CN111624932A - Eight-input balance function block structure and method for thermal power generating unit - Google Patents
Eight-input balance function block structure and method for thermal power generating unit Download PDFInfo
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Abstract
The invention discloses an eight-input balance functional block structure and a method of a thermal power generating unit, wherein the eight-input balance functional block structure comprises an engineer station, an operator station, a switch, a controller, a first analog input terminal board, a first analog input clamping piece, a second analog input terminal board, a second analog input clamping piece, a switching value input terminal board, a switching value input clamping piece, an analog output terminal board, a switching value output clamping piece and a switching value output terminal board; the structure is clear and simple, up to eight parallel devices are supported to carry out balance operation, the switching between a transmission mode and a non-transmission mode is flexible, two working modes of normal and balance are supported in the non-transmission mode, and three value taking modes of a maximum value, a minimum value and a mean value are realized.
Description
Technical Field
The invention relates to the technical field of power plant control, in particular to a thermal power generating unit eight-input balance function block structure and a thermal power generating unit eight-input balance function block method.
Background
The power generation process of the thermal power generating unit comprises a large amount of total amount control and balance adjustment, such as various air quantities, fuel main control, primary air quantity, water supply quantity, coal feeding instructions and the like. The total amount control and balance regulation designs and installs a plurality of devices, in the process of controlling the juxtaposed devices, the output of each device and the manual-automatic state need to be considered, the total amount change and the switching and manual-automatic switching of each parallel device are processed in time, and various regulation parameters are set in a manual mode. The real-time performance and the balance of the total control directly determine whether the unit can operate efficiently and safely, for example, in the process of distributing the coal amount of each coal feeder according to the fuel main control of the thermal power unit, because a plurality of coal feeders are designed, the coal feeding instruction, the manual automatic state and the offset adjustment amount of each coal mill need to be taken into consideration in the control process. The generation of coal feeding instructions of each coal mill is completed through real-time accurate adjustment of the quantities, and the coal mills are supported to be freely switched between manual operation and automatic operation. Whether the operations are reasonable or not directly determines whether the thermal power generating unit can safely and stably operate and produce. The existing expansibility and flexibility of total amount balance control, manual and automatic switching and the like are not high, a supported operation interface cannot meet the requirement of actual unit operation, the operation interface is complex, potential limitation exists, and the requirement of total amount control and balance adjustment of the thermal power unit cannot be met. On the basis, an eight-input balance function block structure and a method are provided.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide an eight-input balancing function block structure and a method for a thermal power generating unit, wherein the structure is clear and simple, up to eight parallel devices are supported to perform balancing operation, the operation mode is flexibly switched between a transmission mode and a non-transmission mode, two working modes of normal operation and balancing operation are supported in the non-transmission mode, and three value taking modes of a maximum value, a minimum value and a mean value are provided.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a thermal power generating unit eight-input balance function block structure comprises an engineer station A, an operator station B, a switch C, a controller D, a first analog input end daughter board E, a first analog input clamping piece F, a second analog input terminal board G, a second analog input clamping piece H, a switching value input end daughter board I, a switching value input clamping piece J, an analog output clamping piece K, an analog output end daughter board L, a switching value output clamping piece M and a switching value output end daughter board N;
the engineer station A, the operator station B and the controller D are respectively connected with the switch C through Ethernet cables; the analog quantity input card piece comprises a first analog quantity input card piece F, a second analog quantity input card piece H, a switching quantity input card piece J, an analog quantity output card piece K, a switching quantity output card piece M and a controller D, wherein the switching quantity output card piece M is connected with the controller D through a shared IO bus, a first analog quantity input terminal board E and the first analog quantity input card piece F, a second analog quantity input terminal board G and the second analog quantity input card piece H, a switching quantity input terminal board I and the switching quantity input card piece J, an analog quantity output terminal board L and the analog quantity output card piece K, and a switching quantity output terminal board N and the switching quantity output card piece M are connected through cables.
The first analog quantity input terminal board E and the second analog quantity input terminal board G comprise 8 input channels, each input channel adopts a two-wire analog quantity signal access mode and comprises two binding posts, one is a positive binding post, and the other is a negative binding post; the analog input AI is accessed to a first input channel of the first analog input terminal board E, and the 8 paths of input tracking signals are respectively accessed to 8 input channels of the second analog input terminal board G.
The analog quantity output terminal board L comprises 8 analog quantity output channels, and each output channel externally provides two-wire analog quantity signal output; the analog output AO is connected to a first output channel of the analog output terminal board L.
The switching value input terminal board I comprises 8 switching value input channels, and each channel adopts a two-wire wiring mode to provide two wiring terminals; the 8 paths of input tracking switch signals are respectively connected into 8 input channels of the switching value input terminal daughter board I.
The switching value output terminal board N comprises 8 switching value output channels, and each channel adopts a two-wire wiring mode to provide two wiring terminals; the switching value output DO is connected to a first output channel of the switching value output terminal board N.
The shared IO bus adopts a CAN bus.
