TWI582563B - Wind turbine control device and control method thereof - Google Patents

Description

Fan control device and control method thereof

The invention relates to a control device and a control method thereof, in particular to a fan control device for tracking the maximum power of an extraction fan, and fuzzy control voltage conversion and controlling battery unit charging in a two-stage manner and a control method thereof.

The current maximum power tracking of the fan is to use the speed of the fan as feedback, which is costly because of the cost of one more wind speed sensor, and the extracted power is stored in the secondary battery, and then A controller is used to make a power adjustment, otherwise it will burn the load accidentally.

In addition, continuous circuits are used to execute the above two controllers. However, the continuous circuit is bulky, expensive, and difficult to repair. In the event of a program change, it is uneconomical to reassemble a new continuous circuit.

In view of the above-mentioned problems, an object of the present invention is to provide a fan control device and a control method thereof for solving the problems faced by the prior art.

Based on the above object, the present invention provides a fan control device including a maximum power tracking module, a fuzzy control module, and a charging control module. The maximum power tracking module outputs the maximum power duty cycle to the rising DC voltage conversion module according to the power difference of the fan and the duty cycle difference, and the rising type The DC voltage conversion module outputs a maximum power voltage to a step-down DC voltage conversion module. The fuzzy control module outputs a fuzzy control duty cycle to the ascending DC voltage conversion module according to the voltage error of the falling voltage outputted by the reference voltage and the step-up DC voltage conversion module. When the voltage drop is lower than the first preset value, the charging control module causes the step-down DC voltage conversion module to charge the battery unit at a constant current, and when the voltage rise is not less than the first preset value, the down control type is The DC voltage conversion module charges the battery unit with a constant voltage. When the voltage drop is equal to the second preset value, the shutdown signal is transmitted to the relay unit of the down-type DC voltage conversion module and the battery unit.

Preferably, the fuzzy control module can generate a voltage error responsibility cycle according to the voltage error difference, and output a fuzzy control responsibility cycle according to the voltage error responsibility cycle.

Preferably, the fuzzy control responsibility period can be a wave width modulated pulse signal.

Preferably, the fuzzy control responsibility period may be from 0 to 0.8.

Preferably, the charging control module can include a charging controller and a multiplexer, and the charging controller transmits the selection signal to the multiplexer, and the multiplexer provides the voltage drop or the battery voltage, the voltage drop or the battery voltage and the corresponding The voltage reference is generated by a reference voltage provided by the charge controller.

Based on the above object, the present invention further provides a fan control method, which is applicable to a fan control device. The fan control device includes a maximum power tracking module, a fuzzy control module, and a charging control module. The fan control method includes the following steps: according to the power difference of the fan And the duty cycle difference output maximum power duty cycle to the rising DC voltage conversion module, and the rising DC voltage conversion module outputs the maximum power voltage to the ascending DC voltage conversion module. According to the reference voltage and the voltage error of the falling voltage outputted by the step-up DC voltage conversion module, the fuzzy control duty cycle is output to the step-down DC voltage conversion module. The first preset value and the second preset value are provided, and the first preset value and the second preset value are respectively compared with the rising voltage. Wherein, when the voltage drop is less than the first preset value, the step-down DC voltage conversion module is paired The battery unit is charged at a constant current, and when the voltage rise is not less than the first preset value, the step-down DC voltage conversion module charges the battery unit with a constant voltage, and when the voltage is equal to the second preset value, The relay unit is tripped.

Preferably, before outputting the fuzzy control responsibility period, the fan control method may further comprise the following steps: generating a voltage error responsibility period according to the voltage error difference of the two voltage errors. The fuzzy control responsibility cycle is output according to the voltage error duty cycle.

Preferably, the charging control module can include a charging controller and a multiplexer. Before generating the voltage error, the fan control method further includes the following steps: providing a voltage drop or a battery voltage according to the selection signal. A reference voltage corresponding to the voltage drop or battery voltage is provided. Compare the voltage with the reference voltage, or compare the battery voltage with the reference voltage to generate a voltage error.

