A method and storage medium for voltage and reactive power control and regulation under a large-scale power generation and small-scale grid operation.

Abstract

This application proposes a voltage and reactive power control and regulation method and storage medium for a large generator-small grid system. The method includes: determining the generating state of each generator set and the operating state of each reactor; if at least one generator set is generating and the terminal current value of all generator sets is less than a first preset current or the terminal active power value is less than a first preset active power, and all reactors are in a shutdown state, and the bus voltage is greater than a first preset voltage, controlling the circuit breaker at the output of the first reactor to close, and connecting the first reactor to the power system; if at least one generator set is generating and the terminal current value of all generator sets is less than the first preset voltage or the terminal active power value is less than a first preset active power, and the first reactor is in an operating state while the remaining reactors are in a shutdown state, and the bus voltage is greater than a first preset voltage, controlling the circuit breaker at the output of the second reactor to close, and connecting the second reactor to the power system.

Description

Technical Field

[0001] This application relates to the field of power system and automation control technology, and in particular to a voltage and reactive power control and regulation method and storage medium for a large-scale generator-small-scale power grid. Background Technology

[0002] In Cambodia's power grid environment, characterized by large-scale mechanization and small-scale distribution, the grid situation is quite complex. The Cambodian power grid has its own unique characteristics, such as the distribution of maximum voltage levels and the composition of power sources. Taking the Lower Sesan 2 Hydropower Station as an example, numerous problems have been exposed during its operation.

[0003] During the dry season, the power station's output is low, and its transmission lines have significant distributed capacitance, resulting in a large amount of excess reactive power and causing the power frequency voltage at the line terminals to rise. The generator units of the Sanhe II Hydropower Station operate in a leading-phase state for extended periods. Monitoring data from the power plant shows that this leading-phase operation occurs from December to July of the following year, with a deeper leading-phase effect from December to April and a shallower effect from May to July. This leading-phase operation is to maintain the voltage of the Sanhe high-voltage busbar within limits, as the Sanhe-Upper Ding and Sanhe-Ratanakiri lines are transmitting reactive power to the Sanhe high-voltage busbar during this period.

[0004] To ensure stable system operation, hydro-generator units have often been forced to operate under deeply advanced phase conditions for many years, which has adversely affected the lifespan of the units. To ensure that the system voltage remains stable within a certain range (such as below 240kV), multiple units often operate simultaneously under advanced phase conditions. During the dry season, due to low water inflow, the units can only operate at low loads, which not only leads to low water energy utilization but also low operating efficiency of the hydro-generators.

[0005] When the leading phase of a hydro-generator unit is too deep, the generator's no-load potential decreases as the excitation current decreases, and the operating power angle increases, reducing the generator's stability margin and making it prone to entering a dangerous region of unstable operation. Furthermore, the generator absorbs reactive power from the system during leading phase operation, causing a drop in system voltage. If the system capacity is small or the reactive power reserve is insufficient, this will disrupt the stable operation between the system and the generator. Simultaneously, during deep leading phase operation, the stator end leakage flux change ratio increases, leading to severe end heating and a continuous rise in the generator stator coil temperature. On the other hand, it also causes a decrease in generator terminal voltage, resulting in a corresponding drop in plant auxiliary power voltage, directly affecting the normal operation of electrical equipment within the plant.

[0006] Furthermore, currently, reactors are manually connected / disconnected remotely or locally during operation, without automatic connection / disconnection functions, and they also lack the ability to analyze and process reactive power data from the lines. This is a significant deficiency when dealing with the complex reactive power control and regulation of the power grid. Summary of the Invention

[0007] This application aims to at least partially address one of the technical problems in the related art.

[0008] Therefore, the first objective of this application is to propose a method for voltage and reactive power control and regulation under a large-scale generator-small-scale grid system.

[0009] The second objective of this application is to propose a voltage and reactive power control and regulation device for a large-scale power plant with a small grid.

[0010] The third objective of this application is to propose an electronic device.

