CN113193591A - Safe operation control system and method for renewable power supply access node - Google Patents

Safe operation control system and method for renewable power supply access node Download PDF

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Publication number
CN113193591A
CN113193591A CN202110432667.9A CN202110432667A CN113193591A CN 113193591 A CN113193591 A CN 113193591A CN 202110432667 A CN202110432667 A CN 202110432667A CN 113193591 A CN113193591 A CN 113193591A
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power
access node
power generation
branch
node
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衣涛
王艳杰
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Shanghai Dianji University
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2113/00—Details relating to the application field
    • G06F2113/04—Power grid distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Abstract

The invention relates to a system and a method for controlling the safe operation of renewable power supply access nodes, wherein the system comprises a power generation management module, a safety evaluation module and a renewable power supply regulation and control terminal of each access node; the method comprises the steps that a power generation management module acquires power generation information of an access node, wherein the power generation information comprises node voltage, branch impedance and active power; the safety evaluation module calculates branch current through a power network branch equation according to the power generation information, and calculates the power generation power safety margin of the access node through a safety margin calculation formula; lambda is judged by the power generation management moduleiIf the power is larger than 0, the operation safety of the ith access node is judged if the power is larger than 0, otherwise, the generated power of the access node is adjusted to ensure that the lambda is ensurediGreater than 0. Compared with the prior art, the method does not need to gradually approach to the safety critical point through tentative calculation, and has high operation speed and high accuracy.

Description

Safe operation control system and method for renewable power supply access node
Technical Field
The invention relates to the field of electric power system operation safety evaluation, in particular to a system and a method for controlling the safe operation of a renewable power supply access node.
Background
With the development and utilization of renewable energy sources vigorously promoted in the whole society, a great deal of renewable energy source bases represented by wind power and photovoltaic are built, and the grid-connected operation of large-scale renewable power sources is realized. The renewable power supply grid connection can also bring new problems while solving the energy crisis, such as the difficulty in controlling the output of the renewable power supply due to the influence of environmental factors, the improvement of the requirement on a standby power supply, the difficulty in arranging the operation mode of a dispatching operation department and the like. The utilization and consumption of renewable energy sources are concerned, and the operation safety of a power grid after the renewable power source is connected to the grid is also concerned, from the perspective of safe operation of a power system, each load section has a safe operation critical point, and the distance from the current operation state to the safe operation critical point represents the safety margin of the system.
However, the existing voltage safety and stability boundary model of the renewable energy source accessed to the power grid is difficult to establish, the model observability is not strong, the voltage safety evaluation error of the renewable energy source access point is larger, a more accurate voltage safety regulation and control strategy cannot be provided for dispatching personnel, and particularly under the condition that the renewable power source grid connection has larger uncertainty, the system safety problem is more prominent.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a system and a method for controlling the safe operation of a renewable power access node, which do not need to gradually approach to a safe critical point through tentative calculation, have high operation speed and high accuracy.
The purpose of the invention can be realized by the following technical scheme:
a safe operation control system of a renewable power supply access node is used for carrying out safety evaluation on the power generation power of a renewable power supply under the condition that the renewable power supply is accessed to a power grid, and comprises a power generation management module, a safety evaluation module and a renewable power supply regulation and control terminal of each access node;
the power generation management module acquires power generation information of an access node, wherein the power generation information comprises node voltage, branch impedance and active power;
the safety evaluation module calculates branch current through a power network branch equation according to the power generation information, and calculates the power generation power safety margin of the access node through a safety margin calculation formula;
the safety margin calculation formula is as follows:
Figure BDA0003031981370000021
wherein, i, j is 1,2, N is access node sequence number, λiIs the generated power safety margin, V, of the ith access nodei0Node voltage of ith access node
Figure BDA0003031981370000027
Measured value of piIs the active power of the ith access node, L is 1,2, L is the branch serial number,
Figure BDA0003031981370000022
and
Figure BDA0003031981370000023
branch current for access node
Figure BDA0003031981370000024
The safety margin represents the distance between the generated power of the access node and the safety critical power of the power system;
the power generation management module judges lambdaiIf the power is larger than 0, the operation safety of the ith access node is judged if the power is larger than 0, otherwise, the generated power of the access node is adjusted to ensure that the lambda is ensurediAnd if the voltage is larger than 0, the power grid is returned to a safe area again, so that the aims of reducing the safety risk of the access of the renewable power supply and ensuring the safe and economic operation of the power grid are fulfilled.
