CN110739682A - intelligent wide-range voltage-stabilizing UPS (uninterrupted power supply) equipment for communication signals - Google Patents
intelligent wide-range voltage-stabilizing UPS (uninterrupted power supply) equipment for communication signals Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—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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Abstract
The invention relates to kinds of communication signal intelligent wide-width voltage-stabilizing UPS equipment, which comprises a multi-path input power supply processing module, a PWM (pulse-width modulation) rectification module, an inversion module and a power distribution output module, wherein the multi-path input power supply processing module is connected with a plurality of paths of alternating current power supplies with different systems, the input power supplies are subjected to filtering lightning protection processing, the PWM rectification module rectifies the processed plurality of paths of alternating current power supplies with different systems into a plurality of paths of direct current power supplies, the plurality of paths of direct current power supplies are combined into direct current bus power supplies to be sent to the inversion module, the inversion module inverts the sent direct current bus power supplies into different alternating current power supplies through SPWM (sinusoidal pulse width modulation) technology, the alternating current power supplies are sent to the power distribution output module through an output isolation transformer.
Description
Technical Field
The invention belongs to the field of power supply of communication equipment, and particularly relates to kinds of intelligent wide-amplitude voltage-stabilizing UPS equipment for communication signals.
Background
The power system is organic integrations from power generation, power transmission, power transformation, power distribution to power utilization, the power source 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, 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, namely power supply and traction power supply, the power supply system provides reliable power guarantee for services such as dispatching command, communication signals and passenger service, and the traction power supply system provides electric energy for electric locomotives (motor train units) of the electrified railway.
The power supply system is composed of load power through lines arranged along the whole railway and comprehensive power through lines , the power through line is usually 10kV, the power supply distance is 30-50km, in special cases, if a Qinghai-Tibet railway adopts 35kV voltage, communication, signals and comprehensive regulation systems related to driving along a line with the power supply distance exceeding 100 km. are mainly supplied by load power through lines, the comprehensive power through lines are standby, other electric loads and power supplies used by traction substations are supplied by the comprehensive power through lines, 10kV box-type substations are arranged at power points in each power consumption interval, two mutually independent incoming line power supplies of the substation are supplied by a public power grid, the incoming line voltage grades are 10kV, 35kV, 110kV, 220kV and the like, the electric loads are divided into two categories of station loads and interval loads, the station loads are mainly communication, signals, disaster prevention alarm, automatic ticket inspection, ticket service, electric power monitoring, fire fighting systems, various water pumps, various types of air conditioners, automatic elevator stations, lighting repeater stations, lighting equipment, electric heating equipment, lighting equipment, communication, lighting equipment, and the like according to three important levels, the three categories of communication, the communication, signal monitoring, signal, disaster prevention alarm, monitoring, lighting equipment, monitoring, lighting equipment, monitoring, lighting equipment and the most important monitoring.
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.
The UPS (Uninterruptible Power System/Uninterruptible Power Supply) is a System device which connects a storage battery (mostly a lead-acid maintenance-free storage battery) with a host and converts direct current into city commercial Power through a module circuit such as a host inverter and the like, 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.
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 guarantee that computer System continues to work hours 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. UPS power supply products in the industry at present cannot accept single-phase and three-phase power supply input simultaneously, cannot receive power according to a railway power supply mode, and cannot receive power in a railway station without two paths of three-phase power, and the impact load power utilization of the UPS power supply products can only be connected into a single power supply, so that the damage to the driving safety is avoided.
2. The common UPS power supply input power supply can not bear the fluctuation of the input power supply voltage within +/-40%, and when a contact net is adopted for power supply, 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.
Disclosure of Invention
Aiming at the defects of railway power supply UPS equipment in the prior art, the invention provides kinds of communication signal intelligent wide-range voltage-stabilizing UPS equipment, which meets the requirement that different power supplies of multiple systems adopt PWM technology at the same time, reduces harmonic pollution of a power grid, realizes uninterrupted power supply of circuit output, does not have the condition of switching power failure, and greatly improves the reliability and safety of a circuit system.
The invention is realized by the following technical scheme:
kinds of communication signal intelligent wide voltage-stabilizing UPS equipment 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.
To better implement the present invention, the multiple power input module includes a lightning protection unit and a multiple filtering unit, and performs lightning protection and multiple filtering on the received multiple ac power sources with different systems.
