Control method and system for regular alternation of standby equipment of thermal power generating unit

Abstract

The invention discloses a control method and system for regular alternation of standby equipment of a thermal power generating unit. The system comprises a first SR module and the like. The first interlocking switching unit is sequentially connected to the first SR module and the No.1 equipment interlocking switching unit; the second interlocking input / output unit is sequentially connected to the second SR module and the No.2 equipment interlocking input unit; the No.1 equipment interlocking input and the No.2 equipment interlocking input are both connected to the first AND module, and the output end of the first AND module is connected to the dual-equipment interlocking input; the first equipment interlocking input is connected to the first pulse module, the output end of the first pulse module and the dual-equipment interlocking input are connected to the second AND module, and the output end of the second AND module is connected to the first pump as a main pump; and the No.2 equipment is connected to a second pulse module in a chain input manner. According to the invention, the standby devices are adopted to automatically realize the switching operation between the standby devices according to the preset regular alternation time or the change of the start-stop frequency of the devices, so that the requirement of regular automatic alternation between the standby devices is met.

Description

Technical Field

[0001] The invention belongs to the field of intelligent control of thermal power plants, and in particular relates to a control method and system based on regular rotation of backup equipment of thermal power units. Background Art

[0002] With the large-scale advancement of the flexibility transformation and deep peak regulation of thermal power units, it is important to automatically carry out the regular rotation system of equipment involving the "two tickets and three systems" at a fixed time and fixed frequency. Among them, the "two tickets and three systems" are the basic systems used in the power industry to ensure safe production, including operation tickets, work tickets, shift systems, patrol inspection systems and equipment regular test rotation systems. At present, there are still the following deficiencies: safety risks, especially when carrying out regular rotation and testing of important equipment, if there is a lack of effective on-site monitoring and accident anticipation, it may cause safety problems; slow response speed, in an emergency, if the spare equipment fails to complete the rotation and test in time, it may affect the emergency response speed of the power plant; operation errors, during the equipment switching process, if the operation is improper or the supervision is not in place, it may cause equipment damage or safety accidents. Based on the above reasons, it is urgent to design a control method and system for the regular rotation of spare equipment of thermal power units, which is an important measure to improve equipment reliability, optimize resource allocation, enhance emergency response capabilities, meet regulatory requirements, cultivate employee skills, promote technological innovation and reduce operation and maintenance costs. Summary of the invention

[0003] The purpose of the present invention is to provide a control method and system for the periodic rotation of backup equipment of a thermal power unit, which automatically realizes the switching operation between backup equipment according to the preset periodic rotation time or the change of the start and stop frequency of the equipment, so as to meet the requirement of regular automatic rotation between backup equipment.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: A control system for regular rotation of standby equipment of a thermal power unit, comprising a first SR module, a second SR module, a first AND module, a first pulse module, a second AND module, a second pulse module and a third AND module; The first interlocking throw and withdraw are connected to the first SR module and the interlocking throw of equipment No. 1 in sequence; the second interlocking throw and withdraw are connected to the second SR module and the interlocking throw of equipment No. 2 in sequence; the interlocking throw of equipment No. 1 and the interlocking throw of equipment No. 2 are both connected to the first AND module, and the output end of the first AND module is connected to the interlocking throw of both equipments; the interlocking throw of equipment No. 1 is connected to the first pulse module, and the output end of the first pulse module and the interlocking throw of both equipments are both connected to the second AND module, and the output end of the second AND module is connected to the No. 1 pump as the main pump; the interlocking throw of equipment No. 2 is connected to the second pulse module, and the output end of the second pulse module and the interlocking throw of both equipments are connected to the third AND module, and the output end of the third AND module is connected to the No. 2 pump as the main pump.

[0005] A further improvement of the present invention is that it further comprises a third pulse module, a fourth pulse module, a first or module, a second or module, a third SR module, a fourth and module and a fifth and module; The rotation duration requests that pump No. 1 be the main pump and be connected to the third pulse module, and the output end of the third pulse module and setting pump No. 1 as the main pump are both connected to the first OR module; the rotation duration requests that pump No. 2 be the main pump and be connected to the fourth pulse module, and the output end of the fourth pulse module and setting pump No. 2 as the main pump are both connected to the second OR module; the output end of the first OR module and the output end of the second OR module are both connected to the third SR module; the output end of the third SR module and the dual equipment interlock are both connected to the fourth AND module and the fifth AND module respectively; the output end of the fourth AND module is connected to pump No. 1 as the main pump, and the output end of the fifth AND module is connected to pump No. 2 as the main pump.

[0006] A further improvement of the present invention is that it also includes a sixth AND module, a first delay module, a first accumulation module, a fifth pulse module, a first comparison module, a third OR module and a first delay break module; The shutdown status of Pump No. 1, the running status of Pump No. 2 and Pump No. 2 as the main pump are all connected to the sixth AND module; the preset rotation duration and the output end of the sixth AND module are connected to the first delay module and the fifth pulse module in sequence; the output end of the first delay-off module and the output end of the sixth AND module are connected to the first accumulation module, and the output end of the first accumulation module and the preset start-up frequency within a single cycle are connected to the first comparison module and the first delay-off module in sequence; the output end of the fifth pulse module and the output end of the first delay-off module are connected to the third OR module, and the output end of the third OR module is connected to the rotation duration requesting Pump No. 1 to be the main pump.

