Device and system for calculating maximum power of photovoltaic station

Abstract

The utility model provides a photovoltaic station maximum power calculation device and system, the device comprises an input circuit connected with a scheduling instruction sending end, a decision circuit and a prediction circuit, the decision circuit comprises a high frequency amplifier, an external signal circuit and an LC circuit; the prediction circuit comprises a first input end which is externally connected with the output end of the decision circuit and the photovoltaic station unit and internally connected with the input end of the first arithmetic unit, and a second input end which is externally connected with the photovoltaic station unit and the optical sensor and internally connected with the input end of the second arithmetic unit. And the input end of the first comparison circuit is respectively connected with the output end of the first arithmetic unit and the output end of the second arithmetic unit. According to the utility model, the complete process of calculating the maximum power of the photovoltaic station from receiving a dispatching instruction to executing at the tail end is realized through simple circuit combination, the cost is low, the capabilities of analyzing a simple instruction and realizing automatic processing are realized, and the overall efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field, and in particular to a device and system for calculating the maximum power that can be generated by a photovoltaic station. Background Art

[0002] New energy sources typically utilize clean energy sources such as solar, wind, and tidal energy, transforming them into usable electricity through a series of conversions. These sources are widely used due to their clean and renewable nature. Currently, my country is showing a trend toward the combined power generation of multiple clean energy sources. This complementary generation of multiple clean energy sources can, to a certain extent, mitigate the impact of clean energy fluctuations on the power grid.

[0003] In a clean energy cogeneration system, instructions are typically assigned based on the power generation boundary of each clean energy source. As the installed capacity of individual photovoltaic power stations increases, the accuracy of the power generation boundary (the maximum power a photovoltaic power station can generate) becomes increasingly important. If it is too high, the system's actual power generation will be insufficient, impacting power generation. If it is too low, the power generation of the photovoltaic power station will be low, reducing photovoltaic power consumption. Therefore, determining the accurate maximum power generation of a photovoltaic power station is one of the effective methods for improving photovoltaic consumption and increasing the power generation of clean energy cogeneration systems.

[0004] However, the current equipment for calculating the maximum power that can be generated by photovoltaic stations is not perfect, and the intelligent systems that can be directly applied are complex in structure and high in cost. The configuration of commercially available complete intelligent systems in some local small-scale photovoltaic stations obviously increases unnecessary costs, and the subsequent expenses for system operation are also high, which seriously affects the overall benefits of the photovoltaic stations. Utility Model Content

[0005] In response to the problems existing in the prior art, the utility model provides a photovoltaic station maximum power calculation device with a simple circuit structure, low development cost, and adaptability to maximum power calculation scenarios, which can realize automatic control under simple instruction conditions.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a photovoltaic station maximum power calculation device, comprising an input circuit, a decision circuit and a prediction circuit; the input end of the input circuit is connected to the dispatch instruction issuing end;

[0007] The decision-making circuit includes a high-frequency amplifier, an external signal circuit, and an LC circuit; the input end of the high-frequency amplifier is connected to the output end of the input circuit; the LC circuit includes an inductor and a first capacitor; one end of the inductor is connected to the output end of the high-frequency amplifier, and the other end of the inductor is the output end of the decision circuit; the external signal circuit includes an ANT receiving end and a second capacitor; the ANT receiving end and one end of the second capacitor are respectively connected between the inductor and the output end of the high-frequency amplifier; the other end of the second capacitor is grounded;

[0008] The prediction circuit includes a first input terminal, a second input terminal, a first operator, a second operator and a first comparison circuit; the first input terminal is respectively connected to the output terminal of the decision circuit and the photovoltaic station unit, the first input terminal is internally connected to the input terminal of the first operator, the second input terminal is respectively externally connected to the photovoltaic station unit and the light sensor, and the second input terminal is internally connected to the input terminal of the second operator; the output terminal of the first operator and the output terminal of the second operator are respectively connected to the input terminal of the first comparison circuit.

[0009] Furthermore, the input circuit includes an input module, a first RC circuit and a first operational amplifier;

[0010] The input module includes a first transistor with a grounded source, a gate of the first transistor being an input terminal of the input circuit, and a drain of the first transistor being connected to the first RC circuit;

[0011] The first RC circuit includes a third capacitor and a first resistor, the third capacitor is connected between the output terminal of the input module and the positive input terminal of the first operational amplifier, one end of the first resistor is connected between the third capacitor and the positive input terminal of the first operational amplifier, and the other end of the first resistor is grounded;

[0012] A second resistor is connected between the negative input terminal and the output terminal of the first operational amplifier. The negative input terminal of the first operational amplifier is grounded after passing through a third resistor. The output terminal of the first operational amplifier is the output terminal of the input circuit.

