Micro-grid power environment detection device and method

Abstract

The invention discloses a micro-grid power environment detection device and method. The device comprises a leakage current detection assembly, a temperature detection assembly, a wireless communication assembly, an environment detection assembly and a control assembly. The leakage current detection assembly is used for detecting leakage current data of the energy storage device, the temperature detection assembly is used for detecting temperature data of the energy storage device, the electric power environment in the energy storage device can be detected, and the environment detection assembly is used for detecting temperature and humidity data, wind speed data and smoke concentration data of the environment where the energy storage device is located. According to the energy storage device, the effect of detecting data of the environment where the energy storage device is located can be achieved, meanwhile, the wireless communication assembly and the control assembly are arranged, the control assembly receives detection data and conducts comparative analysis, and then the received detection data and analysis results are sent to external equipment in real time through the wireless communication assembly; the effect of intelligent remote detection can be realized, so that the effect of timely and effectively discovering the abnormity of the power environment is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of power environment detection, and in particular relates to a microgrid power environment detection device and method. Background Art

[0002] A microgrid system refers to a small power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, loads, monitoring and protection devices, etc. It can achieve self-control, protection and management. This system has the characteristics of low cost, low voltage and low pollution. When the large power grid has problems and cannot supply power in time, this system can continue to supply power as a subsequent energy source. In the working state of the microgrid system, the power environment of the energy storage device affects the safety of electricity use and the stability of the power system. Therefore, it is necessary to detect the power environment of the energy storage device in the microgrid power system and ensure the normal operation of the energy storage device.

[0003] However, traditional detection methods are difficult to effectively detect the power environment of energy storage devices due to problems such as the random installation location of detection components and susceptibility to electromagnetic interference. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes a microgrid power environment detection device and method, which can solve the defect of the prior art that the power environment cannot be effectively detected.

[0005] The technical solution of the present invention is implemented as follows:

[0006] A microgrid power environment detection device comprises a leakage current detection component, a temperature detection component, a wireless communication component, an environment detection component and a control component, wherein the leakage current detection component is used to detect leakage current data of an energy storage device, the temperature detection component is used to detect temperature data of the energy storage device, the environment detection component is used to detect temperature and humidity data, wind speed data and smoke concentration data of the environment in which the energy storage device is located, the leakage current detection component, the temperature detection component and the environment detection component are electrically connected to the control component respectively, and the control component is communicatively connected to an external device via the wireless communication component.

[0007] As a further optional solution of the microgrid power environment detection device, the control component includes a leakage current sampling port, a temperature sampling port, an ambient temperature and humidity sampling port, a wind speed sampling port and a smoke concentration sampling port.

[0008] As a further optional solution of the microgrid power environment detection device, the energy storage device includes an inverter and an energy storage battery, the leakage current detection component is arranged at the AC end of the inverter, the AC end of the inverter is connected to the grid transformer, and the DC end of the inverter is connected to the energy storage battery.

[0009] As a further optional scheme of the microgrid power environment detection device, the leakage current detection component includes an AC leakage current sensor and a leakage current meter, the AC input end of the AC leakage current sensor is connected to the AC end of the energy storage device inverter, the DC output end of the AC leakage current sensor is electrically connected to the leakage current meter, and the leakage current meter is electrically connected to the leakage current sampling port of the control component.

[0010] As a further optional solution of the microgrid power environment detection device, the leakage current detection component reduces the impact of electromagnetic interference on the leakage current detection component by shielding cables, grounding, using an isolation transformer, or selecting a leakage current detector equipped with electromagnetic shielding.

[0011] As a further optional scheme for the microgrid power environment detection device, the temperature detection component includes a thermistor and a voltage divider resistor, the thermistor is arranged on the energy storage battery, one end of the thermistor is used to be electrically connected to the temperature sampling port of the control component, the other end of the thermistor is grounded, one end of the voltage divider resistor is electrically connected to the positive electrode of the energy storage battery, and the other end of the voltage divider resistor is electrically connected to the connection node between the control component and the thermistor.

