CN113467535B - Control system and method for circulating water pump for thermal power - Google Patents
Control system and method for circulating water pump for thermal power Download PDFInfo
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- CN113467535B CN113467535B CN202110202509.4A CN202110202509A CN113467535B CN 113467535 B CN113467535 B CN 113467535B CN 202110202509 A CN202110202509 A CN 202110202509A CN 113467535 B CN113467535 B CN 113467535B
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- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
A control system and a method thereof for a circulating water pump of thermal power comprise: the method for the central processing unit to transfer the collected data to the background in the WLAN comprises the following procedures running on the central processing unit: a-1: performing bandwidth varying treatment on each sub-data packet of acquired data to be transmitted in parallel on a plurality of sub-channels respectively so as to vary the bandwidth to a corresponding sub-channel to be selected with a preset bandwidth range; the defect that a central processing unit of the operation control device of the circulating water pump of the thermoelectric generator set in the prior art needs a small channel bandwidth range when transmitting acquired data to a background through a WLAN channel and the acquired data are not easily transmitted with a continuous frequency is effectively overcome.
Description
Technical Field
The embodiment of the invention relates to the technical field of control of circulating water pumps, in particular to a circulating water pump control system and method for thermal power.
Background
Thermal power generation (thermal power generation) is a power generation method in which thermal energy generated by combustion of combustible materials is converted into electric energy by a power generation power device. China is rich in coal resources, 10.9 hundred million tons of coal are produced in 1990, and the coal for power generation only accounts for 12 percent. Thermal power generation still has huge potential. The energy conservation and consumption reduction of thermal power enterprises not only relate to the cost and the benefit of the enterprises, but also relate to the environmental protection problem. In a thermal power generating unit, the vacuum degree control of a condenser is an important factor which is related to whether the whole unit is economically operated.
Therefore, the device for controlling the operation of the circulating water pump of the thermal power generating unit comprises a central processing unit and a control unit; the acquisition end of the pressure transmitter is positioned in a condenser of the thermal power generating unit, and the output end of the pressure transmitter is connected with the central processing unit; temperature sensor's collection end is located condenser water inlet department, and temperature sensor's output and central processing unit communication connection, like this, pressure transmitter gathers condenser internal pressure data and transmits for central processing unit, and temperature sensor gathers the temperature data transmission of condenser water inlet and transmits for central processing unit, and central processing unit releases corresponding power value as result transmission instruction according to these data and gives the converter, and converter control circulating water pump is according to the power operation of instruction.
The pressure data and the temperature data are used as collected data, the current operation control device of the circulating water pump of the thermal power unit can only store the collected data locally, so that the situation of loss frequently occurs, the collected data need to be transmitted to a background for storage for safety, the collected data are generally transmitted to the background for storage mainly in a WLAN mode at present, and thus, a central processing unit of the operation control device of the circulating water pump of the thermal power unit transmits the collected data to the background through a WLAN channel and then transmits the collected data through the background; the method comprises the steps that sub-data packets of collected data transmitted in parallel can be transmitted through a WLAN channel between a central processing unit and a background, the bandwidth of the sub-data packets of the collected data transmitted in parallel on each sub-channel is changed to different channel bandwidths, and then the sub-data packets of the collected data transmitted in parallel are transmitted through the WLAN channel; through practical use, there may appear: during the period of varying the bandwidth of sub-packets of collected data transmitted in parallel on sub-channels to different channel bandwidths, the adopted channel bandwidth is often used by other applications, and for WLAN data transmission, the required channel bandwidth range is not small, as 204800 × 103Hertz, it is not easy to obtain a sustained frequency of segments for the transfer of acquired data.
Disclosure of Invention
In order to solve the above problems, embodiments of the present invention provide a control system and a method for a thermal power circulating water pump, which effectively avoid a defect that a central processing unit of a thermal power unit circulating water pump operation control device in the prior art needs a small channel bandwidth range when transmitting acquired data to a background via a WLAN channel, and is not easy to obtain a section of continuous frequency for transmitting the acquired data.
