CN110672975B - Automatic detection method and device for heliostat power supply cable connection reliability - Google Patents
Automatic detection method and device for heliostat power supply cable connection reliability Download PDFInfo
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- CN110672975B CN110672975B CN201910977312.0A CN201910977312A CN110672975B CN 110672975 B CN110672975 B CN 110672975B CN 201910977312 A CN201910977312 A CN 201910977312A CN 110672975 B CN110672975 B CN 110672975B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
Abstract
The invention discloses an automatic detection method and device for heliostat power supply cable connection reliability, which are characterized in that through a one-key starting process, static/dynamic power supply data collection is simultaneously carried out on a plurality of heliostat power supply cables, the power supply data are static/dynamic power supply current and static/dynamic power supply voltage, the power supply data of the heliostat power supply cables are simultaneously processed and calculated, meanwhile, the heliostat power supply cables are compared and judged to confirm the connection reliability condition of the power supply cables, the comparison and judgment are carried out in parallel, any comparison and judgment is carried out independently, the heliostat power supply cables are switched to the next heliostat for comparison and judgment after the judgment is finished until the detection of all the heliostat power supply cables is finished, and no other comparison and judgment is needed. The method provides feasibility for detecting the connection reliability of the power supply cables of the heliostats in large quantities, saves a large amount of manpower and material resources, and is simple in whole detection process, low in whole time consumption and high in efficiency.
Description
Technical Field
The invention belongs to the technical field of power supply cable detection, and particularly relates to an automatic detection method and device for heliostat power supply cable connection reliability.
Background
Solar energy is increasingly applied as a clean renewable energy source, and particularly, a photo-thermal power generation technology is a new solar energy utilization technology following a photovoltaic power generation technology. Among several photo-thermal power generation technologies, tower-type solar thermal power generation adopts a large number of heliostats to gather sunlight on a heat absorber arranged on the top of a heat absorption tower, and heat a working medium to generate steam to drive a steam turbine to drive a generator to generate power. The whole heliostat field of the tower type solar thermal power generation heliostat comprises thousands of heliostats, so that the reliability of a power supply cable of each heliostat needs to be confirmed, and the operation stability of the heliostats is ensured.
The existing equipment power supply cable reliability testing method is used for detecting a heliostat power supply cable, the cable needs to be electrified by a constant current source, the voltage value is detected by equipment, the operation is relatively complex, and for a heliostat field of tower type solar energy, the operation needs to be carried out on each heliostat in sequence, the mass detection efficiency is very low, a large amount of manpower and material resources are needed, the detection period is long, when the reliability of the power supply cable is found to be in a problem, only one heliostat can be overhauled, the subsequent overhaul work of the power supply cable is not facilitated, the method is only suitable for scenes with a small number of equipment, and the method is not suitable for a testing environment with a large number of heliostats like a heliostat field of solar thermal power generation.
Disclosure of Invention
The invention aims to provide an automatic detection method and device for the connection reliability of heliostat power supply cables, and aims to solve the technical problem of how to efficiently detect the connection reliability of a plurality of heliostat power supply cables.
In order to solve the problems, the technical scheme of the invention is as follows:
an automatic detection method for heliostat power supply cable connection reliability comprises the following steps:
s1: inputting a starting detection instruction, and starting a power supply cable connection reliability detection process of the heliostat;
s2: stopping the rotation of the heliostats, collecting static power supply voltage and static power supply current of the heliostat power supply cables in a heliostat static state, and performing digital filtering on the static power supply voltage and the static power supply current to obtain static voltage values and static current values of the heliostat power supply cables;
s3: executing power consumption strategic actions on the heliostats, acquiring dynamic power supply voltages and dynamic power supply currents of the heliostat power supply cables in a heliostat dynamic state, and performing digital filtering on the dynamic power supply voltages and the dynamic power supply currents to obtain dynamic voltage values and dynamic current values of the heliostat power supply cables;
s4: obtaining a voltage absolute value through a difference value of the dynamic voltage value and the static voltage value, obtaining a current absolute value through a difference value of the dynamic current value and the static current value, and calculating a resistance value of the power supply cable through a ratio of the voltage absolute value to the current absolute value;
s5: simultaneously, comparing and judging the static voltage values and the resistance values of the power supply cables of the heliostats with corresponding preset tolerance values respectively:
if the static voltage value and the resistance value of the power supply cable are within the corresponding tolerance ranges, displaying that the power supply cable is normal;
if the static voltage value or the resistance value of the power supply cable is not within the corresponding tolerance range, displaying that the power supply cable is abnormal;
and when the comparison and judgment of any heliostat power supply cable is finished, switching to the next heliostat power supply cable for comparison and judgment until the detection of all heliostat power supply cables is finished.
