Operation state determination method and device, storage medium and electronic device

Abstract

The invention discloses an operation state determination method and device, a storage medium and an electronic device, and the method comprises the steps: obtaining a first curve according to the current operation condition of a static var generator, the first curve is a two-stage PQ curve of the active power and the reactive power of the static var generator pre-established under a target coordinate system, and the horizontal coordinate and the vertical coordinate of the target coordinate system are used for indicating one of the following: the active power and the reactive power; determining a first track and a second track respectively corresponding to the real-time active power and the real-time reactive power of the static var generator in the target coordinate system; the running state of the static var generator is determined according to the position relation between a third track and the first curve, and the third track is the track of the intersection of the first track and the second track.

Description

Technical Field

[0001] The present application relates to the technical field of new energy power generation, and in particular, to a method and device for determining an operating state, a storage medium, and an electronic device. Background Art

[0002] The main function of the Static Var Generator (SVG) equipment in a new energy power station is to achieve reactive voltage control of the power station. The SVG equipment is directly connected to the 35 kV bus of the booster station, and stabilizes the grid connection point voltage by centrally compensating reactive power. The main circuit of the SVG equipment generally consists of an inverter and an incoming line reactor, and realizes dynamic adjustment of the reactive power of the system by changing the output voltage of the inverter.

[0003] Currently, the monitoring of the operating state of the SVG mainly monitors variable values such as its operating power, voltage, and current, and the variable values are refreshed in real time on the monitoring interface. However, the monitoring of the operating power only monitors from a single dimension such as active power or reactive power, without considering the interaction relationship between active power and reactive power.

[0004] In view of the problem in the related art that the monitoring of the operating state of the static var generator only considers active power or reactive power in a single dimension, without considering the interaction relationship between active power and reactive power, no effective solution has been obtained yet. Summary of the Invention

[0005] The embodiments of the present application provide a method and device for determining an operating state, a storage medium, and an electronic device, so as to at least solve the problem in the prior art that the monitoring of the operating state of the static var generator only considers active power or reactive power in a single dimension, without considering the interaction relationship between active power and reactive power.

[0006] According to an embodiment of the embodiments of the present application, a method for determining an operating state is provided, including: obtaining a first curve according to the current operating condition of a static var generator, where the first curve is a two-level PQ curve of the active power and reactive power of the static var generator pre-established in a target coordinate system, and the abscissa and ordinate of the target coordinate system are both used to indicate one of the following: the active power, the reactive power; determining a first trajectory and a second trajectory corresponding to the real-time active power and real-time reactive power of the static var generator in the target coordinate system respectively; determining the operating state of the static var generator through the positional relationship between a third trajectory and the first curve, where the third trajectory is the trajectory of the intersection point of the first trajectory and the second trajectory.

[0007] In an exemplary embodiment, obtaining a first curve according to the current operating condition of a static var generator includes: determining a preset operating condition corresponding to the static var generator, where the preset operating condition includes: a first condition for indicating that the maximum output voltage capability of the static var generator is not limited, and a second condition for indicating that the maximum output voltage capability of the static var generator is limited; when the current operating condition is the first condition, determining the second curve corresponding to the first condition as the first curve, where the second curve is a two-level PQ curve of the active power and reactive power of the static var generator pre-established in a target coordinate system for the static var generator in the first condition; when the current operating condition is the second condition, determining the third curve corresponding to the second condition as the first curve, where the third curve is a two-level PQ curve of the active power and reactive power of the static var generator pre-established in a target coordinate system for the static var generator in the second condition.

[0008] In an exemplary embodiment, before obtaining the first curve according to the current operating condition of the static var generator, the method further includes: establishing an operating PQ curve of the static var generator; and respectively establishing a first alarm PQ curve and a second alarm PQ curve, where the first alarm PQ curve is the alarm PQ curve of the static var generator in the first condition, and the second alarm PQ curve is the alarm PQ curve of the static var generator in the second condition; determining the second curve through the operating PQ curve and the first alarm PQ curve, and determining the third curve through the operating PQ curve and the second alarm PQ curve.