[0013] Furthermore, the number of the first transistors is two.

[0014] Furthermore, the high-frequency amplifier includes a second transistor and a third transistor, the collector of the second transistor is connected to the output end of the input circuit, the emitter of the second transistor is connected to the collector of the third transistor, the emitter of the third transistor is connected to the LC circuit, the base of the second transistor and the base of the third transistor are respectively connected to a DC power supply, and the body of the second transistor and the body of the third transistor are respectively grounded.

[0015] Furthermore, the decision circuit further includes a current amplifier connected between the inductor and an output terminal of the decision circuit.

[0016] Furthermore, the current amplifier includes a fourth transistor, the collector of the fourth transistor is connected between the inductor and the output end of the decision circuit, the emitter and the tube shell of the fourth transistor are grounded respectively, and the base of the fourth transistor is connected to a DC power supply.

[0017] Furthermore, the prediction circuit further includes a second operational amplifier and a third operational amplifier, and the first comparison circuit includes a fourth operational amplifier, a fifth operational amplifier, a sixth operational amplifier and a first comparator;

[0018] The result output terminal of the second operational unit is connected to the positive input terminal of the second operational amplifier, and the negative input terminal of the second operational amplifier is connected to the output terminal of the second operational amplifier;

[0019] The result output terminal of the first operator is connected to the positive input terminal of the third operational amplifier through a third resistor and a fourth resistor in sequence, and the negative input terminal of the third operational amplifier is connected to ground through a fifth resistor;

[0020] The result output terminal of the first operator passes through the third resistor and the sixth resistor in sequence and then intersects with the output terminal of the second operational amplifier at a first connection point;

[0021] The state output terminal of the first operator, the state output terminal of the second operator and the output terminal of the third operational amplifier intersect at a second connection point;

[0022] One end of the seventh resistor and one end of the eleventh resistor are respectively connected to the first connection point; one end of the eighth resistor and one end of the tenth resistor are respectively connected to the second connection point; one end of the ninth resistor is connected to a positive direct current; and one end of the twelfth resistor is connected to a negative direct current.

[0023] The other end of the seventh resistor, the other end of the eighth resistor, and the other end of the ninth resistor are respectively connected to the positive input terminal of the fourth operational amplifier; the other end of the tenth resistor, the other end of the eleventh resistor, and the other end of the twelfth resistor are respectively connected to the negative input terminal of the fifth operational amplifier; the negative input terminal of the fourth operational amplifier is connected to the positive input terminal of the fifth operational amplifier; a thirteenth resistor is connected between the positive input terminal of the fourth operational amplifier and the output terminal of the fourth operational amplifier; and a fourteenth resistor is connected between the negative input terminal of the fifth operational amplifier and the output terminal of the fifth operational amplifier;

[0024] The output terminal of the fourth operational amplifier is connected to the input terminal of the sixth operational amplifier;

[0025] The output of the sixth operational amplifier and the output of the fifth operational amplifier are respectively connected to the input of the first comparator, and the output of the first comparator is the output of the prediction circuit. Further, the prediction circuit also includes a second comparison circuit;

[0026] The second comparison circuit includes a seventh operational amplifier, an eighth operational amplifier, a ninth operational amplifier and a second comparator;

[0027] One end of the sixteenth resistor and one end of the nineteenth resistor are respectively connected to the first connection point; one end of the fifteenth resistor and one end of the eighteenth resistor are respectively connected to the second connection point; one end of the seventeenth resistor is connected to a positive direct current; and one end of the twentieth resistor is connected to a negative direct current.

