Active power stability control method and system for new energy station

Abstract

The invention relates to the technical field of power grid motor control, and discloses an active stability control method and system for a new energy station, and the method comprises the steps: receiving an active power plan value issued by a central station in real time, analyzing the actual active power of the current station, immediately giving an alarm to remind a station worker, and according to a certain generator tripping principle, carrying out the real-time operation of the station; and a tripping outlet is set after time delay, so that multi-feeder cutting is realized, the total output of the station is stably controlled, and the scheduling requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid motor control, and in particular to an active power stability control method and system for a new energy station. Background Art

[0002] At present, wind farms / photovoltaic power stations and other new energy power stations are usually controlled according to the planned active power curve issued by the general dispatch / provincial dispatch, that is, the dispatch will issue the planned power curve of the power station at least one day in advance, and the power station will fill it by starting / stopping to meet the dispatch requirements. However, frequent startup and switching at the minute level is obviously difficult to be operated manually, and it is easy for the staff to fail to start or shut down in time due to omissions, resulting in the total active value of the power station failing to meet the dispatch curve requirements.

[0003] Therefore, a device or system is needed that can automatically control the active power output of the station in real time to help operation and maintenance personnel to control it. Summary of the invention

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides an active power stability control method for a new energy station, including analog quantity acquisition, real-time detection of active power in operation, switch quantity acquisition, control of the input and output pressure plates, and alarm according to the active power plan value issued, analysis and generation of the machine cutting instruction, tripping corresponding to the machine cutting outlet, to ensure the maximum possible power generation of the wind farm / photovoltaic power station without affecting the stability of the system.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions, a method for active power stability control of a new energy station, comprising: the system receives the active power plan value Pplan issued by the central station or the substation in real time; monitors the proximity between the station output and the planned value, and when the output is close to the planned value, sends a voice signal to prompt the operating personnel to control the unit output; cuts off the collector line through the machine cutting and throwing function; analyzes the difference between the active power and the planned value in real time, and cuts off the feeder to keep the total active power of the station meeting the requirements.

[0007] As a preferred solution of the active power stability control method of a new energy station described in the present invention, before receiving the active power plan value issued by the central station or the substation in real time, the secondary voltage and current of the bus and the collector line are measured through the AC plug-in, the PT / CT transformation ratio is input in advance, and the primary active power is calculated.

[0008] As a preferred solution of the active power stability control method of a new energy station described in the present invention, after calculating the active power once, the plug-in is opened to detect the status of the pressure plate to determine whether the collector line cutting function is in or out, and the feeder cutting function is realized by opening the plug-in.

[0009] As a preferred solution of the active stability control method of a new energy station described in the present invention, the degree of proximity between the monitored station output and the planned value includes that the system has an alarm function, and the fixed value configurations [over-plan warning coefficient] and [over-plan alarm coefficient].

[0010] As a preferred solution of the active power stability control method of a new energy station described in the present invention, wherein: the monitoring of the proximity between the station output and the planned value also includes that when the station output is close to the planned value, the active power control system sends a voice signal to inform the operating personnel to pay attention to control the unit output;

[0011] The early warning criteria are as follows:

[0012] Action criterion: output > active power plan × [over-plan warning coefficient constant]

[0013] Return criterion: Output < Active power plan × [over-plan warning coefficient constant] – 5MW

[0014] Action criterion: P sum ≥P plan *K cyS , K cyS Indicates the value of the over-plan warning coefficient

[0015] Return criterion: P sum <P plan ×K cyS –5MW

[0016] The alarm criteria are as follows:

[0017] When P sum ≥P plan *K gzS , K gzS Indicates the threshold coefficient of short delay exceeding the planned value. After 0.1s, an alarm is issued if the plan is exceeded, and the return value is P plan *KgzS-5MW and P plan Small value between ;

[0018] When P sum ≥P plan +P gzL , P gzL It indicates that the long delay exceeds the planned value threshold. After 0.1s, an over-plan alarm is issued and the return value is Pplan.

[0019] As a preferred scheme of the active stability control method of a new energy station described in the present invention, the cutting operation includes: determining whether the relevant collector line can be cut off through a hard pressure plate, connecting to the 110V / 220V high-voltage input, performing photoelectric isolation conversion on the signal input, converting the high-voltage on-off signal into a digital 0, 1 level, and performing timed sampling processing.

