CN111737875B - Active power unbalance rate analysis and diagnosis method, system and computer equipment - Google Patents
Active power unbalance rate analysis and diagnosis method, system and computer equipment Download PDFInfo
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- G06F30/20—Design optimisation, verification or simulation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- G—PHYSICS
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- G06F2119/06—Power analysis or power optimisation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
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Abstract
The application discloses an active power unbalance analysis and diagnosis method, a system and computer equipment, wherein the method comprises the following steps: s10: establishing a primary equipment element model, and configuring element model parameters according to voltage levels; s20: importing and identifying measurement and control device information in the SCD file; s30: matching the measurement and control device information with a primary equipment element model to generate a primary main wiring system; s40: sampling data information of the measurement and control device is extracted, and a corresponding primary equipment element model in a primary main wiring system is displayed to form active power flow information; s50: calculating the total active power unbalance rate of the total station; s60: dividing voltage class areas to calculate active power unbalance rate; s70: and (5) carrying out regional diagnosis analysis on the grade voltage. According to the application, through carrying out voltage class area calculation and analysis and diagnosis on the active power, the analysis and diagnosis range is reduced, the active power unbalance reason is rapidly found out, and the intelligent transformer station is prevented from operating in an unbalance alarm state for a long time.
Description
Technical Field
The application relates to the technical field of power system protection and debugging, in particular to an active power unbalance rate analysis and diagnosis method, an active power unbalance rate analysis and diagnosis system and computer equipment.
Background
Along with the rapid development of the intelligent power grid, the construction scale of the intelligent substation is continuously expanded, however, in recent years, the phenomenon that the active power unbalance rate of the intelligent substation is large for a long time often occurs, the intelligent substation is scheduled and checked and simultaneously causes great threat to the safe and stable operation of the power grid, the active power unbalance rate of the intelligent substation meets the requirement of the scheduling operation and is the premise of safe and stable operation of the intelligent substation and the large power grid, and meanwhile, when the active power unbalance rate of the intelligent substation is large, the reason cannot be quickly found out, and the problem cannot be solved, so that the intelligent substation operates in an unbalanced alarm state for a long time.
Disclosure of Invention
Aiming at the prior art, the application aims to solve the technical problem that when the existing intelligent substation has a large active power unbalance rate, the cause cannot be quickly found out, so that the intelligent substation can operate in an unbalance alarm state for a long time. Accordingly, an active power imbalance rate analysis and diagnosis method, system and computer device are provided.
The application is realized by the following technical scheme:
s10: establishing an element model of primary equipment of the intelligent substation, and configuring parameters of the element model according to voltage levels;
s20: importing an SCD file of the intelligent substation, and identifying measurement and control device information in the SCD file;
s30: matching the measurement and control device information with the primary equipment element model to generate a primary main wiring system;
s40: extracting sampling data information of the measurement and control device, and displaying the sampling data information in the primary equipment element model corresponding to the primary main wiring system to form active power flow information;
s50: total active power unbalance rate calculation of the total station: calculating the total active power unbalance rate of the intelligent substation according to the active power flow information and the sampling data information;
s60: calculating the active power unbalance rate of the voltage class area: if the total active power unbalance rate exceeds a threshold range, dividing the area according to the voltage grade to calculate the active power unbalance rate of each area;
s70: voltage class regional diagnostic analysis: and carrying out unbalance diagnosis analysis on the calculated voltage class area with the active power unbalance rate not equal to 0, and obtaining a diagnosis result.
Optionally, the intelligent substation primary equipment comprises a bus, a line, a bus bar, a transformer, a CT transformer, a PT transformer and a circuit breaker.
Further, the step S10 includes configuring parameters of the element model according to four voltage levels of 220kv, 110kv, 35kv and 10kv, and specifically includes:
performing transformation ratio configuration on a CT transformer and a PT transformer;
carrying out parameter configuration on the line length, the inductive reactance, the impedance, the capacitive reactance and the compensation coefficient of the line;
and carrying out parameter configuration on the main transformer impedance, the transformation ratio characteristic, the load loss and the no-load loss.
Optionally, the sampled data information includes voltage sampling information, current sampling information, active power information, power factor information, breaker position information, and knife switch position information.