In order to overcome the defects in the prior art, the embodiment of the invention provides a control system and a solution of the method thereof for a circulating water pump for thermal power, and the control system specifically comprises the following steps:
a method of a control system for a circulating water pump for thermal power, comprising:
the pressure transmitter collects pressure data inside the condenser and transmits the pressure data to the central processing unit, and the temperature sensor collects temperature data of a water inlet of the condenser and transmits the temperature data to the central processing unit;
the pressure data and the temperature data are used as collected data, and the central processing unit transmits the collected data to a background in the WLAN for storage;
the method for the central processing unit to transfer the collected data to the background in the WLAN comprises the following procedures running on the central processing unit:
a-1: performing bandwidth varying treatment on each sub-data packet of acquired data to be transmitted in parallel on a plurality of sub-channels respectively so as to vary the bandwidth to a corresponding sub-channel to be selected with a preset bandwidth range;
a-2: determining the current sub-data packet, namely determining whether the sub-data packet can use all frequencies in the S-th sub-channel to be selected, wherein the initial value of S is 1, S is an integer variable and is not less than 1 and not more than T, and T is the number of the sub-channels;
if all the frequencies in the S-th sub-channel to be selected can be applied, the operation is switched to A-3 to be executed; if all the frequencies in the S-th sub-channel to be selected can not be used, the operation is switched to A-4 to be executed;
in this application, a method for determining whether there is a frequency of use in an S-th candidate sub-channel includes: if the frequency of the S-th sub-channel to be selected is not used, determining that all the frequencies in the S-th sub-channel to be selected can be used; and if the used frequency exists in the S-th sub-channel to be selected, determining that all the frequencies in the S-th sub-channel to be selected cannot be used.
A-3: the S sub-channel to be selected is used as the S sub-channel for transmitting the sub-data packet, and then the step A-5 is carried out;
a-4: using the sub-channel bandwidth of all frequencies which can be used in the S-th sub-channel to be selected as the S-th sub-channel for transmitting the sub-data packet;
in this application, in a-4, the frequency of the sub-channel that has been used in the S-th sub-channel to be selected is cleared by performing the division on the S-th sub-channel to be selected, and the frequency of the sub-channel remaining in the S-th sub-channel to be selected is used as the corresponding sub-channel for transmitting the sub-packet.
A-5: adding one to the value of S and then assigning to S, and using the latter sub-data packet as the current sub-data packet;
a-6: determining whether S is consistent with the number T of the sub-channels;
if S is lower than T, returning to the execution in A-2; if the S is consistent with the number T of the sub-channels, the S is switched to A-7 to be executed;
a-7: and transmitting the corresponding sub-data packet to the background by using the adopted sub-channel for transmitting the sub-data packet.
In the application, the sub-channel transmitted sub-packet message is also transmitted to the background, so that the background can master the sub-channels respectively used during the sub-packet transmission period of the data collected in the sub-channel transmitted sub-packet message, and the transmitted parallel transmitted collected data sub-packets are restored through the used sub-channels.
The method for the central processing unit to transfer the collected data to the background in the WLAN further comprises the following processes running on the background:
b-1: identifying a sub-channel used by each sub-packet for transmitting the sub-packet;
in the application, the sub-channel used by each sub-data packet for transmitting the sub-data packet can be known and identified by the preset sub-data packet of the collected data, and the sub-channel used by each sub-data packet for transmitting the sub-data packet can also be identified by the message of the sub-channel transmitted by the central processing unit for transmitting the sub-data packet. The subchannels used to deliver the subpackets may be arranged in order.
B-2: taking out corresponding sub data packets through each sub channel for transmitting the sub data packets;
b-3: determining whether the S-th sub-channel for transmitting the sub-data packet is a sub-channel, wherein the initial value of S is 1;
if the S-th transmission channel bandwidth is a sub-channel, the S-th transmission channel bandwidth is switched to the B-4; if the bandwidth of the S-th transmission channel is more than one sub-channel, the S-th transmission channel is switched to the B-5;
b-4: performing bandwidth reduction treatment on the corresponding sub-packet to obtain an actual sub-packet transmitted by the sub-channel for transmitting the sub-packet;
b-5: combining sub-data packets corresponding to sub-channels in the S-th sub-channel for transmitting the sub-data packets, and performing bandwidth reduction treatment on the combined sub-data packets to obtain an actual sub-data packet transmitted by the S-th sub-channel for transmitting the sub-data packets;
b-6: adding one to the value of S and then assigning to S;
b-7: determining whether S is consistent with the number T of the sub-channels;
if S is lower than T, returning to B-3 for execution; if the S is consistent with the number T of the sub-channels, the S is switched to the B-8 to be executed;
b-8: and combining the acquired data which are transmitted in parallel by means of each obtained actual sub-data packet.
