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

Abstract

The invention discloses an intelligent rapid emergency power supply system for monitoring high-voltage short-circuit characteristic information through an attribute method. The system comprises intelligent identification module groups X1 to X12, an intelligent controller IPo, a commercial power direct transmission branch Dt, an abnormal emergency branch Ae, a composite rapid circuit changer Cf, an intelligent storage battery unit IIU, and monitoring instruments IA and IA1-IA3. The intelligent identification module groups X1 to X12, the intelligent controller IPo, the commercial power direct transmission branch Dt, the abnormal emergency branch Ae, the composite rapid circuit changer Cf, the intelligent storage battery unit IIU, and the monitoring instruments IA and IA1-IA3. One intelligent recognition module is arranged on each of a three-phase power line of an ISPS power supply incoming line side or a commercial power direct transmission branch according to different attributes of current, voltage, harmonic wave and impedance, and is used for capturing characteristic information of high-voltage network short circuit. In intelligent power grid dispatching, the high-voltage short circuit condition is analyzed and judged and an emergency disposal scheme is determined according to combination of characteristic information attributes of all modules, according to the method, characteristic information is used for starting ISPS output end conversion in advance, and the problem that an index Tlt cannot be guaranteed when a standard ISPS is in a high-voltage short circuit state is solved; and 0.01 ms.

Description

Technical Field

[0001] The present invention relates to modern power electronics technology and uninterruptible power supply technology, and also to monitoring and utilization technology of short-circuit fault characteristic information of upper-level high-voltage power grids by lower-level or terminal networks in smart grids, and in particular to an intelligent fast emergency power supply system that monitors high-voltage short-circuit characteristic information using an attribute method. Background Art

[0002] Today, with the rapid advancement of power and electronics technologies, the resilience of most critical loads to grid conditions has greatly improved, making special requirements for frequency, voltage, and seamless power supply systems no longer necessary. Furthermore, the natural parameters of the power supply network now exceed those required by critical load equipment, making it possible to directly supply power to these loads. Therefore, for most critical loads in power supply networks below 10 kV (hereinafter referred to as "terminal networks"), the only critical requirement is uninterrupted or uninterrupted power. Despite its long history, the widely used UPS (Uninterruptible Power Supply) system (UPS) utilizes a hot-line, energy-consuming conversion and transmission model (rectifier → inverter → filtering → thyristor). This not only fails to fully address the issue of uninterrupted power supply, but also presents a series of drawbacks and potential risks associated with hot-line operation. The emergence and development of the Intelligent Rapid Emergency Power Supply System (ISPS) has provided a new approach to providing uninterrupted power to critical loads that is energy-efficient, environmentally friendly, safe, and long-lasting. Unlike traditional UPS, the ISPS based on the standard "T / ASC04-2019" (hereinafter referred to as "standard ISPS") adopts an operating mode of direct transmission from the external network power supply (hereinafter referred to as "mains power"). It not only avoids all the disadvantages and hidden dangers of UPS, but also completely solves the problem of not requiring hot online conversion of semiconductor modules while ensuring uninterrupted power supply, thereby improving the safety and reliability of power supply to important loads in an energy-saving and environmentally friendly manner.

