Intelligent control method, device and equipment for relay protection hard pressure plate and storage medium

Abstract

The application provides a relay protection hard panel intelligent control method, device, equipment and storage medium, the method comprises the following steps: a hard panel action signal is sent by an indicating lamp button integrated switch or an upper computer, and a preset reference current value is set according to an action instruction; a coil current value is collected by a current sensor, and a current error value is obtained by comparing the coil current value with the preset reference current value; then, a switch state is determined according to a preset switch state table according to the error value; finally, a switch tube driving circuit is controlled according to the switch state, the coil excitation current is dynamically adjusted, and burning is prevented; after the action is completed, the indicating lamp is driven to display the corresponding position color according to the hard panel action signal, and the position state is updated to the upper computer, so that the hard panel state is accurately monitored and automatically controlled, and the power grid operation safety is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of hard pressure plate control, and particularly relates to a relay protection hard pressure plate intelligent control method, device, equipment and storage medium. BACKGROUND

[0002] As a key entity device in the relay protection system, the hard pressure plate is usually placed in the protection cabinet and exists in the form of hardware such as a connecting sheet, and serves as a bridge and a link between the protection device and the external secondary circuit wiring. Its essence is a mechanical switch connection device, which realizes the regulation and control of core electrical quantities such as current and voltage in the power system through accurate control of the open and closed states, thereby building the first line of defense for protection devices and containing fault spread.

[0003] The hard pressure plate not only undertakes the heavy task of protection switching, but also realizes dynamic input or output of the protection device through flexible adjustment of the open and closed states, and further flexibly customizes the protection strategy of the power system. Meanwhile, as an indispensable part of the secondary circuit, it also ensures accurate and reliable transmission and execution of protection signals between parts of the power system.

[0004] However, the traditional relay protection hard pressure plate control relies on mechanical relays or basic open-loop circuits, and lacks current feedback mechanism. In actual application, the current of the excitation coil of the hard pressure plate is easily affected by power grid fluctuations when the hard pressure plate is actuated, resulting in overcurrent or undercurrent phenomenon and causing coil overheating and burning. For example, the traditional scheme often uses fixed timing control, which cannot adjust the switch tube state in real time, so that the current tracking error of the hard pressure plate is large during the opening and closing process, increasing the risk of equipment failure. SUMMARY

[0005] The purpose of the present application is to overcome the defects in the prior art, and to provide a relay protection hard pressure plate intelligent control method, device, equipment and storage medium, which integrates a current sensor and a dynamic switch state table through an embedded system to realize accurate regulation of the coil current, thereby overcoming the shortcomings of the prior art.

[0006] The present application provides a relay protection hard pressure plate intelligent control method applied to an embedded hard pressure plate drive control system, wherein the embedded hard pressure plate drive control system comprises a current sensor and a switch tube drive circuit, and the method comprises:

[0007] Obtaining a coil current value, wherein the coil current value is collected by the current sensor;

[0008] Determining a current error value according to the coil current value and a preset reference current value;

[0009] determine a switch state according to the current error value and a preset switch state table, the preset switch state table comprising a plurality of switch state rules, each of the switch state rules corresponding to a current error range;

[0010] control the switch tube driving circuit according to the switch state to adjust the coil excitation current to prevent burning.

[0011] Optionally, the switch tube driving circuit comprises a full-bridge topology.

[0012] The full-bridge topology comprises a first switch tube, a second switch tube, a third switch tube and a fourth switch tube; the switch state rules comprise: when the current error value is less than 0, driving the first switch tube and the fourth switch tube to be conductive; when the current error value is within a hysteresis width, driving the first switch tube and the third switch tube to be conductive; and when the current error value is greater than an upper limit of the hysteresis width, driving the second switch tube and the third switch tube to be conductive.

[0013] Optionally, the control of the switch tube driving circuit according to the switch state comprises:

[0014] when the current error value is within the hysteresis width, applying a 0-state voltage to the coil.

[0015] Optionally, the determination of the current error value according to the coil current value and a preset reference current value comprises:

[0016] receiving an action instruction signal;

[0017] when the action instruction signal is a tripping instruction, setting the preset reference current value as a reverse current value;

[0018] when the action instruction signal is a closing instruction, setting the preset reference current value as a forward current value.

