KR20080051630A - Generator operation data analysis system - Google Patents

Abstract

A system for analyzing operation data of a generator is provided to enhance the stable operation of a power system with facility improvement and operation rule rationalization of the generator by abstracting the measurement of sub service items received to improve the reliability of system operation, performing a precise analysis, and automating monitoring and discrimination. An EMS(Energy Management System)(30) receives effective power, ineffective power, terminal voltage, system frequency, automatic generation control mode, and target vale data from each generator(20). A database server(110) stores/manages reference data and the data received from the EMS. A system operation server(120) analyzes and manages an operation state of each generator in real-time by using the data received from the EMS. The system operation server analyzes governor free response amount, automatic generation control, and real-time reserved and ineffective power by using the received data.

Description

Generator Operation Data Analysis System

1 is a block diagram showing a generator operational performance analysis system of the present invention.

FIG. 2 is a block diagram illustrating a system operation server shown in FIG. 1.

3 is a block diagram showing the frequency response amount calculation shown in FIG.

4 is a block diagram showing the automatic power supply control analysis shown in FIG.

FIG. 5 is a block diagram illustrating real-time reserve force analysis shown in FIG. 2. FIG.

FIG. 6 is a block diagram illustrating reactive power analysis shown in FIG. 2. FIG.

Figure 7 is a block diagram showing the reference information and fault information management of the generator operation record analysis system of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: Generator operation analysis system 20: Generator

30: EMS 110: data server

120: grid operation server 122: frequency response amount calculation

123: automatic power supply control analysis 124: real-time reserve power analysis

126: reactive power analysis 127: reference information management

128: Failure Information Management

The present invention relates to a generator performance analysis system, and more particularly, to improve generator facilities through actualization of measurement values, refinement of analysis, automation of monitoring and discrimination for auxiliary service items provided to improve reliability of system operation. The present invention relates to a generator performance analysis system that can improve the stable operation of power systems through the rationalization of induction and operation standards.

In general, the information on the characteristics of the generator is a value obtained through the test during the maintenance of the generator, and there is a phenomenon that the characteristic is slightly different when operating in connection with the actual system.

However, there is no clear method that can be applied to the power market by comprehensively analyzing these phenomena.

In particular, the actual measurement and verification of the GF (Governor Free) performance that primarily prevents the frequency drop due to large generator dropout is required. In addition, in the real-time reserve power monitoring field, it is difficult to accurately calculate the reserve power because it does not reflect the generator plan maintenance and daily bidding amount. Therefore, it is time to improve the stable operation of power system through improved analysis and monitoring of auxiliary services.

The present invention has been made to solve the above problems, an object of the present invention is to automate the actualization of the measurement amount, refinement of the analysis, monitoring and discrimination for the auxiliary service items provided to improve the reliability of the system operation It is to provide a generator performance analysis system that can improve the power system stable operation by inducing the improvement of generator facilities and the rationalization of operating standards.

The present invention has the following configuration to achieve the above object.

Generator operating performance analysis system of the present invention, the EMS (Energy Management System-EMS) receiving the active power, reactive power, terminal voltage, grid frequency, automatic power supply control mode and the target value data from each generator; A data server for storing and managing data applied by the EMS; It comprises a; system operation server for analyzing and managing the operating state of each generator in real time using the data provided from the EMS.

In addition, the data server stores the data and reference information data provided from the EMS, the system operation server using the provided data Governor Free response amount, Automatic Generation Control, real-time reserve power and invalidity The power is analyzed, and the Governor free response analysis sets a reference value using the provided system frequency, and calculates the average value before the failure and the average value after the failure using the reference value to designate the difference between the calculated values. To display.

The automatic generation control analysis calculates a generator output variation with respect to a target frequency in a specific section, and determines whether the calculated output increase or decrease is normal with respect to the target value. The analysis provides values for the frequency following reserve power, automatic feed control reserve power and standby / alternative reserve power, and the reactive power analysis uses the data provided from the data server to output active power output and terminal voltage trends that should be responded to the generator. In addition, the analysis of the reactive power operation trend and the total reactive power reserves should be performed to evaluate the stability of the power system.

In addition, the reference information and the failure information is to be performed using the data provided by the EMS and the generator characteristic data.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1 or FIG. 2, the generator driving performance analysis system 10 includes a data server 110 and a system driving server 120. The active power, reactive power, It is connected to the generator 20 by EMS 30, which receives the terminal voltage, the grid frequency, the automatic power supply control mode and the target value data to be stored in the data server 110, the grid operation server The generator 120 performs the frequency response amount calculation 122, the automatic power supply control analysis 123, the real-time reserve power analysis 124, and the reactive power analysis 126 on the data provided from the data server 110. ) Can be checked in real time.