[0009] In an exemplary embodiment, establishing the operating PQ curve of the static var generator includes: determining the reactive power operating limit of the static var generator; and determining the active power loss of the static var generator; determining the operating PQ curve through the reactive power operating limit and the active power loss.

[0010] In an exemplary embodiment, respectively establishing the first alarm PQ curve and the second alarm PQ curve includes: determining the per-unit value of the maximum current and the maximum reactive power of the static var generator; establishing the first alarm PQ curve through the per-unit value of the maximum current; and establishing the second alarm PQ curve through the per-unit value of the maximum current and the maximum reactive power.

[0011] In an exemplary embodiment, determining the operating state of the static var generator based on the positional relationship between a third locus and the first curve includes: when it is determined that the third locus is within a first range defined by the inner curve of the two-level PQ curve, determining that the operating state of the static var generator is a safe operating state; when it is determined that the third locus is outside a second range defined by the outer curve of the two-level PQ curve, determining that the operating state of the static var generator is an operating state to be repaired.

[0012] According to another embodiment of the embodiments of the present application, there is also provided a device for determining an operating state, including: an acquisition module configured to acquire a first curve according to the current operating condition of a static var generator, where the first curve is a two-level PQ curve of the active power and reactive power of the static var generator pre-established in a target coordinate system, and the abscissa and ordinate of the target coordinate system are both used to indicate one of the following: the active power, the reactive power; a first determination module configured to determine a first locus and a second locus corresponding to the real-time active power and real-time reactive power of the static var generator in the target coordinate system respectively; a second determination module configured to determine the operating state of the static var generator based on the positional relationship between a third locus and the first curve, where the third locus is the locus of the intersection point of the first locus and the second locus.

[0013] According to yet another aspect of the embodiments of the present application, there is also provided a computer-readable storage medium storing a computer program, where the computer program is configured to execute the above method when running.

[0014] According to yet another aspect of the embodiments of the present application, there is also provided an electronic device including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the above processor executes the above method through the computer program.

[0015] According to yet another aspect of the embodiments of the present application, there is also provided a computer program product including a computer program, where the steps in any of the above method embodiments are implemented when the computer program is executed by a processor.

[0016] In an embodiment of the present application, a first curve is obtained according to the current operating condition of a static var generator. The first curve is a two-level PQ curve of the active power and reactive power of the static var generator established in advance in a target coordinate system. The abscissa and ordinate of the target coordinate system are both used to indicate one of the following: the active power, the reactive power. Determine a first trajectory and a second trajectory corresponding to the real-time active power and real-time reactive power of the static var generator in the target coordinate system respectively. Determine the operating state of the static var generator through the positional relationship between a third trajectory and the first curve, where the third trajectory is the trajectory of the intersection point of the first trajectory and the second trajectory. Through the above embodiment, the problem in the prior art that the monitoring of the operating state of the static var generator only considers a single dimension of active power or reactive power and does not consider the interaction relationship between active power and reactive power is solved. Thus, the interaction relationship between active power and reactive power is considered in the process of monitoring the operating state of the static var generator, making the monitoring result of the operating state more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0018] Figure 1 is a hardware structure block diagram of a computer terminal for a method of determining an operating state according to an embodiment of the present application;

[0019] Figure 2 is a flowchart of a method of determining an operating state according to an embodiment of the present application;

[0020] Figure 3 is a schematic diagram of a two-level PQ curve (I) of a method of determining an operating state according to an embodiment of the present application;

[0021] Figure 4 is a schematic diagram of a two-level PQ curve (II) of a method of determining an operating state according to an embodiment of the present application;

[0022] Figure 5 is a basic schematic diagram of SVG according to a method of determining an operating state according to an embodiment of the present application;

[0023] Figure 6 is a schematic diagram of an SVG power oscillation trajectory according to a method of determining an operating state according to an embodiment of the present application;

[0024] Figure 7 is a structure block diagram of a device for determining an operating state according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To enable those skilled in the art to better understand the solution of this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned accompanying drawings are used to distinguish similar objects, and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such data used can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices; "plural" means two or more.