[0019] Optionally, the action instruction signal comprises:

[0020] being sent by a status button detection circuit of a hard pressure plate indicator light button integrated switch, or

[0021] being sent by an upper computer connected through a communication interface.

[0022] Optionally, the indicator light of the hard pressure plate indicator light button integrated switch displays different colors according to the position state of the hard pressure plate, comprising:

[0023] obtaining the position state of the hard pressure plate through auxiliary contacts of an operating mechanism;

[0024] when the position state is closing, driving the indicator light to display green; and when the position state is tripping, driving the indicator light to display red.

[0025] Optionally, the step of controlling the switch tube driving circuit according to the switch state to adjust the coil excitation current to prevent burning includes:

[0026] When the current error value is in a preset hysteresis width interval, the first switch tube and the third switch tube in the switch tube driving circuit are simultaneously turned on to apply a 0-state voltage to the coil, so as to attenuate the coil current.

[0027] The application further provides a relay protection hard panel intelligent control device applied to an embedded hard panel driving control system, wherein the embedded hard panel driving control system comprises a current sensor and a switch tube driving circuit, and the device comprises:

[0028] an acquisition module configured to acquire a coil current value, wherein the coil current value is collected by the current sensor;

[0029] an error module configured to determine a current error value according to the coil current value and a preset reference current value;

[0030] a rule module configured to determine a switch state according to the current error value and a preset switch state table, wherein the preset switch state table comprises a plurality of switch state rules, and each switch state rule corresponds to a current error range;

[0031] a control module configured to control the switch tube driving circuit according to the switch state to adjust the coil excitation current to prevent burning.

[0032] The application further provides an electronic device comprising a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the method.

[0033] The application further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed in a computer to make the computer execute the method.

[0034] The application has the following beneficial effects:

[0035] The application provides a relay protection hard pressboard intelligent control method, which is applied to an embedded hard pressboard drive control system, and the embedded hard pressboard drive control system comprises a current sensor and a switch tube drive circuit. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a relay protection hard pressboard intelligent control schematic diagram in the application;

[0037] Figure 2 is a relay protection hard pressboard intelligent automatic switching device schematic diagram in the application. DETAILED DESCRIPTION

[0038] Exemplary embodiments of the present disclosure will be described in greater detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it is understood that various forms implement the present disclosure and should not be limited by the embodiments set forth herein. On the contrary, the embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0039] Please refer to Figure 1 The application provides a relay protection hard pressboard intelligent control method, which is applied to an embedded hard pressboard drive control system, and the system comprises a current sensor and a switch tube drive circuit.

[0040] S101, acquiring a coil current value, wherein the coil current value is collected by the current sensor;

[0041] In the embedded hard pressboard drive control system, the current sensor real-time collects the current of the coil to obtain the coil current value . The process of acquiring the coil current value specifically comprises that the output signal of the current sensor is input to the embedded drive control system, and the system reads the current value through a built-in analog-to-digital converter. The current sensor The current sensor is installed in the drive circuit to monitor the real-time current change of the excitation coil, ensuring the accuracy and reliability of the current data.

[0042] During the operation of the hard press plate, the current sensor continuously samples the coil current to avoid control failure caused by current fluctuations. It ensures real-time capture of the coil current and provides basic input for subsequent control.

[0043] Further, in the above-mentioned embedded hard press plate drive control system, the current sensor real-time acquisition of coil current, get coil current value .

[0044] As shown in the structure of the embedded hard press plate drive control system, Figure 2 shows the specific components of the system, including the current sensor Figure 2 and the full-bridge topology connection mode of the switch tube drive circuit.

[0045] S102, according to the coil current value and the preset reference current value, determine the current error value;

[0046] Determine the current error value, including comparing the coil current value and the preset reference current value .

[0047] The preset reference current value is set according to the received action instruction: when the action instruction is a closing instruction, set to a positive current value; when the action instruction is a tripping instruction, set to a negative current value.

