CN113076711B - Relay protection platform hardware design method and system based on component reliability - Google Patents
Relay protection platform hardware design method and system based on component reliability Download PDFInfo
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Abstract
The application discloses a relay protection platform hardware design method and system based on component reliability. Wherein the method comprises the following steps: determining the reliability of the relay protection device as pi R, and according to the reliability of the relay protection device; determining the failure rate of a statistical analysis system corresponding to the relay protection device as P 0 =1-rr; the components of the relay protection device are evaluated, and the fault loss cost of the relay protection device is determined; comparing the fault loss cost of the mature relay protection device with the fault loss cost of the newly developed relay protection device, and determining the cost of the optimized space when the newly developed relay protection device has the optimized space; performing redundancy design on the newly-developed relay protection device, and determining that the reliability of the newly-developed relay protection device after the redundancy design is pi R I The method comprises the steps of carrying out a first treatment on the surface of the The reliability of the newly-developed relay protection device after redundancy design is pi R I Reliability pi R with mature relay protection device H And comparing, and determining that the technology for newly developing the relay protection device is feasible.
Description
Technical Field
The application relates to the technical field of power systems, in particular to a relay protection platform hardware design method and system based on component reliability.
Background
Relay protection is an important component for guaranteeing safe operation of a power grid, and industrial-grade chips such as an analog-digital conversion chip (ADC), a main control chip (MCU, CPU and the like), a programmable logic device chip (FPGA), a communication interface chip, a storage chip, an isolation chip and the like are core devices of secondary equipment. The chip has a large application quantity and a wide range in secondary equipment such as a transformer substation relay protection device, automation equipment, communication equipment and the like, and covers the whole power grid. Once the power supply is disconnected, the related on-line relay protection device is free from accessory support, and the new protection equipment must be all made of domestic devices.
Because the safe operation of the power grid is highly dependent on reliable secondary equipment, the domestic protection equipment is still in a development and test stage and is not mature, the risk of breakdown and power failure of a large-scale power grid of a power system is increased sharply, the interconnected large power grid can be separated and run in a depressurization mode, the regulation and control capability of the power grid is reduced sharply, and the physical foundation of a three-defense line of the power grid safety and stability is faced with a great challenge.
Aiming at the technical problems that the prior art has high dependence on reliable secondary equipment in the safe operation of a power grid, the domestic protection equipment is still in the development and test stage, the risk of breakdown and power failure of a large-scale power grid of a power system is increased sharply, the interconnected large power grid can be separated and run in a depressurization mode, the regulation and control capability of the power grid is reduced sharply, and the physical foundation of three defense lines of the safe and stable power grid faces significant challenges, no effective solution is proposed at present.
Disclosure of Invention
The embodiment of the disclosure provides a relay protection platform hardware design method and system based on component reliability, which at least solve the technical problems that in the prior art, because the safe operation of a power grid is highly dependent and reliable, the domestic protection equipment is still in a development and test stage and is not mature, the large-scale power grid collapse and power failure risk of a power system are increased rapidly, the interconnected large power grid can be separated and run at reduced voltage, the regulation and control capability of the power grid is reduced rapidly, and the physical basis of three defense lines of the safety and stability of the power grid is subject to significant challenges.
According to an aspect of the embodiments of the present disclosure, there is provided a relay protection platform hardware design method based on component reliability, including: determining a relayThe reliability of the protection device is pi R, and the reliability of the relay protection device is pi R; determining the failure rate of a statistical analysis system corresponding to the relay protection device as P 0 =1-rr; the method comprises the steps of evaluating components of the relay protection device, and determining the fault loss cost of the relay protection device, wherein the fault loss cost of the relay protection device comprises the fault loss cost of a mature relay protection device and the fault loss cost of a newly developed relay protection device; comparing the fault loss cost of the mature relay protection device with the fault loss cost of the newly developed relay protection device, judging whether the newly developed relay protection device has an optimization space, and when the newly developed relay protection device has the optimization space, determining that the fault rate of the statistical analysis system is P 0 Determining an optimized space cost; performing redundancy design on the newly-developed relay protection device, determining the reliability of the components after the redundancy design as RI, and determining the reliability of the newly-developed relay protection device after the redundancy design as pi R I The method comprises the steps of carrying out a first treatment on the surface of the The reliability of the newly-developed relay protection device after the redundancy design is pi R I Reliability pi R with the mature relay protection device H Comparing, if the reliability of the newly developed relay protection device is pi R I The reliability pi R of the mature relay protection device is not less than H And determining that the technology for newly developing the relay protection device is feasible.
