Locking method of centralized control right in AVC control strategy

Abstract

The invention relates to a locking method of a centralized control right in an AVC control strategy, and the method comprises the following steps: 1, collecting switch remote control information of a whole station, and setting locking attributes of different priorities in attributes of a remote control information table; step 2, based on the locking attributes of different priority levels set in the step 1, when the full-station centralized control right locking criterion receives a city dispatching remote control instruction, the first-level remote control participation attribute performs full-station centralized control locking determination verification; step 3, receiving the remote control instruction sent by the step 2, and carrying out second-level AVC control attribute locking judgment verification; and step 4, receiving the remote control instruction sent by the step 3, and carrying out locking judgment verification on the third-level unit equipment. According to the invention, the centralized control right locking AVC method with three layers of priorities is introduced, so that the centralized control right locking AVC system of the whole substation is not locked.

Description

Technical Field

[0001] The invention belongs to the technical field of power system overhaul and maintenance, and relates to a locking method of centralized control authority, in particular to a locking method of centralized control authority in an AVC control strategy. Background Art

[0002] The basic goal of power system and power enterprise management and operation is to provide users with safe, high-quality and economical power, and voltage is one of the important indicators of power quality. Automatic voltage control (AVC) technology can effectively improve voltage quality, reduce line reactive flow, and improve power factor, which has a direct impact on the stable operation of power system, reducing line losses, ensuring industrial and agricultural production safety, and improving product quality. With the development and application of power automation technology, the integrated automation technology model and unmanned substation management model are increasingly being put into actual production and operation.

[0003] The "centralized control right" of the entire substation is an important safety strategy for the dispatching and control center to control the "centralized control station" to solve the monitoring and management problems of unmanned substations. For integrated automation stations, equipment control can be divided into local monitoring and remote monitoring. The "centralized control right" of the entire substation is the setting of monitoring authority. When the AVC system issues a control strategy, the "centralized control right" of the entire station will lock the control strategy, that is, when the "centralized control right" of the entire station is in "centralized control", this substation receives the automatic control of the AVC system for reactive power regulation, and the control strategy is issued normally. At this time, the station end receives the remote control and remote adjustment instructions issued by the dispatch and performs normal operation control tasks; when the "centralized control right" of the entire station is in the "station end", the remote control and remote adjustment functions are locked, and this substation exits the automatic control of the AVC system. The substation cannot perform the calibration and execution of the remote control and remote adjustment instructions issued by the dispatch. Instead, the base station operation and maintenance personnel accept the relevant dispatching commands to directly operate the equipment, that is, manual adjustment.

[0004] The method of voltage and reactive power regulation of AVC with the whole station centralized control authority locked is as follows Figure 1 shown.

[0005] In normal operation, in order to ensure safety, the "centralized control" of the entire station is delegated to the "station end". At this time, the AVC system cannot automatically control the equipment and must be adjusted manually, which will lead to the following disadvantages:

[0006] (1) A dedicated person is required to monitor reactive power and voltage conditions, and the human operation efficiency affects the reactive power and voltage regulation performance of the entire network. This model increases the consumption of manpower costs and also increases the operation and maintenance costs.

[0007] (2) At this time, the voltage and reactive power automatic regulation is a single substation regulation method, which cannot optimally exert the reactive power regulation function of the entire power grid of the AVC system, which is not conducive to the stable operation of the power grid.

[0008] Therefore, the present invention proposes a locking method of centralized control rights in the AVC control strategy, which can solve the above problems.

[0009] After searching, no public documents of the prior art identical or similar to the present invention were found. Summary of the invention

[0010] The purpose of the present invention is to overcome the shortcomings of the prior art and propose a method for locking centralized control rights in the AVC control strategy. By introducing a three-level priority centralized control right locking AVC method, the centralized control rights of the entire substation are not locked in the AVC system.

[0011] The present invention solves the practical problem by adopting the following technical solutions:

[0012] A method for locking centralized control rights in an AVC control strategy comprises the following steps:

[0013] Step 1: Collect the remote control information of all switches in the station, and set the locking attributes of different priority levels in the remote control information table attributes;

[0014] Step 2: Based on the locking attributes of different priority levels set in step 1, when the locking criterion of the whole station centralized control right receives the remote control command of the city dispatching, the first-level participating remote control attribute performs the whole station centralized control locking judgment verification;

[0015] Step 3, receiving the remote control command sent in step 2, and performing a second-level AVC control attribute locking determination check;

[0016] Step 4: Receive the remote control command sent in step 3 and perform a third-level unit device locking determination check.