[0048] The embedded drive control system performs a comparison operation to calculate the current error value:

[0049]

[0050] Among them, the actual current and the target current deviation value.

[0051] This comparison process ensures that the error value reflects the current tracking state, providing a basis for switch state selection.

[0052] For example, in the hard press plate tripping operation, set to a negative value, the system real-time calculation to monitor the reverse current change.

[0053] Further, the actual current and the target current deviation value also includes: ​

[0054] current error value is in the range of to , which is determined based on the maximum current capacity of the hard-plate coil.

[0055] S103, determining a switching state according to the current error value and a preset switching state table, the preset switching state table comprising a plurality of switching state rules, each of the switching state rules corresponding to a current error range;

[0056] The preset switching state table is stored in the embedded drive control system and comprises a plurality of switching state rules, each of the rules corresponding to a specific current error range.

[0057] The switching state rule is specifically:

[0058] 1. When the current error value , drive the first switch tube and the fourth switch tube to be conductive;

[0059] 2. When the current error value is within the hysteresis width, i.e. , drive the first switch tube and the third switch tube to be conductive; when the current error value , drive the second switch tube and the third switch tube to be conductive. Wherein, is the lower limit of the current hysteresis width, is the upper limit of the current hysteresis width.

[0060] 3. When within the hysteresis width, apply a 0-state voltage to the coil, and realize it by driving and to be conductive, so that the coil current slowly decreases, preventing the coil from overheating and burning out.

[0061] The process of determining the switching state is based on the current error range to query the preset table, ensuring that the switch tube state matches the control requirements. For example, when enters the hysteresis interval, the system switches to the 0-state voltage mode to avoid current mutation.

[0062] Further, in the above-mentioned when within the hysteresis width, apply a 0-state voltage to the coil, and realize it by driving and to be conductive, so that the coil current slowly decreases, preventing the coil from overheating and burning out, further comprising:

[0063] Set the interval lower limit of the hysteresis width as , and the interval upper limit as , the hysteresis width value is obtained from experimental data. Further, the experiment includes dynamically adjusting the current error value according to the electrical characteristics of the hard-pressed plate coil , , for example, by a system calibration program based on the rated current of the coil and the temperature characteristics to determine the upper limit and the lower limit . In one embodiment, the hysteresis width setting ensures that the current error value fluctuates within a controllable range, avoiding sudden changes in current.

[0064] Further, when the current error value is within the hysteresis width, i.e. , the driving of the first switch tube and the third switch tube is turned on, which further includes:

[0065] The conduction connection mode of and in the full-bridge topology is specifically shown in Figure 2 , which ensures the realization of 0-state voltage.

[0066] S104, according to the switching state control, the switch tube driving circuit is adjusted to prevent burnout.

[0067] The control switch tube driving circuit includes adjusting the coil excitation current according to the determined switching state to prevent burnout.

[0068] The switch tube driving circuit adopts full-bridge topology, including first switch tube , second switch tube , third switch tube and fourth switch tube .

[0069] The adjustment process is specifically: in the closing action, when the error , and drive and to turn on, the forward coil current rises rapidly;

[0070] When , and drive and to turn on, 0-state voltage is applied to make the current slowly decrease;

[0071] When , and drive and to turn on, forcing the current to rapidly decrease.

[0072] In the opening action, set the reverse reference current, when , and drive and conduction, the reverse current rises quickly;

[0073] When , and drive and conduction, the 0 state voltage is applied to make the current slowly decrease;

[0074] When , and drive and conduction, forcing the current to quickly decrease.

[0075] The control ensures that the coil current quickly tracks the reference current, preventing the field coil from burning out. The action instruction signal comes from the status button detection circuit of the hard pressure plate indicator button integrated switch or the upper computer connected through the communication interface. For example, the upper computer sends instructions through RS-485 communication, and the system sets the reference current direction according to the instructions.

[0076] Further, in the above-mentioned switch tube driving circuit adopts full-bridge topology, including first switch tube , second switch tube , third switch tube and fourth switch tube , also includes:

[0077] The specific wiring mode of full-bridge topology is: the first switch tube is connected to the positive end of the coil, the second switch tube is connected to the negative end of the coil, the third switch tube and the fourth switch tube are connected to the ground terminal respectively.

