CN215733432U - Current sensor detection and control system for energy storage converter - Google Patents
Current sensor detection and control system for energy storage converter Download PDFInfo
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- CN215733432U CN215733432U CN202121359998.6U CN202121359998U CN215733432U CN 215733432 U CN215733432 U CN 215733432U CN 202121359998 U CN202121359998 U CN 202121359998U CN 215733432 U CN215733432 U CN 215733432U
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Abstract
The utility model provides a current sensor detection and control system for an energy storage converter, which comprises a current detection subsystem, a control subsystem and a power supply subsystem for supplying power to the current detection subsystem and the control subsystem; the control subsystem comprises an ICP controller, a processor for receiving data of the ICP controller and an actuator for controlling the on-off of the circuit, and the actuator and the processor are connected with the ICP controller. The utility model aims to detect the current of the alternating current network side current and the direct current of the inverter based on the energy storage converter, and facilitate the subsequent calculation of information such as product efficiency and the like through the data processing unit; meanwhile, by monitoring and recording relevant current values in real time, when the current is abnormal, the detection and control system can also cut off a switch of the alternating current circuit breaker on the grid side through the ICP controller, so that the connection between the energy storage converter and the power grid is disconnected, and the damage of the energy storage converter caused by the abnormal current is avoided.
Description
Technical Field
The utility model belongs to the technical field of energy storage system detection, and particularly relates to a current sensor detection and control system for an energy storage converter.
Background
With the development of the energy storage industry, the performance of the energy storage converter plays a key role; the current sensor can be used for detecting the current of the energy storage system, and powerful data support can be provided for power test and efficiency test; meanwhile, in order to ensure the normal operation of the equipment, the relevant current detection is required to be carried out on each key electrical system, so that the damage to the product caused by abnormal current is avoided; however, the existing current detection system has a complex structure and poor reliability, and cannot detect and record relevant current values in real time; in addition, the existing detection system can only realize the rough detection of the current of the power grid, the detection effect is poor, the control on the on-off of the energy storage converter and the power grid cannot be realized in time, the energy storage converter cannot be protected, and the energy storage converter is easily damaged due to abnormal current.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention is directed to a current sensor detection and control system for an energy storage converter, so as to solve the problem that the current detection system cannot effectively protect the energy storage converter.
In order to achieve the purpose, the technical scheme of the utility model is realized as follows:
a current sensor detection and control system for an energy storage converter comprises a current detection subsystem, a control subsystem and a power supply subsystem for supplying power to the current detection subsystem and the control subsystem;
the control subsystem comprises an ICP controller, a processor for receiving data of the ICP controller and an actuator for controlling the on-off of a circuit, and the actuator and the processor are connected with the ICP controller;
the current detection subsystem comprises a network side current detection unit and a storage battery side current detection unit, the network side current detection unit comprises a filter capacitor current detector and an alternating current detector, and the storage battery side current detection unit comprises a direct current detector; the detection end of the filter capacitor current detector is arranged corresponding to the position between the network side filter capacitor and the three-phase incoming line of the power grid, and the output end of the filter capacitor current detector is connected with the ICP controller; the detection end of the alternating current detector is arranged corresponding to the three-phase incoming line of the energy storage converter inversion module, and the output end of the alternating current detector is connected with the ICP controller; the detection end of the direct current detector is arranged corresponding to a direct current outlet of the energy storage converter inversion module, and the output end of the direct current detector is connected with the ICP controller.
Furthermore, the actuator comprises a grid-side circuit breaker for controlling the on-off of the energy storage converter and a grid connection circuit; and the network side breaker is connected with the ICP controller.
Furthermore, the three-phase incoming line of the power grid comprises an A-phase line, a B-phase line and a C-phase line, and the filter capacitor current detector comprises an A-phase line filter capacitor current sensor for detecting the current of the A-phase line and a C-phase line filter capacitor current sensor for detecting the current of the C-phase line; and the output ends of the A-phase line filter capacitor current sensor and the C-phase line filter capacitor current sensor are connected with the ICP controller.
Further, the alternating current detector comprises an a-phase line alternating current sensor for detecting a-phase line current, a B-phase line alternating current sensor for detecting a B-phase line current, and a C-phase line alternating current sensor for detecting a C-phase line current; and the output ends of the A-phase line alternating current sensor, the B-phase line alternating current sensor and the C-phase line alternating current sensor are connected with the ICP controller.
Furthermore, the power supply subsystem comprises a first direct current switch power supply and a second direct current switch power supply, the first direct current switch power supply is connected with the second direct current switch power supply in series, the input end of the first direct current switch power supply is connected with a power grid, and the output end of the first direct current switch power supply is connected with the input end of the second direct current switch power supply; and the power supply ends of the ICP controller, the filter capacitor current detector, the alternating current detector and the direct current detector are all connected with the output end of the second direct current switching power supply.
