Remote locking system for primary and secondary integrated on-column circuit breaker distribution device

Abstract

This invention belongs to the field of switchgear control technology for power supply or distribution, and relates to a remote control interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device. The system includes a data communication unit, a status calculation unit, and an output interception unit. After the status calculation unit determines that the remote control action command is valid, it locks the output interception unit, collects the real-time terminal voltage of the energy storage capacitor, and extracts the timestamp of the previous disconnection action. Based on the mapping relationship between ambient temperature and threshold values, it determines the voltage threshold and the dielectric recovery time threshold. When the real-time terminal voltage is greater than the voltage threshold and the time difference is greater than the dielectric recovery time threshold, it outputs an unlocking level to the operating coil circuit to complete the electrical interlocking action. This invention utilizes the operating energy saturation and insulation recovery time-domain characteristics to construct an electrical-physical interception mechanism within the distribution device, eliminating the spatiotemporal misalignment between command issuance and physical state recovery, avoiding the risk of mechanism jamming and contact burnout, and ensuring the deterministic operation of the switchgear under extreme conditions.

Description

Technical Field

[0001] This invention belongs to the field of switch control technology for power supply or distribution, and particularly relates to a remote interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device. Background Technology

[0002] With the development of power distribution automation technology, integrated pole-mounted circuit breakers, which combine primary and secondary circuits, are widely used as important switching devices for power supply or distribution at overhead line nodes in power distribution networks. Existing remote control interlocking systems mostly rely on message verification at the remote control protocol level and combine the steady-state logic word feedback from auxiliary contacts to determine whether to connect the drive circuit of the primary operating mechanism. They lack a low-level electrical interlocking circuit layout based on the physical state of the primary equipment.

[0003] However, under complex operating conditions such as high-frequency dispatching or rapid reclosing in power distribution networks, the aforementioned conventional technical approach implicitly relies on unstable engineering premises. This premise assumes that the primary equipment must possess the physical conditions for safe operation when the secondary logic verification passes. In actual operation, the transmission of secondary remote control commands has millisecond-level characteristics, while the charging process of the energy storage capacitor in the primary circuit breaker operating mechanism and the recovery process of the insulation dielectric strength after the vacuum interrupter breaks have objective physical delays on the order of hundreds of milliseconds. This mismatch between the command issuance rate and the underlying physical state recovery rate makes it highly susceptible to problems when the secondary terminal operates before the primary mechanism has sufficient mechanical energy or the insulation... When the medium is not yet restored and the physical condition is suboptimal, the circuit breaker is connected. This kind of underlying physical constraint directly leads to the jamming of the circuit breaker operating mechanism, slow closing and burning of moving and stationary contacts, or even re-ignition and explosion of the arc-extinguishing chamber, which constitutes an operational hazard that urgently needs to be addressed in power distribution switchgear. The industry has tried to cover the equipment recovery cycle by setting a fixed time setpoint, but this static approach is difficult to balance safety and dispatch efficiency when facing a dynamically fluctuating power distribution environment. If the setpoint is set too short, physical safety under extreme conditions cannot be guaranteed; if the setpoint is set too long, it will limit the flexibility of power grid fault recovery and lead to a structural shrinkage in the system's control capabilities.

[0004] Therefore, how to establish a dynamic blocking mechanism based on the intrinsic physical energy state of primary equipment and the time-domain characteristics of insulation recovery, and ensure deep coupling between the issuance of remote control commands and the physical execution capability of the switch body, has become the technical problem to be solved by this invention. Summary of the Invention

[0005] The present invention aims to solve the problem of reduced safety of switching actions caused by the misalignment in the time dimension between the physical energy state of the primary device and the secondary remote control command stream.

[0006] In this technical solution, a remote interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device includes: The data communication unit is used to receive remote control commands. The outlet interception unit is connected in series in the operating coil circuit of the pole-mounted circuit breaker and is used to control the electrical on / off state of the operating coil circuit. The status calculation unit is connected to both the data communication unit and the exit interception unit. The status calculation unit collects the real-time terminal voltage of the energy storage capacitor in the pole-mounted circuit breaker's operating mechanism and extracts the timestamp of the previous disconnection action recorded in the internal register. The status calculation unit pre-stores a mapping table between ambient temperature and threshold values. It also acquires the ambient temperature and determines the voltage threshold and dielectric recovery time threshold corresponding to the real-time terminal voltage based on the mapping table. After determining that the remote control action command is valid, the status calculation unit locks the exit interception unit and collects the current real-time terminal voltage. When the real-time terminal voltage is greater than the voltage threshold, and the difference between the current system time and the timestamp of the previous disconnection action is greater than the dielectric recovery time threshold, the status calculation unit releases the lock on the exit interception unit and outputs an unlock level to the operating coil circuit. If the real-time terminal voltage is less than or equal to the voltage threshold, or the difference is less than or equal to the dielectric recovery time threshold, the status calculation unit maintains the disconnected state of the exit interception unit and generates a blocking message containing the real-time terminal voltage and the difference.

