CN107608438B - rental house safety electricity utilization control system and control method based on current control technology - Google Patents
rental house safety electricity utilization control system and control method based on current control technology Download PDFInfo
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Abstract
the invention discloses a rental house safety electricity utilization control system based on a current control technology, which comprises an entrance current detection unit, a master controller and a plurality of rental house electricity utilization units, wherein the entrance current detection unit is used for detecting the entrance current of a house; the plurality of electricity using units for the rental houses are connected with the household current detection unit through the multi-path air switches; each electricity utilization unit of the rental houses comprises a current detection and control module, and the current detection and control module collects real-time working current of each high-power electric appliance in real time and wirelessly transmits the real-time working current to a master controller through the controller; the main controller determines the actual upper limit of the house-entry total current according to the house-entry total current detected by the house-entry current detection unit, and distributes the working current of the high-power electric appliances of each rental house by combining the real-time working current of the high-power electric appliances of each rental house electric unit so as to control the working state of the high-power electric appliances in each rental house. The invention also provides a safe electricity utilization control method for the rental houses. The invention can ensure the electricity utilization safety of the rental houses.
Description
Technical Field
The invention belongs to the field of electricity safety management, and particularly relates to a rental house safety electricity utilization control system and a control method based on a current control technology.
Background
The rental houses are products for economic development and products with high house price at present, and have small area and low price. Although the rental houses are small, living facilities such as electric appliances are all available, such as air conditioners, electric water heaters and the like, so that the electricity consumption of the rental houses is very easy to overload, and the fire accident is endless, thereby bringing serious social problems and economic losses.
when the current limiting switch is used in a family, the current limiting switch is normally limited to 63A, and the current limiting switch can meet the requirements of common electrical equipment of a family, such as electric water heaters, air conditioners, microwave ovens and other high-power electrical appliances. However, in rental houses, high-powered appliances are multiplied and when used simultaneously, the total load is easily exceeded. Taking an example of an 8-cell rental house, if 8 water heaters (rated 10A) and 8 air conditioners (rated 5A) are used simultaneously, the total current will reach at least 120A, far exceeding the current limit 63A, resulting in tripping or wire heating. Therefore, it is necessary to effectively control the use of large-power electric appliances in rental houses.
disclosure of Invention
The invention aims to provide a rental house safety electricity utilization control system and a control method based on a current control technology, the control system and the control method can control a large-power electric appliance of a rental house in real time, the working current of the large-power electric appliance is reasonably distributed according to the working state of an electric water heater and the total current of house entries, the total power is controlled within a safety permission range, the problem of overload of the electric appliance of the rental house is solved, and the electricity utilization safety of the rental house is improved.
the technical scheme adopted by the invention is as follows:
A rental house safety electricity utilization control system based on a current control technology comprises an entrance current detection unit, a master controller and a plurality of rental house electricity utilization units; the plurality of electricity using units for the rental houses are connected with the household current detection unit through the multi-path air switches;
Each electricity utilization unit of the rental houses comprises a current detection and control module, an electric leakage protection switch, a controller and a wireless data transmission unit, wherein the electric leakage protection switch is respectively connected with the current detection and control module, the controller and a high-power electric appliance; the current detection and control module collects the working current of each high-power electric appliance in real time and transmits the working current to the controller, and the controller transmits the working current to the master controller in a wireless manner;
the main controller determines the actual upper limit of the house-entry total current according to the house-entry total current detected by the house-entry current detection unit, and distributes the working current of the high-power electric appliances of each rental house by combining the real-time working current of the high-power electric appliances of each rental house electric unit so as to control the working state of the high-power electric appliances in each rental house.
According to the scheme, the current detection and control module comprises the controllable silicon and a current transformer, the current detection and control module converts the control current distributed by the master controller into the conduction angle of the controllable silicon, the timer in the controller obtains a conduction pulse control signal, and then the controllable silicon is controlled, so that the current of the high-power electric appliance is controlled by controlling the conduction angle of the controllable silicon.