According to another aspect of the embodiments of the present disclosure, there is also provided a relay protection platform hardware design system based on component reliability, including: the fault rate determining module is used for determining the reliability of the relay protection device as pi R and according to the reliability pi R of the relay protection device; determining the failure rate of a statistical analysis system corresponding to the relay protection device as P 0 =1-rr; the failure loss cost determining module is used for evaluating components of the relay protection device and determining failure loss cost of the relay protection device, wherein the failure loss cost of the relay protection device comprises failure loss cost of a mature relay protection device and failure loss cost of a newly developed relay protection device; determining an optimized space cost module for relaying the maturityComparing the fault loss cost of the protection device with the fault loss cost of the newly-developed relay protection device, judging whether the newly-developed relay protection device has an optimization space, and when the newly-developed relay protection device has the optimization space, determining that the fault rate of the statistical analysis system is P 0 Determining an optimized space cost; the redundancy reliability determining module is used for performing redundancy design on the newly-developed relay protection device, determining the reliability of the components after the redundancy design as RI, and determining the reliability of the newly-developed relay protection device after the redundancy design as pi R I The method comprises the steps of carrying out a first treatment on the surface of the A determination technology feasible module for setting the reliability of the newly-developed relay protection device after the redundancy design to be pi R I Reliability pi R with the mature relay protection device H Comparing, if the reliability of the newly developed relay protection device is pi R I The reliability pi R of the mature relay protection device is not less than H And determining that the technology for newly developing the relay protection device is feasible.
Aiming at the problem of improving the failure rate caused by immature protective elements, the invention further determines the reliability of the components with different maturity by combining the maturity division of various components of the protective device to reduce the potential loss caused by the failure rate of the protective device, and proposes the corresponding relation between the reliability of the components and the failure rate of the device; because the redundancy of the components can improve the reliability of the device, by defining the optimization conditions that the cost increase caused by the reliability improvement space of the components in the device when hot standby or cold standby is used and the failure rate of the new device is equivalent to the loss difference under the failure rate condition of the transportation device when the new device is not improved, the hardware design method of the high-reliability relay protection platform under the condition of optimal cost is provided, the cost optimization of the novel relay protection device in the reliability and power failure loss of the device is ensured, and the method has stronger popularization and application conditions.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and do not constitute an undue limitation on the disclosure. In the drawings:
fig. 1 is a flow diagram of a relay protection platform hardware design method based on component reliability according to an embodiment of the disclosure;
FIG. 2 is a flowchart of a method for designing relay protection platform hardware based on component reliability according to an embodiment of the present disclosure;
FIG. 3 is a block diagram of a primary chip of a relay protection device according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a relay protection platform hardware design system based on component reliability according to an embodiment of the disclosure.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
According to a first aspect of the present embodiment, a relay protection platform hardware design method 100 based on component reliability is provided. Referring to fig. 1, the method 100 includes:
s102, determining the reliability of the relay protection device as pi R, and according to the reliability pi R of the relay protection device; determining the failure rate of a statistical analysis system corresponding to the relay protection device as P 0 ＝1－∏R；
S104, evaluating components of the relay protection device, and determining the fault loss cost of the relay protection device, wherein the fault loss cost of the relay protection device comprises the fault loss cost of a mature relay protection device and the fault loss cost of a newly developed relay protection device;
s106, comparing the fault loss cost of the mature relay protection device with the fault loss cost of the newly developed relay protection device, judging whether the newly developed relay protection device has an optimization space, and when the newly developed relay protection device has the optimization space, determining that the fault rate of the statistical analysis system is P 0 Determining an optimized space cost;
s108, performing redundancy design on the newly-developed relay protection device, determining that the reliability of the components after the redundancy design is RI, and determining that the reliability of the newly-developed relay protection device after the redundancy design is PiR I ；
S110, the reliability of the newly-developed relay protection device after the redundancy design is pi R I Reliability pi R with the mature relay protection device H Comparing, if the reliability of the newly developed relay protection device is pi R I The reliability pi R of the mature relay protection device is not less than H And determining that the technology for newly developing the relay protection device is feasible.
Specifically, referring to fig. 2, the specific steps are as follows:
(1) The components forming the new relay protection are classified according to reliability and classified into an immature component with low reliability, a mature component with medium reliability and a mature component with high reliability.
(2) The components with different levels of reliability are subjected to reliability weight assignment, and the high reliability is R H The method comprises the steps of carrying out a first treatment on the surface of the The reliability of (1) is R M The method comprises the steps of carrying out a first treatment on the surface of the Low reliability of R L The method comprises the steps of carrying out a first treatment on the surface of the And define reliability values according to components, respectively. Wherein components of the operation protection device are all high-reliability R H 。
(3) The reliability of the device is pi R, and the failure rate of the device corresponds to the failure rate P in the statistical analysis system 0 ＝1－∏R。
(4) And evaluating the fault cost and loss of the new device and the on-line device by taking the components as evaluation objects.
(5) If CL 1 ＝N·P 1 ·T·Pm>CL 0 ＝N·P 0 When t·pm, it is determined that there is an optimization space, the optimization space is Δc=n· (P 1 －P 0 ) T.Pm. If CL 1 ＝N·P 1 ·T·Pm≤CL 0 ＝N·P 0 T·pm, it is determined that there is no optimization space.