Further preferably, the step S1 further includes the steps of: heliostats of one area are selected as detection targets, and the parallel processing amount of the simultaneous comparison determination in step S5 is set.
The invention also provides an automatic detection device for the connection reliability of the heliostat power supply line, which comprises: the heliostat controller comprises a voltage and current detection function block, a calculation processing function block, a communication management function block and an execution function block; wherein the content of the first and second substances,
the computer is communicated with the communication management function block through a mirror field communication network and is used for inputting a starting detection instruction and starting a power supply cable connection reliability detection process of the heliostat;
the execution functional block is communicated with the computer through the communication management functional block and is used for stopping the rotation of the heliostats and executing power consumption strategic actions on the heliostats;
the voltage and current detection function block is used for collecting static power supply voltage and static power supply current of a plurality of heliostat power supply cables in a heliostat static state and collecting dynamic power supply voltage and dynamic power supply current of the plurality of heliostat power supply cables in a heliostat dynamic state;
the calculation processing function block is electrically connected with the voltage and current detection function block and is used for performing digital filtering on static power supply voltage, static power supply current, dynamic power supply voltage and dynamic power supply current to obtain static voltage values, static current values, dynamic voltage values and dynamic current values of the heliostat power supply cables, obtaining voltage absolute values through the difference values of the dynamic voltage values and the static voltage values, obtaining current absolute values through the difference values of the dynamic current values and the static current values, and calculating the resistance values of the power supply cables through the ratio of the voltage absolute values to the current absolute values;
the computer is communicated with the calculation processing function block through the communication management function block and is used for comparing and judging the static voltage values and the resistance values of the power supply cables of the heliostats with corresponding preset tolerance values respectively at the same time: if the static voltage value and the resistance value of the power supply cable are within the corresponding tolerance ranges, displaying that the power supply cable is normal; if the static voltage value or the resistance value of the power supply cable is not within the corresponding tolerance range, displaying that the power supply cable is abnormal; and when the comparison and judgment of any heliostat power supply cable is finished, switching to the next heliostat power supply cable for comparison and judgment until the detection of all heliostat power supply cables is finished.
Further preferably, the computer is further configured to select heliostats of one region as detection targets, and set a parallel processing amount of the simultaneous comparison and determination.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages and positive effects:
the detection method adopts a one-key input starting detection instruction to start a detection process, the whole detection process is automatic, wherein static/dynamic power supply data acquisition is carried out on a plurality of heliostat power supply cables simultaneously, the power supply data are static/dynamic power supply current and static/dynamic power supply voltage, the power supply data of the heliostat power supply cables are processed and calculated simultaneously, comparison judgment is carried out on the plurality of heliostat power supply cables simultaneously to confirm the connection reliability condition of the power supply cables, the comparison judgment is carried out in parallel, any comparison judgment is carried out independently, the judgment is switched to the next heliostat for comparison judgment after finishing judgment, other comparison judgment is not required, the defect that a constant current source test method is only suitable for detection of a small amount of equipment is overcome, the reliability detection of the heliostat field connection cables in large batch can be carried out in parallel, a large amount of manpower and material resources are saved, the whole detection process is simple, the whole time consumption is reduced, the efficiency is improved, the computer can periodically detect the connection reliability of the heliostat power supply cable, and the abnormity of the electric cable can be found in the fastest time.
Drawings
FIG. 1 is a flow chart of a heliostat power cable connection reliability detection method of the invention;
FIG. 2 is a schematic diagram of a comparative judgment flow of the heliostat power supply cable connection reliability detection method of the invention;
FIG. 3 is a schematic view of a heliostat controller configuration of the heliostat power cable connection reliability detection apparatus of the invention;
fig. 4 is a schematic detection flow diagram of the heliostat power supply cable connection reliability detection device according to the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
The following provides a method and an apparatus for automatically detecting the connection reliability of a heliostat power cable, which are provided by the present invention, with reference to the accompanying drawings and specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims.