[0003] The technical measures used by the standard ISPS to ensure uninterrupted and uninterrupted power supply to critical loads include: utilizing the "serious parameter anomaly" information that appears immediately before a power outage in the power supply network to quickly initiate output-end conversion, thereby ensuring that the power interruption time indicator (T) meets the requirements of relevant design specifications or standards (i.e., T≤10ms). Furthermore, considering that a small number of older critical load equipment are at the end of their lifespan, their functions have severely degraded, their internal electronic device parameters have significantly drifted, and even a 1ms power interruption poses risks, "T / ASC 04-2019" further stipulates that for power outages caused by grid faults (excluding human-caused power outages), ISPS output-end conversion should ensure T<0.01ms. This is intended to mitigate the risk of power interruptions to older, specialized equipment. However, when a short-circuit fault occurs in the high-voltage power supply network and triggers a near-end circuit breaker to trip and protect the power supply, the "serious parameter anomaly" message triggered by the tripping moment requires hundreds of milliseconds to propagate along the lines and transformers to the terminal network, as the circuit breaker and the ~380 / 220V distribution network (hereinafter referred to as the "terminal network") where the ISPS reside are separated by one or more transformers and power lines of different voltage levels. By the time the "serious parameter anomaly" message appears in the terminal network, the supply voltage has already dropped below 85%. For critical loads, the power supply has objectively begun to be interrupted (the voltage no longer meets demand), marking the physical end of a power outage. This leaves very limited time for the ISPS to control output switching, making it impossible to guarantee the output switching performance of T ≤ 10ms, let alone the specified T < 0.01ms. Therefore, for short-circuit faults in the high-voltage power supply network, output switching cannot be initiated only after the "serious parameter anomaly" message appears in the terminal network. Instead, more proactive output switching measures are required. Summary of the Invention

[0004] The purpose of the present invention is to provide an intelligent fast emergency power supply system that monitors high-voltage short-circuit characteristic information using an attribute method, which can make timely judgments on short-circuit faults in the high-voltage power supply network and start ISPS output end conversion in advance to avoid illegal interruption of power supply to important loads due to short-circuit protection of the high-voltage power supply network.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] An intelligent rapid emergency power supply system for monitoring high-voltage short-circuit characteristic information using an attribute method comprises four intelligent modules installed on each of the A-phase, B-phase, and C-phase power lines of the ISPS system's mains direct transmission branch, capturing characteristic information of the high-voltage short-circuit instant according to different attributes of current, voltage, harmonics, and impedance; and initiating ISPS output-end conversion in advance based on the characteristic information; the different attributes include current, voltage, harmonics, and impedance; and the characteristic information refers to current variation characteristic information, voltage variation characteristic information, harmonic mutation characteristic information, and impedance mutation characteristic information released in the A-phase, B-phase, and C-phase power lines at the moment of a short-circuit fault in the high-voltage power supply network.

[0007] In smart grid dispatching, high-voltage short-circuit conditions are judged and emergency response plans are quickly determined based on the combined analysis of the information attributes of each intelligent module. In this application, the individual characteristics (strength, change rate, attributes, etc.) of the information of each intelligent module are mainly used to confirm the physical working conditions (electrical distance, physical location, and short-circuit type, etc.) of the high-voltage short-circuit fault, so as to choose the time to start the output end conversion in advance.

[0008] The intelligent fast emergency power supply system includes: an intelligent module group X1~X12, an intelligent controller IPo, a mains direct transmission branch Dt, an abnormal emergency branch Ae, a composite fast switch Cf, a battery unit IID, and monitoring instruments IA and IA1~IA3.

[0009] During operation, when the mains power is normal, it runs in the mains direct power supply mode, and switches to the abnormal emergency power supply mode the moment the intelligent module group senses the characteristic information; when the duration of the characteristic information reaches the set value, or the power outage precursor information appears, it switches to the battery inverter emergency power supply mode; during the abnormal emergency power supply mode or the battery inverter emergency power supply mode, if the mains power returns to normal, it switches back to the mains direct power supply mode.

[0010] Optionally, the intelligent module group X1 to X12 for monitoring characteristic information refers to an inductive power electronic chip or module or smart meter that is embedded with processing and computing functions and has the function of accepting fixed software editing. It can be installed at any position on the mains direct transmission branch or mains incoming line side in the ISPS system cabinet.

[0011] In this application, the intelligent module group is divided into 3 groups, A, B, and C, with 4 modules in each group. Among them, the intelligent modules X1 to X4 of group A are installed in phase A, the intelligent modules X5 to X8 of group B are installed in phase B, and the intelligent modules X9 to X12 of group C are installed in phase C. The characteristic information targets captured by the 4 intelligent modules installed in each phase are: current variation characteristic information, voltage variation characteristic information, harmonic mutation characteristic information and impedance mutation characteristic information.