Compared with the prior art, the current sensor detection and control system for the energy storage converter has the following advantages:
the utility model aims to detect the current of the network side alternating current and the inverter direct current based on the energy storage converter, and facilitate the subsequent calculation of information such as product efficiency through the data processing unit; meanwhile, by monitoring and recording relevant current values in real time, when the current is abnormal, the detection and control system can also cut off a switch of the alternating current circuit breaker on the grid side through the ICP controller, so that the connection between the energy storage converter and the power grid is disconnected, the damage of the energy storage converter caused by the abnormal current is avoided, and the safety of the energy storage converter in the using process is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:
fig. 1 is a block diagram of a current sensor detection and control system for an energy storage converter according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the electrical connection of the current detection subsystem in the current sensor detection and control system for the energy storage converter according to the embodiment of the present invention;
FIG. 3 is a schematic diagram of a circuit connection of a filter capacitor current detector in a current sensor detection and control system for an energy storage converter according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a circuit connection of an AC current detector in the current sensor detection and control system for the energy storage converter according to the embodiment of the present invention;
FIG. 5 is a schematic diagram of a circuit connection of a DC current detector in a current sensor detection and control system for an energy storage converter according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of the electrical connections of the power supply subsystem in the current sensor detection and control system for the energy storage converter according to the embodiment of the present invention;
fig. 7 is an expanded view of an ICP controller in a current sensor detection and control system for an energy storage converter according to an embodiment of the present invention.
Description of reference numerals:
1. a filter capacitor current detector; 2. an alternating current detector; 3. a direct current detector.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either 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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A current sensor detection and control system for an energy storage converter, as shown in fig. 1 to 7, comprises a current detection subsystem, a control subsystem, and a power supply subsystem for supplying power to both the current detection subsystem and the control subsystem;
the control subsystem comprises an ICP controller, a processor for receiving data of the ICP controller and an actuator for controlling the on-off of a circuit, and the actuator and the processor are connected with the ICP controller;
optionally, the ICP controller may adopt an existing current detection controller cooperating with the current sensor to collect and process the detection data of the current sensor, and the ICP controller may perform relevant processing of the current data according to the current signal condition by a programmable processor inside the ICP controller to realize control of the actuator; the processor can adopt a PC computer, the PC computer can be connected with the ICP controller through the data transmission module to realize data transmission, and the PC computer can be used for storing and displaying detection data, so that the data can be conveniently recorded and observed, and the subsequent complex processing of the detection data is facilitated.
The current detection subsystem comprises a network side current detection unit and a storage battery side current detection unit, the network side current detection unit comprises a filter capacitor current detector 1 and an alternating current detector 2, and the storage battery side current detection unit comprises a direct current detector 3; the detection end of the filter capacitor current detector 1 is arranged corresponding to the position between the filter capacitor at the network side and the three-phase incoming line of the power grid, and the output end of the filter capacitor current detector is connected with the ICP controller; the detection end of the alternating current detector 2 is arranged corresponding to the three-phase incoming line of the energy storage converter inversion module, and the output end of the alternating current detector is connected with the ICP controller; the detection end of the direct current detector 3 is arranged corresponding to a direct current outlet of the energy storage converter inversion module, and the output end of the direct current detector is connected with the ICP controller.
The detection and control system can realize three-side current detection, wherein the three-side current detection is respectively network side alternating current detection, storage battery direct current detection and filter capacitor current detection; the first two current detections are mainly used for detecting the rectification and inversion working states of the energy storage converter, and the detection and control system can effectively test and record related operation data; the filter capacitor is used as a key system of a main loop of the energy storage converter, a part of electric energy can be separated in the filtering process, the current detection of the filter capacitor has the functions of detecting the working state of the loop, feeding back to the ICP controller to execute relevant operations when current is abnormal, and calculating the power loss in the subsequent operation process.
Optionally, the grid-side current detection unit may also be configured to detect a total current at the grid side, the total current data at the grid side includes two parts, namely a grid-side filter capacitor current and an inverter module alternating current, and the data may be subsequently used for power and efficiency numerical calculation.
The actuator comprises a grid-side circuit breaker for controlling the on-off of the energy storage converter and a power grid connecting circuit; and the network side breaker is connected with the ICP controller. The grid-side circuit breaker is used as a connecting switch of a power grid and the energy storage converter, and can effectively and quickly break the connection of the two systems when abnormality occurs, so that the energy storage converter or power grid-side equipment is prevented from being damaged.
The three-phase incoming line of the power grid comprises an A-phase line, a B-phase line and a C-phase line, and the filter capacitor current detector 1 comprises an A-phase line filter capacitor current sensor for detecting the current of the A-phase line and a C-phase line filter capacitor current sensor for detecting the current of the C-phase line; and the output ends of the A-phase line filter capacitor current sensor and the C-phase line filter capacitor current sensor are connected with the ICP controller.