Referring to fig. 1, the present embodiment provides an automatic detection method for heliostat power cable connection reliability, including the following steps:
s1: inputting a starting detection instruction, and starting a power supply cable connection reliability detection process of the heliostat;
s2: stopping the rotation of the heliostats, collecting static power supply voltage and static power supply current of the heliostat power supply cables in a heliostat static state, and performing digital filtering on the static power supply voltage and the static power supply current to obtain static voltage values and static current values of the heliostat power supply cables;
s3: executing power consumption strategic actions on the heliostats, acquiring dynamic power supply voltages and dynamic power supply currents of the heliostat power supply cables in a heliostat dynamic state, and performing digital filtering on the dynamic power supply voltages and the dynamic power supply currents to obtain dynamic voltage values and dynamic current values of the heliostat power supply cables;
s4: obtaining a voltage absolute value through a difference value of the dynamic voltage value and the static voltage value, obtaining a current absolute value through a difference value of the dynamic current value and the static current value, and calculating a resistance value of the power supply cable through a ratio of the voltage absolute value to the current absolute value;
s5: simultaneously, comparing and judging the static voltage values and the resistance values of the power supply cables of the heliostats with corresponding preset tolerance values respectively: if the static voltage value and the resistance value of the power supply cable are within the corresponding tolerance ranges, displaying that the power supply cable is normal; if the static voltage value or the resistance value of the power supply cable is not within the corresponding tolerance range, displaying that the power supply cable is abnormal; and when the comparison and judgment of any heliostat power supply cable is finished, switching to the next heliostat power supply cable for comparison and judgment until the detection of all heliostat power supply cables is finished.
The present embodiment will now be described in detail:
in this implementation, referring to fig. 1, a command for detecting the connection reliability of the heliostat power supply cables is issued in batch only by manually inputting a key by a computer through which a worker passes, the computer sends the command to enter a communication management module of a heliostat controller through a heliostat field network, and a detection flow is started. Because the detection only needs to send the instruction, the automatic detection can be carried out completely, and the manpower for manually testing one cable is greatly reduced.
The method of the present embodiment may be implemented by a device including, but not limited to, the device shown in fig. 3, wherein the execution function block stops the rotation of the heliostat and keeps the heliostat in a stationary state after receiving an instruction from the communication management module. And then, when the heliostat is in a static state, the current detection function block and the voltage detection function block start to work, the static power supply current and the static power supply voltage of a plurality of heliostat electric cables are read, each heliostat electric cable can be measured for a plurality of times, and a plurality of groups of measured data are sent to the calculation processing function block. The measured multiple groups of static supply currents and static supply voltages are subjected to digital filtering processing in the calculation processing functional block to obtain static current values and static voltage values required by the embodiment. And when the static power supply current and the static power supply voltage are processed, the execution function block starts to operate, so that a plurality of heliostats in current measurement perform power consumption strategic actions, namely the heliostats rotate without stopping and the rotation speed is higher than that under normal use conditions. When the heliostat performing power consumption strategic action rotates stably, the current detection function block and the voltage detection function block start to work, dynamic power supply current and dynamic power supply voltage of a plurality of heliostat electric cables are read, and each heliostat electric cable can be measured for many times. Similarly, the measured multiple sets of dynamic supply currents and dynamic supply voltages are subjected to digital filtering processing in the calculation processing functional block to obtain dynamic current values and dynamic voltage values required by the embodiment. And after the data acquisition is finished, the execution functional block stops the power consumption strategic action and restores the normal working state. Meanwhile, the calculation processing module obtains a voltage absolute value by taking the absolute value of the obtained difference between the static voltage value and the dynamic voltage value, obtains a current absolute value by taking the absolute value of the obtained difference between the static current value and the dynamic current value, and then obtains the resistance value of the corresponding heliostat power supply cable by dividing the voltage absolute value by the current absolute value. The obtained static voltage value and resistance value of each heliostat power supply cable are sent to a computer.
Referring to fig. 1, specifically, the obtained data is determined in a computer, if the obtained static power supply voltage of any one heliostat power supply cable is within a corresponding set tolerance range and the obtained node resistance value is also within a corresponding tolerance range, the heliostat power supply cable is determined to be normal, and the computer displays that the heliostat power supply cable is detected normally and finished; and if the obtained static power supply voltage of any heliostat power supply cable is out of the corresponding set tolerance range or the obtained node resistance value is out of the corresponding tolerance range, judging that the heliostat power supply cable is abnormal, displaying the abnormality of the heliostat power supply cable in a computer, informing a user of the abnormality, and entering the next step after the judgment is finished.
