SVG dual-machine hot backup control method and SVG dual-machine hot backup system

Abstract

The application discloses an SVG double-machine hot backup control method and an SVG double-machine hot backup system, wherein the SVG double-machine hot backup control method comprises the following steps: a distribution module acquires first state information of a first control module and second state information of a second control module; the distribution module selects one of the first control module and the second control module as a master control module according to the first state information and the second state information; and the distribution module acquires a master control signal generated by the master control module and transmits the master control signal to a power module. When maintenance is needed or a fault occurs, the distribution module selects the first control module or the second control module which can normally operate as the master control module according to the first state information and the second state information, so that the master control signal is not interrupted, and the power is continuously operated, thereby improving the stability of the reactive power compensation function.

Description

Technical Field

[0001] This invention relates to the field of static var generators, and particularly to a dual-machine hot standby control method and a dual-machine hot standby system for SVG. Background Technology

[0002] Static Var Generator (SVG) devices are used to connect to the power grid to achieve dynamic reactive power compensation. An SVG device typically includes a control module and multiple power modules. These power modules are connected to the power grid, and the control module controls their operation to absorb or generate reactive power to meet demand.

[0003] In existing SVG devices, the power module is forced to stop operating during maintenance, such as when the control module is being repaired or malfunctions. Therefore, SVG devices cannot continuously output reactive power to achieve reactive power compensation. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an SVG dual-machine hot standby control method, which enables the power module to operate uninterruptedly during maintenance or in the event of a control failure.

[0005] This invention also proposes an SVG dual-machine hot standby system, which enables the power module to operate uninterruptedly in the event of a fault or during maintenance.

[0006] According to a first aspect of the present invention, the SVG dual-machine hot standby control method includes the following steps:

[0007] The allocation module obtains the first status information of the first control module and the second status information of the second control module;

[0008] The allocation module selects one of the first control module and the second control module as the main control module based on the first status information and the second status information;

[0009] The distribution module acquires the main control signal generated by the main control module and transmits the main control signal to the power module.

[0010] The SVG dual-machine hot standby control method according to embodiments of the present invention has at least the following beneficial effects: The allocation module selects a suitable first or second control module as the master control module based on the first state information of the first control module and the second state information of the second control module. The allocation module transmits the control signal generated by the master control module, i.e., the master control signal, to the power module, enabling the power module to operate normally under the control of the control signal and achieve reactive power compensation. When maintenance is required or a fault occurs, the allocation module selects a capable first or second control module as the master control module based on the first and second state information, ensuring uninterrupted master control signal operation and thus uninterrupted power supply, which helps improve the stability of the reactive power compensation function.

[0011] According to some embodiments of the present invention, the first control module and the second control module communicate with each other to synchronize data and control cycles.

[0012] According to some embodiments of the present invention, in the step of the allocation module selecting one of the first control module and the second control module as the main control module based on the first state information and the second state information:

[0013] If both the first control module and the second control module are in duty mode, the allocation module selects the first control module as the main control module.

[0014] If both the first control module and the second control module are in an off-duty state, the allocation module selects the second control module as the main control module.

[0015] If one of the first control module and the second control module is on duty and the other is off duty, the allocation module selects either the first control module or the second control module on duty as the main control module.

[0016] According to some embodiments of the present invention, the allocation module acquires the operating status information of the power module; the allocation module transmits the operating status information to the first control module or the second control module.

[0017] According to some embodiments of the present invention, in the step of the allocation module transmitting working status information to the first control module or the second control module:

[0018] Based on the first and second status information, when both the first and second control modules are working normally, the allocation module transmits the working status information to the first or second control module that is not the main control module.

[0019] According to some embodiments of the present invention, in the step of the first control module and the second control module communicating with each other to synchronize data and control cycles:

[0020] The first or second control module, which is not the master control module, acts as the synchronization master, while the other acts as the synchronization slave. The synchronization slave receives the synchronization signal from the synchronization master and compares the synchronization signal with its own control cycle. If the deviation between the synchronization signal and the control cycle is greater than a preset threshold, the synchronization slave adjusts its own control cycle to synchronize with the synchronization signal.

[0021] According to a second aspect of the present invention, an SVG dual-machine hot standby system includes: a first control module, a second control module, an allocation module, and a plurality of power modules, wherein the first control module and the second control module are both connected to the allocation module, and the allocation module is respectively connected to the plurality of power modules.