The working method of the thermal power generating unit eight-input balance function block structure specifically comprises the following steps:
in each operation period, the first analog input terminal board E collects analog input AI and sends the AI to the controller D through the first analog input clamping piece F; the second analog quantity input terminal board G collects 8 paths of input tracking signals and sends the signals to the controller D through the second analog quantity input clamping piece H; the switching value input terminal board I collects 8 paths of input tracking switch signals and sends the signals to the controller D through the switching value input clamping piece J, and the controller D respectively sends the analog output AO and the switching value output DO to the analog output clamping piece K and the switching value output clamping piece M after completing operation according to an eight-input balance function block operation method; the analog quantity output card K converts the analog quantity output AO into a current signal of 4-20mA and sends the current signal to the analog quantity output terminal board L; the switching value output clamping piece M sends the switching value output DO to the switching value output terminal board N, and the analog value output terminal board L and the switching value output terminal board N output the received signals to a control object;
an engineer sets an operation period of the eight-input balance function block through the engineer station A, and after the setting is completed, the eight-input balance function block executes operation according to the set period;
the eight-input balance function block operation method specifically comprises the following steps: the engineer station A has two functions of controlling configuration and monitoring pictures, and the operator station B only has one function of monitoring pictures; the control configuration provides a debug panel of eight-input balanced functional blocks through which the analog output AO and the switching output DO are forced. The debugging panel completes the forcing in the following way, the debugging panel sends a forcing instruction to the controller D through the switch C, the forcing instruction comprises forcing information of analog quantity output AO and switching quantity output DO, the controller D analyzes the forcing information and stores the forcing information into an output forcing array Status, and if the analog quantity output AO is forced, the Status [0] is 1; if the forced switching value outputs DO, Status [1] is 1; if the forced analog quantity output AO is cancelled, Status [0] is equal to 0; if the forced switching value output DO is cancelled, Status [1] is equal to 0; the method comprises the steps that an operation panel of an eight-input balance function block is provided for a monitoring picture, the operation panel is provided with a working mode and a value taking mode of the eight-input balance function block, the set working mode and the value taking mode are respectively stored in a working mode WorkMode and a value taking mode OutSelect, the value taking mode is selected among a maximum value, a minimum value and an average value, and the working mode is switched between a normal working mode and a balance working mode;
the input of the eight-input balance function block comprises an analog input AI; inputting tracking signals by 8 paths, and recording the tracking signals as TRi, wherein the value of i is between 1 and 8, namely a 1 st path input tracking signal TR1 and a 2 nd path input tracking signal TR2, and sequentially inputting a 8 th path input tracking signal TR 8; inputting tracking switch signals by 8 paths, recording the tracking switch signals as STRI, wherein the value of i is between 1 and 8, namely a 1 st path input tracking switch signal STR1 and a 2 nd path input tracking switch signal STR2, and sequentially inputting tracking switch signals STR8 by an 8 th path;
the input tracking switch signal reflects the control mode of the input tracking signal, if the input tracking switch signal takes a value of 0, the corresponding input tracking signal is represented as an automatic signal, and if the input tracking switch signal takes a value of 1, the corresponding input tracking signal is represented as a manual signal;
8 input tracking signals and 8 input tracking switch signals form 8 pairs of input signal groups, the 8 pairs of input signal groups are respectively a 1 st input tracking signal TR1 and a 1 st input tracking switch signal STR1, which are recorded as (TR1, STR1), sequentially the ith input tracking signal TRi and the ith input tracking switch signal STRi are recorded as (TRi, STRi) until the 8 th input tracking signal TR8 and the 8 th input tracking switch signal STR8 are recorded as (TR8, STR 8);
the output parameters of the eight-input balance function block comprise analog quantity output AO and switching value output DO;
the intermediate parameters of the eight-input balance function block comprise an output upper limit Outhigh, an output lower limit OutLow, a value-taking mode OutSelect, a working mode WorkMode, a Quality transfer QualityPass, a function block Quality Quality, an output forced array Status, an effective input signal group number grp1, a total input automatic input tracking switch number sch1, a manual input tracking signal group ManOut, an intermediate analog quantity output Aout and an intermediate switching quantity output Dout; the length of an output forced array is 2, the output forced array comprises 2 data items, the first data item is marked as Status [0], and the second data item is marked as Status [1 ]; status [0] indicates whether analog output AO is forced, Status [1] indicates whether switching output DO is forced;
a valid input signal group number grp1 representing the total number of valid input signal groups in the 8 input signal groups, the valid input signal group being valid only when the input tracking signals of the input signal group and the input tracking switches are simultaneously connected to valid inputs, otherwise, the invalid input signal group being an invalid input signal group; the total number of put-in automatic tracking switches sch1 represents the total number of put-in automatic tracking switches of the 8-way input tracking switch; the manual input tracking signal group ManOut is a data item set and records the input tracking signal values of all manual modes, and the total number of data items of the ManOut is the total number of input tracking signals in the manual modes;
