Cooperative control method for participating in frequency modulation and pressure regulation of power system by wind storage cluster

A power system and collaborative control technology, applied in wind power generation, AC network voltage adjustment, electrical components, etc., can solve problems such as lack of coordination, and achieve the effect of improving stability and power quality

Active Publication Date: 2015-02-04
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +3
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the problem in the prior art that only considers the active power output control of the wind farm and only participates in the frequency regulation, and the lack of coordination between the active power output

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  • Cooperative control method for participating in frequency modulation and pressure regulation of power system by wind storage cluster
  • Cooperative control method for participating in frequency modulation and pressure regulation of power system by wind storage cluster
  • Cooperative control method for participating in frequency modulation and pressure regulation of power system by wind storage cluster

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Embodiment Construction

[0068] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0069] figure 1 It is a schematic diagram of the system framework applying the wind storage cluster participating in the system frequency and voltage regulation cooperative control method of the present invention. figure 1 middle v 风速 is the wind speed of the wind farm; d% is the percentage of wind turbine reserve capacity given by the power system scheduling, and the reserved frequency regulation reserve capacity d is generally 5%-10%; Δf is the detected frequency difference of the power system; ΔU is the detected ΔP and ΔQ are the demand for active power and reactive power when the state of the power system changes, respectively; P wind.deload , ω wind.deload , β wind.deload are the active power generated by the wind turbine and the corresponding rotor speed and pitch angle after the load shedding backup module; Q initial is the initial ...

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Abstract

The invention discloses a cooperative control method for participating in the frequency modulation and pressure regulation of a power system by a wind storage cluster. The method comprises the following steps: using the over-speed control and pitch angle control of a wind turbine generator to preserve a part of active power and reactive power for the wind storage cluster as the frequency modulation and pressure regulation standby power of the power system in accordance with the active power and reactive power capacity standby requirements given by the operation condition of a wind power plant, wind speed and the scheduling of the power system; determining the size of the active power and reactive power given by the wind storage cluster in accordance with the state of the wind storage cluster when the frequency or voltage of the power system is fluctuated; and finally, by reference to the capacity limitation of a wind turbine generator and stored energy, determining the final output condition of the wind turbine generator and the stored energy. According to the cooperative control method provided by the invention, the condition that the wind storage cluster participates in the system frequency and voltage regulation, and the stability and electric energy quality of the power system can be effectively improved by less energy storage capacity allocation in the power system with higher wind power permeability.

Description

technical field [0001] The invention relates to a control method for friendly access of a wind farm to a power system, in particular to a coordinated control method for a wind storage cluster to participate in frequency regulation and voltage regulation of the power system. Background technique [0002] With the low-carbon adjustment of China's energy structure, the proportion of renewable energy such as wind energy in my country's energy structure is gradually increasing, and the degree of interaction between renewable energy and the power system is gradually strengthening. [0003] Although renewable energy such as wind power can solve energy and environmental problems to a certain extent, when the penetration rate of wind power is high, the access of wind power will have a certain impact on the safe and stable operation of the power system. [0004] The driving force of wind turbines is wind energy. Due to the intermittent and random fluctuations of wind energy, the power...

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Application Information

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IPC IPC(8): H02J3/38H02J3/00H02J3/16
CPCH02J3/16H02J3/28H02J3/386H02J3/46Y02E10/76Y02E40/30
Inventor 唐西胜高超师长立苗福丰吴涛李善颖邓春邢海瀛
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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