Pole-mounted circuit breaker relay protection fixed value setting method and system

Abstract

The invention discloses a pole-mounted circuit breaker relay protection fixed value setting method and system, and the method comprises the following steps: S1, integrating distribution network protection data from an SCADA system, a DMS system and a GIS system through a data integration module, and carrying out the cleaning and verification of the received data; s2, establishing a fixed value sheet database through a fixed value sheet management module, and performing fixed value sheet full life cycle management; s3, reading the topological structure and the load condition of the power grid through an online setting module, inputting a given value setting algorithm, and automatically calculating and recommending a reasonable fixed value; s4, remote downloading of the constant value parameters is achieved through an online downloading module; s5, acquiring constant value information of the protection equipment in real time through an online monitoring module, and performing consistency verification on the acquired constant value information by using a constant value verification algorithm; s6, analyzing the action correctness of the protection device through an online evaluation module, and generating an evaluation report; according to the invention, automatic setting and online management of the distribution network protection setting value are realized, and the operation and maintenance level of the distribution network protection setting value is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of relay protection of electric power systems, and in particular to a method and system for setting relay protection values ​​of a pole-mounted circuit breaker. Background Art

[0002] In the pole-mounted circuit breaker relay protection device, some parameters for triggering its protection action are usually set according to the actual situation of the power system and the protection requirements. When a fault occurs in the power system, it can provide timely and effective protection to prevent the fault from expanding and ensure the safe and stable operation of the power grid.

[0003] The existing distribution network protection setting values ​​usually adopt manual calculation methods, which require manual judgment of various operating conditions. With the complexity of distribution network lines and the continuous changes in operation modes, the existing manual calculation methods have a large workload and low accuracy, and are increasingly difficult to meet the needs of on-site use; in addition, since the master station does not actively send setting values, it is difficult for on-site personnel to compare the protection setting value parameters before and after configuration when configuring the protection setting values, and it is impossible to confirm whether the new setting value is correct and whether the protection setting value is successfully configured; secondly, due to the lack of process-based management methods, the efficiency of distribution network protection setting work is low; based on the above problems, the management efficiency of distribution network protection setting values ​​is low, the reliability and safety are low, and it is difficult to adapt to the needs of the rapid development of modern power grids. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing distribution network protection setting value adopts manual calculation mode, which has a large workload, low accuracy, and lacks process management, resulting in low work efficiency. A method and system for setting the setting value of a pole-mounted circuit breaker relay protection are provided. By constructing four online functions of distribution network relay protection, automatic setting and online management of distribution network protection setting values ​​are realized, manual participation is reduced, and the operation and maintenance level of distribution network protection setting values ​​and the safe and stable operation of the distribution network are improved.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a method for setting the fixed value of a relay protection of a pole-mounted circuit breaker, comprising the following steps:

[0006] Step S1. Integrate distribution network protection data from SCADA, DMS, and GIS systems through the data integration module, clean and verify the received data, and ensure the timeliness and accuracy of the data;

[0007] Step S2. Through the value order management module, a value order database is established to manage the entire life cycle of the value order; specifically, it includes: the creation, review, approval, execution and archiving of the value order, as well as the automatic transfer and status update of the value order between different systems through the workflow engine;

[0008] Step S3. Read the grid topology and load conditions through the online setting module, input the given value setting algorithm, automatically calculate and recommend reasonable set values;

[0009] Step S4. Through the online download module, the remote download of the fixed value parameters is realized, and the consistency of the fixed value is verified through the call test and verification function;

[0010] Step S5. Through the online monitoring module, the protection device setting information is collected in real time, and the set value verification algorithm is used to perform consistency verification on the collected set value information to ensure the consistency of the set values ​​of each protection device;

[0011] The collected protection setting value information is compared with the setting value list of step S2 to evaluate the validity of the setting value;

[0012] Step S6: Analyze the correctness of the protection device's action through the online evaluation module and generate an evaluation report.

[0013] Preferably, the fixed value setting algorithm in step S3 specifically includes the following steps:

[0014] Step S31) reading the grid topology and load condition data;

[0015] Step S32) calculating the short-circuit current of each node according to the power grid topology structure of step 31);

[0016] Step S33) calculating the setting value of the protection device according to the type and setting principle of the protection device;

[0017] Step S34) verifies and adjusts the setting value of step S33) to ensure that the sensitivity and selectivity requirements of the protection device are met;

[0018] Step S35) recommends the set value to the user and generates a set value list.

