CN118487331B - Distributed photovoltaic power supply regulation and control method and related device - Google Patents
Distributed photovoltaic power supply regulation and control method and related device Download PDFInfo
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Abstract
The invention belongs to the technical field of photovoltaic power generation networking optimization, and discloses a distributed photovoltaic power supply regulation and control method and a related device, wherein the method comprises the following steps: judging whether a reactive output adjustment quantity instruction issued by a power distribution automation master station system is received or not; if yes, executing a reactive output adjustment quantity instruction issued by the power distribution automation master station system; otherwise, obtaining the low-voltage side voltage of the distribution transformer and comparing the low-voltage side voltage with a preset voltage deviation allowable range; if the low-voltage side voltage of the distribution transformer exceeds a preset voltage deviation allowable range, executing a preset reactive power output adjustment quantity gradual progressive regulation task; if the low-voltage side voltage of the distribution transformer does not exceed the preset voltage deviation allowable range, executing a preset reactive vibration reduction adjustment timing task; the reactive power output of the distributed photovoltaic power supply is adaptively and flexibly adjusted according to the actual running condition of the power distribution network, so that overvoltage phenomenon occurring when the distributed photovoltaic power supply is connected is effectively avoided, and the voltage of the power distribution network is ensured to be kept in a stable range.
Description
Technical Field
The invention belongs to the technical field of photovoltaic power generation networking optimization, and particularly relates to a distributed photovoltaic power supply regulation and control method and a related device.
Background
The distributed photovoltaic power supply is one of the main forms of the distributed power supply connected to the power distribution network at present, converts light energy into electric energy through a photovoltaic cell panel, and realizes grid-connected power generation through an inverter; after the distributed photovoltaic power supply is connected into the power distribution network, the power flow distribution of the power distribution network can be changed, and then the steady-state voltage distribution of the power distribution network is affected, and the method is specifically shown as follows: reasonable configuration of the distributed photovoltaic power supply can support the voltage of the power distribution network, but when the distributed photovoltaic power supply is connected into operation without constraint, overvoltage phenomenon occurs at certain nodes of the power distribution network.
At present, in order to avoid overvoltage phenomenon of nodes in a power distribution network, a compensation device is arranged to perform reactive or active regulation and control on the power distribution network containing a distributed photovoltaic power supply; however, the existing regulation and control method cannot perform self-adaptive regulation according to the voltage change of the user; and the current active and reactive output of each power supply is acquired by adopting a polling means, and then differential regulation parameters are transmitted by polling, so that a great deal of time is occupied in the polling process, the regulation precision is low, and the flexibility is poor.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a distributed photovoltaic power supply regulation and control method and a related device, which are used for solving the technical problems that the existing regulation and control method cannot carry out self-adaptive regulation according to the voltage change of a user, and has low regulation and control precision and poor flexibility.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a distributed photovoltaic power supply regulation and control method, which comprises the following steps:
Judging whether a reactive output adjustment quantity instruction issued by a power distribution automation master station system is received or not; if yes, executing a reactive output adjustment quantity instruction issued by the power distribution automation master station system; otherwise, obtaining the low-voltage side voltage of the distribution transformer and comparing the low-voltage side voltage with a preset voltage deviation allowable range;
If the low-voltage side voltage of the distribution transformer exceeds a preset voltage deviation allowable range, executing a preset reactive power output adjustment quantity gradual progressive regulation task; the preset reactive output regulation quantity gradual progressive regulation task comprises regulation quantity progressive regulation operations of a plurality of rounds; the adjustment quantity of each round is progressively adjusted and controlled, and the adjustment quantity comprises the following specific steps: generating and issuing progressive regulation capacity proportion of the current round to each distributed photovoltaic power supply in the platform region according to reactive output regulation corresponding to the progressive regulation operation of the regulation of the current round; the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the next round is calculated from the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the current round;
If the low-voltage side voltage of the distribution transformer does not exceed the preset voltage deviation allowable range, executing a preset reactive vibration reduction adjustment timing task; the preset reactive vibration damping adjustment timing task comprises vibration damping adjustment operation of a plurality of rounds; the vibration reduction regulation and control operation of each round is specifically as follows: and transmitting the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the current round to each distributed photovoltaic power supply in the platform region.
Further, the process of executing the reactive power output adjustment quantity instruction issued by the power distribution automation master station system comprises the following specific steps:
And responding to reactive output regulation quantity instructions issued by the distribution automation master station system, and generating and issuing a capacity regulation and control ratio of the system to each distributed photovoltaic power supply in the platform area.
Further, the process of executing the preset reactive output adjustment quantity gradual progressive regulation task comprises the following specific steps:
Generating and issuing progressive regulation capacity proportion of the current round to each distributed photovoltaic power supply in the platform area according to reactive output regulation quantity corresponding to progressive regulation operation of the regulation quantity of the current round and the capacity equal proportion of each distributed photovoltaic power supply in the platform area;
After the execution of the current round of adjustment quantity progressive regulation operation is finished, judging whether the low-voltage side voltage of the distribution transformer is within a preset voltage deviation allowable range or not;
If yes, finishing executing the preset reactive output adjustment quantity gradual progressive regulation task;
Otherwise, calculating reactive output adjustment quantity corresponding to the adjustment quantity progressive regulation operation of the next round by using reactive output adjustment quantity corresponding to the adjustment quantity progressive regulation operation of the current round; and executing the next round of adjustment quantity progressive regulation and control operation according to the reactive output adjustment quantity corresponding to the next round of adjustment quantity progressive regulation and control operation, until the low-voltage side voltage of the distribution transformer is within a preset voltage deviation allowable range.
Further, the process of executing the preset reactive vibration reduction adjustment timing task comprises the following specific steps:
comparing the current time with the timing time, and judging whether the timing time is reached;
When the timing time arrives, vibration damping regulation operations are performed for a plurality of rounds.