A control system for a circulating water pump for thermal power, comprising:
the operation control device of the circulating water pump of the thermal power generating unit comprises a central processing unit of the operation control device of the circulating water pump of the thermal power generating unit; the acquisition end of the pressure transmitter is positioned in a condenser of the thermal power generating unit, and the output end of the pressure transmitter is connected with the central processing unit; the acquisition end of the temperature sensor is positioned at the water inlet of the condenser, and the output end of the temperature sensor is in communication connection with the central processing unit;
the central processing unit is also electrically connected with the WIFI module and is connected with a background in the WLAN through the WIFI module;
the unit running on the central processing unit comprises a variable bandwidth handling unit, a confirming unit, a sub-channel adopting unit and a transmitting unit;
the variable bandwidth processing unit is used for executing variable bandwidth processing on each sub-data packet of the acquired data which is transmitted in parallel on a plurality of sub-channels respectively so as to change the bandwidth to a corresponding sub-channel to be selected with a preset bandwidth range;
the affirmation unit affirms the current sub data packet, that is affirming whether the sub data packet can use all frequency in the S-th sub channel to be selected, the initial value of S is 1, S is integer variable and not less than 1 and not more than T, T is the number of the sub channel;
in this application, the method for recognizing whether there is a frequency of use in the S-th candidate sub-channel by the recognizing unit includes: if the frequency of the S-th sub-channel to be selected is not used, determining that all the frequencies in the S-th sub-channel to be selected can be used; if the used frequency exists in the S-th sub-channel to be selected, determining that all the frequencies in the S-th sub-channel to be selected cannot be used;
the sub-channel adopting unit is used for taking the S-th sub-channel to be selected as the S-th sub-channel for transmitting the sub-data packet if all frequencies in the S-th sub-channel to be selected can be used; if all frequencies in the S-th sub-channel to be selected can not be used, the sub-channel bandwidths with all frequencies which can be used in the S-th sub-channel to be selected are used as the S-th sub-channel for transmitting the sub-data packet;
in this application, the sub-channel adoption unit is configured to divide an S-th sub-channel to be selected, to clear a frequency of the sub-channel that has been used in the S-th sub-channel to be selected, and to use a frequency of a sub-channel remaining in the S-th sub-channel to be selected as a corresponding sub-channel for transmitting the sub-packet;
the transmission unit is used for transmitting the sub-data packet to the background by using the adopted sub-channel for transmitting the sub-data packet.
In this application, the transmitting unit is configured to further transmit the sub-channel transmission sub-packet message to the background, so that the background can master the sub-channels respectively used during the sub-packet transmission period of the data collected in the sub-channel transmission sub-packet message.
The unit running on the background comprises a sub-channel determining unit, a taking-out unit, a monitoring unit, a bandwidth restoring unit and a collected data constructing unit;
the sub-channel identification unit is used for transmitting the information of the sub-data packet by the sub-channel transmitted by the central processing unit and identifying the sub-channel used by each sub-data packet and used for transmitting the sub-data packet;
the extracting unit is used for extracting corresponding sub-data packets through sub-channels used for transmitting the sub-data packets;
the monitoring unit is used for determining whether the S-th sub-channel for transmitting the sub-data packet is a sub-channel or not, and the initial value of S is 1;
the bandwidth restoring unit is used for performing bandwidth restoring treatment on the corresponding sub-data packet to obtain an actual sub-data packet transmitted by the sub-channel for transmitting the sub-data packet if the bandwidth of the S-th transmission channel is a sub-channel; if the bandwidth of the S-th transmission channel is more than one sub-channel, combining sub-packets corresponding to each sub-channel in the S-th sub-channel for transmitting the sub-packets, and performing bandwidth reduction treatment on the combined sub-packets to obtain actual sub-packets transmitted by the S-th sub-channel for transmitting the sub-packets;
the collected data constructing unit is used for combining and forming the collected data transmitted in parallel by means of the obtained actual sub-data packets.
