A method and device for improving K value of thermal power unit based on energy storage charging and discharging

Abstract

The present invention discloses a method and device for improving the K value of a thermal power unit based on energy storage charging and discharging, and relates to the field of automatic power generation control technology. By utilizing the fast response characteristics of energy storage charging and discharging, the energy storage output and the unit output are combined into the overall output of the unit, the adjustment rate index, response time index, and adjustment accuracy index of the unit are improved, and the K value of the unit is improved. In addition, the addition of energy storage equipment can bear the random load component and part of the pulsating component, and the instantaneous charging and discharging function of energy storage can avoid frequent operation of the unit, reduce unit wear and extend the service life of the unit.

Description

Technical Field

[0001] The invention discloses a method and a device for improving the K value of a thermal power unit based on energy storage charging and discharging, and relates to the technical field of automatic power generation control. Background Art

[0002] Thermal power units (hereinafter referred to as units) participate in the frequency regulation auxiliary service market and earn compensation for frequency regulation auxiliary services. The unit's comprehensive frequency regulation performance index K affects whether the unit can participate in the frequency regulation auxiliary service market and the quotation of frequency regulation auxiliary services. Increasing the unit's K value can increase the frequency regulation auxiliary service market revenue. The performance of traditional power generation units is relatively fixed, and as the age increases, the performance will decline. If you want to increase the performance of the unit and improve the K value, you will need to invest a lot of money and have great technical difficulty. Summary of the invention

[0003] In view of the problems of the prior art, the present invention provides a method and device for improving the K value of a thermal power unit based on energy storage charging and discharging, and the technical solution adopted is:

[0004] In a first aspect, a method for improving the K value of a thermal power unit based on energy storage charging and discharging comprises:

[0005] S1, initialize parameters and read the data of unit instructions, unit output, energy storage output, and energy storage SOC in real time;

[0006] S2, detecting whether the instruction change exceeds the instruction dead zone according to the data;

[0007] S3, when the detected instruction change does not exceed the instruction dead zone, superimposing the new instruction and the old instruction of the read unit instruction;

[0008] S4, when the detected instruction change exceeds the instruction dead zone, the read unit instruction is treated as a new instruction and the adjustment processing of stage 1, stage 2, and stage 3 is performed in sequence;

[0009] S4 specifically includes:

[0010] S41, the stage 1 includes taking the read unit instruction as a new instruction, and detecting whether the combined output Ps reaches the target output through SOC, and entering stage 2 when the target output is reached; the combined output Ps includes the unit output Pj and the energy storage output Pe;

[0011] S42, the stage 2 includes, according to the new instruction, detecting whether the unit output reaches the target output through SOC, and entering stage 3 when the target output is reached;

[0012] S43, the stage 3 includes: according to the new instruction, detecting whether the unit output reaches the target output through SOC; detecting the difference between the unit output and the unit instruction, if it is greater than the set steady-state dead zone, adjusting the energy storage output at the set unit adjustment rate, if the unit output is greater than the instruction, reducing the energy storage output, and if the unit output is less than the unit instruction, increasing the energy storage output.

[0013] In some implementations, S41, the stage 1 specifically includes:

[0014] S411, taking the read unit instruction as a new instruction and detecting it through the SOC;

[0015] S412, detecting whether the combined output Ps reaches the target output through SOC detection;

[0016] S413, if the combined output Ps reaches the target output, then enter stage 2;

[0017] S414: For the combined output Ps that does not reach the target output, the energy storage output increase Pa is calculated by using the set energy storage adjustment rate.

[0018] In some implementations, S42, the stage 2 specifically includes:

[0019] S421, taking the read unit instruction as a new instruction and detecting it through the SOC;

[0020] S422, through SOC detection, detecting whether the unit output Ps reaches the command value;

[0021] S423, if the unit output Ps reaches the command value, then enter stage 3;

[0022] S424, when the unit output Ps does not reach the command value, the set unit adjustment rate is used to obtain the energy storage output reduction Pa opposite to the unit output increase or decrease, until the energy storage output is 0.

