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Control method for stabilizing wind and photovoltaic power fluctuation with hydropower and storage energy

A technology of power fluctuation and control method, which is applied in the control field of power fluctuation stabilization of distributed power generation system, and can solve the problems of inability to absorb power, inability to accurately track high-frequency signals, and slow response.

Active Publication Date: 2014-09-10
TSINGHUA UNIV
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Problems solved by technology

However, due to the slow response of hydropower system output adjustment, it is impossible to accurately track high-frequency signals; at the same time, hydropower can only emit power but not absorb power, which also limits the role of hydropower in stabilizing power fluctuations

Method used

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  • Control method for stabilizing wind and photovoltaic power fluctuation with hydropower and storage energy
  • Control method for stabilizing wind and photovoltaic power fluctuation with hydropower and storage energy
  • Control method for stabilizing wind and photovoltaic power fluctuation with hydropower and storage energy

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Embodiment Construction

[0038] The control method for hydropower and energy storage to stabilize wind power fluctuations proposed by the present invention is described in detail in conjunction with the accompanying drawings and examples as follows:

[0039] The distributed power generation system to be controlled in this embodiment includes four subsystems of wind power, hydropower, photovoltaic power generation, and energy storage. The topology of the system is as follows: figure 1 As shown, the wind electronic system is composed of 20 1.5MW wind turbines, the photovoltaic power generation system is composed of 20 500kW photovoltaic arrays, the hydroelectric system is composed of two 9MW hydroelectric generators, and the energy storage subsystem is composed of 50 100kW battery packs They are all connected to the grid through switches and 10KV / 0.4KV transformers.

[0040] The control method of this embodiment, such as figure 2 shown, including the following steps:

[0041] 1) Collect the command v...

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Abstract

The invention relates to a control method for stabilizing wind and photovoltaic power fluctuation with hydropower and storage energy, and belongs to the technical field of new energy power generation control. According to the method, a distributed power generation system to be controlled comprises a wind power subsystem, a hydropower subsystem, a photovoltaic power generation subsystem and a storage energy subsystem. The method includes inputting power instruction values, wind power output and photovoltaic output of a grid as required into a collecting system; then, sequentially performing power distribution, amplitude limiting cooperation and power correction on the collected information to obtain output instructions of hydropower and storage energy; finally, summing the obtained actual output power of hydropower and storage energy and the output power of the wind power and photovoltaic power generation to obtain the power input to the major grid by the entire power generation system. The control method can stabilize the power fluctuation of new energy power sources with low-cost hydropower and storage energy as well as can maintain safe and stable operations of the system.

Description

technical field [0001] The invention belongs to the technical field of control in new energy power generation, and in particular relates to a control method suitable for power fluctuation stabilization of a distributed power generation system. Background technique [0002] In today's society, energy and the environment are getting more and more attention. At the same time, new energy distributed power generation technology has also developed rapidly. New energy distributed power generation mainly includes wind power generation, photovoltaic power generation and other power generation forms. However, these distributed power sources are affected by changes in the natural environment, and their output active power is often fluctuating and intermittent. When they are connected to the grid on a large scale, they will have a great negative impact on the stability of the grid. Therefore, it is imperative to study the control methods to stabilize the output power fluctuations of wi...

Claims

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Application Information

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IPC IPC(8): H02J3/28
CPCY02E10/766Y02E70/30Y02E10/76
Inventor 陈来军陈天一梅生伟郑天文
Owner TSINGHUA UNIV
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