[0007] Preferably, the state operation unit verifies the sampling validity before outputting the unlock level, including the following steps: within a 500μs time window after receiving the remote control action command, the energy storage capacitor is sampled for a secondary voltage to obtain the secondary voltage sample value; the rate of change of the secondary voltage sample value relative to the real-time terminal voltage is calculated; when the rate of change is within the preset physical capacitor natural discharge slope range, the real-time terminal voltage is determined to be valid and the unlock level is output; when the rate of change exceeds the physical capacitor natural discharge slope range, transient interference noise is determined to exist and the locked state of the exit interception unit is maintained.

[0008] Preferably, the mapping table records the physical correction coefficients corresponding to different temperature ranges; the state operation unit performs numerical compensation on the voltage threshold through the physical correction coefficients to offset the charge density drift of the energy storage capacitor under changes in ambient temperature.

[0009] Preferably, the exit interception unit includes a logic drive module and a physical gating circuit connected in series; the physical gating circuit is provided with a Zener diode; the breakdown voltage of the Zener diode is set to 0.95 to 1.05 times the voltage threshold, and is used to forcibly disconnect the operation coil circuit when the real-time terminal voltage is lower than the breakdown voltage.

[0010] Preferably, the data communication unit is also used to monitor the communication error rate; when the error rate exceeds 1% within a preset statistical period, the status calculation unit increases the voltage threshold to 1.1 times the original value.

[0011] Preferably, the system further includes a bus voltage transformer; the bus voltage transformer is connected to the status calculation unit and outputs bus voltage data; the status calculation unit adjusts the output pulse width of the unlocking level according to the voltage difference ratio between the bus voltage data and the real-time terminal voltage.

[0012] Preferably, the exit interception unit includes an opto-isolation module; the output of the logic drive module is coupled to the operation coil circuit through the opto-isolation module to isolate the secondary logic circuit from the primary high-voltage circuit.

[0013] Preferably, the status calculation unit identifies the sub-health state of the hardware by calculating the voltage recovery rate of the energy storage capacitor after the disconnection action in real time; when the voltage recovery rate is lower than the preset slope benchmark for three consecutive working cycles, the status calculation unit outputs a device maintenance signal and blocks the output interception unit.

[0014] Preferably, the data communication unit is also used to upload the blocking message to the distribution network dispatch master station; the blocking message includes the physical parameter category that triggers the blocking, the real-time terminal voltage, and the numerical deviation of the real-time terminal voltage relative to the voltage threshold.

[0015] Compared with existing technologies, the remote control interlocking system for integrated primary and secondary pole-mounted circuit breaker distribution equipment of the present invention has the following advantages: 1. In the remote control interlocking of primary and secondary integrated pole-mounted circuit breaker distribution equipment, a physical interception mechanism based on the saturation of operating energy is established, forming an interlocking circuit arrangement suitable for integrated power distribution switchgear. By monitoring the terminal voltage of the energy storage capacitor of the operating mechanism in real time, the virtual remote control closing command is forcibly constrained within the physical boundary with the functioning capability. This changes the limitation of traditional technology that relies solely on logic state bits for interlocking. Since voltage sampling and logic judgment directly affect the energy source of the primary equipment, the system can dynamically lock or release the closing circuit according to the actual charge state of the energy storage component. This eliminates the spatiotemporal misalignment between the issuance of the remote control command and the energy accumulation process of the operating mechanism, avoiding slow closing of moving and stationary contacts caused by the circuit breaker attempting to operate under energy shortage and the resulting contact burnout.

[0016] 2. The patent application proposes to construct an insulation safety zone for the arc-extinguishing chamber that is synchronized with the physical recovery cycle by introducing a differential correlation between the interruption action timestamp and the real-time system clock. The state calculation unit automatically calculates the strength recovery progress of the vacuum arc-extinguishing medium based on the absolute time record of the last action. When a high-frequency reclosing or continuous remote control command is received, the system intercepts the erroneous closing operation before the insulation strength of the medium reaches the standard through mandatory time dimension constraints. This dynamic gating mechanism based on the physical time constant, combined with the verification of the energy storage voltage, forms a two-dimensional safety protection closed link, effectively avoiding the explosion risk caused by the arc-extinguishing chamber reignition and ensuring the deterministic operation of the switchgear under complex scheduling conditions.

[0017] 3. The patent application scheme utilizes environmental temperature compensation logic to correct the interlocking threshold in real time, enabling the switching device to adapt to extreme outdoor conditions. The system extracts the environmental temperature parameters inside the device, calls the preset physical characteristic mapping relationship, and automatically adjusts the safety energy storage voltage and the judgment benchmark of the medium recovery time. This collaborative logic takes into account the viscosity of lubricating grease at low temperatures and the thermal drift law of insulating medium at high temperatures, so that the interlocking boundary always fits the actual physical performance curve of the primary equipment. This dynamic compensation mechanism, achieved through the reorganization of internal known parameters, improves the operational robustness of the power distribution device in cold or hot environments without the need to add external sensing and detection components, ensuring that the interlocking judgment is neither falsely activated nor refused to activate. Attached Figure Description

