A test device and test method for primary frequency regulation of photovoltaic power station

Abstract

The present invention discloses a test device and test method for primary frequency modulation of a photovoltaic power station, comprising a body assembly, the body assembly including a central console, a power system simulator, an inverter, a touch screen, and a high-frequency signal receiver; and a test mechanism, the test mechanism including an inverter frequency detector. The present invention receives the inverter frequency, grid frequency, and load data of the photovoltaic power station in real time via the high-frequency signal receiver, then performs an on-site simulation based on the received data via the power system simulator, the load interference simulator, and the inverter. A data processor calculates the frequency modulation PID parameters and the artificial dead zone range value, and then a central controller determines whether to perform a primary frequency modulation action. When primary frequency modulation is required, a primary frequency modulation test is performed via a speed regulator. Thus, the primary frequency modulation system can be tested based on real-time on-site data, improving data accuracy and avoiding deviations in test results.

Description

Technical field:

[0001] The present invention relates to the technical field of photovoltaic power stations, and in particular to a test device and a test method for primary frequency modulation of a photovoltaic power station. Background technology:

[0002] A photovoltaic power station is a power generation system that utilizes solar energy and uses special materials such as crystalline silicon panels, inverters, and other electronic components. It is connected to the power grid and transmits electricity to the grid. It can be divided into independent power generation systems with batteries and grid-connected power generation systems without batteries. Solar power generation is divided into solar thermal power generation and photovoltaic power generation. Primary frequency regulation refers to the automatic control process in which the control system of the units in the grid automatically controls the increase or decrease of the active power of the units once the grid frequency deviates from the rated value, limiting the fluctuation of the grid frequency and maintaining the grid frequency stable.

[0003] When testing the primary frequency regulation system of a traditional photovoltaic power station, the test and demonstration are usually carried out on a computer using a modeling method. Since the test data and parameters are all historical data or ideal data of the photovoltaic power station, it is impossible to test the primary frequency regulation system based on real-time data on site, which leads to deviations in the test results. Therefore, a test device and test method for the primary frequency regulation of a photovoltaic power station are proposed. Summary of the invention:

[0004] The object of the present invention is to provide a test device and a test method for primary frequency modulation of a photovoltaic power station, so as to solve one of the problems raised in the above background technology.

[0005] The present invention is implemented by the following technical solution: a test device for primary frequency modulation of photovoltaic power station, comprising

[0006] A body assembly, comprising a central console, a power system simulator, an inverter, a touch screen, and a high-frequency signal receiver;

[0007] A test mechanism, comprising an inverter frequency detector, a grid frequency detector, a load disturbance simulator, a speed regulator, a data processor, a data simulator, a data converter, and a central controller;

[0008] An electric power system simulator is installed on one side of the center console, and a grid frequency detector is installed in the middle of the upper surface of the electric power system simulator. An inverter is installed on the other side of the center console, an inverter frequency detector is installed on one side of the upper surface of the inverter, and a load interference simulator is installed on the other side of the upper surface of the inverter. A high-frequency signal receiver is installed in the middle of the upper surface of the center console. A first storage plate is fixedly connected to the top of the inner wall of the center console, a central controller is installed in the middle of the upper surface of the first storage plate, a speed regulator is installed on one side of the upper surface of the first storage plate, a second storage plate is fixedly connected to the middle of the inner wall of the center console, a data processor is installed on one side of the upper surface of the second storage plate, and a data simulator is installed on the other side of the upper surface of the second storage plate.

[0009] As a further preferred embodiment of the present technical solution: a touch screen is installed in the middle of the front surface of the center console, and a door body is hinged to the rear surface of the center console via a rotating shaft.

[0010] As a further preferred embodiment of the present technical solution: a timer is installed on one side of the upper surface of the first storage plate, and a relay is installed on the other side of the upper surface of the first storage plate.

[0011] As a further preferred embodiment of the present technical solution: a third storage plate is fixedly connected to the bottom of the inner wall of the center console, and a data converter is installed on one side of the upper surface of the third storage plate.

[0012] As a further preferred embodiment of the present technical solution: a warning light is installed on one side of the upper surface of the center console, and a memory is installed on the other side of the upper surface of the third storage plate.