[0012] As a further optional solution of the microgrid power environment detection device, the wireless communication component adopts any one of a GPRS communication module, a Bluetooth module, a UWB module and a Zigbee module.

[0013] As a further optional solution of the microgrid power environment detection device, the control component includes an STM32L476Rx chip and its peripheral circuits.

[0014] As a further optional scheme of the microgrid power environment detection device, the environmental detection component includes a temperature and humidity sensor, a wind speed sensor and a smoke sensor, and the temperature and humidity sensor, wind speed sensor and smoke sensor are electrically connected to the environmental temperature and humidity sampling port, wind speed sampling port and smoke concentration sampling port of the control component respectively.

[0015] A method for detecting a microgrid power environment comprises the following steps:

[0016] Step (1), detecting leakage current data of the energy storage device by means of a leakage current detection component arranged between the AC end of the energy storage device converter and the grid transformer; the leakage current detection component comprises an AC leakage sensor and a leakage current meter.

[0017] Step (2), detecting the temperature data of the energy storage device by means of a set temperature detection component;

[0018] The temperature detection component includes a thermistor and a voltage-dividing resistor. The thermistor is arranged on the energy storage battery of the energy storage device, and the voltage-dividing resistor is arranged between the energy storage battery and the thermistor.

[0019] The change of the temperature state of the energy storage battery can change the resistance value of the thermistor, that is, it can change the voltage dividing capacity of the thermistor, so that the potential of the connection node between the thermistor and the voltage dividing resistor changes, thereby generating a temperature detection signal.

[0020] Step (3), detecting the temperature and humidity data, wind speed data and smoke concentration data of the environment in which the energy storage device is located by means of the set environment detection component.

[0021] The environmental detection component includes a temperature and humidity sensor, a wind speed sensor and a smoke sensor, which are electrically connected to the environmental temperature and humidity sampling port, the wind speed sampling port and the smoke concentration sampling port of the control component respectively.

[0022] Step (4), receiving the detection data through the control component, and sending the received detection data to the external device through the wireless communication component. The external device can observe the various data transmitted and send instructions to the control component. After receiving the corresponding instructions, the control component controls the microgrid power environment detection device to complete real-time detection, timed detection, stop detection and other functions, thereby realizing intelligent remote detection.

[0023] The control component receives corresponding detection signals through the leakage current sampling port, temperature sampling port, ambient temperature and humidity sampling port, wind speed sampling port and smoke concentration sampling port, and compares the data contained in the detection signal with the corresponding threshold value to determine whether the microgrid power environment is abnormal, and sends the analysis result together with the detection data to the external device in real time through the wireless communication component to determine whether the state of the energy storage device is abnormal.

[0024] The beneficial effects of the present invention are as follows:

[0025] By setting a leakage current detection component, a temperature detection component and an environment detection component, the leakage current detection component is used to detect the leakage current data of the energy storage device, and the temperature detection component is used to detect the temperature data of the energy storage device, so as to achieve the effect of detecting the power environment inside the energy storage device, and the environment detection component is used to detect the temperature and humidity data, wind speed data and smoke concentration data of the environment in which the energy storage device is located, so as to achieve the effect of detecting the environmental data of the energy storage device. At the same time, by setting a wireless communication component and a control component, the control component receives the detection data of the leakage current detection component, the temperature detection component and the environment detection component and performs comparative analysis, and then sends the received detection data and analysis results to the external device in real time through the wireless communication component, so as to achieve the effect of intelligent remote detection, thereby achieving the effect of timely and effective discovery of power environment abnormalities. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the composition of a microgrid power environment detection device of the present invention;

[0028] Figure 2 is a circuit diagram of the temperature detection component in the present invention;

[0029] Figure 3 It is a circuit diagram of the control component in the present invention. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] refer to Figure 1-3A microgrid power environment detection device includes a leakage current detection component, a temperature detection component, an environment detection component, a wireless communication component and a control component, wherein the leakage current detection component is used to detect leakage current data of an energy storage device, the temperature detection component is used to detect temperature data of the energy storage device, the environment detection component is used to detect temperature and humidity data, wind speed data and smoke concentration data of the environment in which the energy storage device is located, the leakage current detection component, the temperature detection component and the environment detection component are electrically connected to the control component respectively, and the control component is communicated with an external device through the wireless communication component.