(6) If the optimization space exists, the device is divided into a hot standby device or a cold standby device according to the role of the components in protection, and if the device does not need to participate in the real-time operation of the system and the storage and processing of programs and data, the device can be rapidly put into operation and the functional performance of the device is not influenced, the cold standby device can be considered; and vice versa for a hot standby device.
(7) The reliability of the protection device can be improved after the redundancy design, and the reliability of components after the redundancy design is RI=1-pi (1-K.R) Lv ) Wherein Lv can be H\M\L, which represents components with different maturity, K is a standby coefficient; the reliability of the newly designed protection device is pi R I If the value is more than or equal to the reliability pi R of the on-line device H The solution is technically feasible.
(8) The cost of the new device is equal to or more than deltaC/N (CM) i －CM 0 ) And in the process, the scheme is economical and feasible, namely the device is formed by the optimal components after the overall reliability and the cost of the device are improved.
(9) If the cost of the new device is delta C/N<(CM i －CM 0 ) When the scheme is used, the economic benefit is poor, namely, the device meets the application requirement of the power grid, but the profit of manufacturers can be reduced.
Wherein the fault loss cost of the new device is CL i ＝N·P i T.Pm, N is the number of devices; pm is the mean lost power from the fault; t is the average power failure time of the fault; CL is the fault loss cost; p is the failure rate; i is different device schemes, i is 0 and is a mature relay protection device, and i is 1 and is a newly developed relay protection device.
K is a reserve factor, which is divided into a hot reserve factor, which may be taken as 0.965, and a cold reserve factor, which may be taken as 1.
The cost of a single new device after redundant design is CM i ＝N Hj ·C Hj +N Mj ·C Mj +N Lj ·C Lj 。N Hj 、N Mj 、N Lj The number of the three components is C Hj 、C Mj 、C Lj The cost of the three types of components is respectively, and j is the j-th component of the type of components. i is different device schemes, i is 0 and is a mature relay protection device, and i is 1 and is a newly developed relay protection device.
Delta C is the difference between the loss of the power grid caused by the expected failure of the new device of the protection device of the model and the loss of the power grid caused by the failure of the device of the model, and N is the number of the devices of the model in the power grid.
The high voltage relay protection device is shown with reference to fig. 3. The chips constituting the high-voltage relay protection device can be classified into 6 types. Wherein. The domestic chips can be divided into three types according to the maturity, wherein the ADC and the communication chip are newly developed chips which are not verified by batch application, the maturity is low, the chips belong to the immature chip type, the reliability is low, the chips are 0.9851, and the failure rate is highest; CPU (MCU), FPGA is the chip that has been researched and developed and applied and verified in batches, but not applied in the power system, the maturity is general, belong to the partial mature chip class, its reliability is generally 0.9936, the fault rate is moderate; the chips such as storage and isolation are developed and verified by batch application, the maturity is high, the chips belong to the class of mature chips, the reliability is high, the chips are 0.9983 the same as imported chips, and the failure rate is lowest. The components are in series connection in the protection equipment, and the reliability of the device is the product of the reliability of each component. (reliability of series structure system is R= RLv. RLv; reliability of parallel structure system is R=1- (1-R) Lv )·(1－R Lv ))
The chips can be divided into hot standby and cold standby according to the functions of the chips in the device, the reliability of the chips is slightly different, and the service life or reliability of the hot standby is generally lower than that of the cold standby. In a 4U device, the power of the whole machine is increased by 1W due to hot standby, the temperature rise is increased by 2 degrees, and the service life is shortened by about half due to the temperature rise by 10 degrees. Thus, if coldThe reliability of the spare component is that the reliability of the parallel structure system is R=1- (1-R) Lv )·(1－R Lv ) The method comprises the steps of carrying out a first treatment on the surface of the If the device is hot standby, reliability reduction caused by temperature rise is considered, and the reliability reduction coefficient K is multiplied by 0.965, wherein R=1- (1-R) Lv ·K)·(1－R Lv ·K)。
The reliability of the domestic chip of the device can be defined by combining the maturity of the chip and the application of cold and hot standby, for example, the communication chip can be used for cold standby due to the existence of a capacitor of a device board card, and the reliability is increased under the condition that the power consumption is not increased by doubling or multiplexing, for example, a single 0.9851 and is doubled to 1- (1-0.9851) x (1-0.9851) = 0.999778; for example, a CPU chip, which is duplicated or multiplexed due to participation in data processing and protection functions of the system, requires hot standby, and increases reliability due to improvement of power consumption, but is required to consider reliability degradation due to temperature rise, for example, consider overall degradation of 0.965, such as single 0.9936, and is duplicated to 1- (1-0.9936 ×0.965) × (1-0.9936 ×0.965) = 0.998304537.
Calculated according to the cost of the normal device, if there is no hardware redundancy, CM=N.C, if i=0, the cost CM of the single device 0 1500 yuan. The reliability of the components in the device is shown in table 1, and the reliability R0 of the device is 0.989744, which corresponds to 1.0256% failure rate. The reliability of the components of the nationally produced device, which was not designed with reliability in mind, is shown in Table 2, and the reliability R of the device 1 0.954785788, which corresponds to 4.52 percent of failure rate, is higher than that of the on-line device, and is difficult to popularize and apply.