[0028] The other end of the fifteenth resistor, the other end of the sixteenth resistor, and the other end of the seventeenth resistor are respectively connected to the positive input terminal of the seventh operational amplifier; the other end of the eighteenth resistor, the other end of the nineteenth resistor, and the other end of the twentieth resistor are respectively connected to the negative input terminal of the eighth operational amplifier; the negative input terminal of the seventh operational amplifier is connected to the positive input terminal of the eighth operational amplifier; a twenty-first resistor is connected between the positive input terminal of the seventh operational amplifier and the output terminal of the seventh operational amplifier; and a twenty-second resistor is connected between the negative input terminal of the eighth operational amplifier and the output terminal of the eighth operational amplifier;

[0029] The output terminal of the eighth operational amplifier is connected to the input terminal of the ninth operational amplifier;

[0030] The output end of the ninth operational amplifier and the output end of the seventh operational amplifier are respectively connected to the input end of the second comparator, and the output end of the second comparator is the output end of the prediction circuit.

[0031] A photovoltaic station maximum power calculation system includes a dispatching center, a photovoltaic station unit, an input circuit, a decision circuit, a prediction circuit and a control actuator;

[0032] The output end of the dispatch center is connected to the input end of the input circuit; the dispatch center is used to issue dispatch instructions;

[0033] The decision-making circuit includes a high-frequency amplifier, an external signal circuit, and an LC circuit; the input end of the high-frequency amplifier is connected to the output end of the input circuit; the LC circuit includes an inductor and a first capacitor; one end of the inductor is connected to the output end of the high-frequency amplifier, and the other end of the inductor is the output end of the decision circuit; the external signal circuit includes an ANT receiving end and a second capacitor; the ANT receiving end and one end of the second capacitor are respectively connected between the inductor and the output end of the high-frequency amplifier; the other end of the second capacitor is grounded;

[0034] The prediction circuit includes a first input terminal, a second input terminal, a first operator, a second operator, and a first comparison circuit; the first input terminal is respectively connected to the output terminal of the decision circuit and the photovoltaic station unit, the first input terminal is internally connected to the input terminal of the first operator, the second input terminal is respectively externally connected to the photovoltaic station unit and the light sensor, and the second input terminal is internally connected to the input terminal of the second operator; the output terminal of the first operator and the output terminal of the second operator are respectively connected to the input terminal of the first comparison circuit;

[0035] The output end of the first comparison circuit is connected to the control actuator, and the control execution end of the control actuator is connected to the photovoltaic station unit.

[0036] Furthermore, the prediction circuit further includes a second comparison circuit, the output end of the first operator and the output end of the second operator are respectively connected to the input end of the second comparison circuit, and the output end of the second comparison circuit is connected to the dispatching center.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] The utility model can realize the complete process of calculating the maximum power that can be generated by a photovoltaic station from receiving the dispatch instruction to the terminal execution through a simple circuit combination. It has low cost and has the ability to parse simple instructions and realize automatic processing, thereby improving overall efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural diagram of the utility model;

[0040] Figure 2 This is a schematic diagram of the input circuit in the utility model;

[0041] Figure 3 This is a schematic diagram of the decision-making circuit in the utility model;

[0042] Figure 4 This is a schematic diagram of the prediction circuit in the utility model;

[0043] Among them, the figure markings are: 10, input circuit; 11, input module; 12, first RC circuit; 13, first operational amplifier; 14, first output end; 15, second RC circuit; 16, supercapacitor; 20, decision circuit; 21, high-frequency amplifier; 22, external signal circuit; 23, LC circuit; 24, current amplifier; 30, prediction circuit; 31, first input end; 32, second input end; 33, first operator; 34, second operator; 35, first comparison circuit; 36, second comparison circuit; 37, second operational amplifier; 38, third operational amplifier; 301, first connection point; 302, second connection point. DETAILED DESCRIPTION

[0044] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0045] See also Figure 1-4 A photovoltaic station maximum power calculation device includes an input circuit 10, a decision circuit 20, and a prediction circuit 30; an input end of the input circuit 10 is connected to a dispatch instruction issuing end;

[0046] The input circuit 10 includes an input module 11, a first RC circuit 12 and a first operational amplifier 13;

[0047] The input module 11 includes a first transistor with a grounded source. The gate of the first transistor is the input terminal of the input circuit 10. The drain of the first transistor is connected to the first RC circuit 12 and the voltage source respectively. There are two first transistors. By connecting the two first transistors in parallel, the impedance of the input circuit 10 can be increased. The high input impedance can ensure that the current provided by the input signal source is small, thereby maintaining the stability of the input signal source and reducing the impact on the input signal source. At the same time, the two first transistors connected in parallel can increase the input signal capacity, and can jointly process a larger input signal current, ensuring that the input circuit can process a stronger signal without distortion.