[0012] Optionally, the intelligent controller IPo is used to: control the operation of all components, modules and units; monitor the information of all intelligent modules and smart instruments; and control the ISPS output end conversion based on the severe abnormal parameter information from the monitoring instruments IA1 and IA3 or the characteristic information from the intelligent module group X1 to X12.

[0013] The finished product of the intelligent controller IPo is a single chip microcomputer, a microcomputer, an industrial computer, a programmable controller, an intelligent instrument or a control module with embedded computer functions.

[0014] The control signal lines of the intelligent controller IPo connect all instruments, intelligent modules, controlled contact and contactless switches, controlled units and components or modules inside the smart battery unit.

[0015] Optionally, the composite fast circuit breaker Cf comprises a composite switch ICS1 and a composite switch ICS2, wherein composite switch ICS1 comprises a contact switch Q1 and a contactless switch I1 connected in parallel, while composite switch ICS2 comprises a contact switch Q2 and a contactless switch I2 connected in parallel. Contact switches Q1 and Q2 are electromechanical switches, including but not limited to contactors, relays, magnetic saturation relays, or electric load switches, and are used for continuous current carrying. Contactless switches I1 and I2 are dual-control power electronic switches, including but not limited to power MOS, IGBT, IPM, IGCT, IEBT, and gallium nitride or silicon carbide power semiconductor devices, and are used for transient current carrying during power supply mode transitions.

[0016] The input of compound switch ICS1 (i.e., the parallel inputs of contactor switch Q1 and contactless switch I1) is connected to the output of incoming line switch K01. The input of compound switch ICS2 (i.e., the inputs of contactor switch Q2 and contactless switch I2) is connected to the output of filter LC within emergency branch Ae. The output of compound switch ICS1 (i.e., the parallel outputs of contactless switch I1 and contactor switch Q1) and the output of compound switch ICS2 (i.e., the parallel outputs of contactor switch Q2 and contactless switch I2) are connected in parallel to the input of output switch S2.

[0017] The direct AC power transmission branch Dt, consisting solely of a conventional switch S1 and associated conductors, functions as a channel for the normal direct AC power transmission mode. This mode involves the AC power being introduced via the incoming switch K01 and then supplied to the load via the conventional switch S1, the combined switch ICS1 within the combined fast circuit breaker Cf, and the output switch S2. The input of the direct AC power transmission branch Dt (i.e., the input of the conventional switch S1) is directly connected to the output of the incoming power switch K01, while the output of the direct AC power transmission branch Dt (i.e., the output of the conventional switch S1) is directly connected to the input of the combined switch ICS1 within the combined fast circuit breaker Cf.

[0018] The emergency branch Ae, consisting of a surge-resistant rectifier RU, an enhanced inverter ELn, and a filter LC connected in series, serves as a channel for the emergency power supply mode. This mode involves the mains electricity being introduced through the incoming switch K01 and then flowing through the surge-resistant rectifier RU, enhanced inverter ELn, and filter LC within the emergency branch Ae, and then through the composite switch ICS1 and output switch S2 within the composite fast-acting circuit breaker Cf to supply power to the load. The input of the emergency branch Ae (i.e., the surge-resistant rectifier RU) is connected to the output of the incoming switch K01, while the output of the emergency branch Ae (i.e., the filter LC) is connected to the input of the composite switch ICS2 within the composite fast-acting circuit breaker Cf.

[0019] Optionally, the smart battery unit refers to a multifunctional energy storage unit that integrates intelligent charging and linkage, battery pack monitoring and online protection, negative pulse maintenance and signal linkage; the smart battery unit exists as an energy storage unit; under the preset conditions of meeting functional requirements, the smart battery unit is replaced by a lead-acid battery pack or a lithium-ion battery pack.

[0020] Optionally, the monitoring scope of monitoring instrument IA, monitoring instrument IA1, monitoring instrument IA2, and monitoring instrument IA3 includes: current, voltage, active power, reactive power, power factor, battery voltage and charging current parameters, emergency inverter output parameters, and serious abnormal parameter information that characterizes the precursor of power outage.

