TWI405390B - A wind power simulation device - Google Patents

Abstract

A wind power simulation device for receiving a utility-line signal from the utility line system to simulate a variable-frequency-variable-voltage signal from a permanent-magnet synchronous generator, comprises a power-generator unit, which connects with the utility-line system to receive the utility-line signal, and translates the utility-line signal to a variable-frequency-variable-voltage first AC signal, and a modified unit that connects with the power-generator unit and the utility line system individually to receives the first AC signal and translates it to the second AC signal, and output the second AC signal to the utility line system finally.

Description

Wind power simulation device

The invention relates to a power generation simulation system, in particular to a wind power generation simulation system.

Referring to FIG. 1, in general, a wind power plant includes a wind turbine 91, a permanent magnet synchronous generator 92, and an adjustment unit 93.

The wind turbine 91 is driven by the wind to drive the permanent magnet synchronous generator 92 to generate a first alternating current signal, and then the first alternating current signal is adjusted by the adjusting unit 93 to generate an output alternating current signal, and the output alternating current signal is transmitted to A mains system 8 is on.

However, before the wind power generation device is activated, its system reliability must be via a system simulation program to obtain the relevant state parameters of the wind power generation device in different states. However, traditionally, the equipment of the wind power generation device is quite large and It is expensive, so it is difficult to complete the system simulation before the construction. It is often necessary to wait until the construction is completed before the system simulation can be performed to adjust the relevant parameters. In addition, the wind power generation device is in normal operation or system. During the simulation, a burn-in test phase is required before starting to ensure that the wind power generation device can provide the output AC signal with high reliability and stable frequency before transmitting the output AC signal to the utility system 8. Therefore, referring to FIG. 2, when the wind power generation device 9 is in the burn-in test phase, the output end of the adjustment unit 93 (so-called load end) needs to be electrically connected to a resistive load 90, so that the permanent magnet generator 921 The electrical energy of the alternating current signal generated during the burn-in test phase can be released until the permanent magnet generator 9 After the completion of the burn-in test, the output of the adjustment unit 93 is electrically connected to the mains system 8, but this practice causes a large amount of electrical energy to be wasted through the resistive load 90 during the burn-in test phase.

Therefore, how to design a wind power generation device that can simulate a wind power generation device and greatly reduce unnecessary power waste during system simulation is a topic worthy of study.

Accordingly, it is an object of the present invention to provide a wind power generation simulation apparatus adapted to receive a utility signal provided by a utility system to simulate a permanent magnet synchronous generator to provide a variable frequency variable voltage signal, comprising: a power generation unit Electrically connecting with the utility system to receive the utility signal, and converting the city electrical signal to a first alternating current signal having a variable frequency variable voltage characteristic, the power generating unit comprising: a first power conversion module having a power supply system Electrically connecting to receive the first end of the utility signal, and a second end, and converting the utility signal into a first direct current signal, wherein the first power conversion module is a single-stage AC-DC converter; And a second substation module having a second end electrically coupled to the second end of the first substation module to receive the second end of the first DC signal, and a first end, and the first DC signal Converting to the first alternating current voltage signal; and an adjusting unit electrically connected to the power generating unit and the mains system to receive the first alternating current signal and convert the first alternating current signal into a a second alternating current signal, and outputting the second alternating current signal to the mains system, the adjusting unit comprising: a third substation module having a first end electrically connected to the generating unit to receive the first alternating current signal And a second end, and converting the first alternating current signal into a second direct current signal; and a fourth power conversion module having a third electrical connection module electrically connected to receive the second direct current signal The first end, and a second end electrically connected to the mains system, and converting the second DC signal into a second alternating current signal and transmitting to the mains system.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

The invention utilizes a mains signal provided by an existing mains system to convert it into a variable frequency alternating current signal, and then simulates a variable frequency piezoelectric signal provided by a permanent magnet synchronous generator of a wind power generation device. No., in turn, a wind power simulation device can be designed to serve as a burning test platform for a wind power generation device.