[0023] In some implementations, S43, the stage 3 specifically includes:

[0024] S431, taking the read unit instruction as a new instruction and detecting it through the SOC;

[0025] S432, detect the deviation between the unit output and the unit command through SOC detection;

[0026] S433, if the unit command deviation is greater than the set steady-state dead zone of the unit, the energy storage output is adjusted by the set unit adjustment rate;

[0027] S434, for the unit command deviation being less than the set steady-state dead zone of the unit, the energy storage output reduction Pa is calculated by using the set energy storage steady recovery rate until the energy storage output is 0.

[0028] In a second aspect, an embodiment of the present invention provides a device for increasing the K value of a thermal power unit based on energy storage charging and discharging, comprising:

[0029] Data acquisition module, used to initialize parameters and read data of unit instructions, unit output, energy storage output, and energy storage SOC in real time;

[0030] An instruction detection module, used for detecting whether the instruction change exceeds the instruction dead zone according to the data;

[0031] An instruction superposition module, used for superimposing the new instruction of the read unit instruction with the old instruction when the detected instruction change does not exceed the instruction dead zone;

[0032] An adjustment processing module, used for, when the detected instruction change exceeds the instruction dead zone, sequentially performing adjustment processing of stage 1, stage 2, and stage 3 on the read unit instruction as a new instruction;

[0033] The adjustment processing module specifically includes:

[0034] Phase 1 unit, the phase 1 includes taking the read unit command as a new command, and detecting whether the combined output Ps reaches the target output through SOC, and entering phase 2 when the target output is reached; the combined output Ps includes the unit output Pj and the energy storage output Pe;

[0035] Phase 2 unit, wherein the phase 2 includes, according to the new instruction, detecting whether the unit output reaches the target output through SOC, and entering phase 3 when the target output is reached;

[0036] The stage 3 unit includes: according to the new instruction, detecting whether the unit output reaches the target output through SOC; detecting the difference between the unit output and the unit instruction, if it is greater than the set steady-state dead zone, adjusting the energy storage output at the set unit adjustment rate, if the unit output is greater than the instruction, reducing the energy storage output, and if the unit output is less than the unit instruction, increasing the energy storage output.

[0037] In some implementations, the stage 1 unit, the stage 1 specifically includes:

[0038] A first detection subunit, used for taking the read unit instruction as a new instruction and performing detection through the SOC;

[0039] The target detection subunit is used to detect whether the combined output Ps reaches the target output through SOC detection;

[0040] The first stage output subunit is used for entering stage 2 when the combined output Ps reaches the target output;

[0041] The rate regulating subunit is used to obtain the energy storage output increase Pa by setting the energy storage regulation rate when the combined output Ps does not reach the target output.

[0042] In some implementations, S42, the stage 2 specifically includes:

[0043] A second detection subunit is used to use the read unit instruction as a new instruction and perform detection through the SOC;

[0044] The command detection subunit is used to detect whether the unit output Ps reaches the command value through SOC detection;

[0045] The second stage output subunit is used for the unit output Ps reaching the command value, then entering stage 3;

[0046] The energy storage regulation subunit is used to set the unit regulation rate to obtain the energy storage output reduction Pa which is opposite to the increase or decrease of the unit output when the unit output Ps does not reach the command value, until the energy storage output is 0.

[0047] In some implementations, S43, the stage 3 specifically includes:

[0048] A third detection subunit is used to use the read unit command as a new command and perform detection through the SOC;

[0049] Deviation detection subunit, used to detect the deviation between the unit output and the unit command through SOC detection;

[0050] The output regulating subunit is used to regulate the energy storage output by a set unit regulating rate when the unit instruction deviation is greater than a set steady-state dead zone of the unit;

[0051] The dead zone processing subunit is used to obtain the energy storage output reduction Pa by setting the energy storage steady recovery rate when the unit command deviation is less than the unit set steady-state dead zone, until the energy storage output is 0.

[0052] In a third aspect, an embodiment of the present invention provides an electronic device, comprising a memory and a processor, wherein the memory is used to store one or more computer instructions, wherein when the one or more computer instructions are executed by the processor, the method described in the first aspect above is implemented.

[0053] In a fourth aspect, an embodiment of the present invention provides a computer storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it is used to implement the method described in the first aspect.