According to the scheme, when the high-power electric appliance is an electric water heater, the power utilization unit of the rental house further comprises a water temperature detection module, and the water temperature detection module detects the water temperature of the electric water heater and wirelessly transmits the water temperature to the master controller through the controller; the master controller obtains the working state of each electric water heater according to the real-time working current of the electric water heater of each rental house and the water temperature of the electric water heater, and returns a corresponding current control instruction to control the working current of the electric water heater.
According to the scheme, the working state of the electric water heater comprises a shutdown state, a heat preservation state, a power-off using state, an electrifying using state, a heating state and an electric leakage state;
the shutdown state is that the water temperature is unchanged and the working current is zero within a certain time range;
The heat preservation state is that the water temperature change is not more than a certain value and the working current is less than a certain value within a certain time range;
the power-off use state is that the water temperature is reduced and the working current is zero within a certain time range;
The electrified use state is that the water temperature change is not more than a certain value and the working current is more than a certain value within a certain time range;
The heating state is that the water temperature rises within a certain time range, and the working current is greater than a certain value;
The leakage state is the condition that the working current is higher than the rated current of the electric water heater or the current is still existed when the conduction angle is zero.
According to the scheme, the master controller calculates and reasonably distributes current according to the working state of the electric water heater, and the electric water heater in the leakage state preferentially turns off a power switch and gives an alarm; the electric water heater is in a use state and has power supply priority; the electric water heater is in a heating state and has a second priority. Namely: the electric water heater in the electrified use state is ensured to work normally, the working current of the electric water heater in the heating state is properly reduced, and the heating time is prolonged; and for the leakage state, the control switch is powered off and alarms.
according to the scheme, the ZigBee wireless sensor network is adopted for wireless transmission, so that the power consumption is low, the automatic networking can be realized, and the data transmission is not influenced by randomly increasing and decreasing the nodes.
The invention also provides a rental house safety electricity utilization control method based on the control system, which comprises the following steps:
The current detection and control module of each electricity using unit of the rental house collects the real-time working current of the high-power electric appliance in real time and transmits the real-time working current to the controller; the controller wirelessly transmits the real-time working current to the master controller;
and the master controller distributes the working current of each high-power electric appliance of the rental houses according to the calculated actual upper limit of the total current of the house and the real-time working current of the high-power electric appliances of the electricity utilization units of the rental houses so as to control the working state of each high-power electric appliance.
according to the scheme, when the high-power device is an electric water heater, the water temperature detection module detects the water temperature of the electric water heater and wirelessly transmits the water temperature to the master controller through the controller; the master controller obtains the working state of the electric water heater according to the real-time working current of the electric water heater of each rental house and the water temperature of the electric water heater, and returns a corresponding current control instruction to control the working current of the electric water heater;
The working state of the electric water heater comprises a shutdown state, a heat preservation state, a power-off use state, an electrifying use state, a heating state and an electric leakage state;
The shutdown state is that the water temperature is unchanged and the working current is zero within a certain time range;
The heat preservation state is that the water temperature change is not more than a certain value and the working current is less than a certain value within a certain time range;
The power-off use state is that the water temperature is reduced and the working current is zero within a certain time range;
The electrified use state is that the water temperature change is not more than a certain value and the working current is more than a certain value within a certain time range;
The heating state is that the water temperature rises within a certain time range, and the working current is greater than a certain value;
the leakage state is the condition that the working current is higher than the rated current of the electric water heater or the current is still existed when the conduction angle is zero.
according to the scheme, the master controller calculates and reasonably distributes current according to the working state of the electric water heater, and the electric water heater has power supply priority when being in a power-on use state; the electric water heater is in a heating state and has a second priority; and for the water heater in the electric leakage state, the power supply is controlled to be turned off and an alarm is given.