[0032] In this embodiment, by setting a leakage current detection component, a temperature detection component and an environmental detection component, the leakage current detection component is used to detect the leakage current data of the energy storage device, the temperature detection component is used to detect the temperature data of the energy storage device, and the environmental detection component is used to detect the temperature and humidity data, wind speed data and smoke concentration data of the environment in which the energy storage device is located, it is possible to achieve the effect of detecting the power environment inside the energy storage device and the environmental data in which it is located. At the same time, by setting a wireless communication component and a control component, the control component receives the detection data of the leakage current detection component, the temperature detection component and the environmental detection component, and sends the received detection data and the comparison and analysis results to the external device through the wireless communication component, which can achieve the effect of intelligent remote detection, thereby achieving the effect of timely and effective discovery of power environment abnormalities.

[0033] In one embodiment, the PA13 port of the control chip is used as a leakage current sampling port, the PC5 port is used as a temperature sampling port, and the PA10 port, PA11 port, and PA12 port are used as an ambient temperature and humidity sampling port, a wind speed sampling port, and a smoke concentration sampling port, respectively.

[0034] In one embodiment, the energy storage device includes an inverter and an energy storage battery, the leakage current detection component is arranged at the AC end of the inverter, the AC end of the inverter is used to connect to the grid transformer, and the DC end of the inverter is connected to the energy storage battery.

[0035] In one embodiment, the leakage current detection component includes an AC leakage sensor and a leakage current meter, wherein the AC input end of the AC leakage current sensor is connected to the AC end of the converter, the AC leakage sensor is electrically connected to the leakage current meter, and the leakage current meter is electrically connected to the leakage current sampling port of the control component.

[0036] In one embodiment, a leakage current detection component is added between the AC end of the converter and the grid transformer, and the control component receives a leakage current detection signal through a leakage current sampling port, and compares the leakage current value data contained in the leakage current detection signal with the leakage current threshold value, so as to determine whether the leakage current of the energy storage device is abnormal, that is, whether an insulation fault occurs, to protect the safety of the energy storage device.

[0037] In one embodiment, the temperature detection component includes a thermistor RT1 and a voltage divider resistor R01, the thermistor RT1 is arranged on the energy storage battery, one end of the thermistor RT1 is used to be electrically connected to the temperature sampling port of the control component, the other end of the thermistor RT1 is grounded, one end of the voltage divider resistor R01 is used to be electrically connected to the energy storage battery, and the other end of the voltage divider resistor R01 is electrically connected to the connection node between the control component and the thermistor RT1.

[0038] In this embodiment, the change of the temperature state of the energy storage battery can change the resistance value of the thermistor, that is, it can change the voltage dividing capacity of the thermistor, so that the potential of the connection node of the thermistor and the voltage dividing resistor changes, thereby generating a temperature detection signal. The control component receives the temperature detection signal through the temperature sampling port, and compares the temperature value data contained in the temperature detection signal with the temperature threshold value, so as to determine whether the temperature state of the energy storage battery is abnormal.

[0039] Preferably, the wireless communication component adopts any one of a GPRS communication module, a Bluetooth module, a UWB module and a Zigbee module.

[0040] Preferably, the control component includes an STM32L476Rx chip and its peripheral circuits, the peripheral circuits include a power supply circuit and a crystal oscillator circuit, the structure of the power supply circuit is that one end of capacitor C4 is electrically connected to the connection node of the chip's positive power supply and the chip's VDD port, the other end of capacitor C4 is electrically connected to the chip's VSS port and the connection node of the chip's power ground, the structure of the crystal oscillator circuit is that one end of the crystal oscillator is electrically connected to one end of capacitor C1 and the connection node of the chip's PH0 / OSCIN port, the other end of the crystal oscillator is electrically connected to one end of capacitor C2 and the connection node of the chip's PH1 / OSCOUT port, one end of resistor R1 is electrically connected to one end of the crystal oscillator and the connection node of the chip's PH0 / OSCIN port, the other end of resistor R1 is electrically connected to the other end of the crystal oscillator and the connection node of the chip's PH1 / OSCOUT port, and the other end of capacitor C1 is electrically connected to the other end of capacitor C2.

