CN112117774B - DC group control method and system for multi-DC combined modulation - Google Patents

DC group control method and system for multi-DC combined modulation Download PDF

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Publication number
CN112117774B
CN112117774B CN202010863512.6A CN202010863512A CN112117774B CN 112117774 B CN112117774 B CN 112117774B CN 202010863512 A CN202010863512 A CN 202010863512A CN 112117774 B CN112117774 B CN 112117774B
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power
receiving
direct current
lifting
power grid
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CN112117774A (en
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云雷
周勤勇
梁正玉
邵瑶
赵珊珊
施浩波
李强
张健
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
Electric Power Research Institute of State Grid Henan Electric Power Co Ltd
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
Electric Power Research Institute of State Grid Henan Electric Power Co Ltd
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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
    • H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
    • 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
    • H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
    • H02J3/00125—Transmission line or load transient problems, e.g. overvoltage, resonance or self-excitation of inductive loads
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention provides a direct current group control method and system for multi-direct current combined modulation. According to the method and the system, the types of the direct current loops in the power transmission network and the power receiving network are divided, and according to the characteristics of the direct current loops of different types, the method and the system analyze how to perform joint optimization on the safety control measures of the direct current groups in the power transmission network and the power receiving network when a blocking fault occurs in a single direct current loop of a certain type, and share the safety control measures. According to the method and the system, the power unbalance of the power transmission end power grid and the power unbalance of the power receiving end power grid are quickly compensated through the power modulation and the power support capacity of other direct currents except fault direct currents in the power grid, the power modulation effect between the direct currents of the power grids is further exerted, and the power support capacity between the power grids is enhanced.

Description

DC group control method and system for multi-DC combined modulation
Technical Field
The invention relates to the field of simulation analysis of power systems, in particular to a direct current group control method and system for multi-direct current joint modulation.
Background
In recent years, clean energy development in China is rapid, and a plurality of large clean energy power generation bases are built in northwest wind and light resource enrichment areas. However, because of the characteristic of reverse distribution of energy resources and load centers in China, the remote ultra-high voltage direct current transmission becomes an effective means for large-scale clean energy transregional delivery and efficient utilization. With intensive development of clean energy and centralized construction of cross-regional direct current engineering, the condition that the power grid at the transmitting and receiving ends has the same regional power grid at the dropping point of the multi-circuit direct current engineering is also marked, and the direct current group becomes an important form for large-scale energy resource transmission in the future.
The alternating current landing points of the direct current group converter stations are closely electrically connected, and the interaction effect between direct current and direct current engineering is obvious when the alternating current-direct current coupling effect is obvious. The existing safety control measures of the extra-high voltage direct current engineering are only used for a single direct current engineering. The following considerations are not made: 1) The superposition of safety control measures exists between the direct current projects, and when a plurality of direct currents are simultaneously blocked, the situation of insufficient safety control measures can occur; 2) The safety control measures are single and have larger cost, the power supporting function between the same transmission and the direct current is not considered, and the comprehensive control capability of the direct current group is not exerted; 3) After the direct current groups at the transmitting and receiving ends are formed, mutual support among regional power grids can be formed. Therefore, the safety control measures of the direct current group are comprehensively utilized, and the whole control capability of the direct current group is brought into play.
Disclosure of Invention
In order to solve the technical problem that the safety control measures of the direct current transmission project in the prior art are used for single direct current project, and the technical problem of the joint control of multiple direct currents in the direct current groups is not considered, the invention provides a direct current group control method of the joint modulation of multiple direct currents, wherein the direct current groups comprise a transmitting end direct current group of a direct current transmitting end power grid and a receiving end direct current group of a direct current receiving end power grid, the direct currents which are mutually connected in the transmitting end direct current group and the receiving end direct current group are the same-transmitting and same-receiving direct currents, the direct currents which are not connected with the receiving end direct current group in the transmitting end direct current group are different-transmitting and same-receiving direct currents, and the method comprises the following steps:
Determining the type of direct current with direct current blocking faults, wherein the direct current with direct current blocking is fault direct current, and the type of the fault direct current is any one of a sending end co-sending same-receiving direct current, a receiving end co-sending same-receiving direct current, a sending end non-co-sending same-receiving direct current and a receiving end non-co-sending same-receiving direct current;
when the fault direct current is the same-transmission and same-reception direct current of the transmitting end, determining the first power lifting total amount of the transmitting end according to the maximum power lifting amount of the same-transmission and same-reception direct current except the fault direct current in the power grid of the transmitting end; determining a second power lifting total amount of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-type direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end; determining control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total amount of the first power lifting of the sending end, the total amount of the second power lifting of the sending end and the maximum power surplus which can be born by a sending end power grid;
when the fault direct current is the same-transmission and same-reception direct current of the receiving end, determining the first power lifting total amount of the receiving end according to the maximum power lifting amount of the same-transmission and same-reception direct current outside the fault direct current in the power grid of the receiving end; determining a second power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending same-type direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the sending end connected with the receiving end; determining control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the total quantity of the first power lifting of the receiving end, the total quantity of the second power lifting of the receiving end and the maximum power shortage which can be born by a receiving-end power grid;
When the fault direct current is the non-simultaneous transmission and simultaneous reception direct current of the transmitting end, determining the third power lifting total amount of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-simultaneous transmission and simultaneous reception direct current except the fault direct current in the power grid of the transmitting end and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end; determining control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total lifting amount of the third power of the sending end and the maximum power surplus which can be born by a sending end power grid;
when the fault direct current is the non-concurrent sending and same-receiving direct current of the receiving end, determining the third power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending and same-receiving direct current except the fault direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid where the sending end connected with the receiving end is located; and determining control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the third power lifting total quantity of the receiving end and the maximum power shortage which can be born by the receiving-end power grid.
Further, when the fault direct current is the same-transmission and same-reception direct current of the transmitting end, determining the first power lifting total amount of the transmitting end according to the maximum power lifting amount of the same-transmission and same-reception direct current except the fault direct current in the power grid of the transmitting end; determining a second power lifting total amount of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-type direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end; according to the blocking amount of the fault direct current, the total amount of the first power lifting of the transmitting end, the total amount of the second power lifting of the transmitting end and the surplus of the maximum power which can be born by the transmitting end power grid determine the control measures adopted by the transmitting end direct current group, wherein the control measures comprise:
Determining the total power lifting amount P of the first power of the transmitting end according to the maximum power lifting amount of the same-transmitting same-receiving direct current except the fault direct current in the transmitting end power grid up1 feeding Wherein the first power boost total amount P of the transmitting end up1 feeding The maximum power rise of the same-sending same-receiving direct current except the fault direct current in the sending end direct current group is equal to the sum of the maximum power rise of the same-sending same-receiving direct current except the fault direct current;
determining the second power lifting total amount P of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-type direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end up2 feeding Wherein the second power boost total amount P of the transmitting end up2 feeding The calculation formula of (2) is as follows:
in the formula, k power grids of receiving ends of different sending same-receiving type direct current in the power grids of the sending ends are in total, wherein the j-th receiving end power grid can bear the maximum powerSurplus is DeltaP' Surplus receiver j The number of the transmitting ends connected with the receiving end of the j-th receiving end power grid in the non-simultaneous transmitting same-receiving direct current is n, and the i-th is P updci sends j And j is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, wherein N is the total number of non-simultaneous transmission and simultaneous reception direct currents in a transmission end power grid.
Comparing the DC blocking amount P of the fault DC Locking conveyer The total power of the transmitting end is increased by the total power P up1 feeding The second power of the transmitting end is increased by the total amount P up2 feeding And maximum power surplus DeltaP which can be born by a power transmission end power grid Surplus send end Wherein, when P Locking conveyer ≤P up1 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer To supplement unbalanced power of the receiving-end power grid; when P up1 feeding <P Locking conveyer ≤P up1 feeding +P up2 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer To supplement unbalanced power of the receiving-end power grid; when (when)
P up1 feeding +P up2 feeding <P Locking conveyer ≤P up1 feeding +P up2 feeding +△P Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up1 feeding +P up2 feeding And ensure the power boost P of the DC group at the transmitting end up1 feeding +P up2 feeding After that, the power grid at the transmitting end stably operates; when P Locking conveyer >P up1 feeding +P up2 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up1 feeding +P up2 feeding And the power grid at the transmitting end adopts a cutting measure, and the cutting amount P is calculated Cutting machine feeding ＝P Locking conveyer -P Lifting and conveying device -ΔP Surplus send end 。
Further, when the fault direct current is the same-transmission and same-reception direct current of the receiving end, determining a first power lifting total amount of the receiving end according to the maximum power lifting amount of the same-transmission and same-reception direct current except the fault direct current in the power grid of the receiving end; determining a second power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending same-type direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the sending end connected with the receiving end; determining control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the total second power lifting quantity of the receiving end and the maximum power shortage which can be born by a receiving-end power grid, wherein the control measures comprise;
Determining the total power lifting amount P of the first power of the receiving end according to the maximum power lifting amount of the co-fed and co-fed direct current of the same type except the fault direct current in the power grid of the receiving end up1 receptor Wherein the receiving end first power boost total amount P up1 receptor The maximum power rise of the same-transmission and same-reception type direct current except the fault direct current in the reception end direct current group is equal to the sum of the maximum power rise of the same-transmission and same-reception type direct current except the fault direct current;
determining the second power lifting total amount P of the transmitting end according to the maximum power lifting amount of the receiving end of the non-co-transmitting same-type direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the transmitting end connected with the receiving end up2 receptor Wherein the second power boost total amount P of the receiving end up2 receptor The calculation formula of (2) is as follows:
in the formula, k power grids of the power grid where the power grid is connected with the non-identical power grid is in the power grid where the power grid is in the j-th power grid can bear the maximum power is delta P' Shortage delivery end j The number of the receiving ends connected with the power grid of the j-th transmitting end in the non-simultaneous transmitting and same receiving type direct current is n, and the i-th is P updci is subjected to j And j is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, wherein N is the total number of non-simultaneous transmission and simultaneous reception direct currents in the receiving-end power grid.