[0020] As a preferred solution of the active power stability control method of a new energy station described in the present invention, wherein: the real-time analysis of the difference between the active power and the planned value includes that the system has a short-delay cutting function and a long-delay cutting function, and performs a feeder cutting operation according to the relationship between the real-time monitored total active output and the active planned value;

[0021] When cutting off the feeder, select the collector line to be cut off according to the principle of minimum overcutting to ensure that the cutting operation has the least impact on the system;

[0022] When the information from the superior station is invalid, the minimum output set value is used as the active power generation plan, and the feeder cutting function is locked for a certain period of time. After each feeder cutting action, the short-term and long-term feeder cutting functions are locked for a short period of time to meet the power station output requirements and maintain the safe and stable operation of the system.

[0023] Another object of the present invention is to provide an active power stability control system for a new energy station, which can ensure that the new energy station can output electricity stably and efficiently according to the requirements of the power grid, while protecting the safety of the power grid and station equipment and improving the overall operation quality of the power system.

[0024] As a preferred solution of the active power stability control system of a new energy station described in the present invention, it includes: a measurement and calculation module, a control and execution module, an alarm and prompt module, an active power management module, and a safety and stability protection module;

[0025] The measurement and calculation module includes an AC plug-in measurement function, which is used to measure the secondary voltage and current of the busbar and the collector line, and calculate the primary active power. It is also responsible for inputting the PT / CT ratio to ensure the accuracy of the measurement data;

[0026] The control and execution module integrates the plug-in detection function and the plug-in execution function, and is used to detect the switch-in and switch-out conditions, determine the switch-in and switch-out conditions, and execute the feeder cutting operation;

[0027] The alarm and prompt module is responsible for configuring the [over-plan warning coefficient] and [over-plan alarm coefficient], monitoring the proximity between the station output and the planned value, and sending a voice signal when the output is close to the planned value to prompt the operator to control the unit output;

[0028] The active power management module receives the active power plan value Pplan issued by the central station or the substation in real time, and is responsible for real-time analysis of the difference between the active power and the plan value, and controls the function of cutting off and putting in and out of the generator to ensure that the total active power of the station meets the requirements;

[0029] The safety and stability protection module includes a short-delay cutting function and a long-delay cutting function. It selects the collector line to be cut off according to the principle of minimum overcutting, and locks the feeder cutting function when necessary to ensure the safe and stable operation of the system.

[0030] A computer device includes a memory and a processor, wherein the memory stores a computer program, and is characterized in that when the processor executes the computer program, it implements the steps of an active power stability control method for a new energy station.

[0031] A computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of a method for active power stability control of a new energy station are implemented.

[0032] Beneficial effects of the present invention: By real-time monitoring and calculation of active power, the system can accurately control the output of new energy stations to keep it consistent with the active power plan value issued by the power grid, thereby improving the dispatching and management efficiency of the power system. By adjusting the power factor, the system helps to improve the quality of power, reduce harmonic pollution of the power grid, and improve the stability and power supply reliability of the power grid. Through the machine cutting function and feeder cutting operation, the system can quickly respond to power deviations, effectively prevent the instability of the power grid caused by power fluctuations, and ensure the safe operation of the power system.

[0033] The system's automated control and alarm functions reduce the operating staff's work pressure, reduce human errors, and improve work efficiency. The system has an automatic protection function under abnormal conditions, which can lock related operations in time to prevent equipment damage and accidents from expanding, ensuring the safety of personnel and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0035] Figure 1 A schematic flow chart of an active power stability control method for a new energy station provided in accordance with an embodiment of the present invention.

[0036] Figure 2A schematic diagram of working modules of an active power stability control system of a new energy station provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0040] The present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0041] At the same time, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Example 1, reference Figure 1 , which is the first embodiment of the present invention, and provides an active power stability control method for a new energy station, comprising:

[0044] S1: The system receives the active power plan value Pplan sent by the central station or substation in real time.

[0045] Furthermore, before receiving the active power plan value issued by the central station or substation in real time, the secondary voltage and current of the busbar and the collector line are measured through the AC plug-in, the PT / CT ratio is input in advance, and the primary active power is calculated.

[0046] The PT / CT ratios of line n are PT n , CT n , the secondary side measured current is I n , the secondary voltage is U n , Φ n is the voltage and current measurement angle difference, and the power factor is COSΦ n .