[0013] As a further preferred embodiment of the present technical solution: the signal output ends of the touch screen, high-frequency signal receiver, timer, inverter frequency detector, grid frequency detector, data processor, data simulator and data converter are electrically connected to the signal input end of the central controller through wires, the signal output end of the central controller is electrically connected to the signal input ends of the power system simulator, inverter, touch screen, speed regulator, data processor, data simulator, data converter, memory and load interference simulator through wires, and the signal output end of the data processor is electrically connected to the signal input end of the data simulator through a wire.

[0014] As a further preferred embodiment of the present technical solution: the electrical output end of the central controller is electrically connected to the electrical input end of the relay through a wire, and the electrical output end of the relay is electrically connected to the electrical input end of the warning light through a wire.

[0015] A test method for primary frequency modulation of a photovoltaic power station, comprising the following steps:

[0016] S1. Using a high-frequency signal receiver and a photovoltaic power station acquisition system to collect inverter frequency, grid frequency, and load data of the photovoltaic power station in real time;

[0017] S2, receiving data from the high-frequency signal receiver through the central controller, and controlling the frequencies of the power system simulator, inverter, and load interference simulator according to the data;

[0018] S3, detecting the frequency data of the current power system simulator and the inverter respectively through the inverter frequency detector and the grid frequency detector, and feeding the detected data back to the central controller;

[0019] S4. Receive data from the central controller through the data processor, calculate and process the data, obtain the frequency modulation PID parameters and the artificial dead zone range value, and feed the data back to the central controller;

[0020] S5. The data simulator combines the data of the central controller and the data processor to perform modeling and simulation calculations on the frequency modulation PID parameters, and feeds the data back to the central controller;

[0021] S6. Process the feedback data through the central controller and transmit the processed data to the speed regulator, which then uses the processed data to perform a frequency modulation test.

[0022] S7. The time of a frequency modulation operation is counted by a timer, and then a data converter uses the data of the central controller and the timer to generate a power system simulator and inverter frequency change curve, and displays it on the touch screen.

[0023] As a further preferred embodiment of the present technical solution: in said S2, the central controller uses the real-time data of the photovoltaic power station received by the high-frequency signal receiver to control the operating frequency of the power system simulator and the inverter, and uses the power system simulator and the inverter to perform on-site simulation.

[0024] As a further preferred embodiment of the present technical solution: in said S6, when the data processed by the central controller is within the range of the artificial dead zone, the speed regulator does not perform a frequency modulation action; when the processed data is higher or lower than the range of the artificial dead zone, the speed regulator performs a corresponding frequency modulation action.

[0025] Advantages of the present invention: The present invention receives the inverter frequency, grid frequency and load data of the photovoltaic power station in real time through a high-frequency signal receiver, and then performs on-site simulation according to the received data through a power system simulator, a load interference simulator and an inverter, and then calculates the frequency modulation PID parameters and the artificial dead zone range value through a data processor, and then determines whether to perform a frequency modulation action through a central controller, and when a frequency modulation action is required, a frequency modulation test is completed through a speed regulator, so that the frequency modulation system can be tested according to the real-time on-site data, thereby improving the accuracy of the data and avoiding the occurrence of deviations in the test results. Description of the drawings:

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a cross-sectional structural schematic diagram of the present invention;

[0029] Figure 3 It is a schematic diagram of the longitudinal structure of the present invention;

[0030] Figure 4 It is a flow chart of the steps of the present invention.

[0031] In the figure: 1. Body assembly; 2. Test mechanism; 101. Central console; 102. Power system simulator; 103. Inverter; 104. Touch screen; 105. High-frequency signal receiver; 201. Inverter frequency detector; 202. Grid frequency detector; 203. Load interference simulator; 204. Speed ​​regulator; 205. Data processor; 206. Data simulator; 207. Data converter; 208. Central controller; 41. Warning light; 42. Door; 43. First storage board; 44. Memory; 45. Timer; 46. Relay; 47. Second storage board; 48. Third storage board. Specific implementation method:

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example

[0034] See also Figure 1-4 The present invention provides a technical solution: a test device for primary frequency regulation of a photovoltaic power station, comprising

[0035] The body component 1 includes a central console 101, a power system simulator 102, an inverter 103, a touch screen 104 and a high-frequency signal receiver 105;

[0036] Test mechanism 2, which includes an inverter frequency detector 201, a grid frequency detector 202, a load disturbance simulator 203, a speed regulator 204, a data processor 205, a data simulator 206, a data converter 207, and a central controller 208;

