Intelligent rapid emergency power supply system for monitoring high-voltage short-circuit characteristic information by group method

Abstract

The invention provides an intelligent rapid emergency power supply system for monitoring high-voltage short-circuit characteristic information through a group method, and relates to the field of power electronic technologies and uninterruptible power supplies, intelligent identification module groups X1-X27 used for monitoring short-circuit fault characteristic information of a high-voltage power supply network are additionally arranged in a standard ISPS, and the intelligent identification module groups X1-X27 are grouped according to attributes of the characteristic information; the characteristic information from each intelligent identification module is used for controlling the rapid conversion of the standard ISPS output end, so that the output end conversion index under the high-voltage short-circuit working condition can also meet Tlt; the time is 0.01 ms; the system comprises the intelligent identification module group, and an intelligent controller IPo, a composite rapid circuit changer Cf and an abnormal emergency branch Ae which are related to the intelligent identification module group, and also comprises a commercial power direct transmission branch Dt, monitoring instruments IA, IA1-IA3, an intelligent storage battery unit IIU and other matched components or units which are necessary for a standard ISPS.

Description

Technical Field

[0001] The present application relates to the fields of power electronics and uninterruptible power supplies, and primarily to the technology of monitoring and analyzing short-circuit fault characteristic information of an upstream high-voltage power supply network by a lower-level power supply network, and in particular to the technology of utilizing the short-circuit fault characteristic information of a high-voltage power supply network to control the conversion of the ISPS output terminal in advance. Technical Background

[0002] like Figure 1 As shown, the Technical Standard for the Intelligent Swift Emergency Power System (ISPS) (T / ASC 04-2019) stipulates that "serious parameter anomaly" information appearing immediately before a power outage can be used to initiate ISPS output switching, ensuring that the resulting power interruption time (T) is ≤ 10ms (a requirement specified in relevant design specifications and standards). Considering that some older critical load equipment is at the end of its life, experiencing severe functional degradation, significant internal electronic device parameter drift, and the potential for a 1ms power outage to cause a major accident, T / ASC 04-2019 further stipulates that for power outages caused by grid faults (short circuits or open circuits) (excluding human-caused outages), ISPS output switching can be initiated earlier, as "serious parameter anomaly" information can appear more than 100 milliseconds before the power outage occurs. Therefore, for power outages caused by grid faults, ISPS output switching must meet a T < 0.01ms, minimizing the risk of power interruption to older, specialized equipment. However, this regulation cannot be implemented for the protection tripping and power outage caused by short-circuit faults in the high-voltage power supply network. The reason is that there are one or more transformers and power supply lines of different voltage levels between the short-circuit point of the high-voltage power supply network and the ~380 / 220V distribution network (hereinafter referred to as the "terminal network") where the ISPS is located. Affected by the transition process factors, the "serious parameter abnormality" information will not appear in the terminal network until hundreds of milliseconds after the short circuit occurs. However, at this time, the voltage has dropped to below 80% or even lower. The physical power outage is at the end of the period. In this case, the rapid conversion of the ISPS output end can no longer meet the requirements and regulations of T<0.01ms. If the high-voltage power supply network Figure 2 shown.

[0003] Therefore, in order to ensure that the power supply to old and important loads will not be interrupted even when a high-voltage network short-circuit fault occurs, the ISPS cannot simply rely on the "serious parameter abnormality" information of the terminal network to start the output end conversion, but should find characteristic information that represents the high-voltage power supply network short-circuit fault but is not affected by the transition process. When a high-voltage short-circuit causes a trip and power outage, the ISPS output end conversion can be started in advance using this characteristic information to ensure that the ISPS output end conversion index meets the T<0.01ms requirement.

[0004] Practice has proven that, in any of the four types of short circuits in the high-voltage power supply network, due to the powerful short-circuit power and its electromagnetic field, one or more sets of characteristic information will, at the moment of occurrence, break through the constraints of the transient process and be transmitted via lines and transformers to distant locations, including the terminal network. The attributes of this characteristic information include, but are not limited to, current variation, voltage variation, impedance mutation, and harmonic mutation. Each type of information manifests itself in distinct forms within the A, B, and C phases, or between phases, for each type of short-circuit fault. While these information possesses distinct attributes, forms, and characteristics, they share the common characteristic of being unaffected by the transient process and uniquely representing a short circuit in the high-voltage power supply network. This is therefore referred to as characteristic information of a high-voltage power supply network short circuit (referred to as characteristic information). Because this characteristic information is transmitted to the terminal network far before the "serious parameter anomaly" message appears, using it to initiate ISPS output switching ensures that the ISPS output switching specification meets T < 0.01ms even under high-voltage short-circuit conditions. Summary of the Invention

[0005] The problem to be solved by this application is that, in order to address the practical difficulty that the standard ISPS cannot guarantee the output end conversion index T<0.01ms when a high-voltage short circuit causes a trip and power outage, an intelligent fast emergency power supply system (ISPS) is provided that monitors the high-voltage short circuit characteristic information by a group method.