[0021] The monitoring instruments IA, IA1, IA2, and IA3 are DDC-III or DDC-IV automated instruments or other modern intelligent instruments. The monitoring instrument IA is used to monitor normal operating parameters such as current, voltage, active power, reactive power, power factor, and battery voltage. Its primary and secondary wiring methods are the same as those used in traditional UPSs and standard ISPSs. The monitoring instrument IA2 is used to monitor inverter output parameters. Its signal sampling point is located at the output of inverter ELn. The primary and secondary wiring methods are based on the product's technical specifications. The monitoring instrument IA1 is used to capture severe parameter anomalies before a fault power outage. Its signal sampling point is located anywhere on the power supply line or on the mains direct transmission branch. The monitoring instrument IA3 is used to capture severe parameter anomalies before a fault power outage. Its signal sampling point is located anywhere between the composite fast-acting circuit breaker Cf and the output switch S2. The display panels of the aforementioned monitoring instruments IA and IA2 are located on the ISPS cabinet, while the primary monitoring components are located within the ISPS cabinet. Monitoring instruments IA1 and IA3 contain only the primary monitoring components within the cabinet and do not require display panels. The primary and secondary wiring connections for all monitoring instruments follow the standard connections commonly used in various engineering applications, or can be connected according to the product manual.

[0022] The solution provided by the present invention can achieve the following technical effects while maintaining all the functions of the standard ISPS:

[0023] Technical Effect 1: Even if a remote high-voltage circuit breaker trips and powers off due to a high-voltage short circuit, the ISPS output conversion index in the terminal system can be guaranteed to meet the T<0.01ms requirement and meet the actual needs of old facilities, solving special problems that standard ISPS cannot solve.

[0024] Technical Effect 2: Based on the analysis of characteristic information with different attributes and characteristics in the A, B, and C phase circuits, the actual situation of the short-circuit fault in the upper-level high-voltage power supply network (for example, what type of short circuit is it? The physical location of the short circuit, etc.) can be determined. This can not only assist in the rapid dispatching and decision-making of the smart grid, but also quickly provide data information for smart grid management, which is conducive to the advancement and improvement of the smart grid management level.

[0025] Technical effect 3: When encountering some special factors that cause the mains power to have a continuous transient abnormality (fluctuation or transient), the ISPS will automatically maintain the abnormal emergency output state. When the transient abnormal phenomenon ends, it will seamlessly return to the mains direct power supply mode. If the transient phenomenon continues and the mains power is cut off, it will seamlessly switch to the battery inverter emergency power supply state, thereby ensuring that important loads are always in a safe and stable power supply state.

[0026] In practice, high-voltage power supply networks are divided into near-end, mid-end, and far-end networks. The near-end network refers to the 10kV transmission trunk lines and 10kV distribution busbars close to the terminal network; the mid-end network refers to the 10kV lines and 33kV or 66kV (including 50kV) power supply networks farther from the terminal network; and the far-end network refers to power supply networks with voltage levels of 110kV or 220kV and above. Clearly, the electrical distances between the near-end, mid-end, and far-end networks differ significantly, as do the characteristics of short-circuit faults. Therefore, comprehensive analysis of the characteristic information within each monitoring module group can determine the type and location of high-voltage short circuits. This can be used to assist in the smart grid's emergency response plan, thereby improving the smart grid's capabilities for rapid monitoring, rapid judgment, and rapid response, thereby shortening the duration of interruptions to downstream high-voltage power supply caused by short-circuit tripping in the high-voltage power supply network. However, this application does not focus on the detailed information of the high-voltage short-circuit fault, but only focuses on confirming the fact of the high-voltage short-circuit through the common direction of more than two characteristic information. Therefore, only one intelligent module of current, voltage, harmonics, and impedance attributes is installed in each phase A, B, and C respectively. According to the emergence of more than two characteristic information, the fact that a short circuit has occurred in the high-voltage network is determined, and the ISPS output end conversion is started in advance based on this fact to ensure that the output end conversion index T is less than 0.01ms in the case of a short circuit in the high-voltage power supply network, thereby constituting the "intelligent fast emergency power supply system (ISPS) that monitors high-voltage short-circuit characteristic information by attribute method" described in this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 Schematic diagram of an intelligent fast emergency power supply system that monitors high-voltage short-circuit characteristic information using the attribute method.