Optionally, the measurement and control device information includes line measurement and control device information, bus measurement and control device information, transformer measurement and control device information and bus joint measurement and control device information.
Further, the step S30 specifically includes the following steps:
s31: matching the information of the line measurement and control devices with the voltage levels of 220kv, 110kv, 35kv and 10kv with line element models with corresponding voltage levels;
s32: matching the bus measurement and control device information of 220kv, 110kv, 35kv and 10kv with bus element models of corresponding voltage grades;
s33: matching the information of the transformer measurement and control devices of 220kv, 110kv, 35kv and 10kv with transformer element models of corresponding voltage grades;
s34: matching the information of the bus-tie measurement and control device with 220kv, 110kv, 35kv and 10kv with a bus-tie element model with corresponding voltage level;
s35: and after the measurement and control device information is completely matched with the primary equipment element model, a primary main wiring system is generated.
Optionally, the step S70 specifically includes:
comparing the line, main transformer side, bus voltage and current information of each voltage class area of 220kv, 110kv, 35kv and 10kv with the bus voltage information of the corresponding voltage class to obtain active power unbalance factors which are abnormal voltage acquisition, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault;
and analyzing current, voltage, active power and non-power information of the transformer at 220kv, 110kv, 35kv and 10kv sides by combining with the load loss rate of the configured transformer to obtain an active power unbalance factor which is abnormal load loss of the transformer.
And combining the current, voltage, active power and reactive power information of the configured transformer impedance, variable bit analysis transformers 220kv, 110kv, 35kv and 10kv sides to obtain the active power unbalance factors which are abnormal voltage of the transformer system and abnormal voltage of an outlet.
An active power imbalance analysis diagnostic system comprising:
the model building module is used for building a primary equipment element model for primary equipment of the intelligent substation;
the parameter configuration module is used for carrying out parameter configuration on the primary equipment element model;
the importing identification module is used for importing the SCD file of the intelligent substation and identifying the measurement and control device information in the SCD file;
the matching generation module is used for matching the measurement and control device information with the primary equipment element model and generating a primary main wiring system
The extraction and formation module is used for extracting sampling data information of the measurement and control device and displaying and forming active power flow information in the primary equipment element model corresponding to the primary main wiring system;
the computing module is used for computing the total active power unbalance rate of the intelligent substation and the active power unbalance rate of each voltage class area;
the judging module is used for judging whether the total active power unbalance rate exceeds a threshold range and judging whether the active power unbalance rate of each voltage class area is 0;
and the analysis and diagnosis module is used for analyzing the voltage class area with the active power unbalance rate not being 0 and diagnosing the active power unbalance factors.
Further, the analytical diagnostic module includes:
the first diagnosis and analysis unit is used for calculating current, voltage and active power information of 220kv, 110kv, 35kv and 10kv sides of the total station, comprehensively diagnosing whether the active power of the total station is balanced, and determining an active imbalance area according to voltage levels when the active power of the total station is unbalanced;
the second diagnosis and analysis unit is used for comparing the 220kV voltage level region line, the 220kV main transformer side, the bus voltage and current information with bus voltage information of corresponding voltage levels when the total station active power is unbalanced, comprehensively calculating whether the active power in the 220kV voltage level region is balanced or not, and obtaining that the active power unbalance factors are abnormal 220kV voltage acquisition, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault if the active power unbalance factors are unbalanced;
the third diagnosis and analysis unit is used for comparing the 110kV voltage level area line, the 110kV main transformer side, the bus voltage and current information with the bus voltage information of the corresponding voltage level when the total station active power is unbalanced, comprehensively calculating whether the active power in the 110kV voltage level area is balanced or not, and obtaining that the active power unbalance factor is 110kV voltage acquisition abnormality, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault if the active power unbalance factor is unbalanced;
the fourth diagnosis analysis unit is used for comparing the 35kV voltage class area line, the 22035kV main transformer side, the bus voltage and current information with bus voltage information of corresponding voltage classes when the total station active power is unbalanced, comprehensively calculating whether the active power in the 35kV voltage class area is balanced or not, and obtaining that the active power unbalance factors are abnormal 35kV voltage acquisition, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault if the active power unbalance factors are unbalanced;
the fifth diagnosis and analysis unit is used for comparing the line, the 10kV main transformer side, the bus voltage and current information of the 10kV voltage class area with the bus voltage information of the corresponding voltage class when the total station active power is unbalanced, comprehensively calculating whether the active power of the 10kV voltage class area is balanced or not, and obtaining that the active power unbalance factors are 10kV voltage acquisition abnormality, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault if the active power unbalance factors are unbalanced;
the sixth diagnostic analysis unit is used for analyzing current, voltage, active power and reactive power information of the 220kv, 110kv, 35kv and 10kv sides of the transformer in combination with the configured transformer load loss rate to obtain an active power unbalance factor as transformer load loss;
and a seventh diagnosis and analysis unit, which is used for analyzing the current, voltage, active power and reactive power information of the transformer 220kv, 110kv, 35kv and 10kv sides in combination with the configuration transformer impedance and the variable bit property to obtain the active power unbalance factors which are the abnormal voltage of the transformer system and the abnormal voltage of the outlet.