[0027] The method embodiments provided in the embodiments of this application can be executed on a computer terminal or a similar computing device or cloud platform or an independent physical server or software platform. Among them, the above-mentioned software platform runs through one or more servers. Taking running on a computer terminal as an example, Figure 1 is a hardware structure block diagram of a computer terminal for a method of determining an operating state of an embodiment of this application. As Figure 1 shown, the computer terminal may include one or more ( Figure 1 only one is shown in Figure 1 shown) processors 102 and a memory 104 for storing data. In an exemplary embodiment, the above-mentioned computer terminal may further include a transmission device 106 for communication functions and an input / output device 108. Among them, the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA. Those of ordinary skill in the art can understand that, Figure 1 the structure shown in Figure 1 is only schematic and does not limit the structure of the above-mentioned computer terminal. For example, the computer terminal may further include more or fewer components than those shown in Figure 1 shown, or have an equivalent function to that shown in

[0028] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the method in the embodiments of the present application. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above-mentioned method is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memories. In some instances, the memory 104 may further include a memory remotely disposed relative to the processor 102, and these remote memories can be connected to the computer terminal through a network. Examples of the above-mentioned network include but are not limited to the Internet, intranet, local area network, mobile communication network, and combinations thereof.

[0029] The transmission device 106 is used to receive or send data via a network. Specific examples of the above-mentioned network may include a wireless network provided by a communication provider of the computer terminal. In one instance, the transmission device 106 includes a network adapter (abbreviated as NIC), which can be connected to other network devices through a base station and thus communicate with the Internet. In one instance, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0030] In this embodiment, a method for determining the operating state is provided, which is applied to the above computer terminal. Figure 2 It is a flowchart of the method for determining the operating state according to the embodiments of the present application. The process includes the following steps:

[0031] Step S202, obtain a first curve according to the current operating condition of the static var generator, where the first curve is a two-level PQ curve of the active power and reactive power of the static var generator pre-established in a target coordinate system, and the abscissa and ordinate of the target coordinate system are both used to indicate one of the following: the active power, the reactive power;

[0032] Step S204, determine a first trajectory and a second trajectory corresponding to the real-time active power and real-time reactive power of the static var generator in the target coordinate system respectively;

[0033] It should be noted that the above step S202 and step S204 can be executed simultaneously, or step S202 is executed before step S204, or step S202 is executed after step S204. The embodiments of the present application do not limit this.

[0034] Step S206: Determine the operating state of the static var generator based on the positional relationship between the third locus and the first curve, where the third locus is the locus of the intersection points of the first locus and the second locus.

[0035] In an embodiment of the present application, obtain a first curve according to the current operating condition of the static var generator, where the first curve is a two-level PQ curve of the active power and reactive power of the static var generator established in advance in a target coordinate system, and the abscissa and ordinate of the target coordinate system are both used to indicate one of the following: the active power, the reactive power; determine the first locus and the second locus corresponding to the real-time active power and real-time reactive power of the static var generator in the target coordinate system respectively; determine the operating state of the static var generator based on the positional relationship between the third locus and the first curve, where the third locus is the locus of the intersection points of the first locus and the second locus. Through the above embodiments, the problem in the prior art that the monitoring of the operating state of the static var generator only considers a single dimension of active power or reactive power and does not consider the interaction relationship between active power and reactive power is solved, so that the interaction relationship between active power and reactive power is considered in the process of monitoring the operating state of the static var generator, making the monitoring result of the operating state more accurate.

[0036] In an exemplary embodiment, obtaining a first curve according to the current operating condition of the static var generator includes: determining the preset operating condition corresponding to the static var generator, where the preset operating condition includes: a first condition for indicating that the maximum output voltage capacity of the static var generator is not limited, and a second condition for indicating that the maximum output voltage capacity of the static var generator is limited; when the current operating condition is the first condition, determine the second curve corresponding to the first condition as the first curve, where the second curve is a two-level PQ curve of the active power and reactive power of the static var generator established in advance in the target coordinate system for the static var generator in the first condition; when the current operating condition is the second condition, determine the third curve corresponding to the second condition as the first curve, where the third curve is a two-level PQ curve of the active power and reactive power of the static var generator established in advance in the target coordinate system for the static var generator in the second condition.