[0019] Preferably, the step S4 specifically includes the following steps:

[0020] Step S41) establishes a remote communication channel with the distribution network protection device, the communication channel supports FTP / Modbus / IEC61850 protocol;

[0021] Step S42) remotely downloading the set value parameters to the protection device in the distribution network according to the online download module; the download mode supports batch operation and single operation;

[0022] Step S43) According to the call and test and verification functions, the protection device status is called and tested regularly or as needed, the set values ​​are verified to be consistent, and a verification report is generated.

[0023] Preferably, the fixed value verification algorithm in step S5 specifically includes the following steps:

[0024] Step S51) reading the setting information of each protection device;

[0025] Step S52) comparing the setting information of each protection device;

[0026] Step S53) determining whether there is a difference and generating a verification report;

[0027] Step S54) If there are any differences, the user is reminded to process them and a defect elimination work order is generated.

[0028] Preferably, the step S5 also includes: formulating a periodic inspection plan, automatically alerting for abnormal information that occurs during the inspection, and generating a defect elimination work order to initiate a defect elimination process.

[0029] Preferably, step S6 further includes the following steps:

[0030] (1) Analyze the correctness of the actions of relevant protection devices based on the post-analysis conclusions of various fault handling functions of the master station system, and initiate a defect handling process for closed-loop management of protection devices that do not act correctly;

[0031] (2) Collect the data on positive operation, false operation and refusal to operate of the protection devices in the area, conduct statistical analysis on the protection devices in the area based on the collected data, and generate an evaluation report that supports data export and printing functions.

[0032] A pole-mounted circuit breaker relay protection setting value setting system, the system comprises a data integration module, a setting value list management module, an online setting module, an online download module, an online monitoring module and an online evaluation module;

[0033] The data integration module is used to obtain distribution network protection data from SCADA, DMS, and GIS systems;

[0034] The fixed value order management module is used to manage the entire life cycle of the fixed value order;

[0035] The online setting module is responsible for the automatic setting of the distribution network protection setting value, generates the protection setting value by using the power grid topology and load conditions, and displays the setting value of the distribution network protection equipment through a graphical interface;

[0036] The online download module is used for remote download of distribution network protection fixed values, and the remote fixed value download can support batch operation and single operation;

[0037] The online monitoring module is responsible for real-time monitoring and consistency verification of distribution network protection settings;

[0038] Specifically, it includes: comparing the fixed value information of the real-time monitoring with the fixed value list, evaluating the validity of the fixed value, and performing consistency verification on the fixed value at regular intervals or as needed;

[0039] Formulate periodic inspection plans, automatically warn of abnormal information during inspections, and generate defect elimination work orders to initiate defect elimination processes;

[0040] The online evaluation module is responsible for correctness analysis of distribution network protection actions and defect handling.

[0041] Preferably, the data integration module has data cleaning and verification functions, and the data integration module can pre-process the received data.

[0042] Preferably, the online setting module can support manual adjustment and verification of set values.

[0043] Compared with the prior art, the beneficial effects of the present invention are: a method and system for setting the relay protection setting of a pole-mounted circuit breaker, which realizes automatic setting and online management of distribution network protection setting by constructing four online functions of distribution network relay protection, reduces manual participation, greatly reduces the workload of operation and maintenance personnel, and further improves the operation and maintenance level of distribution network protection setting and the safe and stable operation of the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is the overall flow chart of the present invention;

[0045] Figure 2 This is a flow chart of the value setting algorithm of the present invention;

[0046] Figure 3 This is the online downloading flow chart of the present invention;

[0047] Figure 4 This is a flow chart of the fixed value verification algorithm of the present invention;

[0048] Figure 5 Schematic diagram of the system structure of the present invention. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] See also Figure 1 The present invention provides a technical solution: a method for setting a fixed value of a relay protection of a pole-mounted circuit breaker, comprising the following steps:

[0051] Step S1. Integrate distribution network protection data from SCADA, DMS, and GIS systems through the data integration module, clean and verify the received data, and ensure the timeliness and accuracy of the data; in this embodiment, the SCADA, DMS, and GIS systems are SCADA monitoring and data acquisition system, DMS distribution management system, and GIS geographic information system respectively;

[0052] Step S2. Through the value order management module, a value order database is established to manage the entire life cycle of the value order; specifically, it includes: the creation, review, approval, execution and archiving of the value order, as well as the automatic transfer and status update of the value order between different systems through the workflow engine;

[0053] Step S3. Read the grid topology and load conditions through the online setting module, input the given value setting algorithm, automatically calculate and recommend reasonable set values;

[0054] Step S4. Through the online download module, the remote download of the fixed value parameters is realized, and the consistency of the fixed value is verified through the call test and verification function;

[0055] Step S5. Through the online monitoring module, the protection device setting information is collected in real time, and the set value verification algorithm is used to perform consistency verification on the collected set value information to ensure the consistency of the set values ​​of each protection device;

[0056] The collected protection setting value information is compared with the setting value list of step S2 to evaluate the validity of the setting value;

[0057] Step S6: Analyze the correctness of the protection device's action through the online evaluation module and generate an evaluation report.