Further, the process of executing vibration damping regulation operation for a plurality of rounds comprises the following specific steps:
transmitting vibration reduction regulation capacity proportion corresponding to vibration reduction regulation operation of the current round to each distributed photovoltaic power supply in the platform region;
After the vibration reduction regulation operation of the current round is finished, judging whether the voltage of the low-voltage side of the distribution transformer is within a preset voltage deviation allowable range or not;
if yes, the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the next round is transmitted to each distributed photovoltaic power supply in the platform area;
Otherwise, the opposite numbers of the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the maximum round are sent to each distributed photovoltaic power supply in the platform area.
Further, the timing time is 0.5-1.0h, and the maximum rotation of vibration reduction regulation and control operation is 10-20 times.
Further, the maximum rotation of the progressive regulation and control operation of the regulating quantity is 5-10 times.
The invention also provides a distributed photovoltaic power regulation and control system, which comprises:
The system regulation and control module is used for judging whether a reactive output regulation quantity instruction issued by the power distribution automation master station system is received or not; if yes, executing a reactive output adjustment quantity instruction issued by the power distribution automation master station system; otherwise, jumping to a voltage comparison module;
The voltage comparison module is used for acquiring the voltage of the low-voltage side of the distribution transformer and comparing the voltage with a preset voltage deviation allowable range;
The progressive regulation and control module is used for executing a preset reactive power output regulation and control task in a progressive mode if the low-voltage side voltage of the distribution transformer exceeds a preset voltage deviation allowable range; the preset reactive output regulation quantity gradual progressive regulation task comprises regulation quantity progressive regulation operations of a plurality of rounds; the adjustment quantity of each round is progressively adjusted and controlled, and the adjustment quantity comprises the following specific steps: generating and issuing progressive regulation capacity proportion of the current round to each distributed photovoltaic power supply in the platform region according to reactive output regulation corresponding to the progressive regulation operation of the regulation of the current round; the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the next round is calculated from the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the current round;
The vibration reduction regulation module is used for executing a preset reactive vibration reduction regulation timing task if the voltage of the low-voltage side of the distribution transformer does not exceed a preset voltage deviation allowable range; the preset reactive vibration damping adjustment timing task comprises vibration damping adjustment operation of a plurality of rounds; the vibration reduction regulation and control operation of each round is specifically as follows: and transmitting the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the current round to each distributed photovoltaic power supply in the platform region.
The invention also provides a distributed photovoltaic power regulation and control device, which comprises:
a memory for storing a computer program;
And the processor is used for realizing the steps of the distributed photovoltaic power supply regulation and control method when executing the computer program.
The invention also provides a computer readable storage medium storing a computer program which when executed by a processor implements the steps of the distributed photovoltaic power regulation method.
Compared with the prior art, the invention has the beneficial effects that:
According to the distributed photovoltaic power regulation and control method provided by the invention, the reactive power output regulation quantity instruction issued by the distribution automation master station system is received to implement regulation and control, or the preset reactive power output regulation quantity is implemented to gradually and progressively regulate and control tasks or the preset reactive vibration reduction regulation timing tasks according to the comparison result of the low-voltage side voltage of the distribution transformer and the preset voltage deviation allowable range, so that the reactive power output of the distributed photovoltaic power supply is adaptively and flexibly regulated according to the actual running condition of the distribution network, the overvoltage phenomenon occurring when the distributed photovoltaic power supply is connected is effectively avoided, the voltage of the distribution network is ensured to be kept in a stable range, the power quality of a user is further ensured, and the regulation and control precision and reliability are high; meanwhile, polling of each distributed photovoltaic power supply in the platform area is not needed, and the real-time property of regulation and control is improved; when the low-voltage side voltage of the distribution transformer exceeds a preset voltage deviation allowable range, reactive power output adjustment quantity is gradually adjusted in a gradual progressive mode, reactive power output of the distributed photovoltaic power supply is gradually adjusted through repeated adjustment quantity gradual adjustment operation, large fluctuation of voltage is avoided, and voltage stability of a power grid is improved; when the low-voltage side voltage of the distribution transformer does not exceed the preset voltage deviation allowable range, a preset reactive vibration reduction adjustment timing task is executed, unnecessary reactive output adjustment is reduced through vibration reduction adjustment operation, and the running economy of the power grid is effectively improved.
The distributed photovoltaic power supply regulation and control system, the distributed photovoltaic power supply regulation and control equipment and the computer readable storage medium provided by the invention have all the advantages of the distributed photovoltaic power supply regulation and control method.
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In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for regulating and controlling a distributed photovoltaic power supply according to embodiment 1;
fig. 2 is an equivalent circuit diagram of a power distribution network of an example area in embodiment 1;
FIG. 3 is a graph of voltage fluctuation of each node in the process of adjusting and controlling an exemplary platform region simulation scene in embodiment 1;
fig. 4 is a block diagram of a distributed photovoltaic power regulation system provided in embodiment 2;
fig. 5 is a block diagram of the distributed photovoltaic power regulation apparatus provided in embodiment 3.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the application more clear, the technical schemes in the embodiments of the application are clearly and completely described below with reference to the accompanying drawings in the embodiments of the application; it will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1
As shown in fig. 1, embodiment 1 provides a distributed photovoltaic power regulation method, which includes the following steps:
And step 1, monitoring an information channel between the distribution automation master station system and the intelligent fusion terminal of the transformer area, and judging whether the intelligent fusion terminal of the transformer area receives a reactive output regulation quantity instruction issued by the distribution automation master station system. If yes, jumping to the step 2; otherwise, jumping to step 3.
And step 2, executing a reactive power output adjusting quantity instruction issued by the power distribution automation master station system. Specifically, the process of executing the reactive power output adjustment quantity instruction issued by the power distribution automation master station system comprises the following steps:
And 21, responding to a reactive output regulation quantity instruction issued by the power distribution automation master station system, and generating a system regulation capacity proportion.
It is assumed that the reactive output adjustment amount in the reactive output adjustment amount instruction issued by the distribution automation master station system to a certain station is; Is arranged in the platform area to compriseThe distributed photovoltaic power supplies are arranged, and each distributed photovoltaic power supply can be regulated and controlled; the capacity of each distributed photovoltaic power supply in the platform area is as follows in sequence:、、…、、…、， Is the first in the area Capacity of the bench distributed photovoltaic power supply.