[0078] Further, in the above-mentioned control ensures that the coil current quickly tracks the reference current, preventing the field coil from burning out, further comprising:

[0079] The mechanism to prevent burning out also includes triggering the protection mechanism when the coil current abnormally rises, which is realized by the software program of the embedded driving control system.

[0080] Receive action instruction signal; when the action instruction signal is opening instruction, set the preset reference current value to reverse current value; when the action instruction signal is closing instruction, set the preset reference current value to positive current value.

[0081] The embedded hard pressure plate drive control system receives an action instruction signal, which is sent by the state button detection circuit of the hard pressure plate indicator light button integrated switch or the upper computer connected through the RS-485 communication interface. When the action instruction is a tripping instruction, the preset reference current value is set to a reverse current value; when the action instruction is a closing instruction, the preset reference current value is set to a forward current value. The receiving process includes that the state button detection circuit or the upper computer communication module inputs the signal into the control system, the system analyzes the instruction type and sets the reference value. For example, the button point operation triggers the detection circuit to output a signal, and the control system updates the reference current direction accordingly. The receiving process includes that the state button detection circuit or the upper computer communication module inputs the signal into the control system, the system analyzes the instruction type and sets the reference value. For example, the button point operation triggers the detection circuit to output a signal, and the control system updates the reference current direction accordingly.

[0082] The auxiliary contact of the operating mechanism is used to obtain the position state of the hard pressure plate; when the position state is closing, the drive indicator light displays green, and the indicator light in the upper computer interface displays green; when the position state is tripping, the drive indicator light displays red, and the indicator light in the upper computer interface displays red.

[0083] The auxiliary contact of the operating mechanism is used to obtain the position state of the hard pressure plate; when the position state is closing, the drive indicator light displays green, and the indicator light in the upper computer interface displays green; when the position state is tripping, the drive indicator light displays red, and the indicator light in the upper computer interface displays red. The auxiliary contact of the operating mechanism is used to obtain the position state of the hard pressure plate; when the position state is closing, the drive indicator light displays green, and the indicator light in the upper computer interface displays green; when the position state is tripping, the drive indicator light displays red, and the indicator light in the upper computer interface displays red. The auxiliary contact of the operating mechanism is used to obtain the position state of the hard pressure plate; when the position state is closing, the drive indicator light displays green, and the indicator light in the upper computer interface displays green; when the position state is tripping, the drive indicator light displays red, and the indicator light in the upper computer interface displays red.

[0084] The application also provides a relay protection hard pressure plate intelligent control device applied to an embedded hard pressure plate drive control system, wherein the embedded hard pressure plate drive control system comprises a current sensor and a switch tube drive circuit, and the device comprises:

[0085] an acquisition module, which acquires a coil current value, wherein the coil current value is collected by the current sensor;

[0086] an error module, which determines a current error value according to the coil current value and a preset reference current value;

[0087] a rule module, which determines a switch state according to the current error value and a preset switch state table, wherein the preset switch state table comprises a plurality of switch state rules, and each switch state rule corresponds to a current error range;

[0088] a control module, which controls the switch tube drive circuit according to the switch state, so as to adjust the coil excitation current and prevent burning. ​

[0089] like Figure 2 As shown, the embedded hard plate drive control system includes a current sensor. and the switching transistor drive circuit, wherein the acquisition module comprises a current sensor The sensor employs a Hall effect design, with its output connected to the input pin of the analog-to-digital converter in the microprocessor. It acquires the coil current value in real time via the SPI communication protocol. The error module, integrated within the microprocessor, uses a hardware comparator unit to subtract the coil current value from a preset reference current value, outputting the current error value. Both the rule module and the control module are implemented based on the software logic of the microprocessor. The rule module stores a preset switch state table in Flash memory, and the control module drives the switching transistors of the full-bridge topology via GPIO pins. This application also provides an electronic device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements the method described above.

[0090] This application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed in a computer, causes the computer to perform the above-described method.