[0017] Moreover, the locking properties of different priority levels of step 1 are:

[0018] The first level is the remote control participation attribute, the second level is the AVC control attribute, and the third level is the unit equipment locking attribute, and the locking priority level is set to level three greater than level two greater than level one.

[0019] Moreover, the specific steps of step 2 include:

[0020] (1) The whole station centralized control right blocking judgment criterion receives the city dispatch remote control command and detects the remote control attribute. When receiving the command with the first-level remote control attribute of "yes", the remote control command with the first-level remote control attribute participates in the "whole station centralized control" blocking judgment verification. When the whole station "centralized control right" is in "centralized control", the switch can receive the remote control command issued by the master station and perform the remote control operation of the switch; when the whole station "centralized control right" is in "local", the switch in the station does not execute the remote control command issued by the master station;

[0021] (2) The instruction with the second-level AVC control attribute of "yes" and the third-level unit device locking attribute of "yes" is sent to step 2 for determination processing.

[0022] Moreover, the specific steps of step 3 include:

[0023] (1) After receiving the remote control command in which the second-level AVC control attribute in step 2 is "yes" and the third-level unit device locking attribute is "yes", the second-level AVC control attribute sets the AVC control attribute corresponding to the capacitor, reactor, and transformer gear adjustment to "yes" and sets the remaining devices to "no";

[0024] (2) The second-level AVC control attribute determines the remote control command, verifies the remote control point number and the opening and closing command are correct, and the on-site equipment returns to correctly execute the remote control command. This ensures that regardless of whether the "centralized control authority" of the entire station is in the "centralized control", the reactive voltage regulation equipment in the station receives the remote control command of the municipal AVC system and automatically switches on and off;

[0025] (3) The instruction with the lock attribute of the third-level unit device being "yes" is sent to step 4 for determination processing.

[0026] Moreover, the specific steps of step 4 include:

[0027] (1) After receiving the remote control command sent in step 3, the third-level unit equipment locking attribute collects the position of the equipment mechanism handle and the position of the remote control outlet pressure plate of the main transformer tap changer. When the unit equipment fails, power outage is processed or planned power outage is carried out for maintenance, the "remote / local" handle of the equipment mechanism is switched to "local", and the third-level unit equipment locking attribute is "yes", otherwise it is "no".

[0028] The remote control outlet pressure plate of the main transformer tap is exited, and the third level is the unit equipment locking attribute is "yes", otherwise it is "no";

[0029] If the above conditions are not met, the control power supply is disconnected, and the third level is "yes" for the unit device blocking attribute, otherwise it is "no";

[0030] (2) In step 4, the command of receiving the third-level unit device lock attribute of "yes" in step 3 is processed in this step, and the remote control point number is checked. When the device unit lock attribute is "yes", the relevant device unit is locked, and the remote control and remote adjustment commands issued by the city are not received, and only local manual operation can be performed;

[0031] (3) When there is maintenance work at the station end, the relevant methods of AVC are locked, that is, the third-level unit equipment locking method is introduced into the AVC safety locking strategy. When the third-level unit equipment locking is in the "yes" state, the relevant equipment units are locked and no remote control or remote adjustment operations are performed;

[0032] Furthermore, the control method of step 4 (3) comprises the following steps:

[0033] (1) During normal operation, the "centralized control" of the entire substation is in the hands of the "centralized control". The control center is responsible for monitoring the operation of the controlled stations under its jurisdiction; it also keeps statistics and manages the remote control and remote adjustment operation tickets and operation items; the AVC system automatically issues control strategies.

[0034] (2) When normal operation occurs, the "centralized control authority" of the entire substation is delegated to the "station end", and the substation operators accept orders from dispatchers at all levels. After the operation is completed, they return orders to the control center. The control center switches the "centralized control authority" back to "centralized control", and the AVC system automatically issues control strategies.

[0035] (3) Under special circumstances, the "centralized control authority" of the entire substation is delegated to the "station end", and the station personnel will handle the fault. After the handling is completed or comes to an end, the base station operator should report the situation to the centralized control station, and the relevant technical personnel will determine whether to exit the AVC automatic control system based on whether it affects the operation of the AVC system.

