CN104618064A - Monitoring method and device for static information based on CRC (Cyclic Redundancy Check) inspection - Google Patents
Monitoring method and device for static information based on CRC (Cyclic Redundancy Check) inspection Download PDFInfo
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Abstract
The invention discloses a monitoring method and a monitoring device for static information based on CRC (Cyclic Redundancy Check) inspection. The method comprises the steps of obtaining all static information of a relay protection device in a substation, and storing the static information to be binary data; taking the static information stored as the an information code for CRC checking, and calculating a corresponding CRC checking code through a CRC checking information algorithm; comparing the CRC checking code calculated with a preset checking code; transmitting an alarm signal to a centralized control center in a power grid according to a comparison result, if the CRC checking code is different from the preset checking code. In addition, the invention further discloses a static information monitoring device based on the CRC checking. According to the monitoring method provided by the invention, the workload of the operation and maintenance of equipment can be reduced reliably, the operation and maintenance efficiency can be improved, the checking accuracy of the information can be improved, and the powerful guarantee can be provided to the safe and stable operation of the power grid.
Description
Technical field
The present invention relates to grid equipment operation maintenance technical field, particularly relate to a kind of static information monitoring method based on CRC check and a kind of static information monitoring device based on CRC check.
Background technology
At present, intelligent grid construction enters Rapid development stage.The modern information technologies such as communication, computer, control combine more tight with traditional power technology, the digital transformer substation that intelligence degree is higher starts to put into operation.Along with the raising of integrated automation of transformation stations level, in standing, unattended operational mode is extensively carried out, and developed to 500kV voltage levels station by 110kV low-voltage-grade station gradually, " with a clad can " general layout that to be formed with District integrated control center be substation operation situations all in hinge remote monitoring district.The increase of unattended station number and the increase of scale, have higher requirement to the O&M ability of equipment.Under the prerequisite ensureing safety in production, reliability service, also more to pay attention to the efficiency and the accuracy that improve O&M.
At present, for the static information of equipment in electrical network, as definite value, open into state, alarm status, self-inspection state etc., being still of employing check item by item, check item by item, many people confirm method, audit process is loaded down with trivial details, is unfavorable for that operation maintenance personnel intuitively understands the ruuning situation of device rapidly.Meanwhile, people is that the project checked is more, occurs seeing by mistake, leak that the possibility of human errors such as seeing is larger, injures safety in production.
Summary of the invention
Based on this, the invention provides a kind of static information monitoring method based on CRC check and a kind of static information monitoring device based on CRC check.
Based on a static information monitoring method for CRC check, comprise the following steps:
Obtain every static information of protective relaying device in transformer station, described static information is stored as binary data;
Using the information code of the described static information of storage as CRC check, calculate corresponding CRC check code by CRC check algorithm;
The described CRC check code calculated and default check code are compared; Wherein, described default check code is the CRC check code corresponding when every static information of protective relaying device is all in normal condition;
According to described comparison result, if the described CRC check code and the described default check code that calculate are inconsistent, then to the centralized control center's transmission alarm signal in electrical network.
Compared with general technology; the static information of protective relaying device is incorporated into a state node into device by the static information monitoring method that the present invention is based on CRC check; utilize CRC check code as the unique identification of state node, in real time the current state of reflection state node.When protective relaying device normally runs, every static information all can not change, and CRC check code also can not change.If any one in static information changes, so CRC check code also can change thereupon.When CRC check code changes, produce alarm signal notice centralized control center plant running state and change.
After the present invention is applied, by the O&M efficiency of the protective relaying device that is greatly improved.When patrolling and examining protective relaying device, do not need to check one by one every static information again, only need check whether with numerical value during normal operation unanimously CRC check code.Reliably can reduce the workload of equipment O&M, improve O&M efficiency, lifting information checks accuracy, for power network safety operation provides powerful guarantee.
Based on a static information monitoring device for CRC check, comprise acquisition module, correction verification module, comparing module and alarm module;
Described acquisition module, for obtaining every static information of protective relaying device in transformer station, is stored as binary data by described static information;
Described correction verification module, for the described static information that will store as the information code of CRC check, calculates corresponding CRC check code by CRC check algorithm;
Described comparing module, for comparing the described CRC check code calculated and default check code; Wherein, described default check code is the CRC check code corresponding when every static information of protective relaying device is all in normal condition;
Described alarm module, for according to described comparison result, when the described CRC check code calculated and described default check code are inconsistent, to the centralized control center's transmission alarm signal in electrical network.
