CN112713646B - An emergency power supply non-stop access system and access control method thereof - Google Patents
An emergency power supply non-stop access system and access control method thereof Download PDFInfo
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- CN112713646B CN112713646B CN202011548428.1A CN202011548428A CN112713646B CN 112713646 B CN112713646 B CN 112713646B CN 202011548428 A CN202011548428 A CN 202011548428A CN 112713646 B CN112713646 B CN 112713646B
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- power supply
- control system
- mobile power
- circuit breaker
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention discloses an emergency power supply uninterrupted access system, which comprises an uninterrupted coordinated control system arranged in a power distribution station, an emergency power supply interface cabinet and a mobile power supply vehicle, wherein the emergency power supply interface cabinet and the mobile power supply vehicle are arranged outside the power distribution station, the uninterrupted coordinated control system comprises a transformer and a circuit breaker II which are connected between a commercial power network and a load, a commercial power detection transformer component is sleeved on a cable between the transformer and the circuit breaker II, the commercial power network is connected to the emergency power supply interface cabinet after passing through the transformer and the circuit breaker II, a mobile power detection transformer component is sleeved on a cable between the circuit breaker I and the emergency power supply interface cabinet, a power interface of the mobile power supply vehicle is connected to the emergency power supply interface cabinet through the cable, the commercial power detection transformer component and the mobile power detection transformer component are both connected to a signal access end of a control system, and a control end of the control system is connected to the circuit breaker I and the circuit breaker II. The invention discloses an uninterrupted access system for an emergency power supply, which can realize uninterrupted access to a power supply network through a mobile power supply vehicle.
Description
Technical Field
The present invention relates to an access system and an access control method thereof, and more particularly, to a system and an access switching control method capable of performing uninterrupted access when an emergency power supply is accessed and performing uninterrupted seamless switching when the emergency power supply is used.
Background
Currently, when a power supply network has to be powered off in the face of power overhaul and the like, a mobile power supply vehicle is used for temporary power supply so as to ensure continuous power supply of the power supply network.
However, when the conventional mobile power supply vehicle is connected, the original commercial power supply network is required to be disconnected firstly, then the mobile power supply vehicle is connected to realize power supply, in this way, the power utilization persistence of a terminal user is affected, the connection efficiency is low, a certain operation hidden danger (higher operation requirement on operators) exists, the mobile power supply vehicle is required to be driven to the periphery of a power distribution room to perform operation, the power access of the mobile power supply vehicle cannot be realized rapidly under the condition that the surrounding roads are narrow or vehicles and stacks are blocked, finally, after the maintenance is completed, the access of the mobile power supply vehicle is disconnected, the commercial power supply network is connected again after the power is cut off, and the power utilization experience of the user is seriously affected due to repeated power failure.
In addition, the conventional mobile power supply vehicle comprises a mobile energy storage vehicle and a mobile diesel power generation vehicle, when a diesel generator of the mobile diesel power generation vehicle is used for generating power on site to temporarily supply power, but due to the limitation of a vehicle-mounted space, the diesel generator cannot operate to generate power with the highest power, so that the power consumption of a user cannot be guaranteed, and the diesel generator is output with constant power, so that a voltage fluctuation exists at a user load end, irreversible damage can be caused to precision equipment, and meanwhile, larger air pollution and noise interference can be caused when the diesel generator operates.
In view of the foregoing, there is a need for an emergency power supply uninterrupted power access system and an access control method thereof that can solve the foregoing problems.
Disclosure of Invention
The invention aims to overcome the defects and provide an uninterrupted access system for an emergency power supply and an access control method thereof, which can realize uninterrupted access to a power supply network through a mobile power supply vehicle.
The purpose of the invention is realized in the following way:
The system comprises an uninterrupted power coordination control system arranged in a power distribution station, an emergency power interface cabinet and a mobile power supply vehicle, wherein the emergency power interface cabinet and the mobile power supply vehicle are arranged outside the power distribution station, the uninterrupted power coordination control system comprises a transformer and a circuit breaker II which are connected between a commercial power network and a load, a commercial power detection transformer component is sleeved on a cable between the transformer and the circuit breaker II, the commercial power network is connected to the emergency power interface cabinet after passing through the transformer and the circuit breaker II, a mobile power detection transformer component is sleeved on a cable between the circuit breaker I and the emergency power interface cabinet, a power interface of the mobile power supply vehicle is connected to the emergency power interface cabinet through a cable, the commercial power detection transformer component and the mobile power detection transformer component are both connected to a signal access end of the control system, and a control end of the control system is connected to the circuit breaker I and the circuit breaker II.
