CN114039357A - Power distribution network voltage regulation and control system and method based on multi-compensation device coordination control - Google Patents

Power distribution network voltage regulation and control system and method based on multi-compensation device coordination control Download PDF

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CN114039357A
CN114039357A CN202111315918.1A CN202111315918A CN114039357A CN 114039357 A CN114039357 A CN 114039357A CN 202111315918 A CN202111315918 A CN 202111315918A CN 114039357 A CN114039357 A CN 114039357A
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voltage
reactive power
compensation device
limit value
reactive
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唐酿
楚湘辉
黄明欣
曾杰
陈锐
董华梁
黄辉
张弛
张威
高滢
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China Southern Power Grid Power Technology Co Ltd
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China Southern Power Grid Power Technology 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
    • H02J3/12—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load
    • H02J3/16—Circuit arrangements for AC mains or AC distribution networks for adjusting voltage in AC networks by changing a characteristic of the network load by adjustment of reactive power
    • 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
    • H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
    • 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
    • Y02E40/30—Reactive power compensation

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Abstract

一种基于多补偿装置协调控制的配电网电压调控系统及方法，包括：协调控制器、动态补偿装置、无功补偿装置、调压装置；协调控制器分别与动态补偿装置、无功补偿装置、调压装置通讯连接，获取动态补偿装置、无功补偿装置、调压装置采集的线路运行数据，为参与调节的协调控制器、动态补偿装置、无功补偿装置、调压装置分配投切量，并输出对应的控制指令信号；控制指令信号用于对动态补偿装置、无功补偿装置、调压装置进行调节，实现基于多补偿装置协调控制的配电网电压调控。通过协调控制器实现配电线路中各类调节装置的协同运作，全面综合提升了配电线路电能质量，可以解决配电台区电压偏低、无功缺额大等问题，实现输配电线路全线的综合改善。

Figure 202111315918

A distribution network voltage regulation system and method based on coordinated control of multiple compensation devices, comprising: a coordinated controller, a dynamic compensation device, a reactive power compensation device, and a voltage regulation device; the coordinated controller is respectively connected with the dynamic compensation device and the reactive power compensation device. , The communication connection of the voltage regulating device, obtain the line operation data collected by the dynamic compensation device, the reactive power compensation device, and the voltage regulating device, and allocate the switching amount for the coordinated controller, dynamic compensation device, reactive power compensation device, and voltage regulating device participating in the adjustment. , and output the corresponding control command signal; the control command signal is used to adjust the dynamic compensation device, the reactive power compensation device, and the voltage regulation device, so as to realize the voltage regulation of the distribution network based on the coordinated control of multiple compensation devices. By coordinating the controller to realize the coordinated operation of various adjustment devices in the distribution line, the power quality of the distribution line is comprehensively improved, and the problems of low voltage and large reactive power shortage in the distribution station area can be solved, and the entire transmission and distribution line can be realized. comprehensive improvement.

Figure 202111315918

Description

Power distribution network voltage regulation and control system and method based on multi-compensation device coordination control
Technical Field
The application relates to the technical field of power transmission and distribution regulation, in particular to a power distribution network voltage regulation and control system and method based on multi-compensation device coordination control.
Background
In recent years, with the development of economy, the demand for electricity of users is increasing, and the load of a power distribution network is increasing dramatically. The problems of overlong lines, too thin line diameters and the like commonly exist in the power distribution network, so that the line loss of the power distribution network is overlarge, the tail end voltage and the power factor are too low, and the normal power utilization of users is seriously influenced.
At present, the problems of power distribution network loss and power quality of a power distribution network are mainly improved from two aspects of power distribution network transformation and power distribution network operation state change. The transformation of the power distribution network comprises measures of line changing, station area increasing and the like; the change of the running state of the power distribution network comprises measures of adjusting user load, increasing reactive compensation, line voltage regulation and the like. Generally, measures for transforming the power distribution network involve a large amount of investment, and the actual implementation difficulty is high; in the measures for changing the running state of the power distribution network, the user load is difficult to adjust.
Therefore, the measures of changing the operation state of the power distribution network, such as adding reactive power compensation and line voltage regulators, are widely adopted. The device such as reactive compensation, line voltage regulator are additionally arranged, so that reactive power loss can be reduced, the terminal voltage can be increased, loss reduction and voltage quality improvement are realized, the investment cost is relatively low, the implementation is relatively easy, and good local effect can be achieved.
However, in the prior art, various adjusting devices installed on the line operate independently and cannot operate cooperatively, which may cause frequent switching of the compensation device, and since the variation amount of the device caused in the switching process is in a discrete form, large fluctuation and impact may occur in the switching process, which may cause short-time overvoltage or low voltage problems.
In addition, the failure of the adjustment devices to cooperate with each other at various locations of the line may result in an improvement in the local conditions at the installation site, but a deterioration condition occurs upstream or downstream of the installation site, and thus a comprehensive improvement of the entire line of the power transmission and distribution line cannot be achieved.
Disclosure of Invention
Aiming at the problems, the invention provides a power distribution network voltage regulation and control system and method based on multi-compensation device coordination control, so that various compensation devices installed on a power distribution line can work cooperatively, the electric energy quality of the power distribution line is comprehensively improved, the actual problems of low voltage, large reactive power shortage and the like of a power distribution station area are effectively solved, and the comprehensive improvement of the whole line of the power transmission and distribution line is realized.