The node voltage and the branch current are used as calculation variables, the generated power safety margin of the access node is directly calculated according to a safety margin calculation formula, the approach to a safety critical point step by step is not needed through tentative calculation, the calculation speed is high, and the accuracy is high.
Further, the branch equation of the power network is as follows:
Figure BDA0003031981370000025
wherein e isiAnd fiFor access nodei node voltage
Figure BDA0003031981370000026
Real and imaginary parts of, Zij＝Rij+jXijIs the branch impedance of the access node i.
The system further comprises a data correction module, wherein the data correction module corrects the node voltage and the branch circuit current of each access node through a correction step, and the safety evaluation module calculates the generating power safety margin according to the corrected node voltage and the corrected branch circuit current;
the correction steps are specifically as follows:
forming a Jacobian matrix through a power network branch equation and a power network safe operation critical equation, performing iterative solution through a Newton method until the solution error is smaller than a set value, obtaining the node voltage and branch current correction values of each access node, and correcting the node voltage and the branch current according to the correction values.
Further, the critical equation for safe operation of the power network is as follows:
Figure BDA0003031981370000031
wherein e isiAnd fiNode voltage for access node i
Figure BDA0003031981370000032
Real and imaginary parts of, ViIs the node voltage
Figure BDA0003031981370000033
The amplitude of (c).
Further, the system also comprises a data processing module, wherein the data processing module comprises a data storage unit and a data display unit, the data storage unit is used for storing historical data of the generated power safety margin, and the data display unit is used for displaying current data and historical data of the generated power safety margin.
A safe operation control method for a renewable power supply access node comprises the following steps:
collecting power generation information of an access node, wherein the power generation information comprises node voltage, branch impedance and active power;
according to the power generation information, calculating branch current through a power network branch equation, and calculating the power generation power safety margin of the access node through a safety margin calculation formula;
the safety margin calculation formula is as follows:
Figure BDA0003031981370000034
wherein, i, j is 1,2, N is access node sequence number, λiIs the generated power safety margin, V, of the ith access nodei0Node voltage of ith access node
Figure BDA0003031981370000035
Measured value of piIs the active power of the ith access node, L is 1,2, L is the branch serial number,
Figure BDA0003031981370000036
and
Figure BDA0003031981370000037
branch current for access node
Figure BDA0003031981370000038
The safety margin represents the distance between the generated power of the access node and the safety critical power of the power system;
determine lambdaiIf the power generation is larger than 0, the operation safety of the ith access node is judged if the power generation is larger than 0, otherwise, the power generation management module enables lambda to be ensured by adjusting the power generation power of the access nodeiAnd if the voltage is larger than 0, the power grid is returned to a safe area again, so that the aims of reducing the safety risk of the access of the renewable power supply and ensuring the safe and economic operation of the power grid are fulfilled.
The node voltage and the branch current are used as calculation variables, the generated power safety margin of the access node is directly calculated according to a safety margin calculation formula, the approach to a safety critical point step by step is not needed through tentative calculation, the calculation speed is high, and the accuracy is high.
Further, the branch equation of the power network is as follows:
Figure BDA0003031981370000039
wherein e isiAnd fiNode voltage for access node i
Figure BDA0003031981370000041
Real and imaginary parts of, Zij＝Rij+jXijIs the branch impedance of the access node i.
Further, node voltage and branch current of each access node are corrected through a correction step, and a generating power safety margin is calculated according to the corrected node voltage and branch current;
the correction steps are specifically as follows:
forming a Jacobian matrix through a power network branch equation and a power network safe operation critical equation, performing iterative solution through a Newton method until the solution error is smaller than a set value, obtaining the node voltage and branch current correction values of each access node, and correcting the node voltage and the branch current according to the correction values.
Further, the critical equation for safe operation of the power network is as follows:
Figure BDA0003031981370000042
wherein e isiAnd fiNode voltage for access node i
Figure BDA0003031981370000043
Real and imaginary parts of, ViIs the node voltage
Figure BDA0003031981370000044
The amplitude of (c).
