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Control device and control method for variable-speed water pumping power generation system

A technology of water pumping power generation and control devices, which is applied in the direction of generator control circuit, hydropower generation, and control of generators through magnetic field changes, which can solve the problems of reduced efficiency of water pumps and turbines

Active Publication Date: 2017-01-04
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, there is also the disadvantage that the efficiency of the pump turbine decreases as the speed decreases

Method used

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  • Control device and control method for variable-speed water pumping power generation system
  • Control device and control method for variable-speed water pumping power generation system
  • Control device and control method for variable-speed water pumping power generation system

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Experimental program
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no. 1 approach ）

[0090] refer to Figure 1A ~ Figure 1D , Figure 2 to Figure 5 as well as Figure 9 , the first embodiment will be described.

[0091] Figure 1A ~ Figure 1D It is a figure which shows an example (part 1 - part 4) of the schematic structure of the variable-speed pumping power generation system of 1st Embodiment. also, Figure 9 for Figure 1D The detailed structure diagram of the variable speed pumping power generation system shown.

[0092] The variable speed pumping power generation system is a system that can make the generator motor run at a non-synchronous speed, including: the pump turbine 1, which is directly connected to the generator motor 2; the generator motor 2; the secondary excitation device 3, which flows through the secondary winding of the generator motor 2 overcurrent; the guide vane control device 4 controls the opening of the guide vane (guide vane) controlling the flow of the pump turbine 1; the output control unit 5 is based on the generator motor o...

no. 2 approach ）

[0128] Refer to the above Figure 1A ~ Figure 1D , Figure 2 to Figure 5 , the second embodiment will be described. Hereinafter, the description of the parts common to the first embodiment will be omitted.

[0129] In the present embodiment, the optimization processing unit 9 outputs the command value P ＊ and generator motor output demand value P 0 The generator motor output demand value P is extracted from the difference of 0 rapidly changing components. Then, the extracted high-speed change components are used as the effective part of the generator-motor secondary current I 2R0 correction value.

[0130] Even if the opening of the guide vane is equal to the required output value of the generator motor P 0 Therefore, the effect cannot be expected, and it will only cause mechanical stress (stress) or wear of the guide vane and its driving mechanism, so this situation is being avoided. The effective part I of the secondary current of the generator motor without limiting...

no. 3 approach ）

[0132] further reference Image 6 , the third embodiment will be described. Hereinafter, descriptions of parts common to the first embodiment and the second embodiment are omitted.

[0133] Image 6 is expressed as ω of the third embodiment 2 It is a diagram showing an example of the circuit configuration related to the control unit 106 . Should Image 6 The circuit configuration is equivalent to that described in Figure 4 A modified example of the circuit configuration on the lower side. exist Image 6 In, a response adjuster 133 is also provided.

[0134] Image 6 The response regulator 141, ω 2 controller 142 are respectively equivalent to Figure 4 Response modifier 126, ω in 2 Controller 127.

[0135] In the present embodiment, the response adjuster 133 converts the system frequency deviation Δf into the generator motor output, and obtains the change amount of the generator motor output which changes rapidly. In addition, whether it is desired to increase th...

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Abstract

In one embodiment, a control system of a variable speed pumped storage hydropower system includes an optimization processing unit configured to calculate a flow rate adjusting valve opening demand value and a first command value, a speed control unit configured to generate a secondary current active power component command value of a secondary excitation device based on the first command value, a mechanical (pump-turbine) output compensation unit configure to calculate a compensation value of the opening of the flow rate adjusting valve and / or a compensation value of the generator-motor output, and an output control unit configured to generate a flow rate adjusting valve opening command value based on the generator-motor output command value, the flow rate adjusting valve opening demand value, the compensation value calculated by the mechanical output compensation unit, and the output detection value of the generator-motor.

Description

technical field [0001] Embodiments of the present invention relate to a control device and a control method of a variable-speed pumping power generation system (system). Background technique [0002] If an unbalance of supply and demand occurs in the power system, the frequency changes. The generator motor in the power system detects the frequency change of the system, increases or decreases the output (effective power) according to the change range, and suppresses the frequency change of the system. In the case of a synchronous generator motor, if the output of the prime mover does not change, the output of the generator motor does not change either. Therefore, the response speed of the output of the generator motor is affected by the response speed of the output of the prime mover, and the output cannot be controlled at high speed. On the other hand, a variable-speed pumping power generation system using a double-fed generator motor can control the output of the generato...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/04H02P9/14
CPCH02P9/007H02P9/04Y02E10/20F03B13/10F03B15/02
Inventor 楠清志盐崎裕一石月照之柳泽忠洋
Owner KK TOSHIBA
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