[0007] A further improvement of the present invention is that it also includes a seventh AND module, a second delay module, a second accumulation module, a sixth pulse module, a second comparison module, a fourth OR module and a second delay-break module; the shutdown state of pump No. 2, the operating state of pump No. 1 and pump No. 1 being the main pump are all connected to the seventh AND module, and the output end of the seventh AND module and the preset rotation duration are sequentially connected to the second delay module and the sixth pulse module; the output end of the second delay-break module and the output end of the seventh AND module are both connected to the second accumulation module, and the output end of the second accumulation module and the preset start-up frequency within a single cycle are sequentially connected to the second comparison module and the second delay-break module; the output end of the sixth pulse module and the output end of the second delay-break module are both connected to the fourth OR module, and the output end of the fourth OR module is connected to the rotation duration requesting pump No. 2 to be the main pump.

[0008] A further improvement of the present invention is that it also includes a first fixed value module, a second fixed value module, a third fixed value module, a seventh and module, a third comparison module, a first switching module, a second switching module), a seventh pulse module, a fourth fixed value module, a fifth fixed value module, a sixth fixed value module, an eighth and module, a fourth comparison module, a third switching module, a fourth switching module and an eighth pulse module; The second fixed value module, the third fixed value module and pump No. 1 as the main pump are respectively connected to the N terminal, Y terminal and trigger terminal of the second switching module; the output terminal of the first fixed value module, the second switching module and the dual equipment interlock are respectively connected to the N terminal, Y terminal and trigger terminal of the first switching module; the equipment interlock input signal and the output terminal of the first switching module are connected to the third comparison module, and the output terminal of the third comparison module and the No. 1 equipment interlock are respectively connected to the seventh AND module, the seventh pulse module and the No. 1 equipment joint start instruction; the fifth fixed value module, the sixth fixed value module and pump No. 1 as the main pump are respectively connected to the N terminal, Y terminal and trigger terminal of the fourth switching module; the output terminal of the fourth fixed value module, the fourth switching module and the dual equipment interlock are respectively connected to the N terminal, Y terminal and trigger terminal of the third switching module; the equipment interlock input signal and the output terminal of the third switching module are connected to the fourth comparison module, and the output terminal of the fourth comparison module and the No. 1 equipment interlock are respectively connected to the eighth AND module, the eighth pulse module and the No. 1 equipment joint stop instruction.

[0009] A further improvement of the present invention is that it also includes a first fixed value module, a second fixed value module, a third fixed value module, a first switching module, a second switching module, a ninth AND module, a fifth comparison module, a fifth switching module, a sixth switching module, a ninth pulse module, a fourth fixed value module, a fifth fixed value module, a sixth fixed value module, a tenth AND module, a sixth comparison module, a seventh switching module, an eighth switching module and a tenth pulse module; The second fixed value module, the third fixed value module, and pump No. 2 as the main pump are respectively connected to the N terminal, Y terminal and trigger terminal of the sixth switching module; the output terminal of the first fixed value module, the sixth switching module and the dual equipment interlock are respectively connected to the N terminal, Y terminal and trigger terminal of the fifth switching module; the equipment interlock input signal and the output terminal of the fifth switching module are connected to the fifth comparison module, and the output terminal of the fifth comparison module and the interlock of equipment No. 2 are respectively connected to the ninth AND module, the ninth pulse module and the joint start instruction of equipment No. 2; the fifth fixed value module, the sixth fixed value module and pump No. 2 as the main pump are respectively connected to the N terminal, Y terminal and trigger terminal of the eighth switching module; the output terminal of the fourth fixed value module, the eighth switching module and the dual equipment interlock are respectively connected to the N terminal, Y terminal and trigger terminal of the seventh switching module; the equipment interlock input signal and the output terminal of the seventh switching module are connected to the sixth comparison module, and the output terminal of the sixth comparison module and the interlock of equipment No. 2 are respectively connected to the tenth AND module, the tenth pulse module and the joint stop instruction of equipment No. 2.

[0010] A control method for periodic rotation of standby equipment of a thermal power unit, the method is based on the control system for periodic rotation of standby equipment of a thermal power unit, comprising: When the first interlocking throw and retreat is 1, after the first SR module determines, the interlocking throw of equipment No. 1 is triggered to be 1; when the second interlocking throw and retreat is 1, after the second SR module determines, the interlocking throw of equipment No. 2 is triggered to be 1; When the interlocking input of equipment No. 1 and equipment No. 2 are both 1, after the first and module judgment, the interlocking input of both equipments is triggered to be 1; When the interlocking input of equipment No. 1 and the interlocking input of both equipment No. 2 are both 1, after the second AND module judges, the trigger sets pump No. 1 as the main pump to 1; When the interlocking of equipment No. 2 and the interlocking of both equipment No. 2 and No. 2 are both set to 1, after judgment by the third and module, the trigger sets pump No. 2 as the main pump to 1.

[0011] A further improvement of the present invention is that, it also includes: when the dual-device interlocking is both put into operation at 1, pump No. 1 is set as the main pump, the rotation time requests pump No. 1 to be the main pump, the rotation time requests pump No. 2 to be the main pump, and pump No. 2 is set as the main pump. After judgment by the third SR module, pump No. 1 is triggered to be the main pump 1 or pump No. 2 is triggered to be the main pump 1 according to the status of pumps No. 1 and 2.

