CN104931802A - Outgoing line load three-phase integration protection, regulation and control method - Google Patents
Outgoing line load three-phase integration protection, regulation and control method Download PDFInfo
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- CN104931802A CN104931802A CN201510133106.3A CN201510133106A CN104931802A CN 104931802 A CN104931802 A CN 104931802A CN 201510133106 A CN201510133106 A CN 201510133106A CN 104931802 A CN104931802 A CN 104931802A
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Abstract
The present invention discloses an outgoing line load three-phase integration protection, regulation and control method which obtains the power consumption data of a user power consumption terminal, determines whether the user power consumption terminal generates the three-phase unbalance according to a three-phase unbalance degree, if the user power consumption terminal is determined to generate the three-phase unbalance, carries out the three-phase balance degree optimization on the user power consumption terminal according to a preset balance parameter and the three-phase unbalance degree. By the above technical scheme, the balance of cooperating the three-phase load can be realized, the anomalous change of power supply voltage and current is prevented from burning out the power consumption equipment, at the same time, the line loss is reduced effectively. Meanwhile, a multi-stage line loss statistics analysis method of public transformer power supply range-outgoing line branch-branch single phase-terminal load can be formed to analyze the line loss data and specific gravity of each stage and position the line loss reasons accurately, and the elaborate line loss management measures can be made for various conditions, such as overload operation, three-phase load unbalance, electricity steal, electric leakage, inaccurate metering, etc., thereby improving the electric energy utilization efficiency.
Description
Technical field
The present invention relates to the technical field of power distribution network, particularly relate to one and go out specific electric load three-phase set one-tenth protection regulate and control method.
Background technology
Along with the widespread use of Power Electronic Technique at electric power and the access of all kinds of novel electric power load, a large amount of non-linear, impact, wavy load is added in electric power system, cause power network current, voltage waveform that distortion and harmonic pollution occur, three-phase imbalance is on the rise, electric energy loss is caused to increase the weight of, the security of power consumption equipment reduces, and weakens reliability and the economy of operation of power networks.China to the research of intelligent grid with relatively evening of start to walk is discussed, but the research and development of concrete intelligent power grid technology and application aspect substantially and advanced international standard synchronous.The above electrical network of China's local level all achieves dispatching automation, 35 more than kV transformer stations substantially all achieve the integrated automation of transformation stations, You200Duo Ge prefecture-level city has built electrical power distribution automatization system, specially become for 10kV and brought negative Ore-controlling Role into, 10kV public affairs become and end loads includes electricity centralized meter-reading system in.But the 380V distribution line wide and the most complicated to distribution, current all not good means carry out comprehensive automation management.
Tradition " quartile damages " management mainly for still 10kV and Above Transmission Lines, Gong Biantai district 0.4kV distribution line loss is also carry out holistic management according to platform district, and often 0.4kV low-voltage distribution network is that line loss accounts for the largest percentage, it is also the part lacking direct ladder of management most He have greatest improvement space.
Summary of the invention
The present invention proposes one and goes out specific electric load three-phase set one-tenth protection regulate and control method, can realize the balance coordinating three-phase load, prevents the ANOMALOUS VARIATIONS of supply voltage and electric current and burn consumer, effectively reduce line loss simultaneously.
The present invention realizes above-mentioned purpose like this:
One goes out specific electric load three-phase set and becomes protection regulate and control method, it is characterized in that, comprises the following steps:
First, the electricity consumption data of user power utilization terminal are obtained;
Then, according to described tri-phase unbalance factor, judge whether described user power utilization terminal three-phase imbalance occurs;
As judged user power utilization terminal generation three-phase imbalance, then according to the balance parameters preset and described tri-phase unbalance factor, the optimization of three-phase equilibrium degree is carried out to described user power utilization terminal.
Wherein, the tri-phase unbalance factor calculating described user power utilization terminal obtains according to the three phase power of electricity consumption data; As tri-phase unbalance factor exceedes default threshold value, then determine described user power utilization terminal generation three-phase imbalance.
Wherein, the balance parameters that described basis is preset and described tri-phase unbalance factor, the optimization of three-phase equilibrium degree is carried out to described user power utilization terminal, be specially: according to the balance parameters preset and described tri-phase unbalance factor, calculate balance three-phase load, calculate each migration electricity relative to balance three-phase load again, according to described migration electricity, the optimization of three-phase equilibrium degree is carried out to user terminal.
Wherein, when judging user power utilization terminal generation three-phase imbalance, also calculate the residual current of three-phase electricity consumption uncompensated load; According to described residual current, alarm is carried out to described user power utilization terminal.
Wherein, described the optimization of three-phase equilibrium degree is carried out to described user power utilization terminal after, also comprise: show to user the execution result that described three-phase equilibrium degree optimizes, and report the optimization of described three-phase equilibrium degree to described higher level main website.