That is, using the active power, reactive power, terminal voltage, grid frequency, automatic power supply control mode and the target value data sent from the generator 20, frequency response amount calculation 122, automatic power supply control analysis 123, real-time backup power Obtained through the analysis 124 and the reactive power analysis 126, the user can check the respective values at all times so that the user can check the generator status in various forms such as failures that may occur in the generator 20, power generation amount of the generator, and supply amount. Will always be able to monitor. Here, the data for performing the monitoring function of the generator 20 is not stored in the data server 110 to perform the calculation directly, and to store only the data necessary for generator analysis. This is because the monitoring data of the received data is automatically updated when new data is received, and the analysis data is to provide necessary information so that the status of the generator can be checked at any time through the accumulated data.

On the other hand, the operation of the present invention by the above configuration will be described.

3 to 6, first, the frequency response amount calculation 122 sets a reference value using a provided system frequency, and calculates an average value before a failure occurs and an average value after a failure occurs using the reference value. It is possible to confirm the frequency response amount 122a of the entire generator, the frequency response amount 122b of the individual generators, and the automatic failure monitoring 122c to designate the difference value.

Referring to FIG. 3, in the embodiment of the frequency response calculation calculation 122, an average value for 20 seconds before a failure occurs and an average value for 50 seconds after a failure occurs, and the last five average values of each of these values are used as final response amounts. .

For example, the total frequency reserve power REV _GF The average response amount for the last five times of individual generators is called GFRQ _{i , AV} , the average response amount of each case is called GFRQ _i , and the latest data reduced to below 59.8 Hz is called last, and the frequency is below 59.8 Hz. Assuming that the average output is 10 seconds to 60 seconds after the drop, the change output, the frequency response is calculated as follows.

The exclusion condition in calculating the frequency response amount is calculated in the frequency response amount calculation when the reference output is operated outside the upper and lower frequency ranges, when a subsidiary service change bid is sent in advance, and when a frequency fixed operation instruction is issued by the central feed station. The fixed automatic monitoring 122c is performed to calculate the total generator frequency response amount 122a and the individual generator frequency response amount 122b.

Referring to FIG. 4, the automatic power supply control analysis 123 calculates a generator output variation with respect to a target value within a specific section, and determines whether the calculated output increase or decrease is normal for the target value, and analyzes the real-time reserve power. Provide values for frequency following reserve, automatic feed control reserve and standby / alternative reserve. For example, the automatic power supply control evaluation reference value 123a is set by using the output increase / decrease rate calculated by calculating the output variation per minute of the generator in the designated section, and the value is normal or less than the specified value. It is to be judged as bad. That is, although not shown in the drawing, the data generated by the calculation (upper and lower limit value of automatic power supply control, increase and decrease rate value), the output of the generator for each module, and the target value of the automatic power generation control value are output in graph form. Check back often. And the user can confirm the information on the normal and defective for each generator by the reference value through the automatic power supply control performance display (123b).

The automatic feed control analysis 123 is defined by the evaporation and decay equation.

Evaporation Equation

식이 성립된다.When the evaporation test results indicate that the Ramp-up Rate is RUR _test , the Ramp-Up Rate submitted as technical characteristics data is RUR, the end time of the test is Pend, and the test time converted into minutes is T _min .

The formula is established.

In addition, the water-repellent equation is not described because it has the same conditions as the evaporation equation.

Referring to FIG. 5, the reserve monitoring analysis 124 provides values for the frequency following reserve, automatic feed control reserve and standby / alternative reserve by the reserve power application reference value 124a and the individual generator reserve power indication 124b. .

The reserve power application reference value 124a is for a generator which is a sum of the frequency following response powers of the individual generators calculated through the frequency tracking analysis and the generator that is in the automatic power supply control operation mode. The automatic power supply control reserve for the reserve power calculated on the basis of the ramp rate at the current output, the standby reserve (operation) for the reserve power calculated on the basis of the evaporation rate for all generators currently in operation, Operation reserve for the sum of frequency follow-up, automatic feed control, standby (operation) reserve and standby reserve for the sum of standby reserve specified in power generation plan, and alternative reserve for the sum of alternative reserve specified in power generation plan ( Stop). That is, the reference data values obtained by the frequency following response amount analysis and the automatic power supply control analysis 123 are applied, and the necessary reserve powers are applied to each of them to be a reference for the production power and the available power amount.

Wherein each reference value setting formula is as follows.

