CN105429148B - A kind of Regulation Control method, apparatus and system - Google Patents

Abstract

The present application provides a voltage regulation control method, device and system. The voltage regulation control method includes: the main control unit obtains the first terminal voltage of the power line collected by the reactive power compensation device; the main control unit judges the first terminal voltage When it is not within the normal voltage range, control the reactive power compensation device to adjust the first terminal voltage to obtain the second terminal voltage; the main control unit judges whether the second terminal voltage is within the normal voltage range; if so, stop voltage regulation; if If not, the master control unit sends an upshift command to the slave control unit when the second terminal voltage is lower than the voltage lower limit; the master control unit sends a downshift command to the slave control unit when the second terminal voltage is greater than the voltage upper limit. In this application, the mutual coordination of the reactive power compensation device and the on-load voltage regulating transformer is realized, avoiding repeated regulation of the power circuit voltage, and improving the stability of the power system.

Description

A pressure regulation control method, device and system

technical field

The present application relates to the field of electric power, in particular to a voltage regulation control method, device and system.

Background technique

Voltage is an important quality index in power system. During the normal operation of the power system, due to the fluctuation of the power supply voltage and the change of the load size, the power supply voltage of the system often changes, and the voltage change will cause abnormal operation of the electrical equipment, which directly affects production and daily life.

Among them, the on-load voltage regulating transformer located at the head end of the power line and the reactive power compensation device located at the end of the power line both have the function of voltage regulation, and adjust the voltage when the power supply voltage changes. However, the voltage regulation function of the on-load tap changer and the voltage regulation function of the reactive power compensation device are implemented independently, and the two cannot be coordinated with each other. As a result, when the power supply voltage fluctuates, both of them will perform voltage regulation at the same time, which may cause regulation The final voltage is still greater than the upper limit or lower than the lower limit of the voltage, and the on-load tap changer and reactive power compensation device continue to regulate voltage, causing the on-load tap changer and reactive power compensation device to repeatedly adjust the supply voltage, which is not conducive to the power system. Stablize.

Contents of the invention

In order to solve the above technical problems, the embodiment of the present application provides a voltage regulation control method, device and system, so as to avoid repeated adjustment of the power line voltage and improve the stability of the power system. The technical solution is as follows:

A pressure regulation control method, comprising:

The main control unit obtains the first terminal voltage of the power line collected by the reactive power compensation device;

When the main control unit determines that the first terminal voltage is not within a normal voltage range, control the reactive power compensation device to adjust the first terminal voltage to obtain a second terminal voltage;

The main control unit judges whether the second terminal voltage is within a normal voltage range;

If so, stop pressure regulation;

If not, the master control unit sends an upshift instruction to the slave control unit when the second terminal voltage is lower than the voltage lower limit, so that the slave control unit controls the on-load tap changer to adjust the voltage according to the upshift instruction. the head-end voltage of the power line;

When the second terminal voltage is greater than the upper voltage limit, the master control unit sends a downshift instruction to the slave control unit, so that the slave control unit controls the on-load tap changer to adjust the The head-end voltage of the power line.

Preferably, the process of the master control unit sending an upshift command to the slave control unit includes:

The master control unit establishes a wireless transmission channel between the master control unit and the slave control unit;

The master control unit sends an upshift command to the slave control unit through the wireless transmission channel.

Preferably, the process of sending the downshift command from the master control unit to the slave control unit includes:

The master control unit establishes a wireless transmission channel between the master control unit and the slave control unit;

The master control unit sends a downshift command to the slave control unit through the wireless transmission channel.

Preferably, the normal voltage range is 220V*0.98～220V*1.06;

Wherein, the 220V*0.98 is the lower voltage limit, and the 220V*1.06 is the upper voltage limit.

A voltage regulation control device, comprising: an acquisition unit, a first control unit, a judging unit, a second control unit, a first sending unit, and a second sending unit, wherein:

An acquisition unit, configured to acquire the first terminal voltage of the power line collected by the reactive power compensation device;

A first control unit, configured to control the reactive power compensation device to adjust the first terminal voltage to obtain a second terminal voltage when it is determined that the first terminal voltage is not within a normal voltage range;

a judging unit, configured to judge whether the voltage at the second terminal is within a normal voltage range, and if so, trigger the second control unit to stop voltage regulation; otherwise, trigger the first sending unit when the voltage at the second terminal is lower than the lower voltage limit, sending an upshift instruction to the slave control unit, so that the slave control unit controls the on-load tap changer to adjust the head-end voltage of the power line according to the upshift instruction; or, trigger the second sending unit to When the terminal voltage is greater than the upper voltage limit, a downshift instruction is sent to the slave control unit, so that the slave control unit controls the on-load tap changer to adjust the head end voltage of the power line according to the downshift instruction.