The embodiment of the invention has the beneficial effects that:
if all frequencies in the S-th sub-channel to be selected can be used, the S-th sub-channel to be selected is used as the S-th sub-channel for transmitting the sub-data packet; if all frequencies in the S-th sub-channel to be selected can not be used, the sub-channel bandwidths with all frequencies which can be used in the S-th sub-channel to be selected are used as the S-th sub-channel for transmitting the sub-data packet; the probability that the acquired data are transmitted within a section of continuous frequency within the channel bandwidth range required by the central processing unit to transmit the acquired data to the background through the WLAN channel can be improved; the defect that a central processing unit of a circulating water pump operation control device of a thermal power unit in the prior art needs a small channel bandwidth range when transmitting acquired data to a background through a WLAN channel and cannot easily obtain a continuous frequency for transmitting the acquired data is effectively overcome.
Detailed Description
The following examples are provided to further illustrate the present invention.
The method for the control system of the circulating water pump for thermal power comprises the following steps:
starting a circulating water pump operation control device of a thermal power unit, collecting pressure data in a condenser by a pressure transmitter and transmitting the pressure data to a central processing unit, collecting temperature data of a water inlet of the condenser by a temperature sensor and transmitting the temperature data to the central processing unit, pushing out a corresponding power value according to the data by the central processing unit as a result and transmitting an instruction to a frequency converter, and controlling the circulating water pump to operate according to the power of the instruction by the frequency converter;
the pressure data and the temperature data are used as collected data, and the central processing unit transmits the collected data to a background in the WLAN for storage;
the method for the central processing unit to transfer the collected data to the background in the WLAN comprises the following procedures running on the central processing unit:
a-1: performing bandwidth varying treatment on each sub-data packet of acquired data to be transmitted in parallel on a plurality of sub-channels respectively so as to vary the bandwidth to a corresponding sub-channel to be selected with a preset bandwidth range;
the collected data is divided into a plurality of sub-packets, the number of the sub-packets is consistent with the number of the sub-channels to be selected, namely, the number of the sub-packets of the collected data transmitted in parallel is a pair, and the bandwidth of each sub-packet is changed to a pair of preset bandwidth ranges of 204800 x 10 through bandwidth changing treatment3Hertz' non-identical subchannels. If it isThe main sub-data packets are arranged in sequence, and the first data packet is initially identified as the current sub-data packet.
A-2: determining the current sub-data packet, namely determining whether the sub-data packet can use all frequencies in the S-th sub-channel to be selected, wherein the initial value of S is 1, S is an integer variable and is not less than 1 and not more than T, and T is the number of the sub-channels;
if all the frequencies in the S-th sub-channel to be selected can be applied, the operation is switched to A-3 to be executed; if all the frequencies in the S-th sub-channel to be selected can not be used, the operation is switched to A-4 to be executed;
in this application, a method for determining whether there is a frequency of use in an S-th candidate sub-channel includes: if the frequency of the S-th sub-channel to be selected is not used, determining that all the frequencies in the S-th sub-channel to be selected can be used; and if the used frequency exists in the S-th sub-channel to be selected, determining that all the frequencies in the S-th sub-channel to be selected cannot be used.
As an example, the number of the sub-packets of the collected data transmitted in parallel is two, namely a sub-packet one and a sub-packet two; bandwidth-varying sub-packet to a bandwidth range of 204800 x 10 via variable bandwidth handling3Within the sub-channel I of Hertz, the sub-data packet two is changed into a bandwidth range of 204800 x 103Hertz sub-channel two; since there is no frequency in use within channel bandwidth one, it is assumed that all frequencies within subchannel one can be used; also, for subchannel two, since some of its frequencies are used by channels used by another application, it is determined that all of the frequencies in subchannel two cannot be used, that is, only some of the frequencies in subchannel two can be used.
A-3: the S sub-channel to be selected is used as the S sub-channel for transmitting the sub-data packet, and then the step A-5 is carried out;
a-4: using the sub-channel bandwidth of all frequencies which can be used in the S-th sub-channel to be selected as the S-th sub-channel for transmitting the sub-data packet;
in this application, in a-4, the frequency of the sub-channel that has been used in the S-th sub-channel to be selected is cleared by performing the division on the S-th sub-channel to be selected, and the frequency of the sub-channel remaining in the S-th sub-channel to be selected is used as the corresponding sub-channel for transmitting the sub-packet.