[0036] Advantages and beneficial effects of the present invention:

[0037] The present invention provides a locking method for centralized control rights in the AVC control strategy, which can be applied to the AVC control of each unattended substation, can effectively improve the automatic control efficiency of the substation, and avoid AVC exit from centralized control due to maintenance of a single reactive equipment unit. The specific advantages are as follows:

[0038] (1) During normal operation, the reactive voltage regulation equipment in the station can also receive the AVC command from the city dispatcher for automatic switching on and off, without the need for additional operation and maintenance personnel to operate, thus saving manpower costs and developing a visual interface to facilitate control and monitoring by operation and maintenance personnel.

[0039] (2) The present invention introduces a three-level priority centralized control blocking AVC method, so that the centralized control of the entire substation does not block the AVC system, that is, the voltage and reactive power automatic control can also be performed when the "centralized control" of the entire station is at the "station end". This maintains the stability of the system voltage, improves the quality of the power grid voltage and the economic operation level of the entire system, and improves the reactive power voltage management level.

[0040] (3) The present invention introduces a three-level priority centralized control right blocking AVC method. Non-reactive regulation equipment adopts the first-level blocking; reactive regulation equipment adopts the second-level blocking when the whole station is in operation, and can still receive remote control instructions issued by the city dispatch; a single reactive regulation equipment adopts the third-level blocking when it is under maintenance, and no longer receives remote control instructions. When the reactive regulation equipment itself is not defective, it can be connected to the AVC system of the entire network to the maximum extent, receive remote control instructions from the city dispatch, and automatically switch on and off, thereby maintaining the stability of the system voltage, improving the quality of the power grid voltage and the economic operation level of the entire system, and improving the reactive voltage management level. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A diagram of a voltage reactive power regulation method for locking AVC of the whole station centralized control authority in the background technology of the present invention;

[0042] Figure 2 This is a diagram of the centralized control authority locking AVC voltage reactive power regulation method of the present invention;

[0043] Figure 3 This is the AVC control and monitoring interface diagram of the substation of the present invention (I);

[0044] Figure 4 This is the substation AVC control monitoring interface diagram (II) of the present invention. DETAILED DESCRIPTION

[0045] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0046] A method for locking centralized control rights in an AVC control strategy comprises the following steps:

[0047] Step 1: Collect the remote control information of all switches in the station, and set the locking attributes of different priority levels in the remote control information table attributes;

[0048] The locking properties of different priority levels in step 1 are:

[0049] The first level is the remote control participation attribute, the second level is the AVC control attribute, and the third level is the unit equipment locking attribute, and the locking priority level is set to level three greater than level two greater than level one.

[0050] Step 2: Based on the locking attributes of different priority levels set in step 1, when the locking criterion of the whole station centralized control right receives the remote control command of the city dispatching, the first-level participating remote control attribute performs the whole station centralized control locking judgment verification;

[0051] The specific steps of step 2 include:

[0052] (1) The whole station centralized control right blocking judgment criterion receives the city dispatch remote control command and detects the remote control attribute. When receiving the command with the first-level remote control attribute of "yes", the remote control command with the first-level remote control attribute participates in the "whole station centralized control" blocking judgment verification. When the whole station "centralized control right" is in "centralized control", the switch can receive the remote control command issued by the master station and perform the remote control operation of the switch; when the whole station "centralized control right" is in "local", the switch in the station does not execute the remote control command issued by the master station;

[0053] (2) The instruction with the second-level AVC control attribute of "yes" and the third-level unit device locking attribute of "yes" is sent to step 2 for determination processing.

[0054] Step 3, receiving the remote control command sent in step 2, and performing a second-level AVC control attribute locking determination check;

[0055] The specific steps of step 3 include:

[0056] (1) After receiving the remote control command in which the second-level AVC control attribute in step 2 is "yes" and the third-level unit device locking attribute is "yes", the second-level AVC control attribute sets the AVC control attribute corresponding to the capacitor, reactor, and transformer gear adjustment to "yes" and sets the remaining devices to "no";

[0057] (2) The second-level AVC control attribute determines the remote control command, verifies the remote control point number and the opening and closing commands are correct, and verifies that the on-site equipment correctly executes the remote control command. This ensures that regardless of whether the "centralized control authority" of the entire station is in "centralized control", the reactive voltage regulation equipment in the station receives the remote control command of the municipal AVC system and automatically switches on and off.

[0058] (3) The instruction with the lock attribute of the third-level unit device being "yes" is sent to step 4 for determination processing.