Based on the purpose, the technical scheme provided by the application is as follows:
a distribution network voltage regulation and control system based on multi-compensation device coordinated control comprises:
the system comprises a coordination controller, a dynamic compensation device, a reactive compensation device and a voltage regulation device;
the controller is in communication connection with the dynamic compensation device, the reactive compensation device and the voltage regulating device respectively to acquire line operation data acquired by the dynamic compensation device, the reactive compensation device and the voltage regulating device;
the coordination controller comprises a voltage reactive power calculation module and a coordination control module;
the coordination control module comprises a sensitivity calculation unit and a coordination control unit;
the voltage reactive power calculation module is used for calculating physical quantity according to the line operation data; the physical quantities comprise voltage U, reactive power Q and voltage deviation delta U;
the sensitivity calculation unit is used for solving a reactive demand delta Q according to the physical quantity;
the coordination control unit is used for distributing switching quantities for the coordination controller, the dynamic compensation device, the reactive compensation device and the voltage regulating device which participate in regulation according to the voltage deviation delta U and the reactive demand delta Q, determining a dynamic regulation quantity QS of the dynamic compensation device, a switching group number k of the reactive compensation device and a voltage regulating gear n of the voltage regulating device, and outputting corresponding control instruction signals;
the control instruction signal is used for adjusting the dynamic compensation device, the reactive compensation device and the voltage regulating device, so that the voltage regulation and control of the power distribution network based on the coordination control of the multiple compensation devices are realized.
Preferably:
the line operation data comprises one or more of voltage, current, power factor, active physical quantity and reactive physical quantity.
Preferably:
the dynamic compensation device comprises a static synchronous compensator of the power distribution network.
Preferably:
the reactive power compensation device comprises an intelligent capacitor.
Preferably:
the voltage regulating device comprises a distribution transformer arranged at the head end of the line and an intelligent voltage regulator arranged at the tail end of the line.
A power distribution network voltage regulation and control method based on multi-compensation device coordination control is applied to any one of the power distribution network voltage regulation and control systems, and the method comprises the following steps:
acquiring line operation data collected by the dynamic compensation device, the reactive compensation device and the voltage regulation device;
calculating physical quantity according to the line operation data; the physical quantities comprise voltage U, reactive power Q and voltage deviation delta U; determining the regulation types of voltage and reactive power participating in regulation according to the physical quantity and a preset rule base, and solving a reactive power demand quantity delta Q;
distributing switching quantities for the coordination controller, the dynamic compensation device, the reactive compensation device and the voltage regulating device which participate in regulation according to the voltage deviation delta U and the reactive demand delta Q, determining a dynamic regulation quantity QS of the dynamic compensation device, a switching group number k of the reactive compensation device and a voltage regulating gear n of the voltage regulating device, and outputting corresponding control instruction signals;
the control instruction signal is used for adjusting the dynamic compensation device, the reactive compensation device and the voltage regulating device, so that the voltage regulation and control of the power distribution network based on the coordination control of the multiple compensation devices are realized.
Preferably:
the line operation data comprises one or more of voltage, current, power factor, active physical quantity and reactive physical quantity.
Preferably, the determining the regulation type of the voltage and reactive power participation regulation according to the physical quantity and a preset rule base includes:
the rule base divides a plane into nine areas according to a preset voltage upper limit value, a preset voltage lower limit value, a preset reactive upper limit value and a preset reactive lower limit value, and when the collected voltage real-time value and the collected reactive real-time value fall into different areas, the regulation types of voltage and reactive power participating in regulation are determined by adopting a nine-area graph control method;
the nine-zone map control method comprises the following steps:
when the voltage real-time value exceeds the voltage upper limit value and the reactive real-time value is lower than the reactive lower limit value, the voltage regulating device is regulated to reduce the voltage;
when the voltage real-time value is between the voltage upper limit value and the voltage lower limit value and the reactive real-time value is lower than the reactive lower limit value, reactive power is increased;
when the voltage real-time value is lower than the voltage lower limit value and the reactive real-time value is lower than the reactive lower limit value in a reactive mode, reactive boosting is added;
when the voltage real-time value is lower than the voltage lower limit value and the reactive real-time value is between the reactive upper limit value and the reactive lower limit value, adjusting the voltage regulating device to boost the voltage;
when the voltage real-time value is lower than the voltage lower limit value and the reactive real-time value does not exceed the reactive upper limit value, adjusting the voltage regulating device to boost voltage;
when the voltage real-time value is between the voltage upper limit value and the voltage lower limit value and the reactive real-time value is reactive and exceeds the reactive upper limit value, reducing reactive power;
when the voltage real-time value exceeds the voltage upper limit value and the reactive real-time value does not exceed the reactive upper limit value, reducing reactive power;
when the voltage real-time value exceeds the voltage upper limit value and the reactive real-time value is between the reactive upper limit value and the reactive lower limit value, the voltage regulating device is regulated to reduce the voltage;
and when the voltage real-time value is between the voltage upper limit value and the voltage lower limit value and the reactive real-time value is between the reactive upper limit value and the reactive lower limit value, no regulation control is performed.