[0037] When the maximum output voltage capacity of the static var generator is not limited, that is, the maximum output voltage capacity of the static var generator is large enough, the obtained second curve is as Figure 3 shown; the third curve corresponding to the limited maximum output voltage capacity of the static var generator is as Figure 4 shown.

[0038] In some embodiments, before obtaining the first curve according to the current operating condition of the static var generator, the method further includes: establishing an operating PQ curve of the static var generator; and respectively establishing a first alarm PQ curve and a second alarm PQ curve, wherein the first alarm PQ curve is the alarm PQ curve of the static var generator under the first condition, and the second alarm PQ curve is the alarm PQ curve of the static var generator under the second condition; determining the second curve through the operating PQ curve and the first alarm PQ curve, and determining the third curve through the operating PQ curve and the second alarm PQ curve.

[0039] It should be noted that Figure 3 and Figure 4 If it is established in a two-dimensional PQ coordinate system (equivalent to the target coordinate system in the above embodiments), the abscissa of the target coordinate system is used to indicate the per-unit value of reactive power Q, and the ordinate of the target coordinate system is used to indicate the per-unit value of active power P. In Figure 3 and Figure 4 , O is the origin of the coordinate system, and any power operating point E0 of the SVG will be presented in this coordinate system.

[0040] The operating PQ curve is as shown by curve 12341 in Figure 3 or Figure 4 . The first alarm PQ curve is as shown by curve abca in Figure 3 , and the second alarm PQ curve is as shown by curve abcda in Figure 4 .

[0041] Furthermore, establishing the operating PQ curve of the static var generator includes: determining the reactive power operation limit of the static var generator; and determining the active power loss of the static var generator; determining the operating PQ curve through the reactive power operation limit and the active power loss.

[0042] It can be understood that the reactive power operation limit is as shown by curves 12 and 34 in Figure 3 or Figure 4 . Curves 12 and 34 are respectively the rated reactive power ±Q N of the SVG. Curve 23 is the active power loss of the SVG. Curve 41 is the minimum active power consumption. Thus, the operating PQ curve is determined through curves 12, 34, 23, and 41. It should be noted that when the SVG operates normally, its power operating points all fall within the range of curve 12341.

[0043] In an exemplary embodiment, establishing a first alarm PQ curve and a second alarm PQ curve respectively includes: determining the per-unit value of the maximum current and the maximum reactive power of the static var generator; establishing the first alarm PQ curve through the per-unit value of the maximum current; and establishing the second alarm PQ curve through the per-unit value of the maximum current and the maximum reactive power.

[0044] When the output voltage of the static var generator satisfies being less than the maximum output voltage of the static var generator, the first alarm PQ curve is a semi-circular arc with the per-unit value of the maximum current of the SVG as the radius and point O as the center (generally, the maximum per-unit value of the current is 1.1), that is, curve abca.

[0045] When the output voltage of the static var generator does not satisfy being less than the maximum output voltage of the static var generator, the alarm power PQ curve is the intersection part of a semi-circular arc with the per-unit value of the maximum current of the SVG as the radius and point O as the center (generally, the maximum per-unit value of the current is 1.1) and the maximum reactive power Q max That is, curve abcda.

[0046] In an exemplary embodiment, determining the operating state of the static var generator through the positional relationship between a third locus and the first curve includes: when determining that the third locus is within a first range defined by the inner curve of the two-level PQ curve, determining the operating state of the static var generator as a safe operating state; when determining that the third locus is outside a second range defined by the outer curve of the two-level PQ curve, determining the operating state of the static var generator as an operating state to be overhauled.

[0047] In some alternative embodiments, when an oscillation event occurs in the system where the static var generator is located, determining the first range defined by the third locus at the current moment, where the oscillation event includes one of the following: subsynchronous oscillation, supersynchronous oscillation;

[0048] Determining the second range defined by the third locus at the next moment of the current moment;

[0049] When the first range is greater than the second range, determining that the operating state is oscillation control convergence;

[0050] When the first range is less than the second range, determining that the operating state is oscillation control divergence.