[0018] Figure 1 This is a flowchart of the multi-source data collaboration and core control process of the primary and secondary integrated pole-mounted circuit breaker power distribution device remote control interlocking system of the present invention. Figure 2 This is a diagram showing the dynamic operating status and triggering conditions of the remote control interlocking system for the primary and secondary integrated pole-mounted circuit breaker power distribution device of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] It should be noted that all directional and positional terms used in this invention, such as: up, down, left, right, front, back, vertical, horizontal, inner, outer, top, bottom, transverse, longitudinal, center, etc., are only used to explain the relative positional relationship and connection between components in a specific state (as shown in the accompanying drawings). They are only for the convenience of describing this invention and do not require that this invention be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention. In addition, the descriptions of "first," "second," etc., in this invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0021] In the description of this invention, unless otherwise explicitly specified and limited, the terms installation, connection, and linking should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0022] In the description of this specification, references to the terms "an embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example, and the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0023] A remote interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device includes: The data communication unit is used to receive remote control commands. The outlet interception unit is connected in series in the operating coil circuit of the pole-mounted circuit breaker and is used to control the electrical on / off state of the operating coil circuit. The status calculation unit is connected to both the data communication unit and the exit interception unit. The status calculation unit collects the real-time terminal voltage of the energy storage capacitor in the pole-mounted circuit breaker's operating mechanism and extracts the timestamp of the previous disconnection action recorded in the internal register. The status calculation unit pre-stores a mapping table between ambient temperature and threshold values. It also acquires the ambient temperature and determines the voltage threshold and dielectric recovery time threshold corresponding to the real-time terminal voltage based on the mapping table. After determining that the remote control action command is valid, the status calculation unit locks the exit interception unit and collects the current real-time terminal voltage. When the real-time terminal voltage is greater than the voltage threshold, and the difference between the current system time and the timestamp of the previous disconnection action is greater than the dielectric recovery time threshold, the status calculation unit releases the lock on the exit interception unit and outputs an unlock level to the operating coil circuit. If the real-time terminal voltage is less than or equal to the voltage threshold, or the difference is less than or equal to the dielectric recovery time threshold, the status calculation unit maintains the disconnected state of the exit interception unit and generates a blocking message containing the real-time terminal voltage and the difference.

[0024] Preferably, the state operation unit verifies the sampling validity before outputting the unlock level, including the following steps: within a 500μs time window after receiving the remote control action command, the energy storage capacitor is sampled for a secondary voltage to obtain the secondary voltage sample value; the rate of change of the secondary voltage sample value relative to the real-time terminal voltage is calculated; when the rate of change is within the preset physical capacitor natural discharge slope range, the real-time terminal voltage is determined to be valid and the unlock level is output; when the rate of change exceeds the physical capacitor natural discharge slope range, transient interference noise is determined to exist and the locked state of the exit interception unit is maintained.

[0025] Preferably, the mapping table records the physical correction coefficients corresponding to different temperature ranges; the state operation unit performs numerical compensation on the voltage threshold through the physical correction coefficients to offset the charge density drift of the energy storage capacitor under changes in ambient temperature.

[0026] Preferably, the exit interception unit includes a logic drive module and a physical gating circuit connected in series; the physical gating circuit is provided with a Zener diode; the breakdown voltage of the Zener diode is set to 0.95 to 1.05 times the voltage threshold, and is used to forcibly disconnect the operation coil circuit when the real-time terminal voltage is lower than the breakdown voltage.

[0027] Preferably, the data communication unit is also used to monitor the communication error rate; when the error rate exceeds 1% within a preset statistical period, the status calculation unit increases the voltage threshold to 1.1 times the original value.

[0028] Preferably, the system further includes a bus voltage transformer; the bus voltage transformer is connected to the status calculation unit and outputs bus voltage data; the status calculation unit adjusts the output pulse width of the unlocking level according to the voltage difference ratio between the bus voltage data and the real-time terminal voltage.

[0029] Preferably, the exit interception unit includes an opto-isolation module; the output of the logic drive module is coupled to the operation coil circuit through the opto-isolation module to isolate the secondary logic circuit from the primary high-voltage circuit.

[0030] Preferably, the status calculation unit identifies the sub-health state of the hardware by calculating the voltage recovery rate of the energy storage capacitor after the disconnection action in real time; when the voltage recovery rate is lower than the preset slope benchmark for three consecutive working cycles, the status calculation unit outputs a device maintenance signal and blocks the output interception unit.

[0031] Preferably, the data communication unit is also used to upload the blocking message to the distribution network dispatch master station; the blocking message includes the physical parameter category that triggers the blocking, the real-time terminal voltage, and the numerical deviation of the real-time terminal voltage relative to the voltage threshold.

[0032] Example 1: In the application scenario where overhead power lines of the distribution network are affected by a cold wave and accompanied by high-frequency transient faults, the dispatch center issues a remote closing command to restore power supply to the disaster area. The primary and secondary integrated pole-mounted circuit breaker distribution device deployed at this node needs to continuously respond to the command. Since the ambient temperature is below 20°C, the charge accumulation speed of the energy storage capacitor in the circuit breaker operating mechanism is slowed down due to the reduction in physical activity. In addition, the vacuum interrupter experiences physical lag in the process of restoring the insulation strength of the dielectric after the interruption of the preceding fault current. If the system directly drives the operating coil circuit, it is easy to cause the operating mechanism to operate in a sub-healthy state with insufficient energy or fragile dielectric, resulting in the risk of arc burnout caused by slow closing of moving and stationary contacts or reignition of the interrupter.

