CN210867194U

CN210867194U - Communication signal intelligence broad width steady voltage UPS equipment

Info

Publication number: CN210867194U
Application number: CN201921705298.0U
Authority: CN
Inventors: 黄力
Original assignee: Sichuan Youliyuan Electric Technology Co ltd
Current assignee: Sichuan Youliyuan Electric Technology Co ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-06-26
Anticipated expiration: 2029-10-12

Abstract

The utility model relates to a communication signal intelligence broad width steady voltage UPS equipment, including multichannel input power processing module, PWM rectifier module, contravariant module and distribution output module. The multi-path input power supply processing module is connected with a plurality of paths of alternating current power supplies with different systems, and the filtering lightning protection processing is carried out on the power supplies which are input; then, the PWM rectification module rectifies the processed multiple paths of alternating current power supplies with different systems to form multiple paths of direct current power supplies, and the multiple paths of direct current power supplies are parallelly connected to form a direct current bus power supply to be sent to the inversion module; the inversion module inverts the sent direct-current bus power into alternating-current power with different systems through an SPWM technology and then transmits the alternating-current power to the distribution output module through an output isolation transformer; and different loads are supplied with power through the intelligent power supply screen of the power distribution output module.

Description

Communication signal intelligence broad width steady voltage UPS equipment

Technical Field

The utility model belongs to the communication equipment power supply field particularly, relates to a communication signal intelligence broad width steady voltage UPS equipment.

Background

The power system is an organic whole from power generation, power transmission, power transformation and power distribution to power utilization, the power source of the power system can be traditional energy sources such as water energy and heat energy, and can also be new energy sources such as solar energy, wind energy and nuclear energy, and the railway power supply system is a subsystem with special load characteristics in the power system. The railway power supply system can be divided into two parts: electric power supply and traction power supply. The electric power supply system provides reliable electric power guarantee for services such as dispatching command, communication signals, passenger service and the like, and the traction power supply system provides electric energy for electric locomotives (motor train units) of the electrified railways.

For a power supply system: the railway power supply line is generally composed of a primary load power through line and a comprehensive power through line which are arranged along the whole railway. The voltage class of the power through line is usually 10kV, the power supply distance is 30-50km, and the power supply distance exceeds 100km under special conditions such as the adoption of 35kV voltage class of a Tibet railway. Communication, signal, comprehensive regulation systems and the like related to the travelling crane along the line are mainly supplied by a first-level load power through line, and comprehensive power through lines are supplied by spare power. Other electric loads and power supplies for various traction substations are supplied with power through comprehensive power through wires, and 10kV box-type substations are arranged at various power points in the interval. Two paths of mutually independent incoming line power supplies of the power transformation and distribution station are provided by a public power grid, and incoming line voltage grades are 10KV, 35kV, 110kV, 220kV and the like. The electric loads are classified into two types, station loads and section loads. The station loads mainly include communication, signals, disaster prevention and alarm, automatic ticket checking, customer service, electric power monitoring, fire-fighting systems, various water pumps, various ventilators, air conditioners, escalators, elevators, electric heating equipment, various production and living lighting and station area lighting loads. The section load mainly comprises communication, a signal relay station, an optical fiber repeater, a power supply operated by a traction substation, tunnel lighting and monitoring equipment and the like. The load is divided into three load grades according to the importance degree, and the most important first-grade load comprises the following steps: communication, signals, disaster prevention and alarm, automatic ticket inspection, customer service, power monitoring, fire-fighting systems, emergency lighting, platform lighting, lighting of underground exit halls, lighting of main control rooms and the like.