The invention has the beneficial effects as follows: by obtaining the electricity consumption data of user power utilization terminal, then according to these electricity consumption data, calculating the tri-phase unbalance factor of user power utilization terminal, then according to tri-phase unbalance factor, judging whether user power utilization terminal three-phase imbalance occurs.If so, then according to the balance parameters preset and tri-phase unbalance factor, the optimization of three-phase equilibrium degree is carried out to user power utilization terminal.Technical solution of the present invention can realize the balance coordinating three-phase load, prevents the ANOMALOUS VARIATIONS of supply voltage and electric current and burns consumer, effectively reduces line loss simultaneously.
In addition; of the present invention go out specific electric load three-phase set become the protection line loss of regulate and control method to Gong Biantai district to monitor; line loss statistics is decomposed multistage electricity consumption region further; form the multistage line loss statistical analysis technique of " Gong Biantai district-outlet shunt-single-phase-end loads along separate routes "; according to detailed line loss data; analyze line loss data at different levels and proportion; accurate location line loss reason; respectively for overload operation, three-phase load unbalance, tax evasion electricity and measure the various situations such as inaccurate; formulate the Controlling line loss measure become more meticulous, improve efficiency.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described:
Fig. 1 is schematic flow sheet of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
See Fig. 1, Fig. 1 be provided by the invention go out specific electric load three-phase set become protection regulate and control method schematic flow sheet, the method comprises the following steps:
Step 101: the electricity consumption data obtaining user power utilization terminal.
In the present embodiment, user power utilization terminal gathers the real-time electricity consumption data of subscriber equipment, comprising: the real time data such as the three-phase voltage of high end load, electric current, meritorious, idle, power factor, residual voltage, electric current, active energy, capacity of idle power, Voltage unbalance rate; Maximum load rate, the highest minimum voltage value and time of occurrence, the appearance of the highest minimum current value and time, the highest minimum load value and time of occurrence, rate of qualified voltage, the historical data such as maximum unbalance rate and time.
Power-supply unit obtains the electricity consumption data that this user terminal gathers, thus carries out the optimization of three-phase equilibrium degree according to described electricity consumption data.
Step 102: according to described electricity consumption data, calculates the tri-phase unbalance factor of user power utilization terminal.
In the present embodiment, the present invention, specifically according to the three phase power of electricity consumption data, calculates the tri-phase unbalance factor of user power utilization terminal.For example, in three-phase circuit, due to A, B, the ruuning situation of each circuitry phase of C is inconsistent, causes the effective rate of utilization of circuit not reach maximum, if A, B, C three phase power is respectively Ia, Ib, Ic, then the tri-phase unbalance factor of electric current is [Max(Ia, Ib, Ic)-avg(Ia, Ib, Ic)]/avg(Ia, Ib, Ic), in like manner the tri-phase unbalance factor account form of power is consistent.
Step 103: according to tri-phase unbalance factor, judges whether user power utilization terminal three-phase imbalance occurs.If so, then step 104 is performed, if not, return step 103.
In the present embodiment, judge whether tri-phase unbalance factor exceedes default threshold value, if so, then determine user power utilization terminal generation three-phase imbalance, otherwise, determine that described user terminal is three-phase equilibrium.For example, the threshold value of setting is 20%, if the value of tri-phase unbalance factor is greater than 20%, so this district then needs to be optimized, otherwise this district's electricity consumption situation does not need to be optimized, user can arrange the size of this threshold value according to actual needs, to meet the demand of actual conditions.
Step 104: according to the balance parameters preset and tri-phase unbalance factor, the optimization of three-phase equilibrium degree is carried out to user power utilization terminal.
In the present embodiment, according to the balance parameters preset and described tri-phase unbalance factor, calculate balance three-phase load, then calculate each migration electricity relative to balance three-phase load, according to migration electricity, the optimization of three-phase equilibrium degree is carried out to user terminal.For example, according to A, B, C three-phase load, calculate balance three-phase load, then A, B, C phase will be calculated respectively relative to the migration electricity of balance three-phase load, by the electricity of migration and separate, realize three-phase equilibrium optimization.
In the present embodiment, because all low pressure large users are phase three-wire three or four lines, when therefore optimizing and revising, no longer remind and user moved separate, but reminding user should from certain separate load certain to other separate migrations.
In the present embodiment, judging whether user power utilization terminal three-phase imbalance occurs, and when determining user power utilization terminal generation three-phase imbalance, also comprising: the residual current calculating three-phase electricity consumption uncompensated load, and according to described residual current, alarm and control are carried out to user power utilization terminal.The present invention adopts three-phase power balance control technique, according to the load electricity consumption situation in feedback line loop, in conjunction with the parameter request of coulomb balance, the residual current of the three-phase electricity consumption uncompensated load that customizable permission is recorded separately, carries out corresponding single-phase load alarm and control.
In the present embodiment, remote measurement amount is stored a historical data to analog table by system 5 minutes, compares, can obtain following information according to the termination capacity in these moment and the capacity of user: a, within one day, have the super appearance of how many time point loads; B, super T.T. (total super hold time point * 5 minutes) of holding in one day; C, one day maximum load value are how many.When carrying out alarm to user, can listed for these information form be showed on interface, be drawn as curve simultaneously and show.When user power utilization terminal to the line loss per unit one day of user more than 20%, then " warning " remind, within continuous three days, exceed, provide " power-off " and remind.