According to the market stock of 110kV protection devices of a certain manufacturer of 50000, the failure rate is calculated to be 1-0.9983 by the reliability of components such as chips 6 1.0256% and the failure rate P of the on-line device obtained by statistics 0 When the number of annual faults is equal to 1.022%, the number of annual faults is 500, the equipment where the protection device is located is considered to have 20MW (average value is taken because of 10000-31500 kVA of economic conveying capacity of 110 kV), the power failure T is 4 hours, the loss Pm is 80 MW.h each time, the electricity consumption unit price of large customers is 8 ten thousand DEG, and the electricity price PR is 0.3 yuan/DEG, and the manufacturer is caused by the device each yearThe barrier brings losses to the grid of 1230.72 kiloyuan.
If the newly developed device is not designed for reliability, the power failure loses the cost CL 1 ＝N·P 1 T.Pm.PR, N is the number of devices, pm is the average power loss in the outage, and T is the average outage time in the outage. CL is the power failure loss cost, P 1 For failure rate, PR is electricity price. According to the device reliability 0.9548 of Table 2, failure rate P 1 4.52%, the outage loss is 5424 ten thousand yuan, wherein the outage loss due to low reliability is 4193.28 ten thousand yuan.
In order to increase the reliability of the domestic device, the unit price of domestic components is the same as that of imported components. The cost of a single new device after redundant design is CM i ＝N Hj ·C Hj +N Mj ·C Mj +N Lj ·C Lj . If the cost of the three components is 500 yuan, the cost increase space of a single device brought by improving the reliability is (5424-1230.72) 10 4 50000= 838.656 yuan. As shown in Table 3, the cost per unit is increased by 700 yuan, which is less than the space 839.52 yuan for the cost increase of the unit, and the reliability reaches the reliability level of the in-service device in Table 1, which is the optimal scheme. As shown in Table 4, the cost per unit is increased by 1000 yuan, the economy is poor, the reliability of the device is higher than the reliability 0.9897 of the in-process device by 0.9943, and the method is not an optimal scheme.
TABLE 1 scheme 0 on-line device reliability analysis
Table 2 scheme 1 reliability analysis of domestic component devices without reliability design
Table 3 scheme 2 reliability analysis of domestic component devices with reliability design considered under cost constraints
Table 4 scheme 3 reliability analysis of domestic component device designed with reliability considerations beyond cost constraints
In table 3, three chips of ADC, communication and FPGA are designed for standby, and the reliability of the device is improved to the reliability level of the in-process device, and then the device meets the reliability requirement.
The method comprises the following specific steps:
(1) The domestic components constituting relay protection are classified according to reliability, and are classified into a mature component with high reliability and a mature component with high reliability among immature components with low reliability and mature components with medium reliability. Two components are shown in table 1 for each class.
(2) Performing reliability weight assignment on components with different levels of reliability, wherein the high reliability is RH; the reliability of the method is RM; low reliability is RL; and the reliability values are defined as 0.9983, 0.9851 and 0.9936 respectively according to the components, wherein the components of the operation protection device are high-reliability RH, the device reliability is pi RH, and the device failure rate corresponds to the failure rate P0=1-pi RH in the statistical analysis system.
(3) And evaluating the fault cost and loss of the new device and the on-line device by taking the components as evaluation objects. Cli=n·pi·t·pm, N is the number of devices, pm is the failure average lost power, and T is the failure average outage time. CL is fault loss cost, P is fault rate, i is 0 and is mature relay protection device, and i is 1 and is newly developed relay protection device.
(4) If cl1=n·p1·t·pm > cl0=n·p0·t·pm, it is determined that there is an optimization space, and the optimization space is Δc=n· (p1—p0) ·t·pm.
(5) If the optimization space exists, the device is divided into a hot standby device or a cold standby device according to the role of the components in protection, and if the device does not need to participate in the real-time operation of the system and the storage and processing of programs and data, the device can be rapidly put into operation and the functional performance of the device is not influenced, the cold standby device can be considered; and vice versa for a hot standby device. The reserve factor K is divided into a hot reserve factor, which may be taken as 0.965, and a cold reserve factor, which may be taken as 1.
(6) The reliability of the protection device can be improved after the redundancy design, the reliability of components after the redundancy design is RI=1-pi (1-K RLv), wherein Lv can be H\M\L, components with different maturity are represented, and K is a standby coefficient; the reliability of the newly designed protection device is pi RI, and if the value is more than or equal to the reliability pi RH of the transportation device, the scheme technology is feasible.