Compared with general technology; the static information of protective relaying device is incorporated into a state node into device by the static information monitoring device that the present invention is based on CRC check; utilize CRC check code as the unique identification of state node, in real time the current state of reflection state node.When protective relaying device normally runs, every static information all can not change, and CRC check code also can not change.If any one in static information changes, so CRC check code also can change thereupon.When CRC check code changes, produce alarm signal notice centralized control center plant running state and change.
After the present invention is applied, by the O&M efficiency of the protective relaying device that is greatly improved.When patrolling and examining protective relaying device, do not need to check one by one every static information again, only need check whether with numerical value during normal operation unanimously CRC check code.Reliably can reduce the workload of equipment O&M, improve O&M efficiency, lifting information checks accuracy, for power network safety operation provides powerful guarantee.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the static information monitoring method that the present invention is based on CRC check;
Fig. 2 is for the present invention is based on the system software architecture diagram adopted in static information monitoring method specific embodiment of CRC check;
Fig. 3 is the structural representation of the static information monitoring device that the present invention is based on CRC check.
Embodiment
For further setting forth the technological means that the present invention takes and the effect obtained, below in conjunction with accompanying drawing and preferred embodiment, to technical scheme of the present invention, carry out clear and complete description.
Refer to Fig. 1, for the present invention is based on the schematic flow sheet of the static information monitoring method of CRC check.
The present invention is based on the static information monitoring method of CRC check, comprise the following steps:
S101 obtains every static information of protective relaying device in transformer station, and described static information is stored as binary data;
S102, using the information code of the described static information of storage as CRC check, calculates corresponding CRC check code by CRC check algorithm;
The described CRC check code calculated and default check code are compared by S103; Wherein, described default check code is the CRC check code corresponding when every static information of protective relaying device is all in normal condition;
S104 is according to described comparison result, if the described CRC check code and the described default check code that calculate are inconsistent, then to the centralized control center's transmission alarm signal in electrical network.
CRC (Cyclic Redundancy Check, cyclic redundancy check (CRC) code) is a kind of error check code the most frequently used in data communication.The method utilizing CRC to realize error checking and correction is exactly according to the K position binary code data that will transmit at transmitting terminal, the picket code (i.e. CRC code) of a R bit check is produced with the rule determined, and after being attached to data message, forming new binary code data and send K+R position altogether.Receiving terminal is then followed same rule and is tested, to determine whether make mistakes in transmitting procedure.This rule, is called generator polynomial in Error control theory.
Any one code be made up of bit string can be only the multinomial one_to_one corresponding of 0 and 1 value with a coefficient.Such as, binary number 1011, the multinomial of its correspondence is G (x)=x
3+ x+1.If the generator polynomial that G (x) is CRC check, the rudimentary algorithm of CRC check is as follows:
The generator polynomial G (x) being R by the most high math power of x converts corresponding R+1 bit to;
Transmitting terminal to move to left needing the binary message code sent R position, and is equivalent to corresponding message polynomial C (x) × 2R;
Binary code corresponding with generator polynomial G (x) for binary message code after moving to left being done mould 2 except calculating (except being that highest order is alignd, everybody does XOR to mould 2), stopping calculating until remainder is R position;
By the remainder direct splicing of R position to the position vacated after information code moves to left, obtain complete CRC code;
After receiving terminal receives complete CRC code, then do to CRC code the computing that mould 2 removes equally, if remainder is 0, then transport process is correct; If not 0, then there is mistake in transport process.
CRC check conventional at present has CRC-8, CRC-16, CRC-32 tri-kinds.Wherein CRC-8 refers to that the most high math power of x in the generator polynomial of CRC check is 8, and also namely the data type of CRC check code is a byte character string; CRC-16 refers to that the most high math power of x in the generator polynomial of CRC check is 16, and also namely the data type of CRC check code is two byte character strings; CRC-32 refers to that the most high math power of x in the generator polynomial of CRC check is 32, and also namely the data type of CRC check code is four-byte character string; Generator polynomial G (x) corresponding to CRC-8, CRC-16, CRC-32 tri-kinds of verification modes is respectively:
As a preferred embodiment, in described acquisition transformer station every static information of protective relaying device step in, described static information comprise protective relaying device definite value, open into state, alarm status and self-inspection state.
By the definite value of protective relaying device, open and incorporate a state node into device into into static informations such as state, alarm status, self-inspection states.Due to protective relaying device definite value, open into state, alarm status, self-inspection state etc. all with binary data storage, so state node can be regarded as the bit string of a section very long.According to above-mentioned CRC check principle, if state node to be regarded as the information code of CRC check, then when generator polynomial G (X) determines, the CRC check code of existence anduniquess with it corresponding (the R position remainder of CRC check code for obtaining after move to left R position information code and generator polynomial mould 2 division operation), therefore CRC check code can be utilized as the unique identification of state node, the current state of reflection state node in real time.