[0037] A power system simulator 102 is installed on one side of the central console 101, and a grid frequency detector 202 is installed in the middle of the upper surface of the power system simulator 102. An inverter 103 is installed on the other side of the central console 101, and an inverter frequency detector 201 is installed on one side of the upper surface of the inverter 103, and a load interference simulator 203 is installed on the other side of the upper surface of the inverter 103. A high-frequency signal receiver 105 is installed in the middle of the upper surface of the central console 101. A first storage plate 43 is fixedly connected to the top of the inner wall of the central console 101, a central controller 208 is installed in the middle of the upper surface of the first storage plate 43, and a speed regulator 204 is installed on one side of the upper surface of the first storage plate 43. A second storage plate 47 is fixedly connected to the middle of the inner wall of the central console 101, a data processor 205 is installed on one side of the upper surface of the second storage plate 47, and a data simulator 206 is installed on the other side of the upper surface of the second storage plate 47.

[0038] In this embodiment, specifically: a touch screen 104 is installed in the middle of the front surface of the center console 101, and the rear surface of the center console 101 is hinged with a door body 42 through a rotating shaft; the touch screen 104 is used to display data feedback from the central controller 208, and control instructions can be entered into the central controller 208.

[0039] In this embodiment, specifically: a timer 45 is installed on one side of the upper surface of the first storage plate 43 , and a relay 46 is installed on the other side of the upper surface of the first storage plate 43 ; the timer 45 is used to count the time of one frequency modulation operation.

[0040] In this embodiment, specifically: a third storage plate 48 is fixedly connected to the bottom of the inner wall of the center console 101, and a data converter 207 is installed on one side of the upper surface of the third storage plate 48; the data converter 207 uses the data of the central controller 208 and the timer 45 to generate a curve chart of the frequency changes of the power system simulator 102 and the inverter 103.

[0041] In this embodiment, specifically: a warning light 41 is installed on one side of the upper surface of the center console 101 , and a memory 44 is installed on the other side of the upper surface of the third storage plate 48 ; data is backed up through the memory 44 .

[0042] In this embodiment, specifically: the signal output ends of the touch screen 104, the high-frequency signal receiver 105, the timer 45, the inverter frequency detector 201, the grid frequency detector 202, the data processor 205, the data simulator 206 and the data converter 207 are electrically connected to the signal input ends of the central controller 208 through wires, the signal output end of the central controller 208 is electrically connected to the signal input ends of the power system simulator 102, the inverter 103, the touch screen 104, the speed regulator 204, the data processor 205, the data simulator 206, the data converter 207, the memory 44 and the load interference simulator 203 through wires, and the signal output end of the data processor 205 is electrically connected to the signal input end of the data simulator 206 through a wire; data from the touch screen 104, the high-frequency signal receiver 105, the timer 45, the inverter frequency detector 201, the grid frequency detector 202, the data processor 205, the data simulator 206 and the data converter 207 are received by the central controller 208.

[0043] In this embodiment, specifically: the electrical output end of the central controller 208 is electrically connected to the electrical input end of the relay 46 through a wire, and the electrical output end of the relay 46 is electrically connected to the electrical input end of the warning light 41 through a wire; the warning light 41 is turned on and off by the relay 46.

[0044] A test method for primary frequency modulation of a photovoltaic power station, comprising the following steps:

[0045] S1. Using the high-frequency signal receiver 105 and the photovoltaic power station's acquisition system, the photovoltaic power station's inverter frequency, grid frequency, and load data are collected in real time;

[0046] S2, receiving data from the high-frequency signal receiver 105 through the central controller 208, and controlling the frequencies of the power system simulator 102, the inverter 103 and the load disturbance simulator 203 according to the data;

[0047] S3, respectively detecting the frequency data of the current power system simulator 102 and the inverter 103 through the inverter frequency detector 201 and the grid frequency detector 202, and feeding the detected data back to the central controller 208;

[0048] S4. The data processor 205 receives data from the central controller 208, calculates and processes the data, obtains the frequency modulation PID parameters and the artificial dead zone range value, and feeds the data back to the central controller 208;

[0049] S5. The data simulator 206 combines the data of the central controller 208 and the data processor 205 to perform modeling and simulation calculations on the frequency modulation PID parameters, and feeds the data back to the central controller 208;

[0050] S6. The central controller 208 processes the feedback data and transmits the processed data to the speed regulator 204. The speed regulator 204 then performs a frequency modulation test using the processed data.

