Primary frequency modulation optimization evaluation guidance system and operation method thereof

Abstract

The invention relates to the technical field of primary frequency modulation, in particular to a primary frequency modulation optimization evaluation guidance system and an operation method thereof.The primary frequency modulation optimization evaluation guidance system comprises an external module, a frequency transmitting device, a DCS cabinet, a PIC controller, an industrial personal computer, a wiring module, an anti-interference module, a monitoring module, a heat dissipation module and an electricity storage module; the frequency transmitting device, the DCS cabinet, the PIC controller and the industrial personal computer are connected with the wiring module, and the anti-interference module is connected with the wiring module and the external module. By means of cooperation among the anti-interference module, the monitoring module and the heat dissipation module, external electromagnetic interference caused when the wiring module transmits electric signals can be reduced; the situation that signal transmission among the frequency transmitting device, the DCS cabinet, the PIC controller and the industrial personal computer deviates due to the fact that the electric signals are interfered is avoided, and then the operation stability of the primary frequency modulation optimization evaluation guidance system is improved.

Description

Technical Field

[0001] The present invention relates to the field of primary frequency modulation technology, and specifically to a primary frequency modulation optimization evaluation guidance system and an operation method thereof. Background Art

[0002] Primary frequency regulation refers to the automatic control process in which the control system of the units in the power grid automatically controls the increase or decrease of the active power of the units, limits the change of the power grid frequency, and maintains a stable power grid frequency once the power grid frequency deviates from the rated value. Primary frequency regulation is very important for the power grid to achieve frequency stability. For this reason, the regulatory bureaus under the National Energy Administration have respectively formulated the "Implementation Rules for the Management of Grid-connected Operation of Regional Power Plants" and the "Implementation Rules for the Management of Auxiliary Services of Grid-connected Power Plants", which provide detailed explanations of the relevant contents of primary frequency regulation and propose assessment management.

[0003] In the primary frequency regulation system, the principle is based on the relationship between frequency and load. In the power system, changes in load will cause fluctuations in system frequency. The primary frequency regulation system measures the system frequency, compares it with the set rated frequency, and then automatically adjusts the output of the generator set based on the comparison result to restore the system frequency to the rated value;

[0004] Specifically, when the system load increases, the system frequency will decrease, and the primary frequency regulation system will detect this change and automatically increase the output of the generator set to increase the system frequency. Conversely, when the system load decreases, the system frequency will increase, and the primary frequency regulation system will reduce the output of the generator set to reduce the system frequency. In this way, the primary frequency regulation system can effectively maintain the stability of the system frequency. In the primary frequency regulation system, electrical signal transmission is mainly relied on, and the stability of signal transmission is extremely important. The existing primary frequency regulation system is used in the power system, and there are a large number of electromagnetic interference sources in the power system, such as high-voltage equipment, frequency converters, etc. These interferences may affect the normal operation of the primary frequency regulation optimization evaluation guidance system, resulting in inaccurate data collection or system malfunction. In view of this, we provide a primary frequency regulation optimization evaluation guidance system and its operation method. Summary of the invention

[0005] The purpose of the present invention is to provide a primary frequency modulation optimization evaluation and guidance system, aiming to solve the problem in the prior art that the primary frequency modulation system mainly relies on electrical signal transmission, and thus the stability of signal transmission is extremely important. The existing primary frequency modulation system is used in the power system, and there are a large number of electromagnetic interference sources in the power system, such as high-voltage equipment, frequency converters, etc. These interferences may affect the normal operation of the primary frequency modulation optimization evaluation and guidance system, resulting in inaccurate data collection or system malfunction. In view of this, we provide a primary frequency modulation optimization evaluation and guidance system and its operation method.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a primary frequency modulation optimization evaluation and guidance system, comprising an external module, a frequency transmitter, a DCS cabinet, a PIC controller, an industrial computer, a wiring module, an anti-interference module, a monitoring module, a heat dissipation module and a power storage module, wherein the external module is connected to the frequency transmitter and the PIC controller, the frequency transmitter, the DCS cabinet, the PIC controller and the industrial computer are connected to the wiring module, the anti-interference module is connected to the wiring module and the external module, and the monitoring module, the heat dissipation module and the power storage module are connected to the DCS cabinet.