[0012] A further improvement of the present invention is that it also includes: when the shutdown state of pump No. 1 is 1, the running state of pump No. 2 is 1, and the state of pump No. 2 is 1 as the main pump, the preset rotation duration is 1 and the triggering rotation duration requesting pump No. 1 to be the main pump is 1; when the preset startup frequency within a single cycle is compared with the first accumulation module and is satisfied, the triggering rotation duration requesting pump No. 1 to be the main pump is 1; When the shutdown status of pump No. 2 is 1, the running status of pump No. 1 is 1, and the status of pump No. 1 as the main pump is 1, the preset rotation duration is 1 and the rotation duration is triggered to request pump No. 2 to be the main pump as 1; when the preset startup frequency within a single cycle is compared with the second accumulation module and is satisfied, the rotation duration is triggered to request pump No. 2 to be the main pump as 1.

[0013] A further improvement of the present invention is that it also includes: when the interlocking input of the No. 1 device is 1, according to the state that the No. 1 pump is the main pump and the dual-device interlocking is both in operation, the value determined by the second switching module and the first switching module is compared with the device interlocking input signal, and finally the interlocking instruction of the No. 1 device is triggered to be 1; When the interlocking input of equipment No. 1 is 1, according to the state that pump No. 1 is the main pump and the interlocking of both equipments is in operation, the value determined by the fourth switching module and the third switching module is compared with the equipment interlocking input signal, and finally the interlocking stop instruction of equipment No. 1 is triggered to 1; When the interlocking input of equipment No. 2 is 1, according to the state that pump No. 2 is the main pump and both equipment interlocks are in operation, the values ​​judged by the sixth switching module and the fifth switching module are compared with the equipment interlocking input signal, and finally the interlocking instruction of equipment No. 2 is triggered to be 1; When the interlocking input of equipment No. 2 is 1, according to the status that pump No. 2 is the main pump and the interlocking of both equipments is in operation, the values ​​judged by the eighth switching module and the seventh switching module are compared with the equipment interlocking input signal, and finally the interlocking stop command of equipment No. 2 is triggered to be 1.

[0014] Compared with the prior art, the present invention has at least the following beneficial technical effects: The present invention provides a control method for periodic rotation of spare equipment of a thermal power unit, which automatically switches between spare equipment according to preset periodic rotation time or changes in equipment start-stop frequency, thereby meeting the requirement of periodic automatic rotation between spare equipment.

[0015] The present invention provides a control system for periodic rotation of standby equipment of a thermal power unit. Whether the standby equipment is interlocked is used as a reference start condition. After both equipment are interlocked, the equipment that is interlocked last is the main equipment. After the main equipment is interlocked according to the process flow, two situations are distinguished: one is that when the operation duration of the main equipment is greater than the preset periodic rotation time, the standby equipment will be automatically switched to operate; the other is that during the operation of the main equipment, when the number of interlocked starts and stops of the process flow is greater than the preset number of starts and stops within the preset periodic rotation time, the standby equipment will be automatically switched to operate.

[0016] In summary, the control method and system for the periodic rotation of standby equipment of a thermal power unit described in the present invention establishes a control method and system for the regular and fixed-frequency automatic rotation of the "two-ticket three-system" equipment, realizes the start and stop and operation of various types of equipment on demand, and automatically controls the switching throughout the process, reducing the workload of operating personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figures 1 to 12 They are respectively the schematic diagrams of the control system for the regular rotation of backup equipment of thermal power units.

[0018] Fig.13 This is a rendering of an embodiment of the present invention.

[0019] Description of reference numerals: 001, first interlocking start / stop, 002, second interlocking start / stop, 003, first SR module, 004, second SR module, 005, No. 1 equipment interlocking start, 006, No. 2 equipment interlocking start, 007, first and module, 008, both equipment interlocking start, 009, first pulse module, 010, second and module, 011, set No. 1 pump as main pump, 012, second pulse module, 013, third and module, 014, set No. 2 pump as main pump, 015, rotation duration request No. 1 pump as main pump, 016, rotation duration request No. 2 pump as main pump, 017, third pulse module, 018, fourth pulse module, 019, first or module Block, 020, second or module, 021, third SR module, 022, fourth and module, 023, fifth and module, 024, pump 1 is the main pump, 025, pump 2 is the main pump, 026, preset rotation duration, 027, pump 1 shutdown status, 028, pump 2 running status, 029, pump 2 shutdown status, 030, pump 1 running status, 031, preset start frequency within a single cycle, 032, sixth and module, 033, first delay module, 034, first accumulation module, 035, fifth pulse module, 036, first comparison module, 037, third or module, 038, first delay module, 039, seventh and module , 040, the second delay module, 041, the second accumulation module, 042, the sixth pulse module, 043, the second comparison module, 044, the fourth or module, 045, the second delay module, 046, the rotation time request No. 1 pump is the main pump, 047, the rotation time request No. 2 pump is the main pump, 048, the equipment interlocking input signal, 049, the first fixed value module, 050, the second fixed value module, 051, the third fixed value module, 052, the fourth fixed value module, 053, the fifth fixed value module, 054, the sixth fixed value module, 055, the seventh and module, 056, the third comparison module, 057, the first switching module, 058, the second switching module, 0 59. The seventh pulse module, 060. The eighth AND module, 061. The fourth comparison module, 062. The third switching module, 063. The fourth switching module, 064. The eighth pulse module, 065. The joint start instruction of the No. 1 equipment, 066. The joint stop instruction of the No. 1 equipment, 067. The ninth AND module, 068. The fifth comparison module, 069. The fifth switching module, 070. The sixth switching module, 071. The tenth AND module, 072. The sixth comparison module, 073. The seventh switching module, 074. The eighth switching module, 075. The ninth pulse module, 076. The tenth pulse module, 077. The joint start instruction of the No. 2 equipment, 078. The joint stop instruction of the No. 2 equipment. DETAILED DESCRIPTION

[0020] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0026] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0027] Various structural schematic diagrams of the embodiments disclosed in the present invention are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0028] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] The present invention designs a control method and system for the regular rotation of spare equipment of thermal power units, establishes a control method and system for the regular rotation system of "two tickets and three systems" equipment, which is automatically carried out at a fixed time and fixed frequency, realizes the start and stop and operation of various types of equipment on demand, and automatically controls the switching throughout the process, thereby reducing the workload of operating personnel.