[0033] To address the safety hazards arising from the spatiotemporal misalignment between the command issuance rate and the underlying physical state recovery rate, the remote interlocking system for the integrated primary and secondary pole-mounted circuit breaker distribution unit, upon receiving a remote closing message, locks the output interception unit in its state calculation unit, interrupts the electrical conduction of the operation coil circuit, and simultaneously acquires the real-time terminal voltage of the energy storage capacitor. Extract the timestamp of the previous segmentation action recorded in the internal register. Simultaneously, the internal ambient temperature of the device is obtained through an ambient temperature sensor, and the state calculation unit retrieves a pre-stored mapping table of ambient temperature and threshold values ​​to determine the voltage threshold corresponding to the current temperature range. and media recovery time threshold ,in This represents the real-time potential difference across the energy storage capacitor. This is the system clock value corresponding to the last contact break time. The minimum operating voltage required to ensure reliable closing of the circuit breaker. The minimum time interval required for the arc-extinguishing chamber to reach the insulation strength recovery standard.

[0034] To suppress signal sampling distortion caused by strong outdoor electromagnetic interference, the state processing unit performs secondary voltage sampling on the energy storage capacitor within a 500μs time window after receiving the remote control action command to obtain the secondary voltage sample value, and calculates the secondary voltage sample value relative to the real-time terminal voltage. The rate of change of the physical capacitor is used to determine the real-time terminal voltage when the rate of change is within the preset range of the natural discharge slope of the physical capacitor. Sampling is valid; the state operation unit calculates the current system time. Timestamp of the previous segment action The difference, when the real-time terminal voltage Greater than the voltage threshold And the difference is greater than the media recovery time threshold. At this time, the state operation unit unlocks the outlet interception unit and outputs an unlock level to the operation coil circuit to connect the drive power supply, so that the contacts close at the rated speed, thereby avoiding contact adhesion caused by insufficient energy and equipment explosion caused by insulation failure, and constraining the virtual remote control command execution right to the actual physical action capability boundary of the primary equipment.

[0035] Example 2: In the test verifying the physical interception characteristics and environmental adaptability of the remote control interlocking system of the integrated primary and secondary pole-mounted circuit breaker distribution device, a controlled physical environment was constructed using a high-voltage switch dynamic characteristic test platform. This platform has a voltage acquisition channel with a measurement resolution better than 0.1V and a clock recording device with an accuracy better than 0.05ms. The test data comes from the platform's real-time sampling of the operating mechanism under different temperature gradients. To simulate the complex interference conditions of outdoor distribution networks, random noise with a signal-to-noise ratio of 20dB is actively superimposed on the acquisition link, and a power frequency induced voltage with a peak amplitude of 100V is simulated to observe the sampling stability of the system under non-ideal physical environments. Regarding the differential sampling time window width parameter, its set value is 500μs. The decision logic for selecting this value is to balance the reliability of signal recognition and the delay of command action. If this parameter is set too low, it cannot cover the complete integration period of the energy storage capacitor's natural discharge characteristics, resulting in the inability to distinguish between real voltage drops and transient noise pulses. If this parameter is set too high, it will increase the logic processing time of the secondary terminal and reduce the scheduling response rate of the switching device. Calibration data shows that under the condition of sampling frequency of 10kHz, selecting a window width of 500μs can make the calculation of voltage integral gradient statistically significant, thereby stably eliminating pseudo-state interference generated by transient electromagnetic pulses.

[0036] The comparative test was divided into a control group and an experimental group. The control group adopted a conventional control method relying on communication verification and position contact feedback, while the experimental group adopted a remote control interlocking system with a physical gate control circuit. The test was conducted in a standard temperature environment of 25℃. Both the control group and the experimental group directly connected the outlet after receiving the command, and the average contact speed was maintained at 98.5% of the rated speed, and the contact arcing time was stable at 8.2ms. The ambient temperature was adjusted to -20℃, and the extreme state of the arc-extinguishing chamber insulation medium not being fully restored due to high-frequency reclosing was simulated. After receiving the closing command, the control group directly drove the operating coil circuit to operate. Due to the decrease in charge density of the energy storage capacitor of the circuit breaker operating mechanism at low temperature, the contact closing speed was reduced to 72.4% of the rated value. The generated mechanical kinetic energy was insufficient to suppress the pre-breakdown process in the initial stage of closing, which caused the arcing time to be extended to 24.8ms, and arc burn marks appeared on the contact surface.

[0037] Under environmental interference conditions of -20℃ and insufficient dielectric recovery time, the test group exhibited physical interception characteristics. Upon receiving the closing command, the real-time terminal voltage... The sampled value is 185.6V, which is lower than the voltage threshold after compensation by the temperature correction factor. That is, 210.5V, the state operation unit maintains the electrical disconnect state of the output interception unit, and the command is forcibly suspended; after continuous charging to 142.6ms, the real-time terminal voltage The voltage has increased to 212.3V, and the current system time... Timestamp of the previous segment action The difference reached 505.2ms, exceeding the preset media recovery time threshold. That is, at 500.0 ms, the system output unlock level, and the final measured contact closing speed recovered to 97.1% of the rated value, and the arcing time was shortened to 8.5 ms. This result confirms the inhibitory effect of the physical gating circuit on the risk of mechanical performance degradation and insulation failure; data analysis shows that when the real-time terminal voltage Relative voltage threshold When the deficit ratio reaches more than 15%, the initial closing speed and energy saturation show a non-linear positive correlation trend, constituting a performance inflection point. If the operating voltage is lower than this critical point, the closing energy will drop precipitously, causing the moving and stationary contacts to stop midway. This verification confirms that by establishing a two-dimensional gating boundary based on native physical parameters, the safety of the switchgear operation is transformed from probabilistic guarantee to causal determinism, thus achieving performance optimization of the safe operation mode of the distribution panel and switchgear.

