CN115276024A - Automatic scheduling system of electric power prefabricated cabin - Google Patents
Automatic scheduling system of electric power prefabricated cabin Download PDFInfo
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- CN115276024A CN115276024A CN202211169102.7A CN202211169102A CN115276024A CN 115276024 A CN115276024 A CN 115276024A CN 202211169102 A CN202211169102 A CN 202211169102A CN 115276024 A CN115276024 A CN 115276024A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The invention relates to the technical field of electric prefabricated cabins, in particular to an automatic scheduling system of an electric prefabricated cabin, which comprises a detection module, a variable resistor, a power-off protection device, a fault alarm device and a central control module, wherein the central control module is used for adjusting the output voltage of the electric prefabricated cabin according to the detection result of the detection module, the central control module calculates a power supply balance parameter S according to historical data of power utilization parameters and sets the output voltage of the electric prefabricated cabin according to the power supply balance parameter S, when the electric prefabricated cabin runs, the central control module judges whether the actual voltage U in a power transmission line is normal or not according to the detection result of the detection module, and adjusts the voltage when the central control module judges that the voltage exceeds a normal range.
Description
Technical Field
The invention relates to the technical field of electric prefabricated cabins, in particular to an automatic dispatching system of an electric prefabricated cabin.
Background
The prefabricated cabin is an outdoor intelligent substation which is launched by a national power grid on the basis of the core concept of 'standard distribution type'. Therefore, it can be seen that this is also a box substation, and intelligence is one of its features.
With the acceleration of the construction pace of the intelligent power grid in China, the situation that the construction speed of the transformer substation is relatively lagged needs to be changed, and the construction period of the intelligent transformer substation needs to be accelerated. By adopting the scheme of standardization, factory processing and assembly type construction, popularization and application of the intelligent substation, namely the prefabricated cabin, are realized. Therefore, another name of the prefabricated cabin is a fabricated intelligent substation. The appearance of the transformer substation changes and optimizes the layout of the traditional transformer substation and the traditional box transformer substation, so that the transformer substation can be used for distribution in a wider range.
The power grid dispatching is used as an important component of a prefabricated cabin power system, and more reliable guarantee is provided for the realization of an automatic control technology and the operation stability of the power system by the power grid dispatching. At present, the national grid dispatching can be divided into five levels, namely national grid dispatching, large-area grid dispatching, provincial grid dispatching, regional grid dispatching and county grid dispatching according to the range size. The information in the field of automation of production of the electric prefabricated cabin is integrated, an automatic information integration platform is established, real-time data sharing is achieved, the data transmission rate is guaranteed, the technical specification of an automation system is formulated in a prefabricated cabin electric power system, and the stability and continuity of internal equipment are guaranteed.
Chinese patent publication No.: CN114091968A discloses an automatic scheduling method and system for an intelligent power grid, and the disclosed technical scheme includes a basic environment, information collection, an auxiliary decision and a scheduling command. According to the automatic scheduling method for the intelligent power grid, the key information required by emergency processing decision is combined and intensively presented in the command center through filtering and screening the basic information, so that the command decision personnel of the command center can take the effect as decision and scheduling basis, and the effect of audio and video communication interaction between the command center and the monitoring front end, the individual soldier terminal and the vehicle-mounted terminal through the emergency command platform is achieved through setting communication guarantee.
However, in the operation process of the power system, especially in some industrial areas or areas with large-scale equipment, the situation that the power load is suddenly increased or decreased often occurs, which causes a certain impact on the power system and causes unstable power supply, and the dynamic balance of the power network cannot be ensured in the prior art.
Disclosure of Invention
Therefore, the invention provides an automatic dispatching system of an electric prefabricated cabin, which is used for solving the problem that the dynamic balance of an electric network cannot be ensured in the prior art.