[0006] The present application provides an intelligent rapid emergency power supply system (ISPS) that monitors high-voltage short-circuit characteristic information using a group method. This system adds an intelligent module group X1 to X27 to monitor the characteristic information of high-voltage power supply network short-circuit faults within the standard ISPS. The characteristic information captured by the intelligent module group X1 to X27 is grouped by attributes. By analyzing the attributes, individuality, and characteristics of the characteristic information of each module within the module group, the type, location, and nature of the high-voltage short-circuit fault can be instantly determined. This result can assist dispatchers or automatic dispatch systems in forming rapid response plans during smart grid management and dispatch. In this application, the analysis results of the characteristic information are used to automatically select the time to start the ISPS output terminal conversion in advance. Any two characteristic information in the intelligent module group can also be used as the basis for controlling the early conversion of the ISPS output terminal (i.e., as long as two or more intelligent modules capture the characteristic information, the ISPS output terminal can be immediately controlled to convert in advance). This solves the practical problem that the standard ISPS cannot guarantee the indicator T < 0.01ms when a high-voltage network short circuit occurs.

[0007] Compared with the standard ISPS, one of the innovations of the present invention is that an intelligent module group X1 to X27 for monitoring high-voltage short-circuit characteristic information is added to the power supply input side or the mains direct transmission branch of the standard ISPS. The high-voltage short-circuit characteristic information captured by the intelligent module group is used to start the conversion of the ISPS output end in advance; the second innovation is that the system's intelligent controller IPo is independent of the output end conversion unit and independently monitors, analyzes, calculates, processes, controls, and coordinates the entire system (including each unit, component, module or chip, and instrument, etc.); the third innovation is that the composite fast circuit changer Cf only exists as an execution device or unit controlled by the intelligent controller IPo and has no internal self-control function; the fourth innovation is that the abnormal emergency branch Ae has a brief moment of continuous hot online working mode, that is, when the characteristic information appears but the duration has not reached the set value, the "AC-DC-AC" hot online output mode is continuously maintained. Therefore, this system is mainly composed of intelligent modules X1-X27, intelligent controller IPo, composite fast switch Cf, and abnormal emergency branch Ae. It also includes the mains direct transmission branch Dt, monitoring instruments IA and IA2, IA1 and IA3, smart battery unit IIU, and related switches and other supporting components or units required by the standard ISPS.

[0008] Under the control of the intelligent controller IPo, if the mains power is normal, the ISPS system operates in the mains direct power supply mode; the moment the short-circuit fault characteristic information of the high-voltage power supply network from X1 to X27 is detected, the system enters the abnormal emergency power supply mode; the moment the duration of the abnormal emergency power supply mode reaches the set value, or the moment the mains "serious parameter abnormality" information from IA1 and IA3 is detected, the ISPS system automatically enters the battery inverter emergency power supply mode and simultaneously shuts down the impact-resistant rectifier RU; during the abnormal emergency power supply mode or the battery inverter emergency power supply mode, if the mains power from IA is detected to be restored and the parameters are normal, the ISPS system automatically switches back to the mains direct power supply mode.

[0009] The intelligent modules (X1-X27) are software-embedded, intelligent power electronic chips or modules, or intelligent meters with embedded computer functions, capable of processing, computing, and editing. They are referred to as "intelligent modules." Their output signals can be software-defined and edited, representing the strength of relevant physical signals, such as a 4-20mA dynamic current signal or a 1-5V dynamic voltage signal. They can also be directly converted into alarm signals requesting an interruption from the IPo. Each individual module can be installed anywhere near the power line on the mains direct transmission branch or incoming power supply side, with its signal output terminals connected to the control signal lines of the intelligent controller IPo.

