Frequency voltage emergency control device

Abstract

The utility model discloses a frequency voltage emergency control device, which comprises a master control module, a voltage acquisition module, a power supply module, a PNL module, an input module, an output module, a signal module and a mother board module, and is characterized in that the master control module and the power supply module are connected to the mother board module; the master control module is directly connected with the input module, the output module and the signal module through CAN (Controller Area Network) buses and is directly connected with the voltage acquisition module; and the main control module is connected with the PNL module through an LVDS (Low Voltage Differential Signaling) interface. According to the frequency voltage emergency control device provided by the utility model, when the frequency voltage of a power system does not meet the requirement, the corresponding load is cut off according to a strategy, the stability of the frequency and the voltage of the system is maintained, the SoC technology is adopted, the integration level is high, the stability is good, the intelligent input and output module is convenient to expand, the input and output plug-in is high in integration level, and the reliability is high. The number of plug-ins can be reduced.

Description

Technical Field

[0001] The utility model relates to a frequency and voltage emergency control technology for an electric power system, in particular to a frequency and voltage emergency control device. Background Art

[0002] During the operation of the power system, there are problems of active or reactive power imbalance. Active power imbalance will cause the frequency of the power system to change, and reactive power imbalance will cause the voltage of the system to change. When the frequency and voltage of the system drop rapidly, a frequency and voltage emergency control device is required to cut off the load and return the frequency and voltage of the system to a qualified level. The frequency and voltage emergency control device is the third line of defense of the power system, and it is also the last safety barrier for the stable operation of the system, and it is an important guarantee for the safety and stability of the power system.

[0003] However, the existing frequency and voltage emergency control devices have poor chip processing capabilities, low input and output integration, and require a large number of plug-ins. Utility Model Content

[0004] The purpose of the utility model is to provide a frequency and voltage emergency control device to solve the above problems.

[0005] In order to achieve the above object, the utility model provides the following technical solutions: a frequency voltage emergency control device, including a main control module, a voltage acquisition module, a power supply module, a PNL module, an input module, an output module, a signal module and a motherboard module, wherein:

[0006] The main control module and the power supply module are connected to the motherboard module;

[0007] The main control module is directly connected to the input module, the output module and the signal module via a CAN bus connection and the voltage acquisition module;

[0008] The main control module is connected to the PNL module via an LVDS interface.

[0009] Preferably, the main control module consists of a ZYNQ processor, 3 Ethernet interfaces, an EEPROM memory, a clock chip, 4 RS485 / RS232 communication interfaces, 1 RS485 debugging interface, a B code timing interface, 1 LVDS interface and 1 CAN bus.

[0010] Preferably, the 3-way Ethernet interface and the 4-way RS485 / RS232 communication interface are connected to the Ethernet and RS485 buses respectively.

[0011] Preferably, the power supply module is composed of a power supply module and a power failure alarm signal output relay.

[0012] Preferably, the signal module consists of a group of holding relays, a group of non-holding relays and four pairs of non-holding relays.

[0013] Preferably, the PNL module comprises eleven indicator lights, nine buttons and a liquid crystal screen.

[0014] Preferably, the input module, the output module and the main control module are connected via the CAN bus.

[0015] Preferably, the open input module consists of an open input common end and 27-way open inputs.

[0016] Preferably, the output module is composed of a drive motor and a relay.

[0017] Preferably, the voltage acquisition module consists of 6 voltage acquisition loops, an RC filter loop and an AD chip.

[0018] In the above technical scheme, the utility model provides a frequency voltage emergency control device, which has the following beneficial effects: when the frequency and voltage of the power system decrease, the device can automatically cut off the load according to the frequency reduction value or the voltage reduction value, so that the active and reactive power between the system power supply and the load can be balanced again, thereby ensuring the stable operation of the power grid frequency and voltage. The main control module of the device adopts SoC technology, has powerful processing capabilities, integrates two ARM cores and an FPGA, is highly integrated, has high safety and stability, and uses intelligent modules for input and output, which is convenient for flexible expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A module architecture diagram provided for an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the principle of the intelligent opening of the utility model. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1-2As shown, a frequency voltage emergency control device includes a main control module, a voltage acquisition module, a power supply module, a PNL module, an input module, an output module, a signal module and a motherboard module, wherein:

[0024] The main control module and the power supply module are connected to the motherboard module;

[0025] The main control module is directly connected to the input module, output module and signal module through the CAN bus connection and the voltage acquisition module;

[0026] The main control module and the PNL module are connected via LVDS interface data.

[0027] Specific:

[0028] The main control module consists of a ZYNQ processor, 3 Ethernet interfaces, EEPROM memory, a clock chip, 4 RS485 / RS232 communication interfaces, 1 RS485 debugging interface, a B code timing interface, 1 LVDS interface and 1 CAN bus.

[0029] The 3-way Ethernet interface and 4-way RS485 / RS232 communication interface in the above-mentioned embodiment are connected to the Ethernet network and the RS485 bus network.