[0038] Example 3: This example combines Figures 1 to 2 Description of the remote control interlocking system for the integrated primary and secondary pole-mounted circuit breaker distribution equipment, such as... Figure 1 As shown, after the remote control action command is issued, it reaches the data communication unit to receive the remote control action command and transmit the command to the state calculation core logic for judgment. At the same time, the ambient temperature is determined by obtaining the mapping table between the ambient temperature and the threshold to determine the voltage threshold and the medium recovery time threshold, and the reference mapping is output. The energy storage capacitor and internal register in the operating mechanism serve as data sources for the physical feature extraction logic to collect the real-time terminal voltage and extract the timestamp of the previous interruption action, and output physical parameters. The above command transmission, reference mapping and physical parameters are combined into the state calculation core logic for judgment. The state calculation core logic judgment includes: 1. Determining that the remote control action command is valid; 2. Real-time terminal voltage > voltage threshold; 3. The difference between the current system time and the timestamp of the previous interruption action > medium recovery time threshold. When the condition is not met: maintaining the disconnected state, the blocking message contains the real-time terminal voltage and the difference. When the condition is met: unlocking and outputting the unlock level, the electrical on / off of the operating coil circuit is controlled by the exit interception unit, and finally the operating coil circuit is acted upon through electrical interlocking.

[0039] like Figure 2As shown, the system enters a silent state triggered by the initial graphic element. If the voltage rise rate is lower than the preset slope benchmark for three consecutive working cycles in the silent state, it enters a sub-health state and triggers the output device maintenance signal within the dashed box, locking the exit interception unit. In the silent state, after the remote control action command is deemed valid, it transitions to a locked state. If the rate of change exceeds the natural discharge slope range of the physical capacitor while in the locked state, it remains locked. If the real-time terminal voltage is less than or equal to the voltage threshold or the difference is less than or equal to the dielectric recovery time threshold while in the locked state, it transitions to a disconnected state and triggers the action within the dashed box to generate a lockout message containing the real-time terminal voltage and the difference. If the real-time terminal voltage is greater than the voltage threshold and the difference between the current system time and the timestamp of the previous disconnection action is greater than the dielectric recovery time threshold while in the locked state, it transitions to completing the electrical interlock action and triggers the action within the dashed box to send the output unlock level to the operation coil circuit.

[0040] Example 4: In applications where overhead power lines are subjected to lightning surges and the switching equipment is in its later stages of service, the integrated primary and secondary pole-mounted circuit breaker distribution system needs to handle malfunction signals caused by induced voltage interference in the secondary logic circuit and overcome the degradation of vacuum interruptor contact performance due to repeated short-circuit current interruption. Under these conditions, when the data communication unit receives an external command message, before performing any physical isolation or electrical parameter verification, the state operation unit performs deep analysis of the control field of the received message, extracts the embedded message authentication code, and calls a pre-set security encryption chip to execute symmetric decryption and hash verification algorithms. Only when the message source address is confirmed to be legitimate, the time stamp anti-replay verification is passed, and the ciphertext sequence completely matches the local master station key, can the remote control command be officially deemed legitimate, thereby cutting off the risk of malicious forgery and illegal intrusion at the network layer. Considering the aforementioned electromagnetic environment and equipment aging constraints, after determining the remote control command to be legitimate, the state operation unit locks the output interception unit and initiates a real-time voltage check on the energy storage capacitor. The verification process involves continuously acquiring 10 voltage data points at 50μs sampling intervals using a high-precision analog-to-digital converter, denoted as the sequence. ,in The state operation unit calculates the differential increment between adjacent points of the sequence, which is an integer from 1 to 10, and calculates the voltage drop slope operator using the following formula. Where k is the voltage drop slope operator characterizing the voltage change trend, and N is the total number of sampling points, i.e., 10. The sampling time interval is 50 μs. The voltage value corresponds to the i-th sampling time; the state operation unit compares the drop slope operator k with the pre-stored physical capacitor natural discharge slope reference. Compare, if satisfied If the current sampling is determined to be affected by lightning-induced pulse interference, the state operation unit maintains the electrical disconnection state of the exit interception unit until the interference signal is eliminated and the slope operator returns to the reference range.