A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing an active power imbalance analysis diagnostic method as described above when executing the computer program.
Compared with the prior art, the application has the following advantages and beneficial effects:
the application provides an active power unbalance rate analysis and diagnosis method, a system and computer equipment, which are characterized in that a primary equipment element model is built for primary equipment of an intelligent substation, parameter configuration is carried out according to voltage levels, measurement and control device information in an SCD file is imported and identified, a primary main wiring system is generated in a matching mode, whether a threshold range is exceeded or not is judged by calculating total active power unbalance rate of the total station, when the threshold range is exceeded, the active power unbalance rate is calculated according to voltage levels in a zoned mode, and reasons are analyzed and diagnosed for voltage zones with the active power unbalance rate being different from 0, so that zoned diagnosis analysis is carried out according to the voltage levels, the analysis and diagnosis range is reduced, the active power unbalance reasons can be rapidly found, and the intelligent substation is prevented from running in an unbalance warning state for a long time.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
FIG. 1 is a flow chart of an active power imbalance rate analysis and diagnosis method according to an embodiment of the present application;
FIG. 2 is a schematic diagram showing a specific flow of step S30 in FIG. 1;
FIG. 3 is a schematic diagram of a primary main wiring system according to a first embodiment of the present application;
FIG. 4 is a schematic diagram of an active power imbalance analysis and diagnosis for each voltage class according to a first embodiment of the present application;
fig. 5 is a schematic diagram of a functional module of an active power unbalance rate analysis and diagnosis system according to a second embodiment of the present application.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present application, the present application will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present application and the descriptions thereof are for illustrating the present application only and are not to be construed as limiting the present application.
At present, the calculation simulation and the control adjustment of the active power of the power flow of the large power grid are carried out in China, no research on the diagnosis and analysis reasons of the active power unbalance of the transformer substation is carried out, however, the phenomenon that the active power unbalance rate of the power station is large for a long time frequently occurs in the intelligent transformer substation in recent years, which causes great threat to the safe and stable operation of the power grid, but the reasons causing the active power unbalance cannot be found out rapidly at present, so that the intelligent transformer substation operates in an unbalance alarm state for a long time.
Therefore, the application provides an active power unbalance analysis and diagnosis method, an active power unbalance analysis and diagnosis system and computer equipment based on an intelligent substation, which mainly aims to solve the problem that the cause of the active power unbalance cannot be found out quickly when the active power unbalance rate is large in the prior art.
Example 1
As shown in fig. 1, the application provides a transformer substation active power unbalance analysis and diagnosis method, which comprises the following steps:
s10: establishing an intelligent substation primary equipment element model, and configuring primary equipment element model parameters according to voltage levels;
the primary equipment of the intelligent substation comprises, but is not limited to, a bus, a line, a bus, a transformer, a CT transformer, a PT transformer and a circuit breaker, and the element model is a bus element model, a line element model, a bus element model, a transformer element model and the like which are established according to the primary equipment.
