A distributed ship power monitoring system and method based on synchronous acquisition
By designing a distributed monitoring system based on synchronous acquisition in the ship power system, real-time data acquisition and interlocking control is achieved using modules such as reinforced computers and fault recording devices, the problems of high resources and poor synchronization in the existing technology are solved. , improves the monitoring and control reliability of the power system.
Patent Information
- Application Number
- CN202111259432.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-10-28
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2041-10-28
AI Technical Summary
The existing ship power system monitoring system has the problems of centralized monitoring, resulting in high equipment resources, many interfaces, and low fault tolerance, and the distributed monitoring system cannot achieve real-time synchronous acquisition and fault analysis support.
Design a distributed ship power monitoring system based on synchronous acquisition, including reinforced computers, fault recording devices, insulated information comprehensive processing modules, signal acquisition modules, area monitors, insulated monitoring modules, sensors and displays, through the network and CAN bus It realizes synchronous data acquisition and interlocking control of each module, and uses UPS power supply to ensure uninterrupted power supply of the fault recording function.
It realizes high-precision distribution monitoring and synchronous collection of transient and steady-state operating parameters of the ship's power system, improves information integration and automation, optimizes control lines, reduces the complexity of the cabin cable and equipment interface, and increases the The reliability and redundancy of control ensure the stable operation of the power system.
Smart Images
Figure CN113949165B_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the field of automatic control technology and communication technology, and in particular relates to a distributed ship power monitoring system and method based on synchronous acquisition. Background Art
[0002] With the continuous improvement of the electrification level of ships, the number of equipment in ship power systems has increased sharply, and the number of equipment that needs to be monitored, controlled and protected has increased accordingly. In addition, the growth of ship power systems has also put forward higher requirements on the control and protection logic of power systems. At the same time, the increase in monitoring points in the power system has put forward higher requirements on the monitoring system. The use of a centralized monitoring system for monitoring will bring about problems such as many cables through the cabin, large equipment size, high hardware resource requirements for monitoring equipment, many interfaces of the main monitoring equipment, and low fault tolerance of the monitoring equipment; the use of a distributed monitoring system will bring about problems such as the inability to synchronize the various monitoring devices in real time and the difficulty of monitoring data to provide effective support for fault analysis of the power system. Summary of the invention
[0003] The technical problem to be solved by the present invention is to provide a distributed ship power monitoring system and method based on synchronous acquisition, which are used to realize distributed monitoring, synchronous acquisition and centralized display of signals.
[0004] The technical solution adopted by the present invention to solve the above technical problems is: a distributed ship power monitoring system based on synchronous acquisition, including a reinforced computer, a fault recording device, an insulation information comprehensive processing module, a signal acquisition module, a regional monitor, an insulation monitoring module, a sensor, and a display; the fault recording device is connected to the reinforced computer through a network, and is used to send power grid fault information to the reinforced computer; the fault recording device is connected to the signal acquisition module through a network, and is used to periodically send PTP timing information to the signal acquisition module, so that the clock of the signal acquisition module and the fault recording device maintain time synchronization; the fault recording device is also used to receive the data message with a time stamp sent by the signal acquisition module in real time, and perform fault judgment on the data message. If the fault condition is met, the data message within a period of time before and after the fault point is stored in the hard disk of the fault recording device, and the fault information is sent to the reinforced computer; the signal receiving end of the signal acquisition module is connected to the signal sending end of the sensor; the signal acquisition module includes a high-speed AD, which is used to collect the analog signal of the sensor, and convert the analog signal into a data message in a fixed format, and send it to the fault recording device after adding a time stamp; the signal acquisition module also includes A programmable logic controller is used to collect switch signals of power system circuit breakers; the programmable logic controllers of different signal acquisition modules realize information exchange through the CAN bus, and realize interlocking control protection of the power system according to the interlocking logic; the insulation information comprehensive processing module is connected to the reinforcement computer through the CAN bus, and is used to send power grid insulation information to the reinforcement computer; the insulation information comprehensive processing module is connected to the insulation monitoring module through the CAN bus, and is used to periodically send measurement instructions to the insulation monitoring module, receive measurement information fed back by the insulation monitoring module, and forward the measurement information to the reinforcement computer; the insulation monitoring module is used to measure the insulation resistance of the power system busbar using the three-voltage method according to the received measurement instructions; if the busbar insulation resistance is low, the low insulation branch of the power system is located by the dual-frequency method, and the measurement information is fed back to the insulation information comprehensive processing module through the CAN bus; the regional monitor is connected to the reinforcement computer through the network, and is used to send power grid steady-state information to the reinforcement computer and receive control instructions; the regional monitor is connected to the power system equipment through the CAN bus, the network, and the serial port respectively, sends control instructions to the power system equipment, and receives the power information sent by the power system equipment.