Preferably, the calculating the reactive demand Δ Q includes:
calculating the sensitivity of the reactive power at the compensation point to the voltage change according to a sensitivity equation of load flow calculation, and further solving the reactive demand delta Q;
the sensitivity equation of the load flow calculation is as follows:
Figure BDA0003343644720000041
wherein, JH、JN、JJ、JLA Jacobian block matrix in a sensitivity equation for the load flow calculation, the Jacobian block matrix having elements of
Figure BDA0003343644720000042
Wherein P, Q, U and theta are respectively the active power, reactive power, voltage amplitude and voltage of the nodeThe phase angle is delta theta, delta U and delta P, delta P and delta Q are respectively the active power deviation and the reactive power deviation of the system;
when the active power is fixed, i.e. Δ P is 0,
Figure BDA0003343644720000051
reduced to Δ Q ═ JLΔU；
According to Δ Q ═ JLAnd delta U, determining the corresponding reactive power deviation when the node voltage is deviated, namely the reactive demand delta Q.
Preferably, the distributing switching amount for the coordination controller, the dynamic compensation device, the reactive compensation device and the voltage regulation device participating in regulation according to the voltage deviation Δ U and the reactive demand Δ Q includes:
if the delta Q is larger than 0, increasing the reactive compensation amount; meanwhile, if QS + delta Q is larger than or equal to QC, a group of reactive compensation devices are put into the reactive compensation device, and the reactive power of the dynamic compensation device is adjusted to QS + delta Q-QC; if QS + delta Q is less than QC, the reactive compensation device is not switched, and the reactive power of the dynamic compensation device is adjusted to QS + delta Q;
if the delta Q is less than 0, reducing the reactive compensation amount; meanwhile, if QS + delta Q is less than or equal to-QC, a group of reactive compensation devices are quitted, and the reactive power of the dynamic compensation devices is adjusted to QS + delta Q + QC; if QS + delta Q > -QC, the reactive power compensation device is not switched, and the reactive power of the dynamic compensation device is adjusted to QS + delta Q;
and the QC is the reactive power output capacity of a group of reactive power compensation devices.
By applying the technical scheme, the power distribution network voltage regulation and control system and method based on multi-compensation device coordination control provided by the application comprise: the system comprises a coordination controller, a dynamic compensation device, a reactive compensation device and a voltage regulation device; the controller is respectively in communication connection with the dynamic compensation device, the reactive compensation device and the voltage regulating device, acquires line operation data collected by the dynamic compensation device, the reactive compensation device and the voltage regulating device, distributes switching amount for the coordination controller, the dynamic compensation device, the reactive compensation device and the voltage regulating device which participate in regulation, and outputs corresponding control instruction signals; the control instruction signal is used for adjusting the dynamic compensation device, the reactive compensation device and the voltage regulating device, so that the voltage regulation and control of the power distribution network based on the coordination control of the multiple compensation devices are realized. This application has realized among the distribution lines dynamic compensation device, reactive power compensator, pressure regulating device's all kinds of adjusting device's cooperative operation through coordinated controller, has comprehensively promoted distribution lines electric energy quality, can effectively solve distribution station district voltage actual problem such as low on the throne, the idle volume is big, realizes the comprehensive improvement of the whole line of transmission and distribution lines.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a power distribution network voltage regulation and control system based on multi-compensation device coordination control according to the present application;
fig. 2 is a schematic flow chart of another power distribution network voltage regulation and control method based on multi-compensation device coordination control according to the present application;
fig. 3 is a schematic diagram of regions partitioned by a nine-region map control method adopted by a rule base according to an embodiment of the present application;
fig. 4 is a power distribution network line structure diagram applied to the power distribution network voltage regulation and control method based on multi-compensation device coordination control according to the embodiment of the present application;
fig. 5 is a schematic voltage reactive power regulation process diagram of a power distribution network voltage regulation method based on multi-compensation device coordination control according to an embodiment of the present application.
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.
The following will specifically describe the scheme of the present application by specific examples:
fig. 1 is a schematic structural diagram of a power distribution network voltage regulation and control system based on multi-compensation device coordination control provided by the present application.
Referring to fig. 1, a power distribution network voltage regulation and control system based on multi-compensation device coordination control according to an embodiment of the present application includes:
the system comprises a coordination controller 1, a dynamic compensation device 2, a reactive compensation device 3 and a voltage regulation device 4;
the controller 1 is respectively in communication connection with the dynamic compensation device 2, the reactive compensation device 3 and the voltage regulation device 4 to acquire line operation data acquired by the dynamic compensation device 2, the reactive compensation device 3 and the voltage regulation device 4;
in an embodiment of the application, the line operation data comprises one or more of voltage, current, power factor, active physical quantity, and reactive physical quantity.
The coordination controller 1 comprises a voltage reactive power calculation module and a coordination control module;
the coordination control module comprises a sensitivity calculation unit and a coordination control unit;
the voltage reactive power calculation module is used for calculating physical quantity according to the line operation data; the physical quantities comprise voltage U, reactive power Q and voltage deviation delta U;
the sensitivity calculation unit is used for solving a reactive demand delta Q according to the physical quantity;
the coordination control unit is used for distributing switching quantities for the coordination controller, the dynamic compensation device, the reactive compensation device and the voltage regulating device which participate in regulation according to the voltage deviation delta U and the reactive demand delta Q, determining a dynamic regulation quantity QS of the dynamic compensation device, a switching group number k of the reactive compensation device and a voltage regulating gear n of the voltage regulating device, and outputting corresponding control instruction signals;
the control instruction signal is used for adjusting the dynamic compensation device, the reactive compensation device and the voltage regulating device, so that the voltage regulation and control of the power distribution network based on the coordination control of the multiple compensation devices are realized.
