TWM630202U - Power management device - Google Patents

Abstract

A power management device, comprising: a voltage detection device for detecting the power supply voltage to generate a detection signal; a processor to generate a first adjustment signal according to a setting command and the detection signal; a plurality of first voltage regulators a regulator, which is electrically connected to the plurality of output terminals respectively to correspond to the plurality of single-phase output voltages, and each first voltage regulator is electrically connected to the processor to receive the corresponding voltage setting value, and according to the voltage The set value adjusts the corresponding single-phase output voltage to a preset range value, and the preset range value is a set value positively related to the set command. Therefore, it can solve the causes of the peak off-peak voltage rise and fall, the heavy load voltage drop and the three-phase imbalance at the same time, so as to achieve the effect of reducing power waste.

Description

Power management equipment

The present invention relates to a three-phase voltage regulation technology, in particular to a power management device for three-phase voltage.

The existing three-phase power technology will lead to three-phase unbalance due to the unreasonable distribution of the three-phase load of the power supply feeder voltage at the load end and the continuous change of the power load. Therefore, how to solve this problem is the current research direction.

Therefore, an object of the present invention is to provide a power management device that can overcome the shortcomings of the prior art.

Therefore, the power management device is electrically connected to a transformer device. The transformer device has an input group for receiving a supply voltage and an output group for providing a transformer voltage. The output group includes a plurality of output terminals, and each output terminal corresponds to A single-phase output voltage, the plurality of single-phase output voltages constitute the transformer voltage, the supply voltage and the transformer voltage include multiple phases, and the transformer voltage is equal to N times the power supply voltage, and N is proportional to the transformer pressure equipment With a turns ratio, the power management device includes a voltage detection device, a processor, and a plurality of first voltage regulators.

The voltage detection device is electrically connected to the input group to detect the power supply voltage and generate a detection signal, the detection signal includes a plurality of first detection voltage values, and the plurality of first detection voltage values are respectively corresponding to the power supply Multiple phases of voltage.

The processor receives a setting command, is electrically connected to the voltage detection device to receive the detection signal, and generates a first adjustment signal according to the setting command and the detection signal, and the first adjustment signal includes a plurality of voltage setting values , the multiple voltage setting values correspond to multiple phases of the transformed voltage respectively.

The plurality of first voltage regulators are electrically connected to the plurality of output terminals respectively to correspond to the plurality of single-phase output voltages, and each of the first voltage regulators is electrically connected to the processor to receive the corresponding voltage setting value , and the corresponding single-phase output voltage is adjusted to a predetermined range value according to the voltage setting value, and the predetermined range value is a setting value that is positively related to the setting command.

The utility model has the following functions: it can simultaneously solve the causes of peak off-peak voltage rise and fall, heavy load voltage drop and three-phase unbalance, so as to achieve the effect of reducing power waste.

21: Transformer equipment

22: User substation

3: Input group

4: Output group

41: output terminal

42: output terminal

43: output terminal

5: Voltage detection device

51: Multiphase Potential Converter

52: Polyphase meters

61: Processor

71: The first voltage regulator

711: Single-phase potential converter

712: On-load tap changer

72: Second voltage regulator

721: Single-phase potential converter

722: On-load tap changer

8: Low-voltage side meter

A~C: High voltage terminal voltage adjustment process

D~F: Low-voltage terminal voltage adjustment process

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: Fig. 1 is a circuit diagram of an embodiment of the novel power management device; Fig. 2 is a measured voltage diagram of the multi-phase electricity meter of the present embodiment; FIG. 4 is a flowchart of the power management method of this embodiment.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are designated by the same reference numerals.