the calculation method of each operation period is as follows:
firstly, performing quality calculation of an eight-input balancing function block, wherein the eight-input balancing function block has two quality states, namely good quality and bad quality; when the Quality is equal to 1, the eight-input balancing function block works in a bad Quality state, and when the Quality is equal to 0, the eight-input balancing function block works in a good Quality state; the quality transfer flag QualityPass indicates whether the eight-input balancing function block receives the quality transfer, and the eight-input balancing function block quality calculation method is as follows:
when QualityPass is 1, the eight-input balancing function block receives the quality status from the input, i.e., the quality of the eight-input balancing function block is calculated according to the following formula:
quality AIQ | | TR1Q | | TR2Q | | TR3Q | TR4Q | | TR5Q | | TR6Q | | TR7Q | | TR8Q | | STR1Q | STR2Q | | STR3Q | | STR4Q | | STR5Q | | | STR6Q | STR7Q | STR8Q, where | | | represents logic or operation;
when the QualityPass is 0, the eight-input balancing function block does not accept the Quality from the input, namely the Quality is 0, and the Quality of the eight-input balancing function block is good Quality;
after the quality calculation is completed, calculating the number grp1 of effective input signal groups according to the following method: sequentially judging whether the input tracking signals and the input tracking switch signals in the 8 input signal groups are connected with effective input signals, if the effective input signals are connected at the same time, executing grp 1-grp 1+1 operation, and judging each input tracking switch according to the following modes:
when STRi ═ 0, sch1 ═ sch1+ 1;
when the STRI is 1, recording the input tracking signal value of the corresponding path into ManOut;
wherein, STRI represents the value of the ith path input tracking switch signal, and the value range of i is 1 to 8;
grp1-sch1 represents the total number of input tracking signals operating in manual mode. After the calculation is completed, the length of the data items of the manual input tracking signal group ManOut is grp1-sch1, and the values of grp1-sch1 input tracking signals working in a manual mode are recorded;
next, judging and judging the total number of the valid input signal groups:
when there is no valid set of input signals, i.e., grp1 equals 0, the eight-input balancing block switches to pass mode, Aout equals AI, and Dout equals 0;
when a valid input signal group exists, namely grp1 is greater than 0, the eight-input balance function block is switched to a non-transmission mode, and the total number of the input automatic input tracking switches sch1 is judged;
(1) when sch1>0 indicates that K automatic signals are totally contained in the 8 input tracking signals, Dout is equal to 0, indicating that at least one of the 8 input tracking signals operates in an automatic mode. Under the condition, the eight-input balance function block supports two working modes, namely a normal working mode and a balance working mode, the working mode of the eight-input balance function block is set at the engineer station A, and the eight-input balance function block adopts different calculation methods according to the set working mode:
when the eight-input balance function block works in a normal working mode, Aout is AI;
when the eight-input balance function block works in a balance working mode, the Aout is (grp1 × AI- Σ ManOut)/sch 1;
wherein Σ ManOut represents the sum of all data items in ManOut;
(2) when all input tracking signals are manual signals, namely sch1 is equal to 0, which means that all effective input tracking switches are 1, then Dout is equal to 1, under the condition, the eight-input balancing function block supports three value-taking modes, namely a maximum value mode, an average value mode and a minimum value mode, and different calculation methods are adopted according to different set working modes:
when the eight-input balancing function block operates in the maximum mode: aout ═ Max { TRi };
when the eight input balance function operates in the mean mode: aout ═ Avr { TRi };
when the eight-input balance function block works in the minimum mode: aout ═ Min { TRi };
wherein i represents the serial number of the 8-path input tracking signals, the value range is 1 to 8, Max { TRi } represents the maximum value of all effective input tracking signals, Avr { TRi } represents the average value of all effective input tracking signals, and Min { TRi } represents the minimum value of all effective input tracking signals;
and finally, calculating the upper limit and the lower limit of the analog quantity output range and performing forced output verification:
analog quantity output range:
when Aout > OutHigh, Aout is equal to OutHigh;
when Aout is less than OutLow, then Aout is OutLow;
forced output verification:
when Status [0] is not equal to 1, AO is Aout;
when Status [1] ≠ 1, DO ═ Dout.
Compared with the prior art, the invention has the following advantages:
1. the balance operation of up to 8 channels of equipment is supported, and the eight-input balance function block can flexibly judge the manual and automatic states of the parallel equipment and adjust the total balance.
2. The eight-input balance function block can be automatically switched between a transfer mode and a non-transfer mode; under the non-transfer mode, two working modes and a plurality of value taking modes are supported, the working modes comprise a normal mode and a balance mode, and the value taking modes can be freely switched among a maximum value, a minimum value and a mean value.
3. The eight input balance block detects the input signals and outputs manual when all input signals are active in the manual state.
4. The analog output of the eight-input balance function block is restricted by upper and lower limits, so that the large-range fluctuation of the analog output is avoided, and the safe and stable operation of the unit is ensured.
Drawings
FIG. 1 is a diagram of an eight input balance function block assembly and connection architecture;
FIG. 2 is a diagram of an eight input balanced functional block logic model;
FIG. 3 is an application diagram of an eight input balancing function block;
Detailed Description
The invention is described in further detail below with reference to the drawings and examples of application in engineering.