In the embodiment of the present application, the dynamic compensation device includes a Distribution network Static Synchronous Compensator (D-STATCOM), the reactive compensation device includes an intelligent capacitor, and the voltage regulation device includes a Distribution transformer installed at the head end of the line and an intelligent voltage regulator installed at the tail end of the line. The dynamic compensation device is adjusted by a power electronic device with quick response, and the caused variable quantity is in a continuous form; the reactive compensation device and the voltage regulating device participate in regulation by capacitor switching and voltage regulating gear switching, and the variation caused by the switching is in a discrete form.
Fig. 2 is a schematic flow chart of a power distribution network voltage regulation and control method based on multi-compensation device coordination control provided by the present application.
Referring to fig. 2, a power distribution network voltage regulation and control method based on multi-compensation device coordination control according to an embodiment of the present application is applied to any one of the power distribution network voltage regulation and control systems described above, and the method includes:
s1: acquiring line operation data acquired by a dynamic compensation device, a reactive compensation device and a voltage regulation device, wherein the line operation data comprises physical quantities such as voltage, current, power factors, active power, reactive power and the like;
s2: a voltage reactive power calculation module of the coordination controller analyzes and calculates physical quantities such as voltage, reactive power and the like at the collected positions of all devices of the line according to the obtained line operation data, and determines the type mode of voltage and reactive power participating in regulation according to the calculation result and the collected data and the rules of a rule base;
s3: after the adjustment type is determined, the sensitivity calculation unit of the coordination controller calculates the reactive power demand according to the data processed by the voltage reactive power calculation module;
s4: the coordination control unit of the coordination controller distributes switching amount to the devices participating in regulation according to the calculation results of the step S2 and the step S3 and generates control signals to be output;
s5: and generating control signals and transmitting the control signals to the dynamic compensation device, the reactive compensation device and the voltage regulating device, and enabling the devices to act according to the instructions to complete regulation.
According to the power distribution network voltage regulation and control method based on multi-compensation device coordination control, line operation data collected by a dynamic compensation device, a reactive compensation device and a voltage regulation device are obtained; calculating physical quantity according to the line operation data; the physical quantities comprise voltage U, reactive power Q and voltage deviation delta U; determining the regulation types of voltage and reactive power participating in regulation according to the physical quantity and a preset rule base, and solving a reactive power demand quantity delta Q; distributing switching quantities for the coordination controller, the dynamic compensation device, the reactive compensation device and the voltage regulating device which participate in regulation according to the voltage deviation delta U and the reactive demand delta Q, determining a dynamic regulation quantity QS of the dynamic compensation device, a switching group number k of the reactive compensation device and a voltage regulating gear n of the voltage regulating device, and outputting corresponding control instruction signals; the control instruction signal is used for adjusting the dynamic compensation device, the reactive compensation device and the voltage regulating device, so that the voltage regulation and control of the power distribution network based on the coordination control of the multiple compensation devices are realized. And after the control instruction signal is generated, the control instruction signal is transmitted to the dynamic compensation device, the reactive compensation device and the voltage regulating device to complete regulation.
In an embodiment of the application, the line operation data comprises one or more of voltage, current, power factor, active physical quantity, and reactive physical quantity.
Fig. 3 is a schematic diagram of regions partitioned by a nine-region map control method adopted by a rule base according to an embodiment of the present application.
Referring to fig. 3, in the embodiment of the present application, the determining, according to the physical quantity and a preset rule base, the regulation type of the voltage and reactive power participation regulation includes: the rule base is presetUpper limit value U of voltageHLower limit value of voltage ULReactive upper limit value QHAnd a reactive lower limit value QLDividing a plane into nine areas, and determining the adjustment types of voltage and reactive power participating in adjustment by adopting a nine-area graph control method when the acquired voltage real-time values and reactive power real-time values fall into different areas;
the nine-zone map control method comprises the following steps:
zone 1: when the voltage real-time value exceeds the voltage upper limit value and the reactive real-time value is lower than the reactive lower limit value, the voltage regulating device is regulated to reduce the voltage;
zone 2: when the voltage real-time value is between the voltage upper limit value and the voltage lower limit value and the reactive real-time value is lower than the reactive lower limit value, reactive power is increased;
zone 3: when the voltage real-time value is lower than the voltage lower limit value and the reactive real-time value is lower than the reactive lower limit value in a reactive mode, reactive boosting is added;
zone 4: when the voltage real-time value is lower than the voltage lower limit value and the reactive real-time value is between the reactive upper limit value and the reactive lower limit value, adjusting the voltage regulating device to boost the voltage;
zone 5: when the voltage real-time value is lower than the voltage lower limit value and the reactive real-time value does not exceed the reactive upper limit value, adjusting the voltage regulating device to boost voltage;
zone 6: when the voltage real-time value is between the voltage upper limit value and the voltage lower limit value and the reactive real-time value is reactive and exceeds the reactive upper limit value, reducing reactive power;
zone 7: when the voltage real-time value exceeds the voltage upper limit value and the reactive real-time value does not exceed the reactive upper limit value, reducing reactive power;
zone 8: when the voltage real-time value exceeds the voltage upper limit value and the reactive real-time value is between the reactive upper limit value and the reactive lower limit value, the voltage regulating device is regulated to reduce the voltage;
zone 9: and when the voltage real-time value is between the voltage upper limit value and the voltage lower limit value and the reactive real-time value is between the reactive upper limit value and the reactive lower limit value, no regulation control is performed.