[0007] As a preferred primary frequency regulation optimization evaluation and guidance system of the present invention, the external module is connected to the frequency transmitter and the PIC controller using a signal cable. The external module is connected to the frequency transmitter to obtain the operating data of the external power grid and the generator set. The external module is connected to the PIC controller to execute the instructions of the DCS cabinet, generate specific frequency regulation control instructions, and send them to the generator set.

[0008] As a preferred primary frequency modulation optimization evaluation and guidance system of the present invention, the frequency transmitter is used to measure the frequency value of the power grid in real time and convert it into a processable electrical signal. The DCS cabinet is responsible for receiving and processing signals from the frequency transmitter and other equipment, executing control logic, and issuing control instructions. The PIC controller is used to execute specific control logic, such as the generation and sending of frequency modulation instructions. The industrial computer is based on software platforms such as Python and is used to record, store and analyze data such as power grid frequency values ​​and real-time trends in real time, perform optimization calculations and assessments, and finally present the results to power plant operators.

[0009] As a preferred primary frequency modulation optimization evaluation guidance system of the present invention, the wiring module uses Ethernet cables and electric wires to connect the frequency transmitter, DCS cabinet, PIC controller and industrial computer. Connecting the frequency transmitter and DCS cabinet with the wiring module allows the DCS cabinet to obtain the electrical signal converted by the frequency transmitter, and execute control logic and issue control instructions. Connecting the DCS cabinet and PIC controller with the wiring module allows the PIC controller to interact with the DCS cabinet data and execute specific control logic, such as generation and sending of frequency modulation instructions. Connecting the PIC controller and industrial computer with the wiring module allows the industrial computer to record, store and analyze power grid frequency values, real-time trends and other data in real time to perform optimization calculations and assessments.

[0010] As a preferred primary frequency modulation optimization evaluation and guidance system of the present invention, the anti-interference module adopts an anti-interference shielder to connect with the wiring module and the external module, and the anti-interference module is connected with the wiring module and the external module to absorb, reflect and scatter electromagnetic waves.

[0011] As a preferred primary frequency modulation optimization evaluation and guidance system of the present invention, the monitoring module uses a temperature detector of model: MIK-R200T connected to the DCS cabinet to obtain the temperature status in the DCS cabinet.

[0012] As a preferred embodiment of the primary frequency modulation optimization evaluation and guidance system of the present invention, the heat dissipation module uses a heat dissipation fan of model RD25489 connected to the DCS cabinet to cool the DCS cabinet.

[0013] As a preferred primary frequency modulation optimization evaluation and guidance system of the present invention, the power storage module adopts a battery to connect with the wires in the wiring module, and the power storage module can supply power to the frequency transmitter, DCS cabinet, PIC controller and industrial computer.

[0014] As an operation method of a primary frequency modulation optimization evaluation and guidance system of the present invention, the method comprises the following steps: S1, using an external module to collect and obtain data of an external power grid and a generator set, and transmitting the data to a frequency transmitter and frequency modulation instruction data received by a PIC controller, thereby modulating the data of the generator set; S2, then, the frequency transmitter is used to measure the frequency value of the power grid in real time and convert it into a processable electrical signal; S3, then, the DCS cabinet receives and processes the signal from the frequency transmitter, executes the control logic, and issues a control instruction;