Preferably, the first sending unit includes:

A first establishment subunit, configured to establish a wireless transmission channel between the voltage regulation control device and the slave control unit;

The first sending subunit is configured to send an upshift instruction to the slave control unit through the wireless transmission channel.

Preferably, the second sending unit includes:

A second establishment subunit, configured to establish a wireless transmission channel between the voltage regulation control device and the slave control unit;

The second sending subunit is configured to send a downshift instruction to the slave control unit through the wireless transmission channel.

A voltage regulation control system, including a reactive power compensation device, an on-load voltage regulation transformer, a slave control unit, and a voltage regulation control device as described in any one of the above;

The pressure regulating control device is connected to the reactive power compensation device;

The slave control unit is connected to the on-load voltage regulating transformer;

The pressure regulating control device is connected to the slave control unit;

The slave control unit is used to control the on-load voltage regulation transformer to adjust the head-end voltage of the power line according to the upshift instruction sent by the voltage regulation control device or to control the on-load voltage regulation transformer according to the downshift instruction sent by the voltage regulation control device. The voltage transformer adjusts the head-end voltage of the power line;

The reactive power compensation device is used to adjust the terminal voltage of the power line;

The on-load voltage regulating transformer is used for regulating the head-end voltage of the power line.

Compared with the prior art, the beneficial effects of the present application are:

In this application, the master control unit controls the reactive power compensation device, and the slave control unit controls the on-load voltage regulating transformer. Among them, the main control unit firstly controls the reactive power compensation device to adjust the voltage of the power line. The slave control unit controls the on-load tap-changing transformer to adjust the voltage of the power circuit according to the up-shift command or down-shift command, realizing the mutual coordination between the reactive power compensation device and the on-load tap-changing transformer, avoiding the on-load tap-changing transformer and reactive power compensation The device performs voltage regulation at the same time, thereby avoiding repeated regulation of the power line voltage and improving the stability of the power system.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is a kind of flowchart of the voltage regulating control method provided by the present application;

Fig. 2 is a kind of sub-flow chart of the voltage regulating control method provided by the present application;

Fig. 3 is another sub-flow chart of the pressure regulation control method provided by the present application;

Fig. 4 is a schematic diagram of a logical structure of the voltage regulating control device provided by the present application;

Fig. 5 is a schematic diagram of a logic structure of the voltage regulating control system provided by the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some of the embodiments of the application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

Embodiment one

Please refer to Fig. 1, which shows a flow chart of the pressure regulation control method provided by the present application, which may include the following steps:

Step S11: the main control unit acquires the first terminal voltage of the power line collected by the reactive power compensation device.

In this embodiment, the RS485 communication method is adopted between the main control unit and the reactive power compensation device. After the communication channel is established, the main control unit can obtain the terminal voltage of the power circuit collected by the reactive power compensation device.

Step S12: When the main control unit determines that the first terminal voltage is not within a normal voltage range, control the reactive power compensation device to adjust the first terminal voltage to obtain a second terminal voltage.

Step S13: The main control unit judges whether the second terminal voltage is within a normal voltage range.

If yes, execute step S14; if not, execute step S15 or step S16.

Step S14: Stop regulating the pressure.

Step S15: When the second terminal voltage is lower than the lower voltage limit, the master control unit sends an upshift command to the slave control unit, so that the slave control unit controls the on-load tap changer to adjust the The head-end voltage of the power line mentioned above.

Step S16: the master control unit sends a downshift instruction to the slave control unit when the second terminal voltage is greater than the upper voltage limit, so that the slave control unit controls the on-load tap changer according to the downshift instruction Regulating the head-end voltage of the power line.

It should be noted that the reactive power compensation device is located at the end of the power line, and the on-load tap changer is located at the head end of the power line. Terminal voltage, so as to realize the regulation of the voltage of the power line.