[0030] For the sake of convenience, the two commonly used pumps are used to represent the regular rotation between the standby equipment of thermal power units.

[0031] Specifically include: Figure 1 and Figure 2The control strategy logic diagram includes: first interlocking start and stop 001, second interlocking start and stop 002, first SR module 003, second SR module 004, No. 1 equipment interlocking start 005, No. 2 equipment interlocking start 006, first and module 007, both equipment interlocking start 008, first pulse module 009, second and module 010, set No. 1 pump as main pump 011, second pulse module 012, third and module 013, set No. 2 pump as main pump 014, rotation time request No. 1 pump as main pump 015, rotation time request No. 2 pump as main pump 016, third pulse module 017, fourth pulse module 018 , first or module 019, second or module 020, third SR module 021, fourth and module 022, fifth and module 023, pump No. 1 is the main pump 024, pump No. 2 is the main pump 025, preset rotation duration 026, pump No. 1 shutdown state 027, pump No. 2 running state 028, pump No. 2 shutdown state 029, pump No. 1 running state 030, preset start frequency within a single cycle 031, sixth and module 032, first delay module 033, first accumulation module 034, fifth pulse module 035, first comparison module 036, third or module 037, first delay module 038, seventh and Module 039, second delay module 040, second accumulation module 041, sixth pulse module 042, second comparison module 043, fourth or module 044, second delay module 045, rotation time request No. 1 pump as main pump 046, rotation time request No. 2 pump as main pump 047, equipment interlocking input signal 048, first fixed value module 049, second fixed value module 050, third fixed value module 051, fourth fixed value module 052, fifth fixed value module 053, sixth fixed value module 054, seventh and module 055, third comparison module 056, first switching module 057, second switching module 05 8. The seventh pulse module 059, the eighth AND module 060, the fourth comparison module 061, the third switching module 062, the fourth switching module 063, the eighth pulse module 064, the No. 1 equipment joint start instruction 065, the No. 1 equipment joint stop instruction 066, the ninth AND module 067, the fifth comparison module 068, the fifth switching module 069, the sixth switching module 070, the tenth AND module 071, the sixth comparison module 072, the seventh switching module 073, the eighth switching module 074, the ninth pulse module 075, the tenth pulse module 076, the No. 2 equipment joint start instruction 077 and the No. 2 equipment joint stop instruction 078.

[0032] Example 1 The control system for periodic rotation of standby equipment of a thermal power unit provided by the present invention comprises: Figures 1 to 5The control strategy logic diagram includes: the first interlocking throw and retreat 001 is connected to the first SR module 003 and the interlocking throw and retreat 005 of equipment No. 1 in sequence; the second interlocking throw and retreat 002 is connected to the second SR module 004 and the interlocking throw and retreat 006 of equipment No. 2 in sequence; the interlocking throw and retreat 005 of equipment No. 1 and the interlocking throw and retreat 006 of equipment No. 2 are both connected to the first AND module 007, and the output end of the first AND module 007 is connected to the double equipment interlocking throw and retreat 008; the interlocking throw and retreat 005 of equipment No. 1 is connected to the first pulse module 009, the output end of the first pulse module 009 and the double equipment interlocking throw and retreat 008 are both connected to the second AND module 010, and the output end of the second AND module 010 is connected to the No. 1 pump as the main pump 011; the No. 2 equipment interlocking throw and retreat 006 is connected to the second pulse module 012, the output end of the second pulse module 012 and the double equipment interlocking throw and retreat 008 are both connected to the third AND module 013, and the output end of the third AND module 013 is connected to the No. 2 pump as the main pump 014.

[0033] Figure 6 The control strategy logic diagram includes: the rotation duration request pump No. 1 is the main pump 015 connected to the third pulse module 017, the output end of the third pulse module 017 and the setting pump No. 1 as the main pump 011 are both connected to the first OR module 019; the rotation duration request pump No. 2 is the main pump 016 connected to the fourth pulse module 018, the output end of the fourth pulse module 018 and the setting pump No. 2 as the main pump 014 are both connected to the second OR module 020; the output end of the first OR module 019 and the output end of the second OR module 020 are both connected to the third SR module 021; the output end of the third SR module 021 and the dual equipment interlocking 008 are respectively connected to the fourth AND module 022 and the fifth AND module 023; the output end of the fourth AND module 022 is connected to pump No. 1 as the main pump 024, and the output end of the fifth AND module 023 is connected to pump No. 2 as the main pump 025.