The voltage levels comprise four voltage levels of 220kv, 110kv, 35kv and 10kv, and particularly comprise the transformation ratio configuration of a CT transformer and a PT transformer; carrying out parameter configuration on the line length, inductive reactance, impedance, capacitive reactance and compensation coefficient of the line; and carrying out parameter configuration on the main transformer impedance, the transformation ratio characteristic, the load loss and the no-load loss.
S20: importing an SCD file of the intelligent substation, and identifying measurement and control device information in the SCD file;
the SCD file is a total station system configuration information file and comprises system configuration information of the whole intelligent substation. The measurement and control device information comprises, but is not limited to, line measurement and control device information, bus measurement and control device information, transformer measurement and control device information and bus joint measurement and control device information.
S30: matching the measurement and control device information with a primary equipment element model to generate a primary main wiring system;
the primary wiring system is generated by matching the parameters of each element in the measurement and control device information with the parameters configured by the primary equipment element model according to the voltage level, and can embody the data information of the whole intelligent substation, so that the whole intelligent substation can be intuitively analyzed, and a foundation is provided for the follow-up active power calculation, analysis and diagnosis.
S40: sampling data information of the measurement and control device is extracted, and a corresponding primary equipment element model in a primary main wiring system is displayed to form active power flow information;
specifically, the IP address of the measurement and control device in the SCD file of the intelligent substation is automatically read, then the sampling data information of the measurement and control device is extracted at the station control layer of the intelligent substation, the sampling data information is displayed in the corresponding primary equipment element model of the primary main wiring system, and the active power flow information is formed according to the sampling data information in the primary equipment element model display.
The sampling data information comprises voltage sampling information, current sampling information, active power information, power factor information, breaker position information and disconnecting link position information.
S50: first total station calculation: calculating the total active power unbalance rate of the intelligent substation according to the active power flow information and the sampling data information;
s60: second voltage class area calculation: if the total active power unbalance rate exceeds the threshold range, carrying out region division according to the voltage class to calculate the active power unbalance rate of each region;
the calculation formula of the active power unbalance rate is as follows:P into (I) For active power input, P Out of Is active power output; and the active power input and the active power output are judged according to the combination of the active power flow information and the sampling data information, so that the total station active power unbalance rate and the active power unbalance rate of each voltage class area can be calculated conveniently.
When the calculated total station active power unbalance rate exceeds +/-1%, the active power unbalance rate is calculated according to the voltage levels (namely 220kv, 110kv, 35kv and 10 kv), the total active power unbalance rate of the total station is calculated and judged to be larger or not, and then voltage level area calculation and judgment are further carried out, so that the analysis and diagnosis range can be shortened, and the quick finding of the reason of the active power unbalance is realized.
S70: and carrying out unbalance diagnosis analysis on the calculated voltage class area with the active power unbalance rate not equal to 0, and obtaining a diagnosis result.
And carrying out positioning analysis and diagnosis on the voltage class area with the active power unbalance rate not equal to 0, reducing the analysis and diagnosis range, and realizing quick finding out of the active power unbalance reason.
According to the active power unbalance analysis and diagnosis method provided by the application, a primary equipment element model is built for primary equipment of an intelligent substation, parameter configuration is carried out on the primary equipment element model according to voltage class, then an intelligent substation SCD file is imported, measurement and control device information in the SCD file is identified, and a primary main wiring system is generated; the method comprises the steps of extracting sampling data information of a measurement and control device through communication access of an intelligent substation station control layer, and displaying the sampling data information in a corresponding primary equipment model in a primary main wiring system to form active power flow information; calculating the total active power unbalance rate of the intelligent substation according to the active power flow information and the sampling data information, judging whether the active power exceeds +/-1%, and if so, carrying out regional division according to the voltage class to calculate the active power unbalance rate of each region; and finally, carrying out unbalance diagnosis analysis on the voltage class area with the calculated active power unbalance rate not equal to 0, and obtaining a diagnosis result. The active power unbalance rate is calculated through voltage class area division, the analysis and diagnosis range is reduced, the active power unbalance reason can be rapidly found out, and the intelligent substation is prevented from running in an unbalance alarm state for a long time.
