A control method and system for energy-consuming device based on controllable switching frequency

Abstract

The present application proposes a control method and system for an energy-consuming device based on controllable switching frequency, the method comprising: when the DC voltage of the flexible direct current transmission system is greater than a preset voltage value, obtaining the input power and output power of the DC side of the receiving system; determining the switching frequency of the energy-consuming device according to the input power and output power of the DC side of the receiving system; and controlling the energy-consuming device based on the switching frequency of the energy-consuming device. The technical solution proposed in the present application can dynamically adjust the energy consumption value of the energy-consuming device according to changes in the electrical parameters of the system, thereby achieving smooth adjustment of the DC voltage.

Description

Technical Field

[0001] The present application relates to the field of direct current voltage control, and in particular to a method and system for controlling an energy-consuming device based on controllable switching frequency. Background Art

[0002] In the offshore wind farm's flexible direct current transmission system, when a fault occurs on the grid side, the power injected by the wind farm remains unchanged for a certain period of time, and there will be an imbalance in the power at the sending and receiving ends. At this time, a large amount of unbalanced power will flow into the converter submodule, causing the DC voltage of the overhead line or submarine cable to rise rapidly. In severe cases, it will also cause the DC system to be paralyzed. There is also a risk of disconnection from the grid for the wind turbines at the sending end of the offshore system, which will cause economic losses and threaten the safety and stability of the entire power grid system. This requires the transmission system itself to have the function of balancing surplus power. One solution is to install an AC energy-consuming device on the wind farm side. Considering the area and load limit of the offshore wind power converter station platform, installing an energy-consuming device on the DC side of the onshore converter station is more suitable for the application scenario of offshore wind power direct current transmission.

[0003] However, in the existing energy-consuming devices, the reactance value is constant when the frequency is fixed, and the power that can be absorbed by the resistor is limited. It is impossible to smoothly absorb the excess power of the system, which will cause large fluctuations in the DC voltage. Summary of the invention

[0004] The present application provides a control method and system for an energy-consuming device based on controllable switching frequency, so as to at least solve the technical problem that the smooth absorption of excess power of the system cannot be achieved, which will cause large fluctuations in DC voltage.

[0005] The first embodiment of the present application proposes a control method for an energy-consuming device based on controllable switching frequency, the method comprising:

[0006] Monitor the DC voltage of the offshore wind power flexible direct current transmission system connected to energy consumption devices;

[0007] When the DC voltage of the flexible DC transmission system is greater than a preset voltage value, the input power and output power of the DC side of the receiving system are obtained;

[0008] Determining the switching frequency of the energy consuming device according to the input power and output power of the DC side of the receiving system;

[0009] Controlling the energy consuming device based on the switching frequency of the energy consuming device;

[0010] Wherein, the energy consumption device includes: a first switch, a second switch, a third switch, a fourth switch, a reactor, and a resistor;

[0011] One end of the first switch is connected to the energy consumption end, and the other end is connected to the first end of the reactor;

[0012] One end of the fourth switch is connected to the second end of the reactor, and the other end is connected to the resistor;

[0013] One end of the second switch is connected to the energy consumption end, and the other end is connected to the second end of the reactor;

[0014] One end of the third switch is connected to the first end of the reactor, and the other end is connected to the resistor;

[0015] Or, the energy dissipation device includes: a first switch, a second switch, a third switch, a fourth switch, a first reactor, a second reactor, a resistor, a first diode, and a second diode;

[0016] The anode of the first diode is connected to the first end of the first reactor to form a first path, the cathode of the second diode is connected to the first end of the second reactor to form a second path, and the first path and the second path are connected in parallel;

[0017] One end of the first switch is connected to the energy consumption end, and the other end is connected to the anode of the second diode, and the cathode of the second diode is connected to the first end of the second reactor;

[0018] One end of the fourth switch is connected to the second end of the second reactor, and the other end is connected to the resistor;

[0019] One end of the second switch is connected to the energy consumption end, and the other end is connected to the second end of the first reactor, and the anode of the first diode is connected to the first end of the first reactor;

[0020] One end of the third switch is connected to the cathode of the first diode, and the other end is connected to the resistor;

[0021] The calculation formula of the switching frequency of the energy consumption device is as follows:

[0022]

[0023] Where f is the switching frequency of the energy consumption device, P out is the output power of the DC side of the receiving system, P in is the input power of the DC side of the receiving system, f max It is the maximum switching frequency of the preset energy-consuming device.