[0011] The fourth objective of this application is to provide a computer-readable storage medium.

[0012] The fifth objective of this application is to provide a computer program product.

[0013] To achieve the above objectives, the first aspect of this application proposes a method for voltage and reactive power control and regulation under a large-scale generator-small-scale power grid system, comprising:

[0014] Determine the power generation status of each generator set and the operational status of each reactor;

[0015] If at least one generator set is in generating state and the terminal current value of all generator sets is less than the first preset current or the terminal active power value is less than the first preset active power, and all reactors are in shutdown state, and the bus voltage is greater than the first preset voltage, control the circuit breaker of the first reactor output to close and connect the first reactor to the power system.

[0016] If at least one generator set is in generating state and the terminal current value of all generator sets is less than the first preset voltage or the terminal active power value is less than the first preset active power, and the first reactor is in operation state while the other reactors are in shutdown state, and the bus voltage is greater than the first preset voltage, control the second reactor output circuit breaker to close and connect the second reactor to the power system.

[0017] Optionally, determining the power generation status of each generator set includes:

[0018] Collect the terminal current value, active power value, output circuit breaker location, and main transformer high-voltage side circuit breaker location of each generator set.

[0019] If the terminal current of a generator set is greater than the second preset current, and the generator set's output circuit breaker is in the closed position and the main transformer's high-voltage side circuit breaker is in the closed position, the generator set is determined to be in generating state; or, if the generator set's terminal active power is greater than the second preset active power, and the generator set's output circuit breaker is in the closed position and the main transformer's high-voltage side circuit breaker is in the closed position, the generator set is determined to be in generating state.

[0020] Otherwise, the generator set is determined to be in a shutdown state.

[0021] Optionally, determining the operating status of each reactor includes:

[0022] Collect the reactive power values ​​of each reactor and the location of the output circuit breaker;

[0023] If the reactive power value of a certain reactor is greater than the first preset reactive power and the circuit breaker at the reactor outlet is in the closed position, the reactor is determined to be in operation.

[0024] Otherwise, the reactor is determined to be in a shutdown state.

[0025] Optional, also includes:

[0026] If at least one generator set is in generating mode, and the terminal current value of all generator sets is less than the first preset voltage or the terminal active power value is less than the first preset active power, and the first reactor is in operation or the second reactor is in operation, and the number of generator sets in generating mode is greater than the preset number, and the bus voltage is greater than the second preset voltage, a generator set shutdown signal is issued to remind the on-duty operator to apply to the dispatcher to shut down the excess idle generator sets in order to reduce the generator set water consumption rate.

[0027] To achieve the above objectives, a second aspect of this application provides a voltage and reactive power control and regulation device for a large-scale power plant with a small grid, comprising:

[0028] The status confirmation module is used to determine the power generation status of each generator set and the commissioning status of each reactor;

[0029] The first input module controls the first reactor output circuit breaker to close if at least one generator set is in generating state and the generator terminal current value of all generator sets is less than the first preset current or the generator terminal active power value is less than the first preset active power, and all reactors are in shutdown state and the bus voltage is greater than the first preset voltage, in order to connect the first reactor to the power system.

[0030] The second input module is used to control the second reactor output circuit breaker to close and connect the second reactor to the power system if at least one generator set is in generating state and the terminal current value of all generator sets is less than the first preset voltage or the terminal active power value is less than the first preset active power, and the first reactor is in operation state while the other reactors are in shutdown state, and the bus voltage is greater than the first preset voltage.

[0031] To achieve the above objectives, a third aspect of this application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0032] The memory stores computer-executed instructions;

[0033] The processor executes computer execution instructions stored in the memory to implement the method as described in any one of the first aspects.

[0034] To achieve the above objectives, a fourth aspect of this application provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, are used to implement the method as described in any one of the first aspects.

[0035] To achieve the above objectives, a fifth aspect of this application provides a computer program product that, when executed by a processor, implements the method described in any one of the first aspects.