[0010] In this application, the intelligent modules X1, X2, and X3 are used to monitor the current variation characteristics of different polarities in the A phase power line; X4, X5, and X6 are used to monitor the current variation characteristics of different polarities in the B phase power line; X7, X8, and X9 are used to monitor the current variation characteristics of different polarities in the C phase power line; X10, X11, and X12 are used to monitor the voltage variation characteristics of different polarities in the A phase line; X13, X14, and X15 are used to monitor the voltage variation characteristics of different polarities in the B phase line; X16, X17, and X18 are used to monitor the voltage variation characteristics of different polarities in the C phase line. Variation characteristic information; X19 is used to monitor the impedance mutation characteristic information of phase A line; X20 is used to monitor the impedance mutation characteristic information of phase B line; X21 is used to monitor the impedance mutation characteristic information of phase C line; X22 is used to monitor the impedance mutation characteristic information between phase A and phase B lines; X23 is used to monitor the impedance mutation characteristic information between phase B and phase C lines; X24 is used to monitor the impedance mutation characteristic information between phase C and phase A lines; X25 is used to monitor the harmonic mutation characteristic information of phase A line; X26 is used to monitor the harmonic mutation characteristic information of phase B line; X27 is used to monitor the harmonic mutation characteristic information of phase C line.

[0011] The intelligent controller IPo can be a single-chip microcomputer, microcomputer, industrial control computer, editable logic controller, logic control module with analysis, calculation, and judgment functions, or intelligent instrument with embedded computer chip. Its functions in this application include: controlling the orderly operation of all components, modules, and units; monitoring the information of all intelligent module groups and monitoring instruments; and controlling the timely conversion of the ISPS system output. Its control signal lines connect the intelligent module groups X1-X27, the contactless switches I1 and I2 in the composite fast-switch, the contact switches Q1 and Q2, the impact-resistant rectifier RU, the enhanced inverter ELn, and the filter LC in the abnormal emergency branch Ae, as well as the intelligent battery unit IIU and its internal controlled switches.

[0012] The AC power direct transmission branch consists only of switch S1 and associated wires. It is a channel for directly transmitting AC power to important loads, that is, a AC power transmission channel in the cold online power supply mode. The input end of S1 is directly connected to the output end of the power incoming switch K01, and the output end of S1 is directly connected to the input end of the load switch ICS1 in the composite fast circuit changer Cf (the parallel input end of the contact switch Q1 and the contactless switch I1).

[0013] The abnormal emergency branch consists of a surge-resistant rectifier RU, an enhanced inverter ELn, and a filter LC, connected in series. This serves as the channel for converting and transmitting AC power. The RU's input is connected to the output of the power inlet switch K01. The RU's output is connected, via ELn and LC, to the input of ICS2 within the composite fast-acting circuit breaker Cf (i.e., the parallel inputs of the contactor switch Q2 and the contactless switch I2). The RU is a surge-resistant rectifier, designed for use in applications where surge currents are present during output switching. Otherwise, any type of rectifier can be used. The ELn is an enhanced inverter, designed for use in applications where critical loads may be overloaded during an emergency. If the critical loads are identical under normal and emergency conditions, any type of inverter can be used. The LC is a universal filter.

[0014] The intelligent battery unit (IIU) is an energy storage unit that integrates the functions of the battery pack (BM), intelligent charger (IC), and battery online protector (BP) described in T / ASC 04-2019. In this application, it serves only as a required energy storage unit for the ISPS and is not described in detail. Preferably, the intelligent battery unit (IIU) can also be a conventional lead-acid battery pack or a lithium-ion battery pack, provided that the functional requirements are met.

[0015] The composite fast circuit breaker Cf is composed of a composite switch ICS1 and a composite switch ICS2. ICS1 is composed of a contact switch Q1 and a contactless switch I1 connected in parallel. The contactless switch Q1 is used to continuously carry the load current in the AC direct transmission mode, and I1 is used to convert the load current at the output end. The input end of the composite switch ICS1 (i.e., the parallel input ends of the contactless switch I1 and the contactless switch Q1) is connected to the output end of the switch S1 in the AC direct transmission branch. The composite switch ICS2 is composed of a contact switch Q2 and a contactless switch I2 connected in parallel. The contactless switch Q2 is used to continuously carry the load current in the abnormal emergency mode and the battery inverter emergency mode, and the contactless switch I2 is used to convert the load current at the instant. The input end of the composite switch ICS2 (i.e., the parallel input ends of the contactless switch I2 and the contactless switch Q2) is connected to the output end of the filter LC in the abnormal emergency branch Ae. The output ends of the composite switches ICS1 and ICS2 are connected in parallel and then connected to the input end of the output switch S2. The contactless switch I1 and the contactless switch I2 are dual-control power electronic switch devices or modules, including but not limited to power MOS, IGBT, IPM, IGCT, IEBT and gallium nitride, silicon carbide type power semiconductor devices or modules, and their control signal lines are connected to the intelligent controller IPo; the contact switch Q1 and the contact switch Q2 are electrically controlled electromechanical switches, including but not limited to contactors, magnetic starters, relays, magnetic saturation relays, electric transfer switches, etc., and the control contacts of their controlled coils are connected to the intelligent controller IPo through control signal lines.