As shown in fig. 1, an eight-input balance function block structure of a thermal power generating unit comprises an engineer station a, an operator station B, a switch C, a controller D, a first analog input sub-board E, a first analog input clamping piece F, a second analog input terminal board G, a second analog input clamping piece H, a switching value input sub-board I, a switching value input clamping piece J, an analog output clamping piece K, an analog output sub-board L, a switching value output clamping piece M and a switching value output sub-board N.
The engineer station A, the operator station B and the controller D are respectively connected with the switch C through Ethernet cables; the first analog input clamping piece F, the second analog input clamping piece H, the switching value input clamping piece J, the analog output clamping piece K, the switching value output clamping piece M and the controller D are connected through a shared IO bus, and the shared IO bus adopts a CAN bus. The first analog input terminal board E and the first analog input clamping piece F, the second analog input terminal board G and the second analog input clamping piece H, the switching value input terminal board I and the switching value input clamping piece J, the analog output terminal board L and the analog output clamping piece K, and the switching value output terminal board N and the switching value output clamping piece M are connected through standard cables of DB37 type.
The first analog quantity input terminal board E and the second analog quantity input terminal board G comprise 8 input channels, each input channel adopts a two-wire analog quantity signal access mode of 4-20mA, and comprises two binding posts, one is a positive binding post, and the other is a negative binding post; the analog input AI is connected to the first input channel of the first analog input sub-board E, and the 8-way input tracking signals TR1, TR2, TR3, TR4, TR5, TR6, TR7 and TR8 are respectively connected to the 8 input channels of the second analog input sub-board G.
The analog quantity output terminal board L comprises 8 analog quantity output channels, and each output channel provides 4-20mA two-wire analog quantity signal output for the outside; the analog output AO is connected to a first output channel of the analog output terminal board L.
The switching value input terminal board I comprises 8 switching value input channels, and each channel adopts a two-wire wiring mode to provide two wiring terminals; the 8 input tracking switch signals STR1, STR2, STR3, STR4, STR5, STR6, STR7 and STR8 are respectively connected to 8 input channels of the switching value input terminal board I.
The switching value output terminal board N comprises 8 switching value output channels, and each channel adopts a two-wire wiring mode to provide two wiring terminals; the switching value output DO is connected to a first output channel of the switching value output terminal board N.
The shared IO bus adopts a CAN bus.
The working method of the thermal power generating unit eight-input balance function block structure specifically comprises the following steps:
in each operation period, the first analog input terminal board E collects analog input AI and sends the AI to the controller D through the first analog input clamping piece F; the second analog quantity input terminal board G collects 8 paths of input tracking signals TR1, TR2, TR3, TR4, TR5, TR6, TR7 and TR8, and sends the signals to the controller D through a second analog quantity input card H; the switching value input terminal board I acquires 8 paths of input tracking switch signals STR1, STR2, STR3, STR4, STR5, STR6, STR7 and STR8, and sends the signals to the controller D through the switching value input clamping piece J, and the controller D respectively sends analog output AO and switching value output DO to an analog output clamping piece K and a switching value output clamping piece M after completing operation according to an eight-input balance function block operation method; the analog quantity output card K converts the analog quantity output AO into a current signal of 4-20mA and sends the current signal to the analog quantity output terminal board L; the switching value output clamping piece M sends the switching value output DO to the switching value output terminal board N, and the analog value output terminal board L and the switching value output terminal board N output the received signals to a control object.
The engineer sets the operation period of the eight-input balance function block through the engineer station a, and after the setting is completed, the eight-input balance function block executes the operation according to the set period.
The eight-input balance function block operation method specifically comprises the following steps: the engineer station A has two functions of controlling configuration and monitoring pictures, and the operator station B has only one function of monitoring pictures. The control configuration provides a debug panel of eight-input balanced functional blocks through which analog output AO and switching output DO can be forced. The debugging panel completes the forcing in the following way, the debugging panel sends a forcing instruction to the controller D through the switch C, the forcing instruction comprises forcing information of analog quantity output AO and switching quantity output DO, the controller D analyzes the forcing information and stores the forcing information into an output forcing array Status, and if the analog quantity output AO is forced, the Status [0] is 1; if the forced switching value outputs DO, Status [1] is 1; if the forced analog quantity output AO is cancelled, Status [0] is equal to 0; if the forced switching output DO is canceled, Status [1] becomes 0. The monitoring picture provides an operation panel of the eight-input balance function block, and the operation panel can flexibly set the working mode and the value taking mode of the eight-input balance function block. The set working mode and the value taking mode are respectively stored in a working mode WorkMode and a value taking mode OutSelect, the value taking mode can be selected among a maximum value, a minimum value and an average value, and the working mode can be switched between a normal working mode and a balanced working mode.
Logic model of the eight input balance function block as shown in fig. 2, the inputs of the eight input balance function block include analog inputs AI; inputting tracking signals by 8 paths, and recording the tracking signals as TRi, wherein the value of i is between 1 and 8, namely a 1 st path input tracking signal TR1 and a 2 nd path input tracking signal TR2, and sequentially inputting a 8 th path input tracking signal TR 8; the tracking switch signal is input into 8 paths, which are denoted as STRI, wherein the value of i is between 1 and 8, which are respectively the 1 st path input tracking switch signal STR1 and the 2 nd path input tracking switch signal STR2, and the 8 th path input tracking switch signal STR 8.