[0054] One or more embodiments of the present invention can bring at least the following beneficial effects:

[0055] The present invention provides a method for improving the K value of a thermal power unit based on energy storage charging and discharging, which utilizes the fast response characteristics of energy storage charging and discharging to combine the energy storage output with the unit output into the overall unit output, thereby improving the unit's regulation rate index, response time index, and regulation accuracy index, and improving the unit's K value. In addition, the addition of energy storage equipment can bear the random load component and part of the pulsating component, and the instantaneous charging and discharging function of energy storage can avoid frequent operation of the unit, reduce unit wear and extend the unit's service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0057] Figure 1 It is an implementation flow chart of a method for improving the K value of a thermal power unit based on energy storage charging and discharging provided by an embodiment of the present invention;

[0058] Figure 2 It is a flow chart for implementing stage 1 of a method for improving the K value of a thermal power unit based on energy storage charging and discharging provided by an embodiment of the present invention;

[0059] Figure 3 It is a flow chart for implementing stage 2 of a method for improving the K value of a thermal power unit based on energy storage charging and discharging provided by an embodiment of the present invention;

[0060] Figure 4 It is a flow chart for implementing stage 3 of a method for improving the K value of a thermal power unit based on energy storage charging and discharging provided in an embodiment of the present invention.

[0061] Figure 5 The present invention provides an SOC detection flow chart of a method for improving the K value of a thermal power unit based on energy storage charging and discharging. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present invention.

[0063] Embodiment 1:

[0064] Figure 1 A flow chart of a method for improving the K value of a thermal power unit based on energy storage charging and discharging is shown, as Figure 1 As shown, the method for improving the K value of a thermal power unit based on energy storage charging and discharging provided in this embodiment includes:

[0065] S1, initialize parameters and read the data of unit instructions, unit output, energy storage output, and energy storage SOC in real time;

[0066] S2, detecting whether the instruction change exceeds the instruction dead zone according to the data;

[0067] S3, when the detected instruction change does not exceed the instruction dead zone, superimposing the new instruction and the old instruction of the read unit instruction;

[0068] S4, when the detected instruction change exceeds the instruction dead zone, the read unit instruction is treated as a new instruction and the adjustment processing of stage 1, stage 2, and stage 3 is performed in sequence;

[0069] S4 specifically includes:

[0070] S41, the stage 1 includes taking the read unit instruction as a new instruction, and detecting whether the combined output Ps reaches the target output through SOC, and entering stage 2 when the target output is reached; the combined output Ps includes the unit output Pj and the energy storage output Pe;

[0071] S42, the stage 2 includes, according to the new instruction, detecting whether the unit output reaches the target output through SOC, and entering stage 3 when the target output is reached;

[0072] S43, the stage 3 includes: according to the new instruction, detecting whether the unit output reaches the target output through SOC; detecting the difference between the unit output and the unit instruction, if it is greater than the set steady-state dead zone, adjusting the energy storage output at the set unit adjustment rate, if the unit output is greater than the instruction, reducing the energy storage output, and if the unit output is less than the unit instruction, increasing the energy storage output.

[0073] First, some professional terms involved in the embodiments of the present invention are explained:

[0074] Unit command: Unit active power command from AGC (automatic generation control system);

[0075] Unit output: real-time active power of the generator set;

[0076] Energy storage output: real-time active power of energy storage;

[0077] Energy storage SOC: percentage of remaining energy storage capacity;

[0078] Unit AGC input signal: whether the unit is engaged in tracking AGC instructions;

[0079] The unit's primary frequency regulation action signal: a signal indicating whether the unit is performing primary frequency regulation;

[0080] The following parameter data needs to be obtained from the system:

[0081] Unit regulation rate: Mw / min, the unit regulation rate under normal circumstances;

[0082] Energy storage setting adjustment rate: Mw / min, the tracking rate of the unit in stage 1;

[0083] SOC over-limit recovery rate: Mw / min, the power zeroing rate of energy storage in the stable stage;

[0084] Energy storage stable recovery rate: Mw / min, the power zeroing rate of energy storage in the stable stage;

[0085] Command dead zone: the minimum amount of change in the unit command. A value greater than this indicates the arrival of a new command.