For a traction power supply system: the traction transformation has the function of converting 110KV or 220KV three-phase alternating current introduced by a power system into 27.5KV single-phase alternating current, and the alternating current is transmitted to a contact net along a circuit through a feeder line to supply power to an electric locomotive. And a few traction substations also bear the power supply of 10kV power load of industrial and agricultural users in railway regions. In addition to the conventional common three-phase transformer of the power system, the traction transformer also usually adopts special junction transformers, such as single-phase junction, VV junction, scott junction, impedance matching balance junction, etc., to meet the special requirements of the traction load. In the junction area of the electrified railway, the places with more concentrated railway facilities such as passenger stations, marshalling stations, electric locomotive service sections and the like, because station lines are long in extension and the number of station tracks is large, the structure and configuration of a contact network are complex, and the operation of passenger and freight transportation meeting, marshalling and electric locomotive preparation is busy, the probability of the fault of a traction network in the area is increased.

Therefore, in practical applications, the UPS is required to ensure stable operation of the power supply system. UPS (Uninterruptible Power System/Uninterruptible Power Supply), that is, an Uninterruptible Power Supply, is a System device in which a storage battery (mostly a lead-acid maintenance-free storage battery) is connected to a host, and a direct current is converted into a city Power by a module circuit such as a host inverter. The power supply device is mainly used for providing stable and uninterrupted power supply for a single computer, a computer network system or other power electronic equipment such as an electromagnetic valve, a pressure transmitter and the like. When the commercial power input is normal, the UPS supplies the commercial power to the load for use after stabilizing the voltage, and the UPS is an alternating current type voltage stabilizer and also charges the battery in the machine; when the commercial power is interrupted (power failure in accident), the UPS immediately supplies the direct current electric energy of the battery to the load by a method of switching and converting the inverter to continuously supply 220V alternating current to the load, so that the load keeps normal work and the software and hardware of the load are protected from being damaged. UPS devices typically provide protection against either excessive voltage or insufficient voltage.

The UPS has the following characteristics:

1) the UPS is a third generation power frequency pure online intelligent UPS developed by a brand new digital technology aiming at the reliability requirements of China power grid environment, network monitoring, network systems, medical systems and the like on power supplies and overcoming the problem that the power supply power grid environment is increasingly severe caused by centralized power supply of medium and large computer network systems.

2) A UPS and a DC power supply are important power supply guarantee equipment of enterprises, and the traditional maintenance management comprises ① daily inspection appearance, regular replacement of vulnerable parts such as a battery, a filter capacitor and a fan, battery activation during overhaul and the like, ② transformation or replacement equipment and use of advanced tools to test the performance of the battery.

3) UPS's chinese means "uninterrupted Power source", is the abbreviation of english "universal Power System/universal Power Supply", and it can ensure that computer System continues to work for a period of time after the Power failure to make the user can save the dish promptly, makes the user not influence work or lose data because of the Power failure.

However, the conventional UPS can only input two 380V power supplies at the same time, cannot realize the simultaneous input of a single/three-phase power supply, and has the technical characteristics that the conventional UPS cannot cope with the input of a severe power supply, so that almost all UPS power supplies cannot bear the influence of the quality of the severe power supply of a contact network when the contact network power supply is used for supplying power instead of a through line, and the damage of the UPS power supply is often caused.

The existing railway power supply UPS equipment has the following defects:

1. at present, UPS power supply products in the industry cannot accept single-phase and three-phase power supply input at the same time, cannot receive power according to a railway power supply mode, and cannot only access a single power supply to impact load power utilization in a railway station without two paths of three-phase power, so that the running safety is damaged;

2. the input power supply of the ordinary UPS can not bear the fluctuation of the input power supply voltage within +/-40 percent, and when a contact network is adopted for supplying power, a purification power supply device is required;

3. the ordinary UPS adopts SCR technology to carry out voltage stabilization and rectification, and the SCR technology can generate a large amount of harmonic waves when the load is light load and half load, and can cause serious pollution to other electric equipment and a power grid in a station.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the defect that railway power supply UPS equipment exists among the prior art, provided a communication signal intelligence broad width steady voltage UPS equipment, satisfied the different power of multichannel standard and adopted the PWM technique simultaneously, realized the incessant power supply of circuit output when having reduced the harmonic pollution of electric wire netting, do not have the condition of switching the power down, promoted circuit system's reliability and security greatly.