As shown in fig. 2, step 30, matching the measurement and control device information with the element model to generate a primary main wiring system, specifically includes the following steps:
s31: matching the 220kv, 110kv, 35kv and 10kv line measurement and control device information with the line element model of the corresponding voltage class;
s32: matching the bus measurement and control device information of 220kv, 110kv, 35kv and 10kv with bus element models of corresponding voltage grades;
s33: matching 220kv, 110kv, 35kv and 10kv transformer measurement and control device information with transformer element models of corresponding voltage classes;
s34: matching the information of the bus-tie measurement and control devices of 220kv, 110kv, 35kv and 10kv with the bus-tie element models of corresponding voltage grades;
s35: and after the information of the measurement and control device is completely matched with the primary equipment element model, a primary main wiring system is generated.
The line measurement and control device information, the bus measurement and control device information, the transformer measurement and control device information and the bus joint measurement and control device information are matched with corresponding primary element models of corresponding grades, a primary main wiring system is automatically generated after the matching is completed, and the measurement and control device information is associated, so that a foundation is provided for subsequent calculation of active power unbalance rate and analysis and diagnosis.
As shown in fig. 3, if all the intelligent substation is in the active power balance state, namely the active power of all the substation:
P1+P2+P9+P10+P13+P14+P15+P16＝0。
220kV region: p1+p2+p4+p5=0;
220kV I parent region: p1+p3+p4=0;
220kV II parent region: p2+ (-p3) +p5=0.
1# main variable region: p4+p6+p11=0;
2# main variable region: p5+p7+p12=0.
110kV zone: p6+p7+p9+p10=0;
110kV I parent region: p6+p8+p9=0;
110kV II parent region: p7+ (-p8) +p10=0.
10kV region: p11+p12+p13+p14+p15+p16=0;
10kV I parent region: p11+p13+p4+p17=0;
10kV II parent region: p12+p15+p16+p17=0.
In practical application, the active power of the whole station is not 0, and the active power of each voltage class area is not 0, so the application calculates and judges the active power unbalance rate of the whole station firstly, then calculates and judges the active power unbalance rate of each voltage class area, positions the voltage class area of the active power unbalance, reduces the analysis and diagnosis range, and rapidly finds out the reason of the active power unbalance.
As shown in fig. 4, step 70, performing imbalance diagnosis analysis on the voltage class area with the calculated active power imbalance ratio not equal to 0 and obtaining a diagnosis result, specifically includes the following steps:
comparing the line, main transformer side, bus voltage and current information of each voltage class area of 220kv, 110kv, 35kv and 10kv with the bus voltage information of the corresponding voltage class to obtain active power unbalance factors which are abnormal voltage acquisition, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault;
and analyzing current, voltage, active power and non-power information of the transformer at 220kv, 110kv, 35kv and 10kv sides by combining with the load loss rate of the configured transformer to obtain an active power unbalance factor which is abnormal load loss of the transformer.
And combining the current, voltage, active power and reactive power information of the configured transformer impedance, variable bit analysis transformers 220kv, 110kv, 35kv and 10kv sides to obtain the active power unbalance factors which are abnormal voltage of the transformer system and abnormal voltage of an outlet.
The measurement and control device in the voltage class area of the active power unbalance is positioned for analysis, and a corresponding diagnosis result is obtained, namely, the active power unbalance factor is one or more of CT abnormality, PT abnormality, current acquisition abnormality, voltage acquisition abnormality, acquisition precision abnormality, power factor abnormality, merging unit abnormality, main transformer voltage ratio abnormality, load loss abnormality and main transformer output system voltage abnormality, so that the reason of the active power unbalance can be rapidly found, the follow-up corresponding measures are convenient to solve, and the stable operation of the intelligent substation is maintained.
