CN111509729A - Multi-level reactive compensation cooperative control method and device for urban rail transit - Google Patents

Multi-level reactive compensation cooperative control method and device for urban rail transit Download PDF

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CN111509729A
CN111509729A CN202010225504.9A CN202010225504A CN111509729A CN 111509729 A CN111509729 A CN 111509729A CN 202010225504 A CN202010225504 A CN 202010225504A CN 111509729 A CN111509729 A CN 111509729A
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reactive power
compensation
power
reactive
urban rail
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郭敏
姚知洋
金庆忍
陈卫东
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Electric Power Research Institute of Guangxi Power Grid Co Ltd
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Electric Power Research Institute of Guangxi Power Grid 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
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/10—Flexible AC transmission systems [FACTS]
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/20—Active power filtering [APF]

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Abstract

The invention discloses a multi-level reactive power compensation cooperative control method and a multi-level reactive power compensation cooperative control device for urban rail transit, wherein the method comprises the following steps: the method comprises the steps of collecting reactive power of a 0.4KV load side of an urban rail voltage reduction station, and analyzing reactive power factors; performing in-situ reactive compensation by using the four-quadrant operation current transformation characteristic of the active filtering module; acquiring reactive power and power factors at 35KV medium voltage sides of a main substation and inlet wires of traction substations; calculating to obtain the reactive power and the required compensation capacity of each compensation section; distributed reactive power compensation is carried out by utilizing the four-quadrant operation current transformation characteristic of the medium-voltage energy feedback module, the command of compensation capacity is sent to the energy feedback modules in the traction substations, and reactive power is output; acquiring reactive power and power factors of a high-voltage side of a main substation; and carrying out centralized reactive power compensation by using a Static Var Generator (SVG). In the implementation of the method, the reactive power of the local area power distribution network is comprehensively and integrally improved.

Description

Multi-level reactive compensation cooperative control method and device for urban rail transit
Technical Field
The invention relates to the technical field of urban rail reactive power compensation, in particular to a multi-level reactive power compensation cooperative control method and device for urban rail transit.
Background
The reactive compensation scheme of the urban rail transit can be divided into three modes of centralized compensation, distributed compensation and local compensation according to the compensation range of the reactive compensation device; the existing reactive power compensation equipment of urban rail transit is mostly limited to the governance of single-point power factor indexes, and when traction load subarea power supply exists in an urban rail transit power supply system, the scheme of installing the reactive power compensation equipment in a large area is not economical. The project gets rid of the thought limited to single-point reactive power compensation in the past, starts from the layer of a local power distribution network, namely an urban rail transit power supply system, and how to use a small amount of compensation equipment arranged at key points to realize the comprehensive and integral promotion of the reactive power of the local power distribution network, so that the project is a more economic and reasonable management thought.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a multi-level reactive power compensation cooperative control method and device for urban rail transit, which realize the comprehensive and integral improvement of the reactive power of a local area power distribution network and are a more economic and reasonable management idea.
In order to solve the technical problem, an embodiment of the present invention provides a multi-level reactive power compensation cooperative control method for urban rail transit, where the method includes:
the method comprises the steps of collecting reactive power of a 0.4KV load side of an urban rail voltage reduction station, and analyzing reactive power factors of the 0.4KV load side of the urban rail voltage reduction station;
based on the reactive power factor of the urban rail voltage reduction station on the 0.4KV load side, the four-quadrant operation current conversion characteristic of the active filter module is utilized to carry out on-site reactive compensation, and a reactive power control command is generated to act on the high-performance active filter module;
the method comprises the steps of collecting reactive power and power factors of a 35KV medium-voltage side of a main substation and collecting reactive power and power factors of incoming lines of traction substations;
according to the reactive power and the power factor of the 35KV medium voltage side of the main substation and the inlet wire of each traction substation, the reactive power and the required compensation capacity of each compensation section are obtained through calculation;
based on the reactive power and the required compensation capacity of each compensation section, distributed reactive compensation is carried out by utilizing the four-quadrant operation current transformation characteristic of the medium-voltage energy feedback module, the instruction of the compensation capacity is sent to the energy feedback modules in the traction substations, and the reactive power is output;
acquiring reactive power and power factors of a high-voltage side of a main substation;
based on the reactive power and the power factor of the high-voltage side of the main substation, a Static Var Generator (SVG) is used for carrying out centralized reactive power compensation, and a reactive power control command is generated to act on the SVG to output reactive power.