according to the scheme, the master controller controls the electric water heater through a fuzzy control strategy based on the working current of the electric water heater, and the step of calculating the working current of each electric water heater in the fuzzy control strategy is as follows:
If the total current is I0, N rooms are total, the electricity consumption of the basic electrical appliance in the nth room is Ibn, the electricity consumption of the electric water heater is Ihn, then the total current is I0
The upper limit IU of the total current I0 is IH-IF, wherein IH is the upper limit of the current entering the household, and IF is the full-load working current of a single electric water heater;
therefore, the total current Ih available for the operation of the electric water heater is
the quantity of the electric water heaters in the electrified using state is p, the quantity of the electric water heaters in the heating state is q, and an equation set is provided:
in the formula, Ip is the working current of the electric water heater in a power-on use state, Iq is the working current of the electric water heater in a heating state, and IF is the full-load working current of a single electric water heater;
considering the electricity priority of the electric water heater in the power-on use state, the electricity current is distributed as
I＝I/p≤I
Considering the preference of the electric water heater in the heating state, the electricity current is distributed as
I＝(I-pI)/q≤I。
according to the scheme, the master controller controls the electric water heater through an electric appliance working current control strategy, and specifically comprises the following steps: the current detection and control module converts the control current distributed by the master controller into the conduction angle of the silicon controlled rectifier, obtains a conduction pulse signal through an internal timer, and then controls the silicon controlled rectifier, so that the current of the electric water heater is controlled by controlling the conduction angle of the silicon controlled rectifier.
In the invention, the electric appliances of the rental houses have part of basic requirements and must be ensured to be normally used, such as illumination, socket electricity utilization (such as computer electricity utilization) and air conditioning; some are not essential needs, for example high-power electric water heater, this application can make high-power electric water heater use according to specific use condition timesharing or current-limiting use, avoids overload operation.
the invention has the beneficial effects that:
The current detection and control module detects the real-time working current of the high-power electrical appliances in each room in real time, the master controller reasonably controls the working current of the high-power electrical appliances in each room according to the real-time working current, and ensures that the total current is under the rated load, so that the overload operation of the electrical appliances in the rental houses is eliminated, the fire accidents caused by the overload operation are reduced or eliminated, and meanwhile, the power supply of the electric leakage appliance is turned off in advance and an alarm is given, so that the electricity utilization safety is ensured;
the control system and the control method are simple, have strong practicability, avoid the hidden trouble of heavy electric load, have wide application prospect and have higher social and economic benefits;
the invention only aims at specific high-power electric appliances, and does not influence the normal use of lighting, socket low-power electricity consumption and air conditioners.
drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
Fig. 1 is a block diagram of a rental-house security electricity control system based on a current control technique.
FIG. 2 is a circuit schematic of the current sensing and control module;
shown in the figure: u01 is a controller; u02 is a first optical coupler; u03 is a second optical coupler; u04 is a silicon rectifier bridge; u05 is a thyristor; u06 is a current transformer.
FIG. 3 is a diagram showing the relationship between the AC zero-crossing point pulse waveform and the SCR conduction angle control waveform;
Shown in the figure: the time intervals of the rising edge of the zero-crossing pulse, the second falling edge and the second rising edge are respectively marked as Ta and T, wherein T is the period of the alternating current signal, and Tc is the time interval from the zero crossing point; tb is the time delay from the rising edge of the alternating current zero-crossing detection pulse waveform to the rising edge of the thyristor conducting pulse.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
embodiment 1, refer to fig. 1 and 2, a rental-house safety electricity utilization control system based on a current control technology includes an entrance current detection unit, a master controller, a wireless data transmission unit, a multi-channel air switch, and a plurality of rental-house electricity utilization units; the house-entering current detection unit is respectively connected with the house-entering cable and the master controller, the master controller is connected with the wireless data transmission unit, and the house-entering current detection unit transmits the collected total current of the house-entering cable to the master controller; the house-entry cable is connected with each electric unit of the rental houses through a multi-path air switch. The electric unit of the rental house can comprise a lighting lamp, a socket, an air conditioner, an electric water heater and an electric water heater control unit, wherein the electric water heater control unit comprises a current detection and control module, a controller, a water temperature detection module, an electric leakage protection switch and a wireless data transmission unit; the illuminating lamp, the socket, the air conditioner and the current detection and control module are respectively connected with the multi-path air switch; the electric water heater is respectively connected with the current detection and control module and the water temperature detection module; the leakage protection switch is respectively connected with the current detection and control module, the controller and the electric water heater; the current detection and control module and the water temperature detection module are connected with the controller, and the controller is connected with the wireless data transmission unit.