[0036] This application provides a voltage and reactive power control and regulation method, device, electronic equipment, and storage medium for large-scale generator sets and small-scale power grids. It enables real-time status monitoring and intelligent regulation of generator sets and reactors, avoiding deep phase-advancing operation of generator sets under low load conditions, thereby improving unit operating efficiency and lifespan. Simultaneously, based on changes in system voltage and generation status, the monitoring system automatically issues control commands, such as closing commands for reactor output circuit breakers, flexibly connecting or disconnecting reactors, achieving automated control, reducing human intervention, improving response speed and system stability, enhancing the system's reactive power regulation capability, and ensuring bus voltage stability within a preset range. Furthermore, by issuing unit shutdown signals, it reminds operators to request the shutdown of excess idle units, reducing water energy waste, improving water resource utilization efficiency, and further enhancing the economy and stability of the power system.

[0037] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0038] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0039] Figure 1 This is a schematic flowchart illustrating a voltage and reactive power control and regulation method for a large-scale generator-small-scale power grid provided in an embodiment of this application.

[0040] Figure 2 This is a schematic diagram of the logic flow for automatic reactor switching provided in an embodiment of this application;

[0041] Figure 3 This is a schematic diagram of the logic flow for automatic alarm shutdown of the reactor provided in an embodiment of this application;

[0042] Figure 4 This is a schematic diagram of a voltage and reactive power control and regulation device for a large-scale generator and small-scale power grid provided in an embodiment of this application. Detailed Implementation

[0043] The embodiments of this application 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 intended to explain this application, and should not be construed as limiting this application.

[0044] In Cambodia's power grid environment, characterized by large-scale mechanization and small-scale distribution, the grid situation is quite complex. The Cambodian power grid has its own unique characteristics, such as the distribution of maximum voltage levels and the composition of power sources. Taking the Lower Sesan 2 Hydropower Station as an example, numerous problems have been exposed during its operation.

[0045] During the dry season, the power station's output is low, and its transmission lines have significant distributed capacitance, resulting in a large amount of excess reactive power and causing the power frequency voltage at the line terminals to rise. The generator units of the Sanhe II Hydropower Station operate in a leading-phase state for extended periods. Monitoring data from the power plant shows that this leading-phase operation occurs from December to July of the following year, with a deeper leading-phase effect from December to April and a shallower effect from May to July. This leading-phase operation is to maintain the voltage of the Sanhe high-voltage busbar within limits, as the Sanhe-Upper Ding and Sanhe-Ratanakiri lines are transmitting reactive power to the Sanhe high-voltage busbar during this period.

[0046] To ensure stable system operation, hydro-generator units have often been forced to operate under deeply advanced phase conditions for many years, which has adversely affected the lifespan of the units. To ensure that the system voltage remains stable within a certain range (such as below 240kV), multiple units often operate simultaneously under advanced phase conditions. During the dry season, due to low water inflow, the units can only operate at low loads, which not only leads to low water energy utilization but also low operating efficiency of the hydro-generators.

[0047] When the leading phase of a hydro-generator unit is too deep, the generator's no-load potential decreases as the excitation current decreases, and the operating power angle increases, reducing the generator's stability margin and making it prone to entering a dangerous region of unstable operation. Furthermore, the generator absorbs reactive power from the system during leading phase operation, causing a drop in system voltage. If the system capacity is small or the reactive power reserve is insufficient, this will disrupt the stable operation between the system and the generator. Simultaneously, during deep leading phase operation, the stator end leakage flux change ratio increases, leading to severe end heating and a continuous rise in the generator stator coil temperature. On the other hand, it also causes a decrease in generator terminal voltage, resulting in a corresponding drop in plant auxiliary power voltage, directly affecting the normal operation of electrical equipment within the plant.

[0048] Furthermore, currently, reactors are manually connected / disconnected remotely or locally during operation, without automatic connection / disconnection functions, and they also lack the ability to analyze and process reactive power data from the lines. This is a significant deficiency when dealing with the complex reactive power control and regulation of the power grid.