[0016] The monitoring instrument IA, monitoring instrument IA1, monitoring instrument IA2 and monitoring instrument IA3 can be DDC-Ⅲ or DDC-Ⅳ type automatic instruments or other types of modern intelligent instruments. In the present application, the monitoring instrument IA is used to monitor dynamic parameters such as current, voltage, active power, reactive power, power factor and battery voltage. The monitoring instrument IA2 is only used to monitor dynamic parameters under the inverter output mode. The monitoring instrument IA1 and monitoring instrument IA3 are used to capture the "serious abnormality of parameters" information before the fault power outage. Among them, the display panel of the monitoring instrument IA and the monitoring instrument IA2 is set on the ISPS cabinet surface, and the primary monitoring element is set in the ISPS cabinet. The monitoring instrument IA1 and the monitoring instrument IA3 only contain the primary monitoring element in the cabinet, and there is no need to set a display panel. The primary and secondary wire connections of all monitoring instruments are the normal connections commonly used in various engineering applications in the industry, or they can be connected according to the product instruction manual.

[0017] The AC direct power supply mode means that the AC power introduced through the power supply line switch K01 is directly connected to the important load through the switch S1, the contact switch Q1 of the composite switch ICS1 in the composite fast circuit changer Cf, and the output switch S2. The energy flow path is: K01→S1→Q1→S2.

[0018] The abnormal emergency power supply mode means that the mains power introduced through the power supply line switch K01 is connected to the important load through the RU, ELn, LC of the abnormal emergency branch, the contact switch Q2 of ICS2 in the composite fast circuit switch Cf, and the output switch S2. The mains power energy flow path is: K01→RU→ELn→LC→Q2→S2. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a standard ISPS diagram drawn in accordance with the provisions of the standard "T / ASC 04-2019";

[0020] Figure 2 This is a schematic diagram of the high voltage power supply network;

[0021] Figure 3 Schematic diagram of the ISPS principle for this application;

[0022] Figure 4 Schematic diagram of the layout of the intelligent module group for monitoring high-voltage short-circuit characteristic information along the A phase (L1), B phase (L2) and C phase (L3) lines or anywhere in between. DETAILED DESCRIPTION

[0023] 1) Implementation of the main circuit system (see Figure 3 ).

[0024] like Figure 3As shown, after the mains power is introduced through the incoming switch K01, it splits into two branches: one is connected to the input of switch S1 in the direct mains transmission branch Dt, and the other is connected to the input of the surge-resistant rectifier RU in the emergency branch Ae. The output of S1 is directly connected to the input of the composite switch ICS1 in the composite fast-acting circuit breaker Cf (i.e., the parallel inputs of contactor switch Q1 and contactless switch I1). The output of the RU is connected to the input of the enhanced inverter ELn and the discharge port of the smart battery unit. The output of ELn is connected to the input of the filter LC, and the output of LC is connected to the input of the composite switch ICS2 in Cf (i.e., the parallel inputs of contactor switch Q2 and contactless switch I2). The outputs of I1, Q1, Q2, and I2 in Cf are connected in parallel and then to the input of the output switch S2. The output of S2 is connected to the load distribution box.

[0025] 2) Implementation of the control signal system (see Figure 3 ).

[0026] Monitoring instrument IA, used to monitor operating parameters such as current, voltage, active power, reactive power, power factor, and battery voltage, and monitoring instrument IA2, used to monitor inverter output parameters, have display panels installed on the ISPS cabinet panel, with primary monitoring components located within the ISPS cabinet. Monitoring instruments IA1 and IA3, used to detect "serious parameter anomalies," only have primary monitoring components within the cabinet and do not require display panels. The primary and secondary wiring connections for each monitoring instrument follow standard connections commonly used in various engineering applications, or can be connected according to the product manual. The output signal lines of all monitoring instruments are connected to the control signal lines of the intelligent controller IPo. The IPo control signal lines also connect to the contactless switches I1 and I2 and contact switches Q1 and Q2 within the composite fast-acting circuit breaker Cf; to the signal output terminals X1 to X27 of the intelligent module group used to monitor high-voltage network short-circuit characteristics; and to the surge-resistant rectifier RU, enhanced inverter ELn, filter LC, intelligent battery unit IIU, and internal controlled switches.