Optionally, the acquiring reactive power of the 0.4KV load side of the urban rail voltage reduction station, and analyzing the reactive power factor of the 0.4KV load side of the urban rail voltage reduction station includes: and compensating the reactive power factor of the 0.4kV load side of the urban rail voltage reduction substation to 1, and compensating the power factors of the main substation and the traction substation.
Optionally, the expression for compensating the reactive power factor of the urban rail voltage reduction station on the 0.4kV load side to 1 is as follows:
Qlpn＝Qln；
wherein Q islnReactive power, Q, at the 0.4kV load side of the urban rail step-down stationlpnThe reactive power that needs to be provided for the high performance active filtering module.
Optionally, the acquiring reactive power and power factor at the incoming line of each traction substation includes: the traction substation compensates the power factor of the Nth compensation section during the off-peak operation period to a preset value.
Optionally, the expression that the traction substation compensates the power factor of the nth compensation section to the preset value during the off-peak operation period is as follows:
Qfpn＝Qfln+QfDn+Qftn；
wherein Q isfpnReactive power, Q, to be supplied to the energy-fed moduleflnCompensating reactive power of a traction power supply; qfDnFor compensating reactive power generated by the cable；QftnFor reactive compensation of buck.
Optionally, the performing centralized reactive power compensation by using the static var generator SVG based on the reactive power and the power factor of the high-voltage side of the main substation includes: and calculating to obtain the total reactive compensation power required by the high-voltage side of the main substation based on the reactive power and the power factor of the high-voltage side of the main substation.
Optionally, a specific calculation formula of the total reactive compensation power required by the high-voltage side of the main substation is as follows:
Figure RE-GDA0002554133170000031
wherein Q isjpTotal reactive compensation power, Q, required for the high-voltage side of the main substationjIs the reactive power, lambda, of the high-voltage side of the main substationjIs the power factor, lambda, of the high-voltage side of the main substationrCompensating the power factor of the Nth compensation section during off-peak operation period to a value of a preset value for the traction substation.
In addition, the embodiment of the invention also provides a multi-level reactive power compensation cooperative control device for urban rail transit, which comprises:
urban rail step-down station data acquisition module: the system is used for collecting the reactive power of the 0.4KV load side of the urban rail voltage reduction station and analyzing the reactive power factor of the 0.4KV load side of the urban rail voltage reduction station;
an active filtering module: the system is used for carrying out on-site reactive power compensation by utilizing the four-quadrant operation conversion characteristic of the active filtering module based on the reactive power factor of the urban rail voltage reduction station on the 0.4KV load side, and generating a reactive power control command to act on the high-performance active filtering module;
the main substation and traction substation data acquisition module: the system is used for acquiring reactive power and power factors of the 35KV medium-voltage side of the main substation and acquiring reactive power and power factors of the incoming lines of all traction substations; according to the reactive power and the power factor of the 35KV medium voltage side of the main substation and the inlet wire of each traction substation, the reactive power and the required compensation capacity of each compensation section are obtained through calculation;
the medium-voltage energy feedback module: the system comprises a medium voltage energy feedback module, an energy feedback module, a power supply module and a power supply module, wherein the medium voltage energy feedback module is used for operating four-quadrant operation current conversion characteristics to perform distributed reactive power compensation based on reactive power and required compensation capacity of each compensation section, sending an;
the main substation high-voltage side data acquisition module: the system is used for acquiring reactive power and power factors of the high-voltage side of the main substation;
static var generator SVG: the method is used for carrying out centralized reactive power compensation by utilizing the Static Var Generator (SVG) based on the reactive power and the power factor of the high-voltage side of the main substation, and generating a reactive power control command to act on the SVG to output reactive power.
Optionally, the data acquisition module of urban rail voltage reduction station further includes: the system is used for compensating the reactive power factor of the urban rail voltage reduction station on the 0.4kV load side to 1 and compensating the power factors of the main substation and the traction substation.