[0022] The SVG dual-machine hot standby system according to embodiments of the present invention has at least the following beneficial effects: both the first control module and the second control module can generate control signals. The allocation module acquires the first state information of the first control module and the second state information of the second control module. Based on the first and second state information, the allocation module selects either the first or second control module as the master control module. The allocation module transmits the control signal generated by the master control module as the master control signal to the power module, enabling the power module to operate normally and achieve reactive power compensation. When maintenance is required or a fault occurs, the allocation module selects either the first or second control module that is operating normally as the master control module based on the first and second state information, ensuring that the master control signal is uninterrupted and thus the power operates continuously, which helps improve the stability of the reactive power compensation function.

[0023] According to some embodiments of the present invention, a human-computer interaction module is further included, which is communicatively connected to the first control module and the second control module respectively.

[0024] According to some embodiments of the present invention, the first control module is provided with a first control fiber optic port, the second control module is provided with a second control fiber optic port, the allocation module includes an allocation processing unit and a third control fiber optic port, a fourth control fiber optic port and a power fiber optic port group, all connected to the allocation processing unit, the first control fiber optic port is connected to the third control fiber optic port, the second control fiber optic port is connected to the fourth control fiber optic port, and the power fiber optic port group is respectively connected to a plurality of the power modules.

[0025] According to some embodiments of the present invention, the first control module is provided with a first synchronous fiber optic port, the second control module is provided with a second synchronous fiber optic port, and the first synchronous fiber optic port is connected to the second synchronous fiber optic port.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a flowchart of one embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of one embodiment of the present invention. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0032] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0033] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0034] like Figure 1 As shown, the SVG dual-machine hot standby control method according to a first aspect embodiment of the present invention includes:

[0035] The allocation module 300 acquires the first status information of the first control module 100 and the second status information of the second control module 200;

[0036] The allocation module 300 selects one of the first control module 100 and the second control module 200 as the main control module based on the first status information and the second status information;

[0037] The distribution module 300 acquires the main control signal generated by the main control module and transmits the main control signal to the power module 400.

[0038] The distribution module 300 selects either the first control module 100 or the second control module 200 as the main control module based on the first state information of the first control module 100 and the second state information of the second control module 200. The distribution module 300 then transmits the control signal generated by the main control module, i.e., the main control signal, to the power module 400, enabling the power module 400 to operate normally under the control of the main control signal and achieve reactive power compensation. When maintenance is required or a fault occurs, the distribution module 300 selects either the first control module 100 or the second control module 200 that is functioning normally as the main control module based on the first and second state information. This ensures that the main control signal is uninterrupted, thereby allowing uninterrupted power operation and improving the stability of the reactive power compensation function.

[0039] In some embodiments of the present invention, the first control module 100 and the second control module 200 communicate with each other to synchronize data and control cycles.

[0040] The first control module 100 and the second control module 200 communicate with each other to synchronize the data of the first control module 100 and the second control module 200, thus achieving the effect of mutual data backup. At the same time, the control cycle of the first control module 100 and the control cycle of the second control module 200 are synchronized, which is beneficial for the other to quickly take over the control of the power module 400 when one of them is under maintenance or malfunctions, thereby improving the response speed.

[0041] Reference Figure 1 In some embodiments of the present invention, in the step where the allocation module 300 selects one of the first control module 100 and the second control module 200 as the main control module based on the first state information and the second state information:

[0042] If both the first control module 100 and the second control module 200 are in duty mode, the allocation module 300 selects the first control module 100 as the main control module;

[0043] If both the first control module 100 and the second control module 200 are in an off-duty state, the allocation module 300 selects the second control module 200 as the main control module;

[0044] If one of the first control module 100 and the second control module 200 is on duty and the other is off duty, the allocation module 300 selects either the first control module 100 or the second control module 200 as the main control module.

[0045] Under the control of the human-machine interaction module 500, the first control module 100 and the second control module 200 can change their working status, such as being on duty or off duty.

[0046] Due to operational errors or other reasons, both the first control module 100 and the second control module 200 are set to the duty state. In order to avoid conflicts, the allocation module 300 defaults to using the first control module 100 as the master control module and transmits the control signals generated by the first control module 100 as the master control signals to the power module 400. In this way, control conflicts caused by operational errors can be avoided.