As described above, the fan control device and the control method thereof of the present invention can track the maximum power of the fan by the maximum power tracking module, control the voltage conversion by the fuzzy control module, and the second stage of the charging control module. Controls the charging of the battery unit, which in turn has the effect of extracting the maximum power of the fan and controlling the charging output.

100‧‧‧Fan control unit

101‧‧‧ fan

102‧‧‧Bridge rectifier

103‧‧‧Rising DC voltage conversion module

104‧‧‧Descent DC voltage conversion module

105‧‧‧ battery unit

106‧‧‧ Relay unit

110‧‧‧Max Power Tracking Module

120‧‧‧Fuzzy Control Module

121‧‧‧ Wave width modulation pulse generator

130‧‧‧Charging control module

131‧‧‧Charging controller

132‧‧‧Multiplexer

Steps S51 to S54, S61 to S62, S71 to S73‧‧

Figure 1 is a first schematic view of the fan control device of the present invention.

Figure 2 is a diagram showing the relationship between the fan output power and the duty cycle of the fan control device of the present invention.

Figure 3 is a second schematic view of the fan control device of the present invention.

Figure 4 is a third schematic view of the fan control device of the present invention.

Figure 5 is a first flow chart of the fan control method of the present invention.

Figure 6 is a second flow chart of the fan control method of the present invention.

Figure 7 is a third flow chart of the fan control method of the present invention.

The features, contents, and advantages of the present invention, as well as the advantages thereof, will be understood by the present invention. The present invention will be described in detail with reference to the accompanying drawings. The use of the present invention is not intended to be a limitation of the scope of the present invention, and the scope of the present invention is not limited by the scope and configuration of the accompanying drawings.

The advantages and features of the present invention, as well as the technical methods of the present invention, are described in more detail with reference to the exemplary embodiments and the accompanying drawings, and the present invention may be implemented in various forms and should not be construed as limited thereby. The embodiments of the present invention, and the embodiments of the present invention are intended to provide a more complete and complete and complete disclosure of the scope of the present invention, and The scope of the patent application is defined.

Please refer to FIG. 1 , which is a first schematic view of the fan control device of the present invention. As shown, the fan control device 100 of the present invention includes a maximum power tracking module 110, a fuzzy control module 120, and a charging control module 130. The fan control device 100 of the present invention may be a Field Programmable Gate Array (FPGA) chip controller.

In other words, the maximum power tracking module 110 calculates the maximum power duty cycle according to the power difference and the duty cycle difference of the fan 101, and outputs the maximum power duty cycle to the rising DC voltage conversion module 103, the rising DC voltage conversion mode. The group 103 then outputs the maximum power voltage to the step-up DC voltage conversion module 104 according to the output maximum power duty cycle; wherein the output of the fan 101 is first rectified and output via the bridge rectifier 102.

The fuzzy control module 120 calculates the fuzzy control responsibility period according to the voltage error of the falling voltage of the reference voltage and the rising-down DC voltage conversion module 104, and outputs the fuzzy control. The duty cycle is to the step-up DC voltage conversion module 104. The fuzzy control module 120 includes an analog to digital converter to convert the analog signal into a digital signal for processing by the fuzzy control module 120.

The charging control module 130, when the falling voltage of the rising-type DC voltage conversion module 104 for charging the battery unit 105 is less than the first preset value, causes the falling-type DC voltage conversion module 104 to be connected to the battery. The unit 105 is configured to charge in the current charging mode. When the voltage is not less than the first preset value, the step-up DC voltage conversion module 104 charges the battery unit 105 in a voltage charging mode, and the voltage is equal to the voltage. When the preset value is two, the jump signal is transmitted between the descending DC voltage conversion module 104 and the battery unit 105, and the descending DC voltage conversion module 104 and the relay unit 106 of the battery unit 105 are respectively connected. (shown in FIG. 4), so that the relay unit 106 jumps according to the trip signal, so that the down-type DC voltage conversion module 104 cannot charge the battery unit 105. The battery unit 105 can be a battery or other rechargeable battery.