The input tracking switch signal reflects the control mode of the input tracking signal, if the input tracking switch signal takes a value of 0, the corresponding input tracking signal is represented as an automatic signal, and if the input tracking switch signal takes a value of 1, the corresponding input tracking signal is represented as a manual signal.
The 8 input tracking signals and the 8 input tracking switch signals form 8 pairs of input signal groups, the 8 pairs of input signal groups are respectively a 1 st input tracking signal TR1 and a 1 st input tracking switch signal STR1, which are recorded as (TR1, STR1), and the ith input tracking signal TRi and the ith input tracking switch signal STRi are recorded as (TRi, STRi) in sequence until the 8 th input tracking signal TR8 and the 8 th input tracking switch signal STR8 are recorded as (TR8, STR 8).
The output parameters of the eight-input balancing function block include an analog output AO and a switching output DO.
The intermediate parameters of the eight-input balance function block comprise an output upper limit Outhigh, an output lower limit OutLow, a value-taking mode OutSelect, a working mode WorkMode, a Quality transfer QualityPass, a function block Quality Quality, an output forced array Status, an effective input signal group number grp1, a total input automatic input tracking switch number sch1, a manual input tracking signal group ManOut, an intermediate analog quantity output Aout and an intermediate switching quantity output Dout; the length of an output forced array is 2, the output forced array comprises 2 data items, the first data item is marked as Status [0], and the second data item is marked as Status [1 ]; status [0] indicates whether the analog output AO is forced, and Status [1] indicates whether the switching output DO is forced.
The number of valid input signal groups grp1, which represents the total number of valid input signal groups in the 8 input signal groups, is valid only if the input tracking signals of the input signal group and the input tracking switches are simultaneously connected to valid inputs, and is otherwise invalid. The total number of put-in automatic tracking switches sch1 represents the total number of put-in automatic tracking switches of the 8-way input tracking switch. The manual input trace signal group ManOut is a data item set, records the input trace signal values of all manual modes, and the total number of data items of ManOut is the total number of input trace signals in the manual mode.
The calculation method of each operation period is as follows:
firstly, performing quality calculation of an eight-input balancing function block, wherein the eight-input balancing function block has two quality states, namely good quality and bad quality; when the Quality is equal to 1, the eight-input balancing function block operates in a bad Quality state, and when the Quality is equal to 0, the eight-input balancing function block operates in a good Quality state. The quality transfer flag QualityPass indicates whether the eight-input balancing function block receives the quality transfer, and the eight-input balancing function block quality calculation method is as follows:
when QualityPass is 1, the eight-input balancing function block receives the quality status from the input, i.e., the quality of the eight-input balancing function block is calculated according to the following formula:
quality is AIQ | | TR1Q | | TR2Q | | TR3Q | TR4Q | | TR5Q | | TR6Q | | TR7Q | | TR8Q | | STR1Q | STR2Q | | | STR3Q | | STR4Q | | STR5Q | | | STR6Q | | STR7Q | STR8Q, where | | | represents logic or operation.
When QualityPass is 0, the eight-input balancing function block does not accept the Quality from the input, i.e., Quality is 0, and the Quality of the eight-input balancing function block is good Quality.
After the quality calculation is completed, calculating the number grp1 of effective input signal groups according to the following method: sequentially judging whether the input tracking signals and the input tracking switch signals in the 8 input signal groups are connected with effective input signals, if the effective input signals are connected at the same time, executing grp 1-grp 1+1 operation, and judging each input tracking switch according to the following modes:
when STRi ═ 0, sch1 ═ sch1+ 1;
when the STRI is 1, recording the input tracking signal value of the corresponding path into ManOut;
wherein, STRI represents the value of the ith path input tracking switch signal, and the value range of i is 1 to 8;
grp1-sch1 represents the total number of input tracking signals operating in manual mode. The length of the data items of the manual input trace signal group ManOut after the calculation is completed is grp1-sch1, and the values of grp1-sch1 input trace signals operating in the manual mode are recorded.
Next, judging and judging the total number of the valid input signal groups:
when there is no valid set of input signals, i.e., grp1 equals 0, the eight-input balancing block switches to pass mode, Aout equals AI, and Dout equals 0;
when there is a valid set of input signals, i.e., grp1>0, the eight-input balance function switches to the non-transfer mode, determines the total number of engaged automatic input tracking switches sch1,
(1) when sch1>0 indicates that K automatic signals are totally contained in the 8 input tracking signals, Dout is equal to 0, indicating that at least one of the 8 input tracking signals operates in an automatic mode. Under the condition, the eight-input balance function block supports two working modes, namely a normal working mode and a balance working mode, the working mode of the eight-input balance function block can be set at an engineer station A, and the eight-input balance function block adopts different calculation methods according to the set working mode:
when the eight-input balance function block works in a normal working mode, Aout is AI;
when the eight-input balance function block works in a balance working mode, the Aout is (grp1 × AI- Σ ManOut)/sch 1;
where Σ ManOut denotes the sum of all data items in ManOut.