[0047] P=*U 1* I 1* COSΦ1+*U 2* I 2* COSΦ2+……+U n* I n* COSΦ n

[0048] By opening the plug-in, the pressure plate is tested to determine whether the collector line cutter function is on or off. By opening the plug-in, the knife switch cuts off the feeder function.

[0049] It should be noted that after calculating the active power once, the plug-in is opened to detect the status of the pressure plate to determine whether the collector line cutting function is on or off, and the feeder cutting function is realized by opening the plug-in.

[0050] S2: Monitors the proximity between the station output and the planned value. When the output is close to the planned value, a voice signal is issued to prompt the operator to control the unit output.

[0051] Furthermore, the monitoring station output is close to the planned value, including that the device has an alarm function, and the fixed value configuration [over-plan warning coefficient] and [over-plan alarm coefficient].

[0052] It should be noted that when the station output is close to the planned value, the active power control system sends a voice signal to inform the operating personnel to pay attention to controlling the unit output;

[0053] The early warning criteria are as follows:

[0054] Action criterion: output > active power plan × [over-plan warning coefficient constant]

[0055] Return criterion: Output < Active power plan × [over-plan warning coefficient constant] – 5MW

[0056] Action criterion: P sum ≥P plan *K cyS , K cyS Indicates the value of the over-plan warning coefficient

[0057] Return criterion: P sum <P plan ×K cyS –5MW

[0058] The alarm criteria are as follows:

[0059] When P sum ≥P plan *K gzS , K gzS Indicates the threshold coefficient of short delay exceeding the planned value. After 0.1s, an alarm is issued if the plan is exceeded, and the return value is P plan *KgzS-5MW and P plan Small value between ;

[0060] When P sum ≥P plan +P gzL , P gzL It indicates that the long delay exceeds the planned value threshold. After 0.1s, an over-plan alarm is issued and the return value is Pplan.

[0061] S3: Cut off the collector line through the machine cutting and throwing function.

[0062] Furthermore, the hard pressure plate determines whether the relevant collector line can be cut off, accesses the 110V / 220V strong current input, performs photoelectric isolation conversion on the signal input, converts the strong current on / off signal into the digital 0, 1 level, and performs timed sampling processing. The standard configuration provides 50-channel input quantity collection, which is mainly used for functional pressure plates, cut-off pressure plates, etc.

[0063] S4: Analyze the difference between active power and planned value in real time, and cut off the feeder to keep the total active power of the station meeting the requirements.

[0064] Furthermore, the real-time analysis of the difference between the active power and the planned value includes that the system has a short-delay cutting function and a long-delay cutting function, and performs feeder cutting operations according to the relationship between the real-time monitored total active output and the active planned value;

[0065] The system switching logic is as follows:

[0066] The system receives the active power target value P issued by the central station or substation in real time. plan And control time limit T plan , while monitoring the current total active output P sum .

[0067] When the active power target value P plan When changes occur, update the control time limit T plan , and start timing. When the timing reaches the control time limit, if the total output P sum >P plan , then press (P sum -P plan ) Cut off the feeder.

[0068] According to the above basic logic, two types of delayed switching functions are configured.

[0069] Short delay cutting machine:

[0070] When P sum ≥P plan *K gzS (K gzS Short delay exceeds the planned value threshold coefficient), after short delay T gzS (Short delay exceeds the planned time setting value), press (P sum -P plan ) Cut off the feeder.

[0071] Long delay cutting machine:

[0072] When P sum ≥P plan +P gzL (P gzL Exceeding the planned threshold value), after a long delay T gzL After (long delay exceeds the planned value time setting), press (P sum -P plan ) Cut off the feeder.

[0073] P sum ≥P plan +P gzL , the countdown for cutting the feeder is T gzL is the initial value and counts down at a rate of 1s.

[0074] During the countdown, if P plan ≤P sum <(P plan +P gzL ), the feeder cutting countdown window in the background does not disappear, and the feeder cutting countdown is retracted at a rate of 3s until the T set in the device is reached. gzL During the rollback process, sum ≥(P plan +P gzL), the countdown stops and re-starts the machine cutting countdown.

[0075] P sum <P plan , the background switching countdown window disappears.

[0076] After the feeder is cut, the feeder cut countdown is reset.

[0077] When blocking the short-time and long-time feeder cutting functions, if P sum ≥(P sum +P gzL ), the machine cutting countdown window pops up in the background to remind users to pay attention to the output of the active devices of the wind and solar execution station. The machine cutting countdown stops until the lockout time is set and released.

