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A control method and system for primary frequency modulation of wind storage system

A control method, a technology of system frequency, applied in the direction of reducing/preventing power oscillation, AC network circuits, electrical components, etc., can solve problems such as poor power distribution characteristics, ensure stable operation, avoid circulating current, prevent overcharging or deep charging The effect of discharge

Active Publication Date: 2022-08-05
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a control method and system for the primary frequency regulation of the wind storage system, aiming to solve the problem of poor power distribution characteristics in the primary frequency regulation of the existing wind storage system

Method used

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  • A control method and system for primary frequency modulation of wind storage system
  • A control method and system for primary frequency modulation of wind storage system
  • A control method and system for primary frequency modulation of wind storage system

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Embodiment

[0106] The parameters of the system are shown in Table 1:

[0107] Table 1

[0108] parameter Numerical value parameter Numerical value Fan rated power P B / MW

1.5MW Rotor inertia control coefficient K IR

0.1 Fan rated line voltage V B / kV

0.69kV communication weight a ij

10 System rated frequency f ref / Hz

50Hz SoC coefficient K PSoC,i ,K ISoC,i

0.01,0.2 Stator resistance R s / pu.

2.40mΩ Fan DC side voltage V dc / kV

1.2kV Rotor resistance R r / pu.

1.69mΩ Fan DC side capacitor C dc / F

0.03F Stator inductance L s / pu.

2.343mH Inductance L / mH 10mH Rotor inductance L r / pu.

2.343mH battery capacity C bat,1 / kWh

4kWh Excitation inductance L m / pu.

2.199mH battery capacity C bat,2 / kWh

4kWh Stator-rotor turns ratio r 0.335 battery capacity C bat,3 / kWh

2kWh Moment of inertia J / s 4.63s battery capacity C ...

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Abstract

The present invention disclosed a control method and system for a single frequency adjustment for wind storage systems, which belongs to the field of electrical engineering technology, including the underlying dual -feeder asynchronous wind power generator DFIG vector control and energy storage system ESS dual -closed control. The upper power consistency control controlConsistency control of Lochian status SOC.The underlying control to ensure the normal operation of the fan and energy storage system, and the power distribution of the upper -level control regulatory fan and energy storage system: Based on power -based control to ensure that energy storage equipment can be adjusted in real time according to its different capacity.Sexual protocols adjust the reference power of the DFIG network -side variables to ensure that all energy storage devices are adjusted according to the SOC output under the premise of charging and discharge at the same time.In this way, the present invention can effectively adjust the output power of the wind storage in real time to ensure the stable frequency of the wind farm.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and more particularly relates to a control method and system for primary frequency modulation of a wind storage system. Background technique [0002] In recent years, energy storage has been rapidly developed and applied. In the power system including wind power, the frequency regulation of the energy storage auxiliary system can realize the energy storage absorption and release of active power, and its performance is stable, the control is flexible, and the response is fast. Therefore, in addition to utilizing the adjustment capability of the wind turbine itself, configuring a certain capacity of energy storage in the wind turbine or wind farm can assist the wind power to participate in the frequency regulation process of the system, and can avoid the secondary reduction of the system frequency caused by the inertial control of the wind turbine rotor. question. [0003] When ins...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
CPCH02J3/241
Inventor 陈霞陈思源杨丘帆周建宇文劲宇
Owner HUAZHONG UNIV OF SCI & TECH
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