As a preferred embodiment, after the step of the described CRC check code corresponding by the calculating of CRC check algorithm, comprise the following steps:
The described CRC check code calculated is sent to the centralized control center in electrical network.
When protective relaying device normally runs, definite value, open and all can not change into state, alarm status, self-inspection state, namely static information state node does not change, and CRC check code also can not change.Once definite value, open into state, alarm status, self-inspection state any one change, namely static information state node changes, and so CRC check code also can change thereupon.Therefore one section of code can be designed in device program, timing scan device static information state node, calculates the CRC check code of its correspondence, in liquid crystal display and teletransmission to centralized control center.When CRC check code changes, produce alarm signal notice operation maintenance personnel plant running state and change.
As a preferred embodiment, the described step being calculated corresponding CRC check code by CRC check algorithm, is comprised the following steps:
Corresponding CRC check code is calculated by a kind of checking algorithm in CRC-8, CRC-16 or CRC-32.
Consider the static information amount of device, checking precision and cpu load rate, the one in CRC-8, CRC-16, CRC-32 tri-kinds of verification modes can be adopted, select as the case may be thus increase the flexibility that the present invention is suitable for.
Refer to Fig. 2, for the present invention is based on the system software architecture diagram adopted in static information monitoring method specific embodiment of CRC check.
As a preferred embodiment, the described step described CRC check code calculated being sent to the centralized control center in electrical network, comprises the following steps:
The described CRC check code calculated is sent to the prudential sub-station in transformer station;
Described CRC check code is sent to the Prudential Master in centralized control center by the described prudential sub-station in transformer station.
Under CRC-32 mode, the data type of CRC check code is four-byte character string (CRC-16 is two bytes, and CRC-8 is a byte).Limit by station level stipulations, CRC check code cannot be uploaded to monitoring backstage and telecontrol communication machine by the mode of conventional remote measurement by device.With reference to the mode of protective relaying device protection information transmission, static information CRC check code might as well be sent in the content of protection information.
During using IEC-103 as station level agreement, the mode that protection information generally takes universal classification to serve is sent.The support of universal classification service data is 8 bit strings (STRING8) form in groups, therefore the four-byte character string of CRC-32 can divide in four groups of data and send.During using IEC-61850 as station level agreement, need in mounted cast, increase the DO that represents CRC check code, and under adding the data set of protection information to, realize with the calling of customer in response end sending.
CRC check code cannot pass through telecontrol system, can only rely in protection information system and deliver to centralized control center.Protection information substation slave station control layer network in transformer station collects CRC check code stored in real-time database, then on deliver to Prudential Master.
CRC check code send existence a defect with device parameter in form, namely can not as remote measurement initiatively on send, refresh in real time, can only with respond pattern that Prudential Master calls passive on give.Even if CRC check code there occurs change, if main website does not call, just cannot upgrade in time numerical value.Therefore, if the not open automatic-calling function of main website, need open, and set the suitable calling time in conjunction with substation data volume and main station system operating load, to meet the real-time of CRC check code.
In addition, in transformer station, the communication between prudential sub-station and protective relaying device, no matter what kinds of stations control layer protocol, the device parameter of device also can only respond substation always call together passive on give.Current substation all possesses the device timing function of always calling together, as long as always control the time of calling together equally well, meet the real-time of CRC check code.
As a preferred embodiment, the described step sending alarm signal to the centralized control center in electrical network, comprises the following steps:
Alarm signal is sent to the telecontrol system in transformer station;
Described alarm signal is sent to the centralized control center in electrical network by described telecontrol system.
Protective relaying device timing calculates CRC check code, and the present worth in the last look obtained and real-time database is compared, and whether both detections are consistent, if inconsistent, produces the signal of " CRC code change alarm ".This signal need be with maintenance, not with detecting and automatic resetting next time, by telecontrol system delivers to centralized control center.After operations staff receives this alarm, testing fixture definite value, open into state, alarm status, self-inspection state, judge that whether the change produced is normal, if abnormal, take next step measure, if normal, artificial this signal of involution.
" CRC code change alarm ", as one of self-check of device signal, its processing method is the same with other signals with upload mechanism, can the calling of customer in response end passive on give, can change again in rear active and send.Telecontrol communication machine receives stored in real-time database after the alarm signal that device send from station level, then is forwarded to centralized control center.This process can adopt the telemechanical transmission mode based on IEC-101 and IEC-104 agreement.
