KR101460859B1 - Device For Real Time Analysis On Energy Flow Unbalance - Google Patents

Abstract

Disclosed herein is an apparatus and method for analyzing an unbalanced state of input / output energy used in a power plant or a boiler in real time to protect equipment and human life during an emergency such as a failure.
For example, an energy imbalance real-time analyzing apparatus for monitoring an input / output energy flow rate of a system, comprising: a preprocessing unit for obtaining operation data of the system; A database building unit for standardizing operation data when the system is stable and setting the reference data as a reference signal and standardizing the operation data received by the preprocessing unit; An analyzer for analyzing the standardized operation data on the basis of the reference signal and analyzing whether the operation data is balanced or not; And a display unit that displays the standardized operation data as a vector and displays a central balance degree.

Description

[0001] The present invention relates to a device for real-

The present invention relates to an apparatus and a method for analyzing an unbalanced state of input / output energy used in a power plant or a boiler in real time to protect equipment and human life during an emergency such as a failure.

A failure may occur in a control system of a plant such as a power plant or a boiler. In the event of such a sudden failure, it is difficult for the operator to recognize the state at a glance due to abnormal operation state information poured in a moment, and when the operator loses the emergency emergency operation time, an accident such as a boiler explosion, turbine damage, fire, .

As failure monitoring technology, if the various signals of the plant exceeds the reference value, the alarm is sent out. However, there are cases where a lot of alarms are runaway at a time. In this case, it is difficult to grasp the fault condition necessary for stable operation of the plant. Further, there is a problem that when the manual control is required because the automatic control system does not work properly due to a failure, stable operation of the power plant can not be quickly achieved.

The present invention provides an apparatus and method for protecting equipment and human life in case of an emergency such as a failure by analyzing an unbalanced state of input / output energy used in a power plant or a boiler in real time.

An energy imbalance real-time analyzing apparatus according to the present invention is an energy imbalance real-time analyzing apparatus for monitoring an input / output energy flow rate of a system, comprising: a preprocessing unit for obtaining operation data of the system; A database building unit for standardizing operation data when the system is stable and setting the reference data as a reference signal and standardizing the operation data received by the preprocessing unit; An analyzer for analyzing the standardized operation data on the basis of the reference signal and analyzing whether the operation data is balanced or not; And a display unit for displaying the standardized operation data as a vector and displaying a central balance degree.

Here, the analyzer may include an alarm unit for generating an alarm when the difference between the reference signal and the standardized operation data is equal to or greater than a reference value.

The analysis unit may further include an input / output energy analyzing unit that analyzes at least one of a mass balance obtained by comparing the flow rates of the feed water and the steam in the operation data, and a thermal balance obtained by comparing the heat input and the steam output of the operation data, And an analysis unit.

Also, the display unit may display at least one of the mass balance and the thermal balance as a bar graph.

In addition, the display unit may display the stable region around the equilibrium point of the bar graph.

The analysis unit may include an input energy analysis unit for analyzing the balance by comparing the flow rates of water, fuel, and air among the operation data.

In addition, the display unit may display an equilateral triangle with respect to the flow rate of the water supply, fuel, and air, and may set the display point of the reference signal at the center of the circumscribed circle of the equilateral triangle.

In addition, when at least one of the water supply, the fuel, and the air flow rate is insufficient, the display unit may display the display point by moving the display point in the direction of the insufficient component.

In addition, the display unit may include an emergency action notification window for guiding the increase or decrease of at least one of the water supply, fuel, and air.

The apparatus for real-time energy unbalance analysis according to the present invention is characterized in that a flow rate of water supply, fuel, and air of a power plant or a boiler is represented by a regular triangle having an angle of 120 degrees and a center of the circumscribed circle is positioned based on a display point, By moving the point, the operator can display the insufficient component in real time in an emergency.

Also, the energy unbalance real-time analyzing apparatus according to the present invention displays the thermal balance and mass balance of the power plant or the boiler in real time, and displays the stable region, thereby informing the operator of the emergency.

