CN110932242A - Method and system for setting service protection of hydraulic power plant - Google Patents
Method and system for setting service protection of hydraulic power plant Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
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Abstract
The invention belongs to service power relay protection, and particularly relates to a method for setting service power protection of a hydraulic power plant, which comprises the following steps: s1, modeling all electrical equipment of the hydraulic power plant; s2, establishing a relay protection configuration model corresponding to the electrical equipment according to the model of each electrical equipment; s3, establishing a graphical model of the hydropower station power utilization system according to the hydropower station power utilization system, in combination with the models of all the electrical equipment and the corresponding relay protection configuration models; s4, calculating the short-circuit current of the corresponding auxiliary power circuit according to the model of each electrical device; and S5, calculating the relay protection setting of each electrical device according to the graphical model and the short-circuit current, and establishing a protection fixed value database. The method improves the speed and efficiency of the setting calculation of the service power protection, ensures the accuracy of the calculation result, and relieves the heavy labor of the setting calculation personnel.
Description
Technical Field
The invention belongs to service power relay protection, and particularly relates to a method and a system for setting service power protection of a hydraulic power plant.
Background
In the whole power industry, relay protection technology and equipment are a very important branch, relay protection is a safety protection measure for safe and stable operation of a power grid and a hydraulic power plant, four characteristics of rapidity, selectivity, sensitivity and reliability of relay protection are generally reflected by the reliability of a protection device and the reasonability of setting protection values, and correct setting of relay protection setting values is a premise that the relay protection device acts correctly. The service power is a system for providing power for various auxiliary equipment and process equipment of a power plant and is a foundation in an electrical system of the power plant, the high quality of relay protection design of the service power is directly related to whether the service power can normally and reliably operate, once a problem occurs, the normal operation of the power plant equipment is directly influenced, a shutdown accident can be caused in serious cases, and even personal injury is caused, so the setting calculation work of the relay protection of the service power is very important. In recent years, due to the fact that attention on an auxiliary power system is insufficient, a certain error area also exists in setting calculation of relay protection of the auxiliary power system, and accidents of protection refusal and misoperation occur in a plurality of power plants, and unit outage time is more than 2 months seriously caused. Therefore, it is necessary to research the configuration and setting calculation of the relay protection of the power plant service power to maximally and reasonably configure the service power protection and ensure the reliable operation of the service power, thereby ensuring the safe and stable operation of the unit.
The factory power system has various types of related equipment, and the protection principles and protection configurations of different equipment are different, so that the setting calculation is complex and the workload is large, the protection devices of different manufacturers can be used in the same power plant, and the protection types of the manufacturers of different protection devices are different, so that the protection setting of the factory power is difficult. And because the service voltage level is low and is not directly related to the power grid, the relay protection setting calculation of the power grid is not paid enough attention for a long time. Compared with the relay protection condition of the main equipment of the power plant at the present stage, the related standards which can be referred to in the aspects of the relay protection setting calculation, the configuration and the like of the power plant are limited. The configuration and setting calculation of the service power relay protection mentioned by the existing standards and manuals shows that the configuration and setting calculation is reliable in theoretical aspect, but the operability in practical application is poor, and the guidance on field devices is not strong.
The protection configuration of the traditional power plant service power is simple, the load and the power incoming line generally adopt over-current protection or current quick-break protection as main protection, and low-voltage protection of a bus is used as backup protection, so that a protection system of the whole service power system is formed. The calculation method enables the protection constant value setting process to be simple, calculation rules are approximately similar, and the calculation method gradually becomes a commonly used algorithm of each power plant. However, with the rapid development of power systems, the complexity of the power grid structure is continuously deepened, and changes in the protection configuration and the fixed value are caused by changes in the system operation mode, equipment maintenance, commissioning of new equipment, and the like. The data volume is huge, the maintenance work is tedious and complicated, and errors are easy to make, the workload of calculation and matching of the relay protection setting value is increased, the complexity is greatly improved, and the traditional manual setting method cannot meet the requirements of the current power system. Therefore, the method has important significance for improving the speed and efficiency of setting calculation, ensuring the accuracy of a calculation result and removing the heavy labor of a setting calculation personnel by adopting an advanced calculation tool.