[0041] To coordinate the constraints of the software dynamic threshold and the physical gating circuit within the exit interception unit, the system establishes a two-layer interception mechanism. The physical gating circuit in the exit interception unit uses a Zener diode with a breakdown voltage of 190V. This value is determined based on 0.95 times the minimum voltage threshold required for reliable tripping of the power distribution device under extreme low-temperature conditions of -40℃, thus constructing an operational energy access boundary at the hardware level. In the actual physical architecture, the Zener diode, as a solid-state component, has its breakdown voltage parameters fixed during the manufacturing stage and does not possess the ability to actively adjust the PN junction characteristics according to changes in the external environment. This fixed hardware... The voltage threshold generated by the state operation unit software and the voltage breakdown line form a series constraint relationship in the electrical control path. The Zener diode is only responsible for forcibly blocking the most extreme absolute low-voltage collapse situation across the entire temperature range. As for the dynamic high-threshold shift caused by ambient temperature rise, the subsequent microprocessor software judgment logic will intercept and filter it. The two perform their respective functions and do not interfere with each other in the circuit. Physically, this avoids the engineering logic fallacy of requiring individual hardware to track dynamic software variables in real time. At the same time, the state operation unit generates dynamic voltage thresholds in the software algorithm based on the values ​​obtained from the ambient temperature sensor. When the ambient temperature rises from -40°C to 25°C, the voltage threshold... Linear correction from 200V to 220V; the state operation unit only operates on the real-time terminal voltage. The blockade of the logic drive module in the exit interception unit is released only when the software logic judgment is satisfied and the Zener diode can be physically broken down, thus achieving causal decoupling between software compensation and hardware locking.

[0042] To address the collaborative calibration procedure for the breakdown voltage and dynamic voltage threshold of Zener diodes, during the factory commissioning phase, a high-low temperature alternating damp heat test chamber is used to set the ambient temperature to extreme low-temperature conditions. A high-precision oscilloscope is used to acquire and extract the characteristic sequence of the critical voltage that maintains the rated operation of the trip coil of the pole-mounted circuit breaker's operating mechanism and ensures reliable armature engagement. The lower boundary characteristic point value is extracted as the absolute physical threshold. Zener diodes with fixed parameters equivalent to the absolute physical threshold are selected and integrated into the physical gating circuit. When the ambient temperature and threshold mapping table is burned into the state calculation unit, it is forcibly set that the voltage threshold corresponding to any temperature range is greater than the absolute physical threshold. This makes the physical gating circuit a bottom-level, tamper-proof hardware baseline for interception. The state calculation unit performs dynamic table lookup and anti-false lockout judgment at the software level, resolving the conflict between the constant breakdown parameters of the bottom-level hardware and the dynamic optimization parameters of the upper-level software.

[0043] To address contact erosion caused by high-frequency fault disconnection, the wear index register inside the status calculation unit continuously accumulates the electrical erosion amount generated by each disconnection action. This erosion amount is calculated based on the product of the disconnection current amplitude and the arcing time. When the accumulated wear index M exceeds 70% of the rated life, the status calculation unit initiates a threshold for the medium recovery time. Nonlinear gain compensation will restore the original medium recovery time threshold. Corrected to the compensated value ,in, The compensated media recovery time threshold, where e is a natural constant. The wear impact factor is set to 0.05, and M is the offset of the current wear index relative to the warning benchmark. To obtain and calculate the underlying basic parameters constituting the wear index, the system has a Rogowski coil built into the primary main circuit of the power distribution device. The state operation unit captures the transient signal envelope of the coil output in real time through a high-speed analog-to-digital conversion interface at a sampling frequency of not less than 10kHz to extract the breaking current amplitude. At the same time, the system collects the changes in the opto-isolation status level at both ends of the main contact in parallel. The absolute time difference between the mechanical separation trigger edge of the contact and the current completely crossing zero extinguishing edge is rigorously measured by an internal high-frequency counter. This yields the accurate arcing time of a single action, ensuring that the data input required for nonlinear gain compensation has a reliable physical hardware sensing basis. In this way, the system automatically extends the interception window as the equipment ages, offsetting the attenuation of the insulation strength recovery speed of the arc extinguishing chamber, and maintaining the stability of the operation performance of the integrated primary and secondary pole-mounted circuit breaker power distribution device remote control interlocking system during its service life.

[0044] Example 5: In a controlled environment laboratory with a temperature control accuracy of 0.5℃, the pole-mounted circuit breaker distribution device is placed in a temperature cycling field. By adjusting the external temperature control system, the ambient temperature is gradually stabilized within the range of -40℃ to 85℃ in 5℃ increments. At each stable temperature point, a high-precision regulated power supply is used to charge and discharge the energy storage capacitor of the operating mechanism. The state calculation unit collects the minimum potential difference value that causes the tripping mechanism to open and close while ensuring that the contact movement speed is not lower than 90% of the rated value. The acquired voltage value is determined as the voltage threshold. Simultaneously, the insulation recovery strength of the arc-extinguishing chamber after different interruption time intervals was measured using a power frequency withstand voltage measuring device, and the minimum time interval required for the insulation strength to reach the operating standard was extracted and determined as the dielectric recovery time threshold. Finally, the state operation unit converts the data sequence under each temperature gradient into a mapping function and stores it in the static storage address space.

[0045] During the startup phase before the integrated pole-mounted circuit breaker distribution unit is connected to the power grid, the state operation unit collects the full-range discharge characteristics of the energy storage capacitor through the sensor interface while the primary equipment is powered off. Within a 100ms monitoring period, it acquires voltage change sequences from no fewer than 2000 sampling points. The least squares method is used to calculate the linear fitting result of this sampling sequence, and the mean of the negative gradient of voltage over time is extracted and used as the benchmark for the natural discharge slope of the physical capacitor. Write to the non-volatile register, the state operation unit reads the initial value of the ambient temperature sensor and the interruption action timestamp record of the internal clock register, and completes the zero-bit initialization of the offset M of the contact wear index relative to the warning reference, so that the logic operation of the blocking determination and the calculation of the compensation function are based on the initial physical state of the pole-mounted circuit breaker distribution device.