Please refer to FIG. 2, which is a diagram showing the relationship between the output power of the fan and the duty cycle of the fan control device of the present invention. As shown in the figure, there are five cases between the fan output power (P _w ) and the duty cycle (D); however, the present invention analyzes the various situations between the output power and the duty cycle in Figure 2, And find out the control strategy to reach the maximum fair rate; first, let the duty cycle D _{k of the} input rising DC voltage conversion module 103 be as follows: D _k = STD + D _k-1

In addition, the present invention provides a Maximum Power Point Tracking (MPPT) algorithm for inputting a duty cycle difference (ΔD) and a power difference (ΔP _w ), and outputting an STD, MPPT algorithm as shown below. :STD=MPPT(△D, △P _w )

Where △D=D _k -D _k-1

△P _w =P _k -P _k-1

Referring to Figure 2, the maximum power tracking operation method of this MPPT algorithm needs to be analyzed by various conditions encountered by the fan to extract the maximum power, which will be explained in the following paragraph.

Case 1: When the power drops and the duty cycle rises (ΔP _w <-0.01, ΔD>0), in order to make the point of maximum power appear on the top of the wave, it is necessary to push the current duty cycle D _k to the left. Therefore, it is necessary to use a duty cycle D _k-1 (because the power is going down on the right side of the wave top) plus a negative value, so that the current duty cycle is pushed to the left, and relatively, the power will go along. Push to the left to achieve the purpose of letting the power appear on top of the wave; instead, the MPPT algorithm is designed with the above concept, for case 1, if (△P _w <-0.01, △D>0), then STD = -0.02.

The same is true, and the STD corresponding to each situation can be obtained as follows:

Case 2: If (-0.01 < ΔP _w <0.01,), STD=0.

Case 3: If (ΔP _w <-0.01, ΔD < 0), STD = 0.02.

Case 4: If (ΔP _w >0.01, ΔD>0), STD=0.01.

Case 5: If (ΔP _w > 0.01, ΔD < 0), STD = -0.01.

Please refer to FIG. 3, which is a second schematic diagram of the fan control device of the present invention. As shown, the fuzzy control module 120 can generate a voltage error duty cycle based on the voltage error difference.

In more detail, the fuzzy control module 120 obtains the voltage error difference (Δe) from the two voltage errors (e _k , e _k-1 ), and the calculation process is as follows: Δe=e _k -e _k-1

Then, the fuzzy control module 120 calculates the fuzzy control responsibility period (D _k ) according to the voltage error duty cycle (Du _k ) and the previous fuzzy control duty cycle (D _k-1 ), and outputs the fuzzy control responsibility period (D _k ), the calculation process is as follows: D _k = D _k-1 + Du _k

Among them, the fuzzy control responsibility period (D _k ) has a saturation limit as follows: 0<D _k <0.8

Further, the fuzzy control duty cycle can be converted into a wave width modulated pulse wave signal via the wave width modulated pulse wave generator 121.

In other words, the fuzzy control module 120 is processed in the sliding mode by the fuzzy rule base, and the required output voltage setting has been completed, and the fuzzy rule base is as shown in Table 1 below:

Referring to FIG. 4, which is a preferred embodiment of the present invention, the charging control module 130 can include a charging controller 131 and a multiplexer 132. The charging controller 131 transmits a selection signal to the multiplexer 132. The multiplexer 132 The voltage error is generated by providing a voltage drop (Vo) or a battery voltage (Vc), a voltage drop (Vo) or a battery voltage (Vc) and a corresponding reference voltage (Vr) supplied from the charge controller 131.