[0049] In summary, the existing technology has the following technical problems:

[0050] 1) Insufficient monitoring of generator unit status: In hydropower stations, there is a lack of effective means to monitor the operating status of generator units in real time, including current, power and circuit breaker status.

[0051] 2) Power generation efficiency optimization problem: In power systems, optimizing power generation efficiency based on the actual operating status of generator units is a challenge. A method is needed to determine which units should be in generating mode and how to adjust their operation according to system demand.

[0052] 3) Low level of automation in reactor control: The operation status of reactors may require manual monitoring and operation, which is not only inefficient but also prone to errors.

[0053] 4) Difficulty in controlling system voltage: Maintaining a stable system voltage is a critical issue in power systems. Both excessively high and excessively low voltages can damage the power system.

[0054] 5) Uneven resource allocation: In the power system, there may be problems with uneven resource allocation. For example, at certain times, some units may be in an unloaded state, resulting in resource waste.

[0055] 6) Slow response speed: In power systems, the response to situations such as voltage anomalies may not be fast enough, requiring a fast and effective automated control mechanism to adjust the system state in a timely manner.

[0056] 7) Excessive human intervention: Existing power systems may rely too much on manual operation, which is not only inefficient but also susceptible to human error.

[0057] 8) Lack of integrated monitoring system: There may be a lack of an integrated monitoring system to simultaneously monitor the status of generator sets and reactors, as well as key parameters such as system voltage.

[0058] 9) Lack of intelligent decision support: In power systems, there may be a lack of intelligent decision support systems to help operators make quick and accurate decisions.

[0059] To address this issue, embodiments of this application provide a method for voltage and reactive power control and regulation under a large-scale generator-small-scale power grid system. Figure 1This is a schematic flowchart illustrating a voltage and reactive power control and regulation method for a large-scale generator-small-grid system provided in an embodiment of this application. Figure 1 As shown, the method includes the following steps:

[0060] Step 101: Determine the power generation status of each generator set and the operational status of each reactor.

[0061] In this embodiment of the application, the process for determining the power generation status of each generator set is as follows:

[0062] First, collect the terminal current value, active power value, output circuit breaker location, and main transformer high-voltage side circuit breaker location of each generator set.

[0063] One possible implementation involves installing current and power sensors at the output of each generator set to monitor the terminal current and active power in real time. Position sensors (such as limit switches or contactors) are installed at the outlet circuit breaker and the high-voltage side circuit breaker of the main transformer to obtain the closed or open status of the switches. Each sensor is then connected to a data acquisition unit (such as a PLC or embedded system), receiving sensor data via an appropriate communication protocol (such as Modbus, CAN bus, etc.) and storing the data in memory. The acquired data is then processed to calculate the real-time power generation status of each generator set, and the processed data is transmitted to a centralized monitoring system via a network (such as Ethernet or a wireless network). Finally, the monitoring system displays the terminal current value, terminal active power value, and the status (closed or open) of the outlet circuit breaker and the high-voltage side circuit breaker of the main transformer for each generator set.

[0064] It should be noted that the terminal current value, active power value, and the location of the outlet circuit breaker and the high-voltage side circuit breaker of the main transformer can also be obtained through other means. This application does not make specific limitations on these methods. This application only provides one possible method and does not intend to limit this application.

[0065] Then, the power generation status of each generator unit is determined:

[0066] If the terminal current of a generator set is greater than the second preset current, and the generator set's outlet circuit breaker is in the closed position and the main transformer's high-voltage side circuit breaker is in the closed position, the generator set is determined to be in generating state.

[0067] Alternatively, if the active power value at the generator terminal of the generator set is greater than the second preset active power value, and the generator set outlet circuit breaker is in the closed position and the main transformer high voltage side circuit breaker is in the closed position, the generator set is determined to be in generating state.

[0068] If neither of the above two judgment conditions is met, the generator set is determined to be in a shutdown state.

[0069] It is understood that the second preset current and the second preset active power need to be set according to the actual scenario, and this application does not make specific limitations on this.