[0048] See also Figure 2 , two first transistors Q1 and Q2, whose sources are grounded, whose gates are respectively connected to the input terminals of the input circuit 10, whose drains are connected to the first RC circuit 12, and whose resistor R2 is connected between the voltage source Vs and the drains;

[0049] The first RC circuit 12 includes a third capacitor C2 and a first resistor R3. The third capacitor C2 is connected between the output terminal of the input module 11 and the positive input terminal of the first operational amplifier 13. One end of the first resistor R3 is connected between the third capacitor C2 and the positive input terminal of the first operational amplifier 13. The other end of the first resistor R3 is grounded.

[0050] A second resistor R4 is connected between the negative input terminal and the output terminal of the first operational amplifier 13 . The negative input terminal of the first operational amplifier 13 is grounded after passing through a third resistor R5 . The output terminal of the first operational amplifier 13 is the output terminal of the input circuit 10 .

[0051] After the scheduling instruction triggers the gate of the first transistor, it is filtered by the first RC circuit and amplified by the first operational amplifier 13 to be converted into a first signal and transmitted to the decision circuit 20;

[0052] Preferably, the input circuit also includes a supercapacitor 16 and a second RC circuit 15. The supercapacitor 16 can smooth voltage fluctuations and provide instantaneous large current. When the input signal changes rapidly, the supercapacitor can quickly release energy. After filtering by the second RC circuit 15, the circuit can maintain stable operation and meet the circuit's fast response and high stability requirements.

[0053] The decision circuit 20 includes a high-frequency amplifier 21, an external signal circuit 22, and an LC circuit 23. The input terminal of the high-frequency amplifier 21 is connected to the output terminal of the input circuit 10, that is, the first output terminal 14. The LC circuit 23 includes an inductor L1 and a first capacitor C1. One end of the inductor L1 is connected to the output terminal of the high-frequency amplifier 21, and the other end of the inductor L1 is the output terminal of the decision circuit 20. The external signal circuit 22 includes an ANT receiving terminal and a second capacitor C ANT , ANT receiving end and the second capacitor C ANT One end is connected between the inductor L1 and the output end of the high-frequency amplifier 21, and the second capacitor C ANT The other end is grounded;

[0054] Because the LC circuit 23 is frequency-sensitive, it can be combined with the high-frequency amplifier 21 to amplify the first signal and implement a decision-making function based on whether the circuit is conductive. When the output impedance of the first signal after passing through the high-frequency amplifier 21 matches the input impedance of the LC circuit 23, the signal can be efficiently transmitted. By adjusting the parameters of the inductor L1 and the first capacitor C1 in the LC circuit 23, the conduction threshold of the decision circuit 20 can be pre-adjusted.

[0055] The high-frequency amplifier 21 includes a second transistor M1 and a third transistor M2. The collector of the second transistor M1 is connected to the output end of the input circuit 10, the emitter of the second transistor M1 is connected to the collector of the third transistor M2, the emitter of the third transistor M2 is connected to the LC circuit 23, the base of the second transistor M1 and the base of the third transistor M2 are respectively connected to the DC power supply Vc, and the body of the second transistor M1 and the body of the third transistor M2 are respectively grounded.

[0056] The ANT receiving end is used to receive external status signals and make decisions based on the external status signals. During actual operation, the decision-making circuit is not allowed to make decisions at all times. The external status signal can be used to control whether the decision-making circuit is effective. For example, when the external status signal becomes a high-frequency signal and is lower than the conduction threshold, the right side of the ANT receiving end cannot be turned on and can only be grounded.

[0057] When a first signal is applied to the collector of the second transistor M1, the second transistor M1 amplifies the first signal based on the bias between its base and emitter. The emitter current of the second transistor M1 flows into the collector of the third transistor M2. The third transistor M2 further amplifies the signal from the second transistor M1 based on its own base-emitter bias, and finally outputs it from the emitter of the third transistor M2.

[0058] The decision circuit 20 further includes a current amplifier 24 connected between the inductor and an output terminal of the decision circuit.

[0059] The current amplifier includes a fourth transistor M3 , a collector of which is connected between the inductor L1 and the output terminal of the decision circuit 20 , an emitter and a housing of the fourth transistor M3 are grounded respectively, and a base of the fourth transistor M3 is connected to a DC power supply.