Referring to FIG. 3, a preferred embodiment of the present invention is adapted to receive a mains signal provided by a mains system to simulate a permanent magnet synchronous generator to provide a variable frequency variable voltage signal, comprising: a power generating unit 1 and a The power unit 1 includes a first power module 11 having a first end 111 and a second end 112, and a second variable having a first end 121 and a second end 122. The electric module 12, the adjusting unit 2 includes a first The third substation module 21 of the end 211 and the second end 212, and the fourth substation module 22 having a first end 221 and a second end 222.

The first end 111 of the first substation module 11 is electrically connected to the mains system 8 , and the second end 112 is electrically connected to the first end 121 of the second substation module 12 . The second substation module The second end 122 of the second sub-module 21 is electrically connected to the first end 211 of the third sub-module 21, and the second end 212 of the third sub-module 21 is the same as the fourth sub-module 22 One end 221 is electrically connected. Finally, the second end 222 of the fourth substation module 22 is electrically connected to the mains system 8.

In this embodiment, the first substation module 11 is implemented by a single-stage AC-to-DC converter, which converts the mains signal into a first DC signal after receiving the mains signal. In this embodiment, the detailed circuit descriptions of the second substation module 12, the third substation module 21, and the fourth substation module 22 are as follows: Referring to FIG. 4, the second substation module 12 is A three-phase converter is realized, which has six switching elements S ₂₁ ~ S ₂₆ , six diodes D ₂₁ ~ D ₂₆ , and each switching element is electrically connected in reverse parallel with its corresponding diode Therefore, the output voltage and the frequency are adjusted by controlling whether the switching element is turned on or off. The input voltage terminal V _{d is} the first end 121 of the second power conversion module 12 for receiving the first transforming module 11 outputs the first DC voltage signal, and the output voltage V _o is the end of the second variable the second end 122 of the module 12, for outputting a first alternating signal having a variable frequency transformer characteristics.

Referring to FIG. 5, the third substation module 21 is implemented by a three-phase power factor corrector having three inductors L ₃₁ ~ L ₃₃ , six switching elements S ₃₁ ~ S ₃₆ , and six diodes The body D ₃₁ ~ D ₃₆ , and an output capacitor C _o , as shown in the figure, each inductor is electrically connected to a corresponding switching element, and then each switching element is electrically connected in an anti-parallel manner with the corresponding diode. The output voltage and frequency are adjusted by controlling whether the switching element is turned on or off. The input voltage terminal V _{AC is} the first end 211 of the third power conversion module 21 for receiving the second power conversion mode. The group 12 outputs the first alternating current signal, and the output voltage terminal V _{DC is} the second end 212 of the third power conversion module 21 for outputting a second direct current signal.

Referring to FIG. 6, the fourth power conversion module 22 is implemented by a single-phase full-bridge converter, which has four switching elements S ₄₁ ~ S ₄₄ and four diodes D ₄₁ ~ D ₄₄ , and Each switching element is electrically connected in an anti-parallel manner to its corresponding diode. Therefore, the output voltage and frequency are adjusted by controlling the conduction of each switching element, wherein the input voltage terminal V _{d is} the fourth The first end 221 of the substation module 22 is configured to receive the second DC signal output by the third substation module 21, and the output voltage terminal V _{o is} the second end of the fourth submodulation module 22 222, for outputting a second alternating current signal.

In other words, the first end 111 of the first substation module 11 of the present invention receives a mains signal supplied by the mains system 8 and converts it into the first direct current signal, and then transmits the same to the second variable. In the electric module 12, the second substation module 12 converts the first direct current signal to the first alternating current signal having the variable frequency variable voltage characteristic, and then transmits the first alternating current signal to the third substation module 21, the first After the first alternating current signal is converted into the second direct current signal, the three power conversion module 21 transmits the first alternating current signal to the fourth power conversion module 22, and the fourth power conversion module 22 converts the second direct current signal For the second exchange telecommunications After the number, it is transmitted back to the utility system 8.