Referring to FIG. 1 , which is an embodiment of a new type of power management device, a transformer device 21 is electrically connected to a user substation 22 . The transformer device 21 has an input group 3 for receiving a power supply voltage (the application range of the power supply voltage is 3.3kV~35kV.) and an output group 4 for providing a transformer voltage. The output group 4 includes a plurality of output terminals 41 ~43 (in this embodiment, three output terminals are used as an example), each output terminal corresponds to a single-phase output voltage, and the plurality of single-phase output voltages (in this embodiment, three single-phase output voltages are used as an example, respectively It is the voltage of the live wire, the voltage of the ground wire, the voltage of the neutral wire) to form the transformer voltage, the power supply voltage and the transformer voltage include multiple phases, and the transformer voltage is equal to N times the power supply voltage, and N is proportional to the transformer voltage. A turns ratio of the voltage device 21, according to whether the turns ratio is greater than 1 or less than 1, the transformed voltage can be a boost voltage or a buck voltage. The power management device includes: a voltage detection device 5 , a processor 61 , a plurality of first voltage regulators 71 , a low-side power meter 8 and a plurality of second voltage regulators 72 . In this embodiment, the transformer equipment 21 includes three groups A high-voltage single-phase transformer (1 to 1) using amorphous alloy as an iron core, each single-phase transformer is connected to an on-load tap changer (OLTC for short) on the secondary side (output end). The capacity of the power management equipment must be 1.25 times to 2.0 times the actual equipment demand on site to withstand the actual use. It should be noted that the high-voltage single-phase transformer is an oil-immersed autotransformer, however, it is not limited to this.

The voltage detection device 5 is electrically connected to the input group 3 for detecting the power supply voltage, and generates a detection signal. The detection signal includes a plurality of first detection voltage values, and the plurality of first detection voltage values are respectively corresponding to To supply multiple phases of the voltage, the voltage detection device includes a multi-phase potential transformer 51 (Potential Transformer, PT for short) and a multi-phase electricity meter 52 .

The multi-phase potential converter 51 is electrically connected to the input group 3 to receive the power supply voltage, and performs potential conversion on the power supply voltage to generate a converted value, and the converted value has a plurality of phases. The multi-phase electric meter 52 is electrically connected to the multi-phase potential converter 51 to receive the converted value, and generate the detection signal according to the converted value. The polyphase electricity meter 52 is a smart electricity meter. The meter presents the voltage as shown in Figure 2.

The processor 61 receives a setting command, and is electrically connected to the voltage detection device 5 to receive the detection signal, and generates a first adjustment signal according to the setting command and the detection signal, and the first adjustment signal includes a plurality of voltages Setting values (in this embodiment, three voltage setting values are taken as an example), the multiple voltage setting values correspond to multiple phases of the transformed voltage respectively.

The plurality of first voltage regulators 71 are electrically connected to the plurality of output terminals 41 to 43 respectively to correspond to the plurality of single-phase output voltages, and each of the first voltage regulators 71 is electrically connected to the processor 61 to receive all the output voltages. The corresponding voltage setting value is adjusted, and the corresponding single-phase output voltage is adjusted to a predetermined range value according to the voltage setting value, and the predetermined range value is a setting value positively related to the setting command. Each first voltage regulator 71 includes a single-phase potential transformer 711 (Potential Transformer, referred to as PT) and an on-load tap changer 712 (On-Load Tap-Changer, hereinafter referred to as OLTC). The converter 711 is used for potential conversion of the corresponding single-phase output voltage, and the on-load tap changer 712 is electrically connected between the single-phase potential converter 711 and the processor 61, and according to the corresponding voltage The setpoint adjusts the output of this single-phase potential converter. It is further explained here, for example, using the turns ratio design of plus or minus 1~1.5% for each section of OLTC (according to the current actual voltage condition design, it can also be 1~2% or 1.5~3%, but not limited to the above.) (Basic 9 segments, but not limited to this, can be increased according to the situation), wherein, the input ratio of 1% is 1: 1.04/1.03/1.02/1.01/1/0.99/0.98/0.97/0.96 (this conversion ratio also includes 1 pressure and pressure). 1.5% input ratio output is 1:1.06/1.045/1.03/1.015/1/0.985/0.97/0.955/0.94 (this conversion ratio includes both boost and buck). According to the three-phase terminal voltages displayed by the high-voltage side smart meter or the on-site low-voltage side smart meter, as shown in the trend diagram (Figure 3), adjust the voltage of each phase by 1~1.5% to be close to the balance (for example, the single-phase voltage from 10892V) Adjust to 11058V), and set each phase OLTC synchronous automatic adjustment voltage (set 11400V±1.5%), so that Stable voltage, reaching the situation of three-phase voltage stable output (for example, stable at 11400V±1.5%).