[0086] Target dead zone: When the difference between the output and the command is less than this value, it is considered that the target output has been reached;

[0087] SOC upper limit: set the SOC upper limit value of energy storage charging;

[0088] SOC lower limit: set the SOC lower limit of energy storage discharge;

[0089] SOC upper limit buffer: Set the SOC upper limit buffer for energy storage charging. This value is less than the set SOC upper limit. When the SOC exceeds the upper limit, it needs to be discharged until the SOC is less than the SOC upper limit buffer before the SOC returns to normal;

[0090] SOC lower limit buffer: Set the SOC lower limit buffer for energy storage charging. This value is greater than the set SOC lower limit. When the SOC exceeds the lower limit, it needs to be charged until the SOC is greater than the lower limit buffer before the SOC returns to normal;

[0091] Balanced discharge power: When the SOC exceeds the upper limit, the maximum discharge power is set;

[0092] Balanced charging power: When the SOC exceeds the lower limit, the maximum charging power is set.

[0093] According to the method of the present invention, firstly, through S1, the parameters are initialized, and the data of the unit instruction, unit output, energy storage output, and energy storage SOC are read in real time;

[0094] Next, according to S2, based on the data, it is detected whether the instruction change exceeds the instruction dead zone;

[0095] When the detected instruction change does not exceed the instruction dead zone, according to S3, the new instruction is superimposed on the old instruction. After superimposing the old instruction, no matter which stage is currently in, the new instruction target value can be used and the instruction can be tracked well. This method can improve the instruction tracking accuracy and the auxiliary frequency modulation K value;

[0096] Energy storage has SOC limits and cannot be charged or discharged indefinitely. There will always be a time when the SOC upper or lower limit is reached and charging or discharging is impossible. Therefore, an SOC detection processing module is added to each stage of regulation. The SOC detection module is described as follows:

[0097] Determine the current adjustment type. If it is an upward adjustment, the energy storage needs to be discharged, and determine whether the SOC exceeds the lower limit. If it does not exceed the lower limit, the SOC test passes, and the energy storage can continue to increase the discharge power. Similarly, if it is a downward adjustment, the energy storage needs to be charged, and determine whether the SOC exceeds the upper limit. If it does not exceed the upper limit, the SOC test passes, and the energy storage can continue to increase the charging power.

[0098] Here, the judgment of SOC over-limit takes into account the regulation rate of energy storage, and a pre-over-limit judgment is performed when the energy storage SOC is between the lower limit and the lower limit buffer zone.

[0099] When the energy storage is discharging:

[0100] The current discharge power of the energy storage is Pd,

[0101] The current SOC of energy storage is Sc,

[0102] The lower limit of energy storage SOC is Sl,

[0103] The rated capacity of energy storage is Ke,

[0104] The amount of energy to be discharged is Kd,

[0105] Kd=0.01*(Sc-Sl)*Ke,

[0106] The SOC limit recovery rate of energy storage is V3.

[0107] Calculate the time T0 (seconds) required for the energy storage power to recover to 0 power,

[0108] T0=Pd / V3,

[0109] Calculate the integrated discharge amount in the T0 period, Kd',

[0110]

[0111] When Kd'>=Kd, it is considered that the SOC is about to exceed the limit, and the energy storage power needs to be gradually adjusted to 0 power according to the SOC limit recovery rate V3.

[0112] The same applies when charging.

[0113] like Figure 5 As shown, when the adjustment type is upward adjustment and the SOC exceeds the lower limit, the SOC detection fails, and the energy storage is controlled to reduce discharge or increase charging according to the SOC over-limit recovery rate until the energy storage reaches a balanced charging power, until the SOC does not exceed the lower limit and is greater than the lower limit buffer.

[0114] When the adjustment type is downward adjustment and the SOC exceeds the upper limit, the SOC detection fails, and the energy storage is controlled to reduce charging or increase discharging according to the SOC limit recovery rate until the energy storage reaches a balanced discharge power, until the SOC does not exceed the upper limit and is less than the upper limit buffer.

[0115] When the detected instruction change exceeds the instruction dead zone, according to S4, the read unit instruction is treated as a new instruction and the adjustment processing of stage 1, stage 2, and stage 3 is performed in sequence;

[0116] Specifically, Figure 2 As shown, S41, the stage 1 specifically includes:

[0117] S411, taking the read unit instruction as a new instruction and detecting it through the SOC;

[0118] S412, detecting whether the combined output Ps reaches the target output through SOC detection;

[0119] S413, if the combined output Ps reaches the target output, then enter stage 2;

[0120] S414: For the combined output Ps that does not reach the target output, the energy storage output increase Pa is calculated by using the set energy storage adjustment rate.

