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A reactive power control method for a water-light complementary power station

A water-light complementary and power control technology, applied in reactive power compensation, AC network voltage adjustment and other directions, can solve the problem of unmentioned reactive power control content and methods, improve control response performance, reduce system control cost, guarantee The effect of grid voltage

Inactive Publication Date: 2018-12-28
北京科诺伟业科技股份有限公司
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Problems solved by technology

CN 106549421 A "A Hydropower and Photoelectric Multi-objective Optimum Design and Coordinated Control Method" proposes a hydropower and photoelectric multi-objective optimal design and coordinated control method, but does not mention specific content and methods related to reactive power control

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  • A reactive power control method for a water-light complementary power station
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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] The schematic diagram of the reactive power control scheme of the present invention is as follows figure 1 shown.

[0030] The reactive power control method for the hydro-photovoltaic hybrid power station mainly realizes the voltage control of the grid-connected point of the hydro-photovoltaic hybrid power station through the hydroelectric unit and the photovoltaic inverter.

[0031] 101 is the total reactive power demand of the water-solar hybrid power station, that is, the total reactive power setting value Q ref . During control, the output reactive power 102 is controlled by the excitation system of the hydropower unit, that is, the reactive power value Q of the excitation system of the hydropower station 水 , total reactive power setting value Q ref and the reactive power value Q of the excitation system of the hydropower station...

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Abstract

The invention relates to a reactive power control method for a water-light complementary power station, which is used for grid-connected point voltage control of the water-optical complementary powerstation, and the reactive power support thereof is realized by a hydropower unit and a photovoltaic inverter. When the voltage fluctuates, the inertia of the excitation system is relatively large, theexcitation lag and the reactive power response deviation exist. The deviation is regarded as the reactive power setting of the photovoltaic inverter to compensate the reactive power response deviation. When the excitation system is adjusted, the reactive power output of the photovoltaic inverter decreases gradually, and the grid point voltage is mainly controlled by the hydroelectric excitation system. In order to prevent frequent operation of hydroelectric generating units and photovoltaic inverters, the dead-time range of voltage deviation is set. If the voltage deviation exceeds the dead-time range, the closed-loop control is effective. At the same time, in order to improve the response speed of voltage loop, the final reactive power setting value is obtained by compensating the reactive power loss of the water-optical complementary power station.

Description

technical field [0001] The invention relates to a control method for a water-light complementary power station. Background technique [0002] Photovoltaic power generation is a power generation method that uses solar panels to convert light energy into electrical energy. Due to the great influence of day and night, seasons, weather and other factors, its power generation output is random, fluctuating and intermittent. Large-capacity photovoltaic power plants are directly connected to the grid, which will easily have an adverse effect on the stable operation of the power system. However, if the photoelectricity is sent to the hydropower station, due to the large reservoir capacity and strong adjustment ability of the hydropower station, the hydroelectric unit can start quickly, adjust flexibly, and respond quickly to the load. Real-time compensation for the output of the photoelectricity can stabilize the fluctuation and random output of the photoelectricity. , to ensure tha...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16
CPCH02J3/16Y02E40/30
Inventor 高俊娥许洪华
Owner 北京科诺伟业科技股份有限公司
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