The system regulates the capacity ratio, specifically:
Wherein, The capacity ratio is regulated and controlled for the system,The sign of (2) depends onIs a sign of (2); reactive output adjustment quantity issued by a power distribution automation master station system; Is the first in the area The capacity of the bench distributed photovoltaic power supply; the total number of the distributed photovoltaic power supplies in the transformer area.
Step 22, issuing the system regulation capacity proportion generated in the step 21 to each distributed photovoltaic power supply in the station area in a broadcast command mode; the system regulation capacity proportion is used for triggering each distributed photovoltaic power supply in the platform region to calculate and obtain reactive power output required by system regulation, and regulation action is executed according to the reactive power output required by system regulation; the reactive power output process required by system regulation and control is calculated by each distributed photovoltaic power supply in the platform region, and specifically comprises the following steps:
Wherein, Is the first in the areaReactive power output required by system regulation and control obtained by calculation of the distributed photovoltaic power supply is achieved.
Step 3, collecting the voltage of the low-voltage side of the distribution transformer, and obtaining the voltage of the low-voltage side of the distribution transformer; and comparing the low-voltage side voltage of the distribution transformer with a preset voltage deviation allowable range. If the low-voltage side voltage of the distribution transformer exceeds a preset voltage deviation allowable range, jumping to the step 4; if the low-voltage side voltage of the distribution transformer does not exceed the preset voltage deviation allowable range, the step 5 is skipped.
And 4, executing a preset reactive output adjustment quantity gradual progressive regulation task. The preset reactive output regulation quantity gradual progressive regulation task comprises regulation quantity progressive regulation operations of a plurality of rounds; the adjustment quantity of each round is progressively adjusted and controlled, and the adjustment quantity comprises the following specific steps: generating and issuing progressive regulation capacity proportion of the current round to each distributed photovoltaic power supply in the platform region according to reactive output regulation corresponding to the progressive regulation operation of the regulation of the current round; the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the next round is calculated by the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the current round.
Specifically, the process of executing the preset reactive output adjustment quantity gradual progressive regulation task comprises the following steps:
Step 41, generating the progressive regulation capacity proportion of the current turn according to the reactive output regulation quantity corresponding to the progressive regulation operation of the regulation quantity of the current turn and the capacity equal proportion of each distributed photovoltaic power supply in the transformer area; the process of generating the progressive regulation capacity proportion of the current turn is specifically as follows:
Wherein, Is the firstProgressively regulating and controlling the capacity proportion in turn; Is the first And the reactive output adjustment quantity corresponding to the gradual adjustment and control operation of the adjustment quantity of the turn.
Step 42, issuing the progressive regulation capacity proportion of the current turn generated in step 41 to each distributed photovoltaic power supply in the station area in the form of a broadcast command; the power generation system comprises a power generation system, a power generation system and a power generation system, wherein the progressive regulation capacity proportion of the current turn is used for triggering each distributed photovoltaic power supply in a transformer area to calculate reactive power output required by the progressive regulation of the current turn, and executing regulation action according to the reactive power output required by the progressive regulation of the current turn; the reactive power output process required by current round progressive regulation is calculated by each distributed photovoltaic power supply in the platform region, and specifically comprises the following steps:
Wherein, Is the first in the areaCalculated first step of table distributed photovoltaic power supplyReactive power output required by the gradual regulation and control of the rounds.
Step 43, judging whether the low-voltage side voltage of the distribution transformer is within a preset voltage deviation allowable range after the execution of the adjustment quantity progressive regulation operation of the current round is finished; if yes, go to step 44; otherwise, go to step 45.
And 44, finishing executing the preset reactive output adjustment quantity gradual progressive regulation task.
Step 45, calculating reactive output adjustment quantity corresponding to the adjustment quantity progressive regulation operation of the next round by using reactive output adjustment quantity corresponding to the adjustment quantity progressive regulation operation of the current round; and executing the next round of adjustment quantity progressive regulation and control operation according to the reactive output adjustment quantity corresponding to the next round of adjustment quantity progressive regulation and control operation calculated until the low-voltage side voltage of the distribution transformer is within a preset voltage deviation allowable range; the process of calculating the reactive output adjustment quantity corresponding to the adjustment quantity progressive regulation operation of the next round by utilizing the reactive output adjustment quantity corresponding to the adjustment quantity progressive regulation operation of the current round specifically comprises the following steps:
Or (b)
Wherein, Is the firstReactive output adjustment quantity corresponding to the round of autonomous regulation operation; Is the first Reactive output adjustment quantity corresponding to the round of autonomous adjustment operation.
More specifically, the algorithm implementation process of the preset reactive output adjustment quantity gradual progressive regulation task comprises the following steps:
step 401, initializing parameters.
Setting an initial adjustment value of reactive output adjustment quantityAnd the reactive output regulating quantity is used as reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the first round; setting the current round of the progressive regulation and control operation of the regulating quantity asAnd the first round of adjustment quantity progressive adjustment operation is that; Setting the maximum rotation of the progressive regulation and control operation of the regulating quantity as; Defining a first voltage observation index asThe second voltage observation index is。
If the low-voltage side voltage of the distribution transformer is higher than the preset voltage deviation allowable range, setting an initial adjustment value of the reactive output adjustment amountIf the reactive power output is positive, inductive reactive power output adjustment quantity is sent out; if the low-voltage side voltage of the distribution transformer is lower than the preset voltage deviation allowable range, setting an initial adjustment value of the reactive power output adjustment quantityNegative, namely, the capacitive reactive output adjustment quantity is sent out; wherein, the reactive output adjustment quantity is initially adjustedAbsolute value of (2)Selecting 5% -15% of the sum of the capacities of the distributed photovoltaic power supplies in the platform area; maximum rotation of progressive regulating and controlling operation of regulating quantityThe value of (2) is related to the expected time for executing one preset reactive output adjustment quantity gradual progressive regulation task, and takes; If the low-side voltage of the distribution transformer is higher than the preset voltage deviation allowable range, then; If the low-voltage side voltage of the distribution transformer is lower than the preset voltage deviation allowable range, then。
Step 402, according to the firstReactive output adjustment quantity corresponding to gradual adjustment quantity adjustment operation of turns is generated according to the equal proportion of the capacities of all the distributed photovoltaic power supplies in the transformer areaProgressively regulating capacity ratio of rounds; And in the form of broadcast command, will beProgressively regulating capacity ratio of roundsAnd sending the power to each distributed photovoltaic power supply in the platform area.