[0024] Preferably, the method further comprises:

[0025] Obtaining the AC bus voltage of the AC system;

[0026] Determining the switching frequency of the energy consuming device according to the AC bus voltage;

[0027] Controlling the energy consuming device based on the switching frequency of the energy consuming device

[0028] Furthermore, the calculation formula for the switching frequency of the energy consumption device is as follows:

[0029]

[0030] Where f is the switching frequency of the energy consumption device, U ac is the AC bus voltage of the AC system, U N is the rated value of the AC bus voltage of the receiving system, f max It is the maximum switching frequency of the preset energy-consuming device.

[0031] Preferably, the energy dissipation device is a centralized energy dissipation resistor device.

[0032] The second aspect of the present application provides a control system for an energy-consuming device based on controllable switching frequency, the system comprising:

[0033] A monitoring module, used to monitor the DC voltage of an offshore wind power flexible direct current transmission system connected to an energy consumption device;

[0034] A first acquisition module is used to acquire the input power and output power of the DC side of the receiving system when the DC voltage of the flexible DC transmission system is greater than a preset voltage value;

[0035] A first determination module, used to determine the switching frequency of the energy consumption device according to the input power and output power of the DC side of the receiving system;

[0036] A first control module, used for controlling the energy consuming device based on the switching frequency of the energy consuming device;

[0037] Wherein, the energy consumption device includes: a first switch, a second switch, a third switch, a fourth switch, a reactor, and a resistor;

[0038] One end of the first switch is connected to the energy consumption end, and the other end is connected to the first end of the reactor;

[0039] One end of the fourth switch is connected to the second end of the reactor, and the other end is connected to the resistor;

[0040] One end of the second switch is connected to the energy consumption end, and the other end is connected to the second end of the reactor;

[0041] One end of the third switch is connected to the first end of the reactor, and the other end is connected to the resistor;

[0042] Or, the energy dissipation device includes: a first switch, a second switch, a third switch, a fourth switch, a first reactor, a second reactor, a resistor, a first diode, and a second diode;

[0043] The anode of the first diode is connected to the first end of the first reactor to form a first path, the cathode of the second diode is connected to the first end of the second reactor to form a second path, and the first path and the second path are connected in parallel;

[0044] One end of the first switch is connected to the energy consumption end, and the other end is connected to the anode of the second diode, and the cathode of the second diode is connected to the first end of the second reactor;

[0045] One end of the fourth switch is connected to the second end of the second reactor, and the other end is connected to the resistor;

[0046] One end of the second switch is connected to the energy consumption end, and the other end is connected to the second end of the first reactor, and the anode of the first diode is connected to the first end of the first reactor;

[0047] One end of the third switch is connected to the cathode of the first diode, and the other end is connected to the resistor;

[0048] The calculation formula of the switching frequency of the energy consumption device is as follows:

[0049]

[0050] Where f is the switching frequency of the energy consumption device, P out is the output power of the DC side of the receiving system, P in is the input power of the DC side of the receiving system, f max It is the maximum switching frequency of the preset energy-consuming device.

[0051] Preferably, the control system further comprises:

[0052] The second acquisition module is used to acquire the AC bus voltage of the AC system;

[0053] A second determination module, used to determine the switching frequency of the energy consumption device according to the AC bus voltage;

[0054] The second control module is used to control the energy consuming device based on the switching frequency of the energy consuming device.

[0055] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in the first aspect is implemented.

[0056] A fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in the first aspect of the present application.