In the present embodiment, after the optimization of three-phase equilibrium degree is carried out to described user power utilization terminal, the execution result of described three-phase equilibrium degree optimization can also be shown to user, and superior main website reports the optimization of three-phase equilibrium degree.Higher level main website can carry out statistical study to the data reported of each power-supply unit, according to load customization power regulation technology, the rated capacity that customizable electric intelligent terminal can be declared according to user, setting exceeds electricity consumption ratio and carries out single-phase and Load Regulation that is three-phase, independently can set the amendment that corresponding control mode and controling parameters are carried out in field planting float factor, alarm number of times and the instruction such as reclosing number of times and interval time, and notify client by aural warning.
In the present embodiment, higher level main website can according to reported result statistical line losses situation, according to detailed line loss data, analyze line loss data at different levels and proportion, accurate location line loss reason, respectively for overload operation, three-phase load unbalance, tax evasion electricity and measure the various situations such as inaccurate, formulate the Controlling line loss measure that becomes more meticulous, improve efficiency.
In the present embodiment, have multiple account form, active loss electricity in existing main consideration circuit, line loss calculation comprises meritorious line loss calculation and idle line loss calculation, and has two kinds of account forms.Line loss electricity calculates the mode adopted two kinds, respectively: calculate theoretical line loss according to the parameter such as line length, resistance, be referred to as theory wire loss electricity and calculate, and according to two ends metering circuit in actual track, calculate the circuit of loss in circuit, be referred to as active loss electricity and calculate.
Therefore; the one that the embodiment of the present invention provides goes out specific electric load three-phase set and becomes protection regulate and control method; by obtaining the electricity consumption data of user power utilization terminal; again according to these electricity consumption data; calculate the tri-phase unbalance factor of user power utilization terminal; then according to tri-phase unbalance factor, judge whether user power utilization terminal three-phase imbalance occurs.If so, then according to the balance parameters preset and tri-phase unbalance factor, the optimization of three-phase equilibrium degree is carried out to user power utilization terminal.Technical solution of the present invention can realize the balance coordinating three-phase load, prevents the ANOMALOUS VARIATIONS of supply voltage and electric current and burns consumer, effectively reduces line loss simultaneously.
In addition; of the present invention go out specific electric load three-phase set become the protection line loss of regulate and control method to Gong Biantai district to monitor; line loss statistics is decomposed multistage electricity consumption region further; form the multistage line loss statistical analysis technique of " Gong Biantai district-outlet shunt-single-phase-end loads along separate routes "; according to detailed line loss data; analyze line loss data at different levels and proportion; accurate location line loss reason; respectively for overload operation, three-phase load unbalance, tax evasion electricity and measure the various situations such as inaccurate; formulate the Controlling line loss measure become more meticulous, improve efficiency.
One of ordinary skill in the art will appreciate that all or part of flow process realized in above-described embodiment method, that the hardware that can carry out instruction relevant by computer program has come, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process of the embodiment as above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (5)
1. go out specific electric load three-phase set and become a protection regulate and control method, it is characterized in that, comprise the following steps:
First, the electricity consumption data of user power utilization terminal are obtained;
Then, according to described tri-phase unbalance factor, judge whether described user power utilization terminal three-phase imbalance occurs;
As judged user power utilization terminal generation three-phase imbalance, then according to the balance parameters preset and described tri-phase unbalance factor, the optimization of three-phase equilibrium degree is carried out to described user power utilization terminal.
2. one according to claim 1 goes out specific electric load three-phase set and becomes protection regulate and control method, it is characterized in that: the tri-phase unbalance factor calculating described user power utilization terminal obtains according to the three phase power of electricity consumption data;
As tri-phase unbalance factor exceedes default threshold value, then determine described user power utilization terminal generation three-phase imbalance.
3. one according to claim 1 goes out specific electric load three-phase set and becomes protection regulate and control method; it is characterized in that: the balance parameters that described basis is preset and described tri-phase unbalance factor; the optimization of three-phase equilibrium degree is carried out to described user power utilization terminal; be specially: according to the balance parameters preset and described tri-phase unbalance factor; calculate balance three-phase load; calculate each migration electricity relative to balance three-phase load again, according to described migration electricity, the optimization of three-phase equilibrium degree is carried out to user terminal.
4. one according to claim 1 goes out specific electric load three-phase set and becomes protection regulate and control method, it is characterized in that: when judging user power utilization terminal generation three-phase imbalance, also calculates the residual current of three-phase electricity consumption uncompensated load; According to described residual current, alarm is carried out to described user power utilization terminal.
5. one according to claim 1 goes out specific electric load three-phase set and becomes protection regulate and control method; it is characterized in that: described the optimization of three-phase equilibrium degree is carried out to described user power utilization terminal after; also comprise: the execution result showing the optimization of described three-phase equilibrium degree to user, and report the optimization of described three-phase equilibrium degree to described higher level main website.
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