Secondary circuit nuclear phase integrated system based on wireless synchronization technology

Abstract

The invention provides a secondary circuit nuclear phase integrated system based on a wireless synchronization technology, which relates to the technical field of transformer substation secondary system circuit inspection, is designed for wiring verification of a transformer substation secondary alternating current system, and specifically comprises a power supply module, a power supply control module and a handheld module, the power supply module and the power supply control module can provide continuous adjustable voltage output, provide a power supply for a transformer substation, and send an A phase as a phase reference in a wireless mode, and the handheld terminal equipment can determine the phase of the transformer substation according to amplitude and phase values wirelessly broadcasted by a power supply end and in combination with a self-measured value, a conversion formula and a diagnosis algorithm. According to the method, the primary and secondary current amplitudes and phases are measured, and the wiring correctness of each loop is determined according to the primary and secondary current phases and amplitudes, so that the problems in the commissioning process are effectively solved, and a reliable guarantee is provided for successful primary commissioning of a transformer substation.

Description

Technical Field

[0001] The present invention relates to the technical field of secondary system loop inspection in substations, and particularly to a secondary loop phase verification integrated system based on wireless synchronization technology. Background Art

[0002] The electrical equipment in a substation is divided into primary equipment and secondary equipment. The primary equipment is the equipment that directly produces, transmits, and distributes electric energy, mainly including generators, power transformers, circuit breakers, disconnecting switches, power buses, power cables, and transmission lines. The secondary equipment is the equipment that controls, regulates, protects, and detects the primary equipment, including control devices, relay protection and safety automatic devices, measuring instruments, and signal devices, etc. The secondary equipment is connected according to certain rules to form an electrical loop that meets certain technical requirements, which is called a secondary loop. Currently, the overall inspection device for secondary AC in power plants and substations is designed for wiring verification of the secondary AC system in substations;

[0003] However, during the overall inspection of the secondary system loop in a substation, since it is impossible to verify wiring faults such as the wiring, transformation ratio, polarity, and open circuit of the secondary AC system based on the amplitude and phase values broadcast wirelessly from the power source end, combined with its own measured values, conversion formulas, and diagnostic algorithms, it is impossible to conduct an overall inspection of the secondary system loop in the substation, thus unable to meet the requirements for successful initial operation of the substation. Secondly, in wireless transmission, more accurate synchronization operations cannot be achieved, and signal loss occurs frequently, posing concerns about safety. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a secondary loop phase verification integrated system based on wireless synchronization technology to solve at least the above problems.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A secondary loop phase verification integrated system based on wireless synchronization technology includes a substation and a three-phase power supply for the substation, and further includes a handheld module, a power supply module, and a power supply control module. The power supply module uses the three-phase power supply for the substation as an input, and its output terminal provides a low-voltage power supply for the substation;

[0007] The power supply control module is electrically connected to the power supply module. The power supply control module is used to control the output voltage and operation mode of the power supply module, and wirelessly sends the phase information of its phase A to the handheld module as a phase reference, and simultaneously sends a synchronization pulse for data synchronization;

[0008] The handheld module and the power control module are connected by wireless communication for phase-synchronized sampling communication. The handheld module uses the phase information of phase A of the power module sent by the power control module as the reference phase to measure the amplitudes and phases of the secondary AC signals output by the voltage transformers and current transformers in the substation, and to judge the phase polarities and transformation ratios.

[0009] Furthermore, the power module includes a three-phase power input module, a three-phase power output module, an intelligent circuit breaker, an automatic reactive power compensation module, a three-phase voltage regulator, a PT / CT module, and a first measurement interface. The three-phase power input module is electrically connected to the three-phase power output module through the automatic reactive power compensation module and the three-phase voltage regulator respectively. The three-phase power input module is electrically connected to the three-phase power supply for the substation through the intelligent circuit breaker. The three-phase power output module is electrically connected to the substation. The first measurement interface is electrically connected to the intelligent circuit breaker, the stepping motor, and the PT / CT module. The stepping motor is electrically connected to the three-phase voltage regulator. The PT / CT module is electrically connected to the three-phase power output module. The power module is electrically connected to the power control module through the first measurement interface.