In order to achieve the above object, the present invention provides an automatic dispatching system for electric prefabricated cabins, comprising:
the detection module comprises a voltage inductor and a temperature sensor, wherein the voltage inductor is used for detecting the output voltage of the electric power prefabricated cabin in real time, and the temperature sensor is used for detecting the temperature of the electric transmission line in real time;
the variable resistor is arranged in a power transmission line of the electric prefabricated cabin, and the voltage value in the power transmission line is adjusted through the opening and closing of the variable resistor;
the power-off protection device is arranged in the power transmission line of the electric power prefabricating cabin and is used for performing power-off protection on the power transmission line when the detection result of the detection module exceeds a preset value;
the fault alarm device is connected with the power-off protection device and is used for giving a fault alarm after the power-off protection device is started;
the central control module is used for adjusting the output voltage of the electric prefabricated cabin according to the detection result of the detection module, calculating a power supply balance parameter S according to historical data of power consumption parameters and setting the output voltage of the electric prefabricated cabin according to the power supply balance parameter S, when the electric prefabricated cabin operates, the central control module judges whether the actual voltage U in the electric transmission line is normal according to the detection result of the detection module, meanwhile, drawing a load change curve graph of the electric prefabricated cabin in the past year according to historical data of power consumption in the coverage range of the electric prefabricated cabin, when the central control module judges that the voltage is in a normal range, a load value corresponding to the current date in the load change curve graph is obtained, calculating a curve slope k of a corresponding point of the load value, adjusting the output voltage of the electric prefabricated cabin according to the curve k, and adjusting the resistance value of the central control module according to the current date, when the central control module judges that the voltage exceeds the normal range, if the actual voltage U is too high, the central control module calculates a resistance value of an adjusting point, and controls the resistance adjusting module to adjust the temperature T and controls the variable resistor to output temperature T if the temperature adjusting module is not started, and the detection module detects the temperature T.
Further, the central control module obtains historical data of power consumption parameters in the coverage range of the electric prefabricated cabin, wherein the power consumption parameters comprise voltage, current and power consumption, extracts the highest voltage value Umax, the highest current value Imax and the highest power consumption value Qmax in the past year, calculates a power supply balance parameter S through the following formula, and sets power supply balance parameters
Wherein, U0 is a preset standard voltage, I0 is a preset standard current,
the power consumption is a predetermined standard.
Furthermore, a first preset contrast parameter S1 and a second preset contrast parameter S2 are arranged in the central control module, wherein S1 is more than 0 and less than 1 and S2 is more than 1.5, when the central control module adjusts the output voltage of the electric power prefabricated cabin to a corresponding value according to the power supply balance parameter S,
when S is larger than or equal to S2, the central control module determines the output voltage of the electric prefabricated cabin as
；
When S1 is larger than or equal to S and smaller than S2, the central control module determines the output voltage of the electric prefabricated cabin as
；
When S is less than S1, the central control module determines the output voltage of the electric prefabricated cabin as
。
Further, after the central control module finishes adjusting the output voltage of the electric power prefabrication cabin, when the electric power prefabrication cabin runs, the central control module detects the actual voltage U in the electric transmission line, the central control module compares U with the output voltage U1 of the electric power prefabrication cabin,
when U = U1, the central control module judges that the voltage is normal;
and when U is not equal to U1, the central control module preliminarily judges that the voltage is abnormal.
Further, when the central control module preliminarily determines that the voltage is abnormal, the difference value delta U between U and U1 is calculated, delta U = | U-U1| is set, the central control module compares the delta U with the standard voltage difference value delta Ub,
when the delta U is less than or equal to the delta Ub, the central control module judges that the voltage is in a normal range;
and when the delta U is larger than the delta Ub, the central control module judges that the voltage exceeds a normal range.
Furthermore, the central control module draws a load change curve graph of the prefabricated electric power cabin in the past year according to historical data of the power consumption in the coverage range of the prefabricated electric power cabin, when the central control module judges that the voltage is in a normal range, the output voltage of the prefabricated electric power cabin is adjusted in real time according to the slope of the load change curve, when the output voltage of the prefabricated electric power cabin is adjusted in real time, the central control module corresponds the current date to the same date in the past year, the central control module adjusts the load value corresponding to the current date in the load change curve graph, calculates the slope k of the curve at the corresponding point of the load value, and compares | k | with a first preset curve slope k1 and a second preset curve slope k2,
when | k | is less than or equal to k1, the central control module selects e1 to adjust the output voltage of the electric power prefabrication cabin to a corresponding value;
when k1 is less than | k | ≦ k2, the central control module selects the output voltage of the electric power prefabricated cabin of e2 to adjust to a corresponding value;
when k2 is less than | k |, the central control module selects e3 to adjust the output voltage of the electric power prefabricated cabin to a corresponding value;
wherein e1 is a first output voltage regulating coefficient, e2 is a second output voltage regulating coefficient, and e3 is a third output voltage regulating coefficient, wherein k1 is greater than 0 and less than k2, and e1 is greater than 0.1 and less than e2 and less than e3 and less than 0.3 are set;
when the central control module selects ei to adjust the output voltage of the electric prefabricated cabin to a corresponding value, setting i =1,2,3, recording the adjusted output voltage as U1',
when k > 0, set U1' = U1 × (1 + ei);
when k < 0, set U1' = U1 × (1-ei).