The current detection and control module collects the real-time working current of the electric water heater and transmits the real-time working current to the controller; the water temperature detection module collects real-time water temperature information of the electric water heater and transmits the real-time water temperature information to the controller; the controller transmits the working current and water temperature information to the master controller through the wireless data transmission unit; the main controller determines the actual upper limit of the house-entering total current according to the house-entering total current detected by the house-entering current detection unit, and distributes the working current of each electric water heater of the rental houses by combining the real-time working current and the water temperature of the electric water heater of each electric unit of the rental houses so as to control the working state of high-power electric appliances in each rental house.
In this embodiment, the household current detection unit is located in the household distribution box. The master controller obtains the total power current through the home-entry current detection unit, obtains the real-time water temperature and the real-time working current of each electric water heater through the wireless data transmission network, reasonably controls the working current of each room electric water heater, and enables the home-entry total current to work in a safe range under the condition of not influencing the normal use of other electric appliances in each rental room.
In this embodiment, the master controller controls the electric water heater through an electric appliance working current control strategy, which specifically includes: the current detection and control module converts the control current distributed by the master controller into the conduction angle of the silicon controlled rectifier, obtains a conduction pulse control signal through a timer in the controller, and then controls the silicon controlled rectifier, so that the current of the electric water heater is controlled by controlling the conduction angle of the silicon controlled rectifier. The current detection and control module comprises a current-limiting resistor R6, a current-limiting resistor R8, a silicon rectifier bridge U04, a first optical coupler U03, a second optical coupler U02, a silicon controlled rectifier U05 and a current transformer; one end of a current-limiting resistor R6 is connected with a live wire of mains supply 220V alternating current, one end of a current-limiting resistor R8 is connected with a zero line of the mains supply 220V alternating current, the other end of a current-limiting resistor R6 and the other end of a current-limiting resistor R8 are connected with a silicon rectifier bridge U04, a silicon rectifier bridge U04 is connected with the input end of a first optical coupler U03, and the output end of the first optical coupler U03 is connected with an INT pin of a controller U01; the output end of the first optical coupler U03 is connected with a first pin of a second optical coupler U02 through a resistor R3, a first pin of the second optical coupler U02 is connected with a P1.0 pin of a controller U01 through a resistor R1, a second pin of the second optical coupler U02 is connected with a P1.0 pin of the controller U01 through a resistor R2, a third pin of the second optical coupler U02 is connected with a control electrode of a thyristor U05, a third pin of the second optical coupler U02 is further connected with a cathode of the thyristor U05 through a resistor R4, and a fourth pin of the second optical coupler U02 is connected with an anode of the thyristor U05 through a resistor R5; the anode of the controlled silicon U05 is connected with the zero line of the commercial power 220V alternating current; the cathode of the controlled silicon U05 is connected with one end of an electric water heater (load) through a current transformer U06, and the other end of the electric water heater (load) is connected with a live wire of commercial power 220V alternating current; the current transformer U06 is connected with one end of a resistor R10, the other end of the resistor R10 is connected with an ADC pin of the controller U01, the other end of the resistor R10 is grounded through a capacitor C1, and the other end of the resistor R10 is connected with a diode D1 and a diode D2 respectively. The 220V mains supply is connected with a first optocoupler U03 through current limiting resistors R6 and R8 and a bridge rectifier module U04; when the mains supply 220V alternating current is in the positive half cycle, a light emitting diode in the first optocoupler U03 is conducted to emit light, and low level is output; when the commercial power is in the negative half cycle of 220V alternating current, a light emitting diode in the first optocoupler U03 does not emit light, a high-level signal is output, the moment of the zero crossing point of the 220V alternating current voltage is obtained, and the signal is connected with the controller U01 and serves as a signal source of an external terminal of the controller; an accurate zero-crossing signal is obtained through further calculation of the zero-crossing signal, the control current distributed by the master controller is converted into a conduction angle of the controllable silicon, a conduction pulse signal is obtained through an internal timer, the conduction pulse signal is output to a first optocoupler U02 through a controller IO port P1.0, the controllable silicon U05 is controlled, and therefore the current on the electric water heater is controlled through controlling the size of the conduction angle; the current on the electric water heater (load) is converted into a voltage signal in a resistor R9 through a current transformer U06, the voltage signal is filtered by R10 and C1 to obtain direct current voltage, D1 and D2 limit the amplitude, and the direct current voltage is transmitted to an analog-to-digital converter (ADC) inside a controller U01 to obtain the current of the electric water heater (load).