Comparing the DC blocking amount P of the fault DC Locking conveyer The total power of the receiving end is increased by the total power P up1 receptor The second power of the receiving end is increased by the total amount P up2 receptor And the maximum power shortage DeltaP that the receiving end electric network can bear Receiving terminal for deficiency Wherein, when P Locking conveyer ≤P up1 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor To supplement unbalanced power of the power grid at the transmitting end; when P up1 receptor <P Locking receptor ≤P up1 receptor +P up2 receptor During the process, the power of the receiving end DC group is increasedRise P Lifting the subject Equal to P Locking receptor To supplement unbalanced power of the power grid at the transmitting end; when P up1 receptor +P up2 receptor <P Locking receptor ≤P up1 receptor +P up2 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up1 receptor +P up2 receptor And ensure the power boost P of the DC group at the transmitting end up1 receptor +P up2 receptor After that, the receiving end power grid stably operates; when P Locking receptor >P up1 receptor +P up2 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up1 receptor +P up2 receptor And the receiving end power grid adopts load shedding measures, and the load shedding quantity P Load shedding ＝P Locking receptor -P Lifting the subject -ΔP Receiving terminal for deficiency 。
Further, when the fault direct current is the non-concurrent sending and receiving direct current of the sending end, determining the third power lifting total amount of the sending end according to the maximum power lifting amount of the sending end of the non-concurrent sending and receiving direct current except the fault direct current in the power grid of the sending end and the maximum power surplus which can be born by the power grid of the receiving end connected with the sending end; and determining the control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total lifting amount of the third power of the sending end and the maximum power surplus which can be born by the sending end power grid, wherein the control measures comprise:
Determining the third power lifting total amount P of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-identical transmitting and receiving type direct current except the fault direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end up3 feeding Wherein the third power boost total amount P of the transmitting end up3 feeding The calculation formula of (2) is as follows:
in the formula, k power grids of receiving ends of the non-same-transmission-type and same-receiving-type direct current except fault direct current in the power grid of the transmitting end are in total, wherein the maximum power surplus bearable by the j-th receiving-end power grid is delta P' Surplus and overstock receptionEnd j The number of the sending ends connected with the receiving end of the j-th receiving end power grid in the non-simultaneous sending and receiving type direct current except the fault direct current in the sending end power grid is n, and the i-th is P updci sends j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is more than or equal to 1 and less than or equal to N, and N is the total number of non-simultaneous transmission and simultaneous reception direct currents except fault direct currents in a power grid at a transmitting end.
Comparing the DC blocking amount P of the fault DC Locking conveyer The third power of the transmitting end is increased by the total amount P up3 feeding And maximum power surplus delta P which can be born by a power transmission end power grid Surplus send end Wherein, when P Locking conveyer ≤P up3 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer The method comprises the steps of carrying out a first treatment on the surface of the When P up3 feeding <P Locking conveyer ≤P up3 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up3 feeding And ensure the power boost P of the DC group at the transmitting end up3 feeding After that, the power grid at the transmitting end stably operates; when P Locking conveyer >P up3 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up3 feeding And the power grid at the transmitting end adopts a cutting measure, and the cutting amount P is calculated Cutting machine feeding ＝P Locking conveyer -P Lifting and conveying device -ΔP Surplus send end 。
Further, when the fault direct current is the non-concurrent sending same-type direct current of the receiving end, determining a third power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending same-type direct current except the fault direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid where the sending end connected with the receiving end is located; and determining the control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the third power lifting total quantity of the receiving end and the maximum power shortage which can be born by the receiving-end power grid, wherein the control measures comprise:
determining the third power lifting total amount P of the transmitting end according to the maximum power lifting amount of the receiving end of the non-concurrent transmitting same-type direct current except fault direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the transmitting end connected with the receiving end up3 receptor Wherein the total amount P of the three power boosting of the receiving end up3 receptor The calculation formula of (2) is as follows:
in the formula, k power grids of the receiving end of the non-same-transmission-type direct current except the fault direct current are in total, wherein the maximum power shortage which can be born by the j power grid of the receiving end is delta P' Shortage delivery end j The number of the receiving ends connected with the j-th power grid in the non-concurrent transmission and co-reception type direct current except the fault direct current in the receiving end power grid is n, and the i is P updci is subjected to j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is more than or equal to 1 and less than or equal to N, and N is the total number of non-concurrent sending and concurrent receiving direct currents except fault direct currents in the receiving-end power grid.
Comparing the DC blocking amount P of the fault DC Locking conveyer The third power of the receiving end is increased by the total amount P up3 receptor And the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency Wherein, when P Locking conveyer ≤P up3 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor The method comprises the steps of carrying out a first treatment on the surface of the When P up3 receptor <P Locking receptor ≤P up3 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up3 receptor And ensure the power boost P of the DC group at the transmitting end up3 receptor After that, the receiving end power grid stably operates; when P Locking receptor >P up3 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up3 receptor And the receiving end power grid adopts load shedding measures, and the load shedding quantity P Load shedding ＝P Locking receptor -P Lifting the subject -ΔP Receiving terminal for deficiency 。
According to another aspect of the present invention, there is provided a dc group control system for multi-dc joint modulation, where the dc groups controlled by the system include a transmitting dc group of a dc transmitting power grid and a receiving dc group of a dc receiving power grid, where the connected dc in the transmitting dc group and the receiving dc group are co-transmitting and co-receiving dc, the direct current in the transmitting dc group that is not connected to the receiving dc group, and the direct current in the receiving dc group that is not connected to the transmitting dc group is non-co-transmitting and co-receiving dc, the system includes:
the direct current fault unit is used for determining the type of direct current with direct current blocking faults, wherein the direct current with direct current blocking is fault direct current, and the type of the fault direct current is any one of a sending end co-sending same-receiving direct current, a receiving end co-sending same-receiving direct current, a sending end non-co-sending same-receiving direct current and a receiving end non-co-sending same-receiving direct current;
the first control unit is used for determining the first power lifting total amount of the transmitting end according to the maximum power lifting amount of the co-transmitting and co-receiving direct current except the fault direct current in the transmitting end power grid when the fault direct current is the transmitting end co-transmitting and co-receiving direct current; determining a second power lifting total amount of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-type direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end; determining control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total amount of the first power lifting of the sending end, the total amount of the second power lifting of the sending end and the maximum power surplus which can be born by a sending end power grid;
The second control unit is used for determining the first power lifting total amount of the receiving end according to the maximum power lifting amount of the co-fed and co-fed direct current except the fault direct current in the receiving end power grid when the fault direct current is the receiving end co-fed and co-fed direct current; determining a second power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending same-type direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the sending end connected with the receiving end; determining control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the total quantity of the first power lifting of the receiving end, the total quantity of the second power lifting of the receiving end and the maximum power shortage which can be born by a receiving-end power grid;
the third control unit is used for determining the third power lifting total amount of the sending end according to the maximum power lifting amount of the sending end of the non-concurrent sending and concurrent receiving type direct current except the fault direct current in the sending end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the sending end when the fault direct current is the sending end non-concurrent sending and concurrent receiving type direct current; determining control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total lifting amount of the third power of the sending end and the maximum power surplus which can be born by a sending end power grid;
The fourth control unit is used for determining the third power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending and concurrent receiving type direct current except the fault direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid where the sending end connected with the receiving end is located when the fault direct current is the receiving end non-concurrent sending and concurrent receiving type direct current; and determining control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the third power lifting total quantity of the receiving end and the maximum power shortage which can be born by the receiving-end power grid.
Further, the first control unit includes:
the power transmission end first power unit is used for determining the total power lifting amount P of the power transmission end according to the maximum power lifting amount of the same-transmission same-type direct current except the fault direct current in the power transmission end power grid up1 feeding Wherein the first power boost total amount P of the transmitting end up1 feeding The maximum power rise of the same-sending same-receiving direct current except the fault direct current in the sending end direct current group is equal to the sum of the maximum power rise of the same-sending same-receiving direct current except the fault direct current;
the power transmission end second power unit is used for determining the total power lifting amount P of the power transmission end second power according to the maximum power lifting amount of the power transmission end of the non-identical power transmission same-type direct current in the power transmission end power grid and the maximum power surplus which can be born by the power transmission end connected power grid where the power transmission end is positioned up2 feeding Wherein the second power boost total amount P of the transmitting end up2 feeding The calculation formula of (2) is as follows:
in the formula, k power grids of receiving ends connected with different sending and receiving type direct current sending ends in the power grid of the sending end are provided, wherein the maximum power surplus bearable by the j-th receiving end power grid is delta P' Surplus receiver j The number of the transmitting ends connected with the receiving end of the j-th receiving end power grid in the non-simultaneous transmitting same-receiving direct current is n, and the i-th is P updci sends j ，1≤j≤k，1≤i≤n，1N is more than or equal to N and is the total number of non-simultaneous transmission and simultaneous reception direct currents in the transmission end power grid.