[0005] According to the above scheme, the sensors include voltage sensors, current sensors, and insulation monitoring sensors, which are used to measure power system operating parameters including voltage, current, and insulation impedance, respectively.
[0006] According to the above scheme, the display is connected to the reinforced computer via a video interface to receive and display the power system status information.
[0007] According to the above scheme, it also includes a UPS power supply, which includes a battery pack and a control module; the power input end of the UPS power supply is connected to two AC power supplies for converting the two AC power supplies into two DC power supplies respectively; the power input end of the battery pack is connected to the second DC power supply, and the power output end of the UPS power supply is respectively connected to the first DC power supply and the DC power output of the battery pack; the control module is used to select the output of the first DC power supply and / or the DC power of the battery pack; the first DC power output end of the UPS power supply is respectively connected to the power supply end of the reinforced computer, the insulation information comprehensive processing module, and the display; the DC power output end of the battery pack of the UPS power supply is respectively connected to the power supply end of the fault recording device, the signal acquisition module, and the sensor, for providing uninterrupted power supply for the fault recording function.
[0008] Furthermore, it also includes a cabinet body, which is provided with a slide rail for installing a reinforced computer, a fault recording device, an insulation information comprehensive processing module, and a UPS power supply.
[0009] A distributed ship power monitoring method based on synchronous acquisition includes the following steps:
[0010] S1: Build a distributed ship power monitoring system based on synchronous acquisition, including a reinforced computer, a fault recording device, an insulation information comprehensive processing module, a signal acquisition module, a regional monitor, an insulation monitoring module, a sensor, a display, and a UPS power supply; the fault recording device is connected to the reinforced computer and the signal acquisition module through the network; the signal receiving end of the signal acquisition module is connected to the signal sending end of the sensor; the insulation information comprehensive processing module is connected to the reinforced computer and the insulation monitoring module through the CAN bus; the regional monitor is connected to the reinforced computer through the network, and is connected to the power system equipment through the CAN bus, the network, and the serial port respectively; the display is connected to the reinforced computer through the video interface; the UPS power supply includes a battery pack and a control module; the power input end of the UPS power supply is connected to two AC power lines; the power input end of the battery pack is connected to the second DC power line, and the power output end of the UPS power supply is respectively connected to the first DC power line and the DC power output of the battery pack; the first DC power output end of the UPS power supply is respectively connected to the power supply end of the reinforced computer, the insulation information comprehensive processing module, and the display; the DC power output end of the battery pack of the UPS power supply is respectively connected to the power supply end of the fault recording device, the signal acquisition module, and the sensor;
[0011] S2: The system is powered on. The UPS power supply supplies power to the reinforced computer, fault recording device, insulation information comprehensive processing module, signal acquisition module, and sensor. Other components are directly powered by the power system. All devices are initialized.
[0012] S3: The fault recording device synchronizes the time with the signal acquisition module, the signal acquisition module acquires analog signals, the fault recording device receives the acquired data and determines the fault, and alarms the fault; the signal acquisition module acquires the switch signal and performs interlocking control on the power system;
[0013] S4: The insulation information comprehensive processing module issues an insulation measurement instruction, and the insulation monitoring module measures the insulation resistance; the insulation information comprehensive processing module comprehensively judges and processes the insulation information;
[0014] S5: The regional monitor receives the collected digital signal and issues control instructions;
[0015] S6: The reinforced computer comprehensively processes and analyzes the operating status and steady-state operating parameters of the power system, and the display shows the topological structure and operating parameters of the power supply network of the power system.
