CN-122000909-A - Power-loss station power transfer control method and system based on serial SOP

CN122000909ACN 122000909 ACN122000909 ACN 122000909ACN-122000909-A

Abstract

The invention discloses a power-losing station power transfer control method based on a serial SOP, which comprises the steps of obtaining data information of a target power system, obtaining real-time parameter data of the target power system in real time when station faults and power losses exist in the station, transferring power to the fault station through the serial SOP by a normal station and judging capacity overload states of all phases, setting all phase control modes of the serial SOP and carrying out corresponding output parameter calculation, and completing power transfer control of the power-losing station based on the serial SOP according to calculation results. The invention also discloses a system for realizing the power-losing transformer area power transfer control method based on the serial SOP. The invention not only realizes the control of power transfer of the power-losing transformer area based on serial SOP, but also has higher reliability and better accuracy.

Inventors

LAN ZHENG
Su Yuanchen
WANG XIN
ZHANG DENGPAN
HE DONG
SUN ZHIFENG
LUO YU

Assignees

湖南工业大学

Dates

Publication Date: 20260508
Application Date: 20260212

Claims (8)

1. A power-losing transformer area power transfer control method based on serial SOP comprises the following steps: s1, acquiring data information of a target power system; s2, when the power failure occurs due to the fault of the transformer area, acquiring real-time parameter data of a target power system in real time; s3, transferring power to a fault station area by the normal station area through the serial SOP, and judging the capacity overload state of each phase according to the data information obtained in the step S1 and the step S2; S4, setting each phase control mode of the serial SOP according to the state judgment result obtained in the step S3, and calculating corresponding output parameters; And S5, completing power transfer control of the power-losing station area based on the serial SOP according to the calculation result obtained in the step S4.
2. The method for controlling power transfer of a power-losing transformer area based on serial SOP according to claim 1, wherein the step S1 is characterized by obtaining data information of a target power system, and specifically comprises the following steps: Acquiring data information of a target power system; The data information comprises output terminal voltage of each phase, current of each phase, phase of each phase, rated capacity data of a station area and line load data.
3. The power-loss station power transfer control method based on serial SOP of claim 2, wherein when there is a station failure and power loss in step S2, real-time parameter data of a target power system is obtained in real time, and specifically comprises the following steps: when the power failure occurs due to the fault of the transformer area, real-time parameter data of a target power system are obtained in real time; the real-time parameter information comprises platform real-time load information, platform real-time voltage information, platform real-time current information and platform real-time phase information.
4. The power-loss area power transfer control method based on serial SOP according to claim 3, wherein the normal area in step S3 transfers power to the fault area through serial SOP, and determines the capacity overload state of each phase according to the data information obtained in step S1 and step S2, and specifically includes the following steps: The residual capacity of the normal area is calculated by adopting the following formula : In the middle of Maximum output active power of the normal station area; The active power is carried by the fault area; the active power is carried by the normal station area; The value of x is a, b or c and represents three phases a, b and c; Based on the obtained residual capacity Judging overload states of all compatible amounts of the normal station areas by adopting the following rules: Based on the obtained residual capacity Judging overload states of all compatible amounts of the normal station areas by adopting the following rules: If it is Judging that the x-phase port phase power of the normal station area exceeds the capacity safety boundary of the normal station area ; If it is Judging that the x-phase port phase power of the normal station area does not exceed the capacity safety boundary of the normal station area 。
5. The method for power-loss-in-place power switching control based on tandem type SOP according to claim 4, wherein the step S4 is characterized in that each phase control mode of the tandem type SOP is set according to the status determination result obtained in the step S3, and specifically comprises the following steps: If the x-phase port phase power of the normal station area exceeds the capacity safety boundary of the normal station area, setting the x-phase of the normal station area as an active current limiting mode; If the phase power of the x-phase port of the normal station area does not exceed the capacity safety boundary of the normal station area, setting the x-phase of the normal station area as a reactive compensation mode.