[0060] The prediction circuit 30 includes a first input terminal 31, a second input terminal 32, a first operator 33, a second operator 34 and a first comparison circuit 35; the first input terminal 31 is connected to the output terminal of the decision circuit 20 and the photovoltaic station unit respectively, the first input terminal 31 is internally connected to the input terminal of the first operator 33, the second input terminal 32 is externally connected to the photovoltaic station unit and the light sensor, and the second input terminal 32 is internally connected to the input terminal of the second operator 34; the output terminal of the first operator 33 and the output terminal of the second operator 34 are respectively connected to the input terminal of the first comparison circuit 35.

[0061] The first operator 33 is configured to receive the output signal from the decision circuit 20, i.e., the signal corresponding to the dispatch instruction and the current state information of the photovoltaic station unit, and generate a second signal, wherein the second signal is a signal corresponding to the maximum power that can be generated by the photovoltaic station calculated based on the dispatch instruction and the current state of the photovoltaic station unit;

[0062] The second operator 34 is used to receive the current state information and illumination information of the photovoltaic station group and generate a third signal. The third signal is a signal corresponding to the predicted value of the maximum power that can be generated by the photovoltaic station at the next moment calculated based on the current state of the photovoltaic station group and the illumination information. This is a prior art and will not be described in detail here.

[0063] After the second signal and the third signal are compared by the first comparison circuit 35, when the corresponding result is that the second signal is not greater than the third signal, that is, the predicted value of the maximum power that can be generated by the photovoltaic station at the next moment is sufficient to execute the scheduling instruction, the control execution unit controls the photovoltaic station unit to execute the scheduling instruction; when the corresponding result is that the second signal is greater than the third signal, that is, the predicted value of the maximum power that can be generated by the photovoltaic station at the next moment is insufficient to execute the scheduling instruction, the photovoltaic station unit does not execute the scheduling instruction.

[0064] Furthermore, the prediction circuit further includes a second operational amplifier 37 and a third operational amplifier 38, and the first comparison circuit 35 includes a fourth operational amplifier U4, a fifth operational amplifier U6, a sixth operational amplifier U5 and a first comparator UIA1;

[0065] The result output terminal of the second operational unit 34 is connected to the positive input terminal of the second operational amplifier 37, and the negative input terminal of the second operational amplifier 37 is connected to the output terminal of the second operational amplifier 37;

[0066] The result output terminal of the first operator 33 is sequentially connected to the third resistor R 36 and the fourth resistor R 42 Then it is connected to the positive input terminal of the third operational amplifier 38, and the negative input terminal of the third operational amplifier 38 is connected to the negative input terminal of the third operational amplifier 38 through the fifth resistor R 46 rear grounding;

[0067] The result output terminal of the first operator 33 is sequentially connected to the third resistor R 36 and the sixth resistor R 32 Then, it intersects with the output terminal of the second operational amplifier 37 at a first connection point 301;

[0068] The state output terminal of the first operator 33, the state output terminal of the second operator 34 and the output terminal of the third operational amplifier 38 intersect at a second connection point 302;

[0069] The seventh resistor R 31 One end and the eleventh resistor R 39 One end of each of the eighth resistor R 33 One end and the tenth resistor R 35 One end of each of the ninth resistor R 34 One end of the resistor R 40 One end of the negative DC current;

[0070] The seventh resistor R 31 The other end of the eighth resistor R 33 The other end and the ninth resistor R 34 The other end is connected to the positive input terminal of the fourth operational amplifier U4, the tenth resistor R 35The other end of the eleventh resistor R 39 The other end and the twelfth resistor R 40 The other end of each of the resistors is connected to the negative input terminal of the fifth operational amplifier U6, the negative input terminal of the fourth operational amplifier U4 is connected to the positive input terminal of the fifth operational amplifier U6; a thirteenth resistor R is connected between the positive input terminal of the fourth operational amplifier U4 and the output terminal of the fourth operational amplifier U4. 30 A fourteenth resistor R is connected between the negative input terminal of the fifth operational amplifier U6 and the output terminal of the fifth operational amplifier U6. 43 ;

[0071] The output terminal of the fourth operational amplifier U4 is connected to the input terminal of the sixth operational amplifier U5;

[0072] The output of the sixth operational amplifier U5 and the output of the fifth operational amplifier U6 are respectively connected to the input of the first comparator UIA1. The output of the first comparator UIA1 serves as the output of the prediction circuit 30. When the first comparator UIA1 outputs a high level, the PV station unit can be controlled by the actuator to execute the dispatch instruction. When the first comparator UIA1 outputs a low level, the PV station unit does not execute the dispatch instruction.