[0029] Figure 2 This is a schematic diagram of the principle of the standard ISPS drawn based on the standard "T / ASC 04-2019".

[0030] Figure 3 Schematic diagram of short circuit faults at different electrical locations in the high-voltage power supply network. DETAILED DESCRIPTION

[0031] Practice has demonstrated that, at the moment of occurrence of any of the four types of short-circuit faults in high-voltage power supply networks, operating parameters will experience sudden changes and mutations due to the strong short-circuit power and electromagnetic field. Physically, this information is transmitted through the lines and transformers, unconstrained by the transient process, to distant locations, including the terminal network. This information can be captured and processed by dedicated monitoring devices installed on phases A, B, and C. To date, the signal source attributes of this information have been identified as primarily voltage, current, harmonics, and impedance, with over a dozen characteristic features being monitored. While each of these features possesses distinct characteristics, they all share the common characteristic of sudden onset. These physical characteristics indicate the occurrence of a short-circuit fault, and are therefore defined as "signature information" of a short-circuit fault. In the event of a high-voltage power supply network short-circuit, this characteristic information reaches the terminal network hundreds of milliseconds before any "serious parameter anomaly" information. Therefore, by utilizing this characteristic information to initiate conversion at the standard ISPS output, conversion can be completed instantly, ensuring a conversion time of less than 0.01ms, even before the "serious parameter anomaly" information appears in the terminal network.

[0032] like" Figure 1 As shown in FIG, after the mains power is introduced through the incoming switch K01, it is divided into two branches: one is the mains direct transmission branch Dt, which is connected by the input of the ordinary switch S1 to the output of K01, and the output of the ordinary switch S1 is connected to the input of the composite switch ICS1 in the composite fast circuit changer Af (that is, the parallel input of the contact switch Q1 and the contactless switch I1); the other is the abnormal emergency branch Ae, which is connected by the input of the impact-resistant rectifier RU in the abnormal emergency branch Ae to the input of K01, and the output of the impact-resistant rectifier RU is connected to the battery discharge interface and the enhanced inverter E. The input end of Lm and the output end of the enhanced inverter ELm are connected to the input end of the filter LC, and the output end of the filter LC is connected to the input end of the composite switch ICS2 in the composite fast circuit changer Cf (that is, the parallel input end of the contactless switch I2 and the contact switch Q2); the output end of the composite switch ICS1 (that is, the parallel output end of the contactless switch I1 and the contact switch Q1) and the output end of the composite switch ICS2 (that is, the parallel output end of the contactless switch I2 and the contact switch Q2) are connected in parallel and then connected to the input end of the output switch S2, and the output end of S2 is connected to the load distribution cabinet.

[0033] An inductive intelligent module group X1 to X12 is set at any position along the mains direct transmission branch power line or the power line on the power supply incoming line side, among which the intelligent module X1, the intelligent module X2, the intelligent module X3, and the intelligent module X4 are set at phase A, and are respectively used to monitor the current variation characteristic information, voltage variation characteristic information, harmonic mutation characteristic information, and impedance mutation characteristic information in the phase A power line; the intelligent module X5, the intelligent module X6, the intelligent module X7, and the intelligent module X8 are set at phase B, and are respectively used to monitor the current variation characteristic information, voltage variation characteristic information, harmonic mutation characteristic information, and impedance mutation characteristic information in the phase B power line; the intelligent module X9, the intelligent module X10, the intelligent module X11, and the intelligent module X12 are set at phase C, and are respectively used to monitor the current variation characteristic information, voltage variation characteristic information, harmonic mutation characteristic information, and impedance mutation characteristic information in the phase C power line.