The utility model discloses a following technical scheme realizes:

an intelligent wide-range voltage-stabilizing UPS device for communication signals comprises a multi-path input power supply processing module, a PWM rectification module, an inversion module and a power distribution output module;

the multi-channel input power supply processing module can simultaneously receive external multi-channel alternating current power supplies with different systems;

the PWM rectification module rectifies, filters and parallels the input multi-path alternating current power supplies with different systems, and then outputs a stable direct current bus power supply to the inversion module through the voltage stabilization of the switching power supply;

the inversion module is provided with an output isolation transformer, inverts an input direct-current bus power supply into alternating-current power supplies of different systems, and transmits the alternating-current power supplies of different systems to the power distribution output module through the output isolation transformer;

the power distribution output module comprises an intelligent power supply screen, and the intelligent power supply screen outputs power to supply different loads.

In order to better realize the utility model discloses, furtherly, multichannel input power supply processing module adopts different processing circuit to handle according to the different alternating current power supply's of the multichannel standard of input particular case.

In order to better realize the utility model, furthermore, the multipath input power supply processing module comprises a lightning protection unit and a multiple filtering unit; the lightning protection unit comprises a lightning arrester and a cable feed.

In order to better realize the utility model, furthermore, the main loop of the PWM rectifier module comprises a bridge rectifier unit, a parallel operation input unit, a filtering voltage-dividing unit, an IGBT unit, a Rcd peak absorption unit, a driving voltage-limiting unit, a filtering unit and an output end unit;

the bridge rectifier unit adopts a bridge rectifier circuit to rectify a plurality of paths of different AC power supplies into a plurality of paths of DC power supplies;

the parallel machine input unit is connected with the filtering and voltage dividing unit, receives the rectified multi-path direct current circuit and parallel machines the multi-path direct current circuit into an unstable direct current bus power supply;

the filtering and voltage dividing unit is connected with the IGBT module and is used for filtering and dividing the unstable direct-current bus power supply sent by the parallel operation input unit;

the IGBT of the IGBT module is connected with an Rcd peak value absorption unit and a driving voltage limiting unit, and PWM conversion is carried out on the unstable direct-current bus power supply after filtering and voltage division to generate a stable direct-current bus power supply;

the filtering unit is connected behind the IGBT unit and is used for filtering the stable direct-current bus power supply sent by the IGBT unit;

and the output end unit inputs the stable direct current bus power supply subjected to filtering processing into the inversion module for subsequent processing.

In order to better realize the utility model, the PWM rectifier module further comprises a control power supply unit and a shunt unit; the control power supply unit is connected with the main loop of the PWM rectification module and can receive power supplies from a contact net and a through wire; the shunt unit is connected between the output end unit and the filter unit, and can divide the output alternating current into corresponding alternating current according to the requirement of the actual situation so as to supply the load to use.

In order to better realize the utility model, furthermore, the PWM rectifier module adopts double closed-loop control; the switching frequency of the IGBT unit is selected to be below 20 KHZ; the direct-current output voltage of the PWM rectification module is 390V-400V; the duty ratio of the PWM rectifying module is selected to be between 85% and 90%.

In order to better realize the utility model, further, the inversion module comprises a DSP control unit, a detection feedback unit and a three-phase sine wave pulse width modulation circuit;

the DSP control unit comprises an RAM, a reset circuit, an optical coupling isolation circuit and a DSP single chip microcomputer chip;

the detection feedback unit comprises three detection units, namely a voltage detection unit, a current detection unit and a short circuit detection unit; the detection feedback unit is connected with the DSP singlechip chip and the three-phase sine wave pulse width modulation circuit, and feeds back the voltage, the current and the short circuit condition of the three-phase sine wave pulse width modulation circuit detected by the voltage detection unit, the current detection unit and the short circuit detection unit to the DSO singlechip chip;

the three-phase sine wave pulse width modulation circuit is connected with the detection feedback unit and the DSP control unit, adopts a three-phase bridge circuit and comprises 6 IGBT modules;

in order to better realize the utility model, furthermore, the inversion module adopts double closed loop control; the feedback unit adopts an analog circuit for sampling, and inputs the sampling result into a DSP single chip of the DSP control unit for closed-loop control by an algorithm.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

1) the direct current parallel operation mode can realize the simultaneous input of single-phase power supply and three-phase power supply and multiple power supplies, and breaks through the limitation that the conventional UPS power supply system only allows two paths and must be 380V power supplies at the same time.