In this embodiment, the working state of the electric water heater includes a shutdown state, a heat preservation state, a power-off use state, an energization use state, a heating state and an electric leakage state;
The shutdown state is that the water temperature is unchanged and the working current is zero within a certain time range;
the heat preservation state is that the water temperature change is not more than a certain value and the working current is less than a certain value within a certain time range;
the power-off use state is that the water temperature is reduced and the working current is zero within a certain time range;
The electrified use state is that the water temperature change is not more than a certain value and the working current is more than a certain value within a certain time range;
the heating state is that the water temperature rises within a certain time range, and the working current is greater than a certain value;
the leakage state is the condition that the working current is higher than the rated current of the electric water heater or the current is still existed when the conduction angle is zero.
the shutdown state, the heat preservation state and the power-off use state are all low-current or no-current states and have no power supply priority; the power-on use state is a water heater use state and has power supply priority; the heating state is a water heater preparation use state and has power supply priority; namely: preferentially ensuring that the electric water heater in a use state works normally; the working current of the electric water heater in a heating state is properly reduced, and the heating time is prolonged; and the power switch in the leakage state is turned off preferentially and an alarm is given.
in this embodiment, the wireless transmission adopts the ZigBee wireless sensor network, low-power consumption and can automatic network deployment, and data transmission is not influenced to arbitrary increase and decrease node.
a method for controlling the safe electricity utilization of the rental houses by adopting the safe electricity utilization control system of the rental houses based on the current control technology comprises the following steps: the current detection and control module of each electricity utilization unit of the rental houses collects the real-time working current of the electric water heater in real time and transmits the real-time working current to the controller, the water temperature detection module detects the water temperature of the electric water heater and transmits the water temperature to the controller, and the real-time working current and the water temperature of the controller are transmitted to the master controller through the wireless data transmission unit;
the master controller obtains the working state of the electric water heater according to the actual upper limit of the calculated total current of the house and the real-time working current and the water temperature of the electric water heater of each rental house electricity unit, and distributes the working current of each rental house electric water heater so as to control the working state of each electric water heater.
The working state of the electric water heater comprises a shutdown state, a heat preservation state, a power-off use state, a power-on use state, a heating state and an electric leakage state;
the shutdown state is that the water temperature is unchanged and the working current is zero within a certain time range;
the heat preservation state is that the water temperature change is not more than a certain value and the working current is less than a certain value within a certain time range;
the power-off use state is that the water temperature is reduced and the working current is zero within a certain time range;
the electrified use state is that the water temperature change is not more than a certain value and the working current is more than a certain value within a certain time range;
The heating state is that the water temperature rises within a certain time range, and the working current is greater than a certain value;
The electric water heater has power supply priority when in use; the electric water heater has a second priority when in a heating state;
The leakage state is the condition that the working current is higher than the rated current of the electric water heater or the current is still existed when the conduction angle is zero.