As an example, some of the frequency within subchannel two is used by subchannels used by other applications, however there are some unused; under such conditions, by dividing subchannel two into subchannel five, subchannel six, and subchannel bandwidth seventy-three; subchannel six is already used by the subchannel used by another application, and subchannel five and subchannel seven are not used by the subchannel used by another application, so that subchannel five and subchannel seven may be used to perform the delivery of the subpacket of collected data.
A-5: adding one to the value of S and then assigning to S, and using the latter sub-data packet as the current sub-data packet;
a-6: determining whether S is consistent with the number T of the sub-channels;
if S is lower than T, returning to the execution in A-2; if the S is consistent with the number T of the sub-channels, the S is switched to A-7 to be executed;
a-7: and transmitting the corresponding sub-data packet to the background by using the adopted sub-channel for transmitting the sub-data packet.
In the application, the sub-channel transmitted sub-packet message is also transmitted to the background, so that the background can master the sub-channels respectively used during the sub-packet transmission period of the data collected in the sub-channel transmitted sub-packet message, and the transmitted parallel transmitted collected data sub-packets are restored through the used sub-channels.
The method for the central processing unit to transfer the collected data to the background in the WLAN further comprises the following processes running on the background:
b-1: identifying a sub-channel used by each sub-packet for transmitting the sub-packet;
in the application, the sub-channel used by each sub-data packet for transmitting the sub-data packet can be known and identified by the preset sub-data packet of the collected data, and the sub-channel used by each sub-data packet for transmitting the sub-data packet can also be identified by the message of the sub-channel transmitted by the central processing unit for transmitting the sub-data packet. The subchannels used to deliver the subpackets may be arranged in order.
B-2: taking out corresponding sub data packets through each sub channel for transmitting the sub data packets;
b-3: determining whether the S-th sub-channel for transmitting the sub-data packet is a sub-channel, wherein the initial value of S is 1;
if the S-th transmission channel bandwidth is a sub-channel, the S-th transmission channel bandwidth is switched to the B-4; if the bandwidth of the S-th transmission channel is more than one sub-channel, the S-th transmission channel is switched to the B-5;
b-4: performing bandwidth reduction treatment on the corresponding sub-packet to obtain an actual sub-packet transmitted by the sub-channel for transmitting the sub-packet;
b-5: combining sub-data packets corresponding to sub-channels in the S-th sub-channel for transmitting the sub-data packets, and performing bandwidth reduction treatment on the combined sub-data packets to obtain an actual sub-data packet transmitted by the S-th sub-channel for transmitting the sub-data packets;
in this application, the sub-packets corresponding to each sub-channel in the S-th sub-channel for transmitting sub-packets are combined, and the combined sub-packets are subjected to bandwidth reduction processing, so as to obtain the actual sub-packets transmitted by the S-th sub-channel for transmitting sub-packets. Here, the bandwidth reduction processing can further reduce the frequency of use and reduce the disturbance of each sub-packet during combination.
B-6: adding one to the value of S and then assigning to S;
b-7: determining whether S is consistent with the number T of the sub-channels;
if S is lower than T, returning to B-3 for execution; if the S is consistent with the number T of the sub-channels, the S is switched to the B-8 to be executed;
b-8: and combining the acquired data which are transmitted in parallel by means of the obtained actual sub-packets.
A control system for a circulating water pump for thermal power, comprising:
the operation control device of the circulating water pump of the thermal power generating unit comprises a central processing unit of the operation control device of the circulating water pump of the thermal power generating unit; the central processing unit is in communication connection with the input device, the output device and the memory respectively.
The control device further comprises a pressure transmitter and a temperature sensor, wherein the acquisition end of the pressure transmitter is positioned in a condenser of the thermal power generating unit, and the output end of the pressure transmitter is connected with the central processing unit; the acquisition end of the temperature sensor is positioned at the water inlet of the condenser, and the output end of the temperature sensor is in communication connection with the central processing unit; the central processor is in communication connection with the instruction input end of the frequency converter, and the instruction output end of the frequency converter is connected with the circulating water pump through a cable;
the central processing unit is also electrically connected with the WIFI module and is connected with a background in the WLAN through the WIFI module; the background is a PC.