2) A contact network single-phase power transformer is adopted, high voltage 27.5Kv is changed into 0.46Kv, the power is fed to a PWM module through a low-voltage cable, and a multiple lightning arrester and cable power feed are arranged to be used as lightning protection of an input end, so that when the voltage of a contact network fluctuates between minus 45% and plus 35%, the output voltage can be kept within a range of plus or minus 2%.

3) And a PWM technology is adopted to replace a controllable rectification technology, so that harmonic pollution to a power grid is reduced.

Drawings

FIG. 1 is a general flow chart;

FIG. 2 is a diagram of the main loop and control loop of the PWM module;

FIG. 3 is a diagram of the front end of an IGBT driving electrode of an SPWM module connected with a DSP;

FIG. 4 is a technical flow chart of the operation principle of the inverter unit;

fig. 5 is a processing circuit diagram of 460V input of a single-phase contact network of a multi-input system;

fig. 6 is a processing circuit diagram of 220V input of a single-phase contact network of a multi-input system.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments, and therefore should not be considered as limitations to the scope of protection. Based on the embodiments in the present invention, all other embodiments obtained by the staff of ordinary skill in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

an intelligent wide-width voltage-stabilizing UPS device for communication signals is shown in figure 1 and comprises a multi-path input power supply processing module, a PWM rectification module, an inversion module and a power distribution output module;

the multi-channel input power supply processing module can simultaneously receive external multi-channel alternating current power supplies with different systems, and different circuits are selected for processing according to different field environments and different input power supplies;

The working principle is as follows: the utility model discloses can insert the alternating current power supply of the different system of multichannel, as shown in figure 1, insert three routes input power simultaneously, each way power can all be single phase alternating current power supply, also can be three-phase alternating current power supply, equipment carries out the lightning protection to the alternating current power supply of different systems and after filtering, converts the alternating current power supply after handling into DC power supply through PWM rectifier module respectively, and the multichannel DC power supply after will rectifying is finally combined and is sent into in the inverter unit for a DC bus power supply; the contravariant unit can be different for multichannel single phase AC power and three-phase AC power through the SPWM contravariant with DC bus power, and is different according to the demand of actual conditions, sends into the electric current of output intelligent power screen for the load through isolation transformer, and this equipment adopts direct current parallel operation mode in normal work, as long as there is the power of arbitrary all the way in the multichannel electric current of guarantee input, just can ensure output uninterrupted power supply, and does not have the problem of switching power failure.

Example 2:

in order to better implement the present invention, on the basis of embodiment 1, as shown in fig. 5 and fig. 6, further, the multiple input power processing module is connected to different voltages according to different actual conditions, and adopts different circuits according to different voltages; the multi-path input power supply processing module comprises a lightning protection unit and a multi-filtering unit, and is used for performing lightning protection processing and multi-filtering on the received alternating current power supplies with different multi-path systems; the lightning protection unit comprises a lightning arrester and a cable feed.

The working principle is as follows: for different practical situations, different power supplies are connected, and different processing methods are adopted, so that different circuits are adopted for processing, as shown in fig. 5, a power supply with a high voltage of 27.5Kv is changed into 0.46Kv through a single-phase power transformer of a contact network, the power is fed to a PWM rectification module through a low-voltage cable, and a lightning protection with a multiple lightning arrester and cable feed as input ends is arranged in the circuit, so as to protect the safety of circuit equipment. As shown in fig. 6, after filtering and lightning protection, a 220V power supply of a contact network is boosted to 460V alternating current, and the alternating current is input to a PWM rectification module; wherein, the circuit selects double pi type filtering to carry out filtering processing.