Further, when the central control module judges that the voltage exceeds the normal range, if U is larger than U1, the central control module judges that the actual voltage U is too high, the central control module controls the variable resistor to start so as to adjust the output voltage of the electric prefabricated cabin, the central control module calculates a resistance adjustment parameter F, and the resistance adjustment parameter F is set
Wherein, k' is the slope of the curve corresponding to the current time, k1 is the slope of the first preset curve, and k2 is the slope of the second preset curve.
Furthermore, a first resistance adjustment contrast parameter F1 and a second resistance adjustment contrast parameter F2 are arranged in the central control module, wherein F1 is less than F2, when the central control module adjusts the starting resistance value of the variable resistor to a corresponding value according to the resistance adjustment parameter F,
when F is less than or equal to F1, the central control module adjusts the starting resistance value of the variable resistor to
；
When F1 < F ≦ F2, the centering module adjusting the enabled resistance value of the variable resistor to R = F × R0 × (1 + α 1);
when F2 is less than F, the central control module starts the power-off protection device to carry out power-off protection, and starts the fault alarm device to give an alarm;
wherein R0 is a preset standard starting resistance value, alpha 1 is a conversion coefficient, and alpha 1 is more than 0 and less than 0.1.
Furthermore, the central control module is provided with a circuit critical temperature T0, when the central control module judges that the voltage exceeds the normal range, if U is less than U1, the central control module judges that the actual voltage U is too low, the central control module controls the detection module to detect the circuit temperature T, the central control module compares T with T0,
when T is less than T0, the central control module determines that the temperature does not exceed the critical temperature of the circuit and corrects the output voltage of the electric prefabricated cabin according to delta U;
and when T is more than or equal to T0, the central control module judges that the temperature exceeds the critical temperature of the circuit, starts the power-off protection device for power-off protection, and simultaneously starts the fault alarm device for alarming.
Further, a first preset voltage difference value delta U1 and a second preset voltage difference value delta U2 are arranged in the central control module, wherein delta U1 is smaller than delta U2, when the central control module determines that the temperature does not exceed the critical temperature of the circuit and corrects the output voltage of the electric prefabricated cabin according to delta U, the central control module respectively compares the delta U with the delta U1 and the delta U2,
when the delta U is less than or equal to the delta U1, the central control module corrects the output voltage of the electric prefabricated cabin into U2 and sets
；
When delta U1 is larger than delta U and is smaller than or equal to delta U2, the central control module corrects the output voltage of the electric prefabricated cabin into U2 and sets
；
When delta U2 is less than delta U, the central control module will controlCorrecting the output voltage of the electric prefabricated cabin to be U2, and setting
；
Wherein the content of the first and second substances,
1 is the first output voltage too small correction factor,
2 is the second output voltage too small correction factor,
3 is the over-small correction coefficient of the third output voltage, 1.1 < (R) >
1＜
2＜
3＜1.3。
Compared with the prior art, the power supply balancing method has the advantages that when the output voltage of the power prefabricated cabin is set, historical data of power utilization parameters in the coverage range of the power prefabricated cabin are firstly obtained, the power supply balancing parameter S is calculated according to the obtained historical data, the output voltage of the power prefabricated cabin is calculated by the central control module according to the power supply balancing parameter S, and the setting of the output voltage is guided through the historical data so as to maintain the dynamic balance of the whole power utilization network.
Furthermore, the detection module is arranged to detect the actual voltage in the power transmission line in real time and transmit the detection result to the central control module, the central control module judges whether the actual voltage U in the power transmission line is normal or not according to the detection result of the detection module, and the output voltage is adjusted when the actual voltage is judged to be beyond the normal range, so that the power transmission line fault caused by voltage abnormity is avoided, and the dynamic balance of a power utilization network is further ensured.