[0010] Furthermore, the power control module includes a control interface, a first processor, a control signal module, and a signal isolation module. The control interface is electrically connected to the measurement interface in the power module. The signal isolation module is electrically connected to the control interface and the control signal module. The control signal module is electrically connected to the first processor.

[0011] Furthermore, both the power module and the power control module are provided with rainproof enclosures, and a cooling fan is arranged inside the power module.

[0012] Furthermore, the handheld module includes a second measurement interface, a second processor, a liquid crystal touch screen, and a timing crystal oscillator. The second measurement interface is used to be electrically connected to the PT and CT interfaces on the substation. The liquid crystal touch screen and the timing crystal oscillator are both electrically connected to the second processor.

[0013] Furthermore, EMC protection modules, AD acquisition modules, Beidou timing modules, wireless synchronization modules, and wireless communication modules are all provided in the power control module and the handheld module. The EMC protection modules are all electrically connected to the AD acquisition modules. The EMC protection module in the power control module is electrically connected to the control interface, and the AD acquisition module is electrically connected to the first processor. The EMC protection module in the handheld module is electrically connected to the second measurement interface, and the AD acquisition module is electrically connected to the second processor. The Beidou timing module, wireless synchronization module, and wireless communication module in the power control module are all electrically connected to the first processor. The Beidou timing module, wireless synchronization module, and wireless communication module in the handheld module are all electrically connected to the second processor. The power control module and the handheld module perform wireless communication and wireless pulse synchronization data through the wireless synchronization module and the wireless communication module.

[0014] Furthermore, the OOK method is used to implement the modulation and demodulation of the synchronization pulse. The specific OOK method is as follows: The synchronization pulse signal is modulated by the OOK method to generate an OOK signal. The OOK signal is filtered through a band-pass filter, and a continuous wave detection logarithmic amplifier is used to detect the OOK signal to extract the signal envelope. The extracted envelope is judged to restore the pulse waveform.

[0015] Furthermore, the OOK signal is expressed as:

[0016] S(t) = ∑ n a n g(t - nT b )cos(ω c t)

[0017] where a n represents the amplitude coefficient of the nth component; g(t - nT b ) represents a time function, indicating the value of the function at time t - nT b ; ω t is the angular frequency of the carrier wave.

[0018] Furthermore, a continuous wave detection logarithmic amplifier is used to detect the OOK signal to extract the signal envelope. The output formula for the continuous wave detection logarithmic amplifier to detect the OOK signal is:

[0019] u oo = K D (Ku0 + K 2 u0 +... + K n-1 u0 + K n u0)

[0020] where K D is the gain of the amplifier; K is a constant related to the characteristics of the amplifier; uoo represents the output of the logarithmic amplifier; u0 represents the input signal of the logarithmic amplifier;

[0021] Further, when the input signal exceeds u i1 the output of the final amplifier of the continuous detection type logarithmic amplifier remains constant at u L At this time, the coordinates of the critical point P1 are:

[0022]

[0023] where, u i1 and u o1 represent the critical values of the input and output of P1 respectively;

[0024] The coordinates at the critical point P2 are:

[0025]

[0026] where, u i2 and u o2 represent the critical values of the input and output of P2 respectively;

[0027] The coordinates at the critical point Pm are:

[0028]

[0029] where, u im and u om represent the critical values of the input and output of Pm respectively;

[0030] Solving the above critical point coordinate formulas gives:

[0031]

[0032] Substituting the solution results into the output formula, the final output formula is obtained:

[0033]

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] The present invention is designed for wiring verification of the secondary AC system of a substation, and can provide an adjustable output voltage for the substation through a power supply module. The power control module can wirelessly transmit its A-phase phase information. The handheld module can, according to the phase value transmitted by the power control module, combine its own measurement value, conversion formula, and diagnostic algorithm to detect faults in the secondary AC system;

