CN110601562B - Novel radar power distribution system control method - Google Patents
Novel radar power distribution system control method Download PDFInfo
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- CN110601562B CN110601562B CN201910713691.2A CN201910713691A CN110601562B CN 110601562 B CN110601562 B CN 110601562B CN 201910713691 A CN201910713691 A CN 201910713691A CN 110601562 B CN110601562 B CN 110601562B
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
Abstract
The invention relates to a control method of a novel radar power distribution system, which comprises an input power supply, a soft start circuit, a rectifying circuit, an output contactor KM103 and a control circuit, wherein the output end of the input power supply is electrically connected with the soft start circuit, the soft start circuit is electrically connected with the rectifying circuit, the rectifying circuit is electrically connected with the output contactor KM103, one end of the control circuit is electrically connected with the soft start circuit, the other end of the control circuit is electrically connected with the output contactor KM103, and the output contactor KM103 is also connected with external equipment through a capacitor. The invention can restrain the oscillation in the range of the input voltage of the array surface DC/DC converter, and effectively solves the problem that the input voltage of the array surface DC/DC converter is oscillated due to long-line transmission to cause loss and even failure.
Description
Technical Field
The invention relates to the technical field of radar rectification power supplies, in particular to a control method of a novel radar power distribution system.
Background
With the increasing requirements for integration and automation of radar systems, the requirements for the functions and performance of radar power supply systems are gradually increased, which not only shows the power of the power supply, but also shows the efficiency and power factor of power consumers for power supplies, and the requirements for the control functions of power supplies in various environments and occasions are gradually increased.
The invention patent with publication number "CN 106329328A" (application date 20161026) discloses a radar distribution branch system, which comprises the following components: the device comprises a first transmitting connector, a first comprehensive power connector, a first auxiliary device connector, a second comprehensive power connector, a second transmitting connector, a lightning arrester, a first driving three-phase connector, a second driving three-phase connector, air circuit breakers, 3P direct-key switches, a digital voltmeter, a metal film resistor R1, an hour counter, a phase control relay and signal lamps. The system can realize the purpose of controlling and outputting one-way three-phase alternating current input and multi-way alternating current/three-phase alternating current, functionally realize the basic effects of lightning protection, phase failure indication and startup timing, has strong bearing capacity and good universality, and is particularly suitable for being used in radar power distribution equipment below 10 KW.
However, the power supply system mainly adopts three-phase 380V power frequency alternating current which is converted into direct current 520V high voltage by an AC/DC converter on the ground and is transmitted to an antenna array surface of the radar, and then the direct current required by the antenna array surface equipment is converted into direct current for the second time by the DC/DC converter of the antenna array surface; however, the problem of long-line transmission of the output of the AC/DC converter on the ground exists, and particularly when the pulse load works, the long-line transmission can cause the voltage at the input end of the front surface DC/DC converter to oscillate, so that loss and even failure are caused to the DC/DC converter.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a novel power distribution system control method for radar, so as to solve the problem that the long-line transmission in the background art causes the voltage at the input end of the front-side DC/DC converter to oscillate, which causes the DC/DC converter to be damaged or even to fail.