[0046] Example 6: During the field deployment and calibration phase of the primary and secondary integrated pole-mounted circuit breaker distribution device for the new batch of electromagnetic operating mechanisms, the state calculation unit establishes a lockout parameter library for the energy storage characteristics of the current batch of electromagnetic operating mechanisms. A high-precision constant temperature simulation device maintains the ambient temperature at three calibration points: -40℃, 0℃, and 40℃. At each calibration point, the state calculation unit charges the energy storage capacitor by step-adjusting the regulated power supply and collects the critical potential difference value when the contact movement speed reaches 90% of the rated value. The least squares algorithm is used to perform function fitting on the three sets of temperature and voltage data points to obtain the voltage threshold. The functional relationship between the ambient temperature T and the ambient temperature is as follows: ,in, For the calculated voltage threshold, The slope coefficients obtained from the fitting are given by [variable name], where T is the real-time temperature value output by the ambient temperature sensor. The intercept constant of the operating mechanism in this batch at 0℃ is used. The state operation unit pre-stores the specific linear regression equation in the non-volatile storage area, so that the system can automatically adjust the intercept threshold based on real-time temperature feedback.

[0047] In the sampling link verification procedure before the formal grid connection and operation of the integrated primary and secondary pole-mounted circuit breaker distribution unit, the system triggers a calibration command for the voltage sampling circuit across the energy storage capacitor while the mechanism is in a silent state. The state calculation unit obtains the slope reference of the natural discharge of the physical capacitor within a 100ms observation window. A reference sequence is defined, and the root mean square error of the actual sampling points relative to the theoretical discharge curve is calculated simultaneously. The calculation formula is as follows: ,in, The root mean square error is N, where N is the total number of sampling points. For the i-th measured voltage sample value, The theoretically calculated voltage value at the corresponding time; the discrimination rule is: if If the voltage is greater than 0.5V, the status calculation unit will enable the channel maintenance flag and lock the exit interception unit to interrupt the operation circuit; if the root mean square error is greater than 0.5V, the status calculation unit will enable the channel maintenance flag and lock the exit interception unit to interrupt the operation circuit. Within the 0 to 0.5V determination range, the state calculation unit confirms the physical authenticity of the sampled feedback and releases the initial lockout state, thus verifying the real-time terminal voltage that subsequently participates in the decision-making process. Its voltage drop slope operator k can accurately reflect the real-time energy storage status of the primary equipment.

[0048] When the integrated primary and secondary pole-mounted circuit breaker distribution unit operates in a substation environment with strong electromagnetic pulse group interference, the data communication unit monitors the communication bit error rate of the remote control channel in real time. This parameter characterizes the level of message distortion caused by environmental spatial noise in the wireless communication link. When the percentage exceeds 1% within a 1-second statistical period, the state calculation unit checks the preset voltage threshold. The risk hedging was implemented by increasing the value to 1.1 times the original value. The decision logic for choosing this multiple factor of 1.1 is to offset the risk of remote control command parsing delay or logical misjudgment caused by the deterioration of channel quality by raising the entry threshold for operating energy. The 1.1-fold increase ratio is not based on an unfounded rough estimate, but is extracted from the extreme envelope of a large amount of field full-load operation experimental data. Test results confirm that in the command congestion scenario caused by the bit error rate triggering the 1% warning threshold, the peak single negotiation retransmission delay of the secondary side communication link is 120 milliseconds, while the maximum natural discharge decay of the operating mechanism's energy storage capacitor within this extreme time window is stably converged between 8.7% and 9.4% of the original voltage value. Therefore, the system introduces the rounding-up engineering redundancy criterion to directly establish a 10% voltage compensation margin, thereby forming a 1.1-fold rigid defense parameter that accurately covers all foreseeable physical losses. At the same time, the system uses the bus voltage transformer to monitor the primary bus voltage. State operation unit calculation With real-time terminal voltage The pressure difference ratio is used by the state calculation unit to calculate the pressure difference ratio using the formula. Dynamically adjust the output pulse width of the unlock level ,in For the preset reference pulse width, if A transient drop causes a decrease in pressure difference, and the number of state processing units increases proportionally. The duration of maintenance ensures that the operating coil receives sufficient excitation power. This closed-loop regulation method based on bus voltage feedback confirms the consistency in the conversion process from interception command to execution action, enabling the remote control interlocking system of the integrated primary and secondary pole-mounted circuit breaker distribution device to maintain stable electrical interlocking performance during dynamic fluctuations in the power system. Although random bit errors at the communication network level and local charge dissipation at the electrical hardware level span macroscopic and microscopic scales in terms of time and physical scale, they form a direct causal coupling in the action chain of interlocking execution through system clock hysteresis. That is, disordered congestion retransmission at the network protocol layer inevitably forces the synchronous delay of the command judgment timing of the underlying control unit. This invisible communication window period is exactly equivalent to the duration of uncontrolled continuous microscopic self-discharge at the end of the energy storage capacitor, thereby causing the abstract network channel deterioration parameter in the energy domain to be affected. The loss of Coulomb charge is materialized into a specific amount, establishing a direct conversion channel for cross-scale physical states. Addressing the voltage threshold increase mechanism caused by communication error rate, a mapping relationship is constructed between communication retransmission delay and energy leakage compensation of the energy storage capacitor. During the calibration phase, a protocol analyzer is used to capture and statistically analyze the average command congestion retransmission delay window from the master station to the receiving side of the distribution terminal when the bit error rate reaches 1%. Simultaneously, a high-impedance electrometer is used to measure the total calculus value of the voltage drop caused by natural leakage discharge of the energy storage capacitor within the delay window, which is then converted into a reference voltage compensation coefficient. This ensures that the 0.1-fold increment in the command to increase the voltage threshold to 1.1 times the original value is precisely equal to the total calculus value of the voltage drop. The increased potential energy of the stored charge is used to offset the command delay leakage loss caused by communication channel degradation, establishing an objective physical correspondence between information domain delay and energy domain compensation.