[0073] Furthermore, the prediction circuit 30 further includes a second comparison circuit 36;

[0074] The second comparison circuit 36 ​​includes a seventh operational amplifier U7, an eighth operational amplifier U8, a ninth operational amplifier U9 and a second comparator UIA2;

[0075] The sixteenth resistor R 50 One end and the nineteenth resistor R 56 One end of each of the fifteenth resistor R 48 One end and the eighteenth resistor R 54 One end of each of the seventeenth resistor R 52 One end of the resistor R 59 One end of the negative DC current;

[0076] The fifteenth resistor R 48 The other end of the sixteenth resistor R 50 The other end and the seventeenth resistor R 52 The other end is connected to the positive input terminal of the seventh operational amplifier U7, the eighteenth resistor R 54 The other end of the nineteenth resistor R 56 The other end of the 20th resistor R 59The other end of each of the resistors is connected to the negative input terminal of the eighth operational amplifier U8, the negative input terminal of the seventh operational amplifier U7 is connected to the positive input terminal of the eighth operational amplifier U8; a twenty-first resistor R is connected between the positive input terminal of the seventh operational amplifier U7 and the output terminal of the seventh operational amplifier U7. 47 A twenty-second resistor R is connected between the negative input terminal of the eighth operational amplifier U8 and the output terminal of the eighth operational amplifier U8. 62 ;

[0077] The output terminal of the eighth operational amplifier U8 is connected to the input terminal of the ninth operational amplifier U9;

[0078] The output terminal of the ninth operational amplifier U9 and the output terminal of the seventh operational amplifier U7 are respectively connected to the input terminal of the second comparator UIA2 . The output terminal of the second comparator UIA2 is the output terminal of the prediction circuit 30 .

[0079] When the second comparator UIA2 outputs a high level, a re-planning scheme is triggered, that is, the predicted value of the maximum power that can be generated by the photovoltaic station at the next moment is not enough to execute the scheduling instruction, and the scheme needs to be re-planned. Usually, the re-planning scheme can be carried out by increasing the power to the maximum power that can be generated, communicating with the scheduling center, reducing the scheduling instructions, etc.

[0080] A photovoltaic station maximum power calculation system includes a dispatching center, a photovoltaic station unit, an input circuit 10, a decision circuit 20, a prediction circuit 30 and a control actuator;

[0081] The output end of the dispatch center is connected to the input end of the input circuit 10; the dispatch center is used to issue dispatch instructions;

[0082] The decision circuit 20 includes a high-frequency amplifier 21, an external signal circuit 22, and an LC circuit 23. The input terminal of the high-frequency amplifier 21 is connected to the output terminal of the input circuit 10, that is, the first output terminal 14. The LC circuit 23 includes an inductor L1 and a first capacitor C1. One end of the inductor L1 is connected to the output terminal of the high-frequency amplifier 21, and the other end of the inductor L1 is the output terminal of the decision circuit 20. The external signal circuit 22 includes an ANT receiving terminal and a second capacitor C ANT , ANT receiving end and the second capacitor C ANT One end is connected between the inductor L1 and the output end of the high-frequency amplifier 21, and the second capacitor C ANT The other end is grounded;

[0083] The prediction circuit 30 includes a first input terminal 31, a second input terminal 32, a first operator 33, a second operator 34, and a first comparison circuit 35; the first input terminal 31 is connected to the output terminal of the decision circuit 20 and the photovoltaic station unit respectively, the first input terminal 31 is internally connected to the input terminal of the first operator 33, the second input terminal 32 is externally connected to the photovoltaic station unit and the light sensor respectively, and the second input terminal 32 is internally connected to the input terminal of the second operator 34; the output terminal of the first operator 33 and the output terminal of the second operator 34 are respectively connected to the input terminal of the first comparison circuit 35;

[0084] The output end of the first comparison circuit 35 is connected to the control actuator, and the control execution end of the control actuator is connected to the photovoltaic station unit.

[0085] Furthermore, the prediction circuit 30 further includes a second comparison circuit 36 ​​, the output of the first operator 33 and the output of the second operator 34 are respectively connected to the input of the second comparison circuit 36 ​​, and the output of the second comparison circuit 36 ​​is connected to the dispatching center.