[0070] In this embodiment of the application, the process for determining the operating status of each reactor is as follows:

[0071] First, collect the reactive power values ​​of each reactor and the location of the output circuit breaker.

[0072] It is understandable that the process of collecting reactor data can be similar to the process of collecting generator data.

[0073] One possible implementation involves installing a reactive power sensor (such as a power quality analyzer or corresponding power measuring instrument) at the output of each reactor to monitor the reactor's reactive power in real time. A position sensor (such as a limit switch or contactor) is installed at the reactor's output circuit breaker location to detect the circuit breaker's closed and open status. Then, a data acquisition unit (such as a PLC, embedded system, or dedicated power monitoring equipment) is connected to each sensor, receiving sensor data via an appropriate communication protocol (such as Modbus, CAN bus, etc.) and storing the data in memory. The acquired data is then processed to calculate the real-time generation status of each generator set, and the processed data is transmitted to a centralized monitoring system via a network (such as Ethernet or a wireless network). Finally, the monitoring system displays the generator terminal current value, generator terminal active power value, and the status (closed or open) of the output circuit breaker and the main transformer high-voltage side circuit breaker for each generator set.

[0074] It should be noted that the reactive power values ​​of each reactor and the location of the output circuit breaker can also be obtained through other means. This application does not make specific limitations on this. This application only provides one possible method and does not intend to limit this application.

[0075] Then, the operational status of each reactor is determined:

[0076] If the reactive power value of a certain reactor is greater than the first preset reactive power and the circuit breaker at the reactor outlet is in the closed position, the reactor is determined to be in operation; otherwise, the reactor is determined to be in shutdown.

[0077] It is understood that the first preset reactive power needs to be set according to the actual scenario, and this application does not make specific limitations on it.

[0078] In this embodiment of the application, under specific conditions, such as when the current and power values ​​of the generator set are lower than a specific threshold, the reactor is in operation, or the system voltage is higher or lower than a specific value, the system automatically controls the connection of the reactor or the shutdown of the generator set to regulate the system voltage, as described in steps 102 and 103.

[0079] Step 102: If at least one generator set is in generating state and the terminal current value of all generator sets is less than the first preset current or the terminal active power value is less than the first preset active power, and all reactors are in shutdown state and the bus voltage is greater than the first preset voltage, control the first reactor output circuit breaker to close and connect the first reactor to the power system.

[0080] This step involves performing a logical judgment process to determine whether the reactors are connected to the power system, which corresponds to a scenario where all reactors are in an out-of-service state.

[0081] It is understood that the first preset current, the first preset active power, and the first preset voltage need to be set according to the actual scenario, and this application does not make specific limitations in this regard.

[0082] Step 103: If at least one generator set is in generating state and the terminal current value of all generator sets is less than the first preset voltage or the terminal active power value is less than the first preset active power, and the first reactor is in operation state while the other reactors are in shutdown state, and the bus voltage is greater than the first preset voltage, control the second reactor output circuit breaker to close and connect the second reactor to the power system.

[0083] This step involves performing a logical judgment process to determine whether other reactors in the out-of-operation state should be connected to the power system. This corresponds to the scenario where the first reactor is in operation while the rest of the reactors are in the out-of-operation state.

[0084] It is understood that the first preset current, the first preset active power, and the first preset voltage need to be set according to the actual scenario, and this application does not make specific limitations in this regard.

[0085] It is understandable that if a third reactor is present in a certain scenario, the subsequent judgment and incorporation process will be as follows:

[0086] If at least one generator set is in generating state and the terminal current value of all generator sets is less than the first preset voltage or the terminal active power value is less than the first preset active power, and the first and second reactors are in operation while the remaining reactors are in shutdown state, and the bus voltage is greater than the first preset voltage, control the third reactor output circuit breaker to close and connect the third reactor to the power system.

[0087] Similarly, the subsequent fourth and fifth reactors are similar, and this application will not repeat the description.

[0088] In addition, the method proposed in this application can also provide automatic alarm for reactors.