[0047] When the device is powered on and started working, the working status of the first control module 100 and the second control module 200 has not been set, that is, both the first control module 100 and the second control module 200 are in an off-duty state. By default, the distribution module 300 sets the second control module 200 as the main control module and transmits the control signal generated by the second control module 200 as the main control signal to the power module 400. In this way, it can prevent the power module 400 from missing the main control signal.

[0048] When maintenance is required, the first control module 100 or the second control module 200 to be maintained is set to off-duty status, while the other is set to on-duty status. This allows the maintenance operation to be completed without affecting the power module 400.

[0049] Through the above methods, the power module 400 can operate normally under different state combinations of the first control module 100 and the second control module 200, which helps to improve stability and reliability.

[0050] When either the first control module 100 or the second control module 200 fails, the allocation module 300 will use the normally functioning first control module 100 or the second control module 200 as the main control module, without needing to consider whether the normally functioning first control module 100 or the second control module 200 is on duty.

[0051] In some embodiments of the present invention, the allocation module 300 acquires the operating status information of the power module 400; the allocation module 300 transmits the operating status information to the first control module 100 or the second control module 200.

[0052] The power module 400 transmits its own operating status information to the distribution module 300, and the distribution module 300 transmits the operating status information to the first control module 100 or the second control module 200. The data between the first control module 100 and the second control module 200 is synchronized, which enables the main control module to control and adjust the power module 400 according to the operating status information so that the generated reactive power meets the demand.

[0053] The first control module 100 and the second control module 200 can upload working status information to the human-machine interaction module 500 so that staff can know the current working status of the power module 400 and meet the usage requirements.

[0054] In some embodiments of the present invention, in the step where the allocation module 300 transmits the working status information to the first control module 100 or the second control module 200:

[0055] Based on the first status information and the second status information, when both the first control module 100 and the second control module 200 are working normally, the allocation module 300 transmits the working status information to the first control module 100 or the second control module 200, which is not the main control module.

[0056] The first control module 100 or the second control module 200, which acts as the main control module, generates a main control signal to control the power module 400 to operate stably. The first control module 100 or the second control module 200, which does not act as the main control module, obtains working status information and can upload the working status information to the human-machine interaction module 500. This is beneficial for making full use of the processing power resources of the first control module 100 or the second control module 200, which does not act as the main control module.

[0057] When one of the first control module 100 and the second control module 200 fails to work properly, the distribution module 300 distinguishes the first control module 100 or the second control module 200 that can work properly based on the first status information and the second status information, and uses it as the main control module. At the same time, the working status information of the power module 400 is transmitted and fed back to the first control module 100 or the second control module 200 that is working properly.

[0058] In some embodiments of the present invention, in the step of the first control module 100 and the second control module 200 communicating with each other to synchronize data and control cycles:

[0059] The first control module 100 or the second control module 200, which is not the main control module, acts as the synchronization master, and the other acts as the synchronization slave. The synchronization slave receives the synchronization signal from the synchronization master and compares the synchronization signal with its own control cycle. If the deviation between the synchronization signal and the control cycle is greater than a preset threshold, the synchronization slave adjusts its own control cycle to synchronize with the synchronization signal.

[0060] The first control module 100 or the second control module 200, acting as a synchronous slave, compares the synchronization signal with its own control cycle. When the deviation value is greater than a preset threshold, the synchronous slave adjusts itself to synchronize its own control cycle with the synchronization signal. In this way, the control cycles of the first control module 100 and the second control module 200 are synchronized, realizing the step loss protection function. This is beneficial for more stable control and improved reliability during switching.

[0061] Reference Figure 2 According to a second aspect of the present invention, an SVG dual-machine hot standby system includes: a first control module 100, a second control module 200, an allocation module 300, and a plurality of power modules 400. The first control module 100 and the second control module 200 are both connected to the allocation module 300, and the allocation module 300 is connected to the plurality of power modules 400 respectively.

[0062] Both the first control module 100 and the second control module 200 can generate control signals. The distribution module 300 acquires the first state information of the first control module 100 and the second state information of the second control module 200. Based on the first and second state information, the distribution module 300 selects either the first control module 100 or the second control module 200 as the main control module. The distribution module 300 transmits the control signal generated by the main control module as the main control signal to the power module 400 so that the power module 400 can operate normally and realize the function of reactive power compensation.