[0051] S7. The time of a frequency modulation operation is counted through the timer 45, and then the frequency change curve of the power system simulator 102 and the inverter 103 is generated by the data converter 207 using the data of the central controller 208 and the timer 45, and displayed on the touch screen 104.

[0052] In this embodiment, specifically: in S2, the central controller 208 uses the real-time data of the photovoltaic power station received by the high-frequency signal receiver 105 to control the operating frequency of the power system simulator 102 and the inverter 103, and uses the power system simulator 102 and the inverter 103 to perform on-site simulation; the power system simulator 102 and the inverter 103 are combined with the real-time data of the photovoltaic power station to perform on-site simulation.

[0053] In this embodiment, specifically: in S6, when the data processed by the central controller 208 is within the artificial dead zone, the speed regulator 204 does not perform a frequency modulation action; when the processed data is higher or lower than the artificial dead zone, the speed regulator 204 performs a corresponding frequency modulation action; the central controller 208 determines whether a frequency modulation action is needed based on the feedback data.

[0054] Working principle or structural principle: When in use, the inverter frequency, grid frequency and load data of the photovoltaic power station are collected in real time by the high-frequency signal receiver 105 using the collection system of the photovoltaic power station, and then the data of the high-frequency signal receiver 105 is received by the central controller 208, and the data is preliminarily processed, and then the processed data is transmitted to the power system simulator 102, the inverter 103 and the load interference simulator 203 respectively through the central controller 208, so that the inverter frequency, grid frequency and load data of the photovoltaic power station are simulated on site by the power system simulator 102, the inverter 103 and the load interference simulator 203, and then the inverter frequency detector is used to detect the inverter frequency, grid frequency and load data of the photovoltaic power station. 201 and the grid frequency detector 202 detect the frequency data of the current power system simulator 102 and the inverter 103 respectively, and feed the detected data back to the central controller 208, and then transmit the feedback data and the received data to the data processor 205 and the data simulator 206 respectively through the central controller 208, and then the data processor 205 calculates and processes the data to obtain the frequency modulation PID parameters and the artificial dead zone range value, and then the data simulator 206 combines the data of the central controller 208 and the data processor 205 to model and simulate the frequency modulation PID parameters to ensure the accuracy of the parameters, and then receives the data through the central controller 208. The feedback data of the data processor 205 and the data simulator 206 are then calculated and processed by the central controller 208. When the calculated and processed data is within the artificial dead zone, the central controller 208 transmits the data to the memory 44 for storage and backup, and displays the data processed by the central controller 208 through the touch screen 104 for staff to view. When the calculated and processed data is higher or lower than the artificial dead zone, the central controller 208 transmits the processed data to the speed regulator 204, and then the speed regulator 204 performs a frequency modulation test according to the received data, and then the timer 45 is used to calculate the time of the frequency modulation operation. Statistics are performed, and then a curve diagram of the frequency change of the power system simulator 102 and the inverter 103 is generated by the data converter 207 using the data of the central controller 208 and the timer 45, and displayed on the touch screen 104. When the primary frequency modulation operation time exceeds the threshold or the modeling calculation parameters of the data simulator 206 are incorrect, the central controller 208 starts the relay 46 to work, and the working relay 46 starts the warning light 41 to work, and the working warning light 41 sounds an alarm to remind the staff to check. The present invention can not only test the primary frequency modulation system according to real-time data on site, but also improve the accuracy of the data, and avoid the occurrence of deviations in the test results.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A test device for primary frequency modulation of a photovoltaic power station, characterized in that: The invention comprises a machine body component (1), wherein the machine body component (1) comprises a central console (101), a power system simulator (102), an inverter (103), a touch screen (104) and a high-frequency signal receiver (105); A test mechanism (2), comprising an inverter frequency detector (201), a grid frequency detector (202), a load interference simulator (203), a speed regulator (204), a data processor (205), a data simulator (206), a data converter (207), and a central controller (208); A power system simulator (102) is installed on one side of the central console (101), a grid frequency detector (202) is installed in the middle of the upper surface of the power system simulator (102), an inverter (103) is installed on the other side of the central console (101), an inverter frequency detector (201) is installed on one side of the upper surface of the inverter (103), a load interference simulator (203) is installed on the other side of the upper surface of the inverter (103), and a high-frequency signal receiver (105) is installed in the middle of the upper surface of the central console (101). ), a first storage plate (43) is fixedly connected to the top of the inner side wall of the center console (101), a central controller (208) is installed in the middle of the upper surface of the first storage plate (43), a speed regulator (204) is installed on one side of the upper surface of the first storage plate (43), a second storage plate (47) is fixedly connected to the middle of the inner side wall of the center console (101), a data processor (205) is installed on one side of the upper surface of the second storage plate (47), and a data simulator (206) is installed on the other side of the upper surface of the second storage plate (47); The signal output ends of the touch screen (104), high-frequency signal receiver (105), timer (45), inverter frequency detector (201), grid frequency detector (202), data processor (205), data simulator (206) and data converter (207) are electrically connected to the signal input end of the central controller (208) through a wire; the signal output end of the central controller (208) is electrically connected to the signal input ends of the power system simulator (102), inverter (103), touch screen (104), speed regulator (204), data processor (205), data simulator (206), data converter (207), memory (44) and load interference simulator (203) through a wire; the signal output end of the data processor (205) is electrically connected to the signal input end of the data simulator (206) through a wire; The electrical output end of the central controller (208) is electrically connected to the electrical input end of the relay (46) through a wire, and the electrical output end of the relay (46) is electrically connected to the electrical input end of the warning light (41) through a wire.