A first switching control unit for comparing the DC blocking amount P of the fault DC Locking conveyer The total power of the transmitting end is increased by the total power P up1 feeding The second power of the transmitting end is increased by the total amount P up2 feeding And maximum power surplus delta P which can be born by a power transmission end power grid Surplus send end Wherein, when P Locking conveyer ≤P up1 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer To supplement unbalanced power of the receiving-end power grid; when P up1 feeding <P Locking conveyer ≤P up1 feeding +P up2 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer To supplement unbalanced power of the receiving-end power grid; when P up1 feeding +P up2 feeding <P Locking conveyer ≤P up1 feeding +P up2 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up1 feeding +P up2 feeding And ensure the power boost P of the DC group at the transmitting end up1 feeding +P up2 feeding After that, the power grid at the transmitting end stably operates; when P Locking conveyer >P up1 feeding +P up2 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up1 feeding +P up2 feeding And the power grid at the transmitting end adopts a cutting measure, and the cutting amount is measured
P Cutting machine feeding ＝P Locking conveyer -P Lifting and conveying device -ΔP Surplus send end 。
Further, the second control unit includes;
the receiving end first power unit is used for determining the total quantity P of the receiving end first power lifting according to the maximum power lifting quantity of the co-current and co-current receiving direct currents except the fault direct current in the receiving end power grid up1 receptor Wherein the receiving end first power boost total amount P up1 receptor The maximum power rise of the same-transmission and same-reception type direct current except the fault direct current in the reception end direct current group is equal to the sum of the maximum power rise of the same-transmission and same-reception type direct current except the fault direct current;
the receiving end second power unit is used for receiving type according to non-synchronous transmission in the receiving end power gridThe maximum power lifting quantity of the direct current receiving end and the maximum power shortage which can be born by the power grid of the power transmission end connected with the receiving end determine the second power lifting total quantity P of the power transmission end up2 receptor Wherein the second power boost total amount P of the receiving end up2 receptor The calculation formula of (2) is as follows:
In the formula, k power grids of the power grid where the power grid of the receiving end is connected with the non-same power grid of the receiving end is, wherein the maximum power shortage which can be born by the j power grid of the receiving end is delta P' Shortage delivery end j The number of the receiving ends connected with the power grid of the j-th transmitting end in the non-simultaneous transmitting and same receiving type direct current is n, and the i-th is P updci is subjected to j And j is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, wherein N is the total number of non-simultaneous transmission and simultaneous reception direct currents in the receiving-end power grid.
A first load control unit for comparing the DC blocking amount P of the fault DC Locking conveyer The total power of the receiving end is increased by the total power P up1 receptor The second power of the receiving end is increased by the total amount P up2 receptor And the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency Wherein, when P Locking conveyer ≤P up1 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor To supplement unbalanced power of the power grid at the transmitting end; when P up1 receptor <P Locking receptor ≤P up1 receptor +P up2 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor To supplement unbalanced power of the power grid at the transmitting end; when P up1 receptor +P up2 receptor <P Locking receptor ≤P up1 receptor +P up2 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up1 receptor +P up2 receptor And ensure the power boost P of the receiving end direct current group up1 receptor +P up2 receptor After that, the receiving end power grid stably operates; when P Locking receptor >P up1 receptor +P up2 receptor +ΔP Receiving terminal for deficiency During the process, the power of the receiving end DC group is increasedRise P Lifting the subject Equal to P up1 receptor +P up2 receptor And the receiving end power grid adopts load shedding measures, and the load shedding quantity P Load shedding ＝P Locking receptor -P Lifting the subject -ΔP Receiving terminal for deficiency 。
Further, the third control unit includes:
the third power unit of the transmitting end is used for determining the third power lifting total amount P of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-receiving direct current except fault direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end up3 feeding Wherein the third power boost total amount P of the transmitting end up3 feeding The calculation formula of (2) is as follows:
in the formula, k power grids of receiving ends of the non-same-transmission-type and same-receiving-type direct current except fault direct current in the power grid of the transmitting end are in total, wherein the maximum power surplus bearable by the j-th receiving-end power grid is delta P' Surplus receiver j The number of the sending ends connected with the receiving end of the j-th receiving end power grid in the non-simultaneous sending and receiving type direct current except the fault direct current in the sending end power grid is n, and the i-th is P updci sends j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is more than or equal to 1 and less than or equal to N, and N is the total number of non-simultaneous transmission and simultaneous reception direct currents except fault direct currents in a power grid at a transmitting end.
A second switching control unit for comparing the DC blocking amount P of the fault DC Locking conveyer The third power of the transmitting end is increased by the total amount P up3 feeding And maximum power surplus delta P which can be born by a power transmission end power grid Surplus send end Wherein, when P Locking conveyer ≤P up3 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer The method comprises the steps of carrying out a first treatment on the surface of the When P up3 feeding <P Locking conveyer ≤P up3 feeding +△P Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up3 feeding And ensure the power boost P of the DC group at the transmitting end up3 feeding After that, the processing unit is configured to,the power grid at the transmitting end stably operates; when P Locking conveyer >P up3 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up3 feeding And the power grid at the transmitting end adopts a cutting measure, and the cutting amount P is calculated Cutting machine feeding ＝P Locking conveyer -P Lifting and conveying device -ΔP Surplus send end 。
Further, the fourth control unit includes:
the receiving end third power unit is used for determining the total power lifting amount P of the sending end third power according to the maximum power lifting amount of the receiving end of the non-synchronous sending same-receiving direct current except the fault direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the sending end connected with the receiving end up3 receptor Wherein the total amount P of the three power boosting of the receiving end up3 receptor The calculation formula of (2) is as follows:
in the formula, k power grids of the receiving end of the non-same-transmission-type direct current except the fault direct current are in total, wherein the maximum power shortage which can be born by the j power grid of the receiving end is delta P' Shortage delivery end j The number of the receiving ends connected with the j-th power grid in the non-concurrent transmission and co-reception type direct current except the fault direct current in the receiving end power grid is n, and the i is P updci is subjected to j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is more than or equal to 1 and less than or equal to N, and N is the total number of non-concurrent sending and concurrent receiving direct currents except fault direct currents in the receiving-end power grid.
A second load control unit for comparing the DC blocking amount P of the fault DC Locking conveyer The third power of the receiving end is increased by the total amount P up3 receptor And the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency Wherein, when P Locking conveyer ≤P up3 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor The method comprises the steps of carrying out a first treatment on the surface of the When P up3 receptor <P Locking receptor ≤P up3 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up3 receptor And ensure the power boost P of the DC group at the transmitting end up3 receptor After that, the receiving end power grid stably operates; when P Locking receptor >P up3 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up3 receptor And the receiving end power grid adopts load shedding measures, and the load shedding quantity P Load shedding ＝P Locking receptor -P Lifting the subject -ΔP Receiving terminal for deficiency 。
According to the method and the system for controlling the direct current group with the multi-direct current combined modulation, the types of the direct current loops in the power transmission end power grid and the power receiving end power grid are divided, when a blocking fault occurs in a single direct current loop of a certain type according to the characteristics of the direct current loops of different types, the safety control measures of the direct current groups in the power grid are jointly optimized, and the safety control measures are shared.
Drawings
Exemplary embodiments of the present invention may be more completely understood in consideration of the following drawings:
fig. 1 is a flow chart of a method of dc group control for multi-dc joint modulation in accordance with a preferred embodiment of the present invention;
FIG. 2 is a schematic DC swarm diagram of a transmitting end power grid and a receiving end power grid according to a preferred embodiment of the present invention;
fig. 3 is a schematic structural diagram of a multi-dc-combined-modulation dc group control system according to a preferred embodiment of the present invention.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Fig. 1 is a flow chart of a method of dc group control for multi-dc joint modulation according to a preferred embodiment of the present invention. As shown in fig. 1, a multi-dc joint modulation dc group control method 100 according to the present preferred embodiment starts in step 101.
The direct current group in the control method comprises a transmitting end direct current group of a direct current transmitting end power grid and a receiving end direct current group of a direct current receiving end power grid, wherein the direct currents connected with each other in the transmitting end direct current group and the receiving end direct current group are the same-transmitting and same-receiving direct currents, the direct currents which are not connected with the receiving end direct current group in the transmitting end direct current group are the same-transmitting and same-receiving direct currents, and the direct currents which are not connected with the transmitting end direct current group in the receiving end direct current group are the different-transmitting and same-receiving direct currents.
Fig. 2 is a schematic diagram of dc clusters of a transmitting end power grid and a receiving end power grid according to a preferred embodiment of the present invention. As shown in fig. 2, two co-fed and co-received direct currents of a shaoyi direct current and a Yindong direct current are formed between a Ningxia power grid and a Shandong power grid, one non-co-fed and co-received direct current is arranged in the Ningxia power grid at the feeding end, and one non-co-fed and co-received direct current is arranged in the Shandong power grid at the receiving end.
In step 101, a type of dc with dc blocking fault is determined, where the dc with dc blocking is a faulty dc, and the type of the faulty dc is any one of a transmitting-end co-transmitting same-recipient dc, a receiving-end co-transmitting same-recipient dc, a transmitting-end non-co-transmitting same-recipient dc, and a receiving-end non-co-transmitting same-recipient dc.
In step 102, when the fault direct current is the same-type direct current sent by the sending end, determining a first power lifting total amount of the sending end according to the maximum power lifting amount of the same-type direct current except the fault direct current in the power grid of the sending end; determining a second power lifting total amount of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-type direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end; and determining control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total amount of the first power lifting of the sending end, the total amount of the second power lifting of the sending end and the maximum power surplus which can be born by the sending end power grid.