[0058] See also Figure 2 The fixed value setting algorithm in step S3 specifically includes the following steps:

[0059] Step S31) reading the grid topology and load condition data;

[0060] Step S32) calculating the short-circuit current of each node according to the power grid topology structure of step 31);

[0061] Step S33) calculating the setting value of the protection device according to the type and setting principle of the protection device;

[0062] Step S34) verifies and adjusts the setting value of step S33) to ensure that the sensitivity and selectivity requirements of the protection device are met;

[0063] Step S35) recommends the set value to the user and generates a set value list.

[0064] See also Figure 3 , the step S4 specifically comprises the following steps:

[0065] Step S41) establishes a remote communication channel with the distribution network protection device, the communication channel supports FTP / Modbus / IEC61850 protocol;

[0066] Step S42) remotely downloading the set value parameters to the protection device in the distribution network according to the online download module; the download mode supports batch operation and single operation;

[0067] Step S43) According to the call and test and verification functions, the protection device status is called and tested regularly or as needed, the set values ​​are verified to be consistent, and a verification report is generated.

[0068] See also Figure 4 The fixed value verification algorithm in step S5 specifically includes the following steps:

[0069] Step S51) reading the setting information of each protection device;

[0070] Step S52) comparing the setting information of each protection device;

[0071] Step S53) determining whether there is a difference and generating a verification report;

[0072] Step S54) If there are any differences, the user is reminded to process them and a defect elimination work order is generated.

[0073] The step S5 also includes: formulating a periodic inspection plan, automatically issuing an alarm for abnormal information during the inspection, and generating a defect elimination work order to initiate a defect elimination process.

[0074] Step S6 in this embodiment also includes the following steps:

[0075] (1) Analyze the correctness of the actions of relevant protection devices based on the post-analysis conclusions of various fault handling functions of the master station system, and initiate a defect handling process for closed-loop management of protection devices that do not act correctly;

[0076] (2) Collect the data on positive operation, false operation and refusal to operate of the protection devices in the area, conduct statistical analysis on the protection devices in the area based on the collected data, and generate an evaluation report that supports data export and printing functions.

[0077] See also Figure 5 , a pole-mounted circuit breaker relay protection setting system, the system includes a data integration module, a setting list management module, an online setting module, an online download module, an online monitoring module and an online evaluation module;

[0078] The data integration module is used to obtain distribution network protection data from SCADA, DMS, and GIS systems;

[0079] The fixed value order management module is used to manage the entire life cycle of the fixed value order;

[0080] The online setting module is responsible for the automatic setting of the distribution network protection setting value, generates the protection setting value by using the power grid topology and load conditions, and displays the setting value of the distribution network protection equipment through a graphical interface;

[0081] The online download module is used for remote download of distribution network protection fixed values, and the remote fixed value download can support batch operation and single operation;

[0082] The online monitoring module is responsible for real-time monitoring and consistency verification of distribution network protection settings;

[0083] Specifically, it includes: comparing the fixed value information of the real-time monitoring with the fixed value list, evaluating the validity of the fixed value, and performing consistency verification on the fixed value at regular intervals or as needed;

[0084] Formulate periodic inspection plans, automatically warn of abnormal information during inspections, and generate defect elimination work orders to initiate defect elimination processes;

[0085] The online evaluation module is responsible for correctness analysis of distribution network protection actions and defect handling.

[0086] The data integration module described in this embodiment has data cleaning and verification functions, and the data integration module can pre-process the received data.

[0087] The online setting module described in this embodiment can support manual adjustment and inspection functions of the set value.

[0088] This embodiment realizes automatic setting and online management of distribution network protection settings by constructing four online functions of distribution network relay protection, reduces manual participation, greatly reduces the workload of operation and maintenance personnel, and further improves the operation and maintenance level of distribution network protection settings and the safe and stable operation of the distribution network.