[0016] Furthermore, in step S3, the specific steps are:
[0017] S31: The fault recording device periodically sends a PTP timing signal to the signal acquisition module to control the signal acquisition module to maintain time synchronization with the fault recording device, and the clock error is at the microsecond level;
[0018] S32: The sensor converts the voltage signal and current signal of the power system into mA-level current analog signals and sends them to the signal acquisition module;
[0019] S33: The signal acquisition module converts the analog signal into a digital signal through the internal high-speed AD at a sampling rate of 40kHz, and sends the data message with a time stamp to the fault recording device;
[0020] S34: The fault recording device receives the data message with a time stamp sent by the signal acquisition module in real time, and performs fault judgment on the data message. If the fault condition is met, the data message within a period of time before and after the fault point is stored in the hard disk of the fault recording device, and the fault information is sent to the reinforcement computer;
[0021] S35: The signal acquisition module collects the switch signal of the power system circuit breaker through the internal programmable logic controller and sends it to the reinforcement computer;
[0022] S36: The programmable logic controllers of different signal acquisition modules exchange information through the CAN bus and perform interlocking control and protection on the power system according to the interlocking logic.
[0023] Furthermore, in step S4, the specific steps are:
[0024] S41: The insulation information comprehensive processing module sends the grid insulation information to the reinforcement computer;
[0025] S42: The insulation information comprehensive processing module periodically sends a measurement instruction to the insulation monitoring module via the CAN bus;
[0026] S43: The insulation monitoring module measures the insulation resistance of the power system busbar using the three-voltage method according to the received measurement instruction; if the busbar insulation resistance is low, the low insulation branch of the power system is located using the dual-frequency method, and the measurement information is fed back to the insulation information comprehensive processing module through the CAN bus;
[0027] S44: The insulation information comprehensive processing module forwards the measurement information to the reinforcement computer.
[0028] Furthermore, in step S5, the specific steps are:
[0029] S51: The regional monitor receives a control instruction from the reinforcement computer;
[0030] S52: The regional monitor sends control instructions to the power system equipment through the CAN bus, the network, and the serial port, and receives the power information sent by the power system equipment;
[0031] S53: The regional monitor forwards the grid steady-state information to the reinforcement computer.
[0032] Furthermore, the method further comprises the following steps:
[0033] An alarm will be triggered when the power system is in an abnormal operating state. The fault information includes power system battery group fault information, power supply network insulation information, power supply network overload and short circuit information, power supply imbalance information, interlocking protection information, and communication abnormality information. After the fault is eliminated, the alarm signal disappears.
[0034] The beneficial effects of the present invention are:
[0035] 1. The distributed ship power monitoring system and method based on synchronous acquisition of the present invention adopts high-precision time synchronization technology to realize the distributed monitoring of transient and steady-state operating parameters of the ship power system for the first time, ensure the synchronization of all monitoring parameters, and realize the functions of distributed monitoring, synchronous acquisition and centralized display of signals.
[0036] 2. The present invention realizes the interlocking protection of the power system, the continued operation after power failure, and other functions by distributed measurement, collection, centralized display and management of the power system, and centrally displays all information on the main unit of the distributed ship power monitoring system, thereby improving the information integration and automation level of the power system. It adopts information comprehensive integration technology, and realizes information integration, distributed control and centralized management of the power system.
[0037] 3. The present invention utilizes distributed control technology to optimize the ship control circuit, reduce the number and complexity of ship cabin cables and monitoring equipment interfaces, increase the reliability and redundancy of control, and ensure stable and reliable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS
[0038] Figure 1 It is a composition diagram of an embodiment of the present invention.
[0039] Figure 2 is a flow chart of an embodiment of the present invention.
[0040] Figure 3 It is a front view of the signal acquisition module of an embodiment of the present invention.
[0041] Figure 4 4 is a top view of the signal acquisition module according to an embodiment of the present invention.