(2) When all input tracking signals are manual signals, namely sch1 is equal to 0, which means that all effective input tracking switches are 1, then Dout is equal to 1, under the condition, the eight-input balancing function block supports three value-taking modes, namely a maximum value mode, an average value mode and a minimum value mode, and different calculation methods are adopted according to different set working modes:
when the eight-input balancing function block operates in the maximum mode: aout ═ Max { TRi };
when the eight input balance function operates in the mean mode: aout ═ Avr { TRi };
when the eight-input balance function block works in the minimum mode: aout ═ Min { TRi };
wherein i represents the serial number of the 8 input tracking signals, the value range is 1 to 8, Max { TRi } represents the maximum value of all effective input tracking signals, Avr { TRi } represents the average value of all effective input tracking signals, and Min { TRi } represents the minimum value of all effective input tracking signals.
And finally, calculating the upper limit and the lower limit of the analog quantity output range and performing forced output verification:
analog quantity output range:
when Aout > OutHigh, Aout is equal to OutHigh;
when Aout is less than OutLow, then Aout is OutLow;
forced output verification:
when Status [0] is not equal to 1, AO is Aout;
when Status [1] ≠ 1, DO ═ Dout.
As shown in fig. 3, the application diagram of the eight-input balance function block is shown, in which the eight-input balance function block is numbered as 390-1, the 6 coal mill commands include a coal mill a command, a coal mill B command, a coal mill C command, a coal mill D command, a coal mill E command and a coal mill F command, which are respectively connected to the 6 input tracking signals, the 6 coal mill manual commands include a coal mill a manual command, a coal mill B manual command, a coal mill C manual command, a coal mill D manual command, a coal mill E manual command and a coal mill F manual command, which are respectively connected to the 6 input tracking switches, and the output analog quantity AO is connected to the coal mill command. The figure illustrates the application of the eight input balancing function block to the coal feeder control. The method comprises the steps of controlling the rotating speed of a coal feeder according to an output instruction of a fuel main control unit, meeting the coal feeding requirement of a coal pulverizing system, outputting the fuel main control unit to be a total instruction of each coal feeder, enabling the control logics of the coal feeder A, the coal feeder B, the coal feeder C, the coal feeder D, the coal feeder E and the coal feeder F to be the same, taking the coal feeder A as an example, designing a coal feeding bias function, superposing the bias amount of the coal feeder on the total instruction, and finally obtaining an automatic coal feeding instruction of the coal feeder, namely a coal pulverizer instruction.
Claims (7)
1. The utility model provides a thermal power unit eight inputs balanced function block structure which characterized in that: the system comprises an engineer station (A), an operator station (B), a switch (C), a controller (D), a first analog input terminal board (E), a first analog input clamping piece (F), a second analog input terminal board (G), a second analog input clamping piece (H), a switching value input terminal board (I), a switching value input clamping piece (J), an analog output clamping piece (K), an analog output terminal board (L), a switching value output clamping piece (M) and a switching value output terminal board (N);
the engineer station (A), the operator station (B) and the controller (D) are respectively connected with the switch (C) through Ethernet lines; the device comprises a first analog quantity input clamping piece (F), a second analog quantity input clamping piece (H), a switching quantity input clamping piece (J), an analog quantity output clamping piece (K), a switching quantity output clamping piece (M) and a controller (D) which are connected through a shared IO bus, wherein the first analog quantity input terminal board (E) is connected with the first analog quantity input clamping piece (F), the second analog quantity input terminal board (G) is connected with the second analog quantity input clamping piece (H), the switching quantity input terminal board (I) is connected with the switching quantity input clamping piece (J), the analog quantity output terminal board (L) is connected with the analog quantity output clamping piece (K), and the switching quantity output terminal board (N) is connected with the switching quantity output clamping piece (M) through cables.
2. The thermal power generating unit eight-input balance function block structure according to claim 1, characterized in that: the first analog quantity input terminal board (E) and the second analog quantity input terminal board (G) comprise 8 input channels, each input channel adopts a two-wire analog quantity signal access mode and comprises two binding posts, one is a positive binding post and the other is a negative binding post; the analog input AI is connected to the first input channel of the first analog input terminal board (E), and the 8-path input tracking signals are respectively connected to the 8 input channels of the second analog input terminal board (G).
3. The thermal power generating unit eight-input balance function block structure according to claim 1, characterized in that: the analog quantity output terminal board (L) comprises 8 analog quantity output channels, and each output channel externally provides two-wire analog quantity signal output; the analog output AO is connected to a first output channel of an analog output terminal block (L).
4. The thermal power generating unit eight-input balance function block structure according to claim 1, characterized in that: the switching value input terminal board (I) comprises 8 switching value input channels, and each channel adopts a two-wire wiring mode to provide two wiring terminals; the 8 input tracking switch signals are respectively connected into 8 input channels of the switching value input terminal board (I).