Compared with the prior art, which is an alternating current signal generated by a permanent magnet synchronous generator, the power generating unit 1 of the embodiment is not subjected to a starting torque such as a permanent magnet synchronous generator during the burning test phase. , the motor speed change, the bearing friction and other factors, so it can simulate the generation of a high reliability first AC signal, and after the reliability of the first AC signal is improved, the adjustment unit 2 can perform the simulation test accordingly. The second alternating current signal is generated to generate high reliability and frequency stability, so that the second alternating current signal can be directly transmitted to the mains system 8 to recover the electric energy corresponding to the burning test phase. Therefore, the waste of electric energy caused by the adjustment unit 2 during the burn-in test phase can be effectively reduced. In addition, since the stability of the first alternating current signal provided by the power generating unit 1 is high, the time during which the adjusting unit 2 is in the burn-in test phase can be effectively shortened.

In summary, the preferred embodiments of the present invention use the power generating unit to generate the first AC voltage signal and transmit the signal to the adjusting unit. The cost of the power generating unit is much lower than that of a permanent magnet synchronous generator. Therefore, when constructing a wind power generation device, the wind power generation simulation device according to the present invention can be used to replace a wind turbine and a permanent magnet synchronous generator with the power generation unit, thereby greatly reducing the wind power generation device at the initial stage of design. The design cost of the system simulation, at the same time, using the power generating unit of the present invention to generate a first AC signal with high reliability to perform the burning test on the adjusting unit, thereby reducing unnecessary power waste, and finally, the output of the adjusting unit The two AC signals can also be directly transmitted to the mains system, thereby making The power consumption of the wind power generator during the burn-in test can be recovered via the power system, so that the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

1‧‧‧Power Unit

11‧‧‧First transformer module

111‧‧‧ first end

112‧‧‧ second end

12‧‧‧Second substation module

121‧‧‧ first end

122‧‧‧ second end

2‧‧‧Adjustment unit

21‧‧‧ Third Transformer Module

211‧‧‧ first end

212‧‧‧ second end

22‧‧‧ fourth transformer module

221‧‧‧ first end

222‧‧‧ second end

8‧‧‧Power system

1 is a schematic diagram of a system of a conventional wind power generation device; FIG. 2 is a schematic diagram of a system when the conventional wind power generation device is in a burning test phase; FIG. 3 is a schematic diagram of a system according to a preferred embodiment of the present invention; FIG. 5 is a circuit diagram of a third sub-module module of the preferred embodiment; and FIG. 6 is a circuit diagram of a fourth sub-module module of the preferred embodiment.

1. . . Power generation unit

11. . . First substation module

111. . . First end

112. . . Second end

12. . . Second substation module

121. . . First end

122. . . Second end

2. . . Adjustment unit

twenty one. . . Third substation module

211. . . First end

212. . . Second end

twenty two. . . Fourth transformer module

221. . . First end

222. . . Second end

8. . . Mains system

Claims (4)

A wind power simulation device is adapted to receive a mains signal provided by a mains system to simulate a permanent magnet synchronous generator to provide a variable frequency variable voltage signal, comprising: a power generating unit electrically connected to the mains system to receive the a city electrical signal, and converting the city electrical signal to a first alternating current signal having a variable frequency variable voltage characteristic, the power generating unit comprising: a first power conversion module having a first electrical connection with the mains system to receive the first one of the utility signals And a second end, and converting the city electrical signal into a first direct current signal, wherein the first power conversion module is a single-stage AC-DC converter; and a second power conversion module has Electrically connecting to the second end of the first power-changing module to receive the second end of the first DC signal, and a first end, and converting the first DC signal into the first AC voltage signal; An adjusting unit is electrically connected to the power generating unit and the mains system to receive the first alternating current signal and convert the first alternating current signal into a second alternating current signal, and output the second alternating current signal The electrical signal to the mains system, the adjusting unit includes: a third substation module having a first end electrically connected to the generating unit to receive the first alternating current signal, and a second end Converting an alternating current signal into a second direct current signal; and a fourth power conversion module having a power to the third power conversion module Connecting to receive the first end of the second DC signal, and a second end electrically connected to the mains system, and converting the second DC signal into a second AC signal and transmitting to the utility system. The wind power simulation device according to claim 1, wherein the second substation module is a three-phase converter. The wind power simulation device according to claim 1, wherein the third substation module is a three-phase power factor modifier. The wind power generation simulation device according to claim 1, wherein the fourth substation module is a single phase full bridge converter.