2. A test device for primary frequency modulation of a photovoltaic power station according to claim 1, characterized in that: A touch screen (104) is installed in the middle of the front surface of the center console (101), and a door body (42) is hinged to the rear surface of the center console (101) via a rotating shaft.

3. The test device for primary frequency modulation of a photovoltaic power station according to claim 1, characterized in that: A timer (45) is installed on one side of the upper surface of the first storage plate (43), and a relay (46) is installed on the other side of the upper surface of the first storage plate (43).

4. A test device for primary frequency modulation of a photovoltaic power station according to claim 3, characterized in that: A third storage plate (48) is fixedly connected to the bottom of the inner side wall of the center console (101), and a data converter (207) is installed on one side of the upper surface of the third storage plate (48).

5. The test device for primary frequency modulation of a photovoltaic power station according to claim 4, characterized in that: A warning light (41) is installed on one side of the upper surface of the center console (101), and a memory (44) is installed on the other side of the upper surface of the third storage plate (48).

6. A test method for primary frequency modulation of a photovoltaic power station, comprising the following steps: S1, using a high-frequency signal receiver (105) and a collection system of the photovoltaic power station to collect the inverter frequency, grid frequency and load data of the photovoltaic power station in real time; S2, receiving data from a high-frequency signal receiver (105) through a central controller (208), and controlling the frequencies of a power system simulator (102), an inverter (103), and a load disturbance simulator (203) according to the data; S3, detecting the frequency data of the current power system simulator (102) and the inverter (103) respectively through the inverter frequency detector (201) and the grid frequency detector (202), and feeding the detected data back to the central controller (208); S4, receiving data from the central controller (208) through the data processor (205), performing calculations on the data, obtaining frequency modulation PID parameters and artificial dead zone range values, and feeding the data back to the central controller (208); S5. Using the data simulator (206) and the data from the central controller (208) and the data processor (205), a modeling simulation calculation is performed on the frequency modulation PID parameters, and the data is fed back to the central controller (208); S6. Processing the feedback data through the central controller (208), transmitting the processed data to the speed regulator (204), and then performing a frequency modulation test through the speed regulator (204) using the processed data; S7. The time of a frequency modulation operation is counted by the timer (45), and then the frequency change curve of the power system simulator (102) and the inverter (103) is generated by the data converter (207) using the data of the central controller (208) and the timer (45), and the frequency change curve is displayed on the touch screen (104).

7. A test method for primary frequency modulation of a photovoltaic power station according to claim 6, characterized in that: In S2, the central controller (208) uses the real-time data of the photovoltaic power station received by the high-frequency signal receiver (105) to control the operating frequency of the power system simulator (102) and the inverter (103), and uses the power system simulator (102) and the inverter (103) to perform on-site simulation.

8. A test method for primary frequency modulation of a photovoltaic power station according to claim 6, characterized in that: In said S6, when the data processed by the central controller (208) is within the artificial dead zone, the speed regulator (204) does not perform a frequency modulation action; when the processed data is higher or lower than the artificial dead zone, the speed regulator (204) performs a corresponding frequency modulation action.

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