[0057] The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0058] The present application proposes a control method and system for an energy-consuming device based on controllable switching frequency, wherein the method described includes: when the DC voltage of the flexible direct current transmission system is greater than a preset voltage value, obtaining the input power and output power of the DC side of the receiving system; determining the switching frequency of the energy-consuming device according to the input power and output power of the DC side of the receiving system; and controlling the energy-consuming device based on the switching frequency of the energy-consuming device. The technical solution proposed in the present application can dynamically adjust the energy consumption value of the energy-consuming device according to changes in the electrical parameters of the system, thereby achieving smooth adjustment of the DC voltage.

[0059] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0061] Figure 1 A first flow chart of a method for controlling an energy-consuming device based on controllable switching frequency according to an embodiment of the present application;

[0062] Figure 2 A schematic diagram of an offshore wind power flexible direct current transmission system connected to an energy consumption device provided according to an embodiment of the present application;

[0063] Figure 3 A second flow chart of a method for controlling an energy-consuming device based on controllable switching frequency according to an embodiment of the present application;

[0064] Figure 4 A first structural diagram of an energy consumption device provided according to an embodiment of the present application;

[0065] Figure 5 A second structural diagram of an energy consumption device provided according to an embodiment of the present application;

[0066] Figure 6 A first structural diagram of a control system for an energy-consuming device based on controllable switching frequency provided according to an embodiment of the present application;

[0067] Figure 7A second structural diagram of a control system for an energy-consuming device based on controllable switching frequency provided according to an embodiment of the present application;

[0068] Reference numerals

[0069] A first switch T1 , a second switch T2 , a third switch T3 , a fourth switch T4 , a reactor L, a resistor R, a first reactor L1 , a second reactor L2 , a first diode D1 , and a second diode D2 . DETAILED DESCRIPTION

[0070] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0071] The present application proposes a control method and system for an energy-consuming device based on controllable switching frequency, wherein the method described includes: when the DC voltage of the flexible direct current transmission system is greater than a preset voltage value, obtaining the input power and output power of the DC side of the receiving system; determining the switching frequency of the energy-consuming device according to the input power and output power of the DC side of the receiving system; and controlling the energy-consuming device based on the switching frequency of the energy-consuming device. The technical solution proposed in the present application can dynamically adjust the energy consumption value of the energy-consuming device according to changes in the electrical parameters of the system, thereby achieving smooth adjustment of the DC voltage.

[0072] A method and system for controlling an energy-consuming device based on controllable switching frequency according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0073] Embodiment 1

[0074] Figure 1 Flow chart of a method for controlling an energy-consuming device based on controllable switching frequency according to an embodiment of the present application, as shown in FIG. Figure 1 As shown, the method includes:

[0075] Step 1: Monitor the DC voltage of the offshore wind power flexible direct current transmission system connected to the energy consumption device. The schematic diagram of the offshore wind power flexible direct current transmission system connected to the energy consumption device is as follows: Figure 2 As shown;

[0076] Step 2: When the DC voltage of the flexible DC transmission system is greater than a preset voltage value, the input power and output power of the DC side of the receiving system are obtained;

[0077] Step 3: Determine the switching frequency of the energy consuming device according to the input power and output power of the DC side of the receiving system; further, the calculation formula of the switching frequency of the energy consuming device is as follows:

[0078]

[0079] Where f is the switching frequency of the energy consumption device, P out is the output power of the DC side of the receiving system, P in is the input power of the DC side of the receiving system, f max It is the maximum switching frequency of the preset energy-consuming device.

[0080] Step 4: Controlling the energy consuming device based on the switching frequency of the energy consuming device.

[0081] In the embodiments of the present disclosure, Figure 3 As shown, the method also includes:

[0082] Step F1: obtaining the AC bus voltage of the AC system;

[0083] Step F2: determining the switching frequency of the energy consuming device according to the AC bus voltage;

[0084] Furthermore, the calculation formula for the switching frequency of the energy consumption device is as follows:

[0085]

[0086] Where f is the switching frequency of the energy consumption device, U ac is the AC bus voltage of the AC system, U N is the rated value of the AC bus voltage of the receiving system, f max It is the maximum switching frequency of the preset energy-consuming device.

[0087] Step F3: Controlling the energy consuming device based on the switching frequency of the energy consuming device.

[0088] It should be noted that the energy dissipation device is a centralized energy dissipation resistor device.