Step 403, waiting for a preset time; Wherein the preset timeDepending on the time that each distributed photovoltaic power supply in the platform region completes one regulation action.
Step 404, execute; Observing the low-voltage side voltage of the distribution transformer; if the observed low-voltage side voltage of the distribution transformer is higher than the preset voltage deviation allowable range, then; If the observed low-voltage side voltage of the distribution transformer is lower than the preset voltage deviation allowable range, then; If the observed low-voltage side voltage of the distribution transformer is within the preset voltage deviation allowable range, then。
Step 405, if it meetsAnd (2) andFinishing executing the preset reactive power output adjustment amount gradual progressive regulation task, recording the result of executing the preset reactive power output adjustment amount gradual progressive regulation task as success, and recording the current voltage of the low-voltage side of the distribution transformer; if it meetsAnd (2) andAnd finishing executing the preset reactive power output adjustment quantity gradual progressive regulation task, recording the failure of the result of executing the preset reactive power output adjustment quantity gradual progressive regulation task, and recording the current voltage of the low-voltage side of the distribution transformer.
Step 406, if it meetsThen jump to step 407; if it meetsThen the process jumps to step 408.
Step 407, executeAnd orderStep 402 is returned to.
Step 408, executeAnd orderStep 402 is returned to.
In the embodiment 1, according to the collected low-voltage side voltage of the distribution transformer, judging whether to execute a preset reactive power output regulation amount gradual progressive regulation task; if the low-voltage side voltage of the distribution transformer exceeds a preset voltage deviation allowable range, the reactive power output regulating quantity is used for initially regulating the valueAnd distributing the distributed photovoltaic power supplies to each distributed photovoltaic power supply in the platform area according to the equal proportion of the capacity of each distributed photovoltaic power supply in the platform area to trigger each distributed photovoltaic power supply in the platform area to execute a first round of regulation and control action.
After the first round of regulation and control actions of each distributed photovoltaic power supply in the transformer area are finished, if the voltage of the low-voltage side of the distribution transformer is within a preset voltage deviation allowable range, finishing the execution of a preset reactive power output regulation and control task in a gradual progressive mode; otherwise, based on the reactive power output regulating quantity corresponding to the regulating quantity progressive regulating operation of the first round, obtaining the reactive power output regulating quantity corresponding to the regulating quantity progressive regulating operation of the next round through progressive calculation; the reactive output adjustment quantity corresponding to the adjustment quantity progressive regulation operation of the next round is distributed to each distributed photovoltaic power supply in the platform area according to the equal proportion of the capacity of each distributed photovoltaic power supply in the platform area, so as to trigger each distributed photovoltaic power supply in the platform area to execute a new round of regulation action; and repeating the progressive regulation and control operation of the regulating quantity until the low-voltage side voltage of the distribution transformer is within a preset voltage deviation allowable range.
And 5, executing a preset reactive vibration reduction adjustment timing task. The preset reactive vibration damping adjustment timing task comprises vibration damping adjustment operation of a plurality of rounds; the vibration reduction regulation and control operation of each round is specifically as follows: and transmitting the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the current round to each distributed photovoltaic power supply in the platform region.
Specifically, the process of executing the preset reactive vibration reduction adjustment timing task comprises the following steps:
step 51, comparing the current time with the timing time Judging whether the timing time is reached; preferably, the timing time0.5-1.0H.
52, Executing vibration reduction regulation and control operation for a plurality of rounds when the timing time is reached; wherein, the process of executing vibration reduction regulation operation of a plurality of rounds comprises the following specific steps:
521, issuing vibration reduction regulation capacity proportion corresponding to vibration reduction regulation operation of the current round to each distributed photovoltaic power supply in the station area in a broadcast command mode; the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the current round is used for triggering each distributed photovoltaic power supply in the platform area to calculate and obtain reactive power output required by the vibration reduction regulation of the current round, and the regulation action is executed according to the reactive power output required by the vibration reduction regulation of the current round; the reactive power output process required by the current round vibration reduction regulation and control is calculated by each distributed photovoltaic power supply in the platform region specifically comprises the following steps:
Wherein, Is the first in the areaCalculated first step of table distributed photovoltaic power supplyReactive power output required by the vibration reduction regulation and control of the rounds; Is the first Damping control capacity ratio corresponding to the damping control operation of the round.
522, After the vibration reduction regulation operation of the current round is finished, judging whether the voltage of the low-voltage side of the distribution transformer is within a preset voltage deviation allowable range; if yes, go to step 523; otherwise, jump to step 524.
Step 523, transmitting the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the next round to each distributed photovoltaic power supply in the platform region.
And step 524, transmitting the opposite numbers of vibration reduction regulation capacity ratios corresponding to the vibration reduction regulation operation of the maximum round to each distributed photovoltaic power supply in the platform area.
More specifically, the algorithm implementation process of vibration reduction regulation operation of a plurality of rounds comprises the following steps:
step 501, initializing parameters.
Setting reactive vibration reduction regulation initial adjustment proportionAnd as the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the first round; setting the current round of vibration reduction regulation and control operation as; Setting the maximum rotation of vibration reduction regulation and control operation as; Defining a third voltage observation index as; When the vibration damping control operation of the first round is executed,。
If the low-voltage side voltage of the distribution transformer is lower than the preset nominal voltage, setting an initial adjustment proportion of reactive vibration reduction regulationNegative; if the voltage of the low-voltage side of the distribution transformer is higher than the preset nominal voltage, setting an initial adjustment proportion of reactive vibration reduction regulationIs positive; wherein, reactive vibration reduction regulation and control initial adjustment proportionAbsolute value of (2)Taking a value according to 1% -3% of the sum of the capacities of the distributed photovoltaic power supplies in the platform area; maximum rotation of vibration damping control operationIs related to the expected time for executing a preset reactive vibration reduction adjustment timing task。
Step 502, couple the firstAnd the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the turn is issued to each distributed photovoltaic power supply in the platform area in the form of a broadcast command.