5. The thermal power generating unit eight-input balance function block structure according to claim 1, characterized in that: the switching value output terminal board (N) comprises 8 switching value output channels, and each channel adopts a two-wire wiring mode to provide two wiring terminals; the switching output DO is connected to a first output channel of a switching output terminal block (N).
6. The thermal power generating unit eight-input balance function block structure according to claim 1, characterized in that: the shared IO bus adopts a CAN bus.
7. The operating method of the thermal power generating unit eight-input balance function block structure according to any one of claims 1 to 6, characterized in that: the method comprises the following specific steps:
in each operation period, the first analog input terminal board (E) collects analog input AI and sends the analog input AI to the controller (D) through the first analog input clamping piece (F); the second analog input terminal board (G) collects 8 paths of input tracking signals and sends the signals to the controller (D) through the second analog input clamping piece (H); the switching value input terminal board (I) collects 8 paths of input tracking switch signals and sends the signals to the controller (D) through the switching value input clamping piece (J), and the controller (D) executes and finishes operation according to an eight-input balance function block operation method and then sends analog output AO and switching value output DO to the analog output clamping piece (K) and the switching value output clamping piece (M) respectively; the analog quantity output card (K) converts the analog quantity output AO into a current signal of 4-20mA and sends the current signal to the analog quantity output terminal board (L); the switching value output clamping piece (M) sends the switching value output DO to a switching value output terminal board (N), and the analog value output terminal board (L) and the switching value output terminal board (N) output received signals to a control object;
an engineer sets an operation period of the eight-input balance function block through an engineer station (A), and after the setting is finished, the eight-input balance function block executes operation according to the set period;
the eight-input balance function block operation method specifically comprises the following steps: the engineer station (A) has two functions of controlling configuration and monitoring pictures, and the operator station (B) only has one function of monitoring pictures; the control configuration provides a debugging panel of an eight-input balance function block, and the analog quantity output AO and the switching value output DO are forced through the debugging panel; the debugging panel completes the forcing in a mode that the debugging panel sends a forcing instruction to a controller (D) through a switch (C), the forcing instruction comprises forcing information of an analog quantity output AO and a switching quantity output DO, the controller (D) analyzes the forcing information and stores the forcing information into an output forcing array Status, and if the analog quantity output AO is forced, Status [0] is 1; if the forced switching value outputs DO, Status [1] is 1; if the forced analog quantity output AO is cancelled, Status [0] is equal to 0; if the forced switching value output DO is cancelled, Status [1] is equal to 0; the method comprises the steps that an operation panel of an eight-input balance function block is provided for a monitoring picture, the operation panel is provided with a working mode and a value taking mode of the eight-input balance function block, the set working mode and the value taking mode are respectively stored in a working mode WorkMode and a value taking mode OutSelect, the value taking mode is selected among a maximum value, a minimum value and an average value, and the working mode is switched between a normal working mode and a balance working mode;
the input of the eight-input balance function block comprises an analog input AI; inputting tracking signals by 8 paths, and recording the tracking signals as TRi, wherein the value of i is between 1 and 8, namely a 1 st path input tracking signal TR1 and a 2 nd path input tracking signal TR2, and sequentially inputting a 8 th path input tracking signal TR 8; inputting tracking switch signals by 8 paths, recording the tracking switch signals as STRI, wherein the value of i is between 1 and 8, namely a 1 st path input tracking switch signal STR1 and a 2 nd path input tracking switch signal STR2, and sequentially inputting tracking switch signals STR8 by an 8 th path;
the input tracking switch signal reflects the control mode of the input tracking signal, if the input tracking switch signal takes a value of 0, the corresponding input tracking signal is represented as an automatic signal, and if the input tracking switch signal takes a value of 1, the corresponding input tracking signal is represented as a manual signal;
8 input tracking signals and 8 input tracking switch signals form 8 pairs of input signal groups, the 8 pairs of input signal groups are respectively a 1 st input tracking signal TR1 and a 1 st input tracking switch signal STR1, which are recorded as (TR1, STR1), sequentially the ith input tracking signal TRi and the ith input tracking switch signal STRi are recorded as (TRi, STRi) until the 8 th input tracking signal TR8 and the 8 th input tracking switch signal STR8 are recorded as (TR8, STR 8);
the output parameters of the eight-input balance function block comprise analog quantity output AO and switching value output DO;
the intermediate parameters of the eight-input balance function block comprise an output upper limit Outhigh, an output lower limit OutLow, a value-taking mode OutSelect, a working mode WorkMode, a Quality transfer QualityPass, a function block Quality Quality, an output forced array Status, an effective input signal group number grp1, a total input automatic input tracking switch number sch1, a manual input tracking signal group ManOut, an intermediate analog quantity output Aout and an intermediate switching quantity output Dout; the length of an output forced array is 2, the output forced array comprises 2 data items, the first data item is marked as Status [0], and the second data item is marked as Status [1 ]; status [0] indicates whether analog output AO is forced, Status [1] indicates whether switching output DO is forced;