[0015] S4. Then, the DCS cabinet and the PIC controller exchange data through the wiring module and execute specific control logic, such as the generation and sending of frequency modulation instructions; S5. Finally, the industrial computer is connected to the DCS cabinet, and the industrial computer obtains the data of the DCS cabinet based on software platforms such as Python, which is used to record, store and analyze the power grid frequency value, real-time trend and other data in real time, perform optimization calculations and assessments, and finally present the results to the power plant operators.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention utilizes the cooperation among the anti-interference module, the monitoring module and the heat dissipation module to reduce the external electromagnetic interference of the wiring module when transmitting the electric signal, avoids the occurrence of deviation in signal transmission between the frequency transmitter, the DCS cabinet, the PIC controller and the industrial computer caused by the interference of the electric signal, and thus improves the stability of the operation of the primary frequency modulation optimization evaluation and guidance system. At the same time, the monitoring module and the heat dissipation module can perform heat dissipation treatment on the frequency transmitter, the DCS cabinet, the PIC controller and the industrial computer, and the power storage module can provide subsequent electric energy for the frequency transmitter, the DCS cabinet, the PIC controller and the industrial computer when the primary frequency modulation optimization evaluation and guidance system is running in a power outage, thereby avoiding the occurrence of power outage damage to the frequency transmitter, the DCS cabinet, the PIC controller and the industrial computer in the primary frequency modulation optimization evaluation and guidance system, which affects the normal operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the system module structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the process structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the connection structure of the wiring module of the present invention.

[0022] In the figure: 1. External module; 2. Frequency transmitter; 3. DCS cabinet; 4. PIC controller; 5. Industrial computer; 6. Wiring module; 7. Anti-interference module; 8. Monitoring module; 9. Heat dissipation module; 10. Power storage module. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-3The present invention provides the following technical solutions: a primary frequency modulation optimization evaluation and guidance system, comprising an external module 1, a frequency transmitter 2, a DCS cabinet 3, a PIC controller 4, an industrial computer 5, a wiring module 6, an anti-interference module 7, a monitoring module 8, a heat dissipation module 9 and a power storage module 10, the external module 1 is connected to the frequency transmitter 2 and the PIC controller 4, the frequency transmitter 2, the DCS cabinet 3, the PIC controller 4 and the industrial computer 5 are connected to the wiring module 6, the anti-interference module 7 is connected to the wiring module 6 and the external module 1, and the monitoring module 8, the heat dissipation module 9 and the power storage module 10 are connected to the DCS cabinet 3.

[0025] Preferably: the external module 1 is connected to the frequency transmitter 2 and the PIC controller 4 by a signal cable. The external module 1 is connected to the frequency transmitter 2 to obtain the operating data of the external power grid and the generator set. The external module 1 is connected to the PIC controller 4 to execute the instructions of the DCS cabinet 3, generate specific frequency modulation control instructions, and send them to the generator set.

[0026] Preferably: the frequency transmitter 2 is used to measure the frequency value of the power grid in real time and convert it into a processable electrical signal, the DCS cabinet 3 is responsible for receiving and processing signals from the frequency transmitter and other equipment, executing control logic, and issuing control instructions, the PIC controller 4 is used to execute specific control logic, such as the generation and sending of frequency modulation instructions, and the industrial computer 5 is based on software platforms such as Python and is used to record, store and analyze power grid frequency values, real-time trends and other data in real time, perform optimization calculations and assessments, and finally present the results to the power plant operators.

[0027] Preferably: the wiring module 6 uses Ethernet cables and electrical wires to connect the frequency transmitter 2, the DCS cabinet 3, the PIC controller 4 and the industrial computer 5. The wiring module 6 is used to connect the frequency transmitter 2 and the DCS cabinet 3 so that the DCS cabinet 3 can obtain the electrical signal converted by the frequency transmitter 2, execute the control logic, and issue control instructions. The wiring module 6 is used to connect the DCS cabinet 3 and the PIC controller 4 so that the PIC controller 4 can interact with the DCS cabinet 3 data and execute specific control logic, such as the generation and sending of frequency modulation instructions. The wiring module 6 is used to connect the PIC controller 4 and the industrial computer 5 so that the industrial computer 5 can record, store and analyze the power grid frequency value, real-time trend and other data in real time, and perform optimization calculation and assessment.

[0028] Preferably, the anti-interference module 7 is connected to the wiring module 6 and the external module 1 using an anti-interference shield, so that the anti-interference module 7 is connected to the wiring module 6 and the external module 1 to absorb, reflect and scatter electromagnetic waves.

[0029] Preferably, the monitoring module 8 uses a temperature detector of model MIK-R200T connected to the DCS cabinet 3 to obtain the temperature status inside the DCS cabinet 3 .

[0030] Preferably, the heat dissipation module 9 uses a heat dissipation fan of model RD25489 and is connected to the DCS cabinet 3 to cool the DCS cabinet 3 .