[0078] Required cutting capacity = P sum -P plan , select from the uncut collectors (allowable cut pressure plate is 1) according to the capacity to be cut, and the cutting principle is as follows:

[0079] Minimum over-cutting principle: when the planned active power is exceeded, the smallest feeder active power combination is selected for cutting until it is less than the planned active power value.

[0080] If only one line is cut, select the unit with the closest capacity to cut off.

[0081] If you need to cut N lines, first cut N-1 lines from largest to smallest, and then cut the last line according to principle 2.

[0082] When it is determined that the information of the superior station is invalid and the active power generation plan is switched to "minimum output constant value": the short-term and long-term feeder cutting functions are locked for 15 minutes (the time is a fixed value and can be set by the central station), and the lock is released after 15 minutes or when the current total output is lower than the current planned value (i.e. the minimum output constant value).

[0083] After each feeder cutting action, the short-time and long-time feeder cutting functions are locked within 1 second.

[0084] Embodiment 2 is an embodiment of the present invention, which provides an active power stability control method for a new energy station. In order to verify the beneficial effects of the present invention, scientific demonstration is carried out through experiments.

[0085] This embodiment provides a verification test for a new energy site to verify that the device and system correctly cut off the bus when the power changes, in order to verify and illustrate the technical effects adopted in this method.

[0086] Table 1 shows the power data actually sent to the host computer for calculation under two different additions of the actual measurement and control device, where the PT displacement is set to 110kV / 100V, and the CT ratio is set to 400A / 1A, that is, the primary and secondary power displacements are 0.44MW / 1W.

[0087] Planned target power P plan Set to 80MW, short delay exceeding planned value threshold coefficient K gzS Set to 1.25, short delay T gzS Set to 1S.

[0088] The initial actual active power is the sum of the active power of each outgoing line, 98.34MW. After changing the tester, the sum of the active power of each outgoing line is 105.27MW. sum ≥P plan *K gzS After 1S, the corresponding output relay CJ02 is activated to cut off the 2# output line, meeting the machine cutting logic. This device and system analyzes the difference between the current active power and the planned value in real time, trips the corresponding relay output, and keeps the total active power of the station meeting the requirements of the issued active power curve.

[0089] Table 1: Calculated power data of actual measurement and control device

[0090]

[0091] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0092] Embodiment 3, the third embodiment of the present invention, is different from the first two embodiments in that:

[0093] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0094] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0095] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0096] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0097] Example 4, reference Figure 2 , which is an embodiment of the present invention, provides an active power stability control system for a new energy station, characterized in that it includes a measurement and calculation module 1, a control and execution module 2, an alarm and prompt module 3, an active power management module 4, and a safety and stability protection module 5;

[0098] The measurement and calculation module 1 includes an AC plug-in measurement function, which is used to measure the secondary voltage and current of the busbar and the collector line and calculate the primary active power. It is also responsible for inputting the PT / CT ratio to ensure the accuracy of the measurement data.

[0099] The control and execution module 2 integrates the plug-in detection function and the plug-in execution function, which is used to detect the insertion and withdrawal of the pressure plate, determine the insertion and withdrawal of the cutting function, and execute the operation of cutting off the feeder by the knife switch.

[0100] The alarm and prompt module 3 is responsible for configuring the [over-plan warning coefficient] and [over-plan alarm coefficient], monitoring the proximity of the station output to the planned value, and issuing a voice signal when the output is close to the planned value to prompt the operating personnel to control the unit output.

[0101] The active power management module 4 receives the active power plan value Pplan sent by the central station or the substation in real time, and is responsible for real-time analysis of the difference between the active power and the plan value, and controls the function of cutting off and putting on and off the machine to ensure that the total active power of the station meets the requirements.

[0102] The safety and stability protection module 5 includes a short-delay cutting function and a long-delay cutting function. It selects the collector line to be cut off according to the principle of minimum overcutting, and locks the feeder cutting function when necessary to ensure the safe and stable operation of the system.

[0103] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for active power stability control of a new energy station, characterized in that: include, The system receives the active power plan value Pplan issued by the central station or substation in real time; Monitor the proximity between the station output and the planned value. When the output is close to the planned value, send a voice signal to prompt the operator to control the unit output; The collector line can be cut off through the machine cutting and throwing function; Analyze the difference between active power and planned value in real time, and cut off the feeder to keep the total active power of the station meeting the requirements.