Optionally, the data acquisition module of the main substation and the traction substation further includes: compensating, by the traction substation, a power factor of an Nth compensation zone during off-peak operation to a preset value.
In the implementation of the invention, an in-situ compensation mode is adopted, and the harmonic suppression and reactive compensation can be carried out on inductive loads such as rectifier bridge loads, motors and the like which are related to urban rail voltage reduction by utilizing the four-quadrant operation current transformation characteristic of the active filter module APF; the medium-voltage network is divided into a plurality of compensation sections by adopting a distributed compensation mode, the compensation capacity in each compensation section is distributed, and the energy feedback module carries out reactive compensation according to the distributed compensation capacity, so that the power factor of the line in each compensation section meets the requirement, and an ideal reactive compensation effect is achieved; by adopting a centralized compensation mode, the SVG is utilized to perform reactive compensation on other loads of a main transformer station and the main transformer, so that the urban rail power supply system meets the power factor requirement, and the power factor check penalty of the power supply system is avoided; the comprehensive integral improvement of the reactive power of the local area power distribution network is realized, and the comprehensive integral improvement is a more economic and reasonable treatment idea.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of an urban rail transit multi-level reactive power compensation cooperative control method according to an embodiment of the present invention;
fig. 2 is a schematic structural composition diagram of an urban rail transit multi-level reactive power compensation cooperative control device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1, fig. 1 is a schematic flow chart of a multi-level reactive power compensation cooperative control method for urban rail transit according to an embodiment of the present invention.
As shown in fig. 1, a multi-level reactive compensation cooperative control method for urban rail transit includes:
s11: the method comprises the steps of collecting reactive power of a 0.4KV load side of an urban rail voltage reduction station, and analyzing reactive power factors of the 0.4KV load side of the urban rail voltage reduction station;
in the specific implementation process of the invention, the collecting the reactive power of the 0.4KV load side of the urban rail voltage reduction station, and the analyzing the reactive power factor of the 0.4KV load side of the urban rail voltage reduction station comprises: and compensating the reactive power factor of the 0.4kV load side of the urban rail voltage reduction substation to 1, and compensating the power factors of the main substation and the traction substation.
Specifically, the expression for compensating the reactive power factor of the urban rail voltage reduction side to 1 at 0.4kV load side is as follows:
Qlpn＝Qln； (5.4-2)
wherein Q islnReactive power, Q, at the 0.4kV load side of the urban rail step-down stationlpnThe reactive power that needs to be provided for the high performance active filtering module.
S12: based on the reactive power factor of the urban rail voltage reduction station on the 0.4KV load side, the four-quadrant operation current conversion characteristic of the active filter module is utilized to carry out on-site reactive compensation, and a reactive power control command is generated to act on the high-performance active filter module;
it should be noted that, on the basis of the reactive power factor of the urban rail voltage reduction station at the 0.4KV load side, local reactive compensation is performed by using the four-quadrant operation conversion characteristic of the active filter module, and a reactive power control command is generated to act on the high-performance active filter module, and the part is mainly used for reactive compensation of inductive loads such as a rectifier bridge load and a motor.
S13: the method comprises the steps of collecting reactive power and power factors of a 35KV medium-voltage side of a main substation and collecting reactive power and power factors of incoming lines of traction substations;
in the specific implementation process of the invention, the step of acquiring the reactive power and the power factor at the inlet wire of each traction substation comprises the following steps: the traction substation compensates the power factor of the Nth compensation section in the off-peak operation period to a preset value, wherein the preset value is lambdar。
Specifically, the expression that the traction substation compensates the power factor of the nth compensation section to the preset value in the off-peak operation period is as follows:
Qfpn＝Qfln+QfDn+Qftn； (5.4-3)
wherein Q isfpnReactive power, Q, to be supplied to the energy-fed moduleflnCompensating reactive power of a traction power supply; qfDnFor compensating cable generationThe reactive power of (c); qftnFor reactive compensation of buck.