In step 103, when the fault direct current is the same-transmission and same-reception direct current of the receiving end, determining a first power lifting total amount of the receiving end according to a maximum power lifting amount of the same-transmission and same-reception direct current except the fault direct current in the power grid of the receiving end; determining a second power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending same-type direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the sending end connected with the receiving end; determining control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the total quantity of the first power lifting of the receiving end, the total quantity of the second power lifting of the receiving end and the maximum power shortage which can be born by a receiving-end power grid;
In step 104, when the faulty direct current is a non-concurrent sending and receiving direct current of the sending end, determining a third power lifting total amount of the sending end according to a maximum power lifting amount of the sending end of the non-concurrent sending and receiving direct current except the faulty direct current in the sending end power grid and a maximum power surplus which can be born by the power grid where the receiving end connected with the sending end is located; determining control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total lifting amount of the third power of the sending end and the maximum power surplus which can be born by a sending end power grid;
in step 105, when the fault dc is a receiving-end non-concurrent sending same-type dc, determining a third power lifting total amount of the receiving end according to a maximum power lifting amount of the receiving end of the non-concurrent sending same-type dc except the fault dc in the receiving-end power grid and a maximum power shortage which can be borne by the power grid where the receiving end is connected; and determining control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the third power lifting total quantity of the receiving end and the maximum power shortage which can be born by the receiving-end power grid.
Preferably, when the fault direct current is the same-transmission and same-reception direct current of the transmitting end, determining the first power lifting total amount of the transmitting end according to the maximum power lifting amount of the same-transmission and same-reception direct current except the fault direct current in the power grid of the transmitting end; determining a second power lifting total amount of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-type direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end; according to the blocking amount of the fault direct current, the total amount of the first power lifting of the transmitting end, the total amount of the second power lifting of the transmitting end and the surplus of the maximum power which can be born by the transmitting end power grid determine the control measures adopted by the transmitting end direct current group, wherein the control measures comprise:
Determining the total power lifting amount P of the first power of the transmitting end according to the maximum power lifting amount of the same-transmitting same-receiving direct current except the fault direct current in the transmitting end power grid up1 feeding Wherein the first power boost total amount P of the transmitting end up1 feeding The maximum power rise of the same-sending same-receiving direct current except the fault direct current in the sending end direct current group is equal to the sum of the maximum power rise of the same-sending same-receiving direct current except the fault direct current;
determining the second power lifting total amount P of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-type direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end up2 feeding Wherein the second power boost total amount P of the transmitting end up2 feeding The calculation formula of (2) is as follows:
in the formula, k power grids of receiving ends connected with different sending and receiving type direct current sending ends in the power grid of the sending end are provided, wherein the maximum power surplus bearable by the j-th receiving end power grid is delta P' Surplus receiver j The number of the transmitting ends connected with the receiving end of the j-th receiving end power grid in the non-simultaneous transmitting same-receiving direct current is n, and the i-th is P updci sends j And j is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, wherein N is the total number of non-simultaneous transmission and simultaneous reception direct currents in a transmission end power grid.
Comparing the DC blocking amount P of the fault DC Locking conveyer The total power of the transmitting end is increased by the total power P up1 feeding The second power of the transmitting end is increased by the total amount P up2 feeding And maximum power surplus DeltaP which can be born by a power transmission end power grid Surplus send end Wherein, when P Locking conveyer ≤P up1 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer To supplement unbalanced power of the receiving-end power grid; when P up1 feeding <P Locking conveyer ≤P up1 feeding +P up2 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer To supplement unbalanced power of the receiving-end power grid; when P up1 feeding +P up2 feeding <P Locking conveyer ≤P up1 feeding +P up2 feeding +△P Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up1 feeding +P up2 feeding And ensure the power boost P of the DC group at the transmitting end up1 feeding +P up2 feeding After that, the power grid at the transmitting end stably operates; when P Locking conveyer >P up1 feeding +P up2 feeding +△P Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up1 feeding +P up2 feeding And the power grid at the transmitting end adopts a cutting measure, and the cutting amount P is calculated Cutting machine feeding ＝P Locking conveyer -P Lifting and conveying device -ΔP Surplus send end 。
In the preferred embodiment, after the blocking failure occurs in the co-transmission and co-reception type direct current of the power grid at the transmitting end, the total amount of the first power boost at the transmitting end and the total amount of the second power boost at the transmitting end are calculated, and then the direct current blocking amount P of the failed direct current is calculated Locking conveyer The total power of the transmitting end is increased by the total power P up1 feeding The second power of the transmitting end is increased by the total amount P up2 feeding And a transmitting DC group DeltaP Surplus send end The power lifting total amount of the power grid at the transmitting end is judged step by step under the condition of ensuring stable operation. However, a second preferred method is also possible, i.e. the dc blocking value P of the faulty dc is compared after the total amount of the first power boost of the transmitting end is calculated Locking conveyer And the total power boost amount P of the transmitting end up1 feeding Determining whether non-co-feed-in-type direct current in the power grid at the feed end is required to be fed inLine power boost to compensate for power on the power grid at the power supply end when P is determined Locking conveyer >P up1 feeding When power compensation is needed, calculating the total power lifting amount of non-same-transmission-type direct current of the power grid of the transmitting end, and according to the total power lifting amount of the first power lifting amount of the transmitting end, the total power lifting amount of the second power lifting amount of the transmitting end and the direct current group DeltaP of the transmitting end Surplus send end The size of the power grid is determined whether the power of the power grid at the transmitting end is directly increased or a cutting machine is needed. Similarly, when the co-current and co-current receiving type direct current of the receiving end power grid has a blocking fault, a second preferred mode can be adopted to compare the direct current blocking quantity P of the fault direct current Locking receptor And the total power boost amount P of the receiving end up1 receptor And determining whether non-concurrent transmission and reception type direct current in the receiving end power grid is required to be subjected to power boosting so as to compensate the power of the receiving end power grid, and then carrying out subsequent calculation and comparison.
Preferably, when the fault direct current is the receiving end co-feeding same-receiving type direct current, determining a first power lifting total amount of the receiving end according to a maximum power lifting amount of the co-feeding same-receiving type direct current except the fault direct current in the receiving end power grid; determining a second power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending same-type direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the sending end connected with the receiving end; determining control measures adopted by the receiving-end direct current group according to the blocking amount of the fault direct current, the total amount of the first power lifting of the receiving end, the total amount of the second power lifting of the receiving end and the maximum power shortage which can be born by a receiving-end power grid;
determining the total power lifting amount P of the first power of the receiving end according to the maximum power lifting amount of the co-fed and co-fed direct current of the same type except the fault direct current in the power grid of the receiving end up1 receptor Wherein the receiving end first power boost total amount P up1 receptor The maximum power rise of the same-transmission and same-reception type direct current except the fault direct current in the reception end direct current group is equal to the sum of the maximum power rise of the same-transmission and same-reception type direct current except the fault direct current;
Determining the second power lifting total amount P of the transmitting end according to the maximum power lifting amount of the receiving end of the non-co-transmitting same-type direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the transmitting end connected with the receiving end up2 receptor Wherein the second power boost total amount of the receiving endP up2 receptor The calculation formula of (2) is as follows:
in the formula, k power grids of the power grid where the power grid is connected with the non-identical power grid is in the power grid where the power grid is in the j-th power grid can bear the maximum power is delta P' Shortage delivery end j The number of the receiving ends connected with the power grid of the j-th transmitting end in the non-simultaneous transmitting and same receiving type direct current is n, and the i-th is P updci is subjected to j And j is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, wherein N is the total number of non-simultaneous transmission and simultaneous reception direct currents in the receiving-end power grid.
Comparing the DC blocking amount P of the fault DC Locking conveyer The total power of the receiving end is increased by the total power P up1 receptor The second power of the receiving end is increased by the total amount P up2 receptor And the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency Wherein, when P Locking conveyer ≤P up1 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor To supplement unbalanced power of the power grid at the transmitting end; when P up1 receptor <P Locking receptor ≤P up1 receptor +P up2 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor To supplement unbalanced power of the power grid at the transmitting end; when P up1 receptor +P up2 receptor <P Locking receptor ≤P up1 receptor +P up2 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up1 receptor +P up2 receptor And ensure the power boost P of the DC group at the transmitting end up1 receptor +P up2 receptor After that, the receiving end power grid stably operates; when P Locking receptor >P up1 receptor +P up2 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up1 receptor +P up2 receptor And the receiving end power grid adopts load shedding measures, and the load shedding quantity P Load shedding ＝P Locking receptor -P Lifting the subject -ΔP Receiving terminal for deficiency 。
Preferably, when the fault direct current is a non-concurrent sending and receiving direct current of the sending end, determining a third power lifting total amount of the sending end according to a maximum power lifting amount of the sending end of the non-concurrent sending and receiving direct current except the fault direct current in a power grid of the sending end and a maximum power surplus which can be born by the power grid of the receiving end connected with the sending end; and determining the control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total lifting amount of the third power of the sending end and the maximum power surplus which can be born by the sending end power grid, wherein the control measures comprise:
determining the third power lifting total amount P of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-identical transmitting and receiving type direct current except the fault direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end up3 feeding Wherein the third power boost total amount P of the transmitting end up3 feeding The calculation formula of (2) is as follows:
in the formula, k power grids of receiving ends of the non-same-transmission-type and same-receiving-type direct current except fault direct current in the power grid of the transmitting end are in total, wherein the maximum power surplus bearable by the j-th receiving-end power grid is delta P' Surplus receiver j The number of the sending ends connected with the receiving end of the j-th receiving end power grid in the non-simultaneous sending and receiving type direct current except the fault direct current in the sending end power grid is n, and the i-th is P updci sends j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is more than or equal to 1 and less than or equal to N, and N is the total number of non-simultaneous transmission and simultaneous reception direct currents except fault direct currents in a power grid at a transmitting end.