Furthermore, the control module of the invention draws a load change curve chart of the prefabricated electric power cabin in the past year according to historical data of the power consumption in the coverage range of the prefabricated electric power cabin, and adjusts the output voltage of the prefabricated electric power cabin in real time according to the slope of the curve when the control module judges that the voltage is in the normal range, thereby avoiding the situation of insufficient power supply or overlarge instantaneous current change caused by sudden load change, and pre-judging and adjusting the voltage change situation in advance according to the load change situation in the historical data, thereby further ensuring the dynamic balance of the power utilization network.
Further, when the central control module judges that the voltage exceeds the normal range, if the actual voltage U is too high, the central control module calculates a resistance adjusting parameter F and adjusts the starting resistance value of the variable resistor according to the resistance adjusting parameter F, so that the line fault caused by the too high voltage is avoided, and the dynamic balance of the power utilization network is further ensured.
Further, when the central control module judges that the voltage exceeds the normal range, if the actual voltage U is too low, the central control module controls the detection module to detect the circuit temperature T and corrects the output voltage according to the delta U when the actual voltage U does not exceed the preset value, so that the line fault caused by line temperature accumulation due to too low voltage is avoided, and the dynamic balance of the power utilization network is further ensured.
Drawings
Fig. 1 is a block diagram of an automatic scheduling system of a power prefabricated cabin according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and do not delimit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principles of the present invention, and do not limit the scope of the present invention.
Fig. 1 is a block diagram of an automatic dispatching system for a prefabricated electric power cabin according to an embodiment of the present invention.
The automatic dispatching system of the electric prefabricated cabin comprises:
the detection module comprises a voltage inductor and a temperature sensor, wherein the voltage inductor is used for detecting the output voltage of the electric power prefabricated cabin in real time, and the temperature sensor is used for detecting the temperature of the electric transmission line in real time;
the variable resistor is arranged in a power transmission line of the electric power prefabricated cabin, and the voltage value in the power transmission line is adjusted through the opening and closing of the variable resistor;
the power-off protection device is arranged in the power transmission line of the electric power prefabricating cabin and is used for performing power-off protection on the power transmission line when the detection result of the detection module exceeds a preset value;
the fault alarm device is connected with the power-off protection device and is used for giving a fault alarm after the power-off protection device is started;
the central control module is used for adjusting the output voltage of the electric prefabricated cabin according to the detection result of the detection module, calculating a power supply balance parameter S according to historical data of power consumption parameters and setting the output voltage of the electric prefabricated cabin according to the power supply balance parameter S, when the electric prefabricated cabin operates, the central control module judges whether the actual voltage U in the electric transmission line is normal according to the detection result of the detection module, meanwhile, drawing a load change curve graph of the electric prefabricated cabin in the past year according to historical data of power consumption in the coverage range of the electric prefabricated cabin, when the central control module judges that the voltage is in a normal range, a load value corresponding to the current date in the load change curve graph is obtained, calculating a curve slope k of a corresponding point of the load value, adjusting the output voltage of the electric prefabricated cabin according to the curve k, and adjusting the resistance value of the central control module according to the current date, when the central control module judges that the voltage exceeds the normal range, if the actual voltage U is too high, the central control module calculates a resistance value of an adjusting point, and controls the resistance adjusting module to adjust the temperature T and controls the variable resistor to output temperature T if the temperature adjusting module is not started, and the detection module detects the temperature T.
Specifically, the central control module obtains historical data of electricity utilization parameters in the coverage range of the electric prefabricated cabin, wherein the electricity utilization parameters comprise voltage, current and electricity consumption, extracts the highest voltage value Umax, the highest current value Imax and the highest electricity consumption value Qmax in the past year, calculates a power supply balance parameter S through the following formula, and sets power supply balance parameters S
Wherein U0 is a preset standard voltage, I0 is a preset standard current,
the power consumption is a preset standard.