According to the reactive power Q sent by the collected traction power supplyfnAnd power factor lambda1Calculating QflnThe expression of (a) is:
Figure RE-GDA0002554133170000061
according to the reactive power Q sent out by the medium voltage side of the main substationzAnd power factor lambdazAccording to the formula (5.4-5), the total reactive power Q generated on the medium-voltage looped network transmission cable can be calculatedD。
Figure RE-GDA0002554133170000062
The total reactive compensation power Q required on the medium-voltage looped network transmission cable can be calculated according to the formula (5.4-6)fDThe expression is as follows:
Figure RE-GDA0002554133170000063
the capacitive reactive generated on the cable is proportional to the length of the cable, and the expression is:
Figure RE-GDA0002554133170000064
wherein the total length of the medium voltage network cable is D,
Figure RE-GDA0002554133170000065
according to the reactive power Q generated by the collected voltage reductiontnAnd power factor lambdatCalculating QftnThe expression of (a) is:
Figure RE-GDA0002554133170000066
thus, formula (5.4-3) can be rewritten as:
Figure RE-GDA0002554133170000067
wherein, it is noted that the cable length lnThe expression of (a) is:
Figure RE-GDA0002554133170000068
in the formula, DnRepresenting the length of the cable between two adjacent stations,/nRepresenting the cable length of the compensating section.
S14: according to the reactive power and the power factor of the 35KV medium voltage side of the main substation and the inlet wire of each traction substation, the reactive power and the required compensation capacity of each compensation section are obtained through calculation;
s15: based on the reactive power and the required compensation capacity of each compensation section, distributed reactive compensation is carried out by utilizing the four-quadrant operation current transformation characteristic of the medium-voltage energy feedback module, the instruction of the compensation capacity is sent to the energy feedback modules in the traction substations, and the reactive power is output;
it should be noted that, based on the reactive power and the required compensation capacity of each compensation section, distributed reactive power compensation is performed by using the four-quadrant operation conversion characteristics of the medium-voltage energy feed module, and an instruction of the compensation capacity is sent to the energy feed modules in each traction substation, and the reactive power is output.
S16: acquiring reactive power and power factors of a high-voltage side of a main substation;
in the specific implementation process of the invention, the centralized reactive power compensation by using the static var generator SVG based on the reactive power and the power factor at the high-voltage side of the main substation comprises the following steps: and calculating to obtain the total reactive compensation power required by the high-voltage side of the main substation based on the reactive power and the power factor of the high-voltage side of the main substation.
Specifically, a specific calculation formula of the total reactive compensation power required by the high-voltage side of the main substation is as follows:
Figure RE-GDA0002554133170000071
wherein Q isjpTotal reactive compensation power, Q, required for the high-voltage side of the main substationjIs the reactive power, lambda, of the high-voltage side of the main substationjIs the power factor, lambda, of the high-voltage side of the main substationrCompensating the power factor of the Nth compensation section during off-peak operation period to a value of a preset value for the traction substation.
S17: based on the reactive power and the power factor of the high-voltage side of the main substation, a Static Var Generator (SVG) is used for carrying out centralized reactive power compensation, and a reactive power control command is generated to act on the SVG to output reactive power.
It should be noted that, based on the reactive power and the power factor on the high-voltage side of the main substation, the static var generator SVG is used for performing centralized reactive power compensation, and a reactive power control command is generated to act on the static var generator SVG to output reactive power.
In specific implementation, reactive control instructions of the active filter module APF, the medium-voltage energy feed module and the static var generator SVG can be calculated through the formulas (5.4-2), (5.4-9) and (5.4-10), and are issued by a monitoring center of a main substation to coordinately control the active filter module APF, the medium-voltage energy feed module and the static var generator SVG in the urban rail power supply system, so that centralized-distributed-local multi-level reactive compensation coordinated control is realized, the power factor assessment requirement of a power supply enterprise on the urban rail traffic power supply system is met, a certain dynamic reactive reserve is reserved at the same time to meet the emergency requirement of the system, and the efficient operation of the urban rail traffic power supply system is realized.