Fig. 4 is a power distribution network line structure diagram applied to the power distribution network voltage regulation and control method based on multi-compensation device coordination control according to the embodiment of the present application.
In this embodiment of the present application, the obtaining the reactive demand Δ Q includes:
the sensitivity calculation unit calculates the sensitivity of the reactive power at the compensation point to the voltage change according to a sensitivity equation of load flow calculation, and then obtains the reactive demand delta Q;
sensitivity generally refers to the sensitivity of the system operation condition characterized by a state vector to the changes of a control vector and a disturbance vector, and the sensitivity equation of the load flow calculation can be expressed as:
Figure BDA0003343644720000101
wherein, JH、JN、JJ、JLA Jacobian block matrix in a sensitivity equation for the load flow calculation, the Jacobian block matrix having elements of
Figure BDA0003343644720000102
P, Q, U and theta are respectively the active power, the reactive power, the voltage amplitude and the voltage phase angle of the node, delta theta is the node voltage phase angle deviation, delta U is the node voltage deviation, and delta P and delta Q are respectively the active power deviation and the reactive power deviation of the system;
when the active power is fixed, i.e. Δ P is 0,
Figure BDA0003343644720000103
considering that the reactance is much larger than the resistance, formula
Figure BDA0003343644720000104
Can be simplified to Δ Q ═ JLΔU；
According to Δ Q ═ JLAnd delta U, determining the corresponding reactive power deviation when the node voltage is deviated, namely the reactive demand delta Q.
Fig. 5 is a schematic voltage reactive power regulation process diagram of a power distribution network voltage regulation method based on multi-compensation device coordination control according to an embodiment of the present application.
In this embodiment, the distributing switching amount of the coordination controller, the dynamic compensation device, the reactive compensation device and the voltage regulation device according to the voltage deviation Δ U and the reactive demand Δ Q for participating in regulation includes:
if the delta Q is larger than 0, increasing the reactive compensation amount; meanwhile, if QS + delta Q is larger than or equal to QC, a group of reactive compensation devices are put into the reactive compensation device, and the reactive power of the dynamic compensation device is adjusted to QS + delta Q-QC; if QS + delta Q is less than QC, the reactive compensation device is not switched, and the reactive power of the dynamic compensation device is adjusted to QS + delta Q;
if the delta Q is less than 0, reducing the reactive compensation amount; meanwhile, if QS + delta Q is less than or equal to-QC, a group of reactive compensation devices are quitted, and the reactive power of the dynamic compensation devices is adjusted to QS + delta Q + QC; if QS + delta Q > -QC, the reactive power compensation device is not switched, and the reactive power of the dynamic compensation device is adjusted to QS + delta Q;
and the QC is the reactive power output capacity of a group of reactive power compensation devices.
For example, when distributing the switching amount, based on the online sensitivity calculation, the reactive power to be compensated is distributed between the discrete variable and the continuous variable according to the coordination principle of "discrete variable priority action and continuous variable fine adjustment", and the coordination between the discrete variable and the continuous variable is performed according to the following principle:
if the reactive output of the STATCOM is QS, the reactive power output capacity of one group of capacitors is QC (if no capacitor can be put into the STATCOM at this time, QC is ∞), and Δ Q is the reactive demand caused by the voltage deviation;
1) if the delta Q is larger than 0, increasing the reactive compensation amount;
firstly, if QS + delta Q is larger than or equal to QC, a group of capacitors is put into the STATCOM, and meanwhile, the reactive power of the STATCOM is adjusted to QS + delta Q-QC;
if QS + delta Q is less than QC, the capacitor is not switched, and the STATCOM reactive power is adjusted to QS + delta Q;
2) if the delta Q is less than 0, reducing the reactive compensation amount;
if QS + delta Q is less than or equal to-QC, a group of capacitors is withdrawn, and meanwhile, the reactive power of the STATCOM is adjusted to QS + delta Q + QC;
and if QS + delta Q > -QC, the capacitor is not switched, and the STATCOM reactive power is adjusted to QS + delta Q.
In the embodiment of the application, the dynamic compensation device has a rapid adjustment capability, the voltage of the power distribution network line is maintained to be stable through rapid intervention in the switching transient process of the reactive compensation device and the voltage regulating device, the power compensation device and the voltage regulating device enter a steady-state working state, the dynamic compensation device adjusts output power to be in a smaller state along with the steady-state working state, and sufficient reactive capacity is reserved for the dynamic compensation device to participate in next adjustment.
The method for regulating and controlling the voltage of the power distribution network based on the multi-compensation-device coordination control provided by the embodiment of the application is applied to the system for regulating and controlling the voltage of the power distribution network based on the multi-compensation-device coordination control provided by the embodiment, and specific steps can be referred to in a one-to-one correspondence manner with functions of all modules of the system in the embodiment.
By applying the technical scheme, the application provides a distribution network voltage regulation and control system based on multi-compensation device coordination control, which comprises: the system comprises a coordination controller, a dynamic compensation device, a reactive compensation device and a voltage regulation device; the controller is respectively in communication connection with the dynamic compensation device, the reactive compensation device and the voltage regulating device, acquires line operation data collected by the dynamic compensation device, the reactive compensation device and the voltage regulating device, distributes switching amount for the coordination controller, the dynamic compensation device, the reactive compensation device and the voltage regulating device which participate in regulation, and outputs corresponding control instruction signals; the control instruction signal is used for adjusting the dynamic compensation device, the reactive compensation device and the voltage regulating device, so that the voltage regulation and control of the power distribution network based on the coordination control of the multiple compensation devices are realized. This application has realized among the distribution lines dynamic compensation device, reactive power compensator, pressure regulating device's all kinds of adjusting device's cooperative operation through coordinated controller, has comprehensively promoted distribution lines electric energy quality, can effectively solve distribution station district voltage actual problem such as low on the throne, the idle volume is big, realizes the comprehensive improvement of the whole line of transmission and distribution lines.