Comparing the DC blocking amount P of the fault DC Locking conveyer The third power of the transmitting end is increased by the total amount P up3 feeding And maximum power surplus delta P which can be born by a power transmission end power grid Surplus send end Wherein, when P Locking conveyer ≤P up3 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer The method comprises the steps of carrying out a first treatment on the surface of the When P up3 feeding <P Locking conveyer ≤P up3 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up3 feeding And ensure the power boost P of the DC group at the transmitting end up3 feeding After that, the power grid at the transmitting end stably operates; when P Locking conveyer >P up3 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up3 feeding And the power grid at the transmitting end adopts a cutting measure, and the cutting amount P is calculated Cutting machine feeding ＝P Locking conveyer -P Lifting and conveying device -ΔP Surplus send end 。
Preferably, when the fault dc is a receiving-end non-co-sending same-type dc, determining a third power lifting total amount of the receiving end according to a maximum power lifting amount of the receiving end of the non-co-sending same-type dc except the fault dc in the receiving-end power grid and a maximum power shortage which can be borne by the power grid where the receiving end is connected with the receiving end; and determining the control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the third power lifting total quantity of the receiving end and the maximum power shortage which can be born by the receiving-end power grid, wherein the control measures comprise:
determining the third power lifting total amount P of the transmitting end according to the maximum power lifting amount of the receiving end of the non-concurrent transmitting same-type direct current except fault direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the transmitting end connected with the receiving end up3 receptor Wherein the total amount P of the three power boosting of the receiving end up3 receptor The calculation formula of (2) is as follows:
in the formula, k power grids of the receiving end of the non-same-transmission-type direct current except the fault direct current are in total, wherein the maximum power shortage which can be born by the j power grid of the receiving end is delta P' Shortage delivery end j The number of the receiving ends connected with the j-th power grid in the non-concurrent transmission and co-reception type direct current except the fault direct current in the receiving end power grid is n, and the i is P updci is subjected to j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is more than or equal to 1 and less than or equal to N, and N is the total number of non-concurrent sending and concurrent receiving direct currents except fault direct currents in the receiving-end power grid.
Comparing the DC blocking amount P of the fault DC Locking conveyer Is received byEnd third power boost total P up3 receptor And the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency Wherein, when P Locking conveyer ≤P up3 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor The method comprises the steps of carrying out a first treatment on the surface of the When P up3 receptor <P Locking receptor ≤P up3 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up3 receptor And ensure the power boost P of the DC group at the transmitting end up3 receptor After that, the receiving end power grid stably operates; when P Locking receptor >P up3 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up3 receptor And the receiving end power grid adopts load shedding measures, and the load shedding quantity P Load shedding ＝P Locking receptor -P Lifting the subject -ΔP Receiving terminal for deficiency 。
Fig. 3 is a schematic structural diagram of a multi-dc-combined-modulation dc group control system according to a preferred embodiment of the present invention. As shown in fig. 3, the dc groups controlled by the dc group control system 300 with multi-dc joint modulation according to the preferred embodiment include a transmitting dc group of a dc power grid and a receiving dc group of a dc power grid, wherein the connected dc in the transmitting dc group and the receiving dc group are co-transmitting and co-receiving dc, the non-connected dc in the transmitting dc group is non-co-transmitting and co-receiving dc, and the non-connected dc in the receiving dc group is non-co-transmitting and co-receiving dc, and the system 300 includes:
A fault dc unit 301, configured to determine a type of dc with a dc blocking fault, where the dc with a dc blocking fault is a fault dc, and the type of the fault dc is any one of a transmitting-end co-transmitting and receiving-type dc, a receiving-end co-transmitting and receiving-type dc, a transmitting-end non-co-transmitting and receiving-type dc, and a receiving-end non-co-transmitting and receiving-type dc;
the first control unit 302 is configured to determine, when the fault dc is a sending-end co-sending and co-receiving dc, a first total power boost amount of the sending end according to a maximum power boost amount of the co-sending and co-receiving dc except the fault dc in the sending-end power grid; determining a second power lifting total amount of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-type direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end; determining control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total amount of the first power lifting of the sending end, the total amount of the second power lifting of the sending end and the maximum power surplus which can be born by a sending end power grid;
the second control unit 303 is configured to determine, when the fault dc is a receiving-end co-fed direct current, a receiving-end first power boost total according to a maximum power boost amount of the co-fed direct current other than the fault dc in the receiving-end power grid; determining a second power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending same-type direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the sending end connected with the receiving end; determining control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the total quantity of the first power lifting of the receiving end, the total quantity of the second power lifting of the receiving end and the maximum power shortage which can be born by a receiving-end power grid;
The third control unit 304 is configured to determine, when the fault dc is a sending end non-co-sending and co-receiving dc, a third power lifting total amount of the sending end according to a maximum power lifting amount of the sending end of the non-co-sending and co-receiving dc except the fault dc in the sending end power grid and a maximum power surplus that can be borne by the power grid where the receiving end to which the sending end is connected is located; determining control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total lifting amount of the third power of the sending end and the maximum power surplus which can be born by a sending end power grid;
the fourth control unit 305 is configured to determine, when the fault dc is a receiving-end non-co-sending and co-receiving type dc, a receiving-end third power lifting total according to a maximum power lifting amount of a receiving end of the receiving-end power grid, except the fault dc, and a maximum power shortage that the power grid where the receiving end connected with the receiving end is located can bear; and determining control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the third power lifting total quantity of the receiving end and the maximum power shortage which can be born by the receiving-end power grid.
Preferably, the first control unit 302 includes:
a power transmitting first power unit 321 for determining a total power transmitting first power boost amount P according to a maximum power boost amount of the same-power-transmitting same-type direct current except for the fault direct current in the power transmitting grid up1 feeding Wherein the first power boost total amount P of the transmitting end up1 feeding The maximum power rise of the same-sending same-receiving direct current except the fault direct current in the sending end direct current group is equal to the sum of the maximum power rise of the same-sending same-receiving direct current except the fault direct current;
the power transmission end second power unit 322 is configured to determine a power transmission end second power lifting total amount P according to a maximum power lifting amount of power transmission ends of non-identical power transmission and same-type direct current power transmission ends in a power transmission end power grid and a maximum power surplus that can be borne by a power transmission end-connected power transmission end power grid up2 feeding Wherein the second power boost total amount P of the transmitting end up2 feeding The calculation formula of (2) is as follows:
in the formula, k power grids of receiving ends connected with different sending and receiving type direct current sending ends in the power grid of the sending end are provided, wherein the maximum power surplus bearable by the j-th receiving end power grid is delta P' Surplus receiver j The number of the transmitting ends connected with the receiving end of the j-th receiving end power grid in the non-simultaneous transmitting same-receiving direct current is n, and the i-th is P updci sends j And j is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, wherein N is the total number of non-simultaneous transmission and simultaneous reception direct currents in a transmission end power grid.
A first switching control unit 323 for comparing the DC blocking amount P of the fault DC Locking conveyer The total power of the transmitting end is increased by the total power P up1 feeding The second power of the transmitting end is increased by the total amount P up2 feeding And maximum power surplus delta P which can be born by a power transmission end power grid Surplus send end Wherein, when P Locking conveyer ≤P up1 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer To supplement unbalanced power of the receiving-end power grid; when P up1 feeding <P Locking conveyer ≤P up1 feeding +P up2 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer To supplement unbalanced power of the receiving-end power grid; when P up1 feeding +P up2 feeding <P Locking conveyer ≤P up1 feeding +P up2 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up1 feeding +P up2 feeding And ensure the power boost P of the DC group at the transmitting end up1 feeding +P up2 feeding After that, the power grid at the transmitting end stably operates; when P Locking conveyer >P up1 feeding +P up2 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up1 feeding +P up2 feeding And the power grid at the transmitting end adopts a cutting measure, and the cutting amount P is calculated Cutting machine feeding ＝P Locking conveyer -P Lifting and conveying device -ΔP Surplus send end 。
Preferably, the second control unit 303 includes;
the receiving-end first power unit 331 is configured to determine a total amount of receiving-end first power boost P according to a maximum power boost amount of co-current and co-current receiving-end direct currents except for the fault direct current in the receiving-end power grid up1 receptor Wherein the receiving end first power boost total amount P up1 receptor The maximum power rise of the same-transmission and same-reception type direct current except the fault direct current in the reception end direct current group is equal to the sum of the maximum power rise of the same-transmission and same-reception type direct current except the fault direct current;
the receiving-end second power unit 332 is configured to determine a total amount of power boost P of the receiving-end second power according to a maximum power boost amount of the receiving end of the non-identical transmitting-same-receiving-type direct current in the receiving-end power grid and a maximum power shortage that the transmitting end connected with the receiving end can bear in the power grid up2 receptor Wherein the second power boost total amount P of the receiving end up2 receptor The calculation formula of (2) is as follows:
in the formula, k power grids of the power grid where the power grid of the receiving end is connected with the non-same power grid of the receiving end is, wherein the maximum power shortage which can be born by the j power grid of the receiving end is delta P' Shortage delivery end j The non-co-feeding and co-receiving type direct current medium and the firstThe number of the receiving ends connected with the j power transmission end power grids is n, and the ith is P updci is subjected to j And j is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, wherein N is the total number of non-simultaneous transmission and simultaneous reception direct currents in the receiving-end power grid.