에 의해 성립된다.Since the frequency tracking reserve power reference value has been described by the frequency following response amount analysis, description thereof will be omitted. The automatic power supply reserve power is REV _{AGC, which} is the output evaporation power for 1 minute, the smallest value of P _max and AGC _max is A _max, and the automatic power supply control power reserve of the general generator is REV _{AGC , i} . In other words, the REV _{AGC , cc} of the automatic generator control power of the composite generator is called CC, the generator output evaporation rate is called RR, the number of GTs currently operating among CC mode generators is called C _on and the number of GTs that can be supplied among CC mode generators. When we say Ca _vail ,

Is established by.

에 의해 이루어진다.And the formula for general generator is established by REV _{AGC , i} = Min (A _max -P _{max -} GFRO _{i , av} , RR * 5min),

Is made by.

On the other hand, the formulas for standby reserve (operation), standby reserve (stop), alternative reserve and operation reserve are as follows.

That is, by generating the corresponding data using the formulas for the reserve force and allowing the user to check the generated data, it is possible to always detect the generator.

The individual generator reserve power display 124b displays the production power and the reserve power generated by each generator by the value set in the reserve power application reference value 124a so that the user can check it at any time.

Referring to FIG. 6, the reactive power analysis 126 analyzes the PQ curve reactive power trend 126a, the reactive power operation trend and the total reactive power reserve power 126b, the active power output value 126c, and the terminal voltage trend 126d. The generator 20 sends the data server 110 to the data server 110, and the data server 110 uses the stored data to output the active power output value and the terminal voltage trend, the reactive power operation trend, and the total invalid. Analyze power reserves to perform power system stability assessments.

The active power analysis is established by the following equation.

에 의해 이루어진다.The generator output calculated according to the reported speed adjustment rate is called GOV _simul , the capacity of the generator is called P _rate , the speed adjustment _rate is called SR, and the generator output operating at the frequency of 60Hz is called P _ref .

Is made by.

In addition, the reactive power analysis is established by the following equation.

에 의해 이루어진다.When the individual generator reactive power reserve power is REV _{Q , i} , the reactive power upper limit value is Q _max , and the reactive power being operated is Q _i .

Is made by.

Meanwhile, the system operation server 10 may further perform the reference information management 127 and the failure information management 128 function using the provided data. This is the information on the individual generator rating, output upper and lower limits, frequency tracking upper and lower limits, floating band, speed adjustment rate, etc., which is applied to the frequency tracking response amount and the real-time reserve power calculation and displays the reference information so that the user can check them at once. The fault information management 128 is a fault that is applied to calculate a frequency following response amount, and stores a fault whose frequency is changed by 60 ± 0.2 Hz or more, so that the user can identify the fault time and the starting point of the accelerator response calculation. Can be modified. In addition, by storing the information for each fault generated by the generator to enable individual identification in the future it is possible to respond quickly.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

According to the generator operation performance analysis system of the present invention, through the actualization of the measured value, refinement of the analysis, automation of monitoring and discrimination of the auxiliary service items provided to improve the reliability of the system operation induction of generator facility improvement and operation criteria The rationalization can improve the stable operation of the power system.

Claims (8)

Energy Management System (EMS) for receiving active power, reactive power, terminal voltage, grid frequency, automatic power supply control mode and target value data from each generator; A data server for storing and managing data applied by the EMS; Generator operation record analysis system comprising a; operating system for analyzing and managing the operation state of each generator in real time using the data provided from the EMS. The method of claim 1, And the data server stores data provided from the MS and reference information data. The method of claim 1, The system operation server generator operation performance analysis system, characterized in that to analyze the frequency response (Governor Free) response, automatic generation control (Automatic Generation Control), real-time reserve power and reactive power using the provided data. The method of claim 3, wherein In the Governor free response amount analysis, a reference value is set using a provided system frequency, and the average value before the occurrence of a failure and the average value after the occurrence of a failure are calculated using the reference value to designate and display a difference value between the calculated values. Generator operation performance analysis system. The method of claim 3, wherein The automatic generation control analysis calculates the generator output variation with respect to the target frequency in a specific section and determines whether the calculated output increase or decrease is a normal value for the target value. Analysis system. The method of claim 3, wherein The real-time reserve power analysis generator generator performance analysis system, characterized in that to provide values for the frequency following reserve power, automatic feed control reserve power and standby / substitute reserve power. The method of claim 3, wherein The reactive power analysis is to perform a power system stability evaluation by analyzing the active power output value and terminal voltage trend, the reactive power operation trend, the total reactive power reserve power to be used to respond to the generator using the data provided from the data server. Generator operational performance analysis system. The method of claim 2, The reference information and failure information generator operating performance analysis system, characterized in that to perform using the data provided by the EMS and generator characteristics data.

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