[0051] To better understand the process of the above method for determining the operating state, the above method for determining the operating state will be further described below in combination with alternative embodiments, but it is not used to limit the technical solutions of the embodiments of the present application.

[0052] To overcome the deficiencies in the related art, an embodiment of the present application proposes a method for monitoring the operating state of SVG (equivalent to the method for determining the operating state in the above embodiment) to make up for the deficiency that the monitoring interface in the related technical solution only displays data points in a single dimension. The method for monitoring the operating state of SVG determines the operating state of SVG visually by establishing a two-level PQ curve of SVG and graphically displaying the active and reactive power operating curves.

[0053] A method for monitoring the operating state of SVG in an embodiment of the present application includes:

[0054] (1) The first case: The maximum output voltage capacity of SVG is large enough.

[0055] First, establish a two-dimensional PQ coordinate system with O as the origin of the coordinate system, the abscissa being the per-unit value Q of reactive power, and the ordinate being the per-unit value P of active power. Then, any power operating point E0 of SVG will be presented in this coordinate system.

[0056] Draw a perpendicular line E0M to the Q-axis with E0 as the starting point. The perpendicular line E0M represents the value of active power. The line segment OM represents the value of reactive power. The line segment OE0 represents the per-unit value S of the apparent power output by the current SVG.

[0057] When the M point is on the right side of the O point, SVG delivers inductive reactive power to the power grid. When the M point coincides with the O point, the inductive reactive power delivered by SVG to the power grid is 0. When the M point is on the left side of the O point, SVG delivers capacitive reactive power to the power grid.

[0058] Secondly, establish the two-level PQ curve of SVG as shown in Figure 3 . The two-level PQ curve of SVG for the case where the maximum output voltage capacity of SVG is large enough includes an operating PQ curve 12341 and an alarm PQ curve.

[0059] Among them, determining the operating PQ curve 12341 includes:

[0060] Reactive power operation limit: curves 12 and 34;

[0061] Curves 12 and 34 are respectively ±QN of the rated reactive power of SVG;

[0062] Curve 23 is the active power loss of SVG;

[0063] Curve 41 is the minimum active power consumption.

[0064] It should be noted that when SVG operates normally, its power operating points all fall within the range of curve 12341.

[0065] Among them, determining the alarm PQ curve includes:

[0066] Determine the maximum output voltage U of the SVG out :

[0067]

[0068] In formula (1), U dc is the DC link bus voltage, and k is the turns ratio of the step-up transformer equipped with the SVG.

[0069] Furthermore, the SVG is connected to the power grid through an incoming line reactor. Ignoring the resistance of the incoming line reactor and the system reactance, the schematic diagram is as shown in Figure 5 In Figure 5 , U g is the output voltage of the SVG; I g is the output current of the SVG; X L is the incoming line reactor; U s is the system voltage. Then the output voltage of the SVG:

[0070]

[0071] When U g <U out is satisfied, the alarm PQ curve is a semi-circular arc with the per-unit value of the maximum current of the SVG as the radius and point O as the center (generally, the maximum per-unit value of the current is 1.1), that is, the curve abca.

[0072] (2) The second case: The maximum output voltage capacity of the SVG is limited.

[0073] The operating PQ curve in the second case is the same as that in the first case.

[0074] Establish the alarm PQ curve for the second case, including:

[0075] At this time, U g <U out is not satisfied, and the maximum output reactive power capacity of the SVG will be limited.

[0076] At this time, the maximum reactive power Q max :

[0077]

[0078] The alarm power PQ curve is the intersecting part of a semi-circular arc with the per-unit value of the maximum current of the SVG as the radius and point O as the center (generally, the maximum per-unit value of the current is 1.1) and the maximum reactive power Q max , that is, the curve abcda.

[0079] Furthermore, when sub / super-synchronous oscillations occur in the system, the active power and reactive power output by the SVG also oscillate. In a short period of time (in seconds), the trajectory E0 of the SVG power operating point will be asFigure 6 as shown

[0080] By observing the movement trajectory (red line) of the power operation point E0 on the monitoring interface, it is possible to intuitively judge whether the operation state of the SVG is normal. The speed of the movement trajectory of point E0 is proportional to the system oscillation period. When seeing that the movement trajectory gradually increases from small, it can be judged that the operation state of the SVG is divergent in oscillation control. When seeing that the movement trajectory gradually decreases from large, it can be judged that the operation state of the SVG is convergent in oscillation control.