A first load control unit 333 for comparing the dc blocking amount P of the fault dc Locking conveyer The total power of the receiving end is increased by the total power P up1 receptor The second power of the receiving end is increased by the total amount P up2 receptor And the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency Wherein, when P Locking conveyer ≤P up1 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor To supplement unbalanced power of the power grid at the transmitting end; when (when)
P up1 receptor <P Locking receptor ≤P up1 receptor +P up2 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor To supplement unbalanced power of the power grid at the transmitting end; when P up1 receptor +P up2 receptor <P Locking receptor ≤P up1 receptor +P up2 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up1 receptor +P up2 receptor And ensure the power boost P of the DC group at the transmitting end up1 receptor +P up2 receptor After that, the receiving end power grid stably operates; when P Locking receptor >P up1 receptor +P up2 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up1 receptor +P up2 receptor And the receiving end power grid adopts load shedding measures, and the load shedding quantity P Load shedding ＝P Locking receptor -P Lifting the subject -ΔP Receiving terminal for deficiency 。
Preferably, the third control unit 304 includes:
the transmitting end third power unit 341 is configured to determine a transmitting end third power lifting total amount P according to a maximum power lifting amount of a transmitting end of a non-concurrent transmitting same-receiving type direct current except a fault direct current in a transmitting end power grid and a maximum power surplus that can be borne by a power grid where the receiving end connected with the transmitting end is located up3 feeding Wherein the third power boost total amount P of the transmitting end up3 feeding Is of the meter(s)The calculation formula is as follows:
in the formula, k power grids of receiving ends of the non-same-transmission-type and same-receiving-type direct current except fault direct current in the power grid of the transmitting end are in total, wherein the maximum power surplus bearable by the j-th receiving-end power grid is delta P' Surplus receiver j The number of the sending ends connected with the receiving end of the j-th receiving end power grid in the non-simultaneous sending and receiving type direct current except the fault direct current in the sending end power grid is n, and the i-th is P updci sends j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is more than or equal to 1 and less than or equal to N, and N is the total number of non-simultaneous transmission and simultaneous reception direct currents except fault direct currents in a power grid at a transmitting end.
A second chopper control unit 342 for comparing the dc blocking amount P of the fault dc Locking conveyer The third power of the transmitting end is increased by the total amount P up3 feeding And maximum power surplus delta P which can be born by a power transmission end power grid Surplus send end Wherein, when P Locking conveyer ≤P up3 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer The method comprises the steps of carrying out a first treatment on the surface of the When P up3 feeding <P Locking conveyer ≤P up3 feeding +△P Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up3 feeding And ensure the power boost P of the DC group at the transmitting end up3 feeding After that, the power grid at the transmitting end stably operates; when P Locking conveyer >P up3 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up3 feeding And the power grid at the transmitting end adopts a cutting measure, and the cutting amount P is calculated Cutting machine feeding ＝P Locking conveyer -P Lifting and conveying device -ΔP Surplus send end 。
Preferably, the fourth control unit 305 includes:
the receiving-end third power unit 351 is configured to, according to a maximum power boost amount of a receiving end of a non-synchronous sending same-type receiving direct current except a fault direct current in a receiving-end power grid and a maximum power deficiency of a maximum power surplus that can be borne by the power grid where the sending end connected with the receiving end is locatedDetermining the total amount P of third power boost of the transmitting end up3 receptor Wherein the total amount P of the three power boosting of the receiving end up3 receptor The calculation formula of (2) is as follows:
in the formula, k power grids of the receiving end of the non-same-transmission-type direct current except the fault direct current are in total, wherein the maximum power shortage which can be born by the j power grid of the receiving end is delta P' Shortage delivery end j The number of the receiving ends connected with the j-th power grid in the non-concurrent transmission and co-reception type direct current except the fault direct current in the receiving end power grid is n, and the i is P updci is subjected to j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is more than or equal to 1 and less than or equal to N, and N is the total number of non-concurrent sending and concurrent receiving direct currents except fault direct currents in the receiving-end power grid.
A second load control unit 352 for comparing the DC blocking amount P of the fault DC Locking conveyer The third power of the receiving end is increased by the total amount P up3 receptor And the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency Wherein, when P Locking conveyer ≤P up3 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor The method comprises the steps of carrying out a first treatment on the surface of the When P up3 receptor <P Locking receptor ≤P up3 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up3 receptor And ensure the power boost P of the DC group at the transmitting end up3 receptor After that, the receiving end power grid stably operates; when P Locking receptor >P up3 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up3 receptor And the receiving end power grid adopts load shedding measures, and the load shedding quantity P Load shedding ＝P Locking receptor -P Lifting the subject -ΔP Receiving terminal for deficiency 。
The method for carrying out the joint modulation on the DC groups in the power grid by the DC group control system with the multi-DC joint modulation is the same as the steps adopted by the DC group control method with the multi-DC joint modulation, and the technical effects achieved are the same, and the method is not repeated here.
The invention has been described with reference to a few embodiments. However, as is well known to those skilled in the art, other embodiments than the above disclosed invention are equally possible within the scope of the invention, as defined by the appended patent claims.
Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a/an/the [ means, component, etc. ]" are to be interpreted openly as referring to at least one instance of said means, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.

Claims (10)

1. A direct current group control method of multi-direct current joint modulation, the direct current group includes a sending end direct current group of a direct current sending end power grid and a receiving end direct current group of a direct current receiving end power grid, wherein, the direct current connected with each other in the sending end direct current group and the receiving end direct current group is a direct current with the same sending and the same receiving type, the direct current not connected with the receiving end direct current group in the sending end direct current group is a direct current with the same sending and the same receiving type, and the method is characterized in that:
determining the type of direct current with direct current blocking faults, wherein the direct current with direct current blocking is fault direct current, and the type of the fault direct current is any one of a sending end co-sending same-receiving direct current, a receiving end co-sending same-receiving direct current, a sending end non-co-sending same-receiving direct current and a receiving end non-co-sending same-receiving direct current;
when the fault direct current is the same-transmission and same-reception direct current of the transmitting end, determining the first power lifting total amount of the transmitting end according to the maximum power lifting amount of the same-transmission and same-reception direct current except the fault direct current in the power grid of the transmitting end; determining a second power lifting total amount of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-type direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end; determining control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total amount of the first power lifting of the sending end, the total amount of the second power lifting of the sending end and the maximum power surplus which can be born by a sending end power grid;
When the fault direct current is the same-transmission and same-reception direct current of the receiving end, determining the first power lifting total amount of the receiving end according to the maximum power lifting amount of the same-transmission and same-reception direct current outside the fault direct current in the power grid of the receiving end; determining a second power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending same-type direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the sending end connected with the receiving end; determining control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the total quantity of the first power lifting of the receiving end, the total quantity of the second power lifting of the receiving end and the maximum power shortage which can be born by a receiving-end power grid;
when the fault direct current is the non-simultaneous transmission and simultaneous reception type direct current of the transmitting end, determining the third power lifting total amount of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-simultaneous transmission and simultaneous reception type direct current except the fault direct current in the power grid of the transmitting end and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end; determining control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total lifting amount of the third power of the sending end and the maximum power surplus which can be born by a sending end power grid;
when the fault direct current is the non-concurrent sending and same-receiving direct current of the receiving end, determining the third power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending and same-receiving direct current except the fault direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid where the sending end connected with the receiving end is located; and determining control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the third power lifting total quantity of the receiving end and the maximum power shortage which can be born by the receiving-end power grid.