The active power unbalance analysis and diagnosis method provided by the application is applied to an intelligent substation, a primary equipment element model is built for primary equipment of the intelligent substation, parameter configuration is carried out on the primary equipment element model according to voltage levels, then an intelligent substation SCD file is imported, measurement and control device information in the SCD file is identified, and a primary main wiring system is generated; the method comprises the steps of extracting sampling data information of a measurement and control device through communication access of an intelligent substation station control layer, and displaying the sampling data information in a corresponding primary equipment model in a primary main wiring system to form active power flow information; calculating the total active power unbalance rate of the intelligent substation according to the active power flow information and the sampling data information, judging whether the active power exceeds +/-1%, and if so, carrying out regional division according to the voltage class to calculate the active power unbalance rate of each region; and finally, carrying out unbalance diagnosis analysis on the voltage class area with the calculated active power unbalance rate not equal to 0, and obtaining a diagnosis result. The active power unbalance rate is calculated through voltage class area division, the analysis and diagnosis range is shortened, and the cause of the active power unbalance can be rapidly found out.
Example two
As shown in fig. 5, the present embodiment provides an active power unbalance analysis and diagnosis system, including:
the model building module is used for building a primary equipment element model for primary equipment of the intelligent substation;
the parameter configuration module is used for carrying out parameter configuration on the primary element model;
the importing identification module is used for importing the SCD file of the intelligent substation and identifying the measurement and control device information in the SCD file;
the matching generation module is used for matching the measurement and control device information with the primary equipment element model and generating a primary main wiring system
The extraction and formation module is used for extracting sampling data information of the measurement and control device and displaying and forming active power flow information in a corresponding primary equipment element model in the primary main wiring system;
the computing module is used for computing the total active power unbalance rate of the intelligent substation and the active power unbalance rate of each voltage class area;
a judging module for judging the total active power unbalance rate and the active power unbalance rate of each voltage class area,
the analysis and diagnosis module is used for analyzing the active power unbalance rate of each voltage class area and diagnosing the active power unbalance factors.
Wherein the analysis and diagnosis module comprises a first diagnosis and analysis unit, a second diagnosis and analysis unit, a third diagnosis and analysis unit, a fourth diagnosis and analysis unit, a fifth diagnosis and analysis unit, a sixth diagnosis and analysis unit and a seventh diagnosis and analysis unit,
the first diagnosis and analysis unit is used for calculating current, voltage and active power information of 220kv, 110kv, 35kv and 10kv sides of the total station, comprehensively diagnosing whether the active power of the total station is balanced, and determining an active imbalance area according to voltage levels when the active power of the total station is unbalanced;
the second diagnosis and analysis unit is used for comparing the 220kV voltage level region line, the 220kV main transformer side, the bus voltage and current information with bus voltage information of corresponding voltage levels when the total station active power is unbalanced, comprehensively calculating whether the active power in the 220kV voltage level region is balanced or not, and obtaining that the active power unbalance factors are abnormal 220kV voltage acquisition, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault if the active power unbalance factors are unbalanced;
the third diagnosis and analysis unit is used for comparing the 110kV voltage level area line, the 110kV main transformer side, the bus voltage and current information with the bus voltage information of the corresponding voltage level when the total station active power is unbalanced, comprehensively calculating whether the active power in the 110kV voltage level area is balanced or not, and obtaining that the active power unbalance factor is 110kV voltage acquisition abnormality, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault if the active power unbalance factor is unbalanced;
the fourth diagnosis analysis unit is used for comparing the 35kV voltage class area line, the 22035kV main transformer side, the bus voltage and current information with bus voltage information of corresponding voltage classes when the total station active power is unbalanced, comprehensively calculating whether the active power in the 35kV voltage class area is balanced or not, and obtaining that the active power unbalance factors are abnormal 35kV voltage acquisition, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault if the active power unbalance factors are unbalanced;
the fifth diagnosis and analysis unit is used for comparing the line, the 10kV main transformer side, the bus voltage and current information of the 10kV voltage class area with the bus voltage information of the corresponding voltage class when the total station active power is unbalanced, comprehensively calculating whether the active power of the 10kV voltage class area is balanced or not, and obtaining that the active power unbalance factors are 10kV voltage acquisition abnormality, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault if the active power unbalance factors are unbalanced;
the sixth diagnostic analysis unit is used for analyzing current, voltage, active power and reactive power information of the 220kv, 110kv, 35kv and 10kv sides of the transformer in combination with the configured transformer load loss rate to obtain an active power unbalance factor as transformer load loss;
and a seventh diagnosis and analysis unit, which is used for analyzing the current, voltage, active power and reactive power information of the transformer 220kv, 110kv, 35kv and 10kv sides in combination with the configuration transformer impedance and the variable bit property to obtain the active power unbalance factors which are the abnormal voltage of the transformer system and the abnormal voltage of the outlet.