Disclosure of Invention
The invention aims to provide a method and a system for setting the service protection of a hydraulic power plant, which improve the speed and efficiency of the setting calculation of the service protection, ensure the accuracy of the calculation result and relieve the heavy labor of the setting calculation personnel.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for setting the service protection of a hydraulic power plant is characterized by comprising the following steps:
s1, modeling all electrical equipment of the hydraulic power plant;
s2, establishing a relay protection configuration model corresponding to the electrical equipment according to the model of each electrical equipment;
s3, establishing a graphical model of the hydropower station power utilization system according to the hydropower station power utilization system, in combination with the models of all the electrical equipment and the corresponding relay protection configuration models;
s4, calculating the short-circuit current of the corresponding auxiliary power circuit according to the model of each electrical device;
and S5, calculating the relay protection setting of each electrical device according to the graphical model and the short-circuit current, and establishing a protection fixed value database.
Further, the electrical device comprises an electrical energy generating, consuming and converting element, a circuit switch and a protection element.
Further, the step S1 of modeling all the electrical devices of the hydraulic power plant includes: and establishing an equivalent circuit model of the electrical equipment according to the characteristic parameters of the electrical equipment.
The utility model provides a calculation system is set in factory electricity protection of hydroelectric power plant which characterized in that: the system comprises a user interface layer, a core application layer, a data interface intermediate layer and a database;
the user interface layer comprises a management interface and an application program interface, is connected with the core application layer and the data interface middle layer and is used for realizing man-machine exchange and display lookup;
the core application layer comprises a graphical model of the power plant station power system, a short-circuit current calculation function, a setting calculation function and a report management function;
the data interface middle layer is used for providing various connection interfaces and connecting the user interface layer, the core application layer and the database;
the database comprises a model library, an algorithm library and a constant value library.
Further, the model library is used for storing electrical equipment models.
Further, the algorithm library is used for storing a short-circuit current calculation algorithm and a setting calculation algorithm.
Further, the constant value library is used for storing the protection constant value calculated by the setting calculation.
The invention has the beneficial effects that:
(1) the invention uses the modeling technology to create the electrical equipment and protection configuration model base, realizes graphical modeling, provides visual and intuitive topological structure chart and image display of the service system, and helps users to know the service system, set calculation and fault analysis.
(2) The invention improves the speed and the precision of the setting calculation through short-circuit current calculation and protection fixed value calculation algorithms.
(3) The software engineering technology is used for assisting in automatic calculation and setting of the service protection, the working efficiency of setting calculation is improved, and the intelligent and informatization development of the setting calculation of the service protection of the hydraulic power plant is promoted.
(4) The data are fully shared, application functions are integrated in the database, the platform is developed uniformly, organic combination and seamless connection of all function blocks are achieved, individual classes and public classes are managed respectively, data redundancy is reduced, and data relations are simplified.
(5) Comprehensive integration and automation. The relay protection constant value setting enters a full-automatic era of the setting process from the batch task processing automatic era. The method comprises the steps of drawing a network graph, calculating short-circuit current, inquiring a calculation result until adjusting a setting fixed value, wherein the steps are finished under a unified interface, and all parts use unified data and a unified style.
(6) And (4) fully-graphical human-computer interaction interface. The user can start almost all functions on the user interface layer, does not need to memorize a large number of operation commands, and can carry out data entry, modification and query, setting calculation and short circuit calculation only through a familiar network wiring diagram.
Drawings
FIG. 1 is a schematic diagram of a method for setting service protection of a hydraulic power plant.
FIG. 2 is a schematic diagram of a hydropower plant service protection setting calculation system.
Detailed Description
In order to better understand the present invention, the following embodiments are further described.
As shown in fig. 1, a method for setting service protection of a hydroelectric power plant includes the following steps:
s1, modeling all electrical equipment of the hydraulic power plant;
the hydroelectric power plant contains various electrical equipment, which mainly comprises electric energy generating, consuming and converting elements such as a synchronous generator, a transformer, a motor, a diesel generator, a bus, a cable, a reactor, a capacitor and the like, and circuit switches and protective elements such as a circuit breaker, an isolating switch, a grounding switch, a fuse, a lightning arrester and the like.
Each kind of equipment has specific functions and electrical characteristics and has various characteristic parameters, each kind of electrical equipment can be converted into a corresponding approximate equivalent circuit according to an electrical basic theory, the equivalent circuit is represented by an ideal electrical component combination, and equivalent parameters and external characteristics of the equipment under normal conditions and fault conditions can be obtained through the equivalent circuit and a parameter conversion matrix.
Based on an object modeling method in software engineering, various electrical equipment is divided according to the working principle and characteristic parameters of the electrical equipment, and an equivalent circuit model suitable for electrical short circuit calculation and setting calculation is constructed, so that the method is in line with the reality of a hydropower plant and is complete in description.
For setting calculation, the connection between the equipment model and the network topology does not need to be reconstructed every time of calculation, and the setting calculation result can be obtained only by confirming relevant parameters.