Compared with general technology; the static information of protective relaying device is incorporated into a state node into device by the static information monitoring method that the present invention is based on CRC check; utilize CRC check code as the unique identification of state node, in real time the current state of reflection state node.When protective relaying device normally runs, every static information all can not change, and CRC check code also can not change.If any one in static information changes, so CRC check code also can change thereupon.When CRC check code changes, produce alarm signal notice centralized control center plant running state and change.
After the present invention is applied, by the O&M efficiency of the protective relaying device that is greatly improved.When patrolling and examining protective relaying device, do not need to check one by one every static information again, only need check whether with numerical value during normal operation unanimously CRC check code.Reliably can reduce the workload of equipment O&M, improve O&M efficiency, lifting information checks accuracy, for power network safety operation provides powerful guarantee.
After the present invention is applied, by the O&M efficiency of the protective relaying device that is greatly improved and management mode:
When protective relaying device is patrolled and examined, no longer need to split and check one by one into, definite value, alarm, self-inspection state, only need check whether with numerical value during normal operation unanimously CRC check code.
Because the hard pressing plate of protective relaying device, soft pressing plate intuitively do not show mostly in centralized control center's supervisory control system, once pressing plate is moved back in miscarrying, distant place centralized control center is difficult to find.After adopting CRC check code, the change of pressing plate state can trigger " CRC code change alarm " signal immediately, is convenient to operations staff and grasps plant running situation in time.
Protective relaying device actual motion carries out fixed value modification or pressing plate often throwing because coordinating the change of power system operating mode is moved back.The CRC check code of protective relaying device can be sorted out archive management according to different power system operating modes; after operational mode change carries out end of operation to protective relaying device; check consistent whether with filing of CRC check code, whether determination operation is quickly and easily correct.
Refer to Fig. 3, for the present invention is based on the structural representation of the static information monitoring device of CRC check.
The present invention is based on the static information monitoring device of CRC check, comprise acquisition module 301, correction verification module 302, comparing module 303 and alarm module 304;
Described acquisition module 301, for obtaining every static information of protective relaying device in transformer station, is stored as binary data by described static information;
Described correction verification module 302, for the described static information that will store as the information code of CRC check, calculates corresponding CRC check code by CRC check algorithm;
Described comparing module 303, for comparing the described CRC check code calculated and default check code; Wherein, described default check code is the CRC check code corresponding when every static information of protective relaying device is all in normal condition;
Described alarm module 304, for according to described comparison result, when the described CRC check code calculated and described default check code are inconsistent, to the centralized control center's transmission alarm signal in electrical network.
As a preferred embodiment, also comprise check code sending module;
Described check code sending module, the CRC check code for being calculated by described correction verification module is sent to the centralized control center in electrical network.
When protective relaying device normally runs, definite value, open and all can not change into state, alarm status, self-inspection state, namely static information state node does not change, and CRC check code also can not change.Once definite value, open into state, alarm status, self-inspection state any one change, namely static information state node changes, and so CRC check code also can change thereupon.Therefore one section of code can be designed in device program, timing scan device static information state node, calculates the CRC check code of its correspondence, in liquid crystal display and teletransmission to centralized control center.When CRC check code changes, produce alarm signal notice operation maintenance personnel plant running state and change.
As a preferred embodiment, described correction verification module is used for calculating corresponding CRC check code by a kind of checking algorithm in CRC-8, CRC-16 or CRC-32.
Consider the static information amount of device, checking precision and cpu load rate, the one in CRC-8, CRC-16, CRC-32 tri-kinds of verification modes can be adopted, select as the case may be thus increase the flexibility that the present invention is suitable for.
As a preferred embodiment, described acquisition module is for obtaining every static information of protective relaying device in transformer station;
Described static information comprise protective relaying device definite value, open into state, alarm status and self-inspection state.
By the definite value of protective relaying device, open and incorporate a state node into device into into static informations such as state, alarm status, self-inspection states.Due to protective relaying device definite value, open into state, alarm status, self-inspection state etc. all with binary data storage, so state node can be regarded as the bit string of a section very long.According to above-mentioned CRC check principle, if state node to be regarded as the information code of CRC check, then when generator polynomial G (X) determines, the CRC check code of existence anduniquess with it corresponding (the R position remainder of CRC check code for obtaining after move to left R position information code and generator polynomial mould 2 division operation), therefore CRC check code can be utilized as the unique identification of state node, the current state of reflection state node in real time.