For a specific limitation of the active power unbalance analysis and diagnosis system, reference may be made to the limitation of the active power unbalance analysis and diagnosis method in the first embodiment, and the description thereof will not be repeated here. The various modules in the active power imbalance analysis diagnostic system described above may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
Example III
The present embodiment provides a computer device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the active power unbalance analysis diagnosis method as described above, such as steps S10 to S70 shown in fig. 1, when executing the computer program. Alternatively, the processor, when executing the computer program, implements the functions of the modules/units of the active power unbalance analysis diagnosis system in the above embodiment, for example, the functions of the modules shown in fig. 4. In order to avoid repetition, a description thereof is omitted.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the application, and is not meant to limit the scope of the application, but to limit the application to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (8)
1. An active power imbalance analysis and diagnosis method is characterized by comprising the following steps:
s10: establishing an intelligent substation primary equipment element model, and configuring parameters of the primary equipment element model according to voltage levels;
s20: importing an SCD file of the intelligent substation, and identifying measurement and control device information in the SCD file;
s30: matching the measurement and control device information with the primary equipment element model to generate a primary main wiring system;
s40: extracting sampling data information of the measurement and control device, and displaying the sampling data information in the primary equipment element model corresponding to the primary main wiring system to form active power flow information;
s50: total active power unbalance rate calculation of the total station: calculating the total active power unbalance rate of the intelligent substation according to the active power flow information and the sampling data information;
s60: calculating the active power unbalance rate of the voltage class area: if the total active power unbalance rate exceeds a threshold range, dividing the area according to the voltage grade to calculate the active power unbalance rate of each area;
s70: hierarchical voltage region diagnostic analysis: carrying out unbalance diagnosis analysis on the calculated voltage class area with the active power unbalance rate not equal to 0 and obtaining a diagnosis result;
the step S70 specifically includes:
comparing the line, main transformer side, bus voltage and current information of each voltage class area of 220kv, 110kv, 35kv and 10kv with the bus voltage information of the corresponding voltage class to obtain active power unbalance factors which are abnormal voltage acquisition, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault;
analyzing current, voltage, active power and non-power information of the transformer at 220kv, 110kv, 35kv and 10kv sides by combining with the load loss rate of the configured transformer to obtain an active power unbalanced factor which is abnormal load loss of the transformer;
and combining the configuration transformer impedance, the variable bit characteristic analysis transformers 220kv, 110kv, 35kv and 10kv side currents, voltages and active power to obtain the active power unbalance factors which are abnormal voltage of the transformer system and abnormal voltage of an outlet.
2. The active power unbalance analysis and diagnosis method according to claim 1, wherein the primary equipment of the intelligent substation comprises a bus bar, a line, a bus bar, a transformer, a CT transformer, a PT transformer and a circuit breaker.
3. The active power unbalance analysis and diagnosis method according to claim 2, wherein the step S10 includes configuring parameters of the element model according to four voltage levels of 220kv, 110kv, 35kv and 10kv, and specifically includes:
performing transformation ratio configuration on a CT transformer and a PT transformer;
carrying out parameter configuration on the line length, the inductive reactance, the impedance, the capacitive reactance and the compensation coefficient of the line;
and carrying out parameter configuration on the main transformer impedance, the transformation ratio characteristic, the load loss and the no-load loss.
4. The active power imbalance analysis and diagnosis method of claim 1, wherein the sampling data information includes voltage sampling information, current sampling information, active power information, power factor information, breaker position information, and knife switch position information.
5. The active power unbalance analysis and diagnosis method according to claim 2, wherein the measurement and control device information includes line measurement and control device information, bus measurement and control device information, transformer measurement and control device information and bus joint measurement and control device information.