2. The active power stability control method of a new energy station according to claim 1, characterized in that: Before receiving the active power plan value sent by the central station or the substation in real time, the secondary voltage and current of the busbar and the collector line are measured through the AC plug-in, the PT / CT ratio is input in advance, and the primary active power is calculated.

3. The active power stability control method of a new energy station according to claim 2, characterized in that: After the active power is calculated once, the plug-in is opened to detect the activation and deactivation of the pressure plate, and it is determined whether the collector line cutting function is activated or deactivated. The feeder cutting function is realized by opening the plug-in.

4. The active power stability control method of a new energy station according to claim 3, characterized in that: The degree of closeness between the output of the monitoring station and the planned value includes that the system has an alarm function, and the fixed value configurations [over-plan warning coefficient] and [over-plan alarm coefficient].

5. The active power stability control method of a new energy station according to claim 4, characterized in that: The monitoring of the proximity between the station output and the planned value also includes that when the station output is close to the planned value, the active power control system sends a voice signal to inform the operating personnel to pay attention to control the unit output; The early warning criteria are as follows: Action criterion: output > active power plan × [over-plan warning coefficient constant] Return criterion: Output < Active power plan × [over-plan warning coefficient constant] – 5MW Action criterion: P sum ≥P plan *K cyS , K cyS Indicates the value of the over-plan warning coefficient Return criterion: P sum <P plan ×K cyS –5MW The alarm criteria are as follows: When P sum ≥P plan *K gzS , K gzS Indicates the threshold coefficient of short delay exceeding the planned value. After 0.1s, an alarm is issued if the plan is exceeded, and the return value is P plan *KgzS-5MW and P plan Small value between ; When P sum ≥P plan +P gzL , P gzL It indicates that the long delay exceeds the planned value threshold. After 0.1s, an over-plan alarm is issued and the return value is Pplan.

6. The active power stability control method of a new energy station according to claim 5, characterized in that: The cutting operation includes determining whether the relevant collector line can be cut off through a hard pressure plate, connecting to a 110V / 220V high-voltage input, performing photoelectric isolation conversion on the signal input, converting the high-voltage on / off signal into a digital 0, 1 level, and performing timed sampling processing.

7. The active power stability control method of a new energy station according to claim 6, characterized in that: The real-time analysis of the difference between the active power and the planned value includes that the system has a short-delay cutting function and a long-delay cutting function, and performs a feeder cutting operation according to the relationship between the real-time monitored total active output and the planned active value; When cutting off the feeder, select the collector line to be cut off according to the principle of minimum overcutting to ensure that the cutting operation has the least impact on the system; When the information from the superior station is invalid, the minimum output set value is used as the active power generation plan, and the feeder cutting function is locked for a certain period of time. After each feeder cutting action, the short-term and long-term feeder cutting functions are locked for a short period of time to meet the power station output requirements and maintain the safe and stable operation of the system.

8. A system using the active power stability control method of a new energy station as claimed in any one of claims 1 to 7, characterized in that: It includes measurement and calculation module, control and execution module, alarm and prompt module, active power management module, safety and stability protection module; The measurement and calculation module includes an AC plug-in measurement function, which is used to measure the secondary voltage and current of the busbar and the collector line, and calculate the primary active power. It is also responsible for inputting the PT / CT ratio to ensure the accuracy of the measurement data; The control and execution module integrates the plug-in detection function and the plug-in execution function, and is used to detect the switch-in and switch-out conditions, determine the switch-in and switch-out conditions, and execute the feeder cutting operation; The alarm and prompt module is responsible for configuring the [over-plan warning coefficient] and [over-plan alarm coefficient], monitoring the proximity between the station output and the planned value, and sending a voice signal when the output is close to the planned value to prompt the operator to control the unit output; The active power management module receives the active power plan value Pplan issued by the central station or the substation in real time, and is responsible for real-time analysis of the difference between the active power and the plan value, and controls the function of cutting off and putting in and out of the generator to ensure that the total active power of the station meets the requirements; The safety and stability protection module includes a short-delay cutting function and a long-delay cutting function. It selects the collector line to be cut off according to the principle of minimum overcutting, and locks the feeder cutting function when necessary to ensure the safe and stable operation of the system.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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