In order to solve the above problems, the present invention provides the following technical solutions:
a novel power distribution system control method for radar is characterized in that an upper computer issues a command to a single chip microcomputer, the single chip microcomputer controls a rectification power supply to work, the power distribution system control method comprises a plurality of sets of rectification power supplies, a plurality of sets of DAM assemblies and the upper computer, the plurality of sets of rectification power supplies form a rectification power supply network used for supplying power to a radar system, the power supply network is electrically connected with the DAM assemblies, and the power supply network is also electrically connected with the upper computer;
the DAM component comprises a 3KW centralized DC/DC power supply A, a 3KW centralized DC/DC power supply B, DAM auxiliary power supply and a plurality of distributed DC/DC power supplies, wherein the 3KW centralized DC/DC power supply A is connected with the plurality of distributed DC/DC power supplies, the 3KW centralized DC/DC power supply B is connected with the plurality of distributed DC/DC power supplies, each distributed DC/DC power supply is connected with DAM component equipment, meanwhile, the 3KW centralized DC/DC power supply A and the 3KW centralized DC/DC power supply B, DAM auxiliary power supplies are also connected with the DAM component equipment, and the DAM component is connected with an external radar system;
the rectification power supply comprises an input power supply, a soft start circuit, a rectification circuit, an output contactor KM103 and a control circuit, wherein the output end of the input power supply is electrically connected with the soft start circuit, the soft start circuit is electrically connected with the input end of the rectification circuit, the output end of the rectification circuit is electrically connected with the output contactor KM103, one end of the control circuit is electrically connected with the soft start circuit, the other end of the control circuit is electrically connected with the output contactor KM103, the output contactor KM103 is further connected with external equipment through a capacitor, and the capacitor is arranged on the ground;
the rectification power supply comprises an input power supply, a soft start circuit, a rectification circuit, an output contactor KM103 and a control circuit, wherein the output end of the input power supply is electrically connected with the soft start circuit, the soft start circuit is electrically connected with the input end of the rectification circuit, the output end of the rectification circuit is electrically connected with the output contactor KM103, one end of the control circuit is electrically connected with the soft start circuit, the other end of the control circuit is electrically connected with the output contactor KM103, the output contactor KM103 is further connected with external equipment through a capacitor, and the capacitor is arranged on the ground;
the soft start circuit comprises an input main contactor KM101, an input soft start contactor KM102 and a resistor R1, wherein one end of the input soft start contactor KM102 is electrically connected with one end of a resistor R1, the other end of the input soft start contactor KM102 is connected with one end of the input main contactor KM101, and the other end of the input main contactor KM101 is electrically connected with a rectifying circuit;
the single chip microcomputer is electrically connected with a control coil of the output contactor KM103, the input end of the output contactor KM103 is electrically connected with one end of a control circuit, and the single chip microcomputer is further connected with an upper computer;
the control method for the work of each rectification power supply comprises an input soft start time sequence control method and comprises the following steps of;
s1, setting V1 in advance, then sending a power-on command through an upper computer, judging whether the standby state of the rectified power supply has an abnormal state by the single chip microcomputer, if the standby state of the rectified power supply has the abnormal state, not executing a power-on soft start time sequence, and if the standby state of the rectified power supply does not have the abnormal state, sequentially attracting the output contactor KM103 and the input soft start contactor KM 102;
s2, inputting waiting time t1 seconds after the soft start contactor KM102 is attracted; if the single chip microcomputer monitors that the output voltage rises to be more than V1 within the time t1, the single chip microcomputer is continuously started, and otherwise, the input soft start contactor KM102 and the output contactor KM103 are disconnected;
s3, if the output voltage rises to be more than V1, judging whether the output voltage is maintained to be more than V1 within the time t1 to time t2, and if the output voltage is maintained to be more than V1 within the time t1, controlling the input main contactor KM101 to attract and inputting the soft start time sequence to end if the output voltage is maintained to be more than V1 within the time t1 to time t2, otherwise disconnecting the input soft start contactor KM102 and the output contactor KM103,
the power supply control circuit comprises an input power supply, a soft start circuit, a rectifying circuit, an output contactor KM103 and a control circuit, wherein the output end of the input power supply is electrically connected with the soft start circuit, the soft start circuit is electrically connected with the input end of the rectifying circuit, the output end of the rectifying circuit is electrically connected with the output contactor KM103, one end of the control circuit is electrically connected with the soft start circuit, the other end of the control circuit is electrically connected with the output contactor KM103, and the output contactor KM103 is further connected with external equipment through a capacitor;
the soft start circuit comprises an input main contactor KM101, an input soft start contactor KM102 and a resistor R1, wherein one end of the input soft start contactor KM102 is electrically connected with one end of a resistor R1, the other end of the input soft start contactor KM102 is connected with one end of the input main contactor KM101, and the other end of the input main contactor KM101 is electrically connected with a rectifying circuit.