S2, establishing a relay protection configuration model corresponding to the electrical equipment according to the model of each electrical equipment;
at present, microcomputer protection products shaped on the market are often provided with protection function blocks with complete functions by manufacturers of protection devices in order to meet the requirements of different customers. And the setting calculation personnel determines to use the corresponding protection function block in the set of transformer protection according to the actual condition of the hydraulic power plant and the characteristics of the transformer so as to complete the corresponding protection function.
The difficulty in modeling the protection functions is that in addition to the standard-based protection functions, the equipment of each manufacturing plant has its own characteristics, and it is difficult to take into account the characteristics of all equipment products in the modeling.
The relay protection is a principle of a relay protection function which is finally combined by starting elements, braking elements, returning elements, locking elements and the like which form various logic relations by means of basic parameters of current, voltage, power, impedance, phase, time, frequency and the like of a circuit, and each basic relay protection principle derives different protection functions according to different protection objects (such as a generator, a transformer and a circuit), so that a complete relay protection function configuration model must be established, and the protection setting calculation has pertinence.
And modeling the relay protection function and the starting element, the braking element, the returning element and the locking element thereof according to each electrical equipment model, and establishing a protection function matching rule model. And the matching relation among the protection functions of all the elements is clear.
S3, establishing a graphical model of the hydropower station power utilization system according to the hydropower station power utilization system, in combination with the models of all the electrical equipment and the corresponding relay protection configuration models;
s4, calculating the short-circuit current of the corresponding auxiliary power circuit according to the model of each electrical device;
the calculation of the short-circuit current is the basis of the model selection, the relay protection setting and the accident analysis of the electrical equipment, the calculation of the short-circuit current adopts the per-unit value calculation standard, an electrical wiring short-circuit calculation sequence impedance network is established, effective network transformation is carried out, the short-circuit current calculation network is simplified, and the required short-circuit is calculated.
The short-circuit current calculation of the service power loop of the hydraulic power plant generally adopts a simplified algorithm, a unified per unit value calculation standard is adopted on the basis of electrical equipment model modeling, an equivalent loop is equivalently transformed by adopting a circuit theory principle, a short-circuit current calculation network is simplified, and a required short-circuit is finally calculated. The calculation objects are 0.4 kV-35 kV service buses and various load circuits. The purpose of the calculation is to calculate the action value of the protection function and the sensitivity check of the protection.
And S5, calculating the relay protection setting of each electrical device according to the graphical model and the short-circuit current, and establishing a protection fixed value database.
A hydraulic power plant service protection setting calculation system,
the system jointly develops software on the basis of Microsoft visual studio as a development platform and C # language and VB scripting language, a relational database Mysql is used for data storage, a high-performance extensible Mysql database architecture is designed in a standardized mode, and the core of the database is a model library and an algorithm library. The software development adopts a rapid prototyping mode in software engineering to gradually realize corresponding functions.
As shown in fig. 2, the system comprises a user interface layer, a core application layer, a data interface middle layer and a database;
the user interface layer comprises a management interface and an application program interface, is connected with the core application layer and the data interface middle layer and is used for realizing man-machine exchange and display lookup;
the user interface layer is an interface for interaction between software and a user, and comprises a general management interface and an application program interface, wherein the user formulates a setting calculation task, draws a system topological graph, inputs parameters, displays a setting result and the like through the user interface. The system can adopt a full-graphical human-computer interaction interface, provides a human-computer interface through a simple and visual graphical system interface, has a good human-computer interface, and has no special configuration requirement on a client; the man-machine interaction interface is friendly, simple, practical, flexible, reliable, visual, easy to learn and understand, and the configuration of the man-machine interaction interface of each module can be stored.
The core application layer comprises a graphical model of the power plant station power system, a short-circuit current calculation function, a setting calculation function and a report management function;
the core application layer refers to the core application of the system: the modeling and algorithm integration of the method for setting the service protection of the hydropower plant is realized by graphical modeling, short-circuit current calculation, setting calculation and report management. The data, the model, the algorithm and the calculation process are packaged through the early-stage hydropower plant electrical equipment modeling, the relay protection configuration model, the short-circuit current calculation algorithm and the setting calculation algorithm, and the functions of short-circuit current calculation, setting result output and the like are realized.
The data interface middle layer is used for providing various connection interfaces and connecting the user interface layer, the core application layer and the database;
the database comprises a model library, an algorithm library and a constant value library;
the data interface middle layer is connected with a database and a core application layer, the data related to relay protection is more, the database is a tool for storing, processing and managing data and comprises a model base (a service electric equipment model), a configuration base (a protection configuration model), an algorithm base (a short-circuit current calculation algorithm and a setting calculation algorithm), an object base (such as equipment element parameters, factory-provided data and the like), a fixed value base (used for storing protection fixed values calculated by setting calculation), and the data interface middle layer realizes the storage, analysis, query, interaction, sharing and management of the data.