[0034] The integrated monitoring instrument IA is a multifunctional intelligent information instrument used to read and display normal parameters of the ISPS system, such as operating current, voltage, active power, reactive power, power factor, charging current, and DC voltage. Its display panel is set on the cabinet surface; the monitoring instrument IA2 is used to monitor parameters such as inverter current, voltage, and frequency. Its signal sampling point is taken at any position between the filter LC and the composite switch ICS1, and its display panel is set on the cabinet surface; the monitoring instrument IA1 may not be equipped with a cabinet display panel, and its signal sampling point is taken at any position on the AC direct transmission channel to capture information on "serious parameter abnormalities" before power outages; the monitoring instrument IA3 may not be equipped with a cabinet display panel, and its signal sampling point is taken at any position between the composite fast circuit changer Af and the output switch S2, or at any position between S2 and the load distribution cabinet, to capture information on "serious parameter abnormalities" before power outages for a secondary time. Monitoring instrument IA, monitoring instrument IA1, monitoring instrument IA2, and monitoring instrument IA3 can all be DDC-Ⅲ or DDC-Ⅳ type automation instruments or other types of modern intelligent instruments. The primary and secondary wiring adopts the usual wiring method in the industry or is connected according to the product manual.

[0035] The control and signal lines of the intelligent controller IPo connect the intelligent module group X1~X12; connect the monitoring instruments IA and IA1~IA3; connect the control poles of the contactless switch I1 and the contactless switch I2 in the composite fast circuit breaker Cf; connect the control coils of the contact switch Q1 and the contactless switch Q2 in the composite fast circuit breaker Cf; connect the impact-resistant rectifier RU, the enhanced inverter ELn, the smart battery unit and the contact and contactless linkage switches inside them.

[0036] Special note: Practice has shown that among the four types of short-circuit faults in the high-voltage power supply network, although the "characteristic information" released by each type of short-circuit fault mainly includes four major types: current variation, voltage variation, impedance mutation, and harmonic mutation, the signal characteristics of any type of short-circuit in the A, B, and C phase power lines are not exactly the same, and even if the same type of short-circuit appears in the same phase power line, its individual characteristics are also different. Therefore, the "characteristic information" that suddenly appears when a short-circuit fault in the high-voltage power supply network is a family of information. If all individual information is monitored, a family of monitoring modules is also required. Based on the needs of supporting smart grids, the scheme for monitoring the characteristic information of short-circuit faults in the high-voltage power supply network can adopt at least the "centralized method", "group method", "attribute method" and "symbol method" schemes. The "intelligent rapid emergency power supply system (ISPS) that monitors high-voltage short-circuit characteristic information by attribute method" described in this application belongs to the attribute method scheme, that is, only one monitoring module representing current, voltage, harmonics, and impedance attributes is set on each phase power line to verify the situation of the high-voltage network short circuit. That is, for the characteristic information within the phase A power line, intelligent module X1 is used to monitor current variation, intelligent module X2 to monitor voltage variation, intelligent module X3 to monitor harmonic mutations, and intelligent module X4 to monitor impedance mutations. For the characteristic information within the phase B power line, intelligent module X5 is used to monitor current variation, intelligent module X6 to monitor voltage variation, intelligent module X7 to monitor harmonic mutations, and intelligent module X8 to monitor impedance mutations. For the characteristic information within the phase C power line, intelligent module X9 is used to monitor current variation, intelligent module X10 to monitor voltage variation, intelligent module X11 to monitor harmonic mutations, and intelligent module X12 to monitor impedance mutations. Because the emergent characteristic information of each individual module represents a short circuit in the high-voltage power supply network, the comparison and analysis of the characteristic information of multiple modules can determine the short circuit fault situation, providing a basis for smart grid scheduling and rapid response. In this application, only the comparison and confirmation of information from 2 to 3 modules is needed to initiate the standard ISPS output terminal rapid conversion procedure.