[0034] Figure 7 and Figure 8The control strategy logic diagram includes: the shutdown state 027 of pump No. 1, the running state 028 of pump No. 2 and the main pump 025 of pump No. 2 are all connected to the sixth AND module 032; the preset rotation duration 026 and the output end of the sixth AND module 032 are connected to the first delay module 033 and the fifth pulse module 035 in sequence; the output end of the first delay module 038 and the output end of the sixth AND module 032 are connected to the first accumulation module 034, the output end of the first accumulation module 034 and the preset start frequency 031 in a single cycle are connected to the first comparison module 036 and the first delay module 038 in sequence; the output end of the fifth pulse module 035 and the output end of the first delay module 038 are connected to the third OR module 037, and the output end of the third OR module 037 is connected to the rotation duration request No. 1 pump is Main pump 046; No. 2 pump shutdown state 029, No. 1 pump running state 030 and No. 1 pump as main pump 024 are all connected to the seventh AND module 039, and the output end of the seventh AND module 039 and the preset rotation duration 026 are connected to the second delay module 040 and the sixth pulse module 042 in sequence; the output end of the second delay interrupt module 045 and the output end of the seventh AND module 039 are connected to the second accumulation module 041, and the output end of the second accumulation module 041 and the preset single-cycle start frequency 031 are connected to the second comparison module 043 and the second delay interrupt module 045 in sequence; the output end of the sixth pulse module 042 and the output end of the second delay interrupt module 045 are connected to the fourth OR module 044, and the output end of the fourth OR module 044 is connected to the rotation duration request No. 2 pump as the main pump 047.

[0035] Fig. 9 and Fig.10The control strategy logic diagram includes: the second fixed value module 050, the third fixed value module 051 and the No. 1 pump as the main pump 024 are respectively connected to the N end, the Y end and the trigger end of the second switching module 058; the first fixed value module 049, the output end of the second switching module 058 and the double equipment interlocking input 008 are respectively connected to the N end, the Y end and the trigger end of the first switching module 057; the equipment interlocking input signal 048 and the output end of the first switching module 057 are connected to the third comparison module 056, and the output end of the third comparison module 056 and the No. 1 equipment interlocking input 005 are sequentially connected to the seventh AND module 055, the seventh pulse module 059 and the No. 1 equipment interlocking start indicator Order 065; the fifth fixed value module 053, the sixth fixed value module 054 and the No. 1 pump as the main pump 024 are respectively connected to the N terminal, Y terminal and trigger terminal of the fourth switching module 063; the fourth fixed value module 052, the output terminal of the fourth switching module 063 and the double equipment interlocking input 008 are respectively connected to the N terminal, Y terminal and trigger terminal of the third switching module 062; the equipment interlocking input signal 048 and the output terminal of the third switching module 062 are both connected to the fourth comparison module 061, and the output terminal of the fourth comparison module 061 and the No. 1 equipment interlocking input 005 are sequentially connected to the eighth AND module 060, the eighth pulse module 064 and the No. 1 equipment joint stop instruction 066.

[0036] Fig.11 and Fig.12 The control strategy logic diagram includes: the second fixed value module 050, the third fixed value module 051, and the No. 2 pump as the main pump 025 are respectively connected to the N end, the Y end and the trigger end of the sixth switching module 070; the first fixed value module 049, the output end of the sixth switching module 070 and the double equipment interlocking input 008 are respectively connected to the N end, the Y end and the trigger end of the fifth switching module 069; the equipment interlocking input signal 048 and the output end of the fifth switching module 069 are connected to the fifth comparison module 068, and the output end of the fifth comparison module 068 and the No. 2 equipment interlocking input 006 are sequentially connected to the ninth AND module 067, the ninth pulse module 075 and the No. 2 equipment interlocking start indicator Order 077; the fifth fixed value module 053, the sixth fixed value module 054 and the No. 2 pump as the main pump 025 are respectively connected to the N end, Y end and trigger end of the eighth switching module 074; the fourth fixed value module 052, the output end of the eighth switching module 074 and the double equipment interlocking input 008 are respectively connected to the N end, Y end and trigger end of the seventh switching module 073; the equipment interlocking input signal 048 and the output end of the seventh switching module 073 are both connected to the sixth comparison module 072, and the output end of the sixth comparison module 072 and the No. 2 equipment interlocking input 006 are sequentially connected to the tenth AND module 071, the tenth pulse module 076 and the No. 2 equipment joint stop instruction 078.

[0037] Example 2 The control method for periodic rotation of standby equipment of a thermal power unit provided by the present invention comprises: Figures 1 to 5 The control modes are: 1) When the first interlocking throw-in / out 001 is 1, after the first SR module 003 determines, the interlocking throw-in 005 of the No. 1 device is triggered to be 1; when the second interlocking throw-in / out 002 is 1, after the second SR module 004 determines, the interlocking throw-in 006 of the No. 2 device is triggered to be 1; 2) When the interlocking input 005 of equipment No. 1 and the interlocking input 006 of equipment No. 2 are both 1, after the judgment by the first and module 007, the interlocking input 008 of both equipments is triggered to be 1; 3) When the interlocking input of equipment No. 1 005 and the interlocking input of both equipments 008 are both 1, after the second AND module 010 judges, the trigger sets pump No. 1 as the main pump 011 to 1; 4) When the interlocking input of equipment No. 2 006 and the interlocking input of both equipments 008 are both 1, after the judgment by the third and module 013, the triggering sets pump No. 2 as the main pump 014 to 1.

[0038] Figure 6 The control modes are: When both equipment interlocks are put into operation 008 as 1, pump No. 1 is set as the main pump 011, pump No. 1 is requested to be the main pump for the rotation time 015, pump No. 2 is requested to be the main pump for the rotation time 016, and pump No. 2 is set as the main pump 014. After judgment by the third SR module 021, pump No. 1 is triggered to be the main pump 024 as 1 or pump No. 2 is triggered to be the main pump 025 as 1 according to the status of pumps No. 1 and 2.