Further, historical data of the generated power safety margin is stored, and current data and the historical data of the generated power safety margin are displayed.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention collects the power generation information of an access node, the power generation information comprises node voltage, branch impedance and active power, the branch current is calculated through a power network branch equation according to the power generation information, the power generation power safety margin of the access node is calculated through a safety margin calculation formula, the power generation power safety margin represents the distance between the power generation power of the access node and the safety critical power of a power system, the power generation power of an accessed renewable power supply is taken as a calculation target, the safety risk of the access of the renewable power supply can be judged according to the size of the power generation power safety margin, the safe and economic operation of a power grid is ensured, meanwhile, the power generation power safety margin takes the node voltage and the branch current as calculation variables, the power generation power safety margin of the access node is directly calculated according to the safety margin calculation formula without approaching to the safety critical point step by step through tentative calculation, the operation speed is high, and the accuracy is high;
(2) the Jacobian matrix is formed by the branch equation of the power network and the safe operation critical equation of the power network, iterative solution is carried out by the Newton method until the solution error is smaller than a set value, the node voltage and the branch current of each access node are obtained, the node voltage and the branch current are corrected according to the correction value, the generating power safety margin is calculated according to the corrected node voltage and the corrected branch current, and the accuracy of the calculation result is high.
Drawings
FIG. 1 is a flow chart of a voltage safety evaluation method.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
The method comprises the steps of carrying out networked modeling on various renewable power sources in a regional power network to form a power network topological structure which takes the various renewable power sources as access nodes and is connected among the access nodes by branches to form a renewable power source networked model, wherein the renewable power sources comprise a wind turbine generator set, a photovoltaic generator set, a hydroelectric generator set and the like.
Example 1
A safe operation control system of a renewable power supply access node is used for carrying out safety evaluation on the power generation power of a renewable power supply under the condition that the renewable power supply is accessed to a power grid, and comprises a power generation management module, a safety evaluation module, a data correction module, a data processing module and a renewable power supply regulation and control terminal of each access node;
the power generation management module is arranged in a centralized control center of the renewable power supply, comprises a computer, a communication device, a data acquisition device, a sensor and the like, and is used for acquiring power generation information transmitted by a renewable power supply regulation and control terminal arranged at an access node, wherein the power generation information comprises node voltage, node voltage amplitude, node phase angle, branch impedance, active power, reactive power, power factor, switch on-off state and communication channel state;
the safety evaluation module calculates branch current through a power network branch equation according to the power generation information;
the data correction module corrects the node voltage and the branch current of each access node through the correction step;
the safety evaluation module calculates the generated power safety margin of the access node through a safety margin calculation formula according to the corrected node voltage and the branch current;
the safety margin calculation formula is as follows:
Figure BDA0003031981370000051
wherein, i, j is 1,2, N is access node sequence number, λiIs the generated power safety margin, V, of the ith access nodei0Node voltage of ith access node
Figure BDA0003031981370000052
Measured value of piIs the active power of the ith access node, L is 1,2, L is the branch serial number,
Figure BDA0003031981370000061
and
Figure BDA0003031981370000062
branch current for access node
Figure BDA0003031981370000063
The real and imaginary parts of (c);
lambda is judged by the power generation management moduleiWhether the power generation capacity is larger than 0 or not is judged, if yes, the operation safety of the ith access node is judged, otherwise, a regulation and control instruction is sent to the renewable power supply regulation and control terminal, and after the renewable power supply regulation and control terminal receives the regulation and control instruction, the power generation capacity of the access node is adjusted to enable lambda to be obtainediAnd if the voltage is greater than 0, the power grid returns to the safe region, the operation safety of the power grid can be improved, the economic benefit and the social benefit of the operation of the power grid are further improved, and the renewable power supply regulation and control terminal feeds back the regulation and control result to the power generation management module.
The data processing module comprises a data storage unit and a data display unit, the data storage unit is used for storing historical data of the generated power safety margin, and the data display unit is used for displaying current data and historical data of the generated power safety margin, so that personnel can conveniently check the data.
The node voltage and the branch current are used as calculation variables, the generated power safety margin of the access node is directly calculated according to a safety margin calculation formula, the approach to a safety critical point step by step is not needed through tentative calculation, the calculation speed is high, and the accuracy is high.