6. The power-loss transformer area power transfer control method based on serial SOP of claim 5, wherein when the x-phase of the normal transformer area is in an active current limiting mode, the corresponding output parameters are calculated by the following steps: the output parameters comprise the amplitude and the phase of the output voltage of the x phase of the serial SOP; An integral controller is added in an active current-limiting control loop of the serial SOP to ensure that the phase difference between the phase output by each phase of the serial SOP and the feeder current is the same when the serial SOP is stable The output voltage phase of the serial SOP at this time is expressed as In the middle of An output voltage phase that is the x-phase of the serial SOP; feeder current phase, which is the x-phase of the series SOP; The active power of the x-phase feeder line for transferring the normal station area is calculated by adopting the following formula And reactive power : In the middle of The effective value of the x-phase voltage of the normal station area; X-phase feeder current for normal and fault regions Is a magnitude of (a); the phase of the x-phase voltage of the normal station area; Maximum active power that a normal bay can use to forward to a failed bay Represented as ; Therefore, in order to ensure the operation safety of the station area, the actual power transfer of the normal station area Satisfy the following requirements ; Calculating to obtain the X-phase feeder current of the normal station area and the fault station area Amplitude of (a) of (b) Is that ; X-phase output voltage of serial SOP Voltage of normal station area The relationship with line impedance is expressed as: In the middle of The impedance of the x-phase feeder line between the normal station area and the serial SOP after the serial SOP is connected into the interconnection station area; the resistance of the X-phase feeder line between the normal station area and the serial SOP after the serial SOP is connected into the interconnection station area; the inductance of the x-phase feeder line between the normal station area and the serial SOP after the serial SOP is connected into the interconnection station area; The X-phase feeder line impedance between the fault platform area and the serial SOP after the serial SOP is connected into the interconnection platform area; the resistance of the X-phase feeder line between the fault platform area and the serial SOP after the serial SOP is connected into the interconnection platform area; the inductance of the x-phase feeder line between the fault platform area and the serial SOP after the serial SOP is connected into the interconnection platform area; The equivalent impedance of the load carried by the fault area; Obtaining The expression of (2) is And then obtain Amplitude of (a) of (b) And phase of The method comprises the following steps: In the middle of The x-phase output voltage amplitude of the serial SOP; An x-phase output voltage phase which is a serial SOP; Is three-phase total impedance; Is the grid angular frequency; the equivalent resistance of the load carried by the fault area; The equivalent inductance of the load carried by the fault area; The phase of the three-phase total impedance; According to Is calculated by the formula (I), and the following results: And The orthogonal relationship is satisfied, thus yielding: Thereby obtaining the relation between the amplitude and the phase of the output voltage of the serial SOP, which is expressed as: finally, the calculation formula of the amplitude and the phase of the output voltage is obtained, which is expressed as: In the middle of Is the phase difference between the serial SOP output voltage and the normal station voltage; X-phase output voltage of serial SOP Represented as 。
7. The power conversion control method for a power-losing transformer area based on serial SOP according to claim 6, wherein when the x-phase of the normal transformer area is in a reactive compensation mode, the corresponding output parameters are calculated by the following steps: the output parameters comprise the amplitude and the phase of the output voltage of the x phase of the serial SOP; Calculating to obtain x-phase absorption power value of serial SOP Is that ; In reactive compensation mode, the phase load power of the fault area is supplied by the normal area, so that according to the load and required power value of the fault area, the phase load power is calculated Amplitude of (a) of (b) And phase of : In the middle of The power factor of the load of the fault area; To ensure that the serial SOP is reactive compensation, ensure Advancing ; Finally, the x-phase output voltage of the serial SOP is obtained Represented as 。
8. A system for realizing the power transfer control method of the power failure platform region based on the serial SOP is characterized by comprising a parameter acquisition module, a real-time acquisition module, a state judgment module, a parameter calculation module and a transfer control module, wherein the parameter acquisition module, the real-time acquisition module, the state judgment module, the parameter calculation module and the transfer control module are sequentially connected in series, the parameter acquisition module is used for acquiring data information of a target power system and uploading the data information to the real-time acquisition module, the real-time acquisition module is used for acquiring real-time parameter data of the target power system in real time when a platform region fails and loses power, the data information is uploaded to the state judgment module, the state judgment module is used for transferring power to a failure platform region through the serial SOP according to the received data information, judging a capacity overload state of each phase and uploading the data information to the parameter calculation module, the parameter calculation module is used for judging the result according to the received data information, setting each phase control mode of the serial SOP and carrying out corresponding output parameter calculation according to the obtained state judgment result, and uploading the data information to the transfer control module is used for completing the power transfer control of the power failure platform region based on the received data information, and the power failure control result is completed.