[0089] Specifically, in scenarios with two reactors, if at least one generator set is in generating mode, and the terminal current value of all generator sets is less than the first preset voltage or the terminal active power value is less than the first preset active power, and the first reactor is in operation or the second reactor is in operation, and the number of generator sets in generating mode is greater than the preset number, and the bus voltage is greater than the second preset voltage, a generator set shutdown signal is issued to remind the on-duty operator to apply to the dispatcher to shut down the excess idle generator sets in order to reduce the water consumption rate of the generator sets, reduce resource waste and improve efficiency.

[0090] It is understood that the preset number of generating units in power generation mode needs to be set according to the actual scenario, and this application does not make specific limitations on this.

[0091] To more clearly illustrate the process of voltage and reactive power control and regulation method under a large-scale power generation and small-scale grid proposed in this application, a specific embodiment is given below. This embodiment takes a scenario in the Lancang River basin that includes the Sanghe Units 1-8 and the 230kV No. 1 reactor and 230kV No. 2 reactor of the Shangding substation as an example.

[0092] Example 1

[0093] (1)Reference Figure 2 Collect the terminal current values ​​of Sanghe Units 1-8. If the unit current is greater than 1.1%In (rated current) and the unit outlet circuit breaker is in the closed position and the main transformer high voltage side circuit breaker is in the closed position, the unit is determined to be in generating state.

[0094] Additionally, set the power generation state to 1 and the shutdown state to 0.

[0095] (2) Collect the active power values ​​at the generator terminals of Sanghe Units 1-8. If the active power of the unit is greater than 1%Pn (rated active power) and the unit's outlet circuit breaker is in the closed position and the main transformer's high-voltage side circuit breaker is in the closed position, the unit is determined to be in the generating state.

[0096] Additionally, set the power generation state to 1 and the shutdown state to 0.

[0097] (3) By forming an "OR" relationship between (1) and (2), we can obtain the units that are currently generating electricity from units 1 to 8.

[0098] (4) Add up the number of generating units in the generating state. For example, if units 1, 4 and 6 generate 1MW each, 1 / 50*100%=2%Pn>1%Pn, then units 1, 4 and 6 are in the generating state, and the total number of generating units is 3.

[0099] (5) Collect the reactive power value of 230kV 1# reactor and the position of the 230kV 1# reactor outlet circuit breaker at Shangding substation. When the reactive power value of 230kV 1# reactor is greater than 80%Qn (rated reactive power) and the 230kV 1# reactor outlet circuit breaker is in the closed position, it is determined that 230kV 1# reactor is in operation and set to 1; otherwise, it is in the "out of operation" state and set to 0.

[0100] (6) Collect the reactive power value of the 230kV 2# reactor and the closing position of the 230kV 2# reactor outlet circuit breaker at Shangding Substation. If the reactive power value of the 230kV 2# reactor is greater than 80%Qn (rated reactive power) and the 230kV 2# reactor outlet circuit breaker is in the closed position, the 230kV 2# reactor is determined to be in operation and set to 1; otherwise, it is in the "out of operation" state and set to 0.

[0101] (7) When (1) and (2) are satisfied, that is, at least one generator unit among units 1-8 is in generating state, and the terminal current value of units 1-8 is [less than 5.5%In (rated current) or less than 5%Pn (rated active power)], and [the 230kV 1# reactor is out of service and the 230kV 2# reactor is out of service], and the system voltage (bus voltage) is greater than 240kV, the monitoring system automatically issues a closing order for the 230kV 1# reactor output circuit breaker to connect the 230kV 1# reactor to the system and reduce the system voltage (connecting one reactor can reduce the system voltage by about 1.5kV).

[0102] (8) When (1) and (2) are satisfied, that is, at least one generator unit among units 1-8 is in the generating state, and the terminal current value of units 1-8 is less than 5.5%In (rated current) or less than 5%Pn (rated active power)], and the 230kV 1# reactor is in operation, and the system voltage (bus voltage) is greater than 240kV, the monitoring system automatically issues a closing command for the 230kV 2# reactor outlet circuit breaker to connect the 230kV 2# reactor to the system and reduce the system voltage.