[0036] Both the power control module and the handheld module are equipped with a Beidou time synchronization module, a wireless communication module, and a wireless synchronization module, which can synchronize the power control module and the handheld module, solve the problems of delay and frequency shift, and when the Beidou time synchronization and wireless synchronization signals are lost, they can maintain synchronous operation through the crystal oscillator module to improve the measurement stability. Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only the preferred embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0038] Figure 1 It is a schematic diagram of the overall structure of the system provided by the present invention;

[0039] Figure 2 It is a waveform diagram of the modulation principle of the OOK method provided by the present invention;

[0040] Figure 3 It is a schematic diagram of the keying method provided by the present invention;

[0041] Figure 4 It is a schematic diagram of envelope detection provided by the present invention;

[0042] Figure 5 It is a schematic diagram of the logarithmic amplifier provided by the present invention;

[0043] Figure 6 It is a logarithmic characteristic curve diagram of the logarithmic amplifier provided by the present invention. Detailed Embodiments

[0044] The following further elaborates on the technical solutions of the present invention in combination with the drawings in the specification and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" describes a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments and can be combined with each other without conflict.

[0045] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

[0046] It should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present invention to those skilled in the art. The terms used herein are for the purpose of describing particular embodiments only and are not intended to be limiting of the present invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, specify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. As used herein, the term "and / or" includes any and all combinations of the associated listed items.

[0047] It should be further noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be intervening elements. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be intervening elements at the same time. The terms "vertical", "horizontal", "inner", "outer", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0048] To thoroughly understand the present invention, detailed structures will be presented in the following description to illustrate the technical solutions proposed by the present invention. The optional embodiments of the present invention are described in detail as follows. However, in addition to these detailed descriptions, the present invention can also have other embodiments.

[0049] Refer to Figure 1 , the present invention provides a secondary circuit phase verification integration system based on wireless synchronization technology, including a substation and a three-phase power supply for the substation, and further including a handheld module, a power supply module and a power supply control module. The power supply module uses the three-phase power supply for the substation as an input, and the output end provides a low-voltage power supply for the substation;

[0050] The power supply control module is electrically connected to the power supply module. The power supply control module is used to control the output voltage and operation mode of the power supply module, and wirelessly sends the phase information of its phase A to the handheld module as a phase reference, and at the same time sends a synchronization pulse for data synchronization;

[0051] The handheld module and the power control module are connected by wireless communication for phase-synchronized sampling communication. The handheld module uses the phase information of phase A of the power module sent by the power control module as the reference phase to measure the amplitudes and phases of the secondary AC signals output by the voltage transformer and current transformer in the substation, and judges the phase polarity and transformation ratio.

[0052] Exemplarily, the power module uses the three-phase power supply of 380V three-star AC power supply for substations as the input. The power module can provide a continuously adjustable output voltage of 0 - 1000V to supply power to the primary system of the substation. The handheld module checks the wiring faults of the transformation ratio, polarity, and open circuit of the secondary AC system according to the amplitude-phase values sent by the power control module, combined with its own measurement values, conversion formulas, and diagnostic algorithms. The handheld module can import inspection tasks, calculate amplitude-phase values, and check for open circuits and three-phase phase sequences.

[0053] During use, connect the power module to the three-phase power supply of 380V three-phase alternating current for substations, and connect the power module to the three-phase windings of the main transformer in the substation. Use the internal step-up transformer to apply voltage to the high-voltage side of the main transformer to energize the entire secondary circuit of the substation; use the handheld module to measure the phase and amplitude at the CT or PT on the high-voltage side of the main transformer, the CT on the low-voltage side of the main transformer, and the outgoing CT where current or voltage needs to be measured; each time the handheld module measures data, it will compare with the data of the power module detected by the power control module at the same time, display the phase hexagram of the current measurement value, and display the task data in the form of a table, etc. By measuring the amplitudes and phases of the primary and secondary currents, and determining the correctness of the wiring of each circuit according to the amplitudes and phases of the primary and secondary currents, the problems that occur during the commissioning process of the substation are effectively solved, providing a reliable guarantee for the successful commissioning of the primary system of the substation.