Specifically, a first preset contrast parameter S1 and a second preset contrast parameter S2 are arranged in the central control module, wherein S1 is more than 0 and less than 1 and S2 is more than 1.5, when the central control module adjusts the output voltage of the electric power prefabricated cabin to a corresponding value according to the power supply balance parameter S,
when S is larger than or equal to S2, the central control module determines the output voltage of the electric prefabricated cabin as
；
When S1 is larger than or equal to S and smaller than S2, the central control module determines the output voltage of the electric prefabricated cabin as
；
When S is less than S1, the central control module determines the output voltage of the electric prefabricated cabin as
。
When the output voltage of the electric prefabricated cabin is set, the historical data of the electric parameters in the coverage range of the electric prefabricated cabin is firstly acquired, the power supply balance parameter S is calculated according to the acquired historical data, and the central control module calculates the output voltage of the electric prefabricated cabin according to the power supply balance parameter S.
Specifically, after the central control module finishes adjusting the output voltage of the electric power prefabricated cabin, when the electric power prefabricated cabin runs, the central control module detects the actual voltage U in the electric transmission line, the central control module compares U with the output voltage U1 of the electric power prefabricated cabin,
when U = U1, the central control module judges that the voltage is normal;
and when U is not equal to U1, the central control module preliminarily judges that the voltage is abnormal.
According to the invention, the detection module is arranged to detect the actual voltage in the power transmission line in real time, and the detection result is transmitted to the central control module, the central control module judges whether the actual voltage U in the power transmission line is normal or not according to the detection result of the detection module, and adjusts the output voltage when the actual voltage is judged to exceed the normal range, so that the power transmission line fault caused by abnormal voltage is avoided, and the dynamic balance of the power utilization network is further ensured.
Specifically, when the central control module preliminarily determines that the voltage is abnormal, the difference value Δ U between U and U1 is calculated, Δ U = | U-U1|, the central control module compares Δ U with the standard voltage difference value Δ Ub,
when the delta U is less than or equal to the delta Ub, the central control module judges that the voltage is in a normal range;
and when the delta U is larger than the delta Ub, the central control module judges that the voltage exceeds a normal range.
Specifically, the central control module draws a load change curve graph of the prefabricated electric power cabin in the past year according to historical data of power consumption in the coverage range of the prefabricated electric power cabin, when the central control module judges that the voltage is in a normal range, the output voltage of the prefabricated electric power cabin is adjusted in real time according to the slope of the curve, when the output voltage of the prefabricated electric power cabin is adjusted in real time, the central control module corresponds the current date to the same date in the past year, the central control module adjusts the load value corresponding to the current date in the load change curve graph, calculates the slope k of the curve of the corresponding point of the load value, and compares the slope k with a first preset curve slope k1 and a second preset curve slope k2,
when | k | is less than or equal to k1, the central control module selects e1 to adjust the output voltage of the electric power prefabrication cabin to a corresponding value;
when k1 is less than | k | and less than or equal to k2, the central control module selects the output voltage of the e2 electric power prefabricated cabin to adjust to a corresponding value;
when k2 is less than | k |, the central control module selects e3 to adjust the output voltage of the electric power prefabricated cabin to a corresponding value;
wherein e1 is a first output voltage regulating coefficient, e2 is a second output voltage regulating coefficient, and e3 is a third output voltage regulating coefficient, wherein k1 is greater than 0 and less than k2, and e1 is greater than 0.1 and less than e2 and less than e3 and less than 0.3 are set;
when the central control module selects ei to adjust the output voltage of the electric prefabricated cabin to a corresponding value, setting i =1,2,3, recording the adjusted output voltage as U1',
when k > 0, set U1' = U1 × (1 + ei);
when k < 0, set U1' = U1 × (1-ei).
It should be understood that a year in this embodiment refers to a natural year.
According to the method, a control module draws a load change curve chart of the prefabricated electric power cabin in the past year according to historical data of power consumption in the coverage range of the prefabricated electric power cabin, and adjusts the output voltage of the prefabricated electric power cabin in real time according to the slope of the curve when the control module judges that the voltage is in a normal range, so that the condition of insufficient power supply or excessive instantaneous current change caused by sudden load change is avoided, the change condition of the voltage is pre-judged and adjusted in advance according to the change condition of the load in the historical data, and the dynamic balance of a power utilization network is further ensured.