Step 503, waiting for a preset time; Wherein the preset timeDepending on the time that each distributed photovoltaic power supply in the platform region completes one regulation action.
Step 504, execute; Observing the low-voltage side voltage of the distribution transformer; if it meetsEnding executing the preset reactive vibration reduction adjustment timing task, and recording the result of executing the preset reactive vibration reduction adjustment timing task as success; if the observed low-voltage side voltage of the distribution transformer is within the preset voltage deviation allowable range, thenOtherwise let。
Step 505, if it meetsReturning to step 502; if it meetsThen executeOrder-makingAnd returns to step 502.
In the embodiment 1, a preset reactive vibration reduction adjustment timing task is executed at fixed time under the command of a district intelligent fusion terminal; when the timing time arrives, if the time interval from the last timing time to the current timing time does not receive the reactive power output adjustment quantity instruction issued by the distribution automation master station system, and the voltage of the low-voltage side of the distribution transformer does not exceed the preset voltage deviation allowable range, starting to execute a preset reactive power vibration reduction adjustment timing task; and if the reactive power output adjustment quantity instruction issued by the power distribution automation master station system is received in the process of executing the preset reactive power vibration reduction adjustment timing task, immediately stopping executing the preset reactive power vibration reduction adjustment timing task, and starting to execute the reactive power output adjustment quantity instruction issued by the power distribution automation master station system.
By using the distributed photovoltaic power regulation and control method described in this embodiment 1, a process of regulating and controlling a certain station area in a district of a certain power supply company is taken as an example to verify the effectiveness of the regulation and control method, and specifically includes the following steps:
the distribution transformer of the example transformer area is in no-load voltage regulation, and the capacity is 100kVA; the platform area comprises 5 distributed photovoltaic power supply users, and the total grid-connected capacity is 152kWp; as shown in fig. 2, an equivalent circuit diagram of the power distribution network of the example transformer area is shown in fig. 2; as shown in table 1 below, the node load and branch impedance parameters for an example bay are given in table 1 below; the node 2, the node 3, the node 4, the node 8 and the node 9 are connected with a distributed photovoltaic power supply, and the node 0 is the low-voltage side of the distribution transformer of the transformer area; note that, in table 1 below, letter j represents an imaginary part.
Table 1 example node load and branch impedance parameters for a bay
Example simulation scenario: the reactive power output adjustment quantity instruction issued by the distribution automation master station system is not received at a certain moment, the preset reactive power output adjustment quantity gradual progressive adjustment and control task and the preset reactive power vibration reduction adjustment timing task are not executed, and at the moment, each distributed photovoltaic power supply in the platform area is output in a maximum power tracking mode according to a unit power factor, namely, each distributed photovoltaic power supply in the platform area is not adjusted and controlled by the distributed photovoltaic power supply adjustment and control method in the embodiment 1; the actual output and the voltage of each node of each distributed photovoltaic power supply in the example simulation scene area are shown in the following table 2; as can be seen from Table 2 below, the upper limit is the voltage at nodes 0-8.
Table 2 illustrates actual output of each distributed photovoltaic power supply and each node voltmeter in a simulation scene area
If the allowable voltage deviation range of the low-voltage side of the distribution transformer is within +/-6.3%, the allowable voltage deviation range of grid-connected points of each distributed photovoltaic power supply in the transformer area is within +/-7%, and the distributed photovoltaic power supply regulation and control method in the embodiment 1 is utilized for regulation, at the moment, the preset reactive power output regulation is executed to gradually progressively regulate and control tasks to implement regulation and control; wherein, the reactive output adjustment quantity is initially adjusted to be a valueAbsolute value of (2)Selected to be 15% of the sum of the capacities of the distributed photovoltaic power sources in the platform area.
After four times of regulation and control, the voltage deviation of the node 0 is not more than +/-6.3%, so that a preset control target is met; the voltage fluctuation curves of all nodes when the distributed photovoltaic power supply regulation and control method provided in the embodiment 1 is used for regulation and control are shown in a figure 3; in fig. 3, a curve a1 is a voltage fluctuation curve of each node in the foreground region, a curve a2 is a voltage fluctuation curve of each node in the background region for performing the adjustment amount progressive adjustment operation of the first round, a curve a3 is a voltage fluctuation curve of each node in the background region for performing the adjustment amount progressive adjustment operation of the second round, a curve a4 is a voltage fluctuation curve of each node in the background region for performing the adjustment amount progressive adjustment operation of the third round, a curve a5 is a voltage fluctuation curve of each node in the background region for performing the adjustment amount progressive adjustment operation of the fourth round, and a curve a6 is a control target.
According to the distributed photovoltaic power regulation and control system disclosed in embodiment 1, corresponding regulation and control tasks are implemented by receiving reactive power output regulation quantity instructions issued by a distribution automation master station system or according to a comparison result of low-voltage side voltage of a distribution transformer and a preset voltage deviation allowable range, so that the voltage of a power grid is ensured to be kept within a stable range; when the voltage of the low-voltage side of the distribution transformer exceeds a preset voltage deviation allowable range, a preset reactive power output adjustment quantity progressive regulation task is executed, reactive power output of the distributed photovoltaic power supply is gradually regulated through multiple rounds of adjustment quantity progressive regulation operation, great fluctuation of voltage is avoided, and voltage stability of a power grid is improved; the reactive output adjustment quantity corresponding to the current round adjustment quantity progressive adjustment operation is generated and transmitted to each distributed photovoltaic power supply in the platform area according to the progressive adjustment capacity proportion, so that the reasonable distribution of reactive output is realized; the reactive power output adjustment quantity corresponding to the adjustment quantity progressive adjustment operation of the next round is calculated from the reactive power output adjustment quantity corresponding to the adjustment quantity progressive adjustment operation of the current round, and the dynamic adjustment mechanism is utilized to better adapt to the actual running condition of the power grid, so that the accuracy and the efficiency of reactive power distribution are improved; when the voltage of the low-voltage side of the distribution transformer does not exceed the preset voltage deviation allowable range, executing a preset reactive vibration reduction adjustment timing task, reducing unnecessary reactive power output adjustment through vibration reduction adjustment operation, and further improving the running economy of the power grid; the reactive power output of the distributed photovoltaic power supply can be flexibly adjusted according to the actual running condition of the power grid, so that the flexibility and the controllability of the power grid system are improved; meanwhile, the photovoltaic receiving capacity of the power grid is improved through accurate regulation and control of the distributed photovoltaic power supply.