[0054] The power module includes a three-phase power input module, a three-phase power output module, an intelligent circuit breaker, an automatic reactive power compensation module, a three-phase voltage regulator, a PT / CT module, and a first measurement interface. The three-phase power input module is electrically connected to the three-phase power output module through the automatic reactive power compensation module and the three-phase voltage regulator respectively. The three-phase power input module is electrically connected to the three-phase power supply for substations through the intelligent circuit breaker. The three-phase power output module is electrically connected to the substation. The first measurement interface is electrically connected to the intelligent circuit breaker, the stepping motor, and the PT / CT module. The stepping motor is electrically connected to the three-phase voltage regulator. The PT / CT module is electrically connected to the three-phase power output module. The power module is electrically connected to the power control module through the first measurement interface.

[0055] Exemplarily, an induction oil-immersed voltage regulator is used in the three-phase voltage regulator of the power supply module, enabling continuous voltage adjustment; the automatic reactive power compensation module enables the power supply module to operate at the minimum impedance, reducing the output power of the power supply module. The 380V power supply passes through the intelligent circuit breaker and the three-phase power input module, then respectively through the automatic reactive power compensation module and the three-phase voltage regulation module, and finally outputs from the three-phase power output module to supply power to the substation. The power control module can, through the first measurement interface, control the intelligent circuit breaker and the stepping motor to achieve control over the start-stop mode and continuous regulation of the voltage. At the same time, the three-phase power output module is connected with voltage and current transformers, and can externally feedback the real-time voltage and current signals of the output terminal through the first measurement interface.

[0056] The power control module includes a control interface, a first processor, a control signal module, and a signal isolation module. The control interface is electrically connected to the measurement interface in the power supply module. The signal isolation module is electrically connected to the control interface and the control signal module. The control signal module is electrically connected to the first processor.

[0057] Both the power supply module and the power control module are provided with rainproof enclosures, and a cooling fan is provided inside the power supply module.

[0058] The handheld module includes a second measurement interface, a second processor, a liquid crystal touch screen, and a timing crystal oscillator. The second measurement interface is used to be electrically connected to the PT and CT interfaces on the substation. Both the liquid crystal touch screen and the timing crystal oscillator are electrically connected to the second processor.

[0059] Both the power control module and the handheld module are provided with an EMC protection module, an AD acquisition module, a Beidou timing module, a wireless synchronization module, and a wireless communication module. The EMC protection module is electrically connected to the AD acquisition module. The EMC protection module in the power control module is electrically connected to the control interface, and the AD acquisition module is electrically connected to the first processor. The EMC protection module in the handheld module is electrically connected to the second measurement interface, and the AD acquisition module is electrically connected to the second processor. The Beidou timing module, the wireless synchronization module, and the wireless communication module in the power control module are all electrically connected to the first processor. The Beidou timing module, the wireless synchronization module, and the wireless communication module in the handheld module are all electrically connected to the second processor. The power control module and the handheld module perform wireless communication and wireless pulse synchronous data through the wireless synchronization module and the wireless communication module.

[0060] Exemplarily, both the power control module and the handheld module are configured with a Beidou timing module to obtain timing pulses; at the same time, the power control module uses the zero crossing of phase A as the synchronization time point, continuously emits synchronization pulses through the wireless synchronization module, and the handheld module receives the synchronization pulses to synchronize with the power control module, so as to provide synchronization signals for the entire system when the stolen signal is unstable.

[0061] Both the power control module and the handheld module are equipped with EMC protection circuits to prevent surges from damaging the internal circuits, and a high-precision AD acquisition module is used to collect voltage and current signals; the power control module broadcasts the collected data through a wireless communication module to provide a reference for the handheld module to calculate the phase angle and amplitude; the power control module also receives control instructions from the handheld module through the wireless communication module to adjust the output voltage of the power module and the start / stop state of the power module.