6. The active power unbalance analysis and diagnosis method according to claim 5, wherein the step S30 specifically comprises the steps of:
s31: matching the information of the line measurement and control devices with the voltage levels of 220kv, 110kv, 35kv and 10kv with line element models with corresponding voltage levels;
s32: matching the bus measurement and control device information of 220kv, 110kv, 35kv and 10kv with bus element models of corresponding voltage grades;
s33: matching the information of the transformer measurement and control devices of 220kv, 110kv, 35kv and 10kv with transformer element models of corresponding voltage grades;
s34: matching the information of the bus-tie measurement and control device with 220kv, 110kv, 35kv and 10kv with a bus-tie element model with corresponding voltage level;
s35: and after the measurement and control device information is completely matched with the primary equipment element model, a primary main wiring system is generated.
7. An active power imbalance analysis and diagnosis system, comprising:
the model building module is used for building a primary equipment element model for primary equipment of the intelligent substation;
the parameter configuration module is used for carrying out parameter configuration on the primary equipment element model;
the importing identification module is used for importing the SCD file of the intelligent substation and identifying the measurement and control device information in the SCD file;
the matching generation module is used for matching the measurement and control device information with the primary equipment element model and generating a primary main wiring system
The extraction and formation module is used for extracting sampling data information of the measurement and control device and displaying and forming active power flow information in the primary equipment element model corresponding to the primary main wiring system;
the analysis and diagnosis module is used for analyzing and diagnosing the active power of the total station and the active power of each voltage class area;
the analytical diagnostic module includes:
the first diagnosis and analysis unit is used for calculating current, voltage and active power information of 220kv, 110kv, 35kv and 10kv sides of the total station, comprehensively diagnosing whether the active power of the total station is balanced, and determining an active imbalance area according to voltage levels when the active power of the total station is unbalanced;
the second diagnosis and analysis unit is used for comparing the 220kV voltage level region line, the 220kV main transformer side, the bus voltage and current information with bus voltage information of corresponding voltage levels when the total station active power is unbalanced, comprehensively calculating whether the active power in the 220kV voltage level region is balanced or not, and obtaining that the active power unbalance factors are abnormal 220kV voltage acquisition, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault if the active power unbalance factors are unbalanced;
the third diagnosis and analysis unit is used for comparing the 110kV voltage level area line, the 110kV main transformer side, the bus voltage and current information with the bus voltage information of the corresponding voltage level when the total station active power is unbalanced, comprehensively calculating whether the active power in the 110kV voltage level area is balanced or not, and obtaining that the active power unbalance factor is 110kV voltage acquisition abnormality, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault if the active power unbalance factor is unbalanced;
the fourth diagnosis analysis unit is used for comparing the 35kV voltage class area line, the 22035kV main transformer side, the bus voltage and current information with bus voltage information of corresponding voltage classes when the total station active power is unbalanced, comprehensively calculating whether the active power in the 35kV voltage class area is balanced or not, and obtaining that the active power unbalance factors are abnormal 35kV voltage acquisition, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault if the active power unbalance factors are unbalanced;
the fifth diagnosis and analysis unit is used for comparing the line, the 10kV main transformer side, the bus voltage and current information of the 10kV voltage class area with the bus voltage information of the corresponding voltage class when the total station active power is unbalanced, comprehensively calculating whether the active power of the 10kV voltage class area is balanced or not, and obtaining that the active power unbalance factors are 10kV voltage acquisition abnormality, three-phase current unbalance, CT current transformer precision or CT current transformer fault, PT transformer precision or PT transformer fault if the active power unbalance factors are unbalanced;
the sixth diagnostic analysis unit is used for analyzing current, voltage, active power and reactive power information of the 220kv, 110kv, 35kv and 10kv sides of the transformer in combination with the configured transformer load loss rate to obtain an active power unbalance factor as transformer load loss;
and a seventh diagnosis and analysis unit, which is used for analyzing the current, voltage, active power and reactive power information of the transformer 220kv, 110kv, 35kv and 10kv sides in combination with the configuration transformer impedance and the variable bit property to obtain the active power unbalance factors which are the abnormal voltage of the transformer system and the abnormal voltage of the outlet.
8. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the active power imbalance analysis diagnostic method according to any one of claims 1 to 6 when executing the computer program.
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