The above description is only an application example of the present invention, and certainly, the present invention should not be limited by this application, and therefore, the present invention is still within the protection scope of the present invention by equivalent changes made in the claims of the present invention.
Claims (7)
1. A method for setting the service protection of a hydraulic power plant is characterized by comprising the following steps:
s1, modeling all electrical equipment of the hydraulic power plant;
s2, establishing a relay protection configuration model corresponding to the electrical equipment according to the model of each electrical equipment;
s3, establishing a graphical model of the hydropower station power utilization system according to the hydropower station power utilization system, in combination with the models of all the electrical equipment and the corresponding relay protection configuration models;
s4, calculating the short-circuit current of the corresponding auxiliary power circuit according to the model of each electrical device;
and S5, calculating the relay protection setting of each electrical device according to the graphical model and the short-circuit current, and establishing a protection fixed value database.
2. The method of setting service protection of a hydroelectric power plant according to claim 1, wherein said electrical equipment comprises electrical energy generating, consuming and converting elements, circuit switches and protection elements.
3. The method for setting power plant service protection of a hydraulic power plant according to claim 1, wherein the step S1 of modeling all electrical devices of the hydraulic power plant comprises: and establishing an equivalent circuit model of the electrical equipment according to the characteristic parameters of the electrical equipment.
4. The utility model provides a calculation system is set in factory electricity protection of hydroelectric power plant which characterized in that: the system comprises a user interface layer, a core application layer, a data interface intermediate layer and a database;
the user interface layer comprises a management interface and an application program interface, is connected with the core application layer and the data interface middle layer and is used for realizing man-machine exchange and display lookup;
the core application layer comprises a graphical model of the power plant station power system, a short-circuit current calculation function, a setting calculation function and a report management function;
the data interface middle layer is used for providing various connection interfaces and connecting the user interface layer, the core application layer and the database;
the database comprises a model library, an algorithm library and a constant value library.
5. The system according to claim 1, wherein the model base is used to store electrical equipment models.
6. The system according to claim 1, characterized in that the algorithm library is configured to store a short circuit current calculation algorithm and a setting calculation algorithm.
7. The system for setting calculation of service protection of hydraulic power plant according to claim 1, wherein the constant value library is configured to store the protection constant values calculated by the setting calculation.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510640A (en) * | 2020-11-05 | 2021-03-16 | 蔡永旭 | Power plant relay protection setting calculation method and system |
| CN113708335A (en) * | 2021-08-26 | 2021-11-26 | 西安热工研究院有限公司 | Method for checking power plant relay protection fixed value according to system impedance change range |
| CN116187248A (en) * | 2023-03-13 | 2023-05-30 | 华能新能源股份有限公司河北分公司 | Relay protection fixed value analysis and verification method and system based on big data |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290800A (en) * | 2011-08-12 | 2011-12-21 | 华东电网有限公司 | Method for checking relay protection setting |
| CN103928914A (en) * | 2014-03-31 | 2014-07-16 | 广东电网公司电力调度控制中心 | Relaying protection equipment setting method and device |
| CN107330159A (en) * | 2017-06-09 | 2017-11-07 | 中国神华能源股份有限公司 | The system calculated for Power System Intelligent |
-
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- 2019-12-04 CN CN201911224550.0A patent/CN110932242A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102290800A (en) * | 2011-08-12 | 2011-12-21 | 华东电网有限公司 | Method for checking relay protection setting |
| CN103928914A (en) * | 2014-03-31 | 2014-07-16 | 广东电网公司电力调度控制中心 | Relaying protection equipment setting method and device |
| CN107330159A (en) * | 2017-06-09 | 2017-11-07 | 中国神华能源股份有限公司 | The system calculated for Power System Intelligent |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112510640A (en) * | 2020-11-05 | 2021-03-16 | 蔡永旭 | Power plant relay protection setting calculation method and system |
| CN113708335A (en) * | 2021-08-26 | 2021-11-26 | 西安热工研究院有限公司 | Method for checking power plant relay protection fixed value according to system impedance change range |
| CN116187248A (en) * | 2023-03-13 | 2023-05-30 | 华能新能源股份有限公司河北分公司 | Relay protection fixed value analysis and verification method and system based on big data |
| CN116187248B (en) * | 2023-03-13 | 2023-08-25 | 华能新能源股份有限公司河北分公司 | Relay protection fixed value analysis and verification method and system based on big data |
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Application publication date: 20200327 |