The user substation 22 is used to step down and convert the transformed voltage to generate a user voltage, and provide the user voltage to the user low-voltage equipment 23 . The low-voltage side electricity meter 8 is electrically connected to the user substation 22 to detect the user voltage and generate a plurality of second detection voltage values, and the plurality of second detection voltage values respectively correspond to a plurality of phases of the user voltage. The low-voltage side electricity meter 8 is an intelligent electricity meter.

The processor 61 is electrically connected to the low-voltage side meter 8 to receive the plurality of second detection voltage values, and generates a second adjustment signal according to the plurality of second detection voltage values and a target setting value, and the second adjustment signal It is used to adjust the voltage values corresponding to the multiple phases of the user voltage.

Each second voltage regulator 72 is electrically connected to the processor 61 to receive the second adjustment signal, and adjust the voltage value corresponding to each phase of the user voltage according to the second adjustment signal. The user voltage includes three single voltages. phase voltage. Each second voltage regulator 72 includes a single-phase potential converter 721 and an on-load tap changer 722. The single-phase potential converter 721 is used for potential conversion of the corresponding single-phase voltage. The on-load tap switch 722 is electrically connected between the single-phase potential converter 721 and the processor 61 for adjusting the output of the single-phase potential converter.

As shown in FIG. 4 , the power management device executes a power management method. The power management method includes the following steps (A) to (F), wherein the steps (A) to (C) are high-voltage terminal power Voltage adjustment process. Steps (D) to (F) are the low-voltage terminal voltage adjustment process. In this embodiment, only one of the high-voltage terminal voltage adjustment process or the low-voltage terminal voltage adjustment process can be performed, or they can be performed in combination.

Step (A) The power management device detects the power supply voltage, and generates a detection signal, the detection signal includes a plurality of first detection voltage values, and the plurality of first detection voltage values correspond to the plurality of the power supply voltages respectively. a phase. Step (B) the power management device receives a setting command and the detection signal, and generates a first adjustment signal according to the setting command and the detection signal, the first adjustment signal includes a plurality of voltage setting values, the plurality of Each voltage setting value corresponds to a plurality of phases of the transformed voltage respectively. Step (C) The power management device receives the first adjustment signal, and adjusts the corresponding single-phase output voltage to a predetermined range value according to the voltage setting value, and the predetermined range value is a value positively related to the setting command. set value.

(D) The power management device detects the user voltage to generate a plurality of second detection voltage values, and the plurality of second detection voltage values respectively correspond to a plurality of phases of the user voltage.

Step (E) The power management device receives the plurality of second detection voltage values, and generates a second adjustment signal according to the plurality of second detection voltage values and a target setting value, and the second adjustment signal is used for adjustment Voltage values corresponding to multiple phases of the user voltage.

Step (F) the power management device receives the second adjustment signal, and according to the The second adjustment signal adjusts the voltage value corresponding to each phase of the user voltage.

To sum up, in the above-mentioned embodiment, the polyphase electricity meter 52 at the high-voltage side is used to know the changing state of the power supply voltage, and the three OLTCs of the output group 4 of the transformer device 21 are automatically adjusted, or the electricity meter 8 at the low-voltage side is used to know the changing state of the user's voltage. , automatically adjust the three OLTCs at the output end of the user substation 22, these two methods can simultaneously solve the reasons for the rise and fall of the peak off-peak voltage, the heavy-load voltage drop and the three-phase imbalance, and achieve the effect of reducing power waste, effectively solving the existing technology. problems encountered.

However, the above are only examples of the present invention, which should not limit the scope of implementation of the present invention. Any simple equivalent changes and modifications made according to the scope of the patent application for this new model and the contents of the patent specification are still within the scope of the present invention. within the scope of this patent.