[0121] First, determine if the SOC test is passed. If the test is passed, execute stage 1. Detect whether the combined output Ps (unit output Pj + energy storage output Pe) reaches the target output. If it reaches the target output, enter stage 2. If it does not reach the target output, the energy storage output increase Pa (positive charge and negative discharge) is calculated by the set energy storage adjustment rate. The algorithm cycle is set to 1S (the same below).

[0122] Pa=±V1 / 60,

[0123] V1 is the energy storage setting adjustment rate for stage 1.

[0124] If it is an upward adjustment, the discharge power is increased or the charging power is reduced. If it is a downward adjustment, the charging power is increased or the discharge power is reduced. The target power of energy storage is Pt=Pe+Pa, and the target power of energy storage is sent to the energy storage system.

[0125] Specifically, Figure 3 As shown, S42, the stage 2 specifically includes:

[0126] S421, taking the read unit instruction as a new instruction and detecting it through the SOC;

[0127] S422, through SOC detection, detecting whether the unit output Ps reaches the command value;

[0128] S423, if the unit output Ps reaches the command value, then enter stage 3;

[0129] S424, when the unit output Ps does not reach the command value, the set unit adjustment rate is used to obtain the energy storage output reduction Pa opposite to the unit output increase or decrease, until the energy storage output is 0.

[0130] First, determine if the SOC test is passed. If the test is passed, execute stage 2. Detect whether the unit output reaches the target output. If it reaches the target output, enter stage 3. If it does not reach the target output, the energy storage output reduction Pa (positive charge and negative discharge) opposite to the increase or decrease of the unit output is obtained by the set unit adjustment rate until the energy storage output is 0.

[0131] Pa=±V2 / 60,

[0132] V2 is the energy storage setting regulation rate in stage 2, i.e. the unit regulation rate.

[0133] The target power of energy storage is Pt = Pe + Pa. The target power of energy storage is sent to the energy storage system, such as Figure 4 As shown, S43, the stage 3 specifically includes:

[0134] S431, taking the read unit instruction as a new instruction and detecting it through the SOC;

[0135] S432, detect the deviation between the unit output and the unit command through SOC detection;

[0136] S433, if the unit command deviation is greater than the set steady-state dead zone of the unit, the energy storage output is adjusted by the set unit adjustment rate;

[0137] S434, for the unit command deviation being less than the set steady-state dead zone of the unit, the energy storage output reduction Pa is calculated by using the set energy storage steady recovery rate until the energy storage output is 0.

[0138] First determine whether the SOC test has passed, and if the test has passed, execute stage 3. Detect the difference between the unit output and the unit command. If it is greater than the set steady-state dead zone, adjust the energy storage output at the set unit adjustment rate. If the unit output is greater than the command, reduce the energy storage output. If the unit output is less than the unit command, increase the energy storage output.

[0139] Pa=±V2 / 60,

[0140] V2 is the energy storage setting regulation rate in stage 2, i.e. the unit regulation rate.

[0141] If the difference between the unit output and the unit command is less than the set steady-state dead zone, the energy storage output reduction Pa (positive charging and negative discharging) is calculated according to the set energy storage steady recovery rate until the energy storage output is 0.

[0142] Pa=±V4 / 60,

[0143] V4 is the steady recovery rate of energy storage in stage 3.

[0144] Access the primary frequency regulation action signal of the unit. When the primary frequency regulation is activated, the system locks the energy storage adjustment to maintain the energy storage output unchanged to avoid affecting the primary frequency regulation effect of the unit.

[0145] By controlling the energy storage to assist the unit in auxiliary frequency regulation through this method, the K value of the unit can be increased, and the daily SOD value of the energy storage, that is, the depth of charge and discharge, that is, the difference between the upper and lower limits of the daily SOC, can be reduced. At the same time, it can also effectively reduce the number of daily charge and discharge cycles of the energy storage.