Compared with general technology; the static information of protective relaying device is incorporated into a state node into device by the static information monitoring device that the present invention is based on CRC check; utilize CRC check code as the unique identification of state node, in real time the current state of reflection state node.When protective relaying device normally runs, every static information all can not change, and CRC check code also can not change.If any one in static information changes, so CRC check code also can change thereupon.When CRC check code changes, produce alarm signal notice centralized control center plant running state and change.
After the present invention is applied, by the O&M efficiency of the protective relaying device that is greatly improved.When patrolling and examining protective relaying device, do not need to check one by one every static information again, only need check whether with numerical value during normal operation unanimously CRC check code.Reliably can reduce the workload of equipment O&M, improve O&M efficiency, lifting information checks accuracy, for power network safety operation provides powerful guarantee.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1., based on a static information monitoring method for CRC check, it is characterized in that, comprise the following steps:
Obtain every static information of protective relaying device in transformer station, described static information is stored as binary data;
Using the information code of the described static information of storage as CRC check, calculate corresponding CRC check code by CRC check algorithm;
The described CRC check code calculated and default check code are compared; Wherein, described default check code is the CRC check code corresponding when every static information of protective relaying device is all in normal condition;
According to described comparison result, if the described CRC check code and the described default check code that calculate are inconsistent, then to the centralized control center's transmission alarm signal in electrical network.
2. the static information monitoring method based on CRC check according to claim 1, is characterized in that, after the step of the described CRC check code corresponding by the calculating of CRC check algorithm, comprises the following steps:
The described CRC check code calculated is sent to the centralized control center in electrical network.
3. the static information monitoring method based on CRC check according to claim 2, is characterized in that, the described step described CRC check code calculated being sent to the centralized control center in electrical network, comprises the following steps:
The described CRC check code calculated is sent to the prudential sub-station in transformer station;
Described CRC check code is sent to the Prudential Master in centralized control center by the described prudential sub-station in transformer station.
4. the static information monitoring method based on CRC check according to claim 1; it is characterized in that; described acquisition transformer station in protective relaying device every static information step in, described static information comprise protective relaying device definite value, open into state, alarm status and self-inspection state.
5. the static information monitoring method based on CRC check according to claim 1, is characterized in that, the described step being calculated corresponding CRC check code by CRC check algorithm, is comprised the following steps:
Corresponding CRC check code is calculated by a kind of checking algorithm in CRC-8, CRC-16 or CRC-32.
6. the static information monitoring method based on CRC check according to claim 1, is characterized in that, the described step sending alarm signal to the centralized control center in electrical network, comprises the following steps:
Alarm signal is sent to the telecontrol system in transformer station;
Described alarm signal is sent to the centralized control center in electrical network by described telecontrol system.
7. based on a static information monitoring device for CRC check, it is characterized in that, comprise acquisition module, correction verification module, comparing module and alarm module;
Described acquisition module, for obtaining every static information of protective relaying device in transformer station, is stored as binary data by described static information;
Described correction verification module, for the described static information that will store as the information code of CRC check, calculates corresponding CRC check code by CRC check algorithm;
Described comparing module, for comparing the described CRC check code calculated and default check code; Wherein, described default check code is the CRC check code corresponding when every static information of protective relaying device is all in normal condition;
Described alarm module, for according to described comparison result, when the described CRC check code calculated and described default check code are inconsistent, to the centralized control center's transmission alarm signal in electrical network.
8. the static information monitoring device based on CRC check according to claim 7, is characterized in that, also comprise check code sending module;
Described check code sending module, the CRC check code for being calculated by described correction verification module is sent to the centralized control center in electrical network.
9. the static information monitoring device based on CRC check according to claim 7, is characterized in that, described correction verification module is used for calculating corresponding CRC check code by a kind of checking algorithm in CRC-8, CRC-16 or CRC-32.
10. the static information monitoring device based on CRC check according to claim 7, is characterized in that, described acquisition module is for obtaining every static information of protective relaying device in transformer station;
Described static information comprise protective relaying device definite value, open into state, alarm status and self-inspection state.
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| CN113178842B (en) * | 2021-05-11 | 2023-11-17 | 广东电网有限责任公司广州供电局 | Relay protection constant value monitoring method and device, relay protection equipment and storage medium |
| CN113470210A (en) * | 2021-06-30 | 2021-10-01 | 广东电网有限责任公司 | Fixed value rapid inspection method and system of safety automatic device and storage medium |
| CN113489794A (en) * | 2021-07-07 | 2021-10-08 | 智洋创新科技股份有限公司 | Communication interaction method for intelligent identification master station and intelligent station end equipment of transformer substation |
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Effective date of registration: 20200921 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |