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Frequency modulation method based on new energy supporting machine and energy storage device and new energy station

An energy storage device and new energy technology, applied in the direction of circuit devices, AC network circuits, single-network parallel feeding arrangements, etc., can solve problems such as system frequency reduction, wind farm output sudden drop, blackout accidents, etc., to achieve regularity Strong, good real-time performance, and the effect of improving the safety of use

Inactive Publication Date: 2021-12-17
CHINA ELECTRIC POWER RES INST
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Problems solved by technology

However, due to the insufficient ability of the wind turbines in the North Sea Power Grid to withstand low frequencies, a large number of wind turbines were subsequently disconnected from the grid, and the output of the wind farm dropped sharply, resulting in a further reduction in system frequency and triggering the low-frequency load shedding protection action of the grid to shed part of the load, resulting in Blackout

Method used

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  • Frequency modulation method based on new energy supporting machine and energy storage device and new energy station
  • Frequency modulation method based on new energy supporting machine and energy storage device and new energy station
  • Frequency modulation method based on new energy supporting machine and energy storage device and new energy station

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[0065] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0066] Unless otherwise stated, the terms (including scientific and technical terms) used herein have the meanings commonly understood by those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or overly ...

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Abstract

The invention discloses a frequency modulation method, device and system based on a new energy supporting machine and an energy storage device and a new energy station. The method comprises the following steps of: acquiring a system frequency deviation value; determining a frequency modulation scheme for the new energy supporting machine and / or the energy storage device according to the system frequency deviation value; and according to the frequency modulation scheme, generating a frequency modulation instruction for the new energy supporting machine and / or the energy storage device, so as to enable the new energy supporting machine and / or the energy storage device to execute the corresponding frequency modulation instruction to adjust the system frequency. The method is high in regularity, flexible in rule adjustment and good in real-time performance. When the system frequency of a power grid fluctuates, a new energy supporting machine with better durability is selected to provide support for the power grid. Only when the system frequency fluctuation is too large, an electrochemical energy storage device with relatively poor durability is selected to support the power grid together. Therefore, the input frequency of the energy storage device is reduced, the safe operation of the energy storage device is realized, and the use safety of the energy storage device is improved.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control, and specifically relates to a frequency modulation method, device, system and new energy station based on a new energy support machine and an energy storage device. Background technique [0002] On August 9, 2019, a major power outage occurred in the UK. The Little Barford gas power station was shut down correctly before the accident. The system frequency of the North Sea grid has been reduced following the loss of generating load from the gas-fired power station. However, due to the insufficient ability of the wind turbines in the North Sea Power Grid to withstand low frequencies, a large number of wind turbines were subsequently disconnected from the grid, and the output of the wind farm dropped sharply, resulting in a further reduction in system frequency and triggering the low-frequency load shedding protection action of the grid to shed part of the load, resulting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/28H02J3/38H02J3/48
CPCH02J3/241H02J3/28H02J3/38H02J3/381H02J3/48H02J2300/20H02J3/32H02J3/30
Inventor 孙华东李文锋郭强张健魏巍李志强贾媛王晖艾东平孙航宇
Owner CHINA ELECTRIC POWER RES INST
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