Compared with the prior art, the invention has the beneficial effects that:
(1) various adjusting devices of circuit have been realized: the dynamic compensation device, the reactive compensation device and the voltage regulation device work cooperatively, so that the voltage quality of the whole line is improved;
(2) the dynamic compensation device is organically matched with the voltage regulator and the capacitor, the discrete equipment acts preferentially, the continuous equipment is finely adjusted, the line voltage is ensured to be stable by means of the quick adjustment capability of the dynamic compensation device, the frequent switching and the large-amplitude fluctuation impact during the switching of the voltage regulator and the capacitor are avoided, and meanwhile, after the voltage regulator and the capacitor are put into stability, the compensation force of the dynamic compensation device is reduced, enough allowance is reserved, and voltage support can be provided for the next voltage fluctuation.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The power distribution network voltage regulation and control system and method based on multi-compensation device coordination control provided by the invention are introduced in detail, a specific example is applied in the text to explain the principle and the implementation mode 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)

1.一种基于多补偿装置协调控制的配电网电压调控系统，其特征在于，包括：1. a distribution network voltage regulation system based on the coordinated control of multiple compensation devices, is characterized in that, comprising: 协调控制器、动态补偿装置、无功补偿装置、调压装置；Coordinate controller, dynamic compensation device, reactive power compensation device, voltage regulating device; 所述协调控制器分别与所述动态补偿装置、所述无功补偿装置、所述调压装置通讯连接，获取所述动态补偿装置、所述无功补偿装置、所述调压装置采集的线路运行数据；The coordination controller is respectively connected in communication with the dynamic compensation device, the reactive power compensation device, and the voltage regulating device, and obtains the lines collected by the dynamic compensation device, the reactive power compensation device, and the voltage regulating device. Operating data; 所述协调控制器包括电压无功计算模块和协调控制模块；The coordinated controller includes a voltage reactive power calculation module and a coordinated control module; 所述协调控制模块包括灵敏度计算单元和协调控制单元；The coordinated control module includes a sensitivity calculation unit and a coordinated control unit; 所述电压无功计算模块用于根据所述线路运行数据对物理量进行计算；所述物理量包括电压U、无功功率Q和电压偏差ΔU；The voltage and reactive power calculation module is used for calculating physical quantities according to the line operation data; the physical quantities include voltage U, reactive power Q and voltage deviation ΔU; 所述灵敏度计算单元用于根据所述物理量求取无功需求量ΔQ；The sensitivity calculation unit is used to obtain the reactive power demand ΔQ according to the physical quantity; 所述协调控制单元用于根据所述电压偏差ΔU和所述无功需求量ΔQ为参与调节的所述协调控制器、所述动态补偿装置、所述无功补偿装置、所述调压装置分配投切量，确定所述动态补偿装置的动态调节量QS、所述无功补偿装置的投切组数k、所述调压装置的调压档位n，并输出对应的控制指令信号；The coordinated control unit is configured to allocate to the coordinated controller, the dynamic compensation device, the reactive power compensation device, and the voltage regulation device participating in the adjustment according to the voltage deviation ΔU and the reactive power demand ΔQ Switching quantity, determine the dynamic adjustment quantity QS of the dynamic compensation device, the switching group number k of the reactive power compensation device, and the voltage regulating gear position n of the voltage regulating device, and output the corresponding control command signal; 所述控制指令信号用于对所述动态补偿装置、所述无功补偿装置、所述调压装置进行调节，实现基于多补偿装置协调控制的配电网电压调控。The control command signal is used to adjust the dynamic compensation device, the reactive power compensation device, and the voltage regulation device, so as to realize the voltage regulation of the distribution network based on the coordinated control of multiple compensation devices. 2.根据权利要求1所述的基于多补偿装置协调控制的配电网电压调控系统，其特征在于：2. The distribution network voltage regulation system based on the coordinated control of multiple compensation devices according to claim 1, is characterized in that: 所述线路运行数据包括电压、电流、功率因数、有功物理量、无功物理量中的一种或多种。The line operation data includes one or more of voltage, current, power factor, active physical quantity, and reactive physical quantity. 3.根据权利要求1所述的基于多补偿装置协调控制的配电网电压调控系统，其特征在于：3. The distribution network voltage regulation system based on the coordinated control of multiple compensation devices according to claim 1, characterized in that: 所述动态补偿装置包括配电网静止同步补偿器。The dynamic compensation device includes a static synchronous compensator of the distribution network. 4.根据权利要求1所述的基于多补偿装置协调控制的配电网电压调控系统，其特征在于：4. The distribution network voltage regulation system based on the coordinated control of multiple compensation devices according to claim 1, characterized in that: 所述无功补偿装置包括智能电容器。