[0030] Secondly, the power supply module consists of a power supply module and a power failure alarm signal output relay.

[0031] Furthermore, the signal module is composed of a group of holding relays, a group of non-holding relays and four pairs of non-holding relays.

[0032] Furthermore, the PNL module includes indicator lights, buttons and LCD screens. The 11 indicator lights are the operation light, abnormal light, maintenance light, strategy lock light, action light and 6 standby lights. The 9 buttons are "up", "down", "left", "right", "confirm", "cancel", "reset", "plus" and "minus". The LVDS interface is used for the main control module connection.

[0033] As an embodiment further provided by the present invention, the input module, the output module and the signal module are connected to the main control module via a CAN bus.

[0034] Combination Figure 2 For further explanation:

[0035] The above-mentioned input module consists of an input common terminal and 27 inputs, and each module can support the collection of 27 inputs. In the specific implementation process, when the external voltage value is applied, after optical coupling isolation, the signal is sent to the inverter, and then connected to the GPIO pin of the ARM microcontroller, and the ARM microcontroller reads and processes it uniformly, and the processed data is sent to the main control module through the CAN bus.

[0036] The above-mentioned output module is composed of a drive motor and a relay, and each module can support 14 outputs. When output is required, the main control module sends the output command via the CAN bus to the ARM microcontroller of the output module. The ARM microcontroller sets the corresponding GPIO pin of the output circuit, triggers the relay action of the output circuit, and completes the output action.

[0037] Furthermore, the voltage collection module is composed of 6 voltage collection loops, an RC filter loop and an AD chip.

[0038] Working principle:

[0039] The switch input signal is sent to the ARM microcontroller through the photoelectric isolation of the input module, and then the status information is sent to the programmable logic module (PL) of the main control module via the CAN communication bus; the analog signal is sent to the analog-to-digital conversion module after isolation and transformation through the voltage acquisition module, and the converted sampled data is sent to the programmable logic module (PL) of the main control module. The programmable logic module (PL) completes the synchronization of the analog quantity and the input quantity, and then sends the sampled data to the first application processor unit through the internal bus of the device. After receiving the sampled data, the first application processor unit performs logical processing to determine whether the system's frequency, voltage, frequency change rate and voltage change rate are greater than the basic wheel, acceleration wheel and special wheel action conditions. If the action conditions are met, the first application processor unit will send the output signal to the output module through the programmable logic module (PL) to control the CAN bus, and the output signal will be sent to the output module, which will control the output relay to complete the load removal. At the same time, the recording and event generation are started, and the recording and event are sent to the second application processor unit, which completes the recording and event recording and storage, and sends the event to the plant monitoring system via Ethernet and MMS through the second application processor unit. The indicator light of the PNL module can indicate the operating status of the device. The action time, alarm and fault report of the device can be viewed locally through the LCD panel of the PNL module.

[0040] It should be noted that the first application processor unit, the second application processor unit and the programmable logic module (PL) in the above embodiments are all common technical knowledge, and can also be learned through common knowledge in combination with the technical features and principles recorded in the application documents, so they are not described in detail.

[0041] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A frequency and voltage emergency control device, characterized in that: It includes main control module, voltage acquisition module, power supply module, PNL module, input module, output module, signal module and motherboard module, among which: The main control module and the power supply module are connected to the motherboard module; The main control module is directly connected to the input module, the output module and the signal module via a CAN bus connection and the voltage acquisition module; The main control module is connected to the PNL module via an LVDS interface.

2. A frequency and voltage emergency control device according to claim 1, characterized in that: The main control module consists of a ZYNQ processor, 3 Ethernet interfaces, an EEPROM memory, a clock chip, 4 RS485 / RS232 communication interfaces, 1 RS485 debugging interface, a B code timing interface, 1 LVDS interface and 1 CAN bus.

3. A frequency and voltage emergency control device according to claim 2, characterized in that: The three Ethernet interfaces and the four RS485 / RS232 communication interfaces are connected to the Ethernet and RS485 buses respectively.

4. A frequency and voltage emergency control device according to claim 1, characterized in that: The power supply module is composed of a power supply module and a power failure alarm signal output relay.

5. A frequency and voltage emergency control device according to claim 1, characterized in that: The signal module is composed of a group of holding relays, a group of non-holding relays and four pairs of non-holding relays.

6. A frequency and voltage emergency control device according to claim 1, characterized in that: The PNL module comprises an indicator light, a button and a liquid crystal screen.

7. A frequency and voltage emergency control device according to claim 1, characterized in that: The input module, output module and signal module are connected with the main control module through the CAN bus.

8. A frequency and voltage emergency control device according to claim 7, characterized in that: The open input module consists of an open input common terminal and 27 open inputs.

9. A frequency and voltage emergency control device according to claim 7, characterized in that: The output module is composed of a driving motor and a relay.

10. A frequency and voltage emergency control device according to claim 1, characterized in that: The voltage acquisition module is composed of 6-way voltage acquisition circuits, an RC filter circuit and an AD chip.

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