[0062] The handheld module is provided with a high-precision timing crystal oscillator. If the Beidou timing and wireless synchronization signals are lost simultaneously during the measurement process, it can still operate synchronously under the action of the crystal oscillator for 2 - 3 hours.

[0063] The handheld module is provided with a liquid crystal touch screen, which can display the measured voltage and current amplitudes and phases, and can also set the output voltage and start / stop state of the power supply end, facilitating measurements for substations of different levels.

[0064] The wireless communication module supports wireless MESH networking technology of TPUNB and TP-DSME protocols. The wireless synchronization module adopts a NAND soft demodulation scheme. The time difference of multi-device synchronization within 1 km under low signal-to-noise ratio is <10 us; both the power control module and the handheld module processors use embedded processors and the linux system, support the Internet of Things SSH server technology, can upgrade programs, the handheld module has wifi and Ethernet interfaces, and supports multiple communication protocols to communicate with the background analysis software, and supports distributed network-type database technology.

[0065] Refer to Figure 2 and Figure 4 , the OOK method is used to implement the modulation and demodulation of the synchronization pulse. The specific OOK method is as follows: the synchronization pulse signal is modulated by the OOK method to generate an OOK signal, the OOK signal is filtered through a band-pass filter, a continuous detection logarithmic amplifier is used to detect the OOK signal, the signal envelope is extracted, and the extracted envelope is judged to restore the pulse waveform.

[0066] Exemplarily, the synchronization pulses continuously emitted by the wireless synchronization module mainly achieve wireless pulse synchronization data measurement. The phase information of the synchronization pulses will seriously affect the accuracy of the sampling information. Low-jitter synchronization pulse signals are required to synchronize the data. The synchronization pulses are required to have a jitter lower than 30 ns. Therefore, the OOK method sensitive to signal repetition is selected to implement the modulation and demodulation of the synchronization pulses.

[0067] The OOK method is a binary amplitude shift keying method, and its principle is to use a binary code sequence to control the on and off of the carrier. Assume that the waveform of the binary symbol generated by the information source is g(t - nT b ), which is a pulse with a width of T bFor a square wave signal, the binary sequence generated by the source is a random variable subject to a binomial distribution, with a probability of 0 being p and a probability of 1 being 1 - p, denoted by the symbol a n denote;

[0068] The oscillation frequency of the sine carrier is ω c , then the OOK signal can be expressed as:

[0069] S(t) = Σ n a n g(t - nT b )cos(ω c t)

[0070] where a n represents the amplitude coefficient of the nth component; g(t - nT b ) represents a time function, indicating the value of the function at time t - nT b ; ω t is the angular frequency of the carrier.

[0071] Refer to Figure 3 , use the keying method to modulate and demodulate the pulse. When the binary symbol is 1, the switch is turned to the carrier port, the carrier output is turned on, and the sine carrier signal is output. When the binary symbol is 0, the switch is turned to the output mute port, and the sine carrier output is turned off.

[0072] The OOK method is achieved by charging and discharging the capacitor. If the charging time constant is too large, it is difficult to meet the design requirement for the 30ns pulse jitter. Therefore, a logarithmic amplifier that is more sensitive to the envelope amplitude and has a faster response time is selected for detection;

[0073] Refer to Figure 5 and Figure 6 , the continuous detection type logarithmic amplifier is composed of several limiter amplifiers cascaded. For the input-output response of each limiter amplifier, when the input signal is small, the limiter amplifier approximates a linear amplifier, and the gain approximates K. When the input signal reaches u i1 , the output is constant at u L ;

[0074] When multiple limiter amplifiers are cascaded, in the case of a small input signal, all limiter amplifiers are in the linear amplification region, and the input-output relationship at this time is:

[0075] u oo = K D (Ku0 + K 2 u0 +... + K n-1 u0 + K n u0)