In order to better realize the invention, steps are carried out, the PWM rectification module firstly rectifies input multi-path alternating current power supplies with different systems into multi-path direct current power supplies in work, then combines the multi-path direct current power supplies into a direct current bus power supply, and the PWM rectification module adopts a single IGBT as a main module of the PWM rectification module.
To better implement the present invention, step is proceeded that 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.
To better implement the present invention, step is further provided that the PWM rectifier module can receive multiple ac power supplies of different systems simultaneously, and for the ac power supplies of different systems, the processing method is as follows:
1) for a single-phase alternating current power supply, transforming and boosting the input single-phase alternating current power supply, rectifying the boosted single-phase alternating current power supply into a single-phase direct current power supply, filtering the obtained single-phase direct current power supply, and then enabling the filtered single-phase direct current power supply and the single-phase direct current power supply or the three-phase direct current power supply obtained from other paths to be in parallel flow to form direct current bus power supplies;
2) for a three-phase alternating current unit, an input three-phase alternating current power supply is rectified into a three-phase direct current power supply, then the obtained three-phase direct current power supply is filtered, and then the filtered three-phase direct current power supply and a single-phase direct current power supply or a three-phase direct current power supply obtained from other paths are parallelly flowed into direct current bus power supplies.
In order to better realize the invention, steps are carried out, the inversion module adopts a DC → AC inversion technology and adopts a DSP to control, a direct current bus power supply input into the inversion module is inverted into an alternating current power supply, the inversion module adopts a three-phase bridge circuit as a main module and comprises 6 IGBTs, and the DSP real-time control circuit generates single-phase and three-phase alternating current voltages.
In order to better implement the present invention, step is further performed, 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) the inversion module adopts an analog circuit for sampling, inputs the sampling into the DSP and carries out closed-loop control by using an algorithm, thereby realizing feedback.
To better implement the present invention, is further configured to connect different voltages to the multiple input power processing module according to different situations, and to use different circuits according to different voltages.
Compared with the prior art, the invention has the following advantages and beneficial effects:
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 drawings in the embodiments of the present invention, it should be understood that the described embodiments are only a partial embodiment of the present invention, rather than a complete embodiment, and therefore should not be considered as a limitation to the protection scope.
Example 1:
kinds of communication signal intelligent wide-width voltage-stabilizing UPS equipment, as shown in figure 1, comprises a multi-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 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.
The working principle is that the device can be connected with multiple paths of alternating current power supplies of different systems, as shown in figure 1, three paths of input power supplies are simultaneously connected, each path of power supply can be a single-phase alternating current power supply or a three-phase alternating current power supply, the device carries out lightning protection processing and filtering on the alternating current power supplies of different systems, the processed alternating current power supplies are respectively converted into direct current power supplies through a PWM (pulse width modulation) rectification module, finally the rectified multiple paths of direct current power supplies are combined into direct current bus power supplies to be sent into an inversion unit, the inversion unit can invert the direct current bus power supplies into multiple paths of single-phase alternating current power supplies and three-phase alternating current power supplies through SPWM, the output currents are sent into an intelligent power supply screen to be supplied to a load through an isolation transformer according to different requirements of practical situations, the device adopts a direct current parallel operation mode in normal work, and the problem of switching power failure can be avoided as long as any path of power supplies in.
Example 2:
in order to better implement the present invention, as shown in fig. 5 and fig. 6, is further performed, the multiple-input power processing module is connected to different voltages according to different actual situations, and adopts different circuits according to different voltages, and the multiple-input power processing module includes a lightning protection unit and a multiple filtering unit, and performs lightning protection processing and multiple filtering on the received multiple ac power supplies of different systems.
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 implement the invention, steps are carried out, as shown in fig. 2, the PWM rectifier module rectifies the input multiple paths of different systems of ac power into multiple paths of dc power through a bridge rectifier circuit, then combines the multiple paths of dc power into a dc bus power, sends the combined dc bus power into the circuit shown in fig. 2, and outputs a stable dc bus through IGBT conversion and filtering, and the PWM rectifier module uses a single IGBT as the main module of the PWM rectifier module.