The reactive power compensation device includes a smart capacitor. 5.根据权利要求1所述的基于多补偿装置协调控制的配电网电压调控系统，其特征在于：5. The distribution network voltage regulation system based on the coordinated control of multiple compensation devices according to claim 1, characterized in that: 所述调压装置包括安装在线路首端的台区配电变压器和安装在线路末端的智能调压器。The voltage regulating device includes a platform distribution transformer installed at the head end of the line and an intelligent voltage regulator installed at the end of the line. 6.一种基于多补偿装置协调控制的配电网电压调控方法，应用于如权利要求1-5中任意一项所述的配电网电压调控系统，其特征在于，所述方法包括：6. A distribution network voltage regulation method based on coordinated control of multiple compensation devices, applied to the distribution network voltage regulation system according to any one of claims 1-5, wherein the method comprises: 获取动态补偿装置、无功补偿装置、调压装置采集的线路运行数据；Obtain line operation data collected by dynamic compensation device, reactive power compensation device, and voltage regulating device; 根据所述线路运行数据，对物理量进行计算；所述物理量包括电压U、无功功率Q和电压偏差ΔU；根据所述物理量和预设的规则库确定电压和无功参与调节的调节类型，并求取无功需求量ΔQ；Calculate the physical quantities according to the line operation data; the physical quantities include voltage U, reactive power Q and voltage deviation ΔU; determine the adjustment types of voltage and reactive power participation adjustment according to the physical quantities and a preset rule base, and Find the reactive power demand ΔQ; 根据所述电压偏差ΔU和所述无功需求量ΔQ为参与调节的所述协调控制器、所述动态补偿装置、所述无功补偿装置、所述调压装置分配投切量，确定所述动态补偿装置的动态调节量QS、所述无功补偿装置的投切组数k、所述调压装置的调压档位n，并输出对应的控制指令信号；According to the voltage deviation ΔU and the reactive power demand ΔQ, the switching amount is allocated to the coordinated controller, the dynamic compensation device, the reactive power compensation device, and the voltage regulating device participating in the adjustment, and the determination of the The dynamic adjustment amount QS of the dynamic compensation device, the switching group number k of the reactive power compensation device, the voltage regulation gear position n of the voltage regulation device, and output the corresponding control command signal; 所述控制指令信号用于对所述动态补偿装置、所述无功补偿装置、所述调压装置进行调节，实现基于多补偿装置协调控制的配电网电压调控。The control command signal is used to adjust the dynamic compensation device, the reactive power compensation device, and the voltage regulation device, so as to realize the voltage regulation of the distribution network based on the coordinated control of multiple compensation devices. 7.根据权利要求6所述的基于多补偿装置协调控制的配电网电压调控方法，其特征在于：7. The distribution network voltage regulation method based on the coordinated control of multiple compensation devices according to claim 6, characterized in that: 所述线路运行数据包括电压、电流、功率因数、有功物理量、无功物理量中的一种或多种。The line operation data includes one or more of voltage, current, power factor, active physical quantity, and reactive physical quantity. 8.根据权利要求6所述的基于多补偿装置协调控制的配电网电压调控方法，其特征在于，所述根据所述物理量和预设的规则库确定电压和无功参与调节的调节类型，包括：8 . The distribution network voltage regulation method based on the coordinated control of multiple compensation devices according to claim 6 , wherein the regulation type of voltage and reactive power participation regulation is determined according to the physical quantity and a preset rule base, 8 . include: 所述规则库根据预设的电压上限值、电压下限值、无功上限值和无功下限值将平面划分为九个区域，在采集到的电压实时值和无功实时值落在不同的区域时，采用九区图控制法确定电压和无功参与调节的调节类型；The rule base divides the plane into nine areas according to the preset voltage upper limit value, voltage lower limit value, reactive power upper limit value and reactive power lower limit value. In different areas, the nine-zone diagram control method is used to determine the adjustment types of voltage and reactive power involved in adjustment; 所述九区图控制法包括：The nine-zone map control method includes: 在所述电压实时值超越所述电压上限值，且所述无功实时值无功低于所述无功下限值时，调节所述调压装置进行降压；When the voltage real-time value exceeds the voltage upper limit value, and the reactive power real-time value is lower than the reactive power lower limit value, adjusting the voltage regulating device to reduce the voltage; 在所述电压实时值位于所述电压上限值和所述电压下限值之间，且所述无功实时值无功低于所述无功下限值时，增加无功；When the voltage real-time value is between the voltage upper limit value and the voltage lower limit value, and the reactive power of the reactive power real-time value is lower than the reactive power lower limit value, adding reactive power; 在所述电压实时值低于所述电压下限值，且所述无功实时值无功低于所述无功下限值时，增加无功升压；When the voltage real-time value is lower than the voltage lower limit value, and the reactive power real-time value reactive power is lower than the reactive power lower limit value, increase the reactive power boost; 在所述电压实时值低于所述电压下限值，且所述无功实时值位于所述无功上限值和所述无功下限值之间时，调节所述调压装置进行升压；When the voltage real-time value is lower than the voltage lower limit value, and the reactive power real-time value is between the reactive power upper limit value and the reactive power lower limit value, the voltage regulating device is adjusted to increase pressure; 