[0037] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the systems disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0038] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An intelligent fast emergency power supply system that monitors high-voltage short-circuit characteristic information using an attribute method, characterized in that: Four intelligent modules are installed on each of the Phase A, Phase B, and Phase C power lines of the ISPS system's mains direct transmission branch. These modules monitor the characteristic information of current variation, voltage variation, harmonic mutation, and impedance mutation released within the Phase A, Phase B, and Phase C power lines at the moment a short circuit occurs in the high-voltage power supply network. This characteristic information helps the dispatching department assess fault conditions in the upper-level power grid and handle emergencies in the local power grid during smart grid dispatch. Specifically, this characteristic information is used to initiate ISPS output conversion in advance, resolving the problem that the standard ISPS cannot guarantee the indicator T < 0.01ms during high-voltage short circuits. The intelligent fast emergency power supply system includes: an intelligent module group X1~X12 and associated intelligent controller IPo, a mains direct transmission branch Dt, an abnormal emergency branch Ae, and a composite fast switch Cf. The intelligent fast emergency power supply system also includes a smart battery unit IIU, monitoring instruments IA and IA1~IA3; the intelligent fast emergency power supply system operates in a mains direct transmission power supply mode when the mains power is normal; operates in an abnormal emergency power supply mode when the characteristic information of a high-voltage short circuit appears; operates in a battery inverter emergency power supply mode when the duration of the characteristic information reaches a set value or a power outage precursor information appears in the network; during the abnormal emergency power supply mode or the battery inverter emergency power supply mode, if the mains power returns to normal, the system returns to the mains direct transmission power supply mode.

2. The intelligent fast emergency power supply system for monitoring high-voltage short-circuit characteristic information by attribute method according to claim 1 is characterized in that: The intelligent module groups X1 to X12 for monitoring the short-circuit characteristic information of the high-voltage network are respectively installed in phases A, B, and C, with one group per phase and four per group, and are respectively used to monitor current variation characteristic information, voltage variation characteristic information, harmonic mutation characteristic information, and impedance mutation characteristic information. The installation position of the intelligent module group is any position on the mains direct transmission branch or mains incoming line side in the ISPS system cabinet. They are all inductive power electronic chips or modules or monitoring instruments with embedded processing and calculation functions and the ability to accept fixed software editing.

3. The intelligent fast emergency power supply system for monitoring high-voltage short-circuit characteristic information by attribute method according to claim 1 is characterized in that: The intelligent controller IPo is used to: control the operation of all components, modules and units; monitor the information of all intelligent modules and intelligent instruments; control the ISPS output terminal conversion based on the serious abnormality information of parameters from the monitoring instruments IA1 and IA3 or the characteristic information from the intelligent module group X1 to X12; The finished product of the intelligent controller IPo is a single-chip microcomputer, a microcomputer, an industrial computer, a programmable controller, an intelligent instrument or a control module with embedded computer functions; the control signal line of the intelligent controller IPo connects all instruments, intelligent modules, controlled contact and contactless switches, controlled units and components or modules inside the smart battery unit.

4. The intelligent fast emergency power supply system for monitoring high-voltage short-circuit characteristic information using the attribute method according to claim 1 or 2, characterized in that: The abnormal emergency branch Ae supplies power to the load through the anti-shock rectifier RU, enhanced inverter ELn and filter LC connected in series at the moment when the mains parameters are illegal; during the mains interruption, the battery pack inverter supplies power to the load.

5. The intelligent fast emergency power supply system for monitoring high-voltage short-circuit characteristic information using the attribute method according to claim 1 or 2, characterized in that: The composite fast circuit switch Cf is composed of a composite switch ICS1 and a composite switch CS2, wherein the composite switch ICS1 is composed of a contact switch Q1 and a contactless switch I1 connected in parallel, and the composite switch ICS2 is composed of a contact switch Q2 and a contactless switch I2 connected in parallel.

Images