2. The method of claim 1, wherein when the faulty dc is a sender co-fed dc, determining a first total power boost amount for the sender according to a maximum power boost amount for co-fed dc in the sender grid other than the faulty dc; determining a second power lifting total amount of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-type direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end; according to the blocking amount of the fault direct current, the total amount of the first power lifting of the transmitting end, the total amount of the second power lifting of the transmitting end and the surplus of the maximum power which can be born by the transmitting end power grid determine the control measures adopted by the transmitting end direct current group, wherein the control measures comprise:
determining the total power lifting amount P of the first power of the transmitting end according to the maximum power lifting amount of the same-transmitting same-receiving direct current except the fault direct current in the transmitting end power grid up1 feeding Wherein the first power boost total amount P of the transmitting end up1 feeding The maximum power rise of the same-sending same-receiving direct current except the fault direct current in the sending end direct current group is equal to the sum of the maximum power rise of the same-sending same-receiving direct current except the fault direct current;
determining the second power lifting total amount P of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-type direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end up2 feeding Wherein the second power boost total amount P of the transmitting end up2 feeding The calculation formula of (2) is as follows:
in the formula, k power grids of receiving ends connected with different sending and receiving type direct current sending ends in the power grid of the sending end are provided, wherein the maximum power surplus bearable by the j-th receiving end power grid is delta P' Surplus receiver j The number of the transmitting ends connected with the receiving end of the j-th receiving end power grid in the non-simultaneous transmitting and receiving type direct current is n in total,ith is P updci sends j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is more than or equal to 1 and less than or equal to N, and N is the total number of non-simultaneous transmission and direct current in a transmission end power grid;
comparing the DC blocking amount P of the fault DC Locking conveyer The total power of the transmitting end is increased by the total power P up1 feeding The second power of the transmitting end is increased by the total amount P up2 feeding And maximum power surplus delta P which can be born by a power transmission end power grid Surplus send end Wherein, when P Locking conveyer ≤P up1 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer To supplement unbalanced power of the receiving-end power grid; when P up1 feeding ＜P Locking conveyer ≤P up1 feeding +P up2 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer To supplement unbalanced power of the receiving-end power grid; when P up1 feeding +P up2 feeding ＜P Locking conveyer ≤P up1 feeding +P up2 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up1 feeding +P up2 feeding And ensure the power boost P of the DC group at the transmitting end up1 feeding +P up2 feeding After that, the power grid at the transmitting end stably operates; when P Locking conveyer ＞P up1 feeding +P up2 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up1 feeding +P up2 feeding And the power grid at the transmitting end adopts a cutting measure, and the cutting amount P is calculated Cutting machine feeding ＝P Locking conveyer -P Lifting and conveying device -ΔP Surplus send end 。
3. The method of claim 1, wherein when the failed dc is a receiver-side co-fed and co-fed dc, determining a receiver-side first power boost total according to a maximum power boost amount of the co-fed and co-fed dc outside the failed dc in the receiver-side grid; determining a second power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending same-type direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the sending end connected with the receiving end; determining control measures adopted by the receiving-end direct current group according to the blocking amount of the fault direct current, the total amount of the first power lifting of the receiving end, the total amount of the second power lifting of the receiving end and the maximum power shortage which can be born by a receiving-end power grid;
determining the total power lifting amount P of the first power of the receiving end according to the maximum power lifting amount of the co-fed and co-fed direct current of the same type except the fault direct current in the power grid of the receiving end up1 receptor Wherein the receiving end first power boost total amount P up1 receptor The maximum power rise of the same-transmission and same-reception type direct current except the fault direct current in the reception end direct current group is equal to the sum of the maximum power rise of the same-transmission and same-reception type direct current except the fault direct current;
determining the second power lifting total amount P of the transmitting end according to the maximum power lifting amount of the receiving end of the non-co-transmitting same-type direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the transmitting end connected with the receiving end up2 receptor Wherein the second power boost total amount P of the receiving end up2 receptor The calculation formula of (2) is as follows:
in the formula, k power grids of the power grid where the power grid of the receiving end is connected with the non-same power grid of the receiving end is, wherein the maximum power shortage which can be born by the j power grid of the receiving end is delta P' Shortage delivery end j The number of the receiving ends connected with the power grid of the j-th transmitting end in the non-simultaneous transmitting and same receiving type direct current is n, and the i-th is P updci is subjected to j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is the total number of non-simultaneous transmission and simultaneous reception direct currents in a receiving-end power grid;
comparing the DC blocking amount P of the fault DC Locking conveyer The total power of the receiving end is increased by the total power P up1 receptor The second power of the receiving end is increased by the total amount P up2 receptor And the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency Wherein, when P Locking conveyer ≤P up1 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor To supplement unbalanced power of the power grid at the transmitting end; when P up1 receptor ＜P Locking receptor ≤P up1 receptor +P up2 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor To supplement unbalanced power of the power grid at the transmitting end; when P up1 receptor +P up2 receptor ＜P Locking receptor ≤P up1 receptor +P up2 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up1 receptor +P up2 receptor And ensure the power boost P of the DC group at the transmitting end up1 receptor +P up2 receptor After that, the receiving end power grid stably operates; when P Locking receptor ＞P up1 receptor +P up2 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up1 receptor +P up2 receptor And the receiving end power grid adopts load shedding measures, and the load shedding quantity P Load shedding ＝P Locking receptor -P Lifting the subject -ΔP Receiving terminal for deficiency 。
4. The method of claim 1, wherein when the faulty dc is a non-co-fed and co-fed dc, determining a third power boost total of the feeding end according to a maximum power boost amount of the feeding end of the non-co-fed and co-fed dc except the faulty dc in the feeding end power grid and a maximum power surplus that can be borne by the power grid where the receiving end to which the feeding end is connected is located; according to the blocking amount of the fault direct current, the third power lifting total amount of the transmitting end and the maximum power surplus delta P which can be born by the transmitting end power grid Surplus send end The control measures adopted by the direct current group at the transmitting end comprise:
determining the third power lifting total amount P of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-identical transmitting and receiving type direct current except the fault direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid where the receiving end connected with the transmitting end is positioned up3 feeding Wherein the third power boost total amount P of the transmitting end up3 feeding The calculation formula of (2) is as follows:
in the power grid of the receiving end connected with the transmitting end of the non-concurrent transmitting same-receiving type direct current except the fault direct current in the transmitting end power grid, k power grids are arranged in totalWherein the maximum power surplus which can be born by the j-th receiving-end power grid is delta P' Surplus receiver j The number of the sending ends connected with the receiving end of the j-th receiving end power grid in the non-simultaneous sending and receiving type direct current except the fault direct current in the sending end power grid is n, and the i-th is P updci sends j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is the total number of non-simultaneous transmission and simultaneous reception direct currents except fault direct currents in a transmission end power grid;
comparing the DC blocking amount P of the fault DC Locking conveyer The third power of the transmitting end is increased by the total amount P up3 feeding And maximum power surplus delta P which can be born by a power transmission end power grid Surplus send end Wherein, when P Locking conveyer ≤P up3 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer The method comprises the steps of carrying out a first treatment on the surface of the When (when)
P up3 feeding ＜P Locking conveyer ≤P up3 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up3 feeding And ensure the power boost P of the DC group at the transmitting end up3 feeding After that, the power grid at the transmitting end stably operates; when P Locking conveyer ＞P up3 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up3 feeding And the power grid at the transmitting end adopts a cutting measure, and the cutting amount P is calculated Cutting machine feeding ＝P Locking conveyer -P Lifting and conveying device -ΔP Surplus send end 。
5. The method of claim 1, wherein when the fault dc is a receiving-end non-co-feeding and co-receiving dc, determining a third power boost total of the receiving-end according to a maximum power boost amount of the receiving-end of the non-co-feeding and co-receiving dc except the fault dc in the receiving-end power grid and a maximum power shortage that can be borne by the power grid where the receiving-end connected receiving-end is located; according to the blocking amount of the fault direct current, the third power lifting total amount of the receiving end and the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency The control measures adopted by the receiving end direct current group comprise:
according to the most of the receiving ends of the non-concurrent sending same-type direct current except the fault direct current in the receiving-end power grid The high-power lifting amount and the maximum power shortage which can be born by the power grid where the transmitting end connected with the receiving end is positioned determine the third power lifting total amount P of the transmitting end up3 receptor Wherein the total amount P of the three power boosting of the receiving end up3 receptor The calculation formula of (2) is as follows:
in the formula, k power grids of the receiving end of the non-same-transmission-type direct current except the fault direct current are in total, wherein the maximum power shortage which can be born by the j power grid of the receiving end is delta P' Shortage delivery end j The number of the receiving ends connected with the j-th power grid in the non-concurrent transmission and co-reception type direct current except the fault direct current in the receiving end power grid is n, and the i is P updci is subjected to j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is the total number of non-concurrent sending and concurrent receiving direct currents except fault direct currents in a receiving-end power grid;
comparing the DC blocking amount P of the fault DC Locking conveyer The third power of the receiving end is increased by the total amount P up3 receptor And the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency Wherein, when P Locking conveyer ≤P up3 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor The method comprises the steps of carrying out a first treatment on the surface of the When P up3 receptor ＜P Locking receptor ≤P up3 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up3 receptor And ensure the power boost P of the DC group at the transmitting end up3 receptor After that, the receiving end power grid stably operates; when P Locking receptor ＞P up3 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up3 receptor And the receiving end power grid adopts load shedding measures, and the load shedding quantity P Load shedding ＝P Locking receptor -P Lifting the subject -ΔP Receiving terminal for deficiency 。
6. A dc group control system for multi-dc joint modulation, where the dc group controlled by the system includes a transmitting dc group of a dc transmitting power grid and a receiving dc group of a dc receiving power grid, where the connected dc in the transmitting dc group and the receiving dc group are identical transmitting and receiving dc, the direct in the transmitting dc group is not connected to the receiving dc group, and the direct in the receiving dc group is not connected to the transmitting dc group is different transmitting and receiving dc, and the system is characterized in that:
the direct current fault unit is used for determining the type of direct current with direct current blocking faults, wherein the direct current with direct current blocking is fault direct current, and the type of the fault direct current is any one of a sending end co-sending same-receiving direct current, a receiving end co-sending same-receiving direct current, a sending end non-co-sending same-receiving direct current and a receiving end non-co-sending same-receiving direct current;
The first control unit is used for determining the first power lifting total amount of the transmitting end according to the maximum power lifting amount of the co-transmitting and co-receiving direct current except the fault direct current in the transmitting end power grid when the fault direct current is the transmitting end co-transmitting and co-receiving direct current; determining a second power lifting total amount of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-type direct current in the transmitting end power grid and the maximum power surplus which can be born by the power grid of the receiving end connected with the transmitting end; determining control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total amount of the first power lifting of the sending end, the total amount of the second power lifting of the sending end and the maximum power surplus which can be born by a sending end power grid;
the second control unit is used for determining the first power lifting total amount of the receiving end according to the maximum power lifting amount of the co-fed and co-fed direct current except the fault direct current in the receiving end power grid when the fault direct current is the receiving end co-fed and co-fed direct current; determining a second power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending same-type direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the sending end connected with the receiving end; determining control measures adopted by the receiving-end direct current group according to the blocking quantity of the fault direct current, the total quantity of the first power lifting of the receiving end, the total quantity of the second power lifting of the receiving end and the maximum power shortage which can be born by a receiving-end power grid;
The third control unit is used for determining the third power lifting total amount of the sending end according to the maximum power lifting amount of the sending end of the non-concurrent sending and concurrent receiving type direct current except the fault direct current in the sending end power grid and the maximum power surplus born by the power grid where the receiving end connected with the sending end is located when the fault direct current is the sending end non-concurrent sending and concurrent receiving type direct current; determining control measures adopted by the sending end direct current group according to the blocking amount of the fault direct current, the total lifting amount of the third power of the sending end and the maximum power surplus which can be born by a sending end power grid;
the fourth control unit is used for determining the third power lifting total amount of the receiving end according to the maximum power lifting amount of the receiving end of the non-concurrent sending and concurrent receiving type direct current except the fault direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid where the sending end connected with the receiving end is located when the fault direct current is the receiving end non-concurrent sending and concurrent receiving type direct current; according to the blocking amount of the fault direct current, the third power lifting total amount of the receiving end and the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency And determining control measures adopted by the receiving end direct current group.
