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Harmonic controller for energy-storing system of wind-power plant and parameter-setting method thereof

An energy storage system and parameter tuning technology, applied in harmonic reduction devices, AC network voltage adjustment, AC network to reduce harmonics/ripples, etc., can solve problems such as unsatisfactory control effects and complex processes

Inactive Publication Date: 2015-07-01
HOHAI UNIV
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  • Description
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Problems solved by technology

At the same time, in order to reasonably adjust the parameters in the harmonic controller, the process is complicated and the control effect is often unsatisfactory only by trial and error methods. parameter tuning

Method used

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  • Harmonic controller for energy-storing system of wind-power plant and parameter-setting method thereof
  • Harmonic controller for energy-storing system of wind-power plant and parameter-setting method thereof
  • Harmonic controller for energy-storing system of wind-power plant and parameter-setting method thereof

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Embodiment Construction

[0030] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0031] like figure 1 Shown is the schematic diagram of centralized configuration of energy storage devices in wind farms, such as figure 2 Shown is the topological structure diagram of the centralized energy storage system of the wind farm. With the increasing penetration rate of wind power generation, the impact of the wind power system on the grid system is also increasing. Due to the uncertainty and gap of wind speed, the wind farm The output power fluctuates greatly. Centrally configuring the energy storage system on the output bus of the wind farm can effectively stabilize the output power of the wind farm.

[0032] Therefore, in this example, add such as image 3 The shown energy storage control system based on proportional resonance control adopts double closed-loop control for the bidirectional converter in the energy storage system, so that the energy stor...

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Abstract

The invention discloses a harmonic controller for an energy-storing system of a wind-power plant, which comprises the energy-storing system, a DC (Direct current) / DC converter, an electric network, a bidirectional current transformer, an SPWM (Sinusoidal Pulse Width Modulation) converter and a double closed-loop control system, wherein the double closed-loop control system comprises an outer-ring voltage P1 controller, an inner-ring current PR controller, a first comparator and a second comparator; and the invention also designs a parameter-setting method of the harmonic controller for the energy-storing system of the wind-power plant. According to the invention, the energy-storing system can be inhibited from injecting harmonic waves into the electric network on the basis of controlling the voltage and the current of the energy-storing system to be stable.

Description

technical field [0001] The invention relates to a harmonic controller used for a bidirectional converter in an energy storage system centrally configured on an output bus of a wind farm and a parameter setting method thereof, and belongs to the technical field of wind power grid connection. Background technique [0002] Due to the advantages of abundant resources, energy saving and environmental protection, and mature technology, wind power has become the focus of development in the field of new energy power generation. With the increasing penetration rate of wind power generation, the influence of wind power system on the power grid system is also increasing. Due to the uncertainty and intermittency of wind speed, the output power of wind farms fluctuates greatly, and it cannot output electric energy stably and continuously. In recent years, the method of centrally configuring the energy storage system on the output bus of the wind farm has been widely used, which can stab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01H02J3/12
CPCY02E40/40
Inventor 王冰王亮袁越黄存荣
Owner HOHAI UNIV
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