[0042] Figure 5 4 is a front view of the area monitor according to an embodiment of the present invention.
[0043] Figure 6 4 is a rear view of the area monitor according to the embodiment of the present invention.
[0044] In the figure: 1. Cabinet; 2. Reinforced computer; 3. Fault recording device; 4. UPS power supply; 5. Insulation information comprehensive processing module; 6. Signal acquisition module; 7. Area monitor; 8. Insulation monitoring module; 9. Sensor combination; 10. Display screen. DETAILED DESCRIPTION
[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0046] See also Figure 1 The embodiment of the present invention includes a cabinet 1, a reinforced computer 2, a fault recording device 3, a UPS power supply 4, an insulation information comprehensive processing module 5, a signal acquisition module 6, a regional monitor 7, an insulation monitoring module 8, a sensor 9, and a display screen 10.
[0047] The cabinet 1 is used to provide installation space for the reinforcement computer 2, the fault recording device 3, the UPS power supply 4, and the insulation information comprehensive processing module 5. The equipment in the cabinet 1 is installed in a slide rail style.
[0048] The reinforced computer 2 serves as the control, display and alarm center of the entire power monitoring system. It receives the power grid fault information sent by the fault recording device 3 through Ethernet; receives the power grid steady-state information sent by the regional monitor 7 through Ethernet, and sends control instructions to the regional monitor 7 through Ethernet; and receives the power grid insulation information sent by the insulation information comprehensive processing module 5 through the CAN bus.
[0049] The fault recording device 3 periodically sends PTP timing information to the signal acquisition module 6 via Ethernet, so that the clock of each signal acquisition module 6 keeps time synchronization with the fault recording device 3. The fault recording device 3 receives the data message with time stamp sent by each signal acquisition module 6 in real time, and performs fault judgment on the collected data message. If the fault condition is met, the data message within a period of time before and after the fault point is stored in the hard disk of the fault recording device, and the fault information is sent to the reinforcement computer 2.
[0050] The UPS power supply 4 uses two AC power inputs, selects one of them and converts it into DC power, and the UPS power supply 4 has two DC outputs. One of the DC outputs is conventional DC power, and when the AC input loses power, the DC output automatically cuts off; the other DC output charges the components (battery pack) in the UPS power supply 4, and automatically selects DC or battery pack for output through the components in the UPS power supply 4. The conventional DC power of the UPS power supply 4 powers the insulation information comprehensive processing module 5, the reinforced computer 2, and the display screen 10 in the power monitoring cabinet; the DC power with the battery pack powers the fault recording device 3, the signal acquisition module 6, and the sensor 9 connected to the signal acquisition module 6, realizing uninterrupted power supply for the fault recording function.
[0051] The insulation information comprehensive processing module 5 periodically sends measurement instructions to the insulation monitoring module 8 via the CAN bus. At the same time, the insulation information comprehensive processing module 5 receives the measurement information sent by the insulation monitoring module 8 via the CAN bus, and sends the measurement information to the reinforcement computer 2 via the CAN bus.
[0052] See also Figure 3 and Figure 4 The signal acquisition module 6 collects the analog signals output by each sensor 9 through the built-in high-speed AD, converts the collected signals into fixed-format messages, adds timestamps, and sends them to the fault recording device 3. In addition, the signal acquisition module 6 has a built-in programmable logic controller to collect the switch signals of the power system circuit breaker. The programmable logic controllers in each signal acquisition module 6 realize information exchange through the CAN bus, and realize the interlocking control protection of the power system according to the interlocking logic set by the software.
[0053] See also Figure 5 and Figure 6 The regional monitor 7 receives the power information sent by the power system equipment through the CAN bus, Ethernet, serial port, etc., and sends control instructions to the power system equipment through the CAN bus, Ethernet, serial port, etc. In addition, the regional monitor 7 also exchanges information with the reinforcement computer 2 through Ethernet.
[0054] The insulation monitoring module 8 measures the insulation resistance of the power system busbar using the three-voltage method according to the measurement instructions of the insulation information comprehensive processing module 5. If the busbar insulation resistance is low, the low-insulation branch of the power system is located using the dual-frequency method, and the measurement information is sent to the insulation information comprehensive processing module 5 through the CAN bus.