1 is a configuration diagram of an energy unbalance real time analyzing apparatus according to an embodiment of the present invention.
FIG. 2 shows a screen displayed on a display unit of the energy unbalance real-time analyzing apparatus according to the embodiment of the present invention.
3 is a view showing a screen displayed on the display unit when the fuel imbalance real-time analyzing apparatus according to the embodiment of the present invention lacks fuel
4 is a flowchart illustrating an energy imbalance real-time analysis method according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

1 is a configuration diagram of an energy unbalance real time analyzing apparatus according to an embodiment of the present invention. FIG. 2 shows a screen displayed on the display unit in the energy unbalance real-time analyzing apparatus according to the embodiment of the present invention.

Referring to FIG. 1, an energy imbalance real-time analyzing apparatus 100 according to an embodiment of the present invention may include a preprocessing unit 110, a database building unit 120, an analyzing unit 130, and a display unit 140 .

The preprocessing unit 110 acquires operation data from the control system and performs a preprocessing operation to remove noise by primarily processing the operation data. The preprocessing unit 110 may include a signal acquisition unit 111 for acquiring a control signal, and a filtering unit 112 for filtering the signal.

The signal acquisition unit 111 acquires important operation data from an existing control system for a power plant or a boiler. Particularly, the signal acquisition unit 111 acquires three kinds of data of the fuel (fuel), air (air), and water (water) injected into the power plant or the boiler among the operation data. Further, the signal acquisition unit 111 may further acquire operation data of the steam flow rate, heat input to the boiler, and steam output amount. At this time, the signal acquisition unit 111 may use an interface through the serial communication, an analog hard wire connection method for each signal, or a combination of the two methods.

The filtering unit 112 receives the operation data signal from the signal acquisition unit 111 and filters it to remove noise. As the filtering method of the filtering unit 112, a method using a delay filter using a known electronic device or a software filtering method using a moving average method can be used.

The database construction unit 120 sets a reference signal and processes the received operation data so as to be compared with the reference signal to construct a database. The database construction unit 120 includes a reference signal setting unit 121 and a standardization unit 122.

The reference signal setting unit 121 sets a reference signal for each operation load or state. The reference signal setting unit 121 acquires a signal in a stable state for each load band in the signal acquisition unit 111 and filters the signal in the filtering unit 112 and outputs a signal obtained by standardizing the standardized signal in the standardization unit 122 Set and store as a reference signal. That is, the reference signal setting unit 121 standardizes operation data in a stable state, and sets and stores the reference data as a reference signal.

The normalization unit 122 processes and normalizes the operation data. The normalization unit 122 normalizes all the signals to a size of 1 to 100 based on the reference signal. Therefore, the operation data can be compared with the reference signal at a ratio of 1: 1.

The analysis unit 130 informs the user of an alarm when the reference signal is different from the standardized operation data by more than a reference value, calculates a heat balance and a mass balance, Calculate the balance of air flow rate. For this, the analysis unit 130 includes an alarm unit 131 and an energy balance analysis unit 132.

When the difference between the reference signal and the standardized operation data is equal to or greater than a reference value, the alarm unit 131 notifies the user through a sound such as a specific tone or voice, or an alarm through a control screen of the user.

The energy balance analyzing unit 132 includes an input / output energy analyzing unit 132a and an input energy balance analyzing unit 132b.

The input / output energy analysis unit 132a calculates thermal equilibrium in which the enthalpy according to the fuel flow rate and the heating flow rate of the power plant or the boiler, the enthalpy according to the temperature and the pressure of the boiler outlet steam, Simultaneously, the mass balance is calculated by comparing the boiler inlet feed flow rate to the boiler outlet steam flow rate.

The input / output energy analysis unit 132a calculates and standardizes the calories calculated by the fuel injected into the boiler, the calorific value calculated by the exit steam enthalpy and the flow rate. The calorific value calculated as fuel input considering boiler loss is as follows.

[Equation 1]

C _f = H _c · F _c · μ _b · k _b · 10 ^-8 [Gcal]

(Where, H _c: the fuel heating value _{[kcal / kg], F c} : the fuel flow [kg], _b μ: boiler efficiency [%], k _b: correction coefficient)

In addition, the output heat of a boiler using high pressure main increase due to boiler generated steam and low pressure reheated steam can be calculated as follows.