In this embodiment, the master controller controls the electric water heater through a fuzzy control strategy based on the working current of the electric water heater, and the step of calculating the working current of each electric water heater in the fuzzy control strategy is as follows:
If the total current is I0, N rooms are total, the electricity consumption of the basic electrical appliance in the nth room is Ibn, the electricity consumption of the electric water heater is Ihn, then the total current is I0
the upper limit IU of the total current I0 is IH-IF, wherein IH is the upper limit of the current entering the household, and IF is the full-load working current of a single electric water heater;
Therefore, the total current Ih available for the operation of the electric water heater is
The quantity of the electric water heaters in the electrified using state is p, the quantity of the electric water heaters in the heating state is q, and an equation set is provided:
in the formula, Ip is the working current of the electric water heater in a power-on use state, Iq is the working current of the electric water heater in a heating state, and IF is the full-load working current of a single electric water heater;
Considering the electricity priority of the electric water heater in the power-on use state, the electricity current is distributed as
I＝I/p≤I
Considering the preference of the electric water heater in the heating state, the electricity current is distributed as
I＝(I-pI)/q≤I。
The master controller controls the electric water heater through an electric appliance working current control strategy, and specifically comprises the following steps: the current detection and control module converts the control current distributed by the master controller into the conduction angle of the silicon controlled rectifier, obtains a conduction pulse control signal through a timer in the controller, and then controls the silicon controlled rectifier, so that the current of the electric water heater is controlled by controlling the conduction angle of the silicon controlled rectifier.
In this embodiment, the control of the working current of each electric water heater requires to control the conduction time of the thyristor, and then to obtain the zero-crossing detection of the alternating current, and then to calculate the conduction angle of the thyristor according to the preset current magnitude, and to control the conduction angle, the magnitude of the output voltage is controlled, that is, the magnitude of the working current is controlled. That is, as shown in fig. 2, since the ac mains supply is affected by the grid, load variation and interference, it is not accurate enough to detect the zero crossing point of the mains supply by a simple circuit, and further processing is required to obtain the precise zero crossing point of the mains supply. As shown in fig. 3, since the reference voltage value is greater than zero, the rising edge of the actual zero-crossing detection waveform leads the actual zero-crossing point, the rising edge of the zero-crossing detection waveform is used as a reference, the controller is triggered to count, and the time intervals of the second falling edge and the second rising edge are recorded as Ta and T, respectively, where T is the period of the ac signal, and the time interval Tc from the zero-crossing point is equal to
let the conduction angle be theta, and the corresponding time delay be the delay time Tb set for the controller
considering that the load resistance of the electric water heater is fixed, the output voltage, namely the working current, is controlled by controlling the conduction angle theta; the relationship between the conduction angle theta and the output voltage U0 is
in the formula: ui is power supply voltage, residential electricity consumption is 220V, and phi is the phase of the voltage waveform.
the control system and the control method can also be used for controlling the current of other high-power electrical appliances except the electric water heater, and the water temperature of the high-power electrical appliances is detected without arranging a water temperature detection module. Namely: a rental house safety electricity utilization control system based on a current control technology comprises an entrance current detection unit, a master controller, a wireless data transmission unit and a plurality of rental house electricity utilization units; the plurality of electricity using units for the rental houses are connected with the household current detection unit through the multi-path air switches; each electricity utilization unit of the rental houses comprises a current detection and control module, a controller, an electric leakage protection switch and a wireless data transmission unit, wherein the electric leakage protection switch is respectively connected with the current detection and control module, the controller and a high-power electric appliance; the current detection and control module collects real-time working current of each high-power electric appliance in real time and transmits the real-time working current to the controller, and the controller transmits the real-time working current to the master controller through the wireless data transmission unit; the main controller determines the actual upper limit of the house-entry total current according to the house-entry total current detected by the house-entry current detection unit, and distributes the working current of the high-power electric appliances of each rental house by combining the real-time working current of the high-power electric appliances of each rental house electric unit so as to control the working state of the high-power electric appliances in each rental house. And the master controller distributes the working current of each high-power electric appliance of the rental houses according to the calculated actual upper limit of the total current of the house and the real-time working current of the high-power electric appliances of the electricity utilization units of the rental houses so as to control the working state of each high-power electric appliance.