[0055] The sensor module 9 is used to assist the power monitoring system in measuring the main operating parameters (voltage, current) of the power system, and includes a voltage sensor, a current sensor, a special sensor for insulation monitoring, and the like.
[0056] The display screen 10 displays the power system status information transmitted by the reinforcement computer 2 through a video interface.
[0057] The functions of the power monitoring system of the embodiment of the present invention mainly include monitoring function, control function, display and communication function. After the system is powered on, the power system is monitored and controlled; the control function includes the automatic issuance of software control instructions and the interlocking control protection of the power system; the display function is to display all the status information of the power system after comprehensive processing by the software in the reinforced computer; the monitoring function automatically starts to measure, record and judge after the system is powered on.
[0058] The functions of this embodiment mainly include:
[0059] 1) Collection and processing of power grid operation status and main steady-state operation parameters;
[0060] 2) Display of the main power supply network topology and operating parameters of the power system;
[0061] 3) Over-limit alarm for the main operating parameters of the power system, and alarm prompts for over-limit parameters;
[0062] 4) Collect and process transient parameters of the power system, and make fault judgments and records;
[0063] 5) Power system insulation monitoring function;
[0064] 6) Important equipment has the ability to continue working even when power is off.
[0065] The fault alarm function of this embodiment involves alarms when the power system is in an abnormal operating state. The main fault information includes alarms for power system battery packs, power supply network insulation, power supply network overload and short circuit, power supply imbalance, interlocking protection, communication abnormality, etc. After the fault is eliminated, the corresponding alarm signal and the sound and light alarm signal disappear.
[0066] The communication function of this embodiment involves communication and information interaction with external devices, and information interaction and sharing with external devices are achieved through a communication interface.
[0067] The monitoring method of the present invention comprises the following steps:
[0068] The principle of the distributed ship power monitoring system is as follows: after power is turned on, the UPS power supply 4 supplies power to the reinforcement computer 2, the fault recording device 3, the insulation information comprehensive processing module 5, the signal acquisition module 6, and the sensor 9, and other components are directly powered by the power system, and all devices are initialized; the signal acquisition module 6 is used to realize analog quantity acquisition and power system interlocking control, and send the collected information to the reinforcement computer 2 in the power monitoring cabinet; the area monitor 7 is used to realize the acquisition of digital quantity signals and the issuance of control instructions; the insulation monitoring module 8 is used to complete the measurement of insulation resistance; the fault recording device 3 is used to realize the time synchronization of all signal acquisition modules 6 and the reception and fault judgment of collected data; the insulation information comprehensive processing module 5 is used to complete the issuance of insulation measurement instructions and the comprehensive judgment and processing of insulation information; the reinforcement computer 2 is used to realize the comprehensive processing and analysis of the status of the entire power system; the display screen 10 is used to realize the display of all states of the power system.
[0069] The distributed ship power monitoring system uses the fault recording device 3, the signal acquisition module 6, and the sensor 9 to realize the synchronous acquisition of voltage, current and other signals. The process of the distributed ship power monitoring system to realize the synchronous acquisition of signals is as follows: Figure 2 As shown, the main process is as follows:
[0070] 1) The fault recording device 3 periodically sends a PTP timing signal to the signal acquisition module 6 to ensure that the clock error between each signal acquisition module 6 is at the microsecond level.
[0071] 2) The sensor 9 converts the voltage signal and current signal of the power system into mA-level current signals and sends them to the signal acquisition module 6.
[0072] 3) The signal acquisition module 6 converts the analog signal into a digital signal at a sampling rate of 40 kHz, and sends the digital signal to the fault recording device 3 in a certain frame format (including a timestamp).
[0073] The above embodiments are only used to illustrate the design ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or modifications made based on the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.