Optionally, as shown in fig. 3, 2CT3 is an a-phase line filter capacitor current sensor; 2CT3.1 is a C-phase line filter capacitor current sensor, and both can adopt a current sensor with the model of NACF.100C-S5/V; 2C3 and 2C3.1 are both net side filter capacitors and are used for filtering net side higher harmonics. The positive and negative power supply end interfaces of each current sensor are powered by a +/-15 VDC power supply, and the M and G interfaces are used for data output and are connected with the ICP controller for data transmission and conversion.
The alternating current detector 2 comprises an A-phase line alternating current sensor for detecting A-phase line current, a B-phase line alternating current sensor for detecting B-phase line current and a C-phase line alternating current sensor for detecting C-phase line current; and the output ends of the A-phase line alternating current sensor, the B-phase line alternating current sensor and the C-phase line alternating current sensor are connected with the ICP controller.
Optionally, as shown in fig. 4, where 3CT3 is an a-phase line ac current sensor, 3CT3.1 is a B-phase line ac current sensor, and 3CT3.2 is a C-phase line ac current sensor, both of them may adopt a current sensor with a model of nacf.1200j-S5/V, and the ac current detector may be configured to detect a current magnitude of a power module grid-side incoming line; the positive and negative power supply end interfaces of each current sensor are powered by a +/-15 VDC power supply, and the M and G interfaces are used for data output and are connected with the ICP controller for data transmission and conversion.
Alternatively, the DC current detector 3 may also adopt a current sensor with model number NACF.1500J-S5/V; the detection position of the direct current detector 3 is a direct current outlet of an inversion module of the energy storage converter, and the detection position is a connection position of an output end of a power module of the energy storage converter and a direct current power storage system; the positive and negative power supply end interfaces of the current sensor are powered by a +/-15 VDC power supply, and the M and G interfaces are used for data output and are connected with the ICP controller for data transmission and conversion. The direct current detector can also be used for detecting the working current connected with the energy storage system in the rectification and inversion processes and can be used for subsequent energy loss calculation.
The ICP controller may be a CPU controller, for example, of the type: 6ES7155-6AU01-0CN0 to realize the processing of current detection data and the control of an actuator. The ICP controller can be connected with each current sensor through a current detection module to realize data acquisition and processing; the current detection module can be a detection module with the model number of 3UF7112-1AA 00-0; the skilled person can also select a suitable ICP controller as required to implement the collection processing of the current detection data and the control of the actuator, and the main innovation of the present invention lies in the design of the overall structure of the control system, and does not involve the structural improvement of the specific current detector and the ICP controller, and therefore, the detailed description thereof is omitted here.
The power supply subsystem comprises a first direct-current switching power supply and a second direct-current switching power supply, the first direct-current switching power supply is connected with the second direct-current switching power supply in series, the input end of the first direct-current switching power supply is connected with a power grid, and the output end of the first direct-current switching power supply is connected with the input end of the second direct-current switching power supply; and the power supply ends of the ICP controller, the filter capacitor current detector, the alternating current detector and the direct current detector are all connected with the output end of the second direct current switching power supply.
Alternatively, as shown in fig. 6, 20PW1 is a dc switching power supply, which converts 850VDC of the power storage system into 24VDC, and then converts the original 24VDC power into ± 15V power through a 20PW2 ± 15V switching power supply, and 20F4 is a micro circuit breaker for controlling and protecting a ± 15VDC power supply terminal row: x6, X7.
By designing two switching power supplies to supply power, the redundant design of a power supply subsystem is realized, and the power supply subsystem has the following advantages: firstly, when in-plant testing is carried out and an energy storage system is not provided, the control system can be supplied with power through in-plant alternating current, the problems that the direct current energy storage system cannot run and debug and the like in the plant are avoided, and the universality of the detection and control system is improved; in the field operation process, for example, after the network side is powered off, in order to ensure the normal operation of the control system or the recording and data storage of the controller, the power supply subsystem can be switched to the direct-current switching power supply, and the reliability and the applicability of the detection and control system are improved because the power supply subsystem directly takes power from the rear-end energy storage system (the storage battery has power for a long time); as shown in FIG. 6, the 24VDC power supply can be directly connected with the storage battery, and the 24VDC power supply is converted into a +/-15V power supply to realize power supply.
In an alternative embodiment, at least two of the filter capacitor current detector 1, the alternating current detector 2 and the direct current detector 3 are provided. Through setting up a plurality of current detector, can make this kind of current detection and control system reserve partial detection return circuit, if higher level energy storage system does not possess current detection system, the accessible this system reserves the position and carries out current detection and feeds back relevant data, is favorable to improving this kind of current detection and control system's suitability.