Specifically, when the central control module judges that the voltage exceeds a normal range, if U is larger than U1, the central control module judges that the actual voltage U is too high, the central control module controls the variable resistor to start so as to adjust the output voltage of the electric prefabricated cabin, the central control module calculates a resistance adjusting parameter F, and sets the resistance adjusting parameter F
Wherein, k' is the slope of the curve corresponding to the current time, k1 is the slope of the first preset curve, and k2 is the slope of the second preset curve.
Specifically, the central control module is provided with a first resistance adjustment comparison parameter F1 and a second resistance adjustment comparison parameter F2, wherein F1 is less than F2, when the central control module adjusts the starting resistance value of the variable resistor to a corresponding value according to the resistance adjustment parameter F,
when F is less than or equal to F1, the central control module adjusts the starting resistance value of the variable resistor to
；
When F1 < F ≦ F2, the central control module adjusting an enabled resistance value of the variable resistor to R = F × R0 × (1 + α 1);
when F2 is less than F, the central control module starts the power-off protection device to carry out power-off protection, and starts the fault alarm device to give an alarm;
wherein R0 is a preset standard starting resistance value, alpha 1 is a conversion coefficient, and alpha 1 is more than 0 and less than 0.1.
When the central control module judges that the voltage exceeds the normal range, if the actual voltage U is too high, the central control module calculates a resistance adjusting parameter F and adjusts the starting resistance value of the variable resistor according to the resistance adjusting parameter F, so that the line fault caused by the too high voltage is avoided, and the dynamic balance of the power utilization network is further ensured.
Specifically, the central control module is provided with a circuit critical temperature T0, when the central control module judges that the voltage exceeds a normal range, if U is less than U1, the central control module judges that the actual voltage U is too low, the central control module controls the detection module to detect the circuit temperature T, the central control module compares T with T0,
when T is less than T0, the central control module determines that the temperature does not exceed the critical temperature of the circuit and corrects the output voltage of the electric prefabricated cabin according to delta U;
and when T is more than or equal to T0, the central control module judges that the temperature exceeds the critical temperature of the circuit, starts the power-off protection device for power-off protection, and simultaneously starts the fault alarm device for alarming.
Specifically, a first preset voltage difference value delta U1 and a second preset voltage difference value delta U2 are arranged in the central control module, wherein delta U1 is smaller than delta U2, when the central control module determines that the temperature does not exceed the critical temperature of the circuit and corrects the output voltage of the electric power prefabricated cabin according to delta U, the central control module respectively compares delta U with delta U1 and delta U2,
when the delta U is less than or equal to the delta U1, the central control module corrects the output voltage of the electric prefabricated cabin into U2 and sets
；
When delta U1 is larger than delta U and is smaller than or equal to delta U2, the central control module corrects the output voltage of the electric prefabricated cabin into U2 and sets
；
When delta U2 is less than delta U, the central control module corrects the output voltage of the electric prefabricated cabin into U2 and sets
；
Wherein the content of the first and second substances,
1 is a first output voltage too small correction coefficient,
2 is the second output voltage too small correction factor,
3 is the over-small correction coefficient of the third output voltage, 1.1 < (R) >
1＜
2＜
3＜1.3。
According to the invention, when the central control module judges that the voltage exceeds the normal range, if the actual voltage U is too low, the control module controls the detection module to detect the circuit temperature T and corrects the output voltage according to the delta U when the actual voltage U does not exceed the preset value, so that the line fault caused by line temperature accumulation due to too low voltage is avoided, and the dynamic balance of the power utilization network is further ensured.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can be within the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An automatic scheduling system of an electric prefabricated cabin is characterized by comprising:
the detection module comprises a voltage sensor for detecting the output voltage of the electric prefabricated cabin in real time and a temperature sensor for detecting the temperature of the electric transmission line in real time;
the variable resistor is arranged in a power transmission line of the electric power prefabricated cabin, and the voltage value in the power transmission line is adjusted through the opening and closing of the variable resistor;
the power-off protection device is arranged in the power transmission line of the electric power prefabricating cabin and is used for performing power-off protection on the power transmission line when the detection result of the detection module exceeds a preset value;
the fault alarm device is connected with the power-off protection device and is used for giving a fault alarm after the power-off protection device is started;
the central control module is used for adjusting the output voltage of the electric prefabricated cabin according to the detection result of the detection module, calculating a power supply balance parameter S according to historical data of power consumption parameters and setting the output voltage of the electric prefabricated cabin according to the power supply balance parameter S, when the electric prefabricated cabin operates, the central control module judges whether the actual voltage U in the electric transmission line is normal according to the detection result of the detection module, meanwhile, drawing a load change curve graph of the electric prefabricated cabin in the past year according to historical data of power consumption in the coverage range of the electric prefabricated cabin, when the central control module judges that the voltage is in a normal range, a load value corresponding to the current date in the load change curve graph is obtained, calculating a curve slope k of a corresponding point of the load value, adjusting the output voltage of the electric prefabricated cabin according to the curve k, and adjusting the resistance value of the central control module according to the current date, when the central control module judges that the voltage exceeds the normal range, if the actual voltage U is too high, the central control module calculates a resistance value of an adjusting point, and controls the resistance adjusting module to adjust the temperature T and controls the variable resistor to output temperature T if the temperature adjusting module is not started, and the detection module detects the temperature T.