[0039] Figure 7 and Figure 8 The control modes are: 1) When the shutdown state 027 of pump No. 1 is 1, the operating state 028 of pump No. 2 is 1, and the condition that pump No. 2 is the main pump 025 is 1, all of which are satisfied, the preset rotation duration 026 is 1 and the triggering rotation duration requesting pump No. 1 to be the main pump 046 is 1; when the preset starting frequency 031 within a single cycle is compared with the first accumulation module 034 and satisfied, the triggering rotation duration requesting pump No. 1 to be the main pump 046 is 1.

[0040] 2) When the shutdown status 029 of pump No. 2 is 1, the operating status 030 of pump No. 1 is 1, and pump No. 1 is the main pump 024 is 1, the preset rotation duration 026 is 1 and the triggering rotation duration requesting pump No. 2 to be the main pump 047 is 1; when the preset starting frequency 031 within a single cycle is compared with the second accumulation module 041 and is satisfied, the triggering rotation duration requesting pump No. 2 to be the main pump 047 is 1.

[0041] Fig. 9 and Fig.10 The control modes are: 1) When the interlocking input signal 005 of equipment No. 1 is 1, according to the status of pump No. 1 as the main pump 024 and the dual equipment interlocking input signal 008, the value determined by the second switching module 058 and the first switching module 057 is compared with the equipment interlocking input signal 048, and finally the interlocking instruction 065 of equipment No. 1 is triggered to be 1.

[0042] 2) When the interlocking input signal 005 of equipment No. 1 is 1, according to the status of pump No. 1 as the main pump 024 and the dual equipment interlocking input signal 008, the value determined by the fourth switching module 063 and the third switching module 062 is compared with the equipment interlocking input signal 048, and finally the interlocking stop command 066 of equipment No. 1 is triggered to be 1.

[0043] 3) When the interlocking input signal 006 of equipment No. 2 is 1, according to the status that pump No. 2 is the main pump 025 and the interlocking signal of both equipments is 008, the value judged by the sixth switching module 070 and the fifth switching module 069 is compared with the equipment interlocking input signal 048, and finally the interlocking instruction 077 of equipment No. 2 is triggered to be 1.

[0044] 4) When the interlocking input signal 006 of equipment No. 2 is 1, according to the status that pump No. 2 is the main pump 025 and the interlocking signal of both equipments is 008, the value determined by the eighth switching module 074 and the seventh switching module 073 is compared with the equipment interlocking input signal 048, and finally the interlocking stop command 078 of equipment No. 2 is triggered to be 1.

[0045] In this embodiment, Figures 1 to 12 Main functions: 1. When only a single device is put into interlocking operation, the equipment put into interlocking operation will automatically start and stop according to the process flow, and the equipment not put into interlocking operation will remain in its original state; 2. After the two devices are put into interlocking, the main device is further distinguished according to whether the running time exceeds the preset regular rotation time. If the running time of the main device exceeds the preset regular rotation time, the main and auxiliary devices are forced to switch; if the running time of the main device does not exceed the preset regular rotation time, the main and auxiliary devices are switched according to whether the start and stop frequency of the main device exceeds the preset start and stop times; 3. After the dual equipment is put into interlocking, the main equipment automatically starts according to the process flow. If the standby equipment interlocking conditions are triggered, the standby equipment will automatically start. The shutdown process will first shut down the standby equipment and then the main equipment according to the process flow, and the start and stop times will be calculated separately.

[0046] Example 3 like Fig.13As shown, through the implementation and application of the technology of the present invention, it is concluded that when pump No. 1 is interlocked and put into operation or pump No. 2 is interlocked and put into operation, the process parameter R of the production operation unit changes. Pump No. 1 or No. 2 is forced to switch the main and auxiliary equipment according to whether the main equipment operation time exceeds the preset regular rotation time; if the main equipment operation time does not exceed the preset regular rotation time, the main and auxiliary equipment are switched according to whether the start and stop frequency of the main equipment exceeds the preset start and stop times; after the main equipment is automatically started according to the process flow, if the standby equipment joint start condition continues to be triggered, the standby equipment is automatically started. The shutdown process stops the standby equipment first and then the main equipment according to the process flow, and the start and stop times are calculated respectively.

[0047] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0048] In addition, it should be understood that although this specification is described in accordance with the implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art. The above content is only to illustrate the technical idea of ​​the present invention, and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution according to the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A control system for regular rotation of standby equipment of thermal power units, characterized in that: It includes a first SR module (003), a second SR module (004), a first AND module (007), a first pulse module (009), a second AND module (010), a second pulse module (012) and a third AND module (013); The first interlocking throw-in / out (001) is connected in sequence to the first SR module (003) and the interlocking throw-in of device No. 1 (005); the second interlocking throw-in / out (002) is connected in sequence to the second SR module (004) and the interlocking throw-in of device No. 2 (006); both the interlocking throw-in of device No. 1 (005) and the interlocking throw-in of device No. 2 (006) are connected to the first AND module (007), and the output end of the first AND module (007) is connected to the interlocking throw-in of both devices (008); the interlocking throw-in of device No. 1 (005) is connected to the first pulse module ( 009), the output end of the first pulse module (009) and the dual device interlocking input (008) are connected to the second AND module (010), and the output end of the second AND module (010) is connected to the No. 1 pump as the main pump (011); the No. 2 device interlocking input (006) is connected to the second pulse module (012), the output end of the second pulse module (012) and the dual device interlocking input (008) are connected to the third AND module (013), and the output end of the third AND module (013) is connected to the No. 2 pump as the main pump (014).