[0081] Optionally, for unified display in the monitoring interface, the absolute value is taken for the active power consumption of the SVG. Optionally, when it is detected that the power operation point of the SVG is between the operation QP curve and the alarm QP curve, the monitoring interface graph prompts the maintenance personnel with color A. When it is detected that the power operation point of the SVG is outside the alarm QP curve, an alarm signal is issued, and at the same time, the monitoring interface graph prompts the maintenance personnel with color B.

[0082] In summary, the embodiment of the present application establishes two-level QP curves according to the typical operation conditions of the SVG, namely the operation QP curve and the alarm QP curve. Specifically, the boundary of the operation QP curve is obtained through the calculation method of the active and reactive power limits of the normal operation of the SVG, and the boundary range of the alarm QP curve of the SVG is also provided. Furthermore, based on the two-level QP curves, the expression form of the trajectory E0 of the power operation point of the SVG under the system oscillation condition is given. By observing the movement trajectory of the power operation point E0 on the monitoring interface, it is possible to intuitively judge whether the operation state of the SVG is normal.

[0083] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases, the former is a better implementation method. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc), and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of the various embodiments of the present application.

[0084] In the embodiment of the present application, a structural block diagram of a device for determining the operation state is also provided Figure 7 is the structural block diagram of the device for determining the operation state according to the embodiment of the present application; as Figure 7 shown, it includes

[0085] An acquisition module 72, configured to obtain a first curve according to the current operating condition of the static var generator, where the first curve is a two-level PQ curve of the active power and reactive power of the static var generator pre-established in a target coordinate system, and the abscissa and ordinate of the target coordinate system are both used to indicate one of the following: the active power, the reactive power;

[0086] A first determination module 74, configured to determine a first trajectory and a second trajectory corresponding to the real-time active power and real-time reactive power of the static var generator in the target coordinate system respectively;

[0087] A second determination module 76, configured to determine the operating state of the static var generator according to the positional relationship between a third trajectory and the first curve, where the third trajectory is the trajectory of the intersection point of the first trajectory and the second trajectory.

[0088] Through the above device, a first curve is obtained according to the current operating condition of the static var generator, where the first curve is a two-level PQ curve of the active power and reactive power of the static var generator pre-established in a target coordinate system, and the abscissa and ordinate of the target coordinate system are both used to indicate one of the following: the active power, the reactive power; the first trajectory and the second trajectory corresponding to the real-time active power and real-time reactive power of the static var generator in the target coordinate system are determined respectively; the operating state of the static var generator is determined according to the positional relationship between a third trajectory and the first curve, where the third trajectory is the trajectory of the intersection point of the first trajectory and the second trajectory. Through the above embodiments, the problem in the prior art that the monitoring of the operating state of the static var generator only considers a single dimension of active power or reactive power and does not consider the interaction relationship between active power and reactive power is solved, so that the interaction relationship between active power and reactive power is considered in the process of monitoring the operating state of the static var generator, making the monitoring result of the operating state more accurate.

[0089] In an exemplary embodiment, the obtaining module 72 is further configured to: determine a preset operating condition corresponding to the static var generator, where the preset operating condition includes: a first condition for indicating that the maximum output voltage capability of the static var generator is not limited, and a second condition for indicating that the maximum output voltage capability of the static var generator is limited; when the current operating condition is the first condition, determine the second curve corresponding to the first condition as the first curve, where the second curve is a two-level PQ curve of the active power and reactive power of the static var generator established in advance in a target coordinate system for the static var generator in the first condition; when the current operating condition is the second condition, determine the third curve corresponding to the second condition as the first curve, where the third curve is a two-level PQ curve of the active power and reactive power of the static var generator established in advance in a target coordinate system for the static var generator in the second condition.