The invention relates to an uninterrupted access system for an emergency power supply, wherein a main switch of an emergency power supply interface cabinet connected to a first circuit breaker is a frame circuit breaker, the frame circuit breaker is provided with two paths of outgoing lines, and one path of outgoing lines is connected to a mobile power supply vehicle through a quick plug interface or a copper bar connection structure.
The invention relates to an uninterrupted access system for an emergency power supply, wherein a bypass output loop is provided with three interfaces, one is provided with a molded case circuit breaker, the other is a common socket, and the other is a three-pole micro-breaking type.
The invention relates to an uninterrupted access system of an emergency power supply, wherein the main switch is a three-pole circuit breaker.
The invention discloses an uninterrupted access system for an emergency power supply, wherein a direct-current bus copper bar is erected in a carriage of a mobile power supply vehicle, a storage battery installed in the mobile power supply vehicle is respectively hung on the direct-current bus copper bar after passing through a DC/DC conversion module, the direct-current bus copper bar is accessed into a mobile energy storage control system, and an alternating-current port of the mobile energy storage control system is connected to a quick plug interface through a power line.
The invention discloses an uninterrupted access system for an emergency power supply, wherein a wireless communication module is arranged in a carriage of a mobile power supply vehicle, and a mobile energy storage control system is connected with a background server through the wireless communication module.
The invention relates to an uninterrupted access system for an emergency power supply, which is characterized in that the top of a carriage of a mobile power supply vehicle is provided with a solar power generation assembly and a wind generating set, wherein the power output ends of the solar power generation assembly and the wind generating set are respectively connected to a direct current bus copper bar in a hanging mode through a DC/DC conversion module;
an access control method of an emergency power supply uninterrupted access system comprises the steps that a commercial power network supplies power to a load after passing through a transformer and a circuit breaker II, and a mobile power supply detection transformer component monitors whether a mobile power supply vehicle is accessed in real time;
When the mobile power supply vehicle is accessed, the mobile power supply detection transformer component transmits detected voltage, frequency and amplitude signals to the control system in real time, meanwhile, the commercial power detection transformer component also acquires and transmits the voltage, frequency and amplitude signals on a commercial power network detected in real time to the control system, the control system compares whether the voltage phases, frequency and amplitude of the commercial power network and the mobile power supply vehicle are synchronous, when the voltage phases, frequency and amplitude signals are not synchronous, the control system transmits the control signals to the mobile energy storage control system to modulate the output of the mobile power supply vehicle, the control system circulates until the voltage phases, frequency and amplitude signals of the commercial power network and the mobile power supply vehicle are synchronous and consistent, at the moment, the control system controls the first circuit breaker to be closed, and keeps the second circuit breaker closed, so that cascading with the mobile power supply vehicle is realized;
Meanwhile, after the mobile power supply vehicle is cascaded with the emergency power supply interface cabinet, in the process of monitoring the voltage on the commercial power network in real time, the commercial power detection transformer component transmits three-phase voltages U A,UB and U C on the commercial power network to the control system in real time, the control system calculates three-phase voltages U A,UB and U C acquired by the commercial power detection transformer component, and converts the three-phase voltages into an alpha-beta coordinate system formed by U α and U β, and the conversion formula is as follows:
Let the judgment quantity be gamma, the judgment result is gamma,
When the value of gamma is lower than a preset value, judging that the commercial power network is in a power failure state, at the moment, the control system cuts off the second circuit breaker, keeps the first circuit breaker closed, and then the storage battery in the mobile power supply vehicle starts to supply power to the load.
Compared with the prior art, the invention has the beneficial effects that:
The invention realizes the quick uninterrupted access of the mobile power supply vehicle and can automatically identify and switch the power supply mode through the uninterrupted coordinated control system arranged in the power distribution station, ensures the continuous uninterrupted power supply of the load, simultaneously, the whole operation is safe, quick and convenient by arranging the emergency power supply interface cabinet and completing the power connection of the mobile power supply vehicle and the emergency power supply interface cabinet through the cable with the quick connectors at the two ends, and the mobile power supply vehicle can be conveniently connected with the quick plug interface in the emergency power supply interface cabinet through the cable pulling mode when the mobile power supply vehicle cannot approach the power distribution station, thereby ensuring the wide applicability of the mobile power supply vehicle, and finally, the accuracy of switching is ensured through the conversion of an alpha-beta coordinate system when the switching is controlled, avoiding the possibility of misoperation, realizing the seamless switching in the true sense by matching the automatic identification and the switching of the battery repair power supply, and avoiding the adverse effects of fluctuation and the like on the power consumption of users.