[0091] The above description of the embodiments is provided to enable those skilled in the art to understand and apply this application. Those skilled in the art will readily make various modifications to the above embodiments and apply the general principles described herein to other embodiments without inventive effort. Therefore, this application is not limited to the above embodiments, and any improvements and modifications made to this application based on the disclosure thereof should be within the scope of protection of this application.

Claims

1. A method for intelligent control of a hardboard relay protection, characterized in that, The method is applied to an embedded hard pressure plate driving control system, the embedded hard pressure plate driving control system comprises a current sensor and a switch tube driving circuit, and the method comprises the following steps: Obtaining a coil current value, wherein the coil current value is collected by the current sensor; Determining a current error value according to the coil current value and a preset reference current value; Determining a switch state according to the current error value and a preset switch state table, wherein the preset switch state table comprises a plurality of switch state rules, and each switch state rule corresponds to a current error range; Controlling the switch tube driving circuit according to the switch state to adjust the coil excitation current to prevent burning, wherein the switch tube driving circuit comprises a full-bridge topology, the full-bridge topology comprises a first switch tube, a second switch tube, a third switch tube and a fourth switch tube, and the switch state rule comprises: when the current error value is less than 0, the first switch tube and the fourth switch tube are driven to be turned on; when the current error value is within a hysteresis width, the first switch tube and the third switch tube are driven to be turned on to apply a 0-state voltage to the coil to make the coil current decay; and when the current error value is greater than an upper limit of the hysteresis width, the second switch tube and the third switch tube are driven to be turned on.

2. The method of claim 1, wherein, The step of controlling the switch tube driving circuit according to the switch state comprises: when the current error value is within the hysteresis width, a 0-state voltage is applied to the coil.

3. The method of claim 1, wherein, The step of determining the current error value according to the coil current value and the preset reference current value comprises the following steps: Receiving an action instruction signal; When the action instruction signal is a tripping instruction, setting the preset reference current value as a reverse current value; When the action instruction signal is a closing instruction, setting the preset reference current value as a forward current value.

4. The method of claim 3, wherein, The action instruction signal comprises: being sent by a state button detection circuit of a hard pressure plate indicator light button integrated switch, or being sent by an upper computer connected through a communication interface.

5. The method of claim 4, wherein, The indicator light of the hard pressure plate indicator light button integrated switch displays different colors according to the position state of the hard pressure plate, comprising the following steps: Obtaining the position state of the hard pressure plate through auxiliary contacts of an operating mechanism; When the position state is closing, driving the indicator light to display green; and when the position state is tripping, driving the indicator light to display red.

6. A relay protection hard panel intelligent control device, characterized in that, The device is applied to an embedded hard pressure plate driving control system, the embedded hard pressure plate driving control system comprises a current sensor and a switch tube driving circuit, and the device comprises the following steps: An obtaining module is configured to obtain a coil current value, wherein the coil current value is collected by the current sensor; An error module is configured to determine a current error value according to the coil current value and a preset reference current value; A rule module is configured to determine a switch state according to the current error value and a preset switch state table, wherein the preset switch state table comprises a plurality of switch state rules, and each switch state rule corresponds to a current error range; and A control module is configured to control the switch tube driving circuit according to the switch state to adjust the coil excitation current to prevent burning. The control module controls the switch tube driving circuit according to the switch state to adjust the coil excitation current to prevent burning, wherein the switch tube driving circuit comprises a full-bridge topology; the full-bridge topology comprises a first switch tube, a second switch tube, a third switch tube and a fourth switch tube; the switch state rule comprises: when the current error value is less than 0, the first switch tube and the fourth switch tube are driven to be turned on; when the current error value is within a hysteresis width, the first switch tube and the third switch tube are driven to be turned on, 0-state voltage is applied to the coil, and the coil current is attenuated; when the current error value is greater than the upper limit of the hysteresis width, the second switch tube and the third switch tube are driven to be turned on.

7. An electronic device, comprising: A computer program product comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the method of any one of claims 1-5 when executing the computer program.

8. A computer-readable storage medium, characterized in that, A computer program product comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the method of any one of claims 1-5 when executing the computer program.

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