[0089] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for setting a relay protection setting value of a pole-mounted circuit breaker, characterized in that: The steps include: Step S1. Integrate distribution network protection data from SCADA, DMS, and GIS systems through the data integration module, clean and verify the received data, and ensure the timeliness and accuracy of the data; Step S2. Through the value order management module, a value order database is established to manage the entire life cycle of the value order; specifically, it includes: the creation, review, approval, execution and archiving of the value order, as well as the automatic transfer and status update of the value order between different systems through the workflow engine; Step S3. Read the grid topology and load conditions through the online setting module, input the given value setting algorithm, automatically calculate and recommend reasonable set values; Step S4. Through the online download module, the remote download of the fixed value parameters is realized, and the consistency of the fixed value is verified through the call test and verification function; Step S5. Through the online monitoring module, the protection device setting information is collected in real time, and the set value verification algorithm is used to perform consistency verification on the collected set value information to ensure the consistency of the set values ​​of each protection device; The collected protection setting value information is compared with the setting value list of step S2 to evaluate the validity of the setting value; Step S6: Analyze the correctness of the protection device's action through the online evaluation module and generate an evaluation report.

2. A method for setting relay protection settings for a pole-mounted circuit breaker according to claim 1, characterized in that: The fixed value setting algorithm in step S3 specifically includes the following steps: Step S31) reading the grid topology and load condition data; Step S32) calculating the short-circuit current of each node according to the power grid topology structure of step 31); Step S33) calculating the setting value of the protection device according to the type and setting principle of the protection device; Step S34) checks and adjusts the setting value of step S33) to ensure that the sensitivity and selectivity requirements of the protection device are met; Step S35) recommends the set value to the user and generates a set value list.

3. A method for setting relay protection settings for a pole-mounted circuit breaker according to claim 1, characterized in that: The step S4 specifically includes the following steps: Step S41) establishes a remote communication channel with the distribution network protection device, the communication channel supports FTP / Modbus / IEC61850 protocol; Step S42) remotely downloading the set value parameters to the protection device in the distribution network according to the online download module; the download mode supports batch operation and single operation; Step S43) According to the call and test and verification functions, the protection device status is called and tested regularly or as needed, the set values ​​are verified to be consistent, and a verification report is generated.

4. A method for setting relay protection settings for a pole-mounted circuit breaker according to claim 1, characterized in that: The fixed value verification algorithm in step S5 specifically includes the following steps: Step S51) reading the setting information of each protection device; Step S52) comparing the setting information of each protection device; Step S53) determining whether there is a difference and generating a verification report; Step S54) If there are any differences, the user is reminded to process them and a defect elimination work order is generated.

5. A method for setting relay protection settings for a pole-mounted circuit breaker according to claim 1, characterized in that: The step S5 also includes: formulating a periodic inspection plan, automatically issuing an alarm for abnormal information during the inspection, and generating a defect elimination work order to initiate a defect elimination process.

6. A method for setting relay protection settings for a pole-mounted circuit breaker according to claim 1, characterized in that: The step S6 also includes the following steps: (1) Analyze the correctness of the actions of relevant protection devices based on the post-analysis conclusions of various fault handling functions of the master station system, and initiate a defect handling process for closed-loop management of protection devices that do not act correctly; (2) Collect the data on positive operation, false operation and refusal to operate of the protection devices in the area, conduct statistical analysis on the protection devices in the area based on the collected data, and generate an evaluation report that supports data export and printing functions.

7. A pole mounted circuit breaker relay protection setting value setting system according to any one of claims 1 to 6, characterized in that: The system includes a data integration module, a set value list management module, an online setting module, an online download module, an online monitoring module and an online evaluation module; The data integration module is used to obtain distribution network protection data from SCADA, DMS, and GIS systems; The fixed value order management module is used to manage the entire life cycle of the fixed value order; The online setting module is responsible for the automatic setting of distribution network protection settings, generates protection settings based on the power grid topology and load conditions, and displays the settings of distribution network protection equipment through a graphical interface; The online download module is used for remote download of distribution network protection fixed values, and the remote fixed value download can support batch operation and single operation; The online monitoring module is responsible for real-time monitoring and consistency verification of distribution network protection settings; Specifically, it includes: comparing the fixed value information of the real-time monitoring with the fixed value list, evaluating the validity of the fixed value, and performing consistency verification on the fixed value at regular intervals or as needed; Formulate periodic inspection plans, automatically warn of abnormal information during inspections, and generate defect elimination work orders to initiate defect elimination processes; The online evaluation module is responsible for correctness analysis of distribution network protection actions and defect handling.

8. A pole mounted circuit breaker relay protection setting value setting system according to claim 7, characterized in that: The data integration module has data cleaning and verification functions, and can pre-process the received data.

9. A pole mounted circuit breaker relay protection setting system according to claim 7, characterized in that: The online setting module can support manual adjustment and verification of set values.

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