[0086] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Simple modifications or equivalent replacements of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A device for calculating the maximum power that can be generated by a photovoltaic station, characterized by: It includes an input circuit, a decision circuit and a prediction circuit; the input end of the input circuit is connected to the scheduling instruction issuing end; The decision-making circuit includes a high-frequency amplifier, an external signal circuit, and an LC circuit; the input end of the high-frequency amplifier is connected to the output end of the input circuit; the LC circuit includes an inductor and a first capacitor; one end of the inductor is connected to the output end of the high-frequency amplifier, and the other end of the inductor is the output end of the decision circuit; the external signal circuit includes an ANT receiving end and a second capacitor; the ANT receiving end and one end of the second capacitor are respectively connected between the inductor and the output end of the high-frequency amplifier; the other end of the second capacitor is grounded; The prediction circuit includes a first input terminal, a second input terminal, a first operator, a second operator and a first comparison circuit; the first input terminal is respectively connected to the output terminal of the decision circuit and the photovoltaic station unit, the first input terminal is internally connected to the input terminal of the first operator, the second input terminal is respectively externally connected to the photovoltaic station unit and the light sensor, and the second input terminal is internally connected to the input terminal of the second operator; the output terminal of the first operator and the output terminal of the second operator are respectively connected to the input terminal of the first comparison circuit.

2. The photovoltaic station maximum power calculation device according to claim 1, characterized in that: The input circuit includes an input module, a first RC circuit and a first operational amplifier; The input module includes a first transistor with a grounded source, a gate of the first transistor being an input terminal of the input circuit, and a drain of the first transistor being connected to the first RC circuit and a voltage source; The first RC circuit includes a third capacitor and a first resistor, the third capacitor is connected between the output terminal of the input module and the positive input terminal of the first operational amplifier, one end of the first resistor is connected between the third capacitor and the positive input terminal of the first operational amplifier, and the other end of the first resistor is grounded; A second resistor is connected between the negative input terminal and the output terminal of the first operational amplifier. The negative input terminal of the first operational amplifier is grounded after passing through a third resistor. The output terminal of the first operational amplifier is the output terminal of the input circuit.

3. The photovoltaic station maximum power calculation device according to claim 2, characterized in that: The number of the first transistors is two.

4. The photovoltaic station maximum power calculation device according to claim 1, characterized in that: The high-frequency amplifier includes a second transistor and a third transistor, the collector of the second transistor is connected to the output end of the input circuit, the emitter of the second transistor is connected to the collector of the third transistor, the emitter of the third transistor is connected to the LC circuit, the base of the second transistor and the base of the third transistor are respectively connected to a DC power supply, and the body of the second transistor and the body of the third transistor are respectively grounded.

5. The photovoltaic station maximum power calculation device according to claim 4, characterized in that: The decision circuit further includes a current amplifier connected between the inductor and an output terminal of the decision circuit.

6. The photovoltaic station maximum power calculation device according to claim 5, characterized in that: The current amplifier includes a fourth transistor, the collector of the fourth transistor is connected between the inductor and the output end of the decision circuit, the emitter and the tube shell of the fourth transistor are grounded respectively, and the base of the fourth transistor is connected to a DC power supply.