Drawings
FIG. 1 is a system block diagram of an uninterruptible power supply access system of the present invention.
Fig. 2 is a schematic diagram of an α - β coordinate system.
Wherein:
A transformer 1;
The system comprises a mains supply detection transformer assembly 101, a mobile power supply detection transformer assembly 102, a first circuit breaker 103 and a second circuit breaker 104.
Detailed Description
Referring to fig. 1 and 2, the invention relates to an emergency power supply uninterrupted access system, which comprises an uninterrupted coordinated control system arranged in a power distribution station, an emergency power supply interface cabinet arranged outside the power distribution station and a mobile power supply vehicle;
The uninterrupted coordinated control system comprises a transformer 1 and a breaker II 104 which are connected between a commercial power network and a load, wherein a commercial power detection transformer component 101 is sleeved on a cable between the transformer 1 and the breaker II 104, the commercial power is connected to an emergency power interface cabinet after passing through the transformer 1 and the breaker II 104 and then passing through a breaker I103, a mobile power detection transformer component 102 is sleeved on a cable between the breaker I103 and the emergency power interface cabinet, a power interface of a mobile power supply vehicle is connected to the emergency power interface cabinet through a cable, the commercial power detection transformer component 101 and the mobile power detection transformer component 102 are both connected to a signal access end of a control system, and a control end of the control system is connected to the breaker I103 and the breaker II 104;
The utility power detection transformer component 101 and the mobile power supply detection transformer component 102 are used for detecting current and voltage on a cable, wherein the voltage is used for performing access control switching, and the current is used for calculating electric parameters such as power, power factors, electric energy quality and the like.
Furthermore, the main switch of the emergency power interface cabinet connected to the first circuit breaker 103 is a frame circuit breaker, the frame circuit breaker is provided with two paths of outgoing lines, one path of outgoing lines is connected to the mobile power supply vehicle through a quick plug interface or a copper bar connecting structure (the quick plug interface can realize quick plug, the copper bar can be connected with cable copper noses with different sizes), and the other path of outgoing lines is a bypass output loop, so that the mobile power supply vehicle can be used for connecting temporary loads;
Preferably, the bypass output loop is provided with three interfaces, one is provided with a molded case circuit breaker, one is provided with three miniature breaks, and the other is a common socket;
preferably, the main switch is a three-pole breaker, has reverse power transmission capability, has high reliable breaking capability, can be remotely controlled to break, is provided with auxiliary contacts, can display the switching value state, and can break current in emergency. Meanwhile, the phase sequence detection function is provided, the phase sequence protection function is provided, and the alarm reminding or direct tripping protection can be realized.
Further, a direct current bus copper bar is erected in a carriage of the mobile power supply vehicle, a storage battery installed in the mobile power supply vehicle is respectively connected to the direct current bus copper bar in a hanging mode after passing through a DC/DC conversion module, the direct current bus copper bar is connected to a mobile energy storage control system, and an alternating current port of the mobile energy storage control system is connected to a quick plug interface through a power line.
Preferably, a wireless communication module is arranged in a carriage of the mobile power supply vehicle, and the mobile energy storage control system is connected with a background server through the wireless communication module;
Preferably, a solar power generation assembly and a wind generating set are arranged at the top of a carriage of the mobile power supply vehicle, and the power output ends of the solar power generation assembly and the wind generating set are respectively connected to a direct current bus copper bar in a hanging mode after passing through a DC/DC conversion module;
Based on the access control method of the emergency power supply uninterrupted access system, the commercial power supply supplies power to the load after passing through the transformer 1 and the breaker II 104, and the mobile power supply detection transformer component 102 monitors whether the mobile power supply vehicle is accessed in real time;
When a mobile power supply vehicle is accessed, the mobile power supply detection transformer component 102 transmits detected voltage, frequency and amplitude signals to the control system in real time, meanwhile, the commercial power detection transformer component 101 also acquires and transmits the voltage, frequency and amplitude signals on a commercial power supply detected in real time to the control system, the control system compares whether the voltage phases, frequency and amplitude of the commercial power supply and the mobile power supply vehicle are synchronous or not, when the voltage phases, frequency and amplitude signals are not synchronous, the control system transmits the control signals to the mobile energy storage control system to modulate the output of the mobile power supply vehicle, the control system circulates until the voltage phases, frequency and amplitude signals of the commercial power supply and the mobile power supply vehicle are synchronous and consistent, at the moment, the control system controls the first circuit breaker 103 to be closed, and keeps the second circuit breaker 104 to be closed, so that cascading with the mobile power supply vehicle is realized;