[0031] Preferably, the power storage module 10 is connected to the wires in the wiring module 6 using a storage battery, and the power storage module 10 can supply power to the frequency transmitter 2 , the DCS cabinet 3 , the PIC controller 4 and the industrial computer 5 .

[0032] Specific working principle: During operation, the electrical signals of the on-site power grid and generator set are transmitted to the frequency transmitter 2 through the external module 1, that is, the frequency signal is collected. The collected frequency signal is input into the DCS cabinet 3 through the wiring module 6, and then the DCS cabinet 3 is used to calculate the frequency value for frequency optimization, and then transmitted to the PIC controller 4 through the wiring module 6 to obtain the evaluation model parameters and assessment results, including frequency, load, unit operation mode and main steam pressure, etc. Finally, the assessment results are sent to the industrial computer 5. The industrial computer 5 is based on Python software to realize the functions of Excel storage of assessment data and real-time trend display. Repeat the above steps to present the specific reasons to the power plant operators so as to adjust the operation mode in time. Then, the cooperation between the anti-interference module 7, the monitoring module 8 and the heat dissipation module 9 can be used to reduce The wiring module 6 is subject to external electromagnetic interference when transmitting electrical signals, so as to avoid the occurrence of signal transmission deviation between the frequency transmitter 2, the DCS cabinet 3, the PIC controller 4 and the industrial computer 5 caused by the interference of the electrical signals, thereby improving the stability of the operation of the primary frequency modulation optimization evaluation and guidance system. At the same time, the monitoring module 8 and the heat dissipation module 9 can perform heat dissipation treatment on the frequency transmitter 2, the DCS cabinet 3, the PIC controller 4 and the industrial computer 5, and the power storage module 10 can provide subsequent electric energy for the frequency transmitter 2, the DCS cabinet 3, the PIC controller 4 and the industrial computer 5 when a power outage occurs during the operation of the primary frequency modulation optimization evaluation and guidance system, so as to avoid the occurrence of power outage damage to the frequency transmitter 2, the DCS cabinet 3, the PIC controller 4 and the industrial computer 5 in the primary frequency modulation optimization evaluation and guidance system, which affects the normal operation of the system.

[0033] An operation method of a primary frequency modulation optimization evaluation guidance system comprises the following steps: S1, using an external module 1 to collect and obtain data of an external power grid and a generator set, and transmit the data to a frequency transmitter 2 and the frequency modulation instruction data received by a PIC controller 4, thereby modulating the data of the generator set; S2, then, the frequency transmitter 2 is used to measure the frequency value of the power grid in real time and convert it into a processable electrical signal; S3, then, a DCS cabinet 3 receives and processes the signal from the frequency transmitter 2, executes control logic, and issues control instructions; S4, then, the DCS cabinet 3 and the PIC controller 4 perform data exchange through a wiring module 6, and execute specific control logic, such as the generation and sending of frequency modulation instructions; S5, finally, an industrial computer 5 is connected to the DCS cabinet 3, and the industrial computer 5 obtains the data of the DCS cabinet 3 based on software platforms such as Python, which is used to record, store and analyze the power grid frequency value, real-time trend and other data in real time, perform optimization calculation and assessment, and finally present the results to the power plant operation personnel.

[0034] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A primary frequency modulation optimization evaluation and guidance system, characterized in that: It comprises an external module (1), a frequency transmitter (2), a DCS cabinet (3), a PIC controller (4), an industrial computer (5), a wiring module (6), an anti-interference module (7), a monitoring module (8), a heat dissipation module (9) and a power storage module (10); The external module (1) is connected to the frequency transmitter (2) and the PIC controller (4); the frequency transmitter (2), the DCS cabinet (3), the PIC controller (4) and the industrial computer (5) are connected to the wiring module (6); the anti-interference module (7) is connected to the wiring module (6) and the external module (1); and the monitoring module (8), the heat dissipation module (9) and the power storage module (10) are connected to the DCS cabinet (3).