Description

Power-loss station power transfer control method and system based on serial SOP Technical Field The invention belongs to the field of power system automation, and particularly relates to a power-off station power transfer control method and system based on a serial flexible interconnection switch (Soft Open Point, SOP). Background Along with the development of economic technology and the improvement of living standard of people, electric energy becomes an indispensable secondary energy source in the production and living of people, and brings endless convenience to the production and living of people. Therefore, ensuring stable and reliable supply of electric energy becomes one of the most important tasks of the electric power system. The prior series SOP technology is mainly applied to the aspects of power optimization scheduling, three-phase load balance adjustment, active and reactive coordination, network loss reduction and the like under the normal operation working conditions among power distribution network areas, and the structure of the prior series SOP technology is shown in figure 1. At present, a control strategy under a power system normal state aims at power flow optimization under a normal state working condition, and the important point is to improve the running efficiency and the electric energy quality of a power distribution network. However, under the condition of power failure, the normal station needs to transfer power to the power failure station through the serial SOP to restore power supply, and under the condition of larger load power of the power failure station, if no effective transfer control and protection means is available, the overload of the normal station is very easy to cause even further faults. However, the current scheme related to serial SOP fault transfer lacks the capability of adaptively adjusting the transfer strategy according to the actual load state, and cannot simultaneously consider the maximization of the power supply recovery and the safe operation boundary of the normal station area. Therefore, the reliability of the existing scheme is poor, and sufficient guarantee cannot be provided for the safe operation of the power system. Disclosure of Invention The invention aims to provide a power transfer control method for a power-losing station area based on serial SOP, which is high in reliability and good in safety. The second objective of the present invention is to provide a system for implementing the power transfer control method for the power-losing station based on serial SOP. The invention provides a power transfer control method for a power-losing station area based on serial SOP, which comprises the following steps: s1, acquiring data information of a target power system; s2, when the power failure occurs due to the fault of the transformer area, acquiring real-time parameter data of a target power system in real time; s3, transferring power to a fault station area by the normal station area through the serial SOP, and judging the capacity overload state of each phase according to the data information obtained in the step S1 and the step S2; S4, setting each phase control mode of the serial SOP according to the state judgment result obtained in the step S3, and calculating corresponding output parameters; And S5, completing power transfer control of the power-losing station area based on the serial SOP according to the calculation result obtained in the step S4. The step S1 of acquiring the data information of the target power system specifically includes the following steps: Acquiring data information of a target power system; The data information comprises output terminal voltage of each phase, current of each phase, phase of each phase, rated capacity data of a station area and line load data. When the power loss occurs due to the fault of the station area in the step S2, the real-time parameter data of the target power system is obtained in real time, and the method specifically comprises the following steps: when the power failure occurs due to the fault of the transformer area, real-time parameter data of a target power system are obtained in real time; the real-time parameter information comprises platform real-time load information, platform real-time voltage information, platform real-time current information and platform real-time phase information. The normal station area in step S3 transfers power to the fault station area through the tandem SOP, and determines the capacity overload state of each phase according to the data information obtained in step S1 and step S2, and specifically includes the following steps: The residual capacity of the normal area is calculated by adopting the following formula : In the middle ofMaximum output active power of the normal station area; The active power is carried by the fault area; the active power is carried by the normal station area; The value of x is a, b or c and represents three phases a, b a