the method cannot obtain an accurate current distribution value, but the current distribution value can be continuously adjusted to obtain an optimal control strategy due to the consideration of the power utilization priority. Because a certain electricity utilization habit exists in the user, the control system reasonably distributes the current magnitude by combining the electricity utilization, so that a proper optimal current distribution strategy is obtained, and the electricity utilization habits of different users are also met.
the invention has the following advantages:
has stronger adaptability
predicting the working state of the high-power electrical appliance according to the change of current parameters (the electric water heater also comprises temperature parameters) of the high-power electrical appliance, and distributing current according to the working state;
low cost
By adopting the wireless sensor network, data acquisition and current distribution of different rooms are transmitted through the wireless sensor network without power line transmission or wired transmission;
safety feature
By collecting and distributing the power utilization current of all electrical appliances, the total current is ensured not to exceed the standard, and a margin is left; when sudden power utilization current sharply increases, the system responds in time and redistributes the current to ensure that the total current does not exceed the standard; monitoring and alarming the leakage state in advance;
Humanization
by classifying the use of the electric water heater into 4 states, the priority use of users who need to use the electric water heater is ensured.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (3)
1. The safe electricity utilization control method for the rental houses, which adopts the safe electricity utilization control system for the rental houses based on the current control technology, is characterized in that the safe electricity utilization control system for the rental houses based on the current control technology comprises an in-house current detection unit, a master controller and a plurality of electricity utilization units for the rental houses; the plurality of electricity using units for the rental houses are connected with the household current detection unit through the multi-path air switches; each electricity utilization unit of the rental houses comprises a current detection and control module, an electric leakage protection switch, a controller and a wireless data transmission unit, wherein the electric leakage protection switch is respectively connected with the current detection and control module, the controller and a high-power electric appliance; the current detection and control module collects the working current of each high-power electric appliance in real time and transmits the working current to the controller, and the controller transmits the working current to the master controller in a wireless manner; the master controller determines the actual upper limit of the house-entry total current according to the house-entry total current detected by the house-entry current detection unit, and distributes the working current of the high-power electric appliance of each rental house by combining the real-time working current of the high-power electric appliance of each rental house electric unit so as to control the working state of the high-power electric appliance in each rental house; the current detection and control module comprises a silicon controlled rectifier and a current transformer, converts the control current distributed by the master controller into a conduction angle of the silicon controlled rectifier, obtains a conduction pulse signal through an internal timer, and controls the silicon controlled rectifier, so that the current of the high-power electric appliance is controlled by controlling the conduction angle of the silicon controlled rectifier;
the method comprises the following steps: the current detection and control module of each electricity using unit of the rental house collects the real-time working current of the high-power electric appliance in real time and transmits the real-time working current to the controller; the controller wirelessly transmits the real-time working current to the master controller; the master controller distributes the working current of each high-power electric appliance of the rental houses according to the actual upper limit of the calculated household total current and the real-time working current of the high-power electric appliance of each electricity using unit of the rental houses so as to control the working state of each high-power electric appliance;
when the high-power device is an electric water heater, the water temperature detection module detects the water temperature of the electric water heater and wirelessly transmits the water temperature to the master controller through the controller; the master controller obtains the working state of the electric water heater according to the real-time working current of the electric water heater of each rental house and the water temperature of the electric water heater, and returns a corresponding current control instruction to control the working current of the electric water heater;