(7) The cost of a single new device after redundancy design is cmi= NHj ·chj+ NMj · CMj +nlj· CLj. NHj, NMj, NLj is the number of three types of components, CHj, CMj, CLj is the cost of the three types of components, and j is the j-th component. At this time, the reliability of the new device is improved due to the increase of redundant devices, and when the delta C is more than or equal to N (CMi-CM 0), the scheme is economically feasible, namely the device is formed by the optimal components after the overall reliability and cost improvement. The delta C is the difference between the loss of the power grid caused by failure of the model protection device when the model protection device fails according to the reliability design and the loss of the power grid caused by failure of the model on-line device, and the N is the number of the model on the power grid.
Therefore, according to the relay protection platform hardware design method based on the element reliability, aiming at the problem of fault rate improvement caused by immature protective element, in order to reduce potential loss caused by fault rate of the protective device, the element reliability of different maturity is further determined by combining maturity division of various elements of the protective device, and the corresponding relation between the element reliability and the device fault rate is provided; because the redundancy of the components can improve the reliability of the device, by defining the optimization conditions that the cost increase caused by the reliability improvement space of the components in the device when hot standby or cold standby is used and the failure rate of the new device is equivalent to the loss difference under the failure rate condition of the transportation device when the new device is not improved, the hardware design method of the high-reliability relay protection platform under the condition of optimal cost is provided, the cost optimization of the novel relay protection device in the reliability and power failure loss of the device is ensured, and the method has stronger popularization and application conditions.
Optionally, before determining the reliability of the relay protection device to be pi R, the method further includes: dividing the components forming the newly-developed relay protection device according to the reliability, and determining the components of the newly-developed relay protection device with different levels of reliability, wherein the components of the newly-developed relay protection device with different levels of reliability are immature components with low reliability, mature components with medium reliability and mature components with high reliability; performing reliability weight assignment on components of the newly-developed relay protection device with different levels of reliability, and determining that the high reliability is R H The method comprises the steps of carrying out a first treatment on the surface of the The reliability of (1) is R M The method comprises the steps of carrying out a first treatment on the surface of the Low reliability of R L The reliability of the components of the mature relay protection device is R H 。
Optionally, the components of the relay protection device are evaluated, the fault loss cost of the relay protection device is determined, the fault loss cost of the relay protection device includes the fault loss cost of the mature relay protection device and the fault loss cost of the newly developed relay protection device, and the method includes: determining the failure loss cost of the relay protection device according to the number of the relay protection device, the failure rate, the failure average loss power and the failure average power failure time:
CL i ＝N·P i ·T·Pm
wherein CL is i For the fault loss cost of the relay protection device, P i For failure rate, T is failure average power failure time, pm is failure average loss power, wherein i is taken as 0 and is a mature relay protection device, and the failure loss of the mature relay protection deviceLoss cost of CL 0 ＝N·P 0 T.Pm, i takes 1 as a newly developed relay protection device, and the fault loss cost of the newly developed relay protection device is CL 1 ＝N·P 1 ·T·Pm。
Optionally, comparing the fault loss cost of the mature relay protection device with the fault loss cost of the newly developed relay protection device, determining whether an optimization space exists in the newly developed relay protection device, and when the optimization space exists in the newly developed relay protection device, determining that the fault rate of the statistical analysis system is P 0 Determining an optimized space cost, comprising: fault loss cost CL of the mature relay protection device 0 ＝N·P 0 T.Pm and the fault loss cost CL of the newly developed relay protection device 1 ＝N·P 1 Comparing T.Pm; if CL 1 ＝N·P 1 ·T·Pm>CL 0 ＝N·P 0 T·pm, it is determined that there is an optimization space; determining the optimized space cost as Δc=n· (P 1 －P 0 )·T·Pm。
Optionally, the method further comprises: determining the economic benefit of the newly developed relay protection device when the technology of the newly developed relay protection device is feasible; the cost of a single newly developed relay protection device after the redundant design is determined is as follows:
CM i ＝N Hj ·C Hj +N Mj ·C Mj +N Lj ·C L ；
wherein N is Hj 、N Mj 、N Lj The number of the three types of components, namely an immature component with low reliability, a mature component with medium reliability and a mature component with high reliability, C Hj 、C Mj 、C Lj Costs of three types of components, namely an immature component with low reliability, a mature component with medium reliability and a mature component with high reliability, j is the j th of the three types of components, i is a different device scheme, i is taken as a mature relay protection device, i is taken as a 1, and the newly developed relay protection device;
when the delta C/N is more than or equal to (CM) i －CM 0 ) When the new grinding is performedThe economic benefit of the relay protection device is feasible; when delta C/N<(CM i －CM 0 ) And in the process, the economic benefit of the newly-developed relay protection device is poor, wherein delta C is the optimized space cost of the newly-developed relay protection device.