The working principle is as follows: 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:
to better implement the present invention, step is proceeded that 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:
to better implement the present invention, step is further provided that the PWM rectifier module can receive multiple ac power supplies of different systems simultaneously, and for the ac power supplies of different systems, the processing method is as follows:
1) for a single-phase alternating current power supply, transforming and boosting the input single-phase alternating current power supply, rectifying the boosted single-phase alternating current power supply into a single-phase direct current power supply, filtering the obtained single-phase direct current power supply, and then enabling the filtered single-phase direct current power supply and the single-phase direct current power supply or the three-phase direct current power supply obtained from other paths to be in parallel flow to form direct current bus power supplies;
2) for a three-phase alternating current unit, an input three-phase alternating current power supply is rectified into a three-phase direct current power supply, then the obtained three-phase direct current power supply is filtered, and then the filtered three-phase direct current power supply and a single-phase direct current power supply or a three-phase direct current power supply obtained from other paths are parallelly flowed into direct current bus power supplies.
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, steps are carried out, as shown in fig. 3 and 4, the inverter module adopts DC → AC inverter technology and adopts DSP to control, the DC bus power input to the inverter module is inverted into AC power, the inverter module adopts three-phase bridge circuit as main module and includes 6 IGBTs, and the DSP real-time control circuit generates single and three-phase AC voltage.
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, as shown in fig. 3 and 4, step is performed, 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 description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (8)
- The intelligent wide-amplitude voltage-stabilizing UPS equipment for the communication signals of 1 and types is characterized by comprising a multi-path input power supply processing module, a PWM (pulse-width modulation) rectifying module, an inverting 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.
- 2. The kinds of communication signal intelligent wide-width voltage-stabilizing UPS equipment of claim 1, wherein the multi-path power input module includes a lightning protection unit and a multi-filtering unit, and performs lightning protection processing and multi-filtering on the received multi-path different AC power.
- 3. The kinds of communication signal intelligent wide-width voltage-stabilizing UPS equipment of claim 1, wherein the PWM rectification module firstly rectifies the input multiple AC power supplies of different systems into multiple DC power supplies in operation, then combines the multiple DC power supplies into a DC bus power supply, and the PWM rectification module uses a single IGBT as the main module of the PWM rectification module.
- 4. The kinds of communication signal intelligent wide-width voltage-stabilizing UPS equipment of claim 3, wherein the PWM rectification module is required to satisfy the following condition:according to the requirement of the output voltage, the direct current output voltage 390-400V of the PWM rectification module is artificially given;the duty ratio of the PWM rectification module is selected to be between 85% and 90%;the switching frequency of the IGBT is selected to be below 20 KHz;the dynamic quality of the power supply is improved by adopting double closed-loop control.
- 5. The kinds of communication signal intelligence broad width steady voltage UPS equipment of claim 4, wherein, the PWM rectification module can receive a plurality of AC power supplies of different standards at the same time, for the AC power supplies of different standards, its processing method is as follows:for a single-phase alternating current power supply, transforming and boosting the input single-phase alternating current power supply, rectifying the boosted single-phase alternating current power supply into a single-phase direct current power supply, filtering the obtained single-phase direct current power supply, and then enabling the filtered single-phase direct current power supply and the single-phase direct current power supply or the three-phase direct current power supply obtained from other paths to be in parallel flow to form direct current bus power supplies;for a three-phase alternating current unit, an input three-phase alternating current power supply is rectified into a three-phase direct current power supply, then the obtained three-phase direct current power supply is filtered, and then the filtered three-phase direct current power supply and a single-phase direct current power supply or a three-phase direct current power supply obtained from other paths are parallelly flowed into direct current bus power supplies.
- 6. The kinds of intelligent communication signal wide-width voltage-stabilizing UPS equipment of claim 1, wherein the inverter module adopts DC → AC inverter technology and DSP for control to invert the DC bus power supply input to the inverter module into AC power supply, the inverter module adopts three-phase bridge circuit as main module and includes 6 IGBTs, and the DSP real-time control circuit generates single and three-phase AC voltage.
- 7. The kinds of communication signal intelligent wide-width voltage-stabilizing UPS equipment of claim 1, wherein the inversion module needs to satisfy the following condition: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) the inversion module adopts an analog circuit for sampling, inputs the sampling into the DSP and carries out closed-loop control by using an algorithm, thereby realizing feedback.
- 8. The kinds of communication signal intelligent wide-width voltage-stabilizing UPS device of claim 1, wherein the multiple input power supply processing module is connected with different voltages according to different actual conditions, and different circuits are adopted according to different voltages.
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