The working state of the electric water heater comprises a shutdown state, a heat preservation state, a power-off use state, an electrifying use state, a heating state and an electric leakage state;
The shutdown state is that the water temperature is unchanged and the working current is zero within a certain time range;
The heat preservation state is that the water temperature change is not more than a certain value and the working current is less than a certain value within a certain time range;
The power-off use state is that the water temperature is reduced and the working current is zero within a certain time range;
The electrified use state is that the water temperature change is not more than a certain value and the working current is more than a certain value within a certain time range;
The heating state is that the water temperature rises within a certain time range, and the working current is greater than a certain value;
the electric leakage state is the condition that the working current is higher than the rated current of the electric water heater or the current still exists when the conduction angle is zero;
the master controller controls the electric water heater through a fuzzy control strategy based on the working current of the electric water heater, and the step of calculating the working current of each electric water heater in the fuzzy control strategy is as follows:
if the total current is I0, N rooms are total, the electricity consumption of the basic electrical appliance in the nth room is Ibn, the electricity consumption of the electric water heater is Ihn, then the total current is I0
The upper limit IU of the total current I0 is IH-IF, wherein IH is the upper limit of the current entering the household, and IF is the full-load working current of a single electric water heater;
therefore, the total current Ih available for the operation of the electric water heater is
I＝I-∑I
the quantity of the electric water heaters in the electrified using state is p, the quantity of the electric water heaters in the heating state is q, and an equation set is provided:
In the formula, Ip is the working current of the electric water heater in a power-on use state, Iq is the working current of the electric water heater in a heating state, and IF is the full-load working current of a single electric water heater;
considering the electricity priority of the electric water heater in the power-on use state, the electricity current is distributed as
I＝I/p≤I
Considering the preference of the electric water heater in the heating state, the electricity current is distributed as
I＝(I-pI)/q≤I。
2. the rental-house safe electricity-consumption control method using the rental-house safe electricity-consumption control system based on the current control technology according to claim 1, characterized in that: the master controller controls the electric water heater through an electric appliance working current control strategy, and specifically comprises the following steps: the current detection and control module converts the control current distributed by the master controller into the conduction angle of the silicon controlled rectifier, obtains a conduction pulse signal through an internal timer, and then controls the silicon controlled rectifier, so that the current of the electric water heater is controlled by controlling the conduction angle of the silicon controlled rectifier.
3. the rental-house safe electricity-consumption control method using the rental-house safe electricity-consumption control system based on the current control technology according to claim 1, characterized in that: the master controller calculates and reasonably distributes current according to the working state of the electric water heater, and the electric water heater in the electric leakage state preferentially turns off a power switch and gives an alarm; the electric water heater is in a power-on use state and has power supply priority; the electric water heater is in a heating state and has a second priority.
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| CN203151220U (en) * | 2013-03-01 | 2013-08-21 | 浙江交通职业技术学院 | Intelligent power management system for student apartments |
| CN203377678U (en) * | 2013-05-23 | 2014-01-01 | 李吉玉 | Intelligent controller for safe use of electricity in dormitory |
| CN104216307A (en) * | 2013-05-31 | 2014-12-17 | 沁园集团股份有限公司 | Home electricity distribution control system and method |
| CN204538485U (en) * | 2015-02-09 | 2015-08-05 | 上海中锦建设集团股份有限公司 | A kind of construction site limit load automatic control electricity-saving type dormitory distribution system |
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| CN203151220U (en) * | 2013-03-01 | 2013-08-21 | 浙江交通职业技术学院 | Intelligent power management system for student apartments |
| CN203377678U (en) * | 2013-05-23 | 2014-01-01 | 李吉玉 | Intelligent controller for safe use of electricity in dormitory |
| CN104216307A (en) * | 2013-05-31 | 2014-12-17 | 沁园集团股份有限公司 | Home electricity distribution control system and method |
| CN204538485U (en) * | 2015-02-09 | 2015-08-05 | 上海中锦建设集团股份有限公司 | A kind of construction site limit load automatic control electricity-saving type dormitory distribution system |
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