The unit running on the central processing unit comprises a variable bandwidth handling unit, a confirming unit, a sub-channel adopting unit and a transmitting unit;
the variable bandwidth processing unit is used for executing variable bandwidth processing on each sub-data packet of the acquired data which is transmitted in parallel on a plurality of sub-channels respectively so as to change the bandwidth to a corresponding sub-channel to be selected with a preset bandwidth range;
the affirmation unit affirms the current sub data packet, that is affirming whether the sub data packet can use all frequency in the S-th sub channel to be selected, the initial value of S is 1, S is integer variable and not less than 1 and not more than T, T is the number of the sub channel;
in this application, the method for recognizing whether there is a frequency of use in the S-th candidate sub-channel by the recognizing unit includes: if the frequency of the S-th sub-channel to be selected is not used, determining that all the frequencies in the S-th sub-channel to be selected can be used; if the used frequency exists in the S-th sub-channel to be selected, determining that all the frequencies in the S-th sub-channel to be selected cannot be used;
the sub-channel adopting unit is used for taking the S-th sub-channel to be selected as the S-th sub-channel for transmitting the sub-data packet if all frequencies in the S-th sub-channel to be selected can be used; if all frequencies in the S-th sub-channel to be selected can not be used, the sub-channel bandwidths with all frequencies which can be used in the S-th sub-channel to be selected are used as the S-th sub-channel for transmitting the sub-data packet;
in the application, the sub-channel adoption unit is used for dividing an S-th sub-channel to be selected to clear the frequency of the sub-channel used in the S-th sub-channel to be selected, and using the frequency of the sub-channel remaining in the S-th sub-channel to be selected as a corresponding sub-channel for transmitting the sub-packet;
the transmission unit is used for transmitting the sub-data packet to the background by using the adopted sub-channel for transmitting the sub-data packet.
In this application, the transmitting unit is configured to further transmit the sub-channel transmission sub-packet message to the background, so that the background can master the sub-channels respectively used during the sub-packet transmission period of the data collected in the sub-channel transmission sub-packet message.
The unit running on the background comprises a sub-channel determining unit, a taking-out unit, a monitoring unit, a bandwidth restoring unit and a collected data constructing unit;
the sub-channel identification unit is used for transmitting the sub-channel information of the sub-data packet by means of the sub-channel transmitted by the central processing unit and identifying the sub-channel used by each sub-data packet for transmitting the sub-data packet;
the extracting unit is used for extracting corresponding sub-data packets through sub-channels used for transmitting the sub-data packets;
the monitoring unit is used for determining whether the S-th sub-channel for transmitting the sub-data packet is a sub-channel or not, and the initial value of S is 1;
the bandwidth reduction unit is used for performing bandwidth reduction treatment on the corresponding sub-data packet to obtain an actual sub-data packet transmitted by the sub-channel for transmitting the sub-data packet if the bandwidth of the S-th transmission channel is a sub-channel; if the bandwidth of the S-th transmission channel is more than one sub-channel, combining sub-packets corresponding to each sub-channel in the S-th sub-channel for transmitting the sub-packets, and performing bandwidth reduction treatment on the combined sub-packets to obtain actual sub-packets transmitted by the S-th sub-channel for transmitting the sub-packets;
the collected data constructing unit is used for combining and forming the collected data transmitted in parallel by means of the obtained actual sub-data packets.
While the embodiments of the present invention have been described above in terms of procedures illustrated by the embodiments, it will be understood by those skilled in the art that the present disclosure is not limited to the embodiments described above, and that various changes, modifications, and substitutions can be made without departing from the scope of the embodiments of the present invention.