7. The photovoltaic station maximum power calculation device according to claim 1, characterized in that: The prediction circuit further includes a second operational amplifier and a third operational amplifier, and the first comparison circuit includes a fourth operational amplifier, a fifth operational amplifier, a sixth operational amplifier and a first comparator; The result output terminal of the second operational unit is connected to the positive input terminal of the second operational amplifier, and the negative input terminal of the second operational amplifier is connected to the output terminal of the second operational amplifier; The result output terminal of the first operator is connected to the positive input terminal of the third operational amplifier through a third resistor and a fourth resistor in sequence, and the negative input terminal of the third operational amplifier is connected to ground through a fifth resistor; The result output terminal of the first operator passes through the third resistor and the sixth resistor in sequence and then intersects with the output terminal of the second operational amplifier at a first connection point; The state output terminal of the first operator, the state output terminal of the second operator and the output terminal of the third operational amplifier intersect at a second connection point; One end of the seventh resistor and one end of the eleventh resistor are respectively connected to the first connection point; one end of the eighth resistor and one end of the tenth resistor are respectively connected to the second connection point; one end of the ninth resistor is connected to a positive direct current; and one end of the twelfth resistor is connected to a negative direct current. The other end of the seventh resistor, the other end of the eighth resistor, and the other end of the ninth resistor are respectively connected to the positive input terminal of the fourth operational amplifier; the other end of the tenth resistor, the other end of the eleventh resistor, and the other end of the twelfth resistor are respectively connected to the negative input terminal of the fifth operational amplifier; the negative input terminal of the fourth operational amplifier is connected to the positive input terminal of the fifth operational amplifier; a thirteenth resistor is connected between the positive input terminal of the fourth operational amplifier and the output terminal of the fourth operational amplifier; and a fourteenth resistor is connected between the negative input terminal of the fifth operational amplifier and the output terminal of the fifth operational amplifier; The output terminal of the fourth operational amplifier is connected to the input terminal of the sixth operational amplifier; The output end of the sixth operational amplifier and the output end of the fifth operational amplifier are respectively connected to the input end of the first comparator, and the output end of the first comparator is the output end of the prediction circuit.

8. The photovoltaic station maximum power calculation device according to claim 7, characterized in that: The prediction circuit further includes a second comparison circuit; The second comparison circuit includes a seventh operational amplifier, an eighth operational amplifier, a ninth operational amplifier and a second comparator; One end of the sixteenth resistor and one end of the nineteenth resistor are respectively connected to the first connection point; one end of the fifteenth resistor and one end of the eighteenth resistor are respectively connected to the second connection point; one end of the seventeenth resistor is connected to a positive direct current; and one end of the twentieth resistor is connected to a negative direct current. The other end of the fifteenth resistor, the other end of the sixteenth resistor, and the other end of the seventeenth resistor are respectively connected to the positive input terminal of the seventh operational amplifier; the other end of the eighteenth resistor, the other end of the nineteenth resistor, and the other end of the twentieth resistor are respectively connected to the negative input terminal of the eighth operational amplifier; the negative input terminal of the seventh operational amplifier is connected to the positive input terminal of the eighth operational amplifier; a twenty-first resistor is connected between the positive input terminal of the seventh operational amplifier and the output terminal of the seventh operational amplifier; and a twenty-second resistor is connected between the negative input terminal of the eighth operational amplifier and the output terminal of the eighth operational amplifier; The output terminal of the eighth operational amplifier is connected to the input terminal of the ninth operational amplifier; The output end of the ninth operational amplifier and the output end of the seventh operational amplifier are respectively connected to the input end of the second comparator, and the output end of the second comparator is the output end of the prediction circuit.

9. A photovoltaic station maximum power calculation system, characterized by: It includes a dispatching center, photovoltaic station units, input circuits, decision circuits, prediction circuits and control actuators; The output end of the dispatch center is connected to the input end of the input circuit; the dispatch center is used to issue dispatch instructions; The decision-making circuit includes a high-frequency amplifier, an external signal circuit, and an LC circuit; the input end of the high-frequency amplifier is connected to the output end of the input circuit; the LC circuit includes an inductor and a first capacitor; one end of the inductor is connected to the output end of the high-frequency amplifier, and the other end of the inductor is the output end of the decision circuit; the external signal circuit includes an ANT receiving end and a second capacitor; the ANT receiving end and one end of the second capacitor are respectively connected between the inductor and the output end of the high-frequency amplifier; the other end of the second capacitor is grounded; The prediction circuit includes a first input terminal, a second input terminal, a first operator, a second operator, and a first comparison circuit; the first input terminal is respectively connected to the output terminal of the decision circuit and the photovoltaic station unit, the first input terminal is internally connected to the input terminal of the first operator, the second input terminal is respectively externally connected to the photovoltaic station unit and the light sensor, and the second input terminal is internally connected to the input terminal of the second operator; the output terminal of the first operator and the output terminal of the second operator are respectively connected to the input terminal of the first comparison circuit; The output end of the first comparison circuit is connected to the control actuator, and the control execution end of the control actuator is connected to the photovoltaic station unit.

10. The photovoltaic station maximum power calculation system according to claim 9, characterized in that: The prediction circuit further includes a second comparison circuit, the output end of the first operator and the output end of the second operator are respectively connected to the input end of the second comparison circuit, and the output end of the second comparison circuit is connected to the dispatching center.

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