The branch equation of the power network is as follows:
Figure BDA0003031981370000064
wherein e isiAnd fiNode voltage for access node i
Figure BDA0003031981370000065
Real and imaginary parts of, Zij＝Rij+jXijIs the branch impedance of the access node i.
The correction steps are specifically as follows:
forming a Jacobian matrix through a power network branch equation and a power network safe operation critical equation, performing iterative solution through a Newton method until the solution error is less than 0.0001, obtaining the correction values of the node voltage and the branch current of each access node, and correcting the node voltage and the branch current according to the correction values.
The critical equation of the safe operation of the power network is as follows:
Figure BDA0003031981370000066
wherein e isiAnd fiNode voltage for access node i
Figure BDA0003031981370000067
Real and imaginary parts of, ViIs the node voltage
Figure BDA0003031981370000068
The amplitude of (c).
Example 2
A method for controlling the safe operation of a renewable power access node, as shown in fig. 1, includes:
1) collecting power generation information of an access node, wherein the power generation information comprises node voltage, branch impedance and active power;
2) calculating branch current through a power network branch equation according to the power generation information;
3) the node voltage and the branch current of each access node are corrected by the correction step,
4) calculating the safety margin of the generating power according to the corrected node voltage and the branch current;
the safety margin calculation formula is as follows:
Figure BDA0003031981370000071
wherein, i, j is 1,2, N is access node sequence number, λiIs the generated power safety margin, V, of the ith access nodei0Node voltage of ith access node
Figure BDA0003031981370000072
Measured value of piIs the active power of the ith access node, L is 1,2, L is the branch serial number,
Figure BDA0003031981370000073
and
Figure BDA0003031981370000074
branch current for access node
Figure BDA0003031981370000075
The real and imaginary parts of (c);
5) determine lambdaiIf the power is larger than 0, the operation safety of the ith access node is judged if the power is larger than 0, otherwise, the generated power of the corresponding access node is adjusted to ensure that the lambda is ensurediAnd if the voltage is larger than 0, the power grid is returned to the safe area.
The branch equation of the power network is as follows:
Figure BDA0003031981370000076
wherein e isiAnd fiNode voltage for access node i
Figure BDA0003031981370000077
Real and imaginary parts of, Zij＝Rij+jXijIs the branch impedance of the access node i.
Storing historical data of the generated power safety margin, and displaying the current data and the historical data of the generated power safety margin through a monitor;
the correction steps are specifically as follows:
forming a Jacobian matrix through a power network branch equation and a power network safe operation critical equation, carrying out iteration solution through a Newton method, finishing iteration when the solution error is less than 0.0001, obtaining the node voltage of each access node and the correction value of branch current, and correcting the node voltage and the branch current according to the correction value.
The critical equation of the safe operation of the power network is as follows:
Figure BDA0003031981370000081
wherein e isiAnd fiNode voltage for access node i
Figure BDA0003031981370000082
Real and imaginary parts of, ViIs the node voltage
Figure BDA0003031981370000083
The amplitude of (c).
The embodiment 1 and the embodiment 2 provide a system and a method for controlling the safe operation of a renewable power supply access node, wherein node voltage and branch current are used as calculation variables, the power generation power of the renewable power supply is accessed as a calculation target, the safety of the power generation power of the renewable power supply accessed to a power grid is evaluated, the problem of reasonable utilization of renewable energy sources is explored from the perspective of safe operation of a power system, the approach to a safe critical point step by step through tentative calculation is not needed, the operation speed is high, and the accuracy is high.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. A safe operation control system of a renewable power supply access node is characterized by comprising a power generation management module and a safety evaluation module;
the power generation management module acquires power generation information of a renewable power supply regulation and control terminal of an access node, wherein the power generation information comprises node voltage, branch impedance and active power;
the safety evaluation module calculates branch current through a power network branch equation according to the power generation information, and calculates the power generation power safety margin of the access node through a safety margin calculation formula;
the safety margin calculation formula is as follows:
Figure FDA0003031981360000011
wherein, i, j is 1,2, N is access node sequence number, λiIs the generated power safety margin, V, of the ith access nodei0Node voltage of ith access node
Figure FDA0003031981360000012
Measured value of piIs the active power of the ith access node, L is 1,2, L is the branch serial number,
Figure FDA0003031981360000013
and
Figure FDA0003031981360000014
branch current for access node
Figure FDA0003031981360000015
The real and imaginary parts of (c);
the power generation management module judges lambdaiIf it is greater than 0, if so, it is determinedThe ith access node is determined to run safely, otherwise, the generated power of the access node is adjusted to ensure that the lambda is ensurediGreater than 0.