Other parts of this embodiment are the same as embodiment 1, and thus are not described again.

Example 3:

in order to better realize the utility model, on the basis of the embodiments 1-2, with reference to fig. 2, further, the PWM rectifier module main loop includes a bridge rectifier unit, a parallel machine input unit, a filter voltage dividing unit, an IGBT unit, an Rcd peak absorption unit, a filter unit, and an output end unit;

the bridge rectifier unit adopts a bridge rectifier circuit to rectify a plurality of paths of different alternating current power supplies into a plurality of paths of direct current power supplies, and the bridge rectifier circuit adopts a general circuit structure and is not shown in FIG. 2;

the filtering voltage division unit and the IGBT module are used for filtering and dividing the unstable direct current bus power supply sent by the parallel machine input unit;

The working principle is as follows: as shown in fig. 2:

i09, I10, I11 and I12 which are output end units, are DC400V power supplies which are output after the PWM processing of multiple power supplies and are connected to ports of the inverter module;

i13, I14, I15 and I16 which are parallel machine input units and are connected with the ports of the input end power supply, and the ports are used for rectifying and parallel machine input PWM rectification modules after input transformation, lightning protection and filtering;

4. 6, the port is a power supply of a contact net and is connected with a 460V: the 220V control transformer is input into a control power supply unit of the PWM rectification module;

9. 12, the port is a control power supply unit which directly inputs 220V of a through wire power supply to the PWM rectification module;

i17 and I18, the port is a double-power transfer switch power supply;

e1, E3, C1, C4, R2 and R5 form a filtering voltage division unit and play a role in filtering and voltage division;

c2, D1 and R1 form an Rcd peak absorption unit;

r3, Z1 and Z2 are driving voltage limiting units;

q1 and D2 are IGBT modules;

l1, E2, C3 and R4 are filter units;

when the alternating current power supplies with different multi-channel systems are converted into the direct current bus power supply through the bridge circuit, the direct current bus power supply with stable high quality can be obtained by filtering and stabilizing voltage through the circuit shown in figure 2, wherein the alternating current power supply is unstable and low in quality.

The other parts of this embodiment are the same as those of the above embodiments 1-2, and thus are not described again.

Example 4:

in order to better implement the present invention, on the basis of embodiments 1-3, in conjunction with fig. 2, further, the PWM rectifier module needs to satisfy the following conditions:

1) according to the requirement of the output voltage, the direct current output voltage 390-400V of the PWM rectification module is artificially given;

2) the duty ratio of the PWM rectification module is selected to be between 85% and 90%;

3) the switching frequency of the IGBT is selected to be below 20 KHz;

4) the dynamic quality of the power supply is improved by adopting double closed-loop control.

The other parts of this embodiment are the same as those of embodiments 1 to 3, and thus are not described again.

Example 5:

in order to better implement the present invention, on the basis of embodiments 1 to 4, with reference to fig. 2, further, the PWM rectification module further includes a control power supply unit and a shunt unit; the control power supply unit is connected with the main loop of the PWM rectification module and can receive power supplies from a contact net and a through wire; the shunt unit is connected between the output end unit and the filter unit, and can divide the output alternating current into corresponding alternating current according to the requirement of the actual situation so as to supply the load to use.

The working principle is as follows: the control power supply unit can be connected with power supply input of the through net and the contact net, so that the equipment is suitable for different environments in specific application and has higher practicability; the shunt unit can divide the finally obtained alternating current power supply into multiple paths of alternating current power supplies of different systems so as to meet the use of loads under different conditions.

The other parts of this embodiment are the same as those of embodiments 1 to 4, and therefore, the description thereof is omitted.

Example 6:

in order to better implement the present invention, on the basis of embodiments 1-5, with reference to fig. 3 and 4, further, the inverter module includes a DSP control unit, a detection feedback unit, and a three-phase sine wave pulse width modulation circuit;

the three-phase sine wave pulse width modulation circuit is connected with the detection feedback unit and the DSP control unit, adopts a three-phase bridge circuit and comprises 6 IGBT modules.