在所述电压实时值低于所述电压下限值，且所述无功实时值无功超越所述无功上限值时，调节所述调压装置进行升压；When the voltage real-time value is lower than the voltage lower limit value, and the reactive power real-time value exceeds the reactive power upper limit value, adjusting the voltage regulating device to boost the voltage; 在所述电压实时值位于所述电压上限值和所述电压下限值之间，且所述无功实时值无功超越所述无功上限值时，减少无功；When the voltage real-time value is between the voltage upper limit value and the voltage lower limit value, and the reactive power real-time value of reactive power exceeds the reactive power upper limit value, reducing reactive power; 在所述电压实时值超越所述电压上限值，且所述无功实时值无功超越所述无功上限值时，减少无功；When the voltage real-time value exceeds the voltage upper limit value, and the reactive power real-time value exceeds the reactive power upper limit value, reducing reactive power; 在所述电压实时值超越所述电压上限值，且所述无功实时值位于所述无功上限值和所述无功下限值之间时，调节所述调压装置进行降压；When the voltage real-time value exceeds the voltage upper limit value, and the reactive power real-time value is between the reactive power upper limit value and the reactive power lower limit value, the voltage regulating device is adjusted to reduce the voltage ; 在所述电压实时值位于所述电压上限值和所述电压下限值之间，且所述无功实时值位于所述无功上限值和所述无功下限值之间时，不进行调节控制。When the voltage real-time value is located between the voltage upper limit value and the voltage lower limit value, and the reactive power real-time value is located between the reactive power upper limit value and the reactive power lower limit value, Adjustment control is not performed. 9.根据权利要求6所述的基于多补偿装置协调控制的配电网电压调控方法，其特征在于，所述求取无功需求量ΔQ，包括：9 . The distribution network voltage regulation method based on the coordinated control of multiple compensation devices according to claim 6 , wherein the obtaining of the reactive power demand ΔQ comprises: 按照潮流计算的灵敏度方程计算补偿点处的无功功率对电压变化的灵敏度，进而求取无功需求量ΔQ；Calculate the sensitivity of the reactive power at the compensation point to the voltage change according to the sensitivity equation of the power flow calculation, and then obtain the reactive power demand ΔQ; 所述潮流计算的灵敏度方程为：
Figure FDA0003343644710000041
The sensitivity equation of the power flow calculation is:
Figure FDA0003343644710000041
 其中，JH、JN、JJ、JL为所述潮流计算的灵敏度方程中的雅克比分块矩阵，所述雅克比分块矩阵中的元素为
Figure FDA0003343644710000042
其中P、Q、U、θ分别为节点的有功功率、无功功率、电压幅值和电压相角，Δθ为节点电压相角偏差量，ΔU为节点电压的偏差量，ΔP、ΔQ分别为系统的有功功率偏差和无功功率偏差；Wherein, J H , J N , J J , and J L are the Jacobian block matrix in the sensitivity equation of the power flow calculation, and the elements in the Jacobian block matrix are
Figure FDA0003343644710000042
Among them, P, Q, U, and θ are the active power, reactive power, voltage amplitude and voltage phase angle of the node, respectively, Δθ is the deviation of the node voltage phase angle, ΔU is the deviation of the node voltage, ΔP, ΔQ are the system voltage, respectively. The active power deviation and reactive power deviation of ; 当有功功率固定，即ΔP＝0时，
Figure FDA0003343644710000043
简化为ΔQ＝JLΔU；When the active power is fixed, that is, when ΔP=0,
Figure FDA0003343644710000043
Simplified as ΔQ=J L ΔU; 根据ΔQ＝JLΔU，确定当节点电压发生偏移时所对应的无功功率偏差，即所述无功需求量ΔQ。According to ΔQ=J L ΔU, the corresponding reactive power deviation when the node voltage is shifted is determined, that is, the reactive power demand ΔQ. 10.根据权利要求9所述的基于多补偿装置协调控制的配电网电压调控方法，其特征在于，所述根据所述电压偏差ΔU和所述无功需求量ΔQ为参与调节的所述协调控制器、所述动态补偿装置、所述无功补偿装置、所述调压装置分配投切量，包括：10 . The distribution network voltage regulation method based on coordinated control of multiple compensation devices according to claim 9 , wherein the coordination of participating in regulation is based on the voltage deviation ΔU and the reactive power demand ΔQ. 11 . The controller, the dynamic compensation device, the reactive power compensation device, and the voltage regulating device distribute the switching amount, including: 若ΔQ>0，增加无功补偿量；同时，若QS+ΔQ≥QC，投入一组所述无功补偿装置，所述动态补偿装置的无功调节到QS+ΔQ－QC；若QS+ΔQ<QC，不投切所述无功补偿装置，所述动态补偿装置的无功调节到QS+ΔQ；If ΔQ>0, increase the amount of reactive power compensation; at the same time, if QS+ΔQ≥QC, put in a group of the reactive power compensation device, and the reactive power of the dynamic compensation device is adjusted to QS+ΔQ-QC; if QS+ΔQ <QC, do not switch the reactive power compensation device, the reactive power of the dynamic compensation device is adjusted to QS+ΔQ; 若ΔQ<0，减少无功补偿量；同时，若QS+ΔQ≤－QC，退出一组无功补偿装置，所述动态补偿装置的无功调节到QS+ΔQ+QC；若QS+ΔQ>－QC，不投切所述无功补偿装置，所述动态补偿装置的无功调节到QS+ΔQ；If ΔQ<0, reduce the amount of reactive power compensation; at the same time, if QS+ΔQ≤-QC, exit a group of reactive power compensation devices, and the reactive power of the dynamic compensation device is adjusted to QS+ΔQ+QC; if QS+ΔQ> -QC, do not switch the reactive power compensation device, the reactive power of the dynamic compensation device is adjusted to QS+ΔQ; 其中，QC为一组所述无功补偿装置的无功功率输出容量。Wherein, QC is the reactive power output capacity of a group of the reactive power compensation devices.
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