Claims (8)
1. A method of a control system for a circulating water pump for thermal power, comprising:
the pressure transmitter collects pressure data inside the condenser and transmits the pressure data to the central processing unit, and the temperature sensor collects temperature data of a water inlet of the condenser and transmits the temperature data to the central processing unit;
the pressure data and the temperature data are used as collected data, and the central processing unit transmits the collected data to a background in the WLAN for storage;
the method for the central processing unit to transfer the collected data to the background in the WLAN comprises the following procedures running on the central processing unit:
a-1: performing bandwidth varying treatment on each sub-data packet of acquired data to be transmitted in parallel on a plurality of sub-channels respectively so as to vary the bandwidth to a corresponding sub-channel to be selected with a preset bandwidth range;
a-2: determining the current sub-data packet, namely determining whether the sub-data packet can use all frequencies in the S-th sub-channel to be selected, wherein the initial value of S is 1, S is an integer variable and is not less than 1 and not more than T, and T is the number of the sub-channels;
if all the frequencies in the S-th sub-channel to be selected can be applied, the operation is switched to A-3 to be executed; if all the frequencies in the S-th sub-channel to be selected can not be used, the operation is switched to A-4 to be executed;
a-3: the S sub-channel to be selected is used as the S sub-channel for transmitting the sub-data packet, and then the step A-5 is carried out;
a-4: using the sub-channel bandwidth of all frequencies which can be used in the S-th sub-channel to be selected as the S-th sub-channel for transmitting the sub-data packet;
a-5: adding one to the value of S and then assigning to S, and using the latter sub-data packet as the current sub-data packet;
a-6: determining whether S is consistent with the number T of the sub-channels;
if S is lower than T, returning to the execution in A-2; if the S is consistent with the number T of the sub-channels, the S is switched to A-7 to be executed;
a-7: and transmitting the corresponding sub-data packet to the background by using the adopted sub-channel for transmitting the sub-data packet.
2. The method for the control system of the circulating water pump for thermal power of claim 1, wherein the method for determining whether the sub-packet can use all frequencies in the S-th sub-channel to be selected comprises the following steps: if the frequency of the S-th sub-channel to be selected is not used, determining that all the frequencies in the S-th sub-channel to be selected can be used; and if the used frequency exists in the S-th sub-channel to be selected, determining that all the frequencies in the S-th sub-channel to be selected cannot be used.
3. The method for the control system of the circulating water pump for thermal power according to claim 1, wherein in a-4, the frequency of the sub-channel which is already in use in the S-th sub-channel is cleared by performing division on the S-th sub-channel to be selected, and the frequency of the sub-channel remaining in the S-th sub-channel to be selected is used as the corresponding sub-channel for transferring the sub-packet.
4. The method for controlling a circulating water pump for thermal power as claimed in claim 1, wherein the sub-channel transmission sub-packet message is further transmitted to the background, so that the background can grasp the sub-channel used by each sub-packet during the sub-packet transmission of the data collected in the sub-channel transmission sub-packet message, thereby recovering the sub-packets of the collected data transmitted in parallel via the sub-channels used.
5. The method for the control system of the circulating water pump for thermal power according to claim 1, wherein the method for the central processing unit to transfer the collected data to the background in the WLAN further comprises the following procedures running on the background:
b-1: identifying the sub-channel used by each sub-packet for transmitting the sub-packet;
b-2: taking out corresponding sub data packets through each sub channel for transmitting the sub data packets;
b-3: determining whether the S-th sub-channel for transmitting the sub-data packet is a sub-channel, wherein the initial value of S is 1;
if the S-th transmission channel bandwidth is a sub-channel, the S-th transmission channel bandwidth is switched to the B-4; if the bandwidth of the S-th transmission channel is more than one sub-channel, the S-th transmission channel is switched to the B-5;
b-4: performing bandwidth reduction treatment on the corresponding sub-packet to obtain an actual sub-packet transmitted by the sub-channel for transmitting the sub-packet;
b-5: combining sub-data packets corresponding to sub-channels in the S-th sub-channel for transmitting the sub-data packets, and performing bandwidth reduction treatment on the combined sub-data packets to obtain an actual sub-data packet transmitted by the S-th sub-channel for transmitting the sub-data packets;
b-6: adding one to the value of S and then assigning to S;
b-7: determining whether S is consistent with the number T of the sub-channels;
if S is lower than T, returning to B-3 for execution; if the S is consistent with the number T of the sub-channels, the S is switched to the B-8 to be executed;
b-8: and combining the acquired data which are transmitted in parallel by means of the obtained actual sub-packets.