2. The primary frequency modulation optimization evaluation and guidance system according to claim 1, characterized in that: The external module (1) is connected to the frequency transmitter (2) and the PIC controller (4) by a signal cable. The external module (1) is connected to the frequency transmitter (2) to obtain the operation data of the external power grid and the generator set. The external module (1) is connected to the PIC controller (4) to execute the instructions of the DCS cabinet (3), generate specific frequency modulation control instructions, and send them to the generator set.

3. The primary frequency modulation optimization evaluation and guidance system according to claim 1, characterized in that: The frequency transmitter (2) is used to measure the frequency value of the power grid in real time and convert it into a processable electrical signal. The DCS cabinet (3) is responsible for receiving and processing signals from the frequency transmitter and other equipment, executing control logic, and issuing control instructions. The PIC controller (4) is used to execute specific control logic, such as the generation and sending of frequency modulation instructions. The industrial computer (5) is based on software platforms such as Python and is used to record, store and analyze data such as power grid frequency values ​​and real-time trends in real time, perform optimization calculations and assessments, and finally present the results to power plant operators.

4. The primary frequency modulation optimization evaluation and guidance system according to claim 1, characterized in that: The wiring module (6) uses Ethernet cables and electrical wires to connect the frequency transmitter (2), the DCS cabinet (3), the PIC controller (4) and the industrial computer (5). The wiring module (6) connects the frequency transmitter (2) and the DCS cabinet (3) so that the DCS cabinet (3) can obtain the electrical signal converted by the frequency transmitter (2), execute the control logic, and issue a control instruction. The wiring module (6) connects the DCS cabinet (3) and the PIC controller (4) so ​​that the PIC controller (4) and the DCS cabinet (3) can exchange data and execute specific control logic, such as the generation and sending of frequency modulation instructions. The wiring module (6) connects the PIC controller (4) and the industrial computer (5) so that the industrial computer (5) can record, store and analyze data such as power grid frequency values ​​and real-time trends in real time and perform optimization calculations and assessments.

5. The primary frequency modulation optimization evaluation and guidance system according to claim 1 is characterized in that: The anti-interference module (7) is connected to the wiring module (6) and the external module (1) using an anti-interference shield, and the anti-interference module (7) is connected to the wiring module (6) and the external module (1) to absorb, reflect and scatter electromagnetic waves.

6. The primary frequency modulation optimization evaluation and guidance system according to claim 1 is characterized in that: The monitoring module (8) uses a temperature detector of model MIK-R200T, which is connected to the DCS cabinet (3) and is used to obtain the temperature state inside the DCS cabinet (3).

7. The primary frequency modulation optimization evaluation and guidance system according to claim 1, characterized in that: The heat dissipation module (9) uses a heat dissipation fan of model RD25489 and is connected to the DCS cabinet (3) to cool the interior of the DCS cabinet (3).

8. The primary frequency modulation optimization evaluation and guidance system according to claim 1 is characterized in that: The power storage module (10) is connected to the wires in the wiring module (6) using a storage battery, and the power storage module (10) can supply power to the frequency transmitter (2), the DCS cabinet (3), the PIC controller (4) and the industrial computer (5).

9. An operating method of a primary frequency modulation optimization evaluation and guidance system, characterized in that: The following steps are involved: S1, using the external module (1) to collect and obtain data from the external power grid and the generator set, and transmit the data to the frequency transmitter (2) and the frequency modulation instruction data received by the PIC controller (4), thereby modulating the data of the generator set; S2, then, the frequency transmitter (2) is used to measure the frequency value of the power grid in real time and convert it into a processable electrical signal; S3, then, the DCS cabinet (3) receives and processes the signal from the frequency transmitter (2), executes the control logic, and issues a control instruction; S4, then, the DCS cabinet (3) and the PIC controller (4) perform data exchange through the wiring module (6) and execute specific control logic, such as the generation and sending of frequency modulation instructions; S5. Finally, the industrial computer (5) is connected to the DCS cabinet (3). The industrial computer (5) obtains the data of the DCS cabinet (3) based on software platforms such as Python, and is used to record, store and analyze the power grid frequency value, real-time trend and other data in real time, perform optimization calculation and assessment, and finally present the results to the power plant operators.

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