at full load or exceed compliance, which seriously affects the safety and service life of the photovoltaic power station

Method used

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  • A photovoltaic power station active power output control system and method
  • A photovoltaic power station active power output control system and method
  • A photovoltaic power station active power output control system and method

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Embodiment Construction

[0051]The application will be described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific embodiments are only used to further illustrate the application, and cannot be interpreted as limiting the protection scope of the application. The above application content makes some non-essential improvements and adjustments to this application.

[0052] Such as figure 1 Shown is a schematic diagram of the method for controlling the active power output of a photovoltaic power plant in this application, including the following steps:

[0053] 1) Calculate the active power sensitivity and the sum of sensitivities at the grid-connected points of each photovoltaic power generation unit inside the photovoltaic system;

[0054] 2) Determine the P(U) strategy algorithm according to the sensitivity, obtain the grid-connected point voltage U and output the load demand power P* of the photovoltaic power station throug...

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Abstract

The invention discloses a photovoltaic power station active power output control system and method, comprising the following steps: 1) calculating the active power sensitivity and the sum of the sensitivity at the grid connection points of each photovoltaic power generation unit in the photovoltaic system; 2) determining a P(U) strategy algorithm according to the sensitivity , obtain the grid-connected point voltage U and output the load demand power P* of the photovoltaic power station through the P(U) strategy algorithm; 3) The photovoltaic power station load demand power P* and the photovoltaic power generation unit Ppvmax are processed by the subtractor to determine whether the electric energy storage device is input and output active power ; 4) Determine the time when different electric energy storage devices are put into the system according to the time when the load requires power; 5) According to the determined number of photovoltaic power generation units put into the photovoltaic power station and the time when the electric energy storage device is put into the system, control the photovoltaic power plant to output active power. The invention can safely and efficiently control the output of the photovoltaic power station.

Description

technical field [0001] The application belongs to the technical field of new energy power supply, and in particular relates to a photovoltaic power station active power output control system and method. Background technique [0002] In recent years, with the continuous reduction of photovoltaic system costs and the maturity of photovoltaic grid-connected technology, large-scale photovoltaic power generation has become more and more favored by the international community. Large-scale photovoltaic power plants are generally built in remote areas with abundant solar energy resources. Compared with small and medium-sized photovoltaic systems, solar energy can be used more intensively, and parallel inverters can be controlled and managed. However, as the proportion of photovoltaic power generation in the power grid continues to increase, photovoltaic power needs to be transmitted to the load center over long distances, and the photovoltaic system has an adverse effect on the grid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/48H02J3/38H02J7/34
CPCH02J3/383H02J3/48H02J7/345H02J2203/20Y02E10/56
Inventor 冯辉冯晨皓郭芳
Owner 冯辉
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