Therefore, according to the relay protection platform hardware design method based on the element reliability, aiming at the problem of fault rate improvement caused by immature protective element, in order to reduce potential loss caused by fault rate of the protective device, the element reliability of different maturity is further determined by combining maturity division of various elements of the protective device, and the corresponding relation between the element reliability and the device fault rate is provided; because the redundancy of the components can improve the reliability of the device, by defining the optimization conditions that the cost increase caused by the reliability improvement space of the components in the device when hot standby or cold standby is used and the failure rate of the new device is equivalent to the loss difference under the failure rate condition of the transportation device when the new device is not improved, the hardware design method of the high-reliability relay protection platform under the condition of optimal cost is provided, the cost optimization of the novel relay protection device in the reliability and power failure loss of the device is ensured, and the method has stronger popularization and application conditions.
According to another aspect of the present embodiment, there is further provided a relay protection platform hardware design system 400 based on component reliability. The system 400 includes: a failure rate determining module 410, configured to determine the reliability of the relay protection device as pi R, according to the reliability of the relay protection device pi R; determining the failure rate of a statistical analysis system corresponding to the relay protection device as P 0 =1-rr; the failure loss determination cost module 420 is configured to evaluate components of the relay protection device, determine failure loss cost of the relay protection device, where the failure loss cost of the relay protection device includes failure loss cost of a mature relay protection device and failure loss cost of a newly developed relay protection device; the optimization space cost determining module 430 is configured to compare the failure loss cost of the mature relay protection device with the failure loss cost of the newly developed relay protection device, determine whether an optimization space exists in the newly developed relay protection device, and determine that the newly developed relay protection device has an optimization space when the newly developed relay protection device has the optimization spaceThe optimization space exists in the relay protection device, and the failure rate according to the statistical analysis system is P 0 Determining an optimized space cost; the redundancy reliability determining module 440 is configured to perform redundancy design on the newly developed relay protection device, determine the reliability of the components after the redundancy design as RI, and determine the reliability of the newly developed relay protection device after the redundancy design as RI I The method comprises the steps of carrying out a first treatment on the surface of the A determination technology feasible module 450, configured to determine the reliability of the newly-developed relay protection device after the redundancy design as pi R I Reliability pi R with the mature relay protection device H Comparing, if the reliability of the newly developed relay protection device is pi R I The reliability pi R of the mature relay protection device is not less than H And determining that the technology for newly developing the relay protection device is feasible.
Optionally, determining the failure rate module 410 includes: the component dividing submodule is used for dividing components forming the newly-developed relay protection device according to the reliability and determining the components of the newly-developed relay protection device with different levels of reliability, wherein the components of the newly-developed relay protection device with different levels of reliability are low-reliability immature components, medium-reliability mature components and high-reliability mature components; the weight assignment sub-module is used for carrying out reliability weight assignment on the components of the newly-developed relay protection device with different levels of reliability, and determining that the high reliability is R H The method comprises the steps of carrying out a first treatment on the surface of the The reliability of (1) is R M The method comprises the steps of carrying out a first treatment on the surface of the Low reliability of R L The reliability of the components of the mature relay protection device is R H 。
Optionally, determining the fault loss cost module 420 includes: the fault loss cost determination submodule is used for determining the fault loss cost of the relay protection device according to the device number, the fault rate, the fault average loss power and the fault average power failure time of the relay protection device:
CL i ＝N·P i ·T·Pm
wherein CL is i For the fault loss cost of the relay protection device, P i For failure rate, T is failure average power failure time, pm is failure average lossLosing power, wherein i is taken as 0, and the fault loss cost of the mature relay protection device is CL 0 ＝N·P 0 T.Pm, i takes 1 as a newly developed relay protection device, and the fault loss cost of the newly developed relay protection device is CL 1 ＝N·P 1 ·T·Pm。
Optionally, determining the optimized space cost module 430 includes: a fault loss cost comparison sub-module for comparing fault loss cost CL of the mature relay protection device 0 ＝N·P 0 T.Pm and the fault loss cost CL of the newly developed relay protection device 1 ＝N·P 1 Comparing T.Pm; judging and optimizing a space sub-module for judging if CL 1 ＝N·P 1 ·T·Pm>CL 0 ＝N·P 0 T·pm, it is determined that there is an optimization space; a determine optimization space cost sub-module for determining the optimization space cost as Δc=n (P 1 －P 0 )·T·Pm。
Optionally, the system 400 further comprises: the economic benefit determining module is used for determining the economic benefit of the newly developed relay protection device when the technology of the newly developed relay protection device is feasible; the cost module for determining the redundancy single unit is used for determining the cost of a newly developed relay protection device after redundancy design as follows:
CM i ＝N Hj ·C Hj +N Mj ·C Mj +N Lj ·C L ；
wherein N is Hj 、N Mj 、N Lj The number of the three types of components, namely an immature component with low reliability, a mature component with medium reliability and a mature component with high reliability, C Hj 、C Mj 、C Lj Costs of three types of components, namely an immature component with low reliability, a mature component with medium reliability and a mature component with high reliability, j is the j th of the three types of components, i is a different device scheme, i is taken as a mature relay protection device, i is taken as a 1, and the newly developed relay protection device; determining an economic benefit feasible module for determining that when the delta C/N is more than or equal to (CM) i －CM 0 ) When determining theThe economic benefit of newly developing the relay protection device is feasible; determining a module with poor economic benefit for determining the ratio delta C/N<(CM i －CM 0 ) And determining that the economic benefit of the newly-developed relay protection device is poor, wherein delta C is the optimized space cost of the newly-developed relay protection device.