To be continued, the above charging control function program is as follows: [out, sel, Ry] = charge (Vo)

If Vo<12; (12 is only an example, which can be adjusted according to the different settings of the battery unit)

Then out=1;sel=1;//Constant current charging

Else

Out=12.5;sel=0;//Constant voltage charging (12.5 is only an example, which can be adjusted according to the different settings of the battery unit)

End

If Vo=12.5; (12.5 is only an example, which can be adjusted according to the different settings of the battery unit)

Ry = 0; / / relay switch trip

Else

Ry=1; / relay switch closed

End

As described above, when the first preset value is 12, if the voltage drop (Vo) is less than 12, the charge controller 131 gives the multiplexer 132 a selection signal of 1 (sel = 1), and the multiplexer 132 The battery voltage (Vc) is provided, and out=1 indicates that the charge controller 131 provides a reference voltage (Vr) of 1, so that the current voltage error (e) is 1-Vc.

On the other hand, if the voltage drop (Vo) is greater than 12, the selection signal of the charge controller 131 to the multiplexer 132 is 0 (sel=0), and the multiplexer 132 provides the voltage drop (Vo), and out=12.5. It is indicated that the charge controller 131 provides a reference voltage (Vr) of 12.5, so that the current voltage error (e) is 12.5-Vo.

However, when the second preset value is 12.5, if the voltage drop (Vo) is equal to 12.5, it means that the battery unit 105 is fully charged, so the charging controller 131 transmits the trip signal to the relay unit 106 to cause it to trip. (Ry=0), and the stop-down DC voltage conversion module 104 charges the battery unit 105; otherwise, it indicates that the battery unit 105 is not fully charged, so the relay unit 106 continues to be closed (Ry=1), so that The down-type DC voltage conversion module 104 charges the battery unit 105.

Although the foregoing concept of the fan control method of the present invention has been described in the foregoing description of the fan control apparatus of the present invention, for the sake of clarity, the flowchart will be described in detail below.

Please refer to FIG. 5, which is a first flow chart of the fan control method of the present invention. As shown in the figure, the fan control method of the present invention is applicable to the above-mentioned fan control device 100. The fan control device includes a maximum power tracking module, a fuzzy control module and a charging control module. The fan control method comprises the following steps:

In step S51, according to the power difference of the fan and the duty cycle difference, the maximum power duty cycle is outputted to the rising DC voltage conversion module, and the rising DC voltage conversion module outputs the maximum power voltage to the step-down DC voltage conversion module.

In step S52, the fuzzy control duty cycle is output to the step-down DC voltage conversion module according to the voltage error of the falling voltage outputted by the reference voltage and the rising-down DC voltage conversion module.

In step S53, a first preset value and a second preset value are provided, and the first preset value and the second preset value are respectively compared with the rising voltage.

In step S54, wherein, when the voltage is lower than the first preset value, the step-up DC voltage conversion module charges the battery unit with a constant current, and when the voltage is not less than the first preset value, The step-down DC voltage conversion module charges the battery unit with a constant voltage, and when the voltage is equal to the second preset value, the relay unit is tripped.

Please refer to FIG. 6, which is a second flow chart of the fan control method of the present invention. As shown in the figure, before outputting the fuzzy control responsibility cycle, the fan control method may further include the following steps:

In step S61: a voltage error duty cycle is generated according to the voltage error difference of the two voltage errors.

In step S62: the fuzzy control responsibility period is output according to the voltage error responsibility period.

Please refer to FIG. 7 , which is a third flowchart of the fan control method of the present invention. As shown in the figure, the charging control module can include a charging controller and a multiplexer. Before generating a voltage error, the fan control method can further include the following steps:

In step S71, a voltage drop or a battery voltage is provided according to the selection signal.

In step S72: a reference voltage corresponding to the voltage drop or the battery voltage is provided.

In step S73, the voltage is compared with the reference voltage, or the battery voltage and the reference voltage are compared to generate a voltage error.

As described above, the fan control device and the control method thereof of the present invention can track the maximum power of the fan by the maximum power tracking module, control the voltage conversion by the fuzzy control module, and the second stage of the charging control module. Controls the charging of the battery unit, which in turn has the effect of extracting the maximum power of the fan and controlling the charging output.

The embodiments described above are merely illustrative of the technical spirit and the features of the present invention, and the objects of the present invention can be understood by those skilled in the art, and the scope of the present invention cannot be limited thereto. That is, the equivalent variations or modifications made by the spirit of the present invention should still be included in the scope of the present invention.