Example 2
As shown in fig. 4, embodiment 2 provides a distributed photovoltaic power regulation and control system, which includes a system regulation and control module, a voltage comparison module, a progressive regulation and control module, and a vibration reduction regulation and control module.
The system regulation and control module is used for monitoring an information channel between the distribution automation master station system and the intelligent fusion terminal of the transformer area and judging whether the intelligent fusion terminal of the transformer area receives a reactive output regulation quantity instruction issued by the distribution automation master station system; if yes, executing a reactive output adjustment quantity instruction issued by the power distribution automation master station system; otherwise, jumping to the voltage comparison module.
The voltage comparison module is used for acquiring the voltage of the low-voltage side of the distribution transformer and obtaining the voltage of the low-voltage side of the distribution transformer; and comparing the low-voltage side voltage of the distribution transformer with a preset voltage deviation allowable range.
The progressive regulation and control module is used for executing a preset reactive power output regulation and control task in a progressive mode if the low-voltage side voltage of the distribution transformer exceeds a preset voltage deviation allowable range; the preset reactive output regulation quantity gradual progressive regulation task comprises regulation quantity progressive regulation operations of a plurality of rounds; the adjustment quantity of each round is progressively adjusted and controlled, and the adjustment quantity comprises the following specific steps: generating and issuing progressive regulation capacity proportion of the current round to each distributed photovoltaic power supply in the platform region according to reactive output regulation corresponding to the progressive regulation operation of the regulation of the current round; the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the next round is calculated by the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the current round.
The vibration reduction regulation module is used for executing a preset reactive vibration reduction regulation timing task if the voltage of the low-voltage side of the distribution transformer does not exceed a preset voltage deviation allowable range; the preset reactive vibration damping adjustment timing task comprises vibration damping adjustment operation of a plurality of rounds; the vibration reduction regulation and control operation of each round is specifically as follows: and transmitting the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the current round to each distributed photovoltaic power supply in the platform region.
Example 3
As shown in fig. 5, embodiment 3 provides a method and apparatus for regulating and controlling a distributed photovoltaic power, including: a processor, a memory, and a computer program stored in the memory and executable on the processor, such as a distributed photovoltaic power regulation method program; the communication interface in fig. 5 is used for accessing an external device to obtain data.
The steps of the above-mentioned distributed photovoltaic power regulation method are implemented when the processor executes the computer program, for example: and monitoring an information channel between the power distribution automation master station system and the intelligent fusion terminal of the platform area, and judging whether the intelligent fusion terminal of the platform area receives a reactive output regulation quantity instruction issued by the power distribution automation master station system. If yes, executing a reactive output adjustment quantity instruction issued by the power distribution automation master station system; otherwise, collecting the voltage of the low-voltage side of the distribution transformer to obtain the voltage of the low-voltage side of the distribution transformer; and comparing the low-voltage side voltage of the distribution transformer with a preset voltage deviation allowable range. If the low-voltage side voltage of the distribution transformer exceeds a preset voltage deviation allowable range, executing a preset reactive power output adjustment quantity gradual progressive regulation task; the preset reactive output regulation quantity gradual progressive regulation task comprises regulation quantity progressive regulation operations of a plurality of rounds; the adjustment quantity of each round is progressively adjusted and controlled, and the adjustment quantity comprises the following specific steps: generating and issuing progressive regulation capacity proportion of the current round to each distributed photovoltaic power supply in the platform region according to reactive output regulation corresponding to the progressive regulation operation of the regulation of the current round; the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the next round is calculated by the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the current round. If the low-voltage side voltage of the distribution transformer does not exceed the preset voltage deviation allowable range, executing a preset reactive vibration reduction adjustment timing task; the preset reactive vibration damping adjustment timing task comprises vibration damping adjustment operation of a plurality of rounds; the vibration reduction regulation and control operation of each round is specifically as follows: and transmitting the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the current round to each distributed photovoltaic power supply in the platform region.
Or the processor, when executing the computer program, performs the functions of the modules in the system, for example:
The system regulation and control module is used for monitoring an information channel between the distribution automation master station system and the intelligent fusion terminal of the transformer area and judging whether the intelligent fusion terminal of the transformer area receives a reactive output regulation quantity instruction issued by the distribution automation master station system; if yes, executing a reactive output adjustment quantity instruction issued by the power distribution automation master station system; otherwise, jumping to the voltage comparison module. The voltage comparison module is used for acquiring the voltage of the low-voltage side of the distribution transformer and obtaining the voltage of the low-voltage side of the distribution transformer; and comparing the low-voltage side voltage of the distribution transformer with a preset voltage deviation allowable range. The progressive regulation and control module is used for executing a preset reactive power output regulation and control task in a progressive mode if the low-voltage side voltage of the distribution transformer exceeds a preset voltage deviation allowable range; the preset reactive output regulation quantity gradual progressive regulation task comprises regulation quantity progressive regulation operations of a plurality of rounds; the adjustment quantity of each round is progressively adjusted and controlled, and the adjustment quantity comprises the following specific steps: generating and issuing progressive regulation capacity proportion of the current round to each distributed photovoltaic power supply in the platform region according to reactive output regulation corresponding to the progressive regulation operation of the regulation of the current round; the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the next round is calculated by the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the current round. The vibration reduction regulation module is used for executing a preset reactive vibration reduction regulation timing task if the voltage of the low-voltage side of the distribution transformer does not exceed a preset voltage deviation allowable range; the preset reactive vibration damping adjustment timing task comprises vibration damping adjustment operation of a plurality of rounds; the vibration reduction regulation and control operation of each round is specifically as follows: and transmitting the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the current round to each distributed photovoltaic power supply in the platform region.