[Equation 2]

C _b = F _hs (H _ho -H _hi ) + F _ls (H _lo -H _li ) - 10 ^-6 [Gcal]

(Where F _hs : high-pressure steam flow rate [kg], F _ls : Steam Flow [kg], H _ho: high-pressure steam outlet enthalpy _{[kcal / kg], H hi} : high-pressure steam inlet enthalpy _{[kcal / kg], H lo} : low-pressure steam outlet enthalpy _{[kcal / kg], H li} : Enthalpy of low pressure steam inlet [kcal / kg])

In normal operation, the balance between the heat input and output of the boiler is compared with the steady state reference using the correction factor k _b so that the two calories of C _f and C _b are the same size.

Also, the input energy balance analyzing unit 132b calculates the three degrees of input water, fuel, and air flow rates of the boiler as a vector having a phase angle of 120 degrees, thereby calculating the balance degree. Here, the coordinates of the first signal (for example, the operation data of the normalized water supply) S1 displayed at the upper center (reference 0 degree) can be calculated as follows. Also, the coordinates of the actual S1 can be calculated by separating the horizontal component and the vertical component using the trigonometric function.

[Equation 3]

Similarly, the coordinates of the second signal S2 (e.g., the operation data of the normalized fuel) displayed on the lower left (120 degrees) can be calculated as follows.

[Equation 4]

Similarly, the coordinates of a third signal (e.g., normalized operation data of standardized air) S3 displayed on the lower right side (240 degrees) can be calculated as follows.

[Equation 5]

Using this, the unbalance degree coordinates using the above first to third signals (normalized operation data of water supply, fuel and air) can be calculated as follows.

[Equation 6]

As described later, the unbalance degree coordinates are used to indicate an element that is excessively short in water supply, fuel, and air when a graph is displayed on the display unit 140.

Referring to FIG. 2 together with FIG. 1, the display unit 140 displays a calculation result of the energy balance analysis unit 132 on the screen so that the user can intuitively recognize the state of the current process.

The display unit 140 may display the thermal balance and the mass balance calculated in the input / output energy analysis unit 132a in the form of a bar graph. In addition, the display unit 140 displays a comfort zone to a certain distance about the equilibrium point with respect to the thermal balance bar graph 141 and the mass balance bar graph 142, If the graph is shifted toward the direction, the operator should be able to identify it with the naked eye.

In addition, the display unit 140 displays a flow rate of the water supply, fuel, and air by a center balance diagram (143), and arranges the flow rate of the water supply, fuel and air at an angle of 120 degrees with respect to the center of the circumscribed circle of the equilateral triangle Can be displayed. In addition, the display unit 140 can display the display point in the center of the circle in the reference state in which the balance of the three flow rates is maintained. Also, the display unit 140 allows the display point to move toward the smaller flow rate in three directions, so that the operator can intuitively grasp the components of water supply, fuel, and air.

In addition, the display unit 140 can inform the operator through the emergency action notification window 144 of which one of water supply, fuel and air should be increased or decreased in an emergency. Also, the display unit 140 may alert the system status window 145 whether the system is normal or in an emergency.

3 is a view showing a screen displayed on the display unit when the fuel imbalance real-time analyzing apparatus according to the embodiment of the present invention lacks fuel

Referring to FIG. 3, in the case of fuel shortage, the indication point, which should be located at the center of the circle of the central balance degree 143, is displayed biased in the direction of the fuel (formed at the bottom left). Accordingly, the operator can intuitively know that the fuel is insufficient as compared with other constitutions (water supply, air) by viewing the screen, thereby increasing the flow rate of the fuel or reducing the flow rate of other constituents (water supply, air) And the like.

Hereinafter, an energy imbalance real-time analysis method according to an embodiment of the present invention will be described.

4 is a flowchart illustrating an energy imbalance real-time analysis method according to an embodiment of the present invention.

Referring to FIG. 4, the energy unbalance real-time analysis method according to an embodiment of the present invention includes a signal acquisition and preprocessing step S10, a database data building step S20, an energy balance analysis step S30, ), And emergency driving operation guide step (S50).

In the signal acquisition and preprocessing step S10, an interface through a serial communication in the signal acquisition unit 111 of the preprocessing unit 110, an analog hardwire connection method for each signal, or a combination of these two methods is applied to the power plant or the boiler And acquires important operation data from the existing control system. Particularly, the signal acquisition unit 111 can acquire three kinds of data of fuel, fuel, air and water injected into the power plant or the boiler among the operation data. In the signal acquisition and preprocessing step S10, the filtering unit 112 of the preprocessing unit 110 receives the operation data signal from the signal acquisition unit 111 and uses a delay filter using an electronic device Or a software filtering method using a moving average method to filter out the noise.