[0089] Furthermore, the structure of the energy dissipation device is as follows: Figure 4 As shown or Figure 5 As shown;

[0090] Among them, Figure 4 As shown, the energy consumption device includes: a first switch T1, a second switch T2, a third switch T3, a fourth switch T4, a reactor L, and a resistor R;

[0091] One end of the first switch T1 is connected to the energy consumption end, and the other end is connected to the first end of the reactor L;

[0092] One end of the fourth switch T4 is connected to the second end of the reactor L, and the other end is connected to the resistor R;

[0093] One end of the second switch T2 is connected to the energy consumption end, and the other end is connected to the second end of the reactor L;

[0094] One end of the third switch T3 is connected to the first end of the reactor L, and the other end is connected to the resistor R;

[0095] or, as Figure 5 As shown, the energy dissipation device includes: a first switch T1, a second switch T2, a third switch T3, a fourth switch T4, a first reactor L1, a second reactor L2, a resistor R, a first diode D1, and a second diode D2;

[0096] The anode of the first diode D1 is connected to the first end of the first reactor L1 to form a first path, the cathode of the second diode D2 is connected to the first end of the second reactor L2 to form a second path, and the first path and the second path are connected in parallel;

[0097] One end of the first switch is connected to the energy consumption end, and the other end is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the first end of the second reactor L2;

[0098] One end of the fourth switch is connected to the second end of the second reactor, and the other end is connected to the resistor;

[0099] One end of the second switch T2 is connected to the energy consumption end, and the other end is connected to the second end of the first reactor L1, and the anode of the first diode D1 is connected to the first end of the first reactor L1;

[0100] One end of the third switch T3 is connected to the cathode of the first diode D1 , and the other end of the third switch T3 is connected to the resistor R.

[0101] in, Figure 4 In the figure, T1-T4 are fully controlled power electronic devices, which can be composed of several fully controlled devices connected in series and can be turned on and off autonomously; L is a reactor; R is a concentrated resistor. When the system is operating normally, all energy-consuming devices are in the off state. In the case of a fault in the receiving end system, when the AC bus voltage of the receiving end AC system is reduced, the DC system voltage increases. When it increases to the upper limit of the DC voltage, the energy-consuming device automatically starts. T1 and T4 are a group, and T2 and T3 are a group. The two groups are triggered to conduct at a certain frequency. Since the inductor conducts DC and blocks AC, the switching frequency is set under different fault severity to achieve power absorption of the energy-consuming device.

[0102] Figure 5In the figure, T1-T4 are fully controlled power electronic devices that can be turned on and off autonomously; L is a reactor; D1-D2 are diodes; and R is a concentrated resistor. When the system is operating normally, all energy-consuming devices are in the off state. In the case of a system failure at the receiving end, the energy-consuming device is started, T1 and T4 are a group, and T2 and T3 are a group. The two groups are triggered to conduct at a certain frequency f. Since the inductor conducts DC and blocks AC, the switching frequency is set under different fault severity to achieve power absorption of the energy-consuming device.

[0103] In summary, the energy consumption device control method based on controllable switching frequency proposed in this embodiment can dynamically adjust the energy consumption value of the energy consumption device according to changes in system electrical parameters to achieve smooth adjustment of the DC voltage.

[0104] Embodiment 2

[0105] Figure 6 FIG. 1 is a structural diagram of a control system for an energy-consuming device based on controllable switching frequency according to an embodiment of the present application, such as Figure 6 As shown, the system comprises:

[0106] A monitoring module 100 is used to monitor the DC voltage of an offshore wind power flexible direct current transmission system connected to an energy consumption device;

[0107] The first acquisition module 200 is used to acquire the input power and output power of the DC side of the receiving system when the DC voltage of the flexible DC transmission system is greater than a preset voltage value;

[0108] A first determination module 300 is used to determine the switching frequency of the energy consumption device according to the input power and output power of the DC side of the receiving system;

[0109] A first control module 400, configured to control the energy consuming device based on the switching frequency of the energy consuming device;