Claims
1. A distributed ship power monitoring system based on synchronous acquisition, Features: It includes a reinforcement computer, a fault recording device, an insulation information comprehensive processing module, a signal acquisition module, an area monitor, an insulation monitoring module, a sensor, and a display; The fault recording device is connected to the reinforcement computer through the network, and is used to send power grid fault information to the reinforcement computer; the fault recording device is connected to the signal acquisition module through the network, and is used to periodically send PTP time synchronization information to the signal acquisition module, so that the clock of the signal acquisition module and the fault recording device are synchronized in time; the fault recording device is also used to receive the data message with time stamp sent by the signal acquisition module in real time, and perform fault judgment on the data message. If the fault condition is met, the data message within a period of time before and after the fault point is stored in the hard disk of the fault recording device, and the fault information is sent to the reinforcement computer; The signal receiving end of the signal acquisition module is connected to the signal sending end of the sensor; the signal acquisition module includes a high-speed AD, which is used to collect analog signals from the sensor, and convert the analog signals into data messages in a fixed format, and send them to the fault recording device after adding a time stamp; the signal acquisition module also includes a programmable logic controller, which is used to collect switch signals of power system circuit breakers; the programmable logic controllers of different signal acquisition modules realize information exchange through the CAN bus, and realize the interlocking control protection of the power system according to the interlocking logic; the insulation information comprehensive processing module is connected to the reinforcement computer through the CAN bus, and is used to send power grid insulation information to the reinforcement computer; the insulation information comprehensive processing module is connected to the insulation monitoring module through the CAN bus, and is used to periodically send measurement instructions to the insulation monitoring module, receive measurement information fed back by the insulation monitoring module, and forward the measurement information to the reinforcement computer; The insulation monitoring module is used to measure the insulation resistance of the power system busbar using the three-voltage method according to the received measurement instructions; if the busbar insulation resistance is low, the low insulation branch of the power system is located by the dual-frequency method, and the measurement information is fed back to the insulation information comprehensive processing module through the CAN bus; The regional monitor is connected to the reinforcement computer through the network to send the grid steady-state information to the reinforcement computer and receive control instructions; the regional monitor is connected to the power system equipment through the CAN bus, network and serial port respectively to send control instructions to the power system equipment and receive the power information sent by the power system equipment; The display is connected to the reinforced computer via a video interface to receive and display power system status information.
2. According to claim 1, a distributed ship power monitoring system based on synchronous acquisition, Features: The sensors include voltage sensors, current sensors, and insulation monitoring sensors, which are used to measure power system operating parameters including voltage, current, and insulation impedance.
3. According to claim 1, a distributed ship power monitoring system based on synchronous acquisition, Features: It also includes a UPS power supply, which includes a battery pack and a control module; the power input end of the UPS power supply is connected to two AC power supplies for converting the two AC power supplies into two DC power supplies respectively; the power input end of the battery pack is connected to the second DC power supply, and the power output end of the UPS power supply is respectively connected to the first DC power supply and the DC power output of the battery pack; the control module is used to select the output of the first DC power supply and / or the DC power of the battery pack; the first DC power output end of the UPS power supply is respectively connected to the power supply end of the reinforced computer, the insulation information comprehensive processing module, and the display; the DC power output end of the battery pack of the UPS power supply is respectively connected to the power supply end of the fault recording device, the signal acquisition module, and the sensor, for providing uninterrupted power supply for the fault recording function.
4. A distributed ship power monitoring system based on synchronous acquisition according to claim 3, Features: It also includes a cabinet body, which is provided with slide rails for installing a reinforced computer, a fault recording device, an insulation information comprehensive processing module, and a UPS power supply.