6. The method for the control system of the circulating water pump for thermal power according to claim 5, wherein the sub-channels used for transmitting the sub-packets and used for transmitting the sub-packets are determined by using the preset sub-packets of the collected data, and the sub-channels used for transmitting the sub-packets and used for transmitting the sub-packets are determined by using the message of the sub-channel transmission sub-packets transmitted by the central processing unit, and the sub-channels used for transmitting the sub-packets can be arranged in sequence.
7. A control system of a circulating water pump for thermal power is characterized by comprising:
the thermal power unit circulating water pump operation control device comprises a central processing unit of the thermal power unit circulating water pump operation control device; the acquisition end of the pressure transmitter is positioned in a condenser of the thermal power unit, and the output end of the pressure transmitter is connected with the central processing unit; the acquisition end of the temperature sensor is positioned at the water inlet of the condenser, and the output end of the temperature sensor is in communication connection with the central processing unit;
the central processing unit is also electrically connected with the WIFI module and is connected with a background in the WLAN through the WIFI module;
the unit running on the central processing unit comprises a variable bandwidth handling unit, a confirming unit, a sub-channel adopting unit and a transmitting unit;
the variable bandwidth processing unit is used for executing variable bandwidth processing on each sub-data packet of the acquired data which is transmitted in parallel on a plurality of sub-channels respectively so as to change the bandwidth to a corresponding sub-channel to be selected with a preset bandwidth range;
the affirmation unit affirms the current sub data packet, that is affirming whether the sub data packet can use all frequency in the S-th sub channel to be selected, the initial value of S is 1, S is integer variable and not less than 1 and not more than T, T is the number of the sub channel;
the method for the affirming unit to affirm the sub data packet whether to use all frequency in the S sub channel to be selected includes: if the frequency of the S-th sub-channel to be selected is not used, determining that all the frequencies in the S-th sub-channel to be selected can be used; if the used frequency exists in the S-th sub-channel to be selected, determining that all the frequencies in the S-th sub-channel to be selected cannot be used;
the sub-channel adopting unit is used for taking the S-th sub-channel to be selected as the S-th sub-channel for transmitting the sub-data packet if all frequencies in the S-th sub-channel to be selected can be used; if all frequencies in the S-th sub-channel to be selected can not be used, the sub-channel bandwidths with all frequencies which can be used in the S-th sub-channel to be selected are used as the S-th sub-channel for transmitting the sub-data packet;
the sub-channel adopting unit is used for dividing the S-th sub-channel to be selected to clear the used frequency of the sub-channel in the S-th sub-channel to be selected, and the frequency of the sub-channel remained in the S-th sub-channel to be selected is used as the corresponding sub-channel for transmitting the sub-data packet;
the transmission unit is used for transmitting the corresponding sub-data packet to the background by using the adopted sub-channel for transmitting the sub-data packet; the transmission unit is used for transmitting the sub-channel transmission sub-data packet message to the background, so that the background can master the sub-channels respectively used in the sub-channel transmission sub-data packet transmission period of the data collected in the sub-channel transmission sub-data packet message.
8. The control system of the circulating water pump for thermal power according to claim 7, wherein the units operating on the background comprise a sub-channel recognizing unit, a fetching unit, a monitoring unit, a bandwidth restoring unit and a collected data constructing unit;
the sub-channel identification unit is used for transmitting the information of the sub-data packet by the sub-channel transmitted by the central processing unit and identifying the sub-channel used by each sub-data packet and used for transmitting the sub-data packet;
the extracting unit is used for extracting corresponding sub-data packets through sub-channels used for transmitting the sub-data packets;
the monitoring unit is used for determining whether the S-th sub-channel for transmitting the sub-data packet is a sub-channel or not, and the initial value of S is 1;
the bandwidth reduction unit is used for performing bandwidth reduction treatment on the corresponding sub-data packet to obtain an actual sub-data packet transmitted by the sub-channel for transmitting the sub-data packet if the bandwidth of the S-th transmission channel is a sub-channel; if the bandwidth of the S-th transmission channel is more than one sub-channel, combining sub-packets corresponding to each sub-channel in the S-th sub-channel for transmitting the sub-packets, and performing bandwidth reduction treatment on the combined sub-packets to obtain actual sub-packets transmitted by the S-th sub-channel for transmitting the sub-packets;
the collected data constructing unit is used for combining and forming the collected data transmitted in parallel by means of the obtained actual sub-data packets.
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