[0110] Wherein, the energy consumption device includes: a first switch, a second switch, a third switch, a fourth switch, a reactor, and a resistor;

[0111] One end of the first switch is connected to the energy consumption end, and the other end is connected to the first end of the reactor;

[0112] One end of the fourth switch is connected to the second end of the reactor, and the other end is connected to the resistor;

[0113] One end of the second switch is connected to the energy consumption end, and the other end is connected to the second end of the reactor;

[0114] One end of the third switch is connected to the first end of the reactor, and the other end is connected to the resistor;

[0115] Or, the energy dissipation device includes: a first switch, a second switch, a third switch, a fourth switch, a first reactor, a second reactor, a resistor, a first diode, and a second diode;

[0116] The anode of the first diode is connected to the first end of the first reactor to form a first path, the cathode of the second diode is connected to the first end of the second reactor to form a second path, and the first path and the second path are connected in parallel;

[0117] One end of the first switch is connected to the energy consumption end, and the other end is connected to the anode of the second diode, and the cathode of the second diode is connected to the first end of the second reactor;

[0118] One end of the fourth switch is connected to the second end of the second reactor, and the other end is connected to the resistor;

[0119] One end of the second switch is connected to the energy consumption end, and the other end is connected to the second end of the first reactor, and the anode of the first diode is connected to the first end of the first reactor;

[0120] One end of the third switch is connected to the cathode of the first diode, and the other end is connected to the resistor;

[0121] The calculation formula of the switching frequency of the energy consumption device is as follows:

[0122]

[0123] Where f is the switching frequency of the energy consumption device, P out is the output power of the DC side of the receiving system, P in is the input power of the DC side of the receiving system, f max It is the maximum switching frequency of the preset energy-consuming device.

[0124] In the embodiments of the present disclosure, Figure 7 As shown, the control system also includes:

[0125] The second acquisition module 500 is used to acquire the AC bus voltage of the AC system;

[0126] A second determination module 600 is used to determine the switching frequency of the energy consumption device according to the AC bus voltage;

[0127] The second control module 700 is used to control the energy consuming device based on the switching frequency of the energy consuming device.

[0128] Furthermore, the calculation formula for the switching frequency of the energy consumption device is as follows:

[0129]

[0130] Where f is the switching frequency of the energy consumption device, U ac is the AC bus voltage of the AC system, U N is the AC bus voltage of the AC system, f max It is the maximum switching frequency of the preset energy-consuming device.

[0131] It should be noted that the energy dissipation device is a centralized energy dissipation resistor device.

[0132] In summary, the energy consumption device control system based on controllable switching frequency proposed in this embodiment can dynamically adjust the energy consumption value of the energy consumption device according to changes in system electrical parameters to achieve smooth adjustment of the DC voltage.

[0133] Embodiment 3

[0134] In order to implement the above embodiments, the present disclosure further proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in Embodiment 1 is implemented.

[0135] Embodiment 4

[0136] In order to implement the above embodiments, the present disclosure further proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method described in the first embodiment is implemented.

[0137] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0138] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0139] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A control method for an energy-consuming device based on controllable switching frequency, characterized in that: The method comprises: Monitor the DC voltage of the offshore wind power flexible direct current transmission system connected to energy consumption devices; When the DC voltage of the flexible DC transmission system is greater than a preset voltage value, the input power and output power of the DC side of the receiving system are obtained; Determining the switching frequency of the energy consuming device according to the input power and output power of the DC side of the receiving system; Controlling the energy consuming device based on the switching frequency of the energy consuming device; Wherein, the energy consumption device includes: a first switch, a second switch, a third switch, a fourth switch, a reactor, and a resistor; One end of the first switch is connected to the energy consumption end, and the other end is connected to the first end of the reactor; One end of the fourth switch is connected to the second end of the reactor, and the other end is connected to the resistor; One end of the second switch is connected to the energy consumption end, and the other end is connected to the second end of the reactor; One end of the third switch is connected to the first end of the reactor, and the other end is connected to the resistor; Or, the energy dissipation device includes: a first switch, a second switch, a third switch, a fourth switch, a first reactor, a second reactor, a resistor, a first diode, and a second diode; The anode of the first diode is connected to the first end of the first reactor to form a first path, the cathode of the second diode is connected to the first end of the second reactor to form a second path, and the first path and the second path are connected in parallel; One end of the first switch is connected to the energy consumption end, and the other end is connected to the anode of the second diode, and the cathode of the second diode is connected to the first end of the second reactor; One end of the fourth switch is connected to the second end of the second reactor, and the other end is connected to the resistor; One end of the second switch is connected to the energy consumption end, and the other end is connected to the second end of the first reactor, and the anode of the first diode is connected to the first end of the first reactor; One end of the third switch is connected to the cathode of the first diode, and the other end is connected to the resistor; The calculation formula of the switching frequency of the energy consumption device is as follows: Where f is the switching frequency of the energy consumption device, P out is the output power of the DC side of the receiving system, P in is the input power of the DC side of the receiving system, f max It is the maximum switching frequency of the preset energy-consuming device.