The relay protection platform hardware design system 400 based on the reliability of the component according to the embodiment of the present invention corresponds to the relay protection platform hardware design method 100 based on the reliability of the component according to another embodiment of the present invention, and is not described herein.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The solutions in the embodiments of the present application may be implemented in various computer languages, for example, object-oriented programming language Java, and an transliterated scripting language JavaScript, etc.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (6)
1. A relay protection platform hardware design method based on component reliability is characterized by comprising the following steps:
determining the reliability of the relay protection device as pi R, and according to the reliability of the relay protection device; determining the failure rate of a statistical analysis system corresponding to the relay protection device as P 0 ＝1－∏R；
The method comprises the steps of evaluating components of the relay protection device, and determining the fault loss cost of the relay protection device, wherein the fault loss cost of the relay protection device comprises the fault loss cost of a mature relay protection device and the fault loss cost of a newly developed relay protection device;
comparing the fault loss cost of the mature relay protection device with the fault loss cost of the newly developed relay protection device, judging whether the newly developed relay protection device has an optimization space, and when the newly developed relay protection device has the optimization space, determining that the fault rate of the statistical analysis system is P 0 Determining an optimized space cost;
performing redundancy design on the newly-developed relay protection device, determining the reliability of the components after the redundancy design as RI, and determining the reliability of the newly-developed relay protection device after the redundancy design as pi R I ；
The reliability of the newly-developed relay protection device after the redundancy design is pi R I Reliability pi R with the mature relay protection device H Comparing, if the reliability of the newly developed relay protection device is pi R I The reliability pi R of the mature relay protection device is not less than H Determining that the technology for newly developing the relay protection device is feasible;
the method comprises the steps of evaluating components of the relay protection device, determining the fault loss cost of the relay protection device, wherein the fault loss cost of the relay protection device comprises the fault loss cost of a mature relay protection device and the fault loss cost of a newly-developed relay protection device, and comprises the following steps:
determining the failure loss cost of the relay protection device according to the number of the relay protection device, the failure rate, the failure average loss power and the failure average power failure time:
CL i ＝N·P i ·T·Pm
wherein CL is i For the fault loss cost of the relay protection device, P i For failure rate, T is failure average power failure time, pm is failure average loss power, wherein i is taken as 0 and is a mature relay protection device, and the failure loss cost of the mature relay protection device is CL 0 ＝N·P 0 T.Pm, i takes 1 as a newly developed relay protection device, and the fault loss cost of the newly developed relay protection device is CL 1 ＝N·P 1 ·T·Pm；
Comparing the fault loss cost of the mature relay protection device with the fault loss cost of the newly developed relay protection device, judging whether the newly developed relay protection device has an optimization space, and when the newly developed relay protection device has the optimization space, determining that the fault rate of the statistical analysis system is P 0 Determining an optimized space cost, comprising:
fault loss cost CL of the mature relay protection device 0 ＝N·P 0 T.Pm and the fault loss cost CL of the newly developed relay protection device 1 ＝N·P 1 Comparing T.Pm;
if CL 1 ＝N·P 1 ·T·Pm>CL 0 ＝N·P 0 T·pm, it is determined that there is an optimization space;
determining the optimized space cost as Δc=n· (P 1 －P 0 )·T·Pm。
2. The method of claim 1, further comprising, before determining the reliability of the relay protection device to be rr:
dividing the components forming the newly-developed relay protection device according to the reliability, and determining the components of the newly-developed relay protection device with different levels of reliability, wherein the components of the newly-developed relay protection device with different levels of reliability are immature components with low reliability, mature components with medium reliability and mature components with high reliability;
performing reliability weight assignment on components of the newly-developed relay protection device with different levels of reliability, and determining that the high reliability is R H The method comprises the steps of carrying out a first treatment on the surface of the The reliability of (1) is R M The method comprises the steps of carrying out a first treatment on the surface of the Low reliability of R L The reliability of the components of the mature relay protection device is R H 。
3. The method as recited in claim 1, further comprising:
determining the economic benefit of the newly developed relay protection device when the technology of the newly developed relay protection device is feasible;
the cost of a single newly developed relay protection device after the redundant design is determined is as follows:
CM i ＝N Hj ·C Hj +N Mj ·C Mj +N Lj ·C L ；
wherein N is Hj 、N Mj 、N Lj The number of the three types of components, namely an immature component with low reliability, a mature component with medium reliability and a mature component with high reliability, C Hj 、C Mj 、C Lj Costs of three types of components, namely an immature component with low reliability, a mature component with medium reliability and a mature component with high reliability, j is the j th of the three types of components, i is a different device scheme, i is taken as a mature relay protection device, i is taken as a 1, and the newly developed relay protection device;
when the delta C/N is more than or equal to (CM) i －CM 0 ) When the relay protection device is newly developed, the economic benefit is feasible;
when delta C/N<(CM i －CM 0 ) And in the process, the economic benefit of the newly-developed relay protection device is poor, wherein delta C is the optimized space cost of the newly-developed relay protection device.