[0076] where K Dis the gain of the amplifier; K is a constant related to the characteristics of the amplifier; u oo represents the output of the logarithmic amplifier; u0 represents the input signal of the logarithmic amplifier;

[0077] When the input signal exceeds u i1 , the final-stage amplifier saturates, and at this time, the output of the final-stage amplifier is u L , and the others remain unchanged. At this time, the coordinates of the critical point P1 are:

[0078]

[0079] Among them, u i1 and u o1 represent the critical values of the input and output of P1 respectively;

[0080] Similarly, the coordinates at the critical point P2 are:

[0081]

[0082] Among them, u i2 and u o2 represent the critical values of the input and output of P2 respectively;

[0083] By analogy, the coordinates at the critical point Pm are:

[0084]

[0085] Among them, u im and u om represent the critical values of the input and output of Pm respectively;

[0086] Solving the above critical point coordinate formula gives:

[0087]

[0088] Substituting the solution result into the output formula, the final output formula is obtained:

[0089]

[0090] It should be noted that components such as the three-phase power supply for substation, three-phase power input module, three-phase power output module, intelligent circuit breaker, automatic reactive power compensation module, three-phase voltage regulator, PT / CT module, first measurement interface, control interface, first processor, control signal module, signal isolation module, cooling fan, second measurement interface, second processor, liquid crystal touch screen, timing crystal oscillator, EMC protection module, AD acquisition module, Beidou timing module, wireless synchronization module and wireless communication module adopted in this application are all existing electronic components in the art. Those skilled in the art can obtain and understand the circuit structures of the above-mentioned electronic components such as the three-phase power supply for substation, three-phase power input module, three-phase power output module, intelligent circuit breaker, automatic reactive power compensation module, three-phase voltage regulator, PT / CT module, first measurement interface, control interface, first processor, control signal module, signal isolation module, cooling fan, second measurement interface, second processor, liquid crystal touch screen, timing crystal oscillator, EMC protection module, AD acquisition module, Beidou timing module, wireless synchronization module and wireless communication module, as well as the circuit connection structures between them according to the existing public technical knowledge and technical materials. The embodiments of this application will not elaborate on this specifically, and those skilled in the art can freely select corresponding models as needed. No specific limitations are made in this embodiment.

[0091] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A secondary circuit phase verification integrated system based on wireless synchronization technology, comprising a substation and a three-phase power supply for the substation, characterized in that, It also includes a handheld module, a power supply module, and a power supply control module. The power supply module uses the three-phase power supply of the substation as the input, and its output terminal provides a low-voltage power supply for the substation; The power supply control module is electrically connected to the power supply module. The power supply control module is used to control the output voltage and operation mode of the power supply module, and wirelessly send the phase information of its phase A to the handheld module as the phase reference, and at the same time send a synchronization pulse for data synchronization; The handheld module and the power supply control module perform phase synchronization sampling communication through wireless communication. The handheld module uses the phase information of phase A of the power supply module sent by the power supply control module as the reference phase to measure the amplitudes and phases of the secondary AC signals output by the voltage transformer and current transformer of the substation, and judge the phase polarity and transformation ratio.

2. The integrated system for secondary circuit phase verification based on wireless synchronization technology according to claim 1, wherein The power supply module includes a three-phase power supply input module, a three-phase power supply output module, an intelligent circuit breaker, an automatic reactive power compensation module, a three-phase voltage regulator, a PT / CT module, and a first measurement interface. The three-phase power supply input module is electrically connected to the three-phase power supply output module through the automatic reactive power compensation module and the three-phase voltage regulator respectively. The three-phase power supply input module is electrically connected to the three-phase power supply of the substation through the intelligent circuit breaker. The three-phase power supply output module is electrically connected to the substation. The first measurement interface is electrically connected to the intelligent circuit breaker, the stepping motor, and the PT / CT module. The stepping motor is electrically connected to the three-phase voltage regulator. The PT / CT module is electrically connected to the three-phase power supply output module. The power supply module is electrically connected to the power supply control module through the first measurement interface.