In the database data building step S20, the reference signal setting unit 121 of the database building unit 120 sets and stores a signal obtained by standardizing the signal in a stable state for each load cell as a reference signal, The standardization unit 122 of the image processing apparatus 120 processes the operation data and standardizes the image data to a size of 1 to 100.

In the energy balance analysis step S30, the alarm unit 131 of the analysis unit 130 notifies through the alarm when the difference between the reference signal and the standardized operation data is equal to or greater than the reference value. Also, the input / output energy analysis unit 132a of the energy balance analysis unit 132 calculates the heat amount of the boiler according to the amount of heat of the boiler, the enthalpy of the boiler outlet steam, Calculate the thermal equilibrium by comparing the calories, and at the same time calculate the mass balance by comparing the boiler inlet feed flow and the boiler outlet steam flow. In addition, the input energy balance analyzing unit 132b of the energy balance analyzing unit 132 calculates the equilibrium degree by calculating the three inputs of the boiler, that is, the feed water, the fuel and the air flow rate, as vectors each having a phase angle of 120 degrees.

In the energy balance display step S40, the display unit 140 displays the thermal balance and mass balance calculated in the input / output energy analysis unit 132a in the form of bar graphs 141 and 142, The flow rate of the water supply, the fuel, and the air may be arranged at an angle of 120 degrees from the circle through the center balance diagram 143. In addition, when one of the components is insufficient, the display unit 140 may bias the display point, which should be located at the center of the central balance degree 143, toward the direction of the insufficient component so that the operator can intuitively recognize the display point. do.

In the emergency driving operation guide step S50, the display unit 140 guides the operator through the emergency action notification window 144 to guide which of the fuel, the flow rate, and the water supply should be increased or decreased, .

It is to be understood that the present invention is not limited to the above-described embodiment, and that various modifications and changes may be made without departing from the scope of the present invention It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.

100; Energy imbalance real-time analyzer
110; A preprocessing unit 111; The signal-
112; A filtering unit 120; The database construction unit
121; A reference signal setting unit 122; Standardization section
130; An analysis unit 131; Alarm department
132; An energy balance analyzing unit 132a; Input / output energy analysis unit
132b; An input energy balance analyzing unit 140; Display portion
141; Thermal equilibrium bar graph 142; Mass-balance bar graph
143; A central balance degree 144; Emergency Action Announcement Window
145; System Status Window

Claims (9)

An energy imbalance real-time analyzing apparatus for monitoring an input / output energy flow rate of a system,
A preprocessing unit for obtaining operation data of the system;
A database building unit for standardizing operation data when the system is stable and setting the reference data as a reference signal and standardizing the operation data received by the preprocessing unit;
An analyzer for analyzing the standardized operation data on the basis of the reference signal and analyzing whether the operation data is balanced or not; And
And a display unit for displaying the standardized operation data as a vector and showing a central balance degree,
Wherein the analysis unit includes an input energy analysis unit for analyzing the balance by comparing the flow rates of water, fuel, and air among the operation data,
Wherein the display unit displays an equilateral triangle with respect to the flow rate of the water supply, fuel, and air, positions a display point of the reference signal at the center of the circumscribed circle of the equilateral triangle, and when at least one of the water supply, , The display point is moved in the direction of the insufficient component,
Wherein the display unit includes an emergency action notification window for guiding an increase or decrease of at least one of the water supply, fuel, and air. The method according to claim 1,
Wherein the analyzing unit includes an alarm unit for generating an alarm when the difference between the reference signal and the standardized operation data is equal to or greater than a reference value. The method according to claim 1,
Wherein the analyzing unit analyzes input / output energy analysis for analyzing at least one of a mass balance obtained by comparing the flow rates of water and steam among the operation data, and a thermal balance obtained by comparing heat input and steam output amounts of the operation data Energy imbalance real - time analysis device including part. The method of claim 3,
Wherein the display unit displays at least one of the mass balance and the thermal equilibrium as a bar graph. 5. The method of claim 4,
Wherein the display unit displays a stable region around an equilibrium point of the bar graph. delete delete delete delete

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