2. The control system for periodic rotation of backup equipment of thermal power units according to claim 1 is characterized in that: It also includes a third pulse module (017), a fourth pulse module (018), a first OR module (019), a second OR module (020), a third SR module (021), a fourth AND module (022) and a fifth AND module (023); The rotation duration requests that pump No. 1 be the main pump (015) be connected to the third pulse module (017), and the output end of the third pulse module (017) and the setting of pump No. 1 as the main pump (011) are both connected to the first OR module (019); the rotation duration requests that pump No. 2 be the main pump (016) be connected to the fourth pulse module (018), and the output end of the fourth pulse module (018) and the setting of pump No. 2 as the main pump (014) are both connected to the second OR module (020); the output end of the first OR module (019) and the output end of the second OR module (020) are both connected to the third SR module (021); the output end of the third SR module (021) and the dual equipment interlock are both put into use (008) are respectively connected to the fourth AND module (022) and the fifth AND module (023); the output end of the fourth AND module (022) is connected to pump No. 1 as the main pump (024), and the output end of the fifth AND module (023) is connected to pump No. 2 as the main pump (025).

3. The control system for periodic rotation of backup equipment of thermal power generation units according to claim 2, characterized in that: It also includes a sixth AND module (032), a first delay module (033), a first accumulation module (034), a fifth pulse module (035), a first comparison module (036), a third OR module (037) and a first delay module (038); The shutdown state (027) of pump No. 1, the running state (028) of pump No. 2 and the fact that pump No. 2 is the main pump (025) are all connected to the sixth AND module (032); the preset rotation duration (026) and the output end of the sixth AND module (032) are connected in sequence to the first delay module (033) and the fifth pulse module (035); the output end of the first delay module (038) and the output end of the sixth AND module (032) are both connected to the first accumulation module (034), and the output end of the first accumulation module (034) and the preset start frequency (031) within a single cycle are both connected in sequence to the first comparison module (036) and the first delay module (038); the output end of the fifth pulse module (035) and the output end of the first delay module (038) are both connected to the third OR module (037), and the output end of the third OR module (037) is connected to the rotation duration request that pump No. 1 be the main pump (046).

4. The control system for periodic rotation of backup equipment of thermal power generation units according to claim 3 is characterized in that: The system further comprises a seventh AND module (039), a second delay module (040), a second accumulation module (041), a sixth pulse module (042), a second comparison module (043), a fourth OR module (044) and a second delay interrupt module (045); the No. 2 pump shutdown state (029), the No. 1 pump operation state (030) and the No. 1 pump being the main pump (024) are all connected to the seventh AND module (039); the output end of the seventh AND module (039) and the preset rotation time (026) are connected to the second delay module (040) and the sixth pulse module (042) in sequence. The output end of the second delay interrupt module (045) and the output end of the seventh AND module (039) are both connected to the second accumulation module (041), and the output end of the second accumulation module (041) and the preset single-cycle start frequency (031) are both connected to the second comparison module (043) and the second delay interrupt module (045) in sequence; the output end of the sixth pulse module (042) and the output end of the second delay interrupt module (045) are both connected to the fourth OR module (044), and the output end of the fourth OR module (044) is connected to the rotation duration request No. 2 pump as the main pump (047).

5. The control system for periodic rotation of backup equipment of thermal power generation units according to claim 1, characterized in that: It also includes a first fixed value module (049), a second fixed value module (050), a third fixed value module (051), a seventh AND module (055), a third comparison module (056), a first switching module (057), a second switching module (058), a seventh pulse module (059), a fourth fixed value module (052), a fifth fixed value module (053), a sixth fixed value module (054), an eighth AND module (060), a fourth comparison module (061), a third switching module (062), a fourth switching module (063) and an eighth pulse module (064); The second fixed value module (050), the third fixed value module (051) and the No. 1 pump as the main pump (024) are respectively connected to the N terminal, the Y terminal and the trigger terminal of the second switching module (058); the first fixed value module (049), the output terminal of the second switching module (058) and the double equipment interlocking input (008) are respectively connected to the N terminal, the Y terminal and the trigger terminal of the first switching module (057); the equipment interlocking input signal (048) and the output terminal of the first switching module (057) are both connected to the third comparison module (056), and the output terminal of the third comparison module (056) and the No. 1 equipment interlocking input (005) are sequentially connected to the seventh AND module (055), the seventh pulse module (059) and the No. 1 equipment interlocking instruction (065); The fifth fixed value module (053), the sixth fixed value module (054) and the No. 1 pump as the main pump (024) are respectively connected to the N terminal, the Y terminal and the trigger terminal of the fourth switching module (063); the output terminal of the fourth fixed value module (052), the fourth switching module (063) and the double equipment interlocking input (008) are respectively connected to the N terminal, the Y terminal and the trigger terminal of the third switching module (062); the equipment interlocking input signal (048) and the output terminal of the third switching module (062) are both connected to the fourth comparison module (061), and the output terminal of the fourth comparison module (061) and the No. 1 equipment interlocking input (005) are sequentially connected to the eighth AND module (060), the eighth pulse module (064) and the No. 1 equipment joint stop instruction (066).