[0059] Step 4, receiving the remote control command sent in step 3, and performing a third-level unit device locking determination check;

[0060] The specific steps of step 4 include:

[0061] (1) After receiving the remote control command sent in step 3, the third-level unit equipment locking attribute collects the position of the equipment mechanism handle and the position of the remote control outlet pressure plate of the main transformer tap changer. When the unit equipment fails, power outage is processed or planned power outage is carried out for maintenance, the "remote / local" handle of the equipment mechanism is switched to "local", and the third-level unit equipment locking attribute is "yes", otherwise it is "no".

[0062] The remote control outlet pressure plate of the main transformer tap is exited, and the third level is the unit equipment locking attribute is "yes", otherwise it is "no";

[0063] If the above conditions are not met, the control power supply is disconnected, and the third level is "yes" for the unit device blocking attribute, otherwise it is "no";

[0064] (2) In step 4, the instruction of receiving the third-level unit device locking attribute of "yes" in step 3 is processed in this step, and the remote control point number is checked. When the device unit locking is in "yes", the relevant device unit is locked, and the remote control and remote adjustment instructions issued by the city are not received. Only local manual operation can be performed.

[0065] (3) When there is maintenance work at the station end, the relevant methods of AVC are locked, that is, the third-level unit equipment locking method is introduced into the AVC safety locking strategy. When the third-level unit equipment locking is in the "yes" state, the relevant equipment units are locked and no remote control or remote adjustment operations are performed;

[0066] The control method of step (3) of step 4 comprises the following steps:

[0067] The device unit blocks the AVC voltage reactive power regulation method, such as Figure 2 shown.

[0068] (1) During normal operation, the "centralized control" of the entire substation is in the hands of the "centralized control". The control center is responsible for monitoring the operation of the controlled stations under its jurisdiction; it also keeps statistics and manages the remote control and remote adjustment operation tickets and operation items; the AVC system automatically issues control strategies.

[0069] (2) When normal operation occurs, the "centralized control authority" of the entire substation is delegated to the "station end", and the substation operators accept orders from dispatchers at all levels. After the operation is completed, they return orders to the control center. The control center switches the "centralized control authority" back to "centralized control", and the AVC system automatically issues control strategies.

[0070] (3) Under special circumstances (accidents and abnormalities), the "centralized control authority" of the entire substation is delegated to the "station end", and the station personnel will handle the fault. After the handling is completed or comes to an end, the base station operator should report the situation to the centralized control station, and the relevant technical personnel will determine whether to exit the AVC automatic control system based on whether it affects the operation of the AVC system.

[0071] In this embodiment, if Figure 3 and Figure 4 As shown, in order to further facilitate the operation and maintenance personnel to control and monitor, a visual design is performed on the control and monitoring interface:

[0072] (1) When the device is normally involved in scheduling AVC control, it is displayed as “initiated”.

[0073] (2) When the equipment involved in the AVC control needs to exit AVC for maintenance, the unit will be switched to "manual lock" after permission from the dispatcher.

[0074] (3) Reactive power and voltage regulation equipment are transferred for maintenance, the QK handles of capacitors and reactors are switched to "local", and the remote control outlet pressure plate of the main transformer tap changer is withdrawn. If there is no pressure plate and QK handle, the remote control circuit can be disconnected by disconnecting the control power supply, which can trigger the "automatic lock" of the equipment unit lock. When the substation equipment exits the automatic adjustment of the AVC system, manual adjustment is performed.

[0075] The working principle of the present invention is:

[0076] The present invention takes into account factors such as automatic control in actual operation and saving labor costs, discusses the locking problem of the "centralized control authority" of the entire station in the AVC control strategy, and introduces a three-level priority centralized control authority locking AVC method, so that the centralized control authority of the entire substation does not lock the AVC system, that is, the "centralized control authority" of the entire station can also perform automatic voltage and reactive power control when it is at the "station end", which solves the problem of locking the remote control function of the relevant maintenance equipment unit when the station-end voltage regulating equipment unit is under maintenance.

[0077] It should be emphasized that the embodiments of the present invention are illustrative rather than restrictive. Therefore, the present invention includes but is not limited to the embodiments described in the specific implementation modes. Any other implementation modes derived by those skilled in the art based on the technical solutions of the present invention also fall within the scope of protection of the present invention.

Claims

1. A method for locking centralized control rights in an AVC control strategy, characterized in that: The following steps are involved: Step 1: Collect the remote control information of all switches in the station, and set the locking attributes of different priority levels in the remote control information table attributes; Step 2: Based on the locking attributes of different priority levels set in step 1, when the locking criterion of the whole station centralized control right receives the remote control command of the city dispatching, the first-level participating remote control attribute performs the whole station centralized control locking judgment verification; Step 3, receiving the remote control command sent in step 2, and performing a second-level AVC control attribute locking determination check; Step 4: Receive the remote control command sent in step 3 and perform a third-level unit device locking determination check.