In the present application, steps S11 to S16 are executed every preset time to realize uninterrupted monitoring and adjustment of the power line voltage.

In this application, the master control unit controls the reactive power compensation device, and the slave control unit controls the on-load voltage regulating transformer. Among them, the main control unit firstly controls the reactive power compensation device to adjust the voltage of the power line. The slave control unit controls the on-load tap-changing transformer to adjust the voltage of the power circuit according to the up-shift command or down-shift command, realizing the mutual coordination between the reactive power compensation device and the on-load tap-changing transformer, avoiding the on-load tap-changing transformer and reactive power compensation The device performs voltage regulation at the same time, thereby avoiding repeated regulation of the power line voltage and improving the stability of the power system.

In this embodiment, in this embodiment, the communication mode between the master control unit and the slave control unit is wireless transmission, specifically:

The process of sending an upshift command from the master control unit to the slave control unit is shown in Figure 2, which may include the following steps:

Step S21: The master control unit establishes a wireless transmission channel between the master control unit and the slave control unit.

Step S22: the master control unit sends an upshift instruction to the slave control unit through the wireless transmission channel.

The process of sending the downshift command from the master control unit to the slave control unit can be referred to in FIG. 3 , and may include the following steps:

Step S31: The master control unit establishes a wireless transmission channel between the master control unit and the slave control unit.

Step S32: the master control unit sends a downshift command to the slave control unit through the wireless transmission channel.

In this embodiment, the normal voltage range may specifically be: 220V*0.98˜220V*1.06. Wherein, the 220V*0.98 is the lower voltage limit, and the 220V*1.06 is the upper voltage limit.

Embodiment two

Corresponding to the embodiment of the pressure regulation control method shown in Figure 1, the present application provides a pressure regulation control device, please refer to Figure 4, which shows a schematic diagram of the logic structure of the pressure regulation control device provided by the present application , the pressure regulation control device includes: an acquisition unit 41 , a first control unit 42 , a judgment unit 43 , a second control unit 44 , a first sending unit 45 and a second sending unit 46 .

The obtaining unit 41 is configured to obtain the first terminal voltage of the power line collected by the reactive power compensation device.

The first control unit 42 is configured to control the reactive power compensation device to adjust the first terminal voltage to obtain a second terminal voltage when it is determined that the first terminal voltage is not within a normal voltage range.

The judging unit 43 is used to judge whether the second terminal voltage is within the normal voltage range, and if so, stop voltage regulation, otherwise trigger the first sending unit 45 to send a message to the slave control when the second terminal voltage is lower than the lower voltage limit. The unit sends an upshift command, so that the slave control unit controls the on-load tap changer to adjust the head-end voltage of the power line according to the up-shift command; or, triggers the second sending unit 46 to adjust the voltage at the second end When the voltage is greater than the upper limit, a downshift instruction is sent to the slave control unit, so that the slave control unit controls the on-load tap changer to adjust the head-end voltage of the power line according to the downshift instruction.

In this embodiment, the first sending unit 45 may specifically include: a first establishing subunit and a first sending subunit.

A first establishment subunit, configured to establish a wireless transmission channel between the voltage regulation control device and the slave control unit;

The first sending subunit is configured to send an upshift instruction to the slave control unit through the wireless transmission channel.

In this embodiment, the second sending unit 46 may specifically include: a second establishing subunit and a second sending subunit.

A second establishment subunit, configured to establish a wireless transmission channel between the voltage regulation control device and the slave control unit;

The second sending subunit is configured to send a downshift instruction to the slave control unit through the wireless transmission channel.

Embodiment Three

In this embodiment, a voltage regulation control system is shown. Please refer to FIG. 5. The voltage regulation control system includes: a reactive power compensation device 51, an on-load voltage regulation transformer 52, a slave control unit 53 and a voltage regulation control device 54 .

Wherein, for the specific structure and functions of the pressure regulation control device 54, please refer to Embodiment 2, which will not be repeated here.

The voltage regulation control device 54 is connected with the reactive power compensation device 51 .

The slave control unit 53 is connected to the on-load voltage regulating transformer 52 .

The pressure regulating control device 54 is connected with the slave control unit 53 .