[0063] When maintenance is required or a fault occurs, the distribution module 300 selects either the first control module 100 or the second control module 200 that can operate normally as the main control module based on the first and second status information. This ensures that the main control signal is uninterrupted, thereby enabling uninterrupted power operation and improving the stability of the reactive power compensation function.

[0064] The first control module 100 and the second control module 200 may be implementations that include devices or chips with control processing functions, such as DPS, FPGA, and ARM.

[0065] Reference Figure 2In some embodiments of the present invention, a human-computer interaction module 500 is also included, which is communicatively connected to the first control module 100 and the second control module 200 respectively.

[0066] The human-machine interface module 500, when operated by a staff member, generates control signals. These signals are transmitted to the first control module 100 and the second control module 200 to adjust or change their operating parameters, such as their duty status. The first control module 100 and the second control module 200 can acquire the operating status information of the power module 400 and upload this information, along with their own status information, to the human-machine interface module 500, allowing staff to understand the overall operating status and meet their needs.

[0067] The human-computer interaction module 500 can be implemented using devices such as a display, keyboard, and touch screen; the human-computer interaction module 500 can also be implemented using equipment or devices such as a computer.

[0068] Reference Figure 2 In some embodiments of the present invention, the first control module 100 is provided with a first control fiber optic port 110, the second control module 200 is provided with a second control fiber optic port 210, and the allocation module 300 includes an allocation processing unit 310 and a third control fiber optic port 320, a fourth control fiber optic port 330 and a power fiber optic port group 340, all of which are connected to the allocation processing unit 310. The first control fiber optic port 110 is connected to the third control fiber optic port 320, the second control fiber optic port 210 is connected to the fourth control fiber optic port 330, and the power fiber optic port group 340 is connected to a plurality of power modules 400 respectively.

[0069] The first control module 100 is communicatively connected to the distribution processing unit 310 through the first control fiber optic port 110 and the third control fiber optic port 320. The second control module 200 is communicatively connected to the distribution processing unit 310 through the second control fiber optic port 210 and the fourth control fiber optic port 330. Thus, the distribution processing unit 310 can know the source of the control signal based on the third control fiber optic port 320 and the fourth control fiber optic port 330, and can selectively send the operating status information of the power module 400 to the first control module 100 or the second control module 200.

[0070] The distribution module 300 is connected to multiple power modules 400 through the power fiber optic port group 340. All of them adopt the structure of fiber optic communication, which has a fast communication speed, which is conducive to improving the response speed, and the communication is more stable, which is conducive to improving reliability.

[0071] The allocation processing unit 310 can be implemented using devices such as FPGA and microcontroller.

[0072] When both the first control module 100 and the second control module 200 are on duty, the allocation processing unit 310 uses the control signal obtained from the third control fiber optic port 320 as the master control signal; when both the first control module 100 and the second control module 200 are off duty, the allocation processing unit 310 uses the control signal obtained from the fourth control fiber optic port 330 as the master control signal; when one of the first control module 100 and the second control module 200 is on duty and the other is off duty, the allocation processing unit 310 uses the control signal obtained from the third control fiber optic port 320 corresponding to the first control module 100 or the fourth control fiber optic port 330 corresponding to the second control module 200 as the master control signal.

[0073] When either the third control fiber optic port 320 or the fourth control fiber optic port 330 fails and becomes unavailable, the allocation processing unit 310 will use the first control module 100 corresponding to the normally operating third control fiber optic port 320 or the second control module 200 corresponding to the fourth control fiber optic port 330 as the main control module, without needing to consider whether the first control module 100 or the second control module 200 is on duty.

[0074] Reference Figure 2 In some embodiments of the present invention, the first control module 100 is provided with a first synchronization fiber optic port 120, and the second control module 200 is provided with a second synchronization fiber optic port 220, wherein the first synchronization fiber optic port 120 is connected to the second synchronization fiber optic port 220.

[0075] The first control module 100 communicates with the second control module 200 through the first synchronous fiber optic port 120 and the second synchronous fiber optic port 220, so that the first control module 100 and the second control module 200 can synchronize data and control cycles. The structure of the first synchronous fiber optic port 120 and the second synchronous fiber optic port 220 has the advantages of fast communication speed and high stability.