[0049] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit of this application and the scope of protection of this invention, and all of these forms are within the protection scope of this application.

Claims

1. A remote control interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device, characterized in that, include: The data communication unit is used to receive remote control commands. The outlet interception unit is connected in series in the operating coil circuit of the pole-mounted circuit breaker and is used to control the electrical on / off state of the operating coil circuit. The status calculation unit is connected to the data communication unit and the exit interception unit respectively. The status calculation unit is used to collect the real-time terminal voltage of the energy storage capacitor in the pole-mounted circuit breaker operating mechanism and extract the timestamp of the previous disconnection action recorded in the internal register. The status calculation unit has a pre-stored mapping table of ambient temperature and threshold. The status calculation unit is also used to obtain the ambient temperature and determine the voltage threshold and dielectric recovery time threshold corresponding to the real-time terminal voltage according to the mapping table. After determining that the remote control action command is legal, the status calculation unit locks the exit interception unit and collects the real-time terminal voltage at the current moment. When the real-time terminal voltage is greater than the voltage threshold, and the difference between the current system time and the timestamp of the previous interruption action is greater than the medium recovery time threshold, the status calculation unit releases the lock on the exit interception unit and outputs an unlock level to the operation coil circuit; if the real-time terminal voltage is less than or equal to the voltage threshold, or the difference is less than or equal to the medium recovery time threshold, the status calculation unit maintains the disconnected state of the exit interception unit and generates a blocking message containing the real-time terminal voltage and the difference.

2. The remote control interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device according to claim 1, characterized in that, The state operation unit verifies the sampling validity before outputting the unlock level, including the following steps: within a 500μs time window after receiving the remote control action command, the energy storage capacitor is sampled for a secondary voltage to obtain the secondary voltage sample value; the rate of change of the secondary voltage sample value relative to the real-time terminal voltage is calculated; when the rate of change is within the preset physical capacitor natural discharge slope range, the real-time terminal voltage is determined to be valid and the unlock level is output; when the rate of change exceeds the physical capacitor natural discharge slope range, transient interference noise is determined to exist and the locked state of the exit interception unit is maintained.

3. The remote control interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device according to claim 1, characterized in that, The mapping table records the physical correction coefficients corresponding to different temperature ranges; the state operation unit uses the physical correction coefficients to numerically compensate the voltage threshold in order to offset the charge density drift of the energy storage capacitor under changes in ambient temperature.

4. The remote control interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device according to claim 1, characterized in that, The exit interception unit includes interconnected logic drive modules and a physical gating circuit; the physical gating circuit is equipped with a Zener diode; the breakdown voltage of the Zener diode is set to 0.95 to 1.05 times the voltage threshold, which is used to forcibly disconnect the operation coil circuit when the real-time terminal voltage is lower than the breakdown voltage.

5. The remote control interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device according to claim 1, characterized in that, The data communication unit is also used to monitor the communication error rate; when the error rate exceeds 1% within a preset statistical period, the status operation unit increases the voltage threshold to 1.1 times the original value.

6. The remote control interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device according to claim 1, characterized in that, The system also includes a bus voltage transformer; the bus voltage transformer is connected to the status calculation unit and outputs bus voltage data; the status calculation unit adjusts the output pulse width of the unlocking level according to the voltage difference ratio between the bus voltage data and the real-time terminal voltage.

7. The remote control interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device according to claim 1, characterized in that, The exit interception unit includes an opto-isolation module; the output of the logic drive module is coupled to the operation coil circuit through the opto-isolation module to isolate the secondary logic circuit from the primary high-voltage circuit.

8. The remote control interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device according to claim 1, characterized in that, The status calculation unit identifies the sub-health state of the hardware by calculating the voltage recovery rate of the energy storage capacitor after the disconnection action in real time. When the voltage recovery rate is lower than the preset slope benchmark for three consecutive working cycles, the status calculation unit outputs a device maintenance signal and blocks the output interception unit.

9. The remote control interlocking system for a primary and secondary integrated pole-mounted circuit breaker distribution device according to claim 1, characterized in that, The data communication unit is also used to upload the blocking message to the distribution network dispatch master station; the blocking message includes the physical parameter category that triggered the blocking, the real-time terminal voltage, and the numerical deviation of the real-time terminal voltage relative to the voltage threshold.

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