Method for permanent magnet direct drive wind power generation system to participate in power grid frequency regulation

A wind power generation system and power grid frequency technology, applied in wind power generation, AC network load balancing, single-network parallel feed arrangement, etc., can solve problems including large frequency fluctuations of wind power power systems

Active Publication Date: 2014-04-09
成都储能云谷信息技术有限公司
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Problems solved by technology

[0009] In view of the problem of large frequency fluctuations in existing wind power systems, the purpose of this invention is to provide a method for permanent magnet direct drive wind power generation systems to participate in grid frequency regulation. Stable frequency regulation capability, improving the grid-connected adaptability of wind power system

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  • Method for permanent magnet direct drive wind power generation system to participate in power grid frequency regulation
  • Method for permanent magnet direct drive wind power generation system to participate in power grid frequency regulation
  • Method for permanent magnet direct drive wind power generation system to participate in power grid frequency regulation

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Embodiment Construction

[0067] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0068] see figure 1 and figure 2 , the method for the permanent magnet direct drive wind power generation system of the present invention to participate in grid frequency regulation, the objects involved mainly include: voltage Hall sensor 1, permanent magnet synchronous generator 2, current Hall sensor 3, rotor position sensor 4, abc / dq coordinate transformation module 5, power outer loop control module 6, generator side current inner loop module 7, space vector modulator 8, generator side converter 9, abc / αβ coordinate transformation module 10, αβ / dq coordinate transformation module 11 , grid frequency detection module 12, voltage outer loop control module 13, grid side current inner loop control module 14, grid side converter 15, permanent magnet synchronous motor / generator 16, permanent magnet synchronous motor / generator q-axis current s...

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Abstract

The invention discloses a method for a permanent magnet direct drive wind power generation system to participate in power grid frequency regulation. A generator side converter, a power grid side converter and an energy storage unit side converter are controlled. An energy storage unit converter controls voltage and combines a rotor position angle and direct current link voltage to acquire a PWM drive signal of the energy storage unit side converter through space vector modulation SVM to control a motor. When the motor accelerates to the highest rotation speed, a power / current closed-loop control mode is switched into a rotation speed / current closed-loop control mode, and the rotation speed is given as the rated rotation speed of a flywheel motor. When the flywheel motor continuously slows down to zero, the rotation speed outer ring given value is set to zero, and the rotation speed of the motor is controlled as zero. Through rotation speed / current closed-loop control, the flywheel motor runs at zero speed. According to the method, a wind turbine can acquire a stable frequency regulation ability in all conditions, and the grid connection adaptability of the wind power system is improved.

Description

technical field [0001] The invention relates to wind power generation technology, in particular to a method for a permanent magnet direct drive wind power generation system to participate in power grid frequency regulation, and belongs to the field of new energy power generation. Background technique [0002] The direct-drive wind power generation system using brushless permanent magnet synchronous generator eliminates brushes, slip rings and gearboxes, thus reducing system maintenance costs and improving system reliability. The permanent magnet synchronous power generation system based on dual PWM converters can realize variable-speed constant-frequency power generation operation and independent control of active and reactive power, with high power generation efficiency, relatively simple structure, and good operational stability. Since wind energy is an unstable energy source, the wind speed has the characteristics of uncontrollability, inaccurate prediction and random flu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/30H02J3/24
CPCY02E10/763Y02E10/766Y02E60/16Y02E70/30Y02E10/76
Inventor 姚骏刘奥林周特曾欣
Owner 成都储能云谷信息技术有限公司
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