[0146] Through this method, the characteristics of rapid response of energy storage charge and discharge are utilized to combine the energy storage output with the unit output into the overall unit output, improve the unit's regulation rate index, response time index, regulation accuracy index, improve the unit K value, reduce the energy storage daily SOD value, that is, the depth of charge and discharge, that is, the difference between the upper and lower limits of the daily SOC, and also effectively reduce the number of daily charge and discharge cycles of energy storage. In addition, the addition of energy storage equipment can bear the random load component and part of the pulsating component, and the instantaneous charge and discharge function of energy storage can avoid frequent unit action, reduce unit wear and extend the unit service life.

[0147] Embodiment 2:

[0148] In a second aspect, an embodiment of the present invention provides a device for increasing the K value of a thermal power unit based on energy storage charging and discharging, comprising:

[0149] Data acquisition module, used to initialize parameters and read data of unit instructions, unit output, energy storage output, and energy storage SOC in real time;

[0150] An instruction detection module, used for detecting whether the instruction change exceeds the instruction dead zone according to the data;

[0151] An instruction superposition module, used for superimposing the new instruction of the read unit instruction with the old instruction when the detected instruction change does not exceed the instruction dead zone;

[0152] An adjustment processing module, used for, when the detected instruction change exceeds the instruction dead zone, sequentially performing adjustment processing of stage 1, stage 2, and stage 3 on the read unit instruction as a new instruction;

[0153] The adjustment processing module specifically includes:

[0154] Phase 1 unit, the phase 1 includes taking the read unit command as a new command, and detecting whether the combined output Ps reaches the target output through SOC, and entering phase 2 when the target output is reached; the combined output Ps includes the unit output Pj and the energy storage output Pe;

[0155] Phase 2 unit, wherein the phase 2 includes, according to the new instruction, detecting whether the unit output reaches the target output through SOC, and entering phase 3 when the target output is reached;

[0156] The stage 3 unit includes: according to the new instruction, detecting whether the unit output reaches the target output through SOC; detecting the difference between the unit output and the unit instruction, if it is greater than the set steady-state dead zone, adjusting the energy storage output at the set unit adjustment rate, if the unit output is greater than the instruction, reducing the energy storage output, and if the unit output is less than the unit instruction, increasing the energy storage output.

[0157] Specifically, Figure 2 As shown, the stage 1 unit, the stage 1 specifically includes:

[0158] A first detection subunit, used for taking the read unit instruction as a new instruction and performing detection through the SOC;

[0159] The target detection subunit is used to detect whether the combined output Ps reaches the target output through SOC detection;

[0160] The first stage output subunit is used for entering stage 2 when the combined output Ps reaches the target output;

[0161] The rate regulating subunit is used to obtain the energy storage output increase Pa by setting the energy storage regulation rate when the combined output Ps does not reach the target output.

[0162] Specifically, Figure 3 As shown, S42, the stage 2 specifically includes:

[0163] A second detection subunit is used to use the read unit instruction as a new instruction and perform detection through the SOC;

[0164] The command detection subunit is used to detect whether the unit output Ps reaches the command value through SOC detection;

[0165] The second stage output subunit is used for the unit output Ps reaching the command value, then entering stage 3;

[0166] The energy storage regulation subunit is used to set the unit regulation rate to obtain the energy storage output reduction Pa which is opposite to the increase or decrease of the unit output when the unit output Ps does not reach the command value, until the energy storage output is 0.

[0167] Specifically, Figure 4 As shown, S43, the stage 3 specifically includes:

[0168] A third detection subunit is used to use the read unit command as a new command and perform detection through the SOC;

[0169] Deviation detection subunit, used to detect the deviation between the unit output and the unit command through SOC detection;

[0170] The output regulating subunit is used to regulate the energy storage output by a set unit regulating rate when the unit instruction deviation is greater than a set steady-state dead zone of the unit;

[0171] The dead zone processing subunit is used to obtain the energy storage output reduction Pa by setting the energy storage steady recovery rate when the unit command deviation is less than the unit set steady-state dead zone, until the energy storage output is 0.

[0172] Embodiment three:

[0173] This embodiment further provides an electronic device, including a memory and a processor, wherein the memory is used to store one or more computer instructions, wherein the one or more computer instructions implement the method of embodiment 1 when executed by the processor;

[0174] In practical applications, the processor can be an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a controller, a microcontroller unit (MCU), a microprocessor or other electronic components to execute the methods in the above embodiments.