6. The control system for periodic rotation of backup equipment of thermal power generation units according to claim 1, characterized in that: It also includes a first fixed value module (049), a second fixed value module (050), a third fixed value module (051), a first switching module (057), a second switching module (058), a ninth AND module (067), a fifth comparison module (068), a fifth switching module (069), a sixth switching module (070), a ninth pulse module (075), a fourth fixed value module (052), a fifth fixed value module (053), a sixth fixed value module (054), a tenth AND module (071), a sixth comparison module (072), a seventh switching module (073), an eighth switching module (074) and a tenth pulse module (076); The second fixed value module (050), the third fixed value module (051), and the No. 2 pump as the main pump (025) are respectively connected to the N terminal, the Y terminal, and the trigger terminal of the sixth switching module (070); the first fixed value module (049), the output terminal of the sixth switching module (070), and the dual equipment interlocking input (008) are respectively connected to the N terminal, the Y terminal, and the trigger terminal of the fifth switching module (069); the equipment interlocking input signal (048) and the output terminal of the fifth switching module (069) are both connected to the fifth comparison module (068), and the output terminal of the fifth comparison module (068) and the No. 2 equipment interlocking input (006) are sequentially connected to the ninth AND module (067), the ninth pulse module (075), and the No. 2 equipment joint start instruction (077); The fifth fixed value module (053), the sixth fixed value module (054) and the No. 2 pump as the main pump (025) are respectively connected to the N terminal, the Y terminal and the trigger terminal of the eighth switching module (074); the output terminal of the fourth fixed value module (052), the eighth switching module (074) and the double equipment interlocking input (008) are respectively connected to the N terminal, the Y terminal and the trigger terminal of the seventh switching module (073); the equipment interlocking input signal (048) and the output terminal of the seventh switching module (073) are both connected to the sixth comparison module (072), and the output terminal of the sixth comparison module (072) and the No. 2 equipment interlocking input (006) are sequentially connected to the tenth AND module (071), the tenth pulse module (076) and the No. 2 equipment joint stop instruction (078).

7. A control method for periodic rotation of standby equipment of a thermal power unit, characterized in that: The method is based on the control system for periodic rotation of standby equipment of thermal power units as claimed in claim 6, comprising: When the first interlocking start / stop (001) is 1, after the first SR module (003) determines, the interlocking start (005) of equipment No. 1 is triggered to be 1; when the second interlocking start / stop (002) is 1, after the second SR module (004) determines, the interlocking start (006) of equipment No. 2 is triggered to be 1; When the interlocking input of equipment No. 1 (005) and the interlocking input of equipment No. 2 (006) are both 1, after the judgment of the first and module (007), the interlocking input of both equipments (008) is triggered to be 1; When the interlocking input of equipment No. 1 (005) and the interlocking input of both equipments (008) are both 1, after the second AND module (010) judges, the triggering setting of pump No. 1 as the main pump (011) is 1; When the interlocking of equipment No. 2 (006) and the interlocking of both equipments (008) are both 1, after the third AND module (013) determines, the trigger sets pump No. 2 as the main pump (014) to 1.

8. The control method for periodic rotation of backup equipment of thermal power generation units according to claim 7, characterized in that: Also includes: When both equipment interlocks are put into operation (008) and are 1, pump No. 1 is set as the main pump (011), the rotation duration requests pump No. 1 to be the main pump (015), the rotation duration requests pump No. 2 to be the main pump (016), and pump No. 2 is set as the main pump (014). After judgment by the third SR module (021), pump No. 1 is triggered to be the main pump (024) as 1 or pump No. 2 is triggered to be the main pump (025) as 1 according to the status of pumps No. 1 and No.

2.

9. The control method for periodic rotation of backup equipment of thermal power generation units according to claim 8, characterized in that: Also includes: When the shutdown state (027) of pump No. 1 is 1, the running state (028) of pump No. 2 is 1, and the state (025) of pump No. 2 as the main pump is 1, the preset rotation duration (026) is 1 and the triggering rotation duration requesting pump No. 1 to be the main pump (046) is 1; when the preset starting frequency (031) within a single cycle is compared with the first accumulation module (034) and is satisfied, the triggering rotation duration requesting pump No. 1 to be the main pump (046) is 1; When the shutdown state (029) of pump No. 2 is 1, the running state (030) of pump No. 1 is 1, and pump No. 1 is the main pump (024) is 1, the preset rotation duration (026) is 1 and the triggering rotation duration requesting pump No. 2 to be the main pump (047) is 1; when the preset starting frequency (031) within a single cycle is compared with the second accumulation module (041) and is satisfied, the triggering rotation duration requesting pump No. 2 to be the main pump (047) is 1.

10. The control method for periodic rotation of backup equipment of thermal power generation units according to claim 9, characterized in that: Also includes: When the interlocking input (005) of equipment No. 1 is 1, according to the status of pump No. 1 as the main pump (024) and the state of both equipment interlocking input (008), the value determined by the second switching module (058) and the first switching module (057) is compared with the equipment interlocking input signal (048), and finally the interlocking instruction (065) of equipment No. 1 is triggered to be 1; When the interlocking input (005) of equipment No. 1 is 1, according to the state that pump No. 1 is the main pump (024) and the interlocking of both equipments is input (008), the value determined by the fourth switching module (063) and the third switching module (062) is compared with the equipment interlocking input signal (048), and finally the interlocking stop instruction (066) of equipment No. 1 is triggered to be 1; When the interlocking input signal (006) of equipment No. 2 is 1, according to the status of pump No. 2 being the main pump (025) and both equipment interlocking being input (008), the value determined by the sixth switching module (070) and the fifth switching module (069) is compared with the equipment interlocking input signal (048), and finally the interlocking instruction (077) of equipment No. 2 is triggered to be 1; When the interlocking input signal (006) of equipment No. 2 is 1, according to the status of pump No. 2 being the main pump (025) and the interlocking of both equipments being put into operation (008), the values ​​judged by the eighth switching module (074) and the seventh switching module (073) are compared with the equipment interlocking input signal (048), and finally the interlocking stop command (078) of equipment No. 2 is triggered to be 1.

Images