The working principle is as follows: the DSP control unit comprises an RAM, a reset circuit, an optical coupling isolation circuit and a DSP single chip microcomputer chip; as can be seen from fig. 3, the detection feedback unit is connected with six IGBT modules of the three-phase sine wave pulse width modulation circuit and the DSP single chip microcomputer chip; the detection feedback unit detects the PWM rectification module through the detection units of current, voltage and short circuit and feeds back a detection result to the DSP singlechip chip, wherein the current detection unit is connected with an AD1 end of the DSP, the voltage detection unit is connected with an AD2 end of the DSP singlechip chip, and the short circuit detection unit is connected with a PWM blocking end of the DSP singlechip chip; the DSP is respectively connected with the six IGBT modules through SPWM1-6 ports to control and generate a single/three-phase alternating current power supply; as shown in fig. 4, the DSP module further includes an optical coupling isolation circuit, a reset circuit, a RAM, and other units, which are conventional in the art and therefore are not specifically shown in fig. 3.

The other parts of this embodiment are the same as those of embodiments 1 to 5, and thus are not described again.

Example 7:

in order to better implement the present invention, on the basis of embodiments 1 to 6, further, the inverter module needs to satisfy the following conditions:

1) the duty ratio of the inversion module is selected to be 75%;

2) the switching frequency of 6 IGBT in the inverter module is selected to be below 20 KHz;

3) the inversion module adopts double closed-loop control to improve the dynamic quality of the power supply;

4) and a feedback link of the inversion module adopts an analog circuit for sampling, inputs the sampled data into the DSP and performs closed-loop control by using an algorithm, thereby realizing feedback.

The other parts of this embodiment are the same as those of embodiments 1 to 6, and thus are not described again.

The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.

Claims

1. An intelligent wide-range voltage-stabilizing UPS device for communication signals is characterized by comprising a multi-path input power supply processing module, a PWM rectification module, an inversion module and a power distribution output module;

2. The intelligent wide-width voltage-stabilizing UPS equipment of claim 1, wherein the multiple input power supply processing module adopts different processing circuits to process according to the specific situation of the input multiple AC power supplies with different systems.

3. The intelligent wide-width voltage-stabilizing UPS equipment of claim 2, wherein the multi-input power processing module comprises a lightning protection unit and a multi-filtering unit; the lightning protection unit comprises a lightning arrester and a cable feed.

4. The intelligent wide-width voltage-stabilizing UPS equipment of claim 1, wherein the main loop of the PWM rectification module comprises a bridge rectification unit, a parallel operation input unit, a filtering voltage-dividing unit, an IGBT unit, an Rcd peak absorption unit, a driving voltage-limiting unit, a filtering unit and an output end unit;

5. The intelligent wide-width voltage-stabilizing UPS equipment of claim 4, wherein the PWM rectification module further comprises a control power supply unit and a shunt unit; the control power supply unit is connected with the main loop of the PWM rectification module and can receive power supplies from a contact net and a through wire; the shunt unit is connected between the output end unit and the filter unit, and can divide the output alternating current into corresponding alternating current according to the requirement of the actual situation so as to supply the load to use.

6. The intelligent wide-width voltage-stabilizing UPS equipment of claim 5, wherein the PWM rectification module adopts double closed-loop control; the switching frequency of the IGBT unit is selected to be below 20 KHZ; the direct-current output voltage of the PWM rectification module is 390V-400V; the duty ratio of the PWM rectifying module is selected to be between 85% and 90%.

7. The intelligent wide-width voltage-stabilizing UPS equipment of claim 1, wherein the inversion module comprises a DSP control unit, a detection feedback unit, a three-phase sine wave pulse width modulation circuit;

8. The intelligent wide-width voltage-stabilizing UPS equipment of claim 7, wherein the inversion module adopts double closed loop control; the feedback unit adopts an analog circuit for sampling, and inputs the sampling result into a DSP single chip of the DSP control unit for closed-loop control by an algorithm.