The computer program may be divided into one or more modules/units, which are stored in the memory and executed by the processor to accomplish the present invention, for example. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program in the distributed photovoltaic power conditioning method apparatus.
For example, the computer program may be divided into a system regulation module, a voltage comparison module, a progressive regulation module, and a vibration reduction regulation module, where each module specifically functions as follows:
The system regulation and control module is used for monitoring an information channel between the distribution automation master station system and the intelligent fusion terminal of the transformer area and judging whether the intelligent fusion terminal of the transformer area receives a reactive output regulation quantity instruction issued by the distribution automation master station system; if yes, executing a reactive output adjustment quantity instruction issued by the power distribution automation master station system; otherwise, jumping to the voltage comparison module. The voltage comparison module is used for acquiring the voltage of the low-voltage side of the distribution transformer and obtaining the voltage of the low-voltage side of the distribution transformer; and comparing the low-voltage side voltage of the distribution transformer with a preset voltage deviation allowable range. The progressive regulation and control module is used for executing a preset reactive power output regulation and control task in a progressive mode if the low-voltage side voltage of the distribution transformer exceeds a preset voltage deviation allowable range; the preset reactive output regulation quantity gradual progressive regulation task comprises regulation quantity progressive regulation operations of a plurality of rounds; the adjustment quantity of each round is progressively adjusted and controlled, and the adjustment quantity comprises the following specific steps: generating and issuing progressive regulation capacity proportion of the current round to each distributed photovoltaic power supply in the platform region according to reactive output regulation corresponding to the progressive regulation operation of the regulation of the current round; the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the next round is calculated by the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the current round. The vibration reduction regulation module is used for executing a preset reactive vibration reduction regulation timing task if the voltage of the low-voltage side of the distribution transformer does not exceed a preset voltage deviation allowable range; the preset reactive vibration damping adjustment timing task comprises vibration damping adjustment operation of a plurality of rounds; the vibration reduction regulation and control operation of each round is specifically as follows: and transmitting the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the current round to each distributed photovoltaic power supply in the platform region.
The distributed photovoltaic power regulation and control method equipment can be computing equipment such as desktop computers, notebooks, palm computers and cloud servers. The distributed photovoltaic power conditioning method apparatus may include, but is not limited to, a processor, a memory. It will be appreciated by those skilled in the art that the schematic diagram of fig. 5 is merely an example of a distributed photovoltaic power conditioning method apparatus, and is not meant to limit the distributed photovoltaic power conditioning method apparatus, and may include more or less components than illustrated, or may combine certain components, or different components, e.g., the distributed photovoltaic power conditioning method apparatus may further include an input/output apparatus, a network access apparatus, a bus, etc.
The processor may be a central processing unit (CentralProcessingUnit, CPU), or other general purpose processor, digital signal processor (DigitalSignalProcessor, DSP), application specific integrated circuit (ApplicationSpecificIntegratedCircuit, ASIC), off-the-shelf programmable gate array (Field-ProgrammableGateArray, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, and the processor is a control center of the distributed photovoltaic power supply control method device, and various interfaces and lines are used to connect various parts of the entire distributed photovoltaic power supply control method device.
The memory may be used to store the computer program and/or module, and the processor may implement various functions of the distributed photovoltaic power regulation method apparatus by running or executing the computer program and/or module stored in the memory and invoking data stored in the memory.
The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart memory card (SMARTMEDIACARD, SMC), secure digital (SecureDigital, SD) card, flash memory card (FLASHCARD), at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.
Example 4
Embodiment 4 also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the distributed photovoltaic power regulation method.
The modules/units of the distributed photovoltaic power conditioning method apparatus integration, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
Based on such understanding, the implementation of all or part of the flow of the above-mentioned distributed photovoltaic power control method in embodiment 4 may also be accomplished by instructing related hardware through a computer program, where the computer program may be stored in a computer readable storage medium, and the computer program may implement the steps of the above-mentioned distributed photovoltaic power control method when executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc.
The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer memory, a Read-only memory (ROM), a random access memory (RAM, randomAccessMemory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth.
It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
According to the invention, the low-voltage side voltage of the distribution transformer is monitored and compared with the preset voltage deviation allowable range, if the voltage deviation allowable range is exceeded, the preset reactive output adjustment quantity is executed to progressively adjust and control tasks successively, the reactive output of each distributed photovoltaic power supply in the transformer area is adjusted and controlled in multiple rounds, the low-voltage side voltage of the distribution transformer is ensured to be maintained within the allowable range, the overvoltage problem caused by photovoltaic access of a large number of transformer areas is effectively solved, and the electricity consumption quality of users is improved; if the low-voltage side voltage of the distribution transformer does not exceed the preset voltage deviation allowable range, executing a preset reactive vibration reduction adjustment timing task, reducing unnecessary reactive power output adjustment through vibration reduction adjustment operation, and effectively improving the running economy of the power grid.
The above embodiment is only one of the implementation manners capable of implementing the technical solution of the present invention, and the scope of the claimed invention is not limited to the embodiment, but also includes any changes, substitutions and other implementation manners easily recognized by those skilled in the art within the technical scope of the present invention.