[0041] Preferably, the environmental detection component includes a temperature and humidity sensor, a wind speed sensor and a smoke sensor, and the temperature and humidity sensor, wind speed sensor and smoke sensor are electrically connected to the environmental temperature and humidity sampling port, wind speed sampling port and smoke concentration sampling port of the control component respectively.

[0042] In this embodiment, the function of the environmental detection component is to detect the temperature and humidity data, wind speed data and smoke concentration data of the environment in which the energy storage device is located. The control component receives detection signals such as temperature and humidity, wind speed and smoke concentration through the environmental data sampling port, and compares the data contained in these detection signals with the threshold value to determine whether the environment in which the energy storage device is located is abnormal.

[0043] Preferably, the external device is any one of a computer, a mobile phone, a tablet, a panel, and a touch screen. The external device can observe various transmitted data and send instructions to the control component. After receiving the corresponding instructions, the control component controls the microgrid power environment detection device to complete real-time detection, timing detection, stop detection and other functions, thereby realizing intelligent remote detection.

[0044] A method for detecting a microgrid power environment comprises the following steps:

[0045] Step (1), detecting leakage current data of the energy storage device by means of a leakage current detection component arranged between the AC end of the energy storage device converter and the grid transformer; the leakage current detection component comprises an AC leakage sensor and a leakage current meter.

[0046] Step (2), detecting the temperature data of the energy storage device by means of a set temperature detection component;

[0047] The temperature detection component includes a thermistor and a voltage-dividing resistor. The thermistor is arranged on the energy storage battery of the energy storage device, and the voltage-dividing resistor is arranged between the energy storage battery and the thermistor.

[0048] The change of the temperature state of the energy storage battery can change the resistance value of the thermistor, that is, it can change the voltage dividing capacity of the thermistor, so that the potential of the connection node between the thermistor and the voltage dividing resistor changes, thereby generating a temperature detection signal.

[0049] Step (3), detecting the temperature and humidity data, wind speed data and smoke concentration data of the environment in which the energy storage device is located by means of the set environment detection component.

[0050] Step (4), receiving the detection data through the control component, and sending the received detection data to the external device through the wireless communication component. The external device can observe the various data transmitted and send instructions to the control component. After receiving the corresponding instructions, the control component controls the microgrid power environment detection device to complete real-time detection, timed detection, stop detection and other functions, thereby realizing intelligent remote detection.

[0051] The control component receives the corresponding detection signal through the leakage current sampling port, temperature sampling port, and environmental data sampling port, and compares the data contained in the detection signal with the corresponding threshold value to determine whether the microgrid power environment is abnormal, and sends the analysis result together with the detection data to the external device in real time through the wireless communication component to determine whether the state of the energy storage device is abnormal.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A microgrid power environment detection device, characterized in that: It includes a leakage current detection component, a temperature detection component, a wireless communication component, an environment detection component and a control component. The leakage current detection component is used to detect the leakage current data of the energy storage device. The temperature detection component is used to detect the temperature data of the energy storage device. The environment detection component is used to detect the temperature and humidity data, wind speed data and smoke concentration data of the environment in which the energy storage device is located. The leakage current detection component, the temperature detection component and the environment detection component are electrically connected to the control component respectively, and the control component is connected to the external device through the wireless communication component.

2. A microgrid power environment detection device according to claim 1, characterized in that: The control component includes a leakage current sampling port, a temperature sampling port, an ambient temperature and humidity sampling port, a wind speed sampling port and a smoke concentration sampling port.