[0090] In an exemplary embodiment, before obtaining the first curve according to the current operating condition of the static var generator, the apparatus further includes a third determining module, configured to: establish an operating PQ curve of the static var generator; and establish a first alarm PQ curve and a second alarm PQ curve respectively, where the first alarm PQ curve is the alarm PQ curve of the static var generator in the first condition, and the second alarm PQ curve is the alarm PQ curve of the static var generator in the second condition; determine the second curve through the operating PQ curve and the first alarm PQ curve, and determine the third curve through the operating PQ curve and the second alarm PQ curve.

[0091] In an exemplary embodiment, the third determining module is further configured to: determine the reactive power operation limit value of the static var generator; and determine the active power loss of the static var generator; determine the operating PQ curve through the reactive power operation limit value and the active power loss.

[0092] In an exemplary embodiment, the third determining module is further configured to: determine the per-unit value of the maximum current and the maximum reactive power of the static var generator; establish the first alarm PQ curve through the per-unit value of the maximum current; and establish the second alarm PQ curve through the per-unit value of the maximum current and the maximum reactive power.

[0093] In an exemplary embodiment, the second determination module 76 is further configured to: when it is determined that the third trajectory is within a first range defined by the inner curve of the two-level PQ curve, determine that the operating state of the static var generator is a safe operating state; when it is determined that the third trajectory is outside a second range defined by the outer curve of the two-level PQ curve, determine that the operating state of the static var generator is an operating state to be overhauled.

[0094] An embodiment of the present application also provides a storage medium, which includes a stored program. When the above program runs, it executes the method of any one of the above.

[0095] Optionally, in this embodiment, the above storage medium may be set to store program codes for performing the following steps:

[0096] S1. Obtain a first curve according to the current operating condition of the static var generator, where the first curve is a two-level PQ curve of the active power and reactive power of the static var generator established in advance in a target coordinate system, and the abscissa and ordinate of the target coordinate system are both used to indicate one of the following: the active power, the reactive power;

[0097] S2. Determine a first trajectory and a second trajectory respectively corresponding to the real-time active power and real-time reactive power of the static var generator in the target coordinate system;

[0098] S3. Determine the operating state of the static var generator through the positional relationship between a third trajectory and the first curve, where the third trajectory is the trajectory of the intersection point of the first trajectory and the second trajectory.

[0099] An embodiment of the present application also provides an electronic device, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0100] Optionally, the above electronic device may further include a transmission device and an input / output device, where the transmission device is connected to the above processor, and the input / output device is connected to the above processor.

[0101] Optionally, in this embodiment, the above processor may be configured to execute the following steps through a computer program:

[0102] S1. Obtain a first curve according to the current operating condition of the static var generator, where the first curve is a two-level PQ curve of the active power and reactive power of the static var generator established in advance in a target coordinate system, and the abscissa and ordinate of the target coordinate system are both used to indicate one of the following: the active power, the reactive power;

[0103] S2. Determine a first trajectory and a second trajectory corresponding to the real-time active power and the real-time reactive power of the static var generator in the target coordinate system respectively;

[0104] S3. Determine the operating state of the static var generator according to the positional relationship between a third trajectory and the first curve, where the third trajectory is the trajectory of the intersection point of the first trajectory and the second trajectory.

[0105] Optionally, in this embodiment, the above storage medium may include, but is not limited to: various media such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk, or an optical disc that can store program codes.

[0106] An embodiment of the present application further provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the steps in any one of the above method embodiments are implemented.

[0107] Another embodiment of the present application further provides a computer program product, including a non-volatile computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the steps in any one of the above method embodiments are implemented.

[0108] An embodiment of the present application further provides a computer program. The computer program includes computer instructions stored in a computer-readable storage medium; a processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the steps in any one of the above method embodiments.

[0109] Optionally, specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and will not be repeated here.

[0110] Obviously, those skilled in the art should understand that the various modules or steps of the present application described above can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. Optionally, they can be implemented by program codes executable by the computing device. Thus, they can be stored in a storage device and executed by the computing device. And in some cases, the steps shown or described can be executed in a sequence different from that here, or they can be separately fabricated into individual integrated circuit modules, or multiple modules or steps among them can be fabricated into a single integrated circuit module for implementation. In this way, the present application is not limited to any specific combination of hardware and software.