In the implementation of the invention, an in-situ compensation mode is adopted, and the harmonic suppression and reactive compensation can be carried out on inductive loads such as rectifier bridge loads, motors and the like which are related to urban rail voltage reduction by utilizing the four-quadrant operation current transformation characteristic of the active filter module APF; the medium-voltage network is divided into a plurality of compensation sections by adopting a distributed compensation mode, the compensation capacity in each compensation section is distributed, and the energy feedback module carries out reactive compensation according to the distributed compensation capacity, so that the power factor of the line in each compensation section meets the requirement, and an ideal reactive compensation effect is achieved; by adopting a centralized compensation mode, the SVG is utilized to perform reactive compensation on other loads of a main transformer station and the main transformer, so that the urban rail power supply system meets the power factor requirement, and the power factor check penalty of the power supply system is avoided; the comprehensive integral improvement of the reactive power of the local area power distribution network is realized, and the comprehensive integral improvement is a more economic and reasonable treatment idea.
Examples
Referring to fig. 2, fig. 2 is a schematic structural composition diagram of an urban rail transit multi-level reactive power compensation cooperative control device according to an embodiment of the present invention.
As shown in fig. 2, the urban rail transit multi-level reactive power compensation cooperative control device includes:
urban rail step-down station data acquisition module 11: the system is used for collecting the reactive power of the 0.4KV load side of the urban rail voltage reduction station and analyzing the reactive power factor of the 0.4KV load side of the urban rail voltage reduction station;
in the specific implementation process of the present invention, the data acquisition module 11 of the urban rail voltage reduction station further includes: the system is used for compensating the reactive power factor of the urban rail voltage reduction station on the 0.4kV load side to 1 and compensating the power factors of the main substation and the traction substation.
Active filtering module 12: the system is used for carrying out on-site reactive power compensation by utilizing the four-quadrant operation conversion characteristic of the active filtering module based on the reactive power factor of the urban rail voltage reduction station on the 0.4KV load side, and generating a reactive power control command to act on the high-performance active filtering module;
the main substation and traction substation data acquisition module 13: the system is used for acquiring reactive power and power factors of the 35KV medium-voltage side of the main substation and acquiring reactive power and power factors of the incoming lines of all traction substations; according to the reactive power and the power factor of the 35KV medium voltage side of the main substation and the inlet wire of each traction substation, the reactive power and the required compensation capacity of each compensation section are obtained through calculation;
in the specific implementation process of the present invention, the main substation and traction substation data acquisition module 13 further includes: compensating, by the traction substation, a power factor of an Nth compensation zone during off-peak operation to a preset value.
The medium voltage energy feed module 14: the system comprises a medium voltage energy feedback module, an energy feedback module, a power supply module and a power supply module, wherein the medium voltage energy feedback module is used for operating four-quadrant operation current conversion characteristics to perform distributed reactive power compensation based on reactive power and required compensation capacity of each compensation section, sending an;
the main substation high-voltage side data acquisition module 15: the system is used for acquiring reactive power and power factors of the high-voltage side of the main substation;
static var generator SVG 16: the method is used for carrying out centralized reactive power compensation by utilizing the Static Var Generator (SVG) based on the reactive power and the power factor of the high-voltage side of the main substation, and generating a reactive power control command to act on the SVG to output reactive power.
Specifically, the working principle of the device related function module according to the embodiment of the present invention may refer to the related description of the method embodiment, and is not described herein again.
In the implementation of the invention, the harmonic suppression and reactive compensation of inductive loads such as rectifier bridge loads, motors and the like which are related to urban rail voltage reduction can be realized by utilizing the four-quadrant operation current transformation characteristic of the active filter module APF; the medium-voltage network is divided into a plurality of compensation sections by adopting a distributed compensation mode, the compensation capacity in each compensation section is distributed, and the energy feedback module carries out reactive compensation according to the distributed compensation capacity, so that the power factor of the line in each compensation section meets the requirement, and an ideal reactive compensation effect is achieved; by adopting a centralized compensation mode, the SVG is utilized to perform reactive compensation on other loads of a main transformer station and the main transformer, so that the urban rail power supply system meets the power factor requirement, and the power factor check penalty of the power supply system is avoided; the comprehensive integral improvement of the reactive power of the local area power distribution network is realized, and the comprehensive integral improvement is a more economic and reasonable treatment idea.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic or optical disk, or the like.