[0027] 3) Implementation of the intelligent module group X1 to X27 (see Figure 4 ).

[0028] In the intelligent module group used to monitor high-voltage short-circuit characteristic information, the electrical quantity type (current and voltage) is the inductive type, and the impedance type and harmonic type are the contact type. Among them, X1, X2, and X3 monitor the current variation characteristic information of phase A; X4, X5, and X6 monitor the current variation characteristic information of phase B; X7, X8, and X9 monitor the current variation characteristic information of phase C; X10, X11, and X12 monitor the voltage variation characteristic information of phase A; X13, X14, and X15 monitor the voltage variation characteristic information of phase B; X16, X17, and X18 monitor the current variation characteristic information of phase C; X19 monitors the impedance mutation characteristic information of phase A. X20 monitors impedance mutation characteristics of Phase B; X21 monitors impedance mutation characteristics of Phase C; X22 monitors impedance mutation characteristics between Phases A and B; X23 monitors impedance mutation characteristics between Phases B and C; X24 monitors impedance mutation characteristics between Phases C and A; X25 monitors harmonic mutation characteristics of Phase A; X26 monitors harmonic mutation characteristics of Phase B; and X27 monitors harmonic mutation characteristics of Phase C. Among the aforementioned characteristics, electrical quantity characteristics (current or voltage) have polarity differences, while non-electrical quantity characteristics do not.

[0029] The operating mode and output end conversion conditions of the ISPS of the present application constructed according to the above implementation manner are as follows.

[0030] 1) Mains Direct Transmission Mode: Under normal conditions, the system operates in the aforementioned mains direct transmission mode. After external grid power is introduced through the power supply inlet switch K01, it passes through the switch S1 in the mains direct transmission branch Dt, the contact switch Q1 in the composite fast-acting circuit breaker Cf, and the output switch S2 to reach the load.

[0031] 2) Abnormal Emergency Mode: At the moment IPo obtains the characteristic information from X1-X27, the composite switch ICS1 (composed of a contact switch Q1 and a non-contact switch in parallel) and the composite switch ICS2 (composed of a contact switch Q2 and a non-contact switch I2 in parallel) within the composite fast circuit breaker Cf undergo a positive transition (I1 on → Q1 off → I1 off → I2 on → Q2 on → I2 off), and the system enters abnormal emergency power supply mode. At this point, external grid power is introduced through the power supply incoming switch K01 and passes through the surge-resistant rectifier RU, enhanced inverter ELn, and filter LC of the abnormal emergency branch Ae, Q2 within Cf, and output switch S2 to the critical load cabinet.

[0032] 3) Battery emergency mode: If the duration of the characteristic information reaches the set value, or the IPo obtains the "serious parameter abnormality" information from the monitoring instrument IA1 and / or the monitoring instrument IA3, the ISPS seamlessly switches to the battery inverter power supply mode until the battery energy is exhausted or the system is manually shut down or the grid parameters return to normal.

[0033] 4) Restore AC direct transmission: During the abnormal emergency power supply mode or battery inverter power supply mode, if the AC parameters return to normal, ICS1 and ICS2 in the composite fast circuit switch Cf undergo "negative conversion" (I2 on → Q2 off → I2 off → I1 on → Q1 on → I1 off), and the system returns to the AC direct power supply mode.