3. A microgrid power environment detection device according to claim 1, characterized in that: The energy storage device includes an inverter and an energy storage battery. The leakage current detection component is arranged at the AC end of the inverter. The AC end of the inverter is connected to a grid transformer, and the DC end of the inverter is connected to the energy storage battery.

4. A microgrid power environment detection device according to claim 3, characterized in that: The leakage current detection component includes an AC leakage current sensor and a leakage current meter. The AC input end of the AC leakage current sensor is connected to the AC end of the energy storage device inverter, the DC output end of the AC leakage current sensor is electrically connected to the leakage current meter, and the leakage current meter is electrically connected to the leakage current sampling port of the control component.

5. A microgrid power environment detection device according to claim 4, characterized in that: The leakage current detection component reduces the influence of electromagnetic interference on the leakage current detection component by shielding cables, grounding, using an isolation transformer or selecting a leakage current detector equipped with electromagnetic shielding.

6. A microgrid power environment detection device according to claim 2, characterized in that: The temperature detection component includes a thermistor and a voltage divider resistor, the thermistor is arranged on the energy storage battery, one end of the thermistor is used to be electrically connected to the temperature sampling port of the control component, the other end of the thermistor is grounded, one end of the voltage divider resistor is electrically connected to the positive electrode of the energy storage battery, and the other end of the voltage divider resistor is electrically connected to the connection node between the control component and the thermistor.

7. A microgrid power environment detection device according to claim 1, characterized in that: The wireless communication component adopts any one of a GPRS communication module, a Bluetooth module, a UWB module and a Zigbee module.

8. A microgrid power environment detection device according to claim 1 or 2, characterized in that: The control component includes an STM32L476Rx chip and its peripheral circuits.

9. A microgrid power environment detection device according to claim 2, characterized in that: The environmental detection component includes a temperature and humidity sensor, a wind speed sensor and a smoke sensor, which are electrically connected to the environmental temperature and humidity sampling port, the wind speed sampling port and the smoke concentration sampling port of the control component respectively.

10. A microgrid power environment detection method, characterized in that: The steps include: Step (1), detecting leakage current data of the energy storage device by means of a leakage current detection component disposed between the AC end of the energy storage device converter and the grid transformer; the leakage current detection component comprises an AC leakage sensor and a leakage current meter; Step (2), detecting the temperature data of the energy storage device by means of a set temperature detection component; The temperature detection component includes a thermistor and a voltage-dividing resistor, wherein the thermistor is arranged on the energy storage battery of the energy storage device, and the voltage-dividing resistor is arranged between the energy storage battery and the thermistor; The change of the temperature state of the energy storage battery can change the resistance value of the thermistor, that is, it can change the voltage dividing capacity of the thermistor, so that the potential of the connection node of the thermistor and the voltage dividing resistor changes, thereby generating a temperature detection signal; Step (3), detecting the temperature and humidity data, wind speed data and smoke concentration data of the environment in which the energy storage device is located by means of the provided environment detection component; The environment detection component includes a temperature and humidity sensor, a wind speed sensor and a smoke sensor, and the temperature and humidity sensor, the wind speed sensor and the smoke sensor are electrically connected to the environment temperature and humidity sampling port, the wind speed sampling port and the smoke concentration sampling port of the control component respectively; Step (4), receiving the detection data through the control component, and sending the received detection data to the external device through the wireless communication component, the external device can observe the various data transmitted, and send instructions to the control component, after receiving the corresponding instructions, the control component controls the microgrid power environment detection device to complete real-time detection, timing detection or stop detection function, so as to realize intelligent remote detection; The control component receives corresponding detection signals through the leakage current sampling port, temperature sampling port, ambient temperature and humidity sampling port, wind speed sampling port and smoke concentration sampling port, and compares the data contained in the detection signal with the corresponding threshold value to determine whether the microgrid power environment is abnormal, and sends the analysis result together with the detection data to the external device in real time through the wireless communication component to determine whether the state of the energy storage device is abnormal.

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