The capacitor is added at the output end of the rectification power supply, so that oscillation can be inhibited in the range of the input voltage of the array surface DC/DC converter, and the problem of loss and even failure caused by oscillation of the input voltage of the array surface DC/DC converter due to long-line transmission is effectively solved; meanwhile, the capacitor is added at the output end of the ground rectification power supply, so that the impact current caused by the instant starting of the rectification power supply is overlarge, and the voltage drop of a power grid and the damage of devices such as a rectification bridge and the like are caused.
As a further scheme of the invention: the rectifying circuit is an 18-pulse rectifying circuit.
As a further scheme of the invention: the intelligent control system is characterized by further comprising a single chip microcomputer, wherein the single chip microcomputer is electrically connected with a control coil of the output contactor KM103, the input end of the output contactor KM103 is electrically connected with one end of a control circuit, and the single chip microcomputer is further connected with an upper computer.
The singlechip only needs to satisfy the function that can detect voltage, can purchase on the market.
A further scheme of the invention is as follows: the output of the input power supply is three-phase 380V power frequency alternating current.
The control circuit is used for controlling the input main contactor KM101 and the soft start contactor KM102 to be started and closed, the control circuit plays a role in controlling, and the function of a soft start time sequence is realized through the cooperation of the control circuit and the soft start circuit.
As a further scheme of the invention: the rectification power supply also comprises a local control circuit and a remote control circuit, wherein the local control circuit and the remote control circuit are electrically connected, the local control circuit comprises a first switch, a reverse and delay unit and a bidirectional analog switch which are electrically connected in sequence, the remote control circuit comprises a second switch, and the second switch is connected with the output end of the bidirectional analog switch through an AND gate and is used for sending a driving signal;
the control circuit and the remote control circuit are used for realizing the control of the machine and the control of the on-off by an upper computer in a remote control way; in the starting-up time sequence, the output contactor KM103 is firstly attracted, the input soft start contactor KM102 is attracted, and the main contactor KM101 is attracted and input finally; in the shutdown sequence, the output contactor KM103 is disconnected first, the input soft start contactor KM102 is disconnected, and the input main contactor KM101 is disconnected finally.
The host computer can set up in always controlling indoor, when assigning a key start command, realizes that a plurality of rectification power supply start in proper order according to the control chronogenesis on the switch, avoids the start power too big to cause the impact to the electric wire netting.
As a further scheme of the invention: the control method for the work of each rectification power supply also comprises a startup and shutdown time sequence control method, and comprises the following steps:
s21, presetting V2, attracting the output contactor KM103 when starting up, attracting the input soft start contactor KM102 by the delay time t3, wherein the power supply has output voltage which is more than or equal to V2;
s22, automatically detecting whether the working state of the rectification power supply is abnormal by the singlechip, detecting the working state of the rectification power supply and judging whether the working state is abnormal at the moment;
if an abnormal condition exists, firstly, the output contactor KM103 is disconnected, the input main contactor KM101 is disconnected within the delay time t5, the input soft start contactor KM102 is disconnected within the delay time t6, and the rectifying power supply can be shut down;
if no abnormal condition exists, delaying time t4 to pull in the main contactor KM101, and ending the starting process of the rectified power supply.
The time t3, the time t4, the time t5, the time t6 and the voltage V2 are determined by specific circuit characteristics, and are determined according to actual circuit requirements.
As a further scheme of the invention: the working conditions comprise input overvoltage, input undervoltage, input open-phase, output overcurrent, overlarge output leakage current, abnormal insulation, temperature and the like.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the capacitor is added at the output end of the rectification power supply, so that oscillation can be suppressed in the range of the input voltage of the array surface DC/DC converter, and the problem that the input voltage of the array surface DC/DC converter is damaged or even fails due to oscillation caused by long-line transmission is effectively solved; meanwhile, the capacitor is added at the output end of the ground rectification power supply, so that the impact current caused by the instant starting of the rectification power supply is overlarge, and the voltage drop of a power grid and the damage of devices such as a rectification bridge and the like are caused. Oscillation
2. The invention is also provided with a single chip microcomputer, the single chip microcomputer is connected with the output end of the output contactor KM103, and the working state is judged by monitoring the output voltage V1 in real time through the single chip microcomputer.
3. The invention can be suitable for a radar whole machine system with larger power supply power, adopts a plurality of ground rectification power supplies to form a network to supply power for the radar system, can realize time sequence control on/off, and when a master control room issues a key on-off command, realizes that the plurality of rectification power supplies are sequentially turned on according to the control time sequence on the switch, thereby avoiding the impact on a power grid caused by overlarge power supply.
4. The invention comprises an input soft start time sequence control method and a startup and shutdown time sequence control method, wherein the input soft start time sequence control method determines the soft start time according to the output voltage, thereby improving the safety and reliability of the start; the startup and shutdown time sequence control method can achieve zero-current suction and open of the output contactor KM103, reduce the current stress of the action of the output contactor, and improve the service life and reliability of the contactor.
5. The remote control circuit comprises a second switch, wherein the second switch is connected with a bidirectional analog switch through an AND gate and used for sending a driving signal; therefore, the on-off control by two methods of machine self control and remote controller control is realized.
6. If the capacitor is arranged on the radar array surface, the size and the weight of the radar array surface are increased, and in order to ensure that the rectifying power supply works better, the capacitor is arranged on the ground, so that the effect of inhibiting voltage oscillation is also ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention.
Fig. 1 is a circuit diagram of a rectified power supply according to embodiment 1 of the present invention.
Fig. 2 is a block diagram of the present control circuit provided in embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of a novel radar power distribution system control device provided in embodiment 2 of the present invention.
Fig. 4 is a schematic diagram of an input soft start timing sequence provided in embodiment 3 of the present invention.
Fig. 5 is a schematic diagram of a soft start process provided in embodiment 3 of the present invention.
Fig. 6 is a schematic diagram of a power on/off timing sequence provided in embodiment 3 of the present invention.
Fig. 7 is a schematic flow chart of the power on/off operation provided in embodiment 3 of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Fig. 1 is a circuit diagram of a rectified power supply provided in embodiment 1 of the present invention, and as shown in fig. 1, in the embodiment of the present invention, a rectified power supply includes an input power supply, a soft start circuit, a rectification circuit, an output contactor KM103, and a control circuit, an output end of the input power supply is electrically connected to the soft start circuit, the soft start circuit is electrically connected to an input end of the rectification circuit, an output end of the rectification circuit is electrically connected to the output contactor KM103, and control signal ports of the control circuit are respectively electrically connected to control coils of a main contactor KM101, an input soft start contactor KM102, and an output contactor KM 103; the output contactor KM103 is also connected with external equipment through a capacitor (not shown in the figure); the capacitor plays a role in inhibiting voltage oscillation and can reserve proper capacity for output power.
The soft start circuit comprises an input main contactor KM101, an input soft start contactor KM102 and a resistor R1, wherein one end of the input soft start contactor KM102 is electrically connected with one end of a resistor R1, the other end of the input soft start contactor KM102 is connected with one end of the input main contactor KM101, and the other end of the input main contactor KM101 is electrically connected with a rectifying circuit; and a control signal port of the control circuit is electrically connected with control coils of the main contactor KM101 and the input soft start contactor KM102 respectively.
In order to reduce the size and the weight of a radar array surface and ensure that a rectification power supply works better, the capacitor is arranged on the ground, and the effect of inhibiting voltage oscillation is also ensured.
Preferably, the output of the input power supply is three-phase 380V power frequency alternating current.
Preferably, the rectifying circuit is an 18-pulse rectifying circuit, and the rectified power supply outputs voltage through the rectifying circuit, the output contactor KM103 and the like.
Further, the single-chip microcomputer is further included in the embodiment, the output of the single-chip microcomputer is electrically connected with the control coil of the output contactor KM103, the single-chip microcomputer is used for detecting the magnitude of the output voltage, and the single-chip microcomputer can be purchased in the market as long as the single-chip microcomputer meets the function of being capable of detecting the voltage; the single chip microcomputer is further connected with an upper computer, and the upper computer is used for sending signals to control the single chip microcomputer to work.
The control circuit has a soft start time sequence, a power on and power off time sequence and a remote control function.
Referring to fig. 2, fig. 2 is a block diagram of a present control circuit provided in embodiment 1 of the present invention; the rectification power supply comprises a local control circuit and a remote control circuit, the local control circuit and the remote control circuit are electrically connected, the local control circuit comprises a first switch, a reverse and delay unit and a bidirectional analog switch which are electrically connected in sequence, the remote control circuit comprises a second switch, and the second switch is connected with the output end of the bidirectional analog switch through an AND gate and used for sending out a driving signal, so that the on-off of the machine is controlled by the local control circuit and controlled by a remote controller; in the starting-up time sequence, the output contactor KM103 is firstly attracted, the input soft start contactor KM102 is attracted, and the main contactor KM101 is attracted and input finally; in the shutdown sequence, the output contactor KM103 is disconnected first, the input soft start contactor KM102 is disconnected, and the input main contactor KM101 is disconnected finally.
The soft start circuit is respectively connected with the input power supply and the rectifying circuit, and the soft start time can be determined according to the output voltage under the control of the soft start circuit, so that current impact at the moment of starting up is prevented from damaging devices such as a rectifying bridge and the like, and the safety and reliability of starting are improved; meanwhile, zero-current suction and opening of the output contactor KM103 can be realized, the power supply reliability of the radar assembly is improved, the current stress of the action of the output contactor is reduced, and the service life and the reliability of the contactor are improved.
In the embodiment, the capacitor is added at the output end of the rectification power supply, so that oscillation can be suppressed in the range of the input voltage of the front surface DC/DC converter, and the problem of loss and even failure caused by oscillation of the input voltage of the front surface DC/DC converter due to long-line transmission is effectively solved; meanwhile, the capacitor is added at the output end of the rectifying power supply, so that the impact current caused by the starting of the rectifying power supply is overlarge at the moment, and the voltage drop of a power grid and the damage of devices such as a rectifying bridge are caused.
Example 2
Referring to fig. 3, fig. 3 is a schematic structural diagram of a novel power distribution system control device for radar according to the present invention;
the utility model provides a novel distribution system controlling means of radar, includes a plurality of sets of rectification power, a plurality of sets of DAM subassembly (digital array module), host computer, and a plurality of sets of rectification power constitute a rectification power network deployment, rectification power network deployment and a plurality of DAM subassembly electric connection, the rectification power network deployment still with the host computer connection, set up the delay time of the switching on and shutting down of every rectification power through the host computer, send control command to singlechip, the opening in proper order of a plurality of sets of rectification power of single chip microcomputer control, the host computer is placed in total accuse indoor, simultaneously, the rectification power with three-phase 380V power frequency alternating current through 18 pulse wave rectification into direct current 520V on ground, for the DAM subassembly supplies power.
In the embodiment, the number of the rectified power supplies is preferably 26, and the number of the DAM assemblies is preferably 36.
The DAM assembly includes a 3KW centralized DC/DC power supply a, a 3KW centralized DC/DC power supply B, DAM auxiliary power supply, a number of distributed DC/DC power supplies, the 3KW centralized DC/DC power supply a and a number of distributed DC/DC power supplies, in this embodiment, the number of distributed DC/DC power supplies connected to the 3KW centralized DC/DC power supply a is preferably eight, the 3KW centralized DC/DC power supply B is connected to a plurality of distributed DC/DC power supplies, the number of the distributed DC/DC power supplies connected to the 3KW centralized DC/DC power supply B in this embodiment is also preferably eight, and each of the distributed DC/DC power supplies is connected to the DAM assembly device, meanwhile, the auxiliary power supply A of the 3KW centralized DC/DC power supply A and the auxiliary power supply B, DAM of the 3KW centralized DC/DC power supply are also connected with the DAM component equipment.
And the DAM component is connected with an external radar system to realize power supply to the external radar system.
When the master control room issues a one-key starting command, a plurality of rectification power supplies are started on the switch in sequence according to a control time sequence, so that the impact on a power grid caused by overlarge starting power is avoided; meanwhile, the soft start control method is used for preventing the current impact at the start-up moment from damaging devices such as a rectifier bridge and the like.
Embodiment 3, a new power distribution system control method for radar based on the new power distribution system control device for radar described in embodiment 2, where an upper computer issues a command to a single chip, and the single chip controls the operation of the rectification power supplies, where the control method for the operation of each rectification power supply includes an input soft start timing control method and a power on/off timing control method; the soft start time sequence control method is used for solving the problem of power failure caused by abnormal soft start, and the power on/off time sequence control method is used for solving the problem of power failure caused by abnormal power on/off, wherein,
fig. 4 is a schematic diagram of an input soft start timing sequence provided in embodiment 3 of the present invention; fig. 5 is a schematic diagram of a soft start process provided in embodiment 3 of the present invention; as shown in fig. 4-5, the soft start timing control method specifically includes the steps of:
s1, setting V1 in advance, then sending a power-on command through an upper computer, judging whether the standby state of the rectified power supply has an abnormal state by the single chip microcomputer, if the standby state of the rectified power supply has the abnormal state, not executing a power-on soft start time sequence, and if the standby state of the rectified power supply does not have the abnormal state, sequentially attracting the output contactor KM103 and the input soft start contactor KM 102;
s2, inputting waiting time t1 seconds after the soft start contactor KM102 is attracted; if the single chip microcomputer monitors that the output voltage rises to be more than V1 within the time t1, the single chip microcomputer is continuously started, and otherwise, the input soft start contactor KM102 and the output contactor KM103 are disconnected;
s3, after the output voltage rises to be more than V1, whether the output voltage is maintained to be more than V1 within the time t1 to time t2 is judged, the condition that the output voltage is equal to V1 is included above V1, if the output voltage is maintained to be more than V1 within the time t1 to time t2, the input main contactor KM101 is controlled to be attracted, the step of inputting the soft start time sequence is finished, and otherwise, the input soft start contactor KM102 and the output contactor KM103 are disconnected.
In this embodiment, the time t1, the time t2, and the time V1 are determined by specific circuit characteristics, which are determined according to actual circuit requirements; the present embodiment does not limit the time t1, the time t2, and the time V1; the soft start time is changed in an increasing way by adjusting the time t1 and t 2; ensuring the normal start of the power supply.
For describing the embodiment in more detail, when t1 is set to be 3.5s, t2 is set to be 9.5s, and V1 is set to be 400V, when the single chip receives a power-on command, the single chip judges whether the standby state of the rectified power supply is abnormal, if so, the power-on soft start timing sequence is not executed, if not, the output contactor KM103 and the input soft start contactor KM102 can be attracted, the input soft start contactor KM102 is waited for 3.5s, after 3.5s, the single chip judges whether the output voltage is greater than or equal to 400V, and if not, the input soft start contactor KM102 and the output contactor KM103 are disconnected; if the voltage is more than or equal to 400V, whether the output voltage is more than or equal to 400V can be maintained for 6s is continuously judged, if the output voltage is maintained for 6s, the contactor input main contactor KM101 is closed, otherwise, the input soft start contactor KM102 and the output contactor KM103 are opened.
Fig. 6 is a schematic diagram of a power on/off timing sequence provided in embodiment 3 of the present invention; fig. 7 is a schematic flowchart of the power on/off process provided in embodiment 3 of the present invention; as shown in fig. 6-7, the method for controlling the on/off timing specifically includes the following steps:
s21, presetting V2, attracting the output contactor KM103 when starting up, attracting the input soft start contactor KM102 by the delay time t3, wherein the power supply has output voltage which is more than or equal to V2;
s22, automatically detecting whether the working state of the rectification power supply is abnormal by the singlechip, detecting the working state of the rectification power supply and judging whether the working state is abnormal at the moment;
if an abnormal condition exists, firstly, the output contactor KM103 is disconnected, the input main contactor KM101 is disconnected within the delay time t5, the input soft start contactor KM102 is disconnected within the delay time t6, and the rectifying power supply can be shut down;
if no abnormal condition exists, delaying time t4 to pull in the main contactor KM101, and ending the starting process of the rectified power supply.
The time t3, the time t4, the time t5, the time t6 and the time V2 are determined by specific circuit characteristics, and are determined according to actual circuit requirements.
Further, the working conditions include input overvoltage, input undervoltage, input open-phase, output overcurrent, excessive output leakage current, abnormal insulation, temperature and the like.
The working principle is as follows: when the system is used specifically, the system can be used in the condition that the power supply power of the whole radar system is required to be larger, for example, when the power supply power of the whole radar system is larger than 1MW, if the ground is realized by adopting a single rectification power supply, the power is very large, and the impact of the radar on and off on a power grid is larger at the moment; therefore, a plurality of rectification power supplies are connected with the terminal equipment through leads and used for supplying power to the radar system, the rectification power supplies rectify three-phase 380V power frequency alternating current into direct current 520V high voltage on the ground through 18 pulse waves and transmit the direct current to an antenna array surface, the direct current 520V high voltage is supplied to a transmitting assembly through a DC/DC converter of the antenna array surface, and meanwhile, the startup and shutdown can be controlled in a time sequence; meanwhile, the soft start control method is used for preventing the current impact at the start-up moment from damaging devices such as a rectifier bridge and the like.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; 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 meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A novel power distribution system control method for radar is characterized in that an upper computer issues a command to a single chip microcomputer, the single chip microcomputer controls a rectification power supply to work, the rectification power supply comprises a plurality of sets of rectification power supplies, a plurality of sets of DAM assemblies and the upper computer, the plurality of sets of rectification power supplies form a rectification power supply network used for supplying power to a radar system, the power supply network is electrically connected with the DAM assemblies, and the power supply network is also electrically connected with the upper computer;
the DAM component comprises a 3KW centralized DC/DC power supply A, a 3KW centralized DC/DC power supply B, DAM auxiliary power supply and a plurality of distributed DC/DC power supplies, wherein the 3KW centralized DC/DC power supply A is connected with the plurality of distributed DC/DC power supplies, the 3KW centralized DC/DC power supply B is connected with the plurality of distributed DC/DC power supplies, each distributed DC/DC power supply is connected with DAM component equipment, meanwhile, the 3KW centralized DC/DC power supply A and the 3KW centralized DC/DC power supply B, DAM auxiliary power supplies are also connected with the DAM component equipment, and the DAM component is connected with an external radar system;
the rectification power supply comprises an input power supply, a soft start circuit, a rectification circuit, an output contactor KM103 and a control circuit, wherein the output end of the input power supply is electrically connected with the soft start circuit, the soft start circuit is electrically connected with the input end of the rectification circuit, the output end of the rectification circuit is electrically connected with the output contactor KM103, one end of the control circuit is electrically connected with the soft start circuit, the other end of the control circuit is electrically connected with the output contactor KM103, the output contactor KM103 is further connected with external equipment through a capacitor, and the capacitor is arranged on the ground;
the soft start circuit comprises an input main contactor KM101, an input soft start contactor KM102 and a resistor R1, wherein one end of the input soft start contactor KM102 is electrically connected with one end of a resistor R1, the other end of the input soft start contactor KM102 is connected with one end of the input main contactor KM101, and the other end of the input main contactor KM101 is electrically connected with a rectifying circuit;
the single chip microcomputer is electrically connected with a control coil of the output contactor KM103, the input end of the output contactor KM103 is electrically connected with one end of a control circuit, and the single chip microcomputer is further connected with an upper computer;
the control strategy of the work of each rectification power supply comprises an input soft start time sequence control strategy, and the steps are as follows;
s1, setting V1 in advance, then sending a power-on command through an upper computer, judging whether the standby state of the rectified power supply has an abnormal state by the single chip microcomputer, if the standby state of the rectified power supply has the abnormal state, not executing a power-on soft start time sequence, and if the standby state of the rectified power supply does not have the abnormal state, sequentially attracting the output contactor KM103 and the input soft start contactor KM 102;
s2, inputting waiting time t1 seconds after the soft start contactor KM102 is attracted; if the single chip microcomputer monitors that the output voltage rises to be more than V1 within the time t1, the single chip microcomputer is continuously started, and otherwise, the input soft start contactor KM102 and the output contactor KM103 are disconnected;
s3, after the output voltage rises to be more than V1, whether the output voltage is maintained to be more than V1 within the time t1 to time t2 is judged, the condition that the output voltage is equal to V1 is included above V1, if the output voltage is maintained to be more than V1 within the time t1 to time t2, the input main contactor KM101 is controlled to be attracted, the step of inputting the soft start time sequence is finished, and otherwise, the input soft start contactor KM102 and the output contactor KM103 are disconnected.
2. The method for controlling the novel radar power distribution system according to claim 1, wherein the method for controlling the operation of each rectified power supply comprises a method for controlling the on-off sequence, and comprises the following steps:
s21, presetting V2, attracting the output contactor KM103 when starting up, attracting the input soft start contactor KM102 by the delay time t3, wherein the power supply has output voltage which is more than or equal to V2;
s22, automatically detecting whether the working state of the rectification power supply is abnormal by the singlechip, detecting the working state of the rectification power supply and judging whether the working state is abnormal at the moment;
if an abnormal condition exists, firstly, the output contactor KM103 is disconnected, the input soft start contactor KM102 is disconnected within the delay time t5, the input main contactor KM101 is disconnected within the delay time t6, and the rectifying power supply can be shut down;
if no abnormal condition exists, delaying time t4 to pull in the main contactor KM101, and ending the starting process of the rectified power supply.
3. The method of claim 2, wherein the operating conditions include input over-voltage, input under-voltage, input open-phase, output over-current, output leakage current, insulation anomaly, and temperature conditions.
4. The method for controlling the novel power distribution system of the radar as recited in claim 1, wherein the rectifier circuit is an 18-pulse rectifier circuit.
5. The method for controlling the novel radar power distribution system according to claim 1, wherein the output of the input power supply is three-phase 380V power frequency alternating current.
6. The method as claimed in claim 1, wherein the rectified power further comprises a local control circuit and a remote control circuit, the local control circuit and the remote control circuit are electrically connected, the local control circuit comprises a first switch, a reverse and delay unit and a bidirectional analog switch which are electrically connected in sequence, the remote control circuit comprises a second switch, and the second switch is connected with an output end of the bidirectional analog switch through an and gate.
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Inventor after: Chen Xinping Inventor after: Sheng Jingtai Inventor after: Sha Xiang Inventor after: Li Shanqing Inventor before: Chen Xinping Inventor before: Sheng Jingtai Inventor before: Sha Xiang Inventor before: Li Shanqing |