Claims (10)
1. A method for regulating and controlling a distributed photovoltaic power supply, comprising the steps of:
Judging whether a reactive output adjustment quantity instruction issued by a power distribution automation master station system is received or not; if yes, executing a reactive output adjustment quantity instruction issued by the power distribution automation master station system; otherwise, obtaining the low-voltage side voltage of the distribution transformer and comparing the low-voltage side voltage with a preset voltage deviation allowable range;
If the low-voltage side voltage of the distribution transformer exceeds a preset voltage deviation allowable range, executing a preset reactive power output adjustment quantity gradual progressive regulation task; the preset reactive output regulation quantity gradual progressive regulation task comprises regulation quantity progressive regulation operations of a plurality of rounds; the adjustment quantity of each round is progressively adjusted and controlled, and the adjustment quantity comprises the following specific steps: generating and issuing progressive regulation capacity proportion of the current round to each distributed photovoltaic power supply in the platform region according to reactive output regulation corresponding to the progressive regulation operation of the regulation of the current round; the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the next round is calculated from the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the current round;
If the low-voltage side voltage of the distribution transformer does not exceed the preset voltage deviation allowable range, executing a preset reactive vibration reduction adjustment timing task; the preset reactive vibration damping adjustment timing task comprises vibration damping adjustment operation of a plurality of rounds; the vibration reduction regulation and control operation of each round is specifically as follows: and transmitting the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the current round to each distributed photovoltaic power supply in the platform region.
2. The method for regulating and controlling a distributed photovoltaic power supply according to claim 1, wherein the process of executing the reactive power regulation quantity command issued by the distribution automation master station system comprises the following specific steps:
And responding to reactive output regulation quantity instructions issued by the distribution automation master station system, and generating and issuing a capacity regulation and control ratio of the system to each distributed photovoltaic power supply in the platform area.
3. The method for regulating and controlling a distributed photovoltaic power supply according to claim 1, wherein the step of executing the preset reactive power regulation amount progressive regulation task comprises the following specific steps:
Generating and issuing progressive regulation capacity proportion of the current round to each distributed photovoltaic power supply in the platform area according to reactive output regulation quantity corresponding to progressive regulation operation of the regulation quantity of the current round and the capacity equal proportion of each distributed photovoltaic power supply in the platform area;
After the execution of the current round of adjustment quantity progressive regulation operation is finished, judging whether the low-voltage side voltage of the distribution transformer is within a preset voltage deviation allowable range or not;
If yes, finishing executing the preset reactive output adjustment quantity gradual progressive regulation task;
Otherwise, calculating reactive output adjustment quantity corresponding to the adjustment quantity progressive regulation operation of the next round by using reactive output adjustment quantity corresponding to the adjustment quantity progressive regulation operation of the current round; and executing the next round of adjustment quantity progressive regulation and control operation according to the reactive output adjustment quantity corresponding to the next round of adjustment quantity progressive regulation and control operation, until the low-voltage side voltage of the distribution transformer is within a preset voltage deviation allowable range.
4. The method for regulating and controlling a distributed photovoltaic power supply according to claim 1, wherein the process of executing the preset reactive vibration reduction regulation timing task comprises the following specific steps:
comparing the current time with the timing time, and judging whether the timing time is reached;
When the timing time arrives, vibration damping regulation operations are performed for a plurality of rounds.
5. The method of claim 4, wherein the vibration damping control operation is performed in a plurality of rounds, comprising the steps of:
transmitting vibration reduction regulation capacity proportion corresponding to vibration reduction regulation operation of the current round to each distributed photovoltaic power supply in the platform region;
After the vibration reduction regulation operation of the current round is finished, judging whether the voltage of the low-voltage side of the distribution transformer is within a preset voltage deviation allowable range or not;
if yes, the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the next round is transmitted to each distributed photovoltaic power supply in the platform area;
Otherwise, the opposite numbers of the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the maximum round are sent to each distributed photovoltaic power supply in the platform area.
6. The method according to claim 4, wherein the timing time is 0.5-1.0h, and the maximum number of vibration reduction control operations is 10-20.
7. The method for regulating and controlling a distributed photovoltaic power supply according to claim 1, wherein the maximum number of times of the progressive regulating and controlling operation of the regulating amount is 5 to 10 times.
8. A distributed photovoltaic power regulation system, comprising:
The system regulation and control module is used for judging whether a reactive output regulation quantity instruction issued by the power distribution automation master station system is received or not; if yes, executing a reactive output adjustment quantity instruction issued by the power distribution automation master station system; otherwise, jumping to a voltage comparison module;
The voltage comparison module is used for acquiring the voltage of the low-voltage side of the distribution transformer and comparing the voltage with a preset voltage deviation allowable range;
The progressive regulation and control module is used for executing a preset reactive power output regulation and control task in a progressive mode if the low-voltage side voltage of the distribution transformer exceeds a preset voltage deviation allowable range; the preset reactive output regulation quantity gradual progressive regulation task comprises regulation quantity progressive regulation operations of a plurality of rounds; the adjustment quantity of each round is progressively adjusted and controlled, and the adjustment quantity comprises the following specific steps: generating and issuing progressive regulation capacity proportion of the current round to each distributed photovoltaic power supply in the platform region according to reactive output regulation corresponding to the progressive regulation operation of the regulation of the current round; the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the next round is calculated from the reactive output regulating quantity corresponding to the regulating quantity progressive regulating operation of the current round;
The vibration reduction regulation module is used for executing a preset reactive vibration reduction regulation timing task if the voltage of the low-voltage side of the distribution transformer does not exceed a preset voltage deviation allowable range; the preset reactive vibration damping adjustment timing task comprises vibration damping adjustment operation of a plurality of rounds; the vibration reduction regulation and control operation of each round is specifically as follows: and transmitting the vibration reduction regulation capacity proportion corresponding to the vibration reduction regulation operation of the current round to each distributed photovoltaic power supply in the platform region.
9. A distributed photovoltaic power regulation device, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the distributed photovoltaic power regulation method according to any one of claims 1 to 7 when executing said computer program.
10. A computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the steps of the distributed photovoltaic power regulation method of any of claims 1-7.
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| CN115995879A (en) * | 2022-11-28 | 2023-04-21 | 国网陕西省电力有限公司电力科学研究院 | Distributed power coordination control system |
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| CN116742697B (en) * | 2023-05-18 | 2024-08-09 | 国网湖北省电力有限公司随州供电公司 | Large-scale photovoltaic power station upward compatible voltage coordination control method and system |
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| CN115995879A (en) * | 2022-11-28 | 2023-04-21 | 国网陕西省电力有限公司电力科学研究院 | Distributed power coordination control system |
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