2. The system of claim 1, wherein the electrical network branch equation comprises:
Figure FDA0003031981360000016
wherein e isiAnd fiNode voltage for access node i
Figure FDA0003031981360000017
Real and imaginary parts of, Zij＝Rij+jXijIs the branch impedance of the access node i.
3. The system according to claim 1, further comprising a data modification module, wherein the data modification module modifies the node voltage and the branch current of each access node through a modification step, and the safety evaluation module calculates the power generation safety margin according to the modified node voltage and branch current;
the correction steps are specifically as follows:
forming a Jacobian matrix through a power network branch equation and a power network safe operation critical equation, performing iterative solution through a Newton method until the solution error is smaller than a set value, obtaining the node voltage and branch current correction values of each access node, and correcting the node voltage and the branch current according to the correction values.
4. The system according to claim 3, wherein the critical equation for safe operation of the power network is:
Figure FDA0003031981360000021
wherein e isiAnd fiNode voltage for access node i
Figure FDA0003031981360000022
Real and imaginary parts of, ViIs the node voltage
Figure FDA0003031981360000023
The amplitude of (c).
5. The system of claim 1, further comprising a data processing module, wherein the data processing module comprises a data storage unit and a data display unit, the data storage unit is configured to store historical data of the generated power safety margin, and the data display unit is configured to display current data and historical data of the generated power safety margin.
6. A safe operation control method for a renewable power supply access node is characterized by comprising the following steps:
collecting power generation information of a renewable power supply regulation and control terminal of an access node, wherein the power generation information comprises node voltage, branch impedance and active power;
according to the power generation information, calculating branch current through a power network branch equation, and calculating the power generation power safety margin of the access node through a safety margin calculation formula;
the safety margin calculation formula is as follows:
Figure FDA0003031981360000024
wherein, i, j is 1,2, N is access node sequence number, λiIs the generated power safety margin, V, of the ith access nodei0Is the ith connectionNode voltage of the input node
Figure FDA0003031981360000025
Measured value of piIs the active power of the ith access node, L is 1,2, L is the branch serial number,
Figure FDA0003031981360000026
and
Figure FDA0003031981360000027
branch current for access node
Figure FDA0003031981360000028
The real and imaginary parts of (c);
determine lambdaiIf the power generation is larger than 0, the operation safety of the ith access node is judged if the power generation is larger than 0, otherwise, the power generation management module enables lambda to be ensured by adjusting the power generation power of the access nodeiGreater than 0.
7. The method of claim 6, wherein the power network branch equation is:
Figure FDA0003031981360000031
wherein e isiAnd fiNode voltage for access node i
Figure FDA0003031981360000035
Real and imaginary parts of, Zij＝Rij+jXijIs the branch impedance of the access node i.
8. The method for controlling the safe operation of the access node of the renewable power source as claimed in claim 6, wherein the node voltage and the branch current of each access node are corrected by the correcting step, and the generating power safety margin is calculated according to the corrected node voltage and the branch current;
the correction steps are specifically as follows:
forming a Jacobian matrix through a power network branch equation and a power network safe operation critical equation, performing iterative solution through a Newton method until the solution error is smaller than a set value, obtaining the node voltage and branch current correction values of each access node, and correcting the node voltage and the branch current according to the correction values.
9. The method according to claim 8, wherein the power network safe operation critical equation is:
Figure FDA0003031981360000032
wherein e isiAnd fiNode voltage for access node i
Figure FDA0003031981360000033
Real and imaginary parts of, ViIs the node voltage
Figure FDA0003031981360000034
The amplitude of (c).
10. The method of claim 6, wherein historical data of the generated power safety margin is stored, and current data and historical data of the generated power safety margin are displayed.
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CN108428050A (en) * 2018-03-01 2018-08-21 上海电机学院 A kind of regulator control system and method for extensive regenerative resource access power grid
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