Referring to fig. 2, the comparison of the present embodiment preferably determines that: the computer compares the obtained static power supply voltage with a tolerance range set correspondingly, and if the static power supply voltage is within the tolerance range set correspondingly, the next step of judgment is carried out; if the current tolerance is out of the corresponding set tolerance range, the computer displays abnormity, the judgment is finished, and the next step is carried out. After the static power supply voltage is judged, the computer compares the resistance value of the heliostat power supply cable with the corresponding set tolerance range, if the resistance value of the heliostat power supply cable is within the corresponding set tolerance range, the computer displays normal, and the next step is entered after the detection is finished; and if the resistance value of the heliostat power supply cable is out of the tolerance range correspondingly set by the heliostat power supply cable, displaying the abnormality by the computer and entering the next step.
Referring to fig. 2, preferably, the step S1 further includes the steps of: heliostats of one area are selected as detection targets, and the parallel processing amount of the simultaneous comparison determination in step S5 is set. Specifically, before the start of the detection, an area of the heliostat to be detected may be set as a detection object, and the number of heliostat electric cables that can be detected simultaneously in this embodiment may also be set according to the performance of the computer.
Referring to fig. 2, preferably, the computer data enters a step of determining whether there is a heliostat electric cable to be tested after the determination is finished, and if there is a heliostat to be tested, a new heliostat electric cable is detected; and if no heliostat to be detected exists, ending the whole detection process. Preferably, after one of the regions is detected, periodic detection can be performed according to preset region division, so that the operation reliability of the heliostat is ensured, and abnormal power supply cables are found in real time.
Referring to fig. 3 and 4, the present embodiment provides an automatic detection apparatus for heliostat power supply cable connection reliability, including a heliostat controller and a computer, where the heliostat controller includes a voltage and current detection function block, a calculation processing function block, a communication management function block, and an execution function block; wherein the content of the first and second substances,
the computer is communicated with the communication management function block through a mirror field communication network and is used for inputting a starting detection instruction and starting a power supply cable connection reliability detection process of the heliostat;
the execution functional block is communicated with the computer through the communication management functional block and is used for stopping the rotation of the heliostats and executing power consumption strategic actions on the heliostats;
the voltage and current detection function block is used for collecting static power supply voltage and static power supply current of a plurality of heliostat power supply cables in a heliostat static state and collecting dynamic power supply voltage and dynamic power supply current of the plurality of heliostat power supply cables in a heliostat dynamic state;
the calculation processing function block is electrically connected with the voltage and current detection function block and is used for performing digital filtering on static power supply voltage, static power supply current, dynamic power supply voltage and dynamic power supply current to obtain static voltage values, static current values, dynamic voltage values and dynamic current values of the heliostat power supply cables, obtaining voltage absolute values through the difference values of the dynamic voltage values and the static voltage values, obtaining current absolute values through the difference values of the dynamic current values and the static current values, and calculating the resistance values of the power supply cables through the ratio of the voltage absolute values to the current absolute values;
the computer is communicated with the calculation processing function block through the communication management function block and is used for comparing and judging the static voltage values and the resistance values of the power supply cables of the heliostats with corresponding preset tolerance values respectively at the same time: if the static voltage value and the resistance value of the power supply cable are within the corresponding tolerance ranges, displaying that the power supply cable is normal; if the static voltage value or the resistance value of the power supply cable is not within the corresponding tolerance range, displaying that the power supply cable is abnormal; and when the comparison and judgment of any heliostat power supply cable is finished, switching to the next heliostat power supply cable for comparison and judgment until the detection of all heliostat power supply cables is finished.
In summary, in the embodiment, the detection process is started through one-click operation of sending an instruction by the computer, and the whole process is automatically detected, so that convenience is provided for detecting the connection reliability of the power supply cable of the heliostat; the computer can automatically issue the starting detection instruction in a batch parallel manner, so that the defect that a constant current source test method is only suitable for detecting a small amount of equipment is overcome, the feasibility is provided for detecting the connection reliability of a large batch of heliostat power supply cables, and a large amount of manpower and material resources are saved; the performance of the computer is reasonably utilized in a parallel detection mode, so that the whole time consumption is shorter and the efficiency is higher; the abnormity of the electric cable is displayed through a computer display screen, so that a maintenance worker can find the abnormal power supply cable in real time through the prompt of a computer; the power supply cables in all the areas can be periodically checked in turn through computer design, extra manpower is not needed, the heliostat in the heliostat field can be timely found when abnormality occurs, and normal operation of the whole heliostat field is guaranteed.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, it is still within the scope of the present invention if they fall within the scope of the claims of the present invention and their equivalents.