In addition, the method and the device for multi-level reactive power compensation cooperative control of urban rail transit provided by the embodiment of the invention are described in detail, a specific embodiment is adopted herein to explain the principle and the implementation manner of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A multi-level reactive compensation cooperative control method for urban rail transit is characterized by comprising the following steps:
the method comprises the steps of collecting reactive power of a 0.4KV load side of an urban rail voltage reduction station, and analyzing reactive power factors of the 0.4KV load side of the urban rail voltage reduction station;
based on the reactive power factor of the urban rail voltage reduction station on the 0.4KV load side, the four-quadrant operation current conversion characteristic of the active filter module is utilized to carry out on-site reactive compensation, and a reactive power control command is generated to act on the high-performance active filter module;
the method comprises the steps of collecting reactive power and power factors of a 35KV medium-voltage side of a main substation and collecting reactive power and power factors of incoming lines of traction substations;
according to the reactive power and the power factor of the 35KV medium voltage side of the main substation and the inlet wire of each traction substation, the reactive power and the required compensation capacity of each compensation section are obtained through calculation;
based on the reactive power and the required compensation capacity of each compensation section, distributed reactive compensation is carried out by utilizing the four-quadrant operation current transformation characteristic of the medium-voltage energy feedback module, the instruction of the compensation capacity is sent to the energy feedback modules in the traction substations, and the reactive power is output;
acquiring reactive power and power factors of a high-voltage side of a main substation;
based on the reactive power and the power factor of the high-voltage side of the main substation, a Static Var Generator (SVG) is used for carrying out centralized reactive power compensation, and a reactive power control command is generated to act on the SVG to output reactive power.
2. The urban rail transit multi-level reactive power compensation cooperative control method according to claim 1, wherein the collecting reactive power at a 0.4KV load side of an urban rail step-down facility and analyzing reactive power factors at the 0.4KV load side of the urban rail step-down facility comprises: and compensating the reactive power factor of the 0.4kV load side of the urban rail voltage reduction substation to 1, and compensating the power factors of the main substation and the traction substation.
3. The urban rail transit multi-level reactive power compensation cooperative control method according to claim 2, wherein the expression for compensating the reactive power factor of the urban rail voltage reduction side of 0.4kV to 1 is as follows:
Qlpn＝Qln；
wherein Q islnReactive power, Q, at the 0.4kV load side of the urban rail step-down stationlpnThe reactive power that needs to be provided for the high performance active filtering module.
4. The urban rail transit multi-level reactive power compensation cooperative control method according to claim 1, wherein the collecting of reactive power and power factors at the incoming line of each traction substation comprises: the traction substation compensates the power factor of the Nth compensation section during the off-peak operation period to a preset value.
5. The urban rail transit multi-level reactive power compensation cooperative control method according to claim 4, wherein the expression that the traction substation compensates the power factor of the Nth compensation section during the off-peak operation period to the preset value is as follows:
Qfpn＝Qfln+QfDn+Qftn；
wherein Q isfpnReactive power, Q, to be supplied to the energy-fed moduleflnCompensating reactive power of a traction power supply; qfDnReactive power generated for compensating the cable; qftnFor reactive compensation of buck.
6. The urban rail transit multi-level reactive power compensation cooperative control method according to claim 1, wherein the centralized reactive power compensation using Static Var Generators (SVG) based on the reactive power and power factor of the high-voltage side of the main substation comprises: and calculating to obtain the total reactive compensation power required by the high-voltage side of the main substation based on the reactive power and the power factor of the high-voltage side of the main substation.
7. The urban rail transit multi-level reactive compensation cooperative control method according to claim 1, wherein a specific calculation formula of total reactive compensation power required by the high-voltage side of the main substation is as follows:
Figure FDA0002427500970000021
wherein Q isjpTotal reactive compensation power, Q, required for the high-voltage side of the main substationjIs the reactive power, lambda, of the high-voltage side of the main substationjIs the power factor, lambda, of the high-voltage side of the main substationrCompensating the power factor of the Nth compensation section during off-peak operation period to a value of a preset value for the traction substation.
