Method for calculating running power capacity of alternating-current excitation pumped storage unit
A pumped storage unit, AC excitation technology, applied in hydroelectric power generation, measuring electric power, mechanical equipment, etc., can solve problems such as inability to accurately obtain unit active power characteristics and reactive power operating limits, difficult unit characteristic scheduling, etc.
Inactive Publication Date: 2020-11-10
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
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Problems solved by technology
However, at present, there is no calculation method for calculating the operating power capacity of the pumped storage unit considering the electromechanical characteristics and different operating conditions, and it is impossible to accurately obtain the active power characteristics and reactive power operating limit of the unit, and it is difficult to accurately analyze the unit characteristics in the optimal dispatch of the power grid. and scheduling
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[0037] The specific embodiment of the present invention is as shown in the accompanying drawings.
[0038] The reactive power calculation process of the pumped storage unit under power generation conditions is as follows: figure 1 shown.
[0039] H T , turbine rotor speed ω r The value of is substituted into the active capacity function expression of the pumped storage unit: P g (H T ,ω r ) = 0.8ω r +0.2H T -0.12; Calculate the active power P of the AC excitation motor of the pumped storage unit g .
[0040] Input the relevant parameters of the AC excitation motor to calculate the reactive power limit of the AC excitation motor of the pumped storage unit:
[0041]
[0042] Among them, Q gmin is the minimum value of reactive power of AC excitation motor under power generation condition; Q gmax It is the maximum value of reactive power of AC excitation motor under power generation condition.
[0043] The reactive power calculation process of the pumped storage uni...
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A method for calculating the running power capacity of an alternating-current excitation pumped storage unit. The method comprises the following steps of (1) based on an electromagnetic equivalent circuit of an alternating-current excitation motor, considering the stator side power and rotor side power, and deducing a power function of the alternating-current excitation motor connected to a powergrid side under power generation and electric working conditions; (2) considering the working characteristics of a pump turbine under power generation and electric working conditions, and deriving a mechanical power function of a pumped storage unit taking a water head and a rotating speed as variables; and (3) proposing a calculation method and process for the running power limit of the alternating-current excitation pumped storage unit under two working conditions. Compared with the prior art, the calculation method comprehensively considers the constraint conditions, such as water head, flow, unit working conditions, etc., and is a practical method capable of being used for peak regulation and frequency modulation optimization calculation of a power system.
Description
technical field [0001] The invention relates to a method for calculating the operating power capability of an AC excitation pumped storage unit, which belongs to the technical field of storage power stations. Background technique [0002] The pumped storage unit based on the AC excitation motor can not only improve the operating efficiency of the pump turbine, improve the operating conditions, and improve the independent frequency regulation capability under the pump working condition, but also improve the stability of the system through the rapid adjustment of active power and reactive power. It has unique advantages in FM. However, at present, there is no calculation method for calculating the operating power capacity of the pumped storage unit considering the electromechanical characteristics and different operating conditions, and it is impossible to accurately obtain the active power characteristics and reactive power operating limit of the unit, and it is difficult to ...
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IPC IPC(8): G01R21/00G01R31/34F03B13/06
CPCG01R21/002G01R21/003G01R31/343F03B13/06Y02E10/20Y02E60/16
Inventor 钟逸铭熊华强万勇潘本仁崔斌张妍王冠南桂小智周仕豪
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST