CN107026501B - A kind of power supply system and its control method that failure is predicted and switched - Google Patents

Abstract

The present invention relates to a power supply system with fault prediction and switching and a control method thereof. The system comprises: multiple sets of power supply groups, each group is provided with a plurality of power supply sources, and each group of power supply groups corresponds to a power supply requirement of electrical equipment respectively. ; The detection unit, the power supply is equipped with a detection unit to detect the actual operating parameters of the power supply and the predicted operating parameters of the electrical equipment; the control unit has a built-in storage module, stores the normal operating parameters of the power supply and the normal operating parameters of the electrical equipment, and detects the connection of the control unit Unit, the detection unit sends the detection data to the control unit and compares it with the normal operating parameters in the storage module, predicts the failure of the power supply system in advance, and issues a switching command; the power switching unit is connected to the control unit, and will switch accordingly The current power supply is disconnected and a new power supply is switched. Compared with the prior art, the invention can predict the failure of the power supply system in advance and respond in time to ensure the smooth operation of the system.

Description

A power supply system with fault prediction and switching and its control method

technical field

The invention relates to a power supply system and a control method thereof, in particular to a power supply system with fault prediction and switching and a control method thereof.

Background technique

The on-board power supply system is an essential part of the on-board power supply network of high-speed maglev trains. The on-board power supply network of maglev trains is usually equipped with several different types of power supplies, which correspond to different power supply requirements, such as direct power supply on-board, high-speed operation power supply, or on-board battery power supply. Once a power supply fails, the on-board electrical equipment cannot operate normally, and it is necessary to switch to a new power supply urgently, such as switching to the on-board battery for power supply. This switching of the power supply system will have a great impact on the normal operation of the maglev train. , will directly lead to the emergency braking of the train running at high speed. The power supply switching of the existing maglev train on-board power supply system is based on the fact that the power supply has already failed. In the case of a system failure, an available backup power supply system is automatically provided, which will inevitably lead to an emergency brake stop state of the maglev train, thereby reducing operating efficiency and operating safety.

Contents of the invention

The object of the present invention is to provide a power supply system and control method for fault prediction and switching of on-board electrical equipment of high-speed maglev trains in order to overcome the above-mentioned defects in the prior art.

The purpose of the present invention can be achieved through the following technical solutions:

A power supply system with fault prediction and switching, comprising:

Power supply group, set multiple groups, each group is set with multiple power supplies, and each group of power supply groups has a power supply requirement for the application electrical equipment;

Detection unit, each power supply is equipped with a detection unit to detect the actual operating parameters of the power supply and the predicted operating parameters of the electrical equipment;

The control unit has a built-in storage module, the storage module respectively stores the normal operation parameters of the power supply and the normal operation parameters of the electrical equipment, the control unit is connected to the detection unit, and the detection unit sends the detection data to the control unit and communicates with the storage The corresponding normal operating parameters in the module are compared to predict the failure of the power supply system in advance and issue a switching command;

The power switching unit is connected to the control unit, disconnects the corresponding power supply and switches a new power supply after receiving the switching command.

The detection unit includes an electronic load and a data detector for simulating the working state of the electrical equipment, the electronic load is connected to the corresponding power supply, and the data detector is connected to the electronic load and the control unit.

The system also includes a human-computer interaction unit connected to the control unit, and the human-computer interaction unit obtains the normal operation parameters of the power supply and the normal operation parameters of the electrical equipment and sends them to the storage module.

The normal operation parameters of the power supply include the rated input voltage U _i of the power supply, the rated output voltage U _o of the power supply, the rated input current I _i of the power supply and the rated output current I _o of the power supply. Correspondingly, the actual operating parameters of the power supply include the actual input voltage u _i of the power supply, The actual output voltage u _o of the power supply, the actual input current i _i of the power supply and the actual output current i _o of the power supply.

The normal operating parameters of the electrical equipment include the rated input voltage U _ai of the electrical equipment, the rated output voltage U _ao of the electrical equipment, the rated input current I _ai of the electrical equipment, and the rated output current I _ao of the electrical equipment. The predictive operation parameters of the electrical equipment include the input voltage u _ai of the electrical equipment predictive operation, the output voltage u _ao of the electrical equipment predictive operation, the input current i _ai of the electrical equipment predictive operation and the output current i _ao of the electrical equipment predictive operation.

A control method for a power supply system with fault prediction and switching, the method comprising the following steps:

(1) The control unit obtains the normal operation parameters of the power supply and the normal operation parameters of the electrical equipment of each power supply in the power supply group, and stores them in the storage module in the control unit;

(2) select any power supply in each group of power supply groups respectively, and the control unit controls the power supply to start;

(3) The detection unit simulates the working state of the electrical equipment (5), detects the actual operating parameters of the power supply and the predicted operating parameters of the electrical equipment, and sends the detection data to the control unit (3);

(4) The control unit compares the actual operating parameters of the detected power supply and the predicted operating parameters of the electrical equipment with the corresponding normal operating parameters of the power supply and the normal operating parameters of the electrical equipment in the storage module, and when the set threshold is exceeded, step (5) is performed ), determine that the corresponding power supply is a faulty power supply, otherwise connect the power supply to the electrical equipment for power supply;

(5) Turn off the faulty power supply, select another power supply in the power supply group where the faulty power supply is located, start the power supply and return to step (3).

Compared with prior art, the present invention has following advantage:

(1) In this invention, the power supply for the different power supply requirements of the application electrical equipment is set in the form of a power supply group, forming a form of backup switching. When a certain power supply fails, a replacement power supply can be provided in time to prevent the electrical equipment from Can not work normally;

(2) The electronic load in the detection unit of the present invention can simulate the operating state of the electrical equipment, so the failure of the power supply system can be predicted in advance, and a switching action can be made in time to ensure the smooth operation of the electrical equipment;

(3) The human-computer interaction unit provided can set the normal operation parameters of the power supply and the normal operation parameters of the electrical equipment according to the needs, which is convenient and practical.

Description of drawings

Fig. 1 is the general structural block diagram of the power supply system of the present invention fault prediction and switching;

Fig. 2 is a structural block diagram of a partial power supply system composed of a group of power supply sources in the power supply system with fault prediction and switching of the present invention;

FIG. 3 is a flow chart of the control method of the power supply system of the present invention.

In the figure, 1 is the power supply group, 2 is the detection unit group, 3 is the control unit, 4 is the power switching unit, 5 is the electrical equipment, 6 is the human-computer interaction unit, 11 is the power supply, 21 is the electronic load, 22 is the data detector.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

As shown in Fig. 1 and Fig. 2, a power supply system with fault prediction and switching includes: power supply group 1, and multiple groups are set. In this embodiment, power supply group 1 is set in n groups, and each group of power supply group 1 is respectively For a power supply requirement of the electrical equipment 5, a plurality of power supply sources 11 are arranged in each group of power supply groups 1, and in this embodiment, one group of power supply groups 1 is provided with p power supply sources 11, as shown in FIG. 2; Including a detection unit, each power supply 11 is equipped with a detection unit to detect the actual operating parameters of the power supply and the predicted operating parameters of the electrical equipment, and the detection units configured by the power supply 11 in each power supply group 1 form the detection unit group 2; The system also includes a control unit 3 with a built-in storage module. The storage module stores the normal operation parameters of the power supply and the normal operation parameters of the electrical equipment respectively. The control unit 3 is respectively connected to the detection unit, and the detection unit will detect the data Send it to the control unit 3 and compare it with the corresponding normal operating parameters in the storage module, predict the failure of the power supply system in advance, and issue a switching command; in addition, it also includes a power switching unit 4, connected to the control unit 3, when receiving the switching After the command, the corresponding power supply 11 is disconnected and a new power supply 11 is switched. Wherein said detection unit comprises electronic load 21 and data detector 22 for simulating the working state of electrical equipment 5, described electronic load 21 is respectively connected with corresponding power supply 11, and described data detector 22 is connected with electronic load 21 and the control unit 3, the electronic load 21 in each group of power supply groups 1 is different, that is, when the power supply group 1 provides a power supply demand of the electric device 5, the working state of the power supply device 5 is determined by the electronic load For the p power supply sources 11 in the same power supply group 1, the electronic loads 21 are all the same, and these electronic loads 21 are all pre-configured.

In addition, the system also includes a human-computer interaction unit 6, which is connected to the control unit 3, and the human-computer interaction unit 6 obtains the normal operation parameters of the power supply and the normal operation parameters of the electrical equipment and sends them to the storage module.

The normal operation parameters of the power supply include the rated input voltage U _i of the power supply, the rated output voltage U _o of the power supply, the rated input current I _i of the power supply and the rated output current I _o of the power supply. Correspondingly, the actual operating parameters of the power supply include the actual input voltage u _i of the power supply, The actual output voltage u _o of the power supply, the actual input current i _i of the power supply and the actual output current i _o of the power supply, the normal operation parameters of the power supply and the actual operation parameters of the power supply in the present invention are not limited to the above-mentioned ones, and can be selected according to the actual situation, not only can Select the current and voltage outside the power supply 11 as the normal operating parameters, and obtain the actual operating parameters through detection. You can also select the voltage and current of the internal modules of the power supply as normal operating parameters, and obtain the actual operating parameters through detection. For example, you can choose The adjustment voltage U _t of the adjustment module inside the power supply 11, the feedback voltage U _f of the feedback module inside the power supply 11, and the corresponding adjustment current I _ad and feedback current I _f are used as the normal operation parameters of the power supply, and are detected by the detection unit The actual adjustment voltage u _ad of the adjustment module, the actual feedback voltage u _f of the feedback module, the actual adjustment current _{i ad} and the actual feedback current if are used as the actual operating parameters of the power supply.

The normal operating parameters of the electrical equipment include the rated input voltage U _ai of the electrical equipment, the rated output voltage U _ao of the electrical equipment, the rated input current I _ai of the electrical equipment, and the rated output current I _ao of the electrical equipment. The predictive operation parameters of the electric equipment include the input voltage u _ai of the predictive operation of the electric equipment, the output voltage u _ao of the predictive operation of the electric equipment, the input current i _ai of the predictive operation of the electric equipment and the output current i _ao of the predictive operation of the electric equipment, here the predictive operation of the electric equipment The operating input voltage _{u ai} is obtained by measuring the voltage at the input terminal of the electronic load 21 after the electronic load 21 of the detection unit is connected to the power supply. Finally, the voltage at the output terminal of the electronic load 21 is measured, and the input current i _ai of the predicted operation of the electric device and the output current i _ao of the predicted operation of the electric device are obtained by measuring the voltage at the input terminal and the output terminal of the electronic load 21 at the input and output terminals respectively The actual current is obtained. Since the electronic load 21 can simulate the state of the electrical equipment 5, the corresponding parameter value of the electronic load 21 can be detected to obtain the predicted operating parameter value of the electrical equipment, thereby achieving the purpose of predicting in advance.

As shown in FIG. 3, a control method of a power supply system with fault prediction and switching is shown, and the method includes the following steps:

Execute step 101, the control unit 3 obtains the normal operation parameters of the power supply and the normal operation parameters of the electrical equipment of each power supply 11 in the power supply group 1, and stores them in the storage module in the control unit 3;

Execute step 102, respectively select any power supply 11 in each power supply group 1, and the control unit 3 controls the power supply 11 to start;

Execute step 103, the detection unit simulates the working state of the electrical equipment 5, detects the actual operating parameters of the power supply and the predicted operating parameters of the electrical equipment, and sends the detection data to the control unit 3;

Execute step 104, the control unit 3 compares the detected actual operating parameters of the power supply and the predicted operating parameters of the electrical equipment with the corresponding normal operating parameters of the power supply and the normal operating parameters of the electrical equipment in the storage module;

Execute step 105, when the difference between the actual operating parameters of the power supply and the predicted operating parameters of the electrical equipment and the corresponding normal operating parameters of the power supply and the normal operating parameters of the electrical equipment in the storage module exceeds the set threshold, it is determined that the corresponding power supply 11 is a faulty power supply , go to step 107, otherwise go to step 106;

Step 106, connecting the power supply 11 to the electrical device 5 for power supply;

Step 107 , turn off the faulty power supply, select another power supply 11 in the power supply group 1 where the faulty power supply is located, start the power supply 11 and return to step 103 .

Claims (5)

1. the power supply system that a kind of failure is predicted and switched characterized by comprising

Power supply group (1), is arranged multiple groups, every group of multiple power supply of setting (11), and every group of power supply group (1) respectively corresponds A kind of power demands of electrical equipment (5)；

Detection unit, a detection unit progress power supply actual operation parameters are respectively configured in each power supply (11) and electricity consumption is set The detection of standby precognition operating parameter, specifically: the detection unit includes the electricity for simulating electrical equipment (5) working condition Son load (21) and data detector (22), the electronic load (21) connect corresponding power supply (11), the number According to detector (22) connection electronic load (21) and control unit (3), data detector (22) detects power supply actual operation parameters With electronic load parameter, detection unit is predicted to obtain electrical equipment precognition operating parameter by electronic load parameter；

Control unit (3), built-in memory module, the memory module store power supply normal operational parameters and electrical equipment respectively Normal operational parameters, the control unit (3) connecting detection unit, the detection unit by power supply actual operation parameters and Electrical equipment precognition operating parameter is sent to control unit (3) and carries out pair with the corresponding normal operational parameters in memory module Than predicting power supply system failure in advance, and issue switching command；

Power supply switch unit (4) connects the control unit (3), by corresponding power supply after receiving switching command (11) it disconnects and switches new power supply (11).

2. the power supply system that a kind of failure according to claim 1 is predicted and switched, which is characterized in that the system further includes Man-machine interaction unit (6), the man-machine interaction unit (6) connect control unit (3), and man-machine interaction unit (6) obtains power supply Normal operational parameters and electrical equipment normal operational parameters are simultaneously sent to the memory module.

3. the power supply system that a kind of failure according to claim 1 is predicted and switched, which is characterized in that the power supply is just Normal operating parameter includes source nominal input voltage U_i, source nominal output voltage U_o, source nominal input current I_iWith power supply volume Surely electric current I is exported_o, correspondingly power supply actual operation parameters include that power supply actually enters voltage u_i, power supply actual output voltage u_o、 Power supply actually enters electric current i_iWith power supply actual output current i_o。

4. the power supply system that a kind of failure according to claim 1 is predicted and switched, which is characterized in that the electricity consumption is set Standby normal operational parameters include electrical equipment nominal input voltage U_ai, electrical equipment rated output voltage U_ao, electrical equipment it is specified Input current I_aiWith electrical equipment output-current rating I_ao, correspondingly electrical equipment precognition operating parameter includes that electrical equipment is pre- Know operation input voltage u_ai, electrical equipment predict operating voltage output u_ao, electrical equipment precognition operation input current i_aiAnd electricity consumption Equipment precognition operation output electric current i_ao。

5. the control method of power supply system that a kind of failure as described in claim 1 is predicted and switched, which is characterized in that the party Method includes the following steps:

(1) control unit (3) obtains the power supply normal operational parameters and use of each power supply (11) in power supply group (1) Electric equipment normal operational parameters, and the memory module stored into control unit (3)；

(2) any one power supply (11) in every group of power supply group (1) is chosen respectively, and control unit (3) controls the power supply Power supply (11) starting；

(3) working condition of the electronic load in detection unit (21) simulation electrical equipment (5), data detector (22) carry out electricity The detection of source actual operation parameters and electronic load parameter, detection unit are predicted to obtain electrical equipment pre- by electronic load parameter Know operating parameter, and power supply actual operation parameters and electrical equipment precognition operating parameter are sent to control unit (3)；

(4) in power supply actual operation parameters and electrical equipment the precognition operating parameter and memory module that control unit (3) will test Corresponding power supply normal operational parameters and electrical equipment normal operational parameters compare, and when being more than given threshold, execute step Suddenly (5) determine that corresponding power supply (11) are trouble power, otherwise by the plant-grid connection electrical equipment (5)；

(5) trouble power is closed, and chooses other power supplies (11) in trouble power place power supply group (1), Start the power supply (11) and return step (3).