2. The method for locking the centralized control right in the AVC control strategy according to claim 1, characterized in that: The locking properties of different priority levels in step 1 are: The first level is the remote control participation attribute, the second level is the AVC control attribute, and the third level is the unit equipment locking attribute, and the locking priority level is set to level three greater than level two greater than level one.

3. The method for locking the centralized control right in the AVC control strategy according to claim 1, characterized in that: The specific steps of step 2 include: (1) The whole station centralized control right blocking judgment criterion receives the city dispatch remote control command and detects the remote control attribute. When receiving the command with the first-level remote control attribute of "yes", the remote control command with the first-level remote control attribute participates in the "whole station centralized control" blocking judgment verification. When the whole station "centralized control right" is in "centralized control", the switch can receive the remote control command issued by the master station and perform the remote control operation of the switch; when the whole station "centralized control right" is in "local", the switch in the station does not execute the remote control command issued by the master station; (2) The instruction with the second-level AVC control attribute of "yes" and the third-level unit device locking attribute of "yes" is sent to step 2 for determination processing.

4. The method for locking the centralized control right in the AVC control strategy according to claim 1, characterized in that: The specific steps of step 3 include: (1) After receiving the remote control command in which the second-level AVC control attribute in step 2 is "yes" and the third-level unit device locking attribute is "yes", the second-level AVC control attribute sets the AVC control attribute corresponding to the capacitor, reactor, and transformer gear adjustment to "yes" and sets the other devices to "no"; (2) The second-level AVC control attribute determines the remote control command, verifies the remote control point number and the opening and closing command are correct, and the on-site equipment returns to correctly execute the remote control command. This ensures that regardless of whether the "centralized control authority" of the entire station is in the "centralized control", the reactive voltage regulation equipment in the station receives the remote control command of the municipal AVC system and automatically switches on and off; (3) The instruction with the locking attribute of the third-level unit device being "yes" is sent to step 4 for determination processing.

5. The method for locking the centralized control right in the AVC control strategy according to claim 1, characterized in that: The specific steps of step 4 include: (1) After receiving the remote control command sent in step 3, the third-level unit equipment locking attribute collects the position of the equipment mechanism handle and the position of the remote control outlet pressure plate of the main transformer tap changer. When the unit equipment fails, power outage is processed, or power outage is planned for maintenance, the "remote / local" handle of the equipment mechanism is switched to "local", and the third-level unit equipment locking attribute is "yes", otherwise it is "no"; The remote control outlet pressure plate of the main transformer tap is exited, and the third level is the unit equipment locking attribute is "yes", otherwise it is "no"; If the above conditions are not met, the control power supply is disconnected, and the third level is "yes" for the unit device blocking attribute, otherwise it is "no"; (2) In step 4, the command of receiving the third-level unit device lock attribute of "yes" in step 3 is processed in this step, and the remote control point number is checked. When the device unit lock is in "yes", the relevant device unit is locked, and the remote control and remote adjustment commands issued by the city are not received, and only local manual operation can be performed; (3) When there is maintenance work at the station end, the relevant methods of AVC are locked, that is, the third-level unit equipment locking method is introduced into the AVC safety locking strategy. When the third-level unit equipment locking is in the "yes" state, the relevant equipment units are locked and no remote control or remote adjustment operations are performed.

6. The method for locking the centralized control right in the AVC control strategy according to claim 5, characterized in that: The control method of step (3) of step 4 comprises the following steps: (1) During normal operation, the "centralized control" of the entire substation is in the hands of the "centralized control". The control center is responsible for monitoring the operation of the controlled stations under its jurisdiction; it also keeps statistics and manages the operation tickets and operation items of remote control and remote adjustment; the AVC system automatically issues control strategies; (2) During normal operation, the "centralized control authority" of the entire substation is delegated to the "station end", and the substation operators accept orders from dispatchers at all levels; after the operation is completed, they return orders to the control center; the control center switches the "centralized control authority" back to the "centralized control", and the AVC system automatically issues control strategies; (3) Under special circumstances, the "centralized control authority" of the entire substation is delegated to the "station end", and the station personnel will handle the fault. After the handling is completed or comes to an end, the base station operator should report the situation to the centralized control station, and the relevant technical personnel will determine whether to exit the AVC automatic control system based on whether it affects the operation of the AVC system.

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