Claims (4)
1. An automatic detection method for heliostat power supply cable connection reliability is characterized by comprising the following steps:
s1: inputting a starting detection instruction, and starting a power supply cable connection reliability detection process of the heliostat;
s2: stopping the rotation of the heliostats, collecting static power supply voltages and static power supply currents of the heliostat power supply cables in a heliostat static state, and performing digital filtering on the static power supply voltages and the static power supply currents to obtain static voltage values and static current values of the heliostat power supply cables;
s3: executing power consumption strategic actions on the heliostats, acquiring dynamic power supply voltages and dynamic power supply currents of power supply cables of the heliostats in a dynamic state of the heliostats, and performing digital filtering on the dynamic power supply voltages and the dynamic power supply currents to obtain dynamic voltage values and dynamic current values of the power supply cables of the heliostats, wherein the power consumption strategic actions are that the heliostats rotate without stopping and the rotation speed is higher than that under a normal use condition;
s4: obtaining a voltage absolute value through the difference value of the dynamic voltage value and the static voltage value, obtaining a current absolute value through the difference value of the dynamic current value and the static current value, and calculating the resistance value of the power supply cable through the ratio of the voltage absolute value to the current absolute value;
s5: simultaneously, comparing and judging the static voltage values and the resistance values of the power supply cables of the heliostats with corresponding preset tolerance values respectively:
if the static voltage value and the resistance value of the power supply cable are both within the corresponding tolerance range, displaying that the power supply cable is normal;
if the static voltage value or the resistance value of the power supply cable is not within the corresponding tolerance range, displaying that the power supply cable is abnormal;
and when the comparison and judgment of any heliostat power supply cable is finished, switching to the next heliostat power supply cable for comparison and judgment until the detection of all heliostat power supply cables is finished.
2. The method for automatically detecting the reliability of a heliostat power cable connection according to claim 1, wherein the step S1 further comprises the steps of: heliostats of one area are selected as detection targets, and the parallel processing amount of the simultaneous comparison and determination in step S5 is set.
3. An automatic detection device for heliostat power supply line connection reliability, comprising: the heliostat controller comprises a voltage and current detection function block, a calculation processing function block, a communication management function block and an execution function block; wherein the content of the first and second substances,
the computer is communicated with the communication management function block through a field-of-mirror communication network and is used for inputting a starting detection instruction and starting a power supply cable connection reliability detection process of the heliostat;
the execution function block is communicated with the computer through the communication management function block and is used for stopping the rotation of the heliostats and executing power consumption strategic actions on the heliostats;
the voltage and current detection function block is used for collecting static power supply voltage and static power supply current of a plurality of heliostat power supply cables in a heliostat static state and collecting dynamic power supply voltage and dynamic power supply current of the plurality of heliostat power supply cables in a heliostat dynamic state;
the calculation processing function block is electrically connected with the voltage and current detection function block and is used for performing digital filtering on the static power supply voltage, the static power supply current, the dynamic power supply voltage and the dynamic power supply current to obtain static voltage values, static current values, dynamic voltage values and dynamic current values of a plurality of heliostat power supply cables, obtaining voltage absolute values through the difference values of the dynamic voltage values and the static voltage values, obtaining current absolute values through the difference values of the dynamic current values and the static current values, and calculating the resistance values of the power supply cables through the ratio of the voltage absolute values to the current absolute values;
the computer is communicated with the calculation processing function block through the communication management function block and is used for simultaneously comparing and judging the static voltage values and the resistance values of the power supply cables of the heliostats with corresponding preset tolerance values respectively: if the static voltage value and the resistance value of the power supply cable are both within the corresponding tolerance range, displaying that the power supply cable is normal; if the static voltage value or the resistance value of the power supply cable is not within the corresponding tolerance range, displaying that the power supply cable is abnormal; and when the comparison and judgment of any heliostat power supply cable is finished, switching to the next heliostat power supply cable for comparison and judgment until the detection of all heliostat power supply cables is finished.
4. The apparatus according to claim 3, wherein the computer is further configured to select heliostats of one block as detection targets and set a parallel processing amount of the simultaneous comparison determination.
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| CN101673933A (en) * | 2009-08-25 | 2010-03-17 | 山东中瑞电气有限公司 | Protection device of power supply line disconnection fault |
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