[0175] The method implemented in this embodiment is as described in Embodiment 1.

[0176] Embodiment 4:

[0177] This embodiment further provides a computer storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by one or more processors, the method of the first embodiment is implemented;

[0178] Among them, the computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, disk or optical disk.

[0179] The method implemented in this embodiment includes:

[0180] The method implemented in this embodiment is as described in Embodiment 1.

[0181] In the several embodiments provided in the embodiments of the present invention, it should be understood that the disclosed system and method can also be implemented in other ways. The system and method embodiments described above are merely illustrative.

[0182] It should be noted that, in this article, the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. The terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0183] Although the embodiments disclosed in the present invention are as above, the above contents are only embodiments adopted for facilitating the understanding of the present invention and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A method for improving the K value of a thermal power unit based on energy storage charging and discharging, characterized in that: include: S1, initialize parameters and read the data of unit instructions, unit output, energy storage output, and energy storage SOC in real time; S2, detecting whether the instruction change exceeds the instruction dead zone according to the data; S3, when the detected instruction change does not exceed the instruction dead zone, superimposing the new instruction and the old instruction of the read unit instruction; S4, when the detected instruction change exceeds the instruction dead zone, the read unit instruction is treated as a new instruction and the adjustment processing of stage 1, stage 2, and stage 3 is performed in sequence; S4 specifically includes: S41, the stage 1 includes, taking the read unit instruction as a new instruction, and detecting whether the combined output Ps reaches the target output through SOC, and entering stage 2 when the target output is reached; the combined output Ps includes the unit output Pj and the energy storage output Pe; the stage 1 specifically includes: S411, taking the read unit instruction as a new instruction, and detecting it through SOC; S412, detecting whether the combined output Ps reaches the target output through SOC detection; S413, if the combined output Ps reaches the target output, entering stage 2; S414, if the combined output Ps does not reach the target output, obtaining the energy storage output increase Pa through the set energy storage adjustment rate; S42, the stage 2 includes, according to the new instruction, detecting whether the unit output reaches the target output through SOC, and entering stage 3 when the target output is reached; The stage 2 specifically includes: S421, taking the read unit instruction as a new instruction and detecting it through the SOC; S422, through SOC detection, detecting whether the unit output Ps reaches the command value; S423, if the unit output Ps reaches the command value, then enter stage 3; S424, if the unit output Ps does not reach the command value, the set unit adjustment rate is used to obtain the energy storage output reduction Pa opposite to the unit output increase or decrease, until the energy storage output is 0; S43, the stage 3 includes: according to the new instruction, detecting whether the unit output reaches the target output through SOC; detecting the difference between the unit output and the unit instruction, if it is greater than the set steady-state dead zone, adjusting the energy storage output at the set unit adjustment rate, if the unit output is greater than the instruction, reducing the energy storage output, and if the unit output is less than the unit instruction, increasing the energy storage output; When the energy storage is discharging: The current discharge power of the energy storage is Pd, The current SOC of energy storage is Sc, The lower limit of energy storage SOC is Sl, The rated capacity of energy storage is Ke, The amount of energy to be discharged is Kd, Kd = 0.01*(Sc - Sl)*Ke, The SOC over-limit recovery rate of energy storage is V3. Calculate the time T0 required for the energy storage power to recover to 0 power, T0 = ​​Pd / V3, Calculate the integrated discharge amount in the T0 period, Kd', When Kd'>= Kd, it is considered that the SOC is about to exceed the limit, and the energy storage power needs to be gradually adjusted to 0 power according to the SOC limit recovery rate V3.

2. The method for improving the K value of a thermal power unit based on energy storage charging and discharging according to claim 1 is characterized in that: S43, the stage 3 specifically includes: S431, taking the read unit instruction as a new instruction and detecting it through the SOC; S432, through SOC detection, detects the deviation between the unit output and the unit command; S433, if the unit command deviation is greater than the set steady-state dead zone of the unit, the energy storage output is adjusted by the set unit adjustment rate; S434, for the unit command deviation being less than the set steady-state dead zone of the unit, the energy storage output reduction Pa is calculated by using the set energy storage steady recovery rate until the energy storage output is 0.