8. The urban rail transit multi-level reactive compensation cooperative control device is characterized by comprising:
urban rail step-down station data acquisition module: the system is used for collecting the reactive power of the 0.4KV load side of the urban rail voltage reduction station and analyzing the reactive power factor of the 0.4KV load side of the urban rail voltage reduction station;
an active filtering module: the system is used for carrying out on-site reactive power compensation by utilizing the four-quadrant operation conversion characteristic of the active filtering module based on the reactive power factor of the urban rail voltage reduction station on the 0.4KV load side, and generating a reactive power control command to act on the high-performance active filtering module;
the main substation and traction substation data acquisition module: the system is used for acquiring reactive power and power factors of the 35KV medium-voltage side of the main substation and acquiring reactive power and power factors of the incoming lines of all traction substations; according to the reactive power and the power factor of the 35KV medium voltage side of the main substation and the inlet wire of each traction substation, the reactive power and the required compensation capacity of each compensation section are obtained through calculation;
the medium-voltage energy feedback module: the system comprises a medium voltage energy feedback module, an energy feedback module, a power supply module and a power supply module, wherein the medium voltage energy feedback module is used for operating four-quadrant operation current conversion characteristics to perform distributed reactive power compensation based on reactive power and required compensation capacity of each compensation section, sending an;
the main substation high-voltage side data acquisition module: the system is used for acquiring reactive power and power factors of the high-voltage side of the main substation;
static var generator SVG: the method is used for carrying out centralized reactive power compensation by utilizing the Static Var Generator (SVG) based on the reactive power and the power factor of the high-voltage side of the main substation, and generating a reactive power control command to act on the SVG to output reactive power.
9. The urban rail transit multi-level reactive power compensation cooperative control device according to claim 8, wherein the urban rail voltage reduction station data acquisition module further comprises: the system is used for compensating the reactive power factor of the urban rail voltage reduction station on the 0.4kV load side to 1 and compensating the power factors of the main substation and the traction substation.
10. The urban rail transit multi-level reactive power compensation cooperative control device according to claim 8, wherein the main substation and traction substation data acquisition module further comprises: compensating, by the traction substation, a power factor of an Nth compensation zone during off-peak operation to a preset value.
CN202010225504.9A 2020-03-26 2020-03-26 Multi-level reactive compensation cooperative control method and device for urban rail transit Pending CN111509729A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2488215Y (en) * 2001-03-28 2002-04-24 西南交通大学 Reactive compensator
CN102882219A (en) * 2012-10-26 2013-01-16 株洲变流技术国家工程研究中心有限公司 Railway power supply system comprehensive electric energy quality treatment device and method thereof
CN104767210A (en) * 2015-04-08 2015-07-08 广西诺思贝电气股份有限公司 Reactive collaborative compensation system and method of power distribution network low voltage circuit
CN105449688A (en) * 2015-12-17 2016-03-30 南京亚派科技股份有限公司 Decoupling control system and method of hybrid reactive compensation system
CN106374529A (en) * 2016-09-26 2017-02-01 国网上海市电力公司 Distributed energy grid connection and reactive compensation composite control method
CN110518597A (en) * 2019-05-16 2019-11-29 北京千驷驭电气有限公司 Reactive-load compensation method, equipment and the computer readable storage medium of middle-voltage network

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2488215Y (en) * 2001-03-28 2002-04-24 西南交通大学 Reactive compensator
CN102882219A (en) * 2012-10-26 2013-01-16 株洲变流技术国家工程研究中心有限公司 Railway power supply system comprehensive electric energy quality treatment device and method thereof
CN104767210A (en) * 2015-04-08 2015-07-08 广西诺思贝电气股份有限公司 Reactive collaborative compensation system and method of power distribution network low voltage circuit
CN105449688A (en) * 2015-12-17 2016-03-30 南京亚派科技股份有限公司 Decoupling control system and method of hybrid reactive compensation system
CN106374529A (en) * 2016-09-26 2017-02-01 国网上海市电力公司 Distributed energy grid connection and reactive compensation composite control method
CN110518597A (en) * 2019-05-16 2019-11-29 北京千驷驭电气有限公司 Reactive-load compensation method, equipment and the computer readable storage medium of middle-voltage network

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
吴继珍: "地铁供电***中有源滤波器技术研究", 《湖南文理学院学报(自然科学版)》 *
秦大伟等: "城市轨道交通供电***无功补偿方案探讨", 《机电信息》 *
詹占岚: "应用于轨道交通的滤波及无功补偿技术研究", 《铁道标准设计》 *

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