2. The method according to claim 1, characterized in that The method further comprises: Obtaining the AC bus voltage of the AC system; Determining the switching frequency of the energy consuming device according to the AC bus voltage; The energy consuming device is controlled based on the switching frequency of the energy consuming device.

3. The method according to claim 2, characterized in that The calculation formula of the switching frequency of the energy consumption device is as follows: Where f is the switching frequency of the energy consumption device, U ac is the AC bus voltage of the AC system, U N is the rated value of the AC bus voltage of the receiving system, f max It is the maximum switching frequency of the preset energy-consuming device.

4. The method according to claim 1, characterized in that The energy dissipation device is a centralized energy dissipation resistor device.

5. A control system for energy-consuming devices based on controllable switching frequency, characterized in that: include: A monitoring module, used to monitor the DC voltage of an offshore wind power flexible direct current transmission system connected to an energy consumption device; A first acquisition module is used to acquire the input power and output power of the DC side of the receiving system when the DC voltage of the flexible DC transmission system is greater than a preset voltage value; A first determination module, used to determine the switching frequency of the energy consumption device according to the input power and output power of the DC side of the receiving system; A first control module, used for controlling the energy consuming device based on the switching frequency of the energy consuming device; Wherein, the energy consumption device includes: a first switch, a second switch, a third switch, a fourth switch, a reactor, and a resistor; One end of the first switch is connected to the energy consumption end, and the other end is connected to the first end of the reactor; One end of the fourth switch is connected to the second end of the reactor, and the other end is connected to the resistor; One end of the second switch is connected to the energy consumption end, and the other end is connected to the second end of the reactor; One end of the third switch is connected to the first end of the reactor, and the other end is connected to the resistor; Or, the energy dissipation device includes: a first switch, a second switch, a third switch, a fourth switch, a first reactor, a second reactor, a resistor, a first diode, and a second diode; The anode of the first diode is connected to the first end of the first reactor to form a first path, the cathode of the second diode is connected to the first end of the second reactor to form a second path, and the first path and the second path are connected in parallel; One end of the first switch is connected to the energy consumption end, and the other end is connected to the anode of the second diode, and the cathode of the second diode is connected to the first end of the second reactor; One end of the fourth switch is connected to the second end of the second reactor, and the other end is connected to the resistor; One end of the second switch is connected to the energy consumption end, and the other end is connected to the second end of the first reactor, and the anode of the first diode is connected to the first end of the first reactor; One end of the third switch is connected to the cathode of the first diode, and the other end is connected to the resistor; The calculation formula of the switching frequency of the energy consumption device is as follows: Where f is the switching frequency of the energy consumption device, P out is the output power of the DC side of the receiving system, P in is the input power of the DC side of the receiving system, f max It is the maximum switching frequency of the preset energy-consuming device.

6. The control system according to claim 5, characterized in that: The control system further comprises: The second acquisition module is used to acquire the AC bus voltage of the AC system; A second determination module, used to determine the switching frequency of the energy consumption device according to the AC bus voltage; The second control module is used to control the energy consuming device based on the switching frequency of the energy consuming device.

7. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method according to any one of claims 1 to 4 is implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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