100‧‧‧Fan control unit

101‧‧‧ fan

102‧‧‧Bridge rectifier

103‧‧‧Rising DC voltage conversion module

104‧‧‧Descent DC voltage conversion module

105‧‧‧ battery unit

110‧‧‧Max Power Tracking Module

120‧‧‧Fuzzy Control Module

130‧‧‧Charging control module

Claims (10)

A fan control device comprises: a maximum power tracking module, which outputs a maximum power duty cycle to a rising DC voltage conversion module according to a power difference of a fan and a duty cycle difference, the rising DC voltage conversion The module outputs a maximum power voltage to a down-type DC voltage conversion module; a fuzzy control module is based on a reference voltage and a voltage of one of the falling voltages of the falling-type DC voltage conversion module The error output-fuzzy control responsibility cycle to the down-regulated DC voltage conversion module; and a charging control module, when the rising voltage is less than a first preset value, the falling-type DC voltage conversion module is paired A battery unit is charged at a constant current, and when the voltage is not lower than the first preset value, the step-up DC voltage conversion module charges the battery unit with a constant voltage, and the voltage is equal to a second When the preset value is received, a jump signal is transmitted to respectively connect the down-type DC voltage conversion module and one of the battery unit relay units, so that the down-type DC voltage conversion module is stopped. Charging the battery cell. The fan control device of claim 1, wherein the fuzzy control module generates a voltage error responsibility cycle according to a voltage error difference, and outputs the fuzzy control responsibility cycle according to the voltage error responsibility cycle. The fan control device according to claim 1, wherein the fuzzy control responsibility period is a wave width modulated pulse wave signal. The fan control device according to claim 1, wherein the fuzzy control responsibility period is 0 to 0.8. The fan control device according to claim 1, wherein the charging control The module includes a charge controller and a multiplexer, and the charge controller transmits a selection signal to the multiplexer, the multiplexer is configured to provide the voltage drop or a battery voltage, the voltage drop Or the battery voltage system and the corresponding reference voltage provided by the charge controller generate the voltage error. A fan control method is applicable to a fan control device, wherein the fan control device comprises a maximum power tracking module, a fuzzy control module and a charging control module, and the fan control method comprises the following steps: one of the fans Power difference and a duty cycle difference output a maximum power duty cycle to a rising DC voltage conversion module, the rising DC voltage conversion module outputs a maximum power voltage to a down-type DC voltage conversion module; And a reference voltage and a voltage error of one of the falling voltages of the output of the step-up DC voltage conversion module output a fuzzy control duty cycle to the down-type DC voltage conversion module; and provide a first preset value and a a second preset value, wherein the first preset value and the second preset value are respectively compared with the falling voltage; wherein, when the falling voltage is less than the first preset value, the falling The ascending DC voltage conversion module charges a battery unit with a constant current, and when the voltage is not less than the first preset value, the down-type DC voltage conversion module is configured to When the constant voltage charging unit, the drop in voltage is equal to the second predetermined lift value, the relay means a jump, so that the down-conversion module liter DC voltage to stop charging the battery cells. The fan control method according to claim 6, wherein the fan control method further comprises the following steps before outputting the fuzzy control responsibility cycle: And generating a voltage error responsibility period according to a voltage error difference of the voltage error; and outputting the fuzzy control responsibility period according to the voltage error duty cycle. The fan control method of claim 6, wherein the charging control module comprises a charging controller and a multiplexer, and before the generating the voltage error, the fan control method further comprises the following steps: Selecting a signal to provide the voltage drop or a battery voltage; providing the reference voltage corresponding to the voltage drop or the battery voltage; and comparing the voltage drop to the reference voltage, or to the battery voltage and the reference voltage, To produce this voltage error. The fan control method according to claim 6, wherein the fuzzy control responsibility period is a wave width modulated pulse signal. The fan control method according to claim 6, wherein the fuzzy control responsibility period is 0 to 0.8.