[0076] refer to Figure 2 In some embodiments of the present invention, the first control module 100 is provided with a first serial communication interface, and the second control module 200 is provided with a second serial communication interface. Both the first serial communication interface and the second serial communication interface are connected to the human-machine interaction module 500.

[0077] The first control module 100 and the second control module 200 obtain the control signals from the human-machine interaction module 500 through the first serial communication interface and the second serial communication interface, respectively, and can also upload the working status information of the power module 400 to the human-machine interaction module 500.

[0078] The serial communication interface can be implemented using devices such as RS458 interfaces.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An SVG dual-machine hot standby control method, characterized in that, Including the following steps: The allocation module (300) obtains the first status information of the first control module (100) and the second status information of the second control module (200); The allocation module (300) selects one of the first control module (100) and the second control module (200) as the main control module based on the first status information and the second status information; The distribution module (300) acquires the main control signal generated by the main control module and transmits the main control signal to the power module (400); The first control module (100) and the second control module (200) communicate with each other to synchronize data and control cycles; The distribution module (300) acquires the operating status information of the power module (400); The distribution module (300) transmits the working status information to the first control module (100) or the second control module (200); In the step where the allocation module (300) transmits the working status information to the first control module (100) or the second control module (200): According to the first status information and the second status information, when both the first control module (100) and the second control module (200) are working normally, the allocation module (300) transmits the working status information to the first control module (100) or the second control module (200) that is not the main control module. When one of the first control module (100) and the second control module (200) fails to work properly, the distribution module (300) distinguishes the first control module (100) or the second control module (200) that can work properly based on the first status information and the second status information, and uses it as the main control module. At the same time, the working status information of the power module (400) is transmitted and fed back to the working first control module (100) or the second control module (200). In the step of the first control module (100) and the second control module (200) communicating with each other to synchronize data and control cycles: The first control module (100) or the second control module (200), which is not the master control module, acts as the synchronization master, and the other acts as the synchronization slave. The synchronization slave receives the synchronization signal from the synchronization master and compares the synchronization signal with its own control cycle. If the deviation between the synchronization signal and the control cycle is greater than a preset threshold, the synchronization slave adjusts its own control cycle to synchronize with the synchronization signal.

2. The SVG dual-machine hot standby control method according to claim 1, characterized in that, In the step where the allocation module (300) selects one of the first control module (100) and the second control module (200) as the main control module based on the first status information and the second status information: If both the first control module (100) and the second control module (200) are on duty, the allocation module (300) selects the first control module (100) as the main control module; if both the first control module (100) and the second control module (200) are off duty, the allocation module (300) selects the second control module (200) as the main control module. If one of the first control module (100) and the second control module (200) is on duty and the other is off duty, the allocation module (300) selects the first control module (100) on duty or the second control module (200) on duty as the main control module.

3. An SVG dual-machine hot standby system, characterized in that, The method includes the SVG dual-machine hot standby control method as described in claim 1 or 2 and a plurality of power modules (400), wherein the distribution module (300) is connected to the plurality of power modules (400) respectively.

4. The SVG dual-machine hot standby system according to claim 3, characterized in that: It also includes a human-computer interaction module (500), which is communicatively connected to the first control module (100) and the second control module (200).

5. The SVG dual-machine hot standby system according to claim 3, characterized in that: The first control module (100) is provided with a first control fiber optic port (110), the second control module (200) is provided with a second control fiber optic port (210), and the distribution module (300) includes a distribution processing unit (310) and a third control fiber optic port (320), a fourth control fiber optic port (330) and a power fiber optic port group (340) all connected to the distribution processing unit (310). The first control fiber optic port (110) is connected to the third control fiber optic port (320), the second control fiber optic port (210) is connected to the fourth control fiber optic port (330), and the power fiber optic port group (340) is connected to multiple power modules (400) respectively.

6. The SVG dual-machine hot standby system according to claim 3, characterized in that: The first control module (100) is provided with a first synchronous fiber optic port (120), and the second control module (200) is provided with a second synchronous fiber optic port (220). The first synchronous fiber optic port (120) is connected to the second synchronous fiber optic port (220).

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