5. A monitoring method for a distributed ship power monitoring system based on synchronous acquisition according to any one of claims 1 to 4, Features: The following steps are involved: S1: Build a distributed ship power monitoring system based on synchronous acquisition, including a reinforced computer, a fault recording device, an insulation information comprehensive processing module, a signal acquisition module, a regional monitor, an insulation monitoring module, a sensor, a display, and a UPS power supply; the fault recording device is connected to the reinforced computer and the signal acquisition module through the network; the signal receiving end of the signal acquisition module is connected to the signal sending end of the sensor; the insulation information comprehensive processing module is connected to the reinforced computer and the insulation monitoring module through the CAN bus; the regional monitor is connected to the reinforced computer through the network, and is connected to the power system equipment through the CAN bus, the network, and the serial port respectively; the display is connected to the reinforced computer through the video interface; the UPS power supply includes a battery pack and a control module; the power input end of the UPS power supply is connected to two AC power lines; the power input end of the battery pack is connected to the second DC power line, and the power output end of the UPS power supply is respectively connected to the first DC power line and the DC power output of the battery pack; the first DC power output end of the UPS power supply is respectively connected to the power supply end of the reinforced computer, the insulation information comprehensive processing module, and the display; the DC power output end of the battery pack of the UPS power supply is respectively connected to the power supply end of the fault recording device, the signal acquisition module, and the sensor; S2: The system is powered on. The UPS power supply supplies power to the reinforced computer, fault recording device, insulation information comprehensive processing module, signal acquisition module, and sensor. Other components are directly powered by the power system. All devices are initialized. S3: The fault recording device synchronizes the time with the signal acquisition module, the signal acquisition module acquires analog signals, the fault recording device receives the acquired data and determines the fault, and alarms the fault; the signal acquisition module acquires the switch signal and performs interlocking control on the power system; S4: The insulation information comprehensive processing module issues an insulation measurement instruction, and the insulation monitoring module measures the insulation resistance; the insulation information comprehensive processing module comprehensively judges and processes the insulation information; S5: The regional monitor issues control instructions based on the received collected digital quantity signals; S6: The reinforced computer comprehensively processes and analyzes the operating status and steady-state operating parameters of the power system, and the display shows the topological structure and operating parameters of the power supply network of the power system.
6. The monitoring method according to claim 5, Features: In the step S3, the specific steps are: S31: The fault recording device periodically sends a PTP timing signal to the signal acquisition module to control the signal acquisition module to maintain time synchronization with the fault recording device, and the clock error is at the microsecond level; S32: The sensor converts the voltage signal and current signal of the power system into mA-level current analog signals and sends them to the signal acquisition module; S33: The signal acquisition module converts the analog signal into a digital signal through the internal high-speed AD at a sampling rate of 40kHz, and sends the data message with a time stamp to the fault recording device; S34: The fault recording device receives the data message with a time stamp sent by the signal acquisition module in real time, and performs fault judgment on the data message. If the fault condition is met, the data message within a period of time before and after the fault point is stored in the hard disk of the fault recording device, and the fault information is sent to the reinforcement computer; S35: The signal acquisition module collects the switch signal of the power system circuit breaker through the internal programmable logic controller and sends it to the reinforcement computer; S36: The programmable logic controllers of different signal acquisition modules exchange information through the CAN bus and perform interlocking control and protection on the power system according to the interlocking logic.
7. The monitoring method according to claim 5, Features: In the step S4, the specific steps are: S41: The insulation information comprehensive processing module sends the grid insulation information to the reinforcement computer; S42: The insulation information comprehensive processing module periodically sends a measurement instruction to the insulation monitoring module via the CAN bus; S43: The insulation monitoring module measures the insulation resistance of the power system busbar using the three-voltage method according to the received measurement instruction; if the busbar insulation resistance is low, the low insulation branch of the power system is located using the dual-frequency method, and the measurement information is fed back to the insulation information comprehensive processing module through the CAN bus; S44: The insulation information comprehensive processing module forwards the measurement information to the reinforcement computer.
8. The monitoring method according to claim 5, Features: In the step S5, the specific steps are: S51: The regional monitor receives a control instruction from the reinforcement computer; S52: The regional monitor sends control instructions to the power system equipment through the CAN bus, the network, and the serial port, and receives the power information sent by the power system equipment; S53: The regional monitor forwards the grid steady-state information to the reinforcement computer.
9. The monitoring method according to claim 5, Features: The following steps are also included: An alarm will be triggered when the power system is in an abnormal operating state. The fault information includes power system battery group fault information, power supply network insulation information, power supply network overload and short circuit information, power supply imbalance information, interlocking protection information, and communication abnormality information. After the fault is eliminated, the alarm signal disappears.