Meanwhile, after the mobile power supply vehicle is cascaded with the emergency power supply interface cabinet, in the process of monitoring the voltage on the commercial power network in real time, the commercial power detection transformer component 101 actually transmits three-phase voltages U A,UB and U C on the commercial power network to the control system, the control system calculates three-phase voltages U A,UB and U C acquired by the commercial power detection transformer component 101, and converts the three-phase voltages into an alpha-beta coordinate system formed by U α and U β, and the conversion formula is as follows:
Let the judgment quantity be gamma, the judgment result is gamma,
When the value of gamma is lower than a preset value, judging that the commercial power network is in a power failure state, at the moment, the control system cuts off the second circuit breaker 104, keeps the first circuit breaker 103 closed, and then starts to supply power to a load by a storage battery in the mobile power supply vehicle;
The preset value is a fixed quantity determined by the voltage of the power grid and the quality of the power grid;
the gamma is used as the discrimination, rather than single-phase or multi-phase voltage is used as the discrimination, so that the requirement of stability is met, misjudgment caused by disturbance of a power grid is avoided, after the alpha-beta coordinate conversion is adopted, the gamma is only reflected on the value of the gamma when actual power failure occurs, the misjudgment is avoided, the stability of a system is improved, the whole discrimination process is automatically judged by a program, manual participation is not needed, and seamless switching is truly realized;
In addition, it should be noted that the above specific embodiment is only one optimization scheme of the present patent, and any modification or improvement made by those skilled in the art according to the above concepts falls within the protection scope of the present patent.
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| CN202011548428.1A CN112713646B (en) | 2020-12-24 | 2020-12-24 | An emergency power supply non-stop access system and access control method thereof |
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| CN202011548428.1A CN112713646B (en) | 2020-12-24 | 2020-12-24 | An emergency power supply non-stop access system and access control method thereof |
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| CN112713646B true CN112713646B (en) | 2025-01-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114123454A (en) * | 2021-11-09 | 2022-03-01 | 深圳带电科技发展有限公司 | ATS cabinet with circuit breaking protection and plug pulling |
| CN114629226A (en) * | 2021-11-12 | 2022-06-14 | 国网浙江省电力有限公司平湖市供电公司 | Automatic power grid access type power generation vehicle capable of achieving switching without power outage |
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| CN106953377A (en) * | 2017-02-27 | 2017-07-14 | 国网福建省电力有限公司 | Suitable for the mobile energy storage for power supply system control method of multiple access scene |
| CN111478370A (en) * | 2020-04-15 | 2020-07-31 | 贵州电网有限责任公司 | Multi-parallel-machine grid-connected method and system based on non-stop of low-voltage power supply vehicle |
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| JPH06153422A (en) * | 1992-10-30 | 1994-05-31 | Meidensha Corp | Mobile generator for uninterruptive changeover |
| JPH06245410A (en) * | 1993-02-18 | 1994-09-02 | Meidensha Corp | Mobile generation set to be switched without service interruption |
| JPH07231579A (en) * | 1994-02-15 | 1995-08-29 | Meidensha Corp | Mobile power supply |
| CN107887920A (en) * | 2016-09-29 | 2018-04-06 | 易事特集团股份有限公司 | UPS |
| CN106998099B (en) * | 2017-02-27 | 2020-03-27 | 国网福建省电力有限公司 | Mobile energy storage power supply system access and exit control method under uninterrupted power supply condition |
| CN110071572B (en) * | 2019-04-25 | 2021-03-09 | 合肥堃能电气科技有限公司 | Bidirectional charging and discharging integrated emergency power supply device and control method thereof |
| CN110571915A (en) * | 2019-09-19 | 2019-12-13 | 浙江工业大学 | An intelligent energy storage power supply vehicle uninterruptible power supply system device and control method thereof |
| CN211239348U (en) * | 2019-12-20 | 2020-08-11 | 徐州海伦哲特种车辆有限公司 | Power supply vehicle parallel operation and repeated parallel operation system |
| CN110994693A (en) * | 2019-12-30 | 2020-04-10 | 龙岩市海德馨汽车有限公司 | A non-power-off parallel-machine-connected system and grid-connected method for a medium-voltage power supply vehicle |
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| CN106953377A (en) * | 2017-02-27 | 2017-07-14 | 国网福建省电力有限公司 | Suitable for the mobile energy storage for power supply system control method of multiple access scene |
| CN111478370A (en) * | 2020-04-15 | 2020-07-31 | 贵州电网有限责任公司 | Multi-parallel-machine grid-connected method and system based on non-stop of low-voltage power supply vehicle |
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