The slave control unit 53 is used to control the on-load voltage regulating transformer 52 to adjust the head-end voltage of the power line according to the upshift command sent by the voltage regulation control device 54 or to control the voltage according to the downshift command sent by the voltage regulation control device 54 The on-load tap changer 52 regulates the head-end voltage of the power line.

The reactive power compensation device 51 is used to adjust the terminal voltage of the power line.

The on-load voltage regulating transformer 52 is used to adjust the head-end voltage of the power line.

It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. For the same and similar parts in each embodiment, refer to each other, that is, Can. As for the device-type embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for related parts, please refer to part of the description of the method embodiments.

Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

A voltage regulation control method, device and system provided by this application has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of this application. The description of the above embodiments is only used to help understand this application. The method of application and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of this application, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be understood For the limitation of this application.

Claims (4)

1. A kind of 1. Regulation Control method, it is characterised in that including：

   Main control unit obtains the first end voltage for the power circuit that reactive power compensator is gathered；

   The main control unit controls the idle benefit when judging the first end voltage not in normal voltage range Repay device and adjust the first end voltage, obtain second end voltage；

   Whether the main control unit judges the second end voltage in normal voltage range；

   If so, then stop pressure regulation；

   If it is not, then the main control unit rises when the second end voltage is less than lower voltage limit to being sent from control unit Shelves instruction, so that described adjust the power circuit from control unit according to upshift command control ULTC Head end voltage, the main control unit include to the process that upshift command is sent from control unit：The main control unit is in institute State main control unit and described from establishing wireless transfer channel between control unit；The main control unit passes through the wireless biography Defeated passage sends upshift command to described from control unit；

   The main control unit refers to when the second end voltage is more than upper voltage limit to described from control unit transmission downshift Order, so that the head end for adjusting the power circuit according to downshift command control ULTC from control unit Voltage, the main control unit include to the process that downshift command is sent from control unit：The main control unit is in institute State main control unit and described from establishing wireless transfer channel between control unit；The main control unit passes through the wireless biography Defeated passage sends downshift command to described from control unit.
2. 2. according to the method for claim 1, it is characterised in that the normal voltage range is 220V*0.98~220V* 1.06；

   Wherein, the 220V*0.98 is the lower voltage limit, and the 220V*1.06 is the upper voltage limit.
3. A kind of 3. Regulation Control device, it is characterised in that including：Acquiring unit, the first control unit, judging unit, the second control Unit, the first transmitting element and the second transmitting element processed, wherein：

   Acquiring unit, the first end voltage of the power circuit gathered for obtaining reactive power compensator；

   First control unit, for when judging the first end voltage not in normal voltage range, controlling the nothing Reactive power compensation installations adjust the first end voltage, obtain second end voltage；

   Judging unit, for judging the second end voltage whether in normal voltage range, if so, the then control of triggering second Unit stops pressure regulation, if otherwise triggering the first transmitting element when the second end voltage is less than lower voltage limit, to from control Unit sends upshift command, so that described control described in ULTC regulation from control unit according to the upshift command The head end voltage of power circuit；Or, the second transmitting element of triggering is when the second end voltage is more than upper voltage limit, to described Downshift command is sent from control unit, so that described adjust from control unit according to downshift command control ULTC Save the head end voltage of the power circuit；

   First transmitting element includes：

   First establishes subelement, for the Regulation Control device and it is described between control unit establish be wirelessly transferred it is logical Road；

   First transmission sub-unit, for sending upshift command from control unit to described by the wireless transfer channel；

   Second transmitting element includes：

   Second establishes subelement, for the Regulation Control device and it is described between control unit establish be wirelessly transferred it is logical Road；

   Second transmission sub-unit, for sending downshift command from control unit to described by the wireless transfer channel.
4. 4. a kind of voltage control system, it is characterised in that including reactive power compensator, ULTC, from control unit With Regulation Control device as claimed in claim 3；

   The Regulation Control device is connected with the reactive power compensator；

   It is described to be connected from control unit with the ULTC；

   The Regulation Control device is connected with described from control unit；

   It is described from control unit, the upshift command control ULTC for being sent according to the Regulation Control device is adjusted The downshift command control ULTC for saving the head end voltage of power circuit or being sent according to the Regulation Control device is adjusted Save the head end voltage of power circuit；

   The reactive power compensator, for adjusting the terminal voltage of the power circuit；

   The ULTC, for adjusting the head end voltage of the power circuit.