3. The secondary circuit phase verification integrated system based on wireless synchronization technology according to claim 2, wherein, The power supply control module includes a control interface, a first processor, a control signal module, and a signal isolation module. The control interface is electrically connected to the first measurement interface in the power supply module. The signal isolation module is electrically connected to the control interface and the control signal module. The control signal module is electrically connected to the first processor.

4. The secondary circuit phase verification integrated system based on wireless synchronization technology according to claim 3, characterized in that, Both the power supply module and the power supply control module are provided with rainproof enclosures, and a cooling fan is provided inside the power supply module.

5. A secondary circuit phase verification integrated system based on wireless synchronization technology according to claim 3, characterized in that, The handheld module includes a second measurement interface, a second processor, a liquid crystal touch screen, and a timing crystal oscillator. The second measurement interface is used to be electrically connected to the PT and CT interfaces on the substation. The liquid crystal touch screen and the timing crystal oscillator are both electrically connected to the second processor.

6. The integrated system for secondary circuit phase verification based on wireless synchronization technology according to claim 5, characterized in that An EMC protection module, an AD acquisition module, a Beidou timing module, a wireless synchronization module, and a wireless communication module are provided in both the power control module and the handheld module. The EMC protection modules are electrically connected to the AD acquisition modules. The EMC protection module in the power control module is electrically connected to the control interface, and the AD acquisition module is electrically connected to the first processor. The EMC protection module in the handheld module is electrically connected to the second measurement interface, and the AD acquisition module is electrically connected to the second processor. The Beidou timing module, the wireless synchronization module, and the wireless communication module in the power control module are all electrically connected to the first processor. The Beidou timing module, the wireless synchronization module, and the wireless communication module in the handheld module are all electrically connected to the second processor. The power control module and the handheld module perform wireless communication and wireless pulse synchronization data through the wireless synchronization module and the wireless communication module.

7. A secondary circuit phase verification integrated system based on wireless synchronization technology according to claim 1, characterized in that, The OOK method is used to realize the modulation and demodulation of the synchronization pulse. The specific OOK method is as follows: The synchronization pulse signal is modulated by the OOK method to generate an OOK signal. The OOK signal is filtered through a band-pass filter, and a continuous detection type logarithmic amplifier is used to detect the OOK signal to extract the signal envelope. The extracted envelope is judged to restore the pulse waveform.

8. A secondary circuit phase verification integration system based on wireless synchronization technology according to claim 7, characterized in that, The OOK signal is expressed as: S(t) = Σ n a n g(t - nT b )cos(ω c t) Among them, a n represents the amplitude coefficient of the nth component; g(t - nT b ) represents a time function, indicating the value of the function at time t - nT b ; ω t is the angular frequency of the carrier wave.

9. The integrated system for secondary circuit phase verification based on wireless synchronization technology according to claim 8, characterized in that, A continuous detection type logarithmic amplifier is used to detect the OOK signal to extract the signal envelope. The output formula in the detection of the OOK signal by the continuous detection type logarithmic amplifier is: u oo = K D (Ku0 + K 2 u0 +... + K n-1 u0 + K n u0) Among them, K D is the gain of the amplifier; K is a constant related to the characteristics of the amplifier; u oo represents the output of the logarithmic amplifier; u0 represents the input signal of the logarithmic amplifier.

10. A secondary circuit phase verification integrated system based on wireless synchronization technology according to claim 9, characterized in that When the input signal exceeds u i1 the output of the final amplifier of the continuous detection logarithmic amplifier remains constant at u L At this time, the coordinates of the critical point P1 are: where u i1 and u o1 represent the critical values of the P1 input and output, respectively; The coordinates at the critical point P2 are: where u i2 and u o2 represent the critical values of the P2 input and output, respectively; The coordinates at the critical point Pm are: where u im and u om represent the critical values of the Pm input and output, respectively; Solving the above critical point coordinate formula gives: Substituting the solution result into the output formula gives the final output formula:

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