2. The automatic scheduling system of the electric prefabricated cabin as claimed in claim 1, wherein the central control module obtains historical data of electricity utilization parameters within a coverage range of the electric prefabricated cabin, the electricity utilization parameters comprise voltage, current and electricity consumption, extracts a highest voltage value Umax, a highest current value Imax and a highest electricity consumption value Qmax in the past year, calculates a power supply balance parameter S through the following formula, and sets the power supply balance parameter S
Wherein U0 is a preset standard voltage, I0 is a preset standard current,
the power consumption is a preset standard.
3. The automatic dispatching system of the electric prefabricated cabin, as claimed in claim 2, wherein the central control module is provided with a first preset comparison parameter S1 and a second preset comparison parameter S2, wherein S1 is more than 0 and less than 1 and S2 is less than 1.5, when the central control module adjusts the output voltage of the electric prefabricated cabin to a corresponding value according to the power supply balance parameter S,
when S is larger than or equal to S2, the central control module determines the output voltage of the electric prefabricated cabin as
；
When S1 is more than or equal to S and less than S2, the central control module determines the output voltage of the electric prefabricated cabin as
；
When S is less than S1, the central control module determines the output voltage of the electric prefabricated cabin as
。
4. The automatic dispatching system of the electric power prefabricated cabin, according to claim 3, is characterized in that after the central control module finishes the regulation of the output voltage of the electric power prefabricated cabin, the central control module detects the actual voltage U in the electric transmission line when the electric power prefabricated cabin runs, the central control module compares U with the output voltage U1 of the electric power prefabricated cabin,
when U = U1, the central control module judges that the voltage is normal;
and when U is not equal to U1, the central control module preliminarily judges that the voltage is abnormal.
5. The automatic dispatching system of the electric prefabricated cabin, as claimed in claim 4, wherein when the central control module preliminarily determines the voltage is abnormal, the difference Δ U between U and U1 is calculated, Δ U = | U-U1|, the central control module compares Δ U with the standard voltage difference Δ Ub,
when the delta U is less than or equal to the delta Ub, the central control module judges that the voltage is in a normal range;
and when the delta U is larger than the delta Ub, the central control module judges that the voltage exceeds a normal range.
6. The automatic dispatching system of the prefabricated electric power cabin as claimed in claim 5, wherein the central control module plots a load change curve of the prefabricated electric power cabin in the past year according to historical data of electric power consumption in the coverage range of the prefabricated electric power cabin, when the central control module determines that the voltage is in a normal range, the output voltage of the prefabricated electric power cabin is adjusted in real time according to the slope of the load change curve, when the output voltage of the prefabricated electric power cabin is adjusted in real time, the central control module corresponds the current date to the same date in the past year, the central control module retrieves the load value corresponding to the current date in the load change curve, calculates the slope k of the load value at the corresponding point, and compares | k | with a first preset curve slope k1 and a second preset curve slope k2,
when | k | < k1, the central control module selects e1 to adjust the output voltage of the electric power prefabrication cabin to a corresponding value;
when k1 is less than | k | and less than or equal to k2, the central control module selects the output voltage of the e2 electric power prefabricated cabin to adjust to a corresponding value;
when k2 is less than | k |, the central control module selects e3 to adjust the output voltage of the electric power prefabricated cabin to a corresponding value;
wherein e1 is a first output voltage regulating coefficient, e2 is a second output voltage regulating coefficient, and e3 is a third output voltage regulating coefficient, wherein k1 is greater than 0 and less than k2, and e1 is greater than 0.1 and less than e2 and less than e3 and less than 0.3 are set;
when the central control module selects ei to adjust the output voltage of the electric prefabricated cabin to a corresponding value, setting i =1,2,3, recording the adjusted output voltage as U1',
when k > 0, set U1' = U1 × (1 + ei);
when k < 0, set U1' = U1 × (1-ei).