[0103] (9)Reference Figure 3 When (1) and (2) are satisfied, that is, at least one generator unit among units 1-8 is in the generating state, and the terminal current value of units 1-8 is [less than 5.5%In (rated current) or less than 5%Pn (rated active power)], and [(5) = 1 or (6) = 1], that is, at least one reactor is in the operating state, and (4) ≥ 3, that is, the total number of generating units is greater than 3, and the collected system voltage (bus voltage) is less than 235kV, the monitoring system automatically sends a "unit can be shut down" signal to remind the on-duty staff to apply to the dispatcher to shut down the excess idle units in order to reduce the water consumption rate of the units.

[0104] To achieve the above embodiments, this application also proposes a voltage and reactive power control and regulation device for a large-scale generator-small-scale power grid. Figure 4 This is a schematic diagram of the structure of a voltage and reactive power control and regulation device 10 under a large-scale generator-small-scale power grid configuration, provided in an embodiment of this application. Figure 4 As shown, the device includes:

[0105] The status confirmation module 100 is used to determine the power generation status of each generator set and the commissioning status of each reactor.

[0106] If at least one generator set is in generating state and the terminal current value of all generator sets is less than the first preset current or the terminal active power value is less than the first preset active power, and all reactors are in shutdown state and the bus voltage is greater than the first preset voltage, the first reactor output circuit breaker is controlled to close to connect the first reactor to the power system.

[0107] The second input module 300 is used to control the second reactor output circuit breaker to close and connect the second reactor to the power system if at least one generator set is in generating state and the terminal current value of all generator sets is less than the first preset voltage or the terminal active power value is less than the first preset active power, and the first reactor is in operation state while the other reactors are in shutdown state, and the bus voltage is greater than the first preset voltage.

[0108] To implement the above embodiments, this application also proposes an electronic device, including: a processor and a memory communicatively connected to the processor; the memory stores computer execution instructions; the processor executes the computer execution instructions stored in the memory to implement the method provided in the foregoing embodiments.

[0109] To implement the above embodiments, this application also proposes a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the methods provided in the foregoing embodiments.

[0110] To implement the above embodiments, this application also proposes a computer program product, including a computer program that, when executed by a processor, implements the methods provided in the foregoing embodiments.

[0111] The collection, storage, use, processing, transmission, provision, and disclosure of user personal information involved in this application all comply with the provisions of relevant laws and regulations and do not violate public order and good morals.

[0112] It should be noted that personal information collected from users should be used for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. Furthermore, such collection / sharing should only be conducted after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign an agreement / authorization that includes authorization of relevant user information before the user uses the function. In addition, any necessary steps must be taken to protect and safeguard access to such personal information data and ensure that others with access to personal information data comply with their privacy policies and procedures.

[0113] This application is intended to provide an implementation scheme for users to selectively prevent the use or access to their personal information data. Specifically, this disclosure is intended to provide hardware and / or software to prevent or block access to such personal information data. Once personal information data is no longer needed, risks can be minimized by restricting data collection and deleting data. Furthermore, where applicable, such personal information is de-identified to protect user privacy.

[0114] In the foregoing descriptions of the embodiments, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0115] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0116] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0117] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0118] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0119] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0120] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0121] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

[0122] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.