4. A relay protection platform hardware design system based on component reliability is characterized by comprising:
the fault rate determining module is used for determining the reliability of the relay protection device as pi R and according to the reliability pi R of the relay protection device; determining the failure rate of a statistical analysis system corresponding to the relay protection device as P 0 ＝1－∏R；
The failure loss cost determining module is used for evaluating components of the relay protection device and determining failure loss cost of the relay protection device, wherein the failure loss cost of the relay protection device comprises failure loss cost of a mature relay protection device and failure loss cost of a newly developed relay protection device;
determining an optimized space cost module for relaying the maturityComparing the fault loss cost of the protection device with the fault loss cost of the newly-developed relay protection device, judging whether the newly-developed relay protection device has an optimization space, and when the newly-developed relay protection device has the optimization space, determining that the fault rate of the statistical analysis system is P 0 Determining an optimized space cost;
the redundancy reliability determining module is used for performing redundancy design on the newly-developed relay protection device, determining the reliability of the components after the redundancy design as RI, and determining the reliability of the newly-developed relay protection device after the redundancy design as pi R I ；
A determination technology feasible module for setting the reliability of the newly-developed relay protection device after the redundancy design to be pi R I Reliability pi R with the mature relay protection device H Comparing, if the reliability of the newly developed relay protection device is pi R I The reliability pi R of the mature relay protection device is not less than H Determining that the technology for newly developing the relay protection device is feasible;
determining a fault loss cost module comprising:
the fault loss cost determination submodule is used for determining the fault loss cost of the relay protection device according to the device number, the fault rate, the fault average loss power and the fault average power failure time of the relay protection device:
CL i ＝N·P i ·T·Pm
wherein CL is i For the fault loss cost of the relay protection device, P i For failure rate, T is failure average power failure time, pm is failure average loss power, wherein i is taken as 0 and is a mature relay protection device, and the failure loss cost of the mature relay protection device is CL 0 ＝N·P 0 T.Pm, i takes 1 as a newly developed relay protection device, and the fault loss cost of the newly developed relay protection device is CL 1 ＝N·P 1 ·T·Pm；
Determining an optimized space cost module comprising:
a fault loss cost comparison sub-module for comparing fault loss of the mature relay protection deviceLost cost CL 0 ＝N·P 0 T.Pm and the fault loss cost CL of the newly developed relay protection device 1 ＝N·P 1 Comparing T.Pm;
judging and optimizing a space sub-module for judging if CL 1 ＝N·P 1 ·T·Pm>CL 0 ＝N·P 0 T·pm, it is determined that there is an optimization space;
a determine optimization space cost sub-module for determining the optimization space cost as Δc=n (P 1 －P 0 )·T·Pm。
5. The system of claim 4, wherein determining the failure rate module comprises:
the component dividing submodule is used for dividing components forming the newly-developed relay protection device according to the reliability and determining the components of the newly-developed relay protection device with different levels of reliability, wherein the components of the newly-developed relay protection device with different levels of reliability are low-reliability immature components, medium-reliability mature components and high-reliability mature components;
the weight assignment sub-module is used for carrying out reliability weight assignment on the components of the newly-developed relay protection device with different levels of reliability, and determining that the high reliability is R H The method comprises the steps of carrying out a first treatment on the surface of the The reliability of (1) is R M The method comprises the steps of carrying out a first treatment on the surface of the Low reliability of R L The reliability of the components of the mature relay protection device is R H 。
6. The system of claim 4, further comprising:
the economic benefit determining module is used for determining the economic benefit of the newly developed relay protection device when the technology of the newly developed relay protection device is feasible;
the cost module for determining the redundancy single unit is used for determining the cost of a newly developed relay protection device after redundancy design as follows:
CM i ＝N Hj ·C Hj +N Mj ·C Mj +N Lj ·C L ；
wherein N is Hj 、N Mj 、N Lj The number of the three types of components, namely an immature component with low reliability, a mature component with medium reliability and a mature component with high reliability, C Hj 、C Mj 、C Lj Costs of three types of components, namely an immature component with low reliability, a mature component with medium reliability and a mature component with high reliability, j is the j th of the three types of components, i is a different device scheme, i is taken as a mature relay protection device, i is taken as a 1, and the newly developed relay protection device;
determining an economic benefit feasible module for determining that when the delta C/N is more than or equal to (CM) i －CM 0 ) When the method is used, the economic benefit of the newly developed relay protection device is determined to be feasible;
determining a module with poor economic benefit for determining the ratio delta C/N<(CM i －CM 0 ) And determining that the economic benefit of the newly-developed relay protection device is poor, wherein delta C is the optimized space cost of the newly-developed relay protection device.
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