[0111] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the principle of the present application shall be included within the protection scope of the present application.

Claims

1. A method for determining an operating state, characterized in that Including: Obtain a first curve according to the current operating condition of the static var generator, where the first curve is a two-stage PQ curve of the active power and reactive power of the static var generator pre-established in a target coordinate system, and the abscissa and ordinate of the target coordinate system are both used to indicate one of the following: the active power, the reactive power; Determine a first trajectory and a second trajectory corresponding to the real-time active power and real-time reactive power of the static var generator in the target coordinate system respectively; Determine the operating state of the static var generator through the positional relationship between a third trajectory and the first curve, where the third trajectory is the trajectory of the intersection point of the first trajectory and the second trajectory.

2. The method for determining the operating state according to claim 1, wherein Obtaining a first curve according to the current operating condition of the static var generator includes: Determine a preset operating condition corresponding to the static var generator, where the preset operating condition includes: a first condition for indicating that the maximum output voltage capability of the static var generator is not limited, and a second condition for indicating that the maximum output voltage capability of the static var generator is limited; When the current operating condition is the first condition, determine the second curve corresponding to the first condition as the first curve, where the second curve is a two-stage PQ curve of the active power and reactive power of the static var generator pre-established in the target coordinate system for the static var generator in the first condition; When the current operating condition is the second condition, determine the third curve corresponding to the second condition as the first curve, where the third curve is a two-stage PQ curve of the active power and reactive power of the static var generator pre-established in the target coordinate system for the static var generator in the second condition.

3. The method for determining the operating state according to claim 2, wherein Before obtaining the first curve according to the current operating condition of the static var generator, the method further includes: Establish the operating PQ curve of the static var generator; and Respectively establish a first alarm PQ curve and a second alarm PQ curve, where the first alarm PQ curve is the alarm PQ curve of the static var generator in the first condition, and the second alarm PQ curve is the alarm PQ curve of the static var generator in the second condition; Determine the second curve through the operating PQ curve and the first alarm PQ curve, and determine the third curve through the operating PQ curve and the second alarm PQ curve.

4. The method for determining the operating state according to claim 3, characterized in that, Establishing the operating PQ curve of the static var generator includes: Determine the reactive power operating limit of the static var generator; and Determine the active power loss of the static var generator; Determine the operating PQ curve through the reactive power operating limit and the active power loss.

5. The method for determining the operating state according to claim 3, wherein Respectively establishing a first alarm PQ curve and a second alarm PQ curve includes: Determine the maximum per-unit value of current and the maximum reactive power of the static var generator; Establish the first alarm PQ curve through the maximum per-unit value of current; and Establish the second alarm PQ curve through the maximum per-unit value of current and the maximum reactive power.

6. The method for determining the operating state according to claim 3, characterized in that, Determining the operating state of the static var generator based on the positional relationship between the third locus and the first curve includes: When it is determined that the third locus is within the first range defined by the inner curve of the two-level PQ curve, determining that the operating state of the static var generator is a safe operating state; When it is determined that the third locus is outside the second range defined by the outer curve of the two-level PQ curve, determining that the operating state of the static var generator is an operating state to be overhauled.

7. A determining device for an operating state, characterized in that, Including: An acquisition module for acquiring a first curve according to the current operating conditions of the static var generator, where the first curve is a two-level PQ curve of the active power and reactive power of the static var generator pre-established in a target coordinate system, and the abscissa and ordinate of the target coordinate system are both used to indicate one of the following: the active power, the reactive power; A first determination module for determining the first locus and the second locus respectively corresponding to the real-time active power and the real-time reactive power of the static var generator in the target coordinate system; A second determination module for determining the operating state of the static var generator through the positional relationship between the third locus and the first curve, where the third locus is the locus of the intersection point of the first locus and the second locus.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, where the program, when running, executes the method described in any one of claims 1 to 6 above.

9. An electronic device, comprising a memory and a processor, characterized in that, A computer program is stored in the memory, and the processor is configured to execute the method described in any one of claims 1 to 6 through the computer program.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, the steps of the method described in any one of claims 1 to 6 are implemented.

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