a valid input signal group number grp1 representing the total number of valid input signal groups in the 8 input signal groups, the valid input signal group being valid only when the input tracking signals of the input signal group and the input tracking switches are simultaneously connected to valid inputs, otherwise, the invalid input signal group being an invalid input signal group; the total number of put-in automatic tracking switches sch1 represents the total number of put-in automatic tracking switches of the 8-way input tracking switch; the manual input tracking signal group ManOut is a data item set and records the input tracking signal values of all manual modes, and the total number of data items of the ManOut is the total number of input tracking signals in the manual modes;
the calculation method of each operation period is as follows:
firstly, performing quality calculation of an eight-input balancing function block, wherein the eight-input balancing function block has two quality states, namely good quality and bad quality; when the Quality is equal to 1, the eight-input balancing function block works in a bad Quality state, and when the Quality is equal to 0, the eight-input balancing function block works in a good Quality state; the quality transfer flag QualityPass indicates whether the eight-input balancing function block receives the quality transfer, and the eight-input balancing function block quality calculation method is as follows:
when QualityPass is 1, the eight-input balancing function block receives the quality status from the input, i.e., the quality of the eight-input balancing function block is calculated according to the following formula:
quality AIQ | | TR1Q | | TR2Q | | TR3Q | TR4Q | | TR5Q | | TR6Q | | TR7Q | | TR8Q | | STR1Q | STR2Q | | STR3Q | | STR4Q | | STR5Q | | | STR6Q | STR7Q | STR8Q, where | | | represents logic or operation;
when the QualityPass is 0, the eight-input balancing function block does not accept the Quality from the input, namely the Quality is 0, and the Quality of the eight-input balancing function block is good Quality;
after the quality calculation is completed, calculating the number grp1 of effective input signal groups according to the following method: sequentially judging whether the input tracking signals and the input tracking switch signals in the 8 input signal groups are connected with effective input signals, if the effective input signals are connected at the same time, executing grp 1-grp 1+1 operation, and judging each input tracking switch according to the following modes:
when STRi ═ 0, sch1 ═ sch1+ 1;
when the STRI is 1, recording the input tracking signal value of the corresponding path into ManOut;
wherein, STRI represents the value of the ith path input tracking switch signal, and the value range of i is 1 to 8;
grp1-sch1 represents the total number of input tracking signals operating in manual mode. After the calculation is completed, the length of the data items of the manual input tracking signal group ManOut is grp1-sch1, and the values of grp1-sch1 input tracking signals working in a manual mode are recorded;
next, judging and judging the total number of the valid input signal groups:
when there is no valid set of input signals, i.e., grp1 equals 0, the eight-input balancing block switches to pass mode, Aout equals AI, and Dout equals 0;
when a valid input signal group exists, namely grp1 is greater than 0, the eight-input balance function block is switched to a non-transmission mode, and the total number of the input automatic input tracking switches sch1 is judged;
(1) when sch1>0 indicates that K automatic signals are totally contained in the 8 input tracking signals, Dout is equal to 0, indicating that at least one of the 8 input tracking signals operates in an automatic mode. Under the condition, the eight-input balance function block supports two working modes, namely a normal working mode and a balance working mode, the working mode of the eight-input balance function block is set at the engineer station A, and the eight-input balance function block adopts different calculation methods according to the set working mode:
when the eight-input balance function block works in a normal working mode, Aout is AI;
when the eight-input balance function block works in a balance working mode, the Aout is (grp1 × AI- Σ ManOut)/sch 1;
wherein Σ ManOut represents the sum of all data items in ManOut;
(2) when all input tracking signals are manual signals, namely sch1 is equal to 0, which means that all effective input tracking switches are 1, then Dout is equal to 1, under the condition, the eight-input balancing function block supports three value-taking modes, namely a maximum value mode, an average value mode and a minimum value mode, and different calculation methods are adopted according to different set working modes:
when the eight-input balancing function block operates in the maximum mode: aout ═ Max { TRi };
when the eight input balance function operates in the mean mode: aout ═ Avr { TRi };
when the eight-input balance function block works in the minimum mode: aout ═ Min { TRi };
wherein i represents the serial number of the 8-path input tracking signals, the value range is 1 to 8, Max { TRi } represents the maximum value of all effective input tracking signals, Avr { TRi } represents the average value of all effective input tracking signals, and Min { TRi } represents the minimum value of all effective input tracking signals;
and finally, calculating the upper limit and the lower limit of the analog quantity output range and performing forced output verification:
analog quantity output range:
when Aout > OutHigh, Aout is equal to OutHigh;
when Aout is less than OutLow, then Aout is OutLow;
forced output verification:
when Status [0] is not equal to 1, AO is Aout;
when Status [1] ≠ 1, DO ═ Dout.
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| CN115167187A (en) * | 2022-08-18 | 2022-10-11 | 西安热工研究院有限公司 | Automatic coal feeder control system suitable for deep peak regulation working condition of coal electric machine set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115167187A (en) * | 2022-08-18 | 2022-10-11 | 西安热工研究院有限公司 | Automatic coal feeder control system suitable for deep peak regulation working condition of coal electric machine set |
| CN115167187B (en) * | 2022-08-18 | 2023-07-25 | 西安热工研究院有限公司 | Automatic control system of coal feeder suitable for deep peak-shaving working condition of coal motor unit |
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