3. A device for increasing the K value of a thermal power unit based on energy storage charging and discharging, characterized in that: include: Data acquisition module, used to initialize parameters and read data of unit instructions, unit output, energy storage output, and energy storage SOC in real time; An instruction detection module, used for detecting whether the instruction change exceeds the instruction dead zone according to the data; An instruction superposition module, used for superimposing the new instruction of the read unit instruction with the old instruction when the detected instruction change does not exceed the instruction dead zone; An adjustment processing module, used for, when the detected instruction change exceeds the instruction dead zone, sequentially performing adjustment processing of stage 1, stage 2, and stage 3 on the read unit instruction as a new instruction; The adjustment processing module specifically includes: Phase 1 unit, the phase 1 includes taking the read unit instruction as a new instruction, and detecting whether the combined output Ps reaches the target output through SOC, and entering phase 2 when the target output is reached; the combined output Ps includes the unit output Pj and the energy storage output Pe; the phase 1 specifically includes: A first detection subunit, used for taking the read unit instruction as a new instruction and performing detection through the SOC; The target detection subunit is used to detect whether the combined output Ps reaches the target output through SOC detection; The first stage output subunit is used for entering stage 2 when the combined output Ps reaches the target output; The rate regulating subunit is used to obtain the energy storage output increase Pa by setting the energy storage regulating rate when the combined output Ps does not reach the target output; Phase 2 unit, wherein the phase 2 includes, according to the new instruction, detecting whether the unit output reaches the target output through SOC, and entering phase 3 when the target output is reached; The stage 2 specifically includes: A second detection subunit is used to use the read unit command as a new command and perform detection through the SOC; The command detection subunit is used to detect whether the unit output Ps reaches the command value through SOC detection; The second stage output subunit is used for the unit output Ps reaching the command value, then entering stage 3; The energy storage regulation subunit is used to set the unit regulation rate to obtain the energy storage output reduction Pa opposite to the increase or decrease of the unit output when the unit output Ps does not reach the command value, until the energy storage output is 0; The stage 3 unit includes: according to the new instruction, detecting whether the unit output reaches the target output through SOC; detecting the difference between the unit output and the unit instruction, if it is greater than the set steady-state dead zone, adjusting the energy storage output at the set unit adjustment rate, reducing the energy storage output when the unit output is greater than the instruction, and increasing the energy storage output when the unit output is less than the unit instruction; When the energy storage is discharging: The current discharge power of the energy storage is Pd, The current SOC of energy storage is Sc, The lower limit of energy storage SOC is Sl, The rated capacity of energy storage is Ke, The amount of energy to be discharged is Kd, Kd = 0.01*(Sc - Sl)*Ke, The SOC over-limit recovery rate of energy storage is V3. Calculate the time T0 required for the energy storage power to recover to 0 power, T0 = ​​Pd / V3, Calculate the integrated discharge amount in the T0 period, Kd', When Kd'>= Kd, it is considered that the SOC is about to exceed the limit, and the energy storage power needs to be gradually adjusted to 0 power according to the SOC limit recovery rate V3.

4. The device for increasing the K value of a thermal power unit based on energy storage charging and discharging according to claim 3 is characterized in that: S43, the stage 3 specifically includes: A third detection subunit is used to use the read unit instruction as a new instruction and perform detection through the SOC; Deviation detection subunit, used to detect the deviation between the unit output and the unit command through SOC detection; The output regulation subunit is used to adjust the energy storage output by a set unit regulation rate when the unit instruction deviation is greater than a set steady-state dead zone of the unit; The dead zone processing subunit is used to obtain the energy storage output reduction Pa by setting the energy storage steady recovery rate when the unit command deviation is less than the unit set steady-state dead zone, until the energy storage output is 0.

5. An electronic device, characterized in that: It comprises a memory and a processor, wherein the memory is used to store one or more computer instructions, wherein when the one or more computer instructions are executed by the processor, a method for improving the K value of a thermal power unit based on energy storage charging and discharging as described in any one of claims 1 to 2 above is implemented.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by the processor, it is used to implement the method for improving the K value of a thermal power unit based on energy storage charging and discharging as described in any one of claims 1-2 above.

Images