The workflow of such a detection and control system is illustrated below:
when the detection and control system normally operates, the filter capacitor current detector, the alternating current detector and the direct current detector carry out current monitoring on each detection point, and feed current signals back to the ICP controller in real time, the ICP controller carries out data processing on the current signals, and then transmits the processed data to the processor for subsequent storage or display; the processor can carry out subsequent processing on the current data of each loop, and can also be connected with display equipment to display the parameter information such as the current, the power, the efficiency of the whole machine and the like of each loop, so that an operator can conveniently check the parameter information;
when the ICP controller detects that a current signal of a certain current detector is abnormal, namely the current value of the current detector is in an abnormal current value range, the ICP controller can control the grid-side circuit breaker to disconnect the energy storage converter from the power grid, damage to the energy storage converter due to abnormal current is avoided, and the safety of the energy storage converter in the using process is improved.
The utility model aims to detect the current of the network side alternating current and the inverter direct current based on the energy storage converter, and facilitate the subsequent calculation of information such as product efficiency through the data processing unit; meanwhile, by monitoring and recording relevant current values in real time, when the current is abnormal, the detection and control system can also cut off a switch of the alternating current circuit breaker on the grid side through the ICP controller, so that the connection between the energy storage converter and the power grid is disconnected, the damage of the energy storage converter caused by the abnormal current is avoided, and the safety of the energy storage converter in the using process is improved.
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 utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The utility model provides a current sensor detects and control system for energy storage converter which characterized in that: the system comprises a current detection subsystem, a control subsystem and a power supply subsystem for supplying power to the current detection subsystem and the control subsystem;
the control subsystem comprises an ICP controller, a processor for receiving data of the ICP controller and an actuator for controlling the on-off of a circuit, and the actuator and the processor are connected with the ICP controller;
the current detection subsystem comprises a network side current detection unit and a storage battery side current detection unit, the network side current detection unit comprises a filter capacitor current detector and an alternating current detector, and the storage battery side current detection unit comprises a direct current detector; the detection end of the filter capacitor current detector is arranged corresponding to the position between the network side filter capacitor and the three-phase incoming line of the power grid, and the output end of the filter capacitor current detector is connected with the ICP controller; the detection end of the alternating current detector is arranged corresponding to the three-phase incoming line of the energy storage converter inversion module, and the output end of the alternating current detector is connected with the ICP controller; the detection end of the direct current detector is arranged corresponding to a direct current outlet of the energy storage converter inversion module, and the output end of the direct current detector is connected with the ICP controller.
2. A current sensor sensing and control system for an energy storage converter as claimed in claim 1 wherein: the actuator comprises a grid-side circuit breaker for controlling the on-off of the energy storage converter and a power grid connecting circuit; and the network side breaker is connected with the ICP controller.
3. A current sensor sensing and control system for an energy storage converter as claimed in claim 1 wherein: the filter capacitor current detector comprises an A-phase line filter capacitor current sensor for detecting the current of the A-phase line and a C-phase line filter capacitor current sensor for detecting the current of the C-phase line; and the output ends of the A-phase line filter capacitor current sensor and the C-phase line filter capacitor current sensor are connected with the ICP controller.
4. A current sensor sensing and control system for an energy storage converter as claimed in claim 3 wherein: the alternating current detector comprises an A-phase line alternating current sensor for detecting A-phase line current, a B-phase line alternating current sensor for detecting B-phase line current and a C-phase line alternating current sensor for detecting C-phase line current; and the output ends of the A-phase line alternating current sensor, the B-phase line alternating current sensor and the C-phase line alternating current sensor are connected with the ICP controller.
5. A current sensor sensing and control system for an energy storage converter as claimed in claim 1 wherein: the power supply subsystem comprises a first direct-current switching power supply and a second direct-current switching power supply, the first direct-current switching power supply is connected with the second direct-current switching power supply in series, the input end of the first direct-current switching power supply is connected with a power grid, and the output end of the first direct-current switching power supply is connected with the input end of the second direct-current switching power supply; and the power supply ends of the ICP controller, the filter capacitor current detector, the alternating current detector and the direct current detector are all connected with the output end of the second direct current switching power supply.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121359998.6U CN215733432U (en) | 2021-06-18 | 2021-06-18 | Current sensor detection and control system for energy storage converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121359998.6U CN215733432U (en) | 2021-06-18 | 2021-06-18 | Current sensor detection and control system for energy storage converter |
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| CN215733432U true CN215733432U (en) | 2022-02-01 |
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| CN202121359998.6U Active CN215733432U (en) | 2021-06-18 | 2021-06-18 | Current sensor detection and control system for energy storage converter |
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- 2021-06-18 CN CN202121359998.6U patent/CN215733432U/en active Active
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