7. The system of claim 6, wherein the first control unit comprises:
the power transmission end first power unit is used for determining the total power lifting amount P of the power transmission end according to the maximum power lifting amount of the same-transmission same-type direct current except the fault direct current in the power transmission end power grid up1 feeding Wherein the first power boost total amount P of the transmitting end up1 feeding The maximum power rise of the same-sending same-receiving direct current except the fault direct current in the sending end direct current group is equal to the sum of the maximum power rise of the same-sending same-receiving direct current except the fault direct current;
the power transmission end second power unit is used for determining the total power lifting amount P of the power transmission end second power according to the maximum power lifting amount of the power transmission end of the non-identical power transmission same-type direct current in the power transmission end power grid and the maximum power surplus which can be born by the power transmission end connected power grid where the power transmission end is positioned up2 feeding Wherein the second power boost total amount P of the transmitting end up2 feeding The calculation formula of (2) is as follows:
in the formula, k power grids of receiving ends connected with different sending and receiving type direct current sending ends in the power grid of the sending end are provided, wherein the maximum power surplus bearable by the j-th receiving end power grid is delta P' Surplus receiver j The number of the transmitting ends connected with the receiving end of the j-th receiving end power grid in the non-simultaneous transmitting same-receiving direct current is n, and the i-th is P updci sends j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is more than or equal to 1 and less than or equal to N, and N is the total number of non-simultaneous transmission and direct current in a transmission end power grid;
a first switching control unit for comparing the DC blocking amount P of the fault DC Locking conveyer The total power of the transmitting end is increased by the total power P up1 feeding The second power of the transmitting end is increased by the total amount P up2 feeding And maximum power surplus delta P which can be born by a power transmission end power grid Surplus send end Wherein, when P Locking conveyer ≤P up1 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer To supplement unbalanced power of the receiving-end power grid; when P up1 feeding ＜P Locking conveyer ≤P up1 feeding +P up2 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer To supplement unbalanced power of the receiving-end power grid; when P up1 feeding +P up2 feeding ＜P Locking conveyer ≤P up1 feeding +P up2 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up1 feeding +P up2 feeding And ensure the power boost P of the DC group at the transmitting end up1 feeding +P up2 feeding After that, the power grid at the transmitting end stably operates; when P Locking conveyer ＞P up1 feeding +P up2 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up1 feeding +P up2 feeding And the power grid at the transmitting end adopts a cutting measure, and the cutting amount P is calculated Cutting machine feeding ＝P Locking conveyer -P Lifting and conveying device -ΔP Surplus send end 。
8. The system of claim 6, wherein the second control unit comprises;
first at the receiving endThe power unit is used for determining the first power lifting total amount P of the receiving end according to the maximum power lifting amount of the co-current and co-current receiving direct current except the fault direct current in the receiving end power grid up1 receptor Wherein the receiving end first power boost total amount P up1 receptor The maximum power rise of the same-transmission and same-reception type direct current except the fault direct current in the reception end direct current group is equal to the sum of the maximum power rise of the same-transmission and same-reception type direct current except the fault direct current;
the receiving end second power unit is used for determining the total quantity P of the second power lifting of the receiving end according to the maximum power lifting quantity of the receiving end of the non-co-transmission same-type receiving direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid where the receiving end is connected with the receiving end up2 receptor Wherein the second power boost total amount P of the receiving end up2 receptor The calculation formula of (2) is as follows:
in the formula, k power grids of the power grid where the power grid of the receiving end is connected with the non-same power grid of the receiving end is, wherein the maximum power shortage which can be born by the j power grid of the receiving end is delta P' Shortage delivery end j The number of the receiving ends connected with the power grid of the j-th transmitting end in the non-simultaneous transmitting and same receiving type direct current is n, and the i-th is P updci is subjected to j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is the total number of non-simultaneous transmission and simultaneous reception direct currents in a receiving-end power grid;
a first load control unit for comparing the DC blocking amount P of the fault DC Locking conveyer The total power of the receiving end is increased by the total power P up1 receptor The second power of the receiving end is increased by the total amount P up2 receptor And the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency Wherein, when P Locking conveyer ≤P up1 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor To supplement unbalanced power of the power grid at the transmitting end; when P up1 receptor ＜P Locking receptor ≤P up1 receptor +P up2 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor To supplement unbalanced power of the power grid at the transmitting end; when P up1 receptor +P up2 receptor ＜P Locking receptor ≤P up1 receptor +P up2 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up1 receptor +P up2 receptor And ensure the power boost P of the DC group at the transmitting end up1 receptor +P up2 receptor After that, the receiving end power grid stably operates; when P Locking receptor ＞P up1 receptor +P up2 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up1 receptor +P up2 receptor And the receiving end power grid adopts load shedding measures, and the load shedding quantity P Load shedding ＝P Locking receptor -P Lifting the subject -ΔP Receiving terminal for deficiency 。
9. The system of claim 6, wherein the third control unit comprises:
the third power unit of the transmitting end is used for determining the third power lifting total amount P of the transmitting end according to the maximum power lifting amount of the transmitting end of the non-concurrent transmitting same-receiving direct current except fault direct current in the transmitting end power grid and the maximum power surplus bearable by the power grid where the receiving end connected with the transmitting end is located up3 feeding Wherein the third power boost total amount P of the transmitting end up3 feeding The calculation formula of (2) is as follows:
in the formula, k power grids of receiving ends of the non-same-transmission-type and same-receiving-type direct current except fault direct current in the power grid of the transmitting end are in total, wherein the maximum power surplus bearable by the j-th receiving-end power grid is delta P' Surplus receiver j The number of the sending ends connected with the receiving end of the j-th receiving end power grid in the non-simultaneous sending and receiving type direct current except the fault direct current in the sending end power grid is n, and the i-th is P updci sends j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is the total number of non-simultaneous transmission and simultaneous reception direct currents except fault direct currents in a transmission end power grid;
a second cutter control unit for comparingDC blocking value P of more faulty DC Locking conveyer The third power of the transmitting end is increased by the total amount P up3 feeding And maximum power surplus delta P which can be born by a power transmission end power grid Surplus send end Wherein, when P Locking conveyer ≤P up3 feeding At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P Locking conveyer The method comprises the steps of carrying out a first treatment on the surface of the When P up3 feeding ＜P Locking conveyer ≤P up3 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up3 feeding And ensure the power boost P of the DC group at the transmitting end up3 feeding After that, the power grid at the transmitting end stably operates; when P Locking conveyer ＞P up3 feeding +ΔP Surplus send end At the time, the power rise P of the DC group at the transmitting end Lifting and conveying device Equal to P up3 feeding And the power grid at the transmitting end adopts a cutting measure, and the cutting amount P is calculated Cutting machine feeding ＝P Locking conveyer -P Lifting and conveying device -ΔP Surplus send end 。
10. The system of claim 6, wherein the fourth control unit comprises:
the receiving end third power unit is used for determining the total power lifting amount P of the sending end third power according to the maximum power lifting amount of the receiving end of the non-synchronous sending same-receiving direct current except the fault direct current in the receiving end power grid and the maximum power shortage which can be born by the power grid of the sending end connected with the receiving end up3 receptor Wherein the total amount P of the three power boosting of the receiving end up3 receptor The calculation formula of (2) is as follows:
in the formula, k power grids of the receiving end of the non-same-transmission-type direct current except the fault direct current are in total, wherein the maximum power shortage which can be born by the j power grid of the receiving end is delta P' Shortage delivery end j The number of the receiving ends connected with the j-th power grid in the non-concurrent transmission and co-reception type direct current except the fault direct current in the receiving end power grid is n, and the i is P updci is subjected to j J is more than or equal to 1 and less than or equal to k, i is more than or equal to 1 and less than or equal to N, N is the total number of non-concurrent sending and concurrent receiving direct currents except fault direct currents in a receiving-end power grid;
A second load control unit for comparing the DC blocking amount P of the fault DC Locking conveyer The third power of the receiving end is increased by the total amount P up3 receptor And the maximum power shortage delta P which can be born by the receiving end power grid Receiving terminal for deficiency Wherein, when P Locking conveyer ≤P up3 receptor At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P Locking receptor The method comprises the steps of carrying out a first treatment on the surface of the When P up3 receptor ＜P Locking receptor ≤P up3 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up3 receptor And ensure the power boost P of the DC group at the transmitting end up3 receptor After that, the receiving end power grid stably operates; when P Locking receptor ＞P up3 receptor +ΔP Receiving terminal for deficiency At the time, the power rise P of the receiving end DC group Lifting the subject Equal to P up3 receptor And the receiving end power grid adopts load shedding measures, and the load shedding quantity P Load shedding ＝P Locking receptor -P Lifting the subject -ΔP Receiving terminal for deficiency 。
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105305450A (en) * 2015-12-02 2016-02-03 中国电力科学研究院 Power grid AC/DC cooperation control method after direct current block fault
CN109980674A (en) * 2019-04-12 2019-07-05 内蒙古电力（集团）有限责任公司内蒙古电力经济技术研究院分公司 A kind of same sending end is the same as receiving end multiple-circuit line transmission power control method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105305450A (en) * 2015-12-02 2016-02-03 中国电力科学研究院 Power grid AC/DC cooperation control method after direct current block fault
CN109980674A (en) * 2019-04-12 2019-07-05 内蒙古电力（集团）有限责任公司内蒙古电力经济技术研究院分公司 A kind of same sending end is the same as receiving end multiple-circuit line transmission power control method

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