[0034] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core concept of this application. At the same time, for those skilled in the art, based on the concept of this application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. An intelligent rapid emergency power supply system for monitoring high-voltage short-circuit characteristic information by group method, characterized in that: Adding intelligent module groups X1 to X27 to monitor the characteristic information of short-circuit faults in the high-voltage power supply network to the standard ISPS, and grouping the intelligent module groups X1 to X27 according to the attributes of the characteristic information. The characteristic information from each intelligent module is used to control the rapid conversion of the standard ISPS output terminal; The intelligent fast emergency power supply system for monitoring high-voltage short-circuit characteristic information using a group method includes an intelligent module group X1-X27 and an intelligent controller IPo, a composite fast switch Cf, and an abnormal emergency branch Ae associated with the intelligent module group X1-X27. It also includes the mains direct transmission branch Dt, monitoring instruments IA, IA1, IA2, IA3, and an intelligent battery unit IIU required by a standard ISPS. When the mains power is normal, the intelligent fast emergency power supply system that monitors the high-voltage short-circuit characteristic information by the group method operates in the mains direct transmission power supply mode; at the moment a short circuit fault occurs in the high-voltage power supply network, the intelligent fast emergency power supply system that monitors the high-voltage short-circuit characteristic information by the group method operates in the abnormal emergency power supply mode; at the moment the characteristic information duration reaches the set value, or the terminal network displays the "serious parameter abnormality" information, the intelligent fast emergency power supply system that monitors the high-voltage short-circuit characteristic information by the group method operates in the battery inverter power supply mode; during the abnormal emergency power supply mode or the battery inverter power supply mode, if the mains power returns to normal, the intelligent fast emergency power supply system that monitors the high-voltage short-circuit characteristic information by the group method automatically switches back to the mains direct transmission power supply mode; under the control of the intelligent controller IPo, the intelligent fast emergency power supply system that monitors the high-voltage short-circuit characteristic information by the group method can seamlessly switch between various power supply modes.

2. The intelligent fast emergency power supply system for monitoring high-voltage short-circuit characteristic information by group method according to claim 1 is characterized in that: Intelligent module groups X1 to X27 specifically include: three intelligent modules for monitoring current variation characteristics, three intelligent modules for monitoring voltage variation characteristics, one intelligent module for monitoring impedance mutation characteristics, and one intelligent module for monitoring harmonic mutation characteristics, respectively, set up in each of phases A, B, and C. One intelligent module for monitoring impedance mutation characteristics is also configured between phases AB, BC, and CA. All intelligent modules are power electronics chips, modules or modern smart meters embedded with software and equipped with processing, computing and editing functions. The output signals of the intelligent module group are 4-20mA dynamic current or 1-5V dynamic voltage, or level signals that directly request an interrupt from IPo. The signal output terminals of the intelligent module group are all connected to the control signal lines of IPo.

3. The intelligent fast emergency power supply system for monitoring high-voltage short-circuit characteristic information by group method according to claim 1 or 2 is characterized in that: The intelligent controller IPo, which has monitoring, receiving, processing, analysis, judgment and control functions, is responsible for controlling the orderly operation of all components, modules and units, monitoring the information of all intelligent modules and monitoring instruments, and controlling the conversion of the ISPS output end according to characteristic information or "serious parameter abnormality" information. The IPo can be a single-chip microcomputer, microcomputer, industrial computer, editable logic controller, logic module with monitoring, receiving, processing, analysis and calculation, judgment and control functions, or intelligent instrument with embedded computer chip.

4. An intelligent fast emergency power supply system for monitoring high-voltage short-circuit characteristic information by a group method according to claim 1, 2 or 3, characterized in that: The composite fast circuit breaker Cf is composed of a composite switch ICS1 and a composite switch ICS2. The composite switch ICS1 is composed of a contact switch Q1 and a non-contact switch I1 connected in parallel. The composite switch ICS2 is composed of a contact switch Q2 and a non-contact switch I2 connected in parallel. The contactless switches I1 and I2 are dual-control power electronic switch devices or modules, including but not limited to power MOS, IGBT, IPM, IGCT, IEBT, gallium nitride, and silicon carbide power semiconductor devices or modules; the control stages of the contactless switches I1 and I2 are connected to the intelligent controller IPo via control signal lines; The contact switch Q1 and the contact switch Q2 are electrically controlled electromechanical switches, including but not limited to contactors, magnetic starters, relays, magnetic saturation relays and electric transfer switches; the control contacts of the controlled coils of the contact switch Q1 and the contact switch Q2 are connected to the control signal lines of the intelligent controller IPo.

5. The intelligent rapid emergency power supply system for monitoring high-voltage short-circuit characteristic information by group method according to claim 1 is characterized in that: The abnormal emergency branch Ae is composed of an anti-shock rectifier RU, an enhanced inverter ELn and a filter LC connected in series; When there is no impact current at the switching moment, the impact-resistant rectifier RU adopts an ordinary rectifier device; and when the important load will not be overloaded in an emergency state, the enhanced inverter ELn adopts an ordinary inverter device; the filter LC is a universal filtering device.

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