21: Transformer equipment

22: User substation

3: Input group

4: Output group

41: output terminal

42: output terminal

43: output terminal

5: Voltage detection device

51: Multiphase Potential Converter

52: Polyphase meters

61: Processor

71: The first voltage regulator

711: Single-phase potential converter

712: On-load tap changer

72: Second voltage regulator

721: Single-phase potential converter

722: On-load tap changer

8: Low-voltage side meter

Claims (8)

A power management device is electrically connected to a transformer device, the transformer device has an input group for receiving a supply voltage and an output group for providing a transformer voltage, the output group includes a plurality of output ends, each output end corresponds to A single-phase output voltage, the plurality of single-phase output voltages constitute the transformer voltage, the supply voltage and the transformer voltage include multiple phases, and the transformer voltage is equal to N times the power supply voltage, and N is proportional to the transformer A turns ratio of a voltage device, the power management device includes: a voltage detection device, electrically connected to the input group to detect the power supply voltage, and generate a detection signal, the detection signal includes a plurality of first detection voltage values, the plurality of first detection voltage values correspond to a plurality of phases of the power supply voltage respectively; a processor receives a setting command and is electrically connected to the voltage detection device to receive the detection signal, and according to the setting The command and the detection signal generate a first adjustment signal, the first adjustment signal includes a plurality of voltage setting values, the plurality of voltage setting values are respectively corresponding to a plurality of phases of the transformed voltage; a plurality of first voltage regulators , the plurality of output terminals are respectively electrically connected to correspond to the plurality of single-phase output voltages, and each first voltage regulator is electrically connected to the processor to receive the corresponding voltage setting value, and according to the voltage setting value The corresponding single-phase output voltage is adjusted to a predetermined range value, and the predetermined range value is a set value positively related to the setting command. The power management device of claim 1, wherein the voltage detection device comprises a multi-phase potential converter and a multi-phase electricity meter, The multi-phase potential converter is electrically connected to the input group to receive the power supply voltage, and the power supply voltage is subjected to potential conversion to generate a converted value. The converted value has a plurality of phases. The multi-phase electric meter is electrically connected to the multi-phase potential converter to After receiving the conversion value, please generate the detection signal according to the conversion value. The power management device of claim 2, wherein the polyphase electricity meter is a smart electricity meter. The power management device of claim 1, wherein each first voltage regulator includes a single-phase potential converter and an on-load tap changer, and the single-phase potential converter is used to convert the corresponding single-phase potential converter The phase output voltage undergoes potential conversion, the on-load tap changer is electrically connected between the single-phase potential converter and the processor, and adjusts the output of the single-phase potential converter according to the corresponding voltage setting value. The power management device according to claim 1 is further electrically connected to a user substation, and the user substation is used for step-down conversion of the transformer voltage to generate a user voltage, wherein the power management device further comprises a low-voltage side meter and a multi- a second voltage regulator, the low-voltage side meter is electrically connected to the user substation to detect the user voltage, and generates a plurality of second detection voltage values, the plurality of second detection voltage values respectively correspond to the higher voltage of the user the processor is also electrically connected to the low-voltage side meter to receive the plurality of second detection voltage values, and generates a second adjustment signal according to the plurality of second detection voltage values and a target setting value, the first 2. The adjustment signal is used to adjust the voltage values corresponding to the multiple phases of the user voltage; Each second voltage regulator is electrically connected to the processor to receive the second adjustment signal, and adjust the voltage value corresponding to each phase of the user voltage according to the second adjustment signal. The power management device according to claim 5, wherein the low-voltage side electricity meter is a smart electricity meter. The power management device of claim 5, wherein each second voltage regulator includes a single-phase potential converter and an on-load tap changer, the user voltage includes a plurality of single-phase voltages, the single-phase voltage The potential converter is used for potential conversion of the corresponding single-phase voltage, and the on-load tap changer is electrically connected between the single-phase potential converter and the processor to adjust the output of the single-phase potential converter. The power management device according to claim 1, wherein the application range of the supply voltage is 3.3kV~35kV.

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