7. The automatic dispatching system of electric prefabricated cabin, according to claim 5, characterized in that when the central control module determines that the voltage exceeds the normal range, if U > U1, the central control module determines that the actual voltage U is too high, the central control module controls the variable resistor to start to regulate the output voltage of the electric prefabricated cabin, the central control module calculates a resistance regulation parameter F, and sets the resistance regulation parameter F
Wherein, k' is the slope of the curve corresponding to the current time, k1 is the slope of the first preset curve, and k2 is the slope of the second preset curve.
8. The automatic dispatching system of the electric prefabricated cabin, as recited in claim 7, wherein the central control module is provided with a first resistance adjustment comparison parameter F1 and a second resistance adjustment comparison parameter F2, wherein F1 < F2, when the central control module adjusts the starting resistance value of the variable resistor to a corresponding value according to the resistance adjustment parameter F,
when F is less than or equal to F1, the central control module adjusts the starting resistance value of the variable resistor to
；
When F1 < F ≦ F2, the central control module adjusting an enabled resistance value of the variable resistor to R = F × R0 × (1 + α 1);
when F2 is less than F, the central control module starts the power-off protection device to carry out power-off protection, and starts the fault alarm device to give an alarm;
wherein R0 is a preset standard starting resistance value, alpha 1 is a conversion coefficient, and alpha 1 is more than 0 and less than 0.1.
9. The automatic dispatching system of the electric prefabricated cabin, as claimed in claim 5, wherein the central control module is provided with a circuit critical temperature T0, when the central control module determines that the voltage is out of the normal range, if U < U1, the central control module determines that the actual voltage U is too low, the central control module controls the detection module to detect the circuit temperature T, the central control module compares T with T0,
when T is less than T0, the central control module determines that the temperature does not exceed the critical temperature of the circuit and corrects the output voltage of the electric prefabricated cabin according to delta U;
and when T is more than or equal to T0, the central control module judges that the temperature exceeds the critical temperature of the circuit, starts the power-off protection device for power-off protection, and simultaneously starts the fault alarm device for alarming.
10. The automatic dispatching system of the electric prefabricated cabin according to claim 9, wherein the central control module is provided with a first preset voltage difference value Δ U1 and a second preset voltage difference value Δ U2, wherein Δ U1 is smaller than Δ U2, when the central control module determines that the temperature does not exceed the critical temperature of the circuit and corrects the output voltage of the electric prefabricated cabin according to Δ U, the central control module compares Δ U with Δ U1 and Δ U2,
when the delta U is less than or equal to the delta U1, the central control module corrects the output voltage of the electric prefabricated cabin into U2 and sets
；
When delta U1 is larger than delta U and is smaller than or equal to delta U2, the central control module corrects the output voltage of the electric prefabricated cabin into U2 and sets
；
When delta U2 is less than delta U, the central control module corrects the output voltage of the electric prefabricated cabin into U2 and sets
；
Wherein the content of the first and second substances,
1 is a first output voltage too small correction coefficient,
2 is the second output voltage too small correction factor,
3 is the over-small correction coefficient of the third output voltage, 1.1 < (R) >
1＜
2＜
3＜1.3。
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Address after: 272000 South Xinyuan Road North, Electromechanical 1st Road, High-tech Zone, Jining City, Shandong Province Patentee after: Shandong Zhongao Power Equipment Co.,Ltd. Address before: 272000 South Xinyuan Road North, Electromechanical 1st Road, High-tech Zone, Jining City, Shandong Province Patentee before: Shandong ZhongAo Electric Equipment Co.,Ltd. |