[0123] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for voltage and reactive power control and regulation under a large-scale power plant and small-scale grid system, characterized in that, Includes the following steps: Determine the power generation status of each generator set and the operational status of each reactor; The power generation status includes: collecting the terminal current value and active power value of each generator set, as well as the position of the output circuit breaker and the position of the high-voltage side circuit breaker of the main transformer; if the terminal current value of a generator set is greater than the second preset current, and the output circuit breaker of the generator set is in the closed position and the high-voltage side circuit breaker of the main transformer is in the closed position, the generator set is determined to be in power generation status; or, if the terminal active power value of the generator set is greater than the second preset active power, and the output circuit breaker of the generator set is in the closed position and the high-voltage side circuit breaker of the main transformer is in the closed position, the generator set is determined to be in power generation status; otherwise, the generator set is determined to be in shutdown status. The operational status includes: collecting the reactive power value of each reactor and the position of the output circuit breaker; if the reactive power value of a certain reactor is greater than the first preset reactive power and the reactor output circuit breaker is in the closed position, the reactor is determined to be in the operational state; otherwise, the reactor is determined to be in the out-of-operation state. If at least one generator set is in generating state and the terminal current value of all generator sets is less than the first preset current or the terminal active power value is less than the first preset active power, and all reactors are in shutdown state, and the bus voltage is greater than the first preset voltage, control the circuit breaker of the first reactor output to close and connect the first reactor to the power system. If at least one generator set is in generating state and the terminal current value of all generator sets is less than the first preset voltage or the terminal active power value is less than the first preset active power, and the first reactor is in operation state while the other reactors are in shutdown state, and the bus voltage is greater than the first preset voltage, control the second reactor output circuit breaker to close and connect the second reactor to the power system. If at least one generator set is in generating mode, and the terminal current value of all generator sets is less than the first preset voltage or the terminal active power value is less than the first preset active power, and the first reactor is in operation or the second reactor is in operation, and the number of generator sets in generating mode is greater than the preset number, and the bus voltage is greater than the second preset voltage, a generator set shutdown signal is issued to remind the on-duty operator to apply to the dispatcher to shut down the excess idle generator sets in order to reduce the generator set water consumption rate.

2. A voltage and reactive power control and regulation device for large-scale power generation and small-scale grid operation, characterized in that, include: The status confirmation module is used to determine the power generation status of each generator set and the commissioning status of each reactor; The power generation status includes: collecting the terminal current value and active power value of each generator set, as well as the position of the output circuit breaker and the position of the high-voltage side circuit breaker of the main transformer; if the terminal current value of a generator set is greater than the second preset current, and the output circuit breaker of the generator set is in the closed position and the high-voltage side circuit breaker of the main transformer is in the closed position, the generator set is determined to be in the power generation state; or, if the terminal active power value of the generator set is greater than the second preset active power, and the output circuit breaker of the generator set is in the closed position and the high-voltage side circuit breaker of the main transformer is in the closed position, the generator set is determined to be in the power generation state; otherwise, the generator set is determined to be in the shutdown state; the operation status includes: collecting the reactive power value and the position of the output circuit breaker of each reactor; if the reactive power value of a reactor is greater than the first preset reactive power and the output circuit breaker of the reactor is in the closed position, the reactor is determined to be in the operation state; otherwise, the reactor is determined to be in the shutdown state. The first input module controls the first reactor output circuit breaker to close if at least one generator set is in generating state and the generator terminal current value of all generator sets is less than the first preset current or the generator terminal active power value is less than the first preset active power, and all reactors are in shutdown state and the bus voltage is greater than the first preset voltage, in order to connect the first reactor to the power system. The second input module is used to control the second reactor output circuit breaker to close and connect the second reactor to the power system if at least one generator set is in the generating state and the terminal current value of all generator sets is less than the first preset voltage or the terminal active power value is less than the first preset active power, and the first reactor is in the operating state while the other reactors are in the out-of-operation state, and the bus voltage is greater than the first preset voltage. The signal module is used to issue a unit shutdown signal if at least one generator set is in generating state, and the terminal current value of all generator sets is less than the first preset voltage or the terminal active power value is less than the first preset active power, and the first reactor is in operation or the second reactor is in operation, and the number of generator sets in generating state is greater than a preset number, and the bus voltage is greater than the second preset voltage, so as to remind the on-duty operator to apply to the dispatcher to shut down the excess idle generator sets in order to reduce the water consumption rate of the generator sets.

3. An electronic device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory to implement the method as described in claim 1.

4. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in claim 1.

5. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method of claim 1.

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