CN104037816B - The maximized computational methods of honourable generated output under multi-source generating combining operation mode - Google Patents

Abstract

The present invention relates to a kind of multi-source generating combining operation mode under the maximized computational methods of honourable generated output, belong to new forms of energy access electric power system operation and control technical field.This method sends the nargin of circuit active power and the meritorious upper limit according to wind/photoelectricity, in conjunction with the downward adjustable nargin of active power of automatic generation unit in wind/photoelectricity collection region, the wind light generation calculated under multi-source generating combining operation mode is exerted oneself maximization computational methods.Under the prerequisite ensureing power grid security, excavate the receiving space of electrical network, maximum possible improves wind/solar photovoltaic utilization rate.This method accessible site generates electricity in cooperation scheduling station system at the multi-source containing honourable aqueous vapor that control centre runs, the real-time running status according to current wind energy turbine set/photovoltaic plant of this system and wind/light is enable to send the margin of safety of passage, implement optimum control strategy, to realize different power grid securities, high-quality, economic demand for control.

Description

The maximized computational methods of honourable generated output under multi-source generating combining operation mode

Technical field

The present invention relates to a kind of multi-source generating combining operation mode under the maximized computational methods of honourable generated output, belong to new forms of energy access electric power system operation and control technical field.

Background technology

The feature such as strong randomness, prediction difficulty, anti-peak regulation of wind/light resources makes electric network active scheduling controlling further difficult.How under the prerequisite ensureing power grid security, at utmost utilize wind power/photovoltaic generation assets, wind power/photovoltaic of dissolving as much as possible generating has become one of common challenge that the place, base of each wind power/photovoltaic generating at present electrical network faces.At present, industry has carried out large quantity research to the active power scheduling controlling after wind power/photovoltaic generating access, and obtains a series of investigation and application achievement.Actual field operating experience shows, the quick wind-force/photovoltaic generation scheduling introducing minute level in active power scheduling controlling system controls in real time, and to guarantee power grid security, reducing restriction wind power/photovoltaic power generation loss can play remarkable effect.

At present, engineering actual field lacks for the maximized computational methods of honourable generated output under multi-source generating combining operation mode, result in and brought abandon light owing to underestimating electrical network receivability wind power/photovoltaic generating capacity, reduce the utilance of wind power/photovoltaic generating.

Summary of the invention

The object of the invention is to propose the maximized computational methods of honourable generated output under a kind of multi-source generating combining operation mode, for the wind power/photovoltaic generating access state of lasting tracking electrical network, and the backspin utilizing the whole network to participate in automatic-generation-control unit generates electricity to wind power/photovoltaic of dissolving for nargin, and automatic generation control (hereinafter referred to as AGC) backspin for nargin not enough or wind/light collection region and electrical network connection line section out-of-limit time, start restriction wind power/photovoltaic Generation Control, to ensure power grid security.

The maximized computational methods of honourable generated output under the multi-source generating combining operation mode that the present invention proposes, comprise the following steps:

(1) the active power controller dead band of the interconnection set between electrical network and honourable collection region is in electrical network, the backspin of automatic generation control is respectively for the higher limit in dead band and lower limit with

(2) from the data acquisition and supervisor control of electrical network, obtain current electric grid operation information, operation information comprises the active power total capacity of all automatic-generation-control unit dropped in electrical network the backspin of current all automatic-generation-control unit is for summation the active power instantaneous value of the interconnection between electrical network and honourable collection region and the active power plan value of interconnection between electrical network and honourable collection region

(3) when the active power total capacity of all automatic-generation-control unit dropped in above-mentioned electrical network is greater than zero, namely time, carry out following judgement and calculate:

If the backspin of all automatic-generation-control unit (3-1) dropped in current electric grid is greater than the middle automatic generation control backspin of above-mentioned steps (1) for deadband upper limit for summation, namely the then wind power/photovoltaic generating receivability ability of current electric grid for;

${\mathrm{\Δp}}_{\mathrm{wind}}^{\mathrm{cap}}={\mathrm{\Δp}}_{\mathrm{agc}}^{\mathrm{cap}}-{\mathrm{\Δp}}_{\mathrm{agc}}^{\mathrm{dead},h}$

(3 ?2) if the backspin of all automatic-generation-control unit dropped in current electric grid to be less than in above-mentioned steps (1) automatic generation control backspin for deadband lower limit for summation, namely the then wind power/photovoltaic generating receivability ability of current electric grid for:

${\mathrm{\Δp}}_{\mathrm{wind}}^{\mathrm{cap}}={\mathrm{\Δp}}_{\mathrm{agc}}^{\mathrm{cap}}-{\mathrm{\Δp}}_{\mathrm{agc}}^{\mathrm{dead},l}$

(3 ?3) are if the backspin of all automatic-generation-control unit that drops into of current electric grid is for summation for: then the wind power/photovoltaic generating receivability ability of current electric grid is zero, namely

(4) when the active power total capacity of all automatic-generation-control unit dropped in electrical network equals zero, namely time, then carry out following judgement and calculate:

(4 ?1) are if the active power instantaneous value of the interconnection in above-mentioned steps (2) between electrical network and honourable collection region with interconnection active power controller dead band in above-mentioned steps (1) with the active power plan value of interconnection in above-mentioned steps (2) between there is following relation: the then wind power/photovoltaic generating receivability ability of current electric grid for;

${\mathrm{\Δp}}_{\mathrm{wind}}^{\mathrm{cap}}=(p_{\mathrm{tie}}^{\mathrm{sche}}-p_{\mathrm{tie}}^{\mathrm{dead}})-p_{\mathrm{tie}}^{\mathrm{curr}}$

(4 ?2) are if the active power instantaneous value of the interconnection in above-mentioned steps (2) between electrical network and honourable collection region with interconnection active power controller dead band in above-mentioned steps (1) with the active power plan value of interconnection in above-mentioned steps (2) between there is following relation: the then wind power/photovoltaic generating receivability ability of current electric grid for:

${\mathrm{\Δp}}_{\mathrm{wind}}^{\mathrm{cap}}=(p_{\mathrm{tie}}^{\mathrm{sche}}-p_{\mathrm{tie}}^{\mathrm{dead}})-p_{\mathrm{tie}}^{\mathrm{curr}};$

(4 ?3) are if the active power instantaneous value of the interconnection in above-mentioned steps (2) between electrical network and honourable collection region with interconnection active power controller dead band in above-mentioned steps (1) with the active power plan value of interconnection in above-mentioned steps (2) between there is following relation: then the wind power/photovoltaic generating receivability ability of current electric grid is zero, namely

The maximized computational methods of honourable generated output under the multi-source generating combining operation mode that the present invention proposes, its advantage is: this method sends the nargin of circuit active power and the meritorious upper limit according to wind/photoelectricity, in conjunction with the downward adjustable nargin of active power of automatic generation unit in wind/photoelectricity collection region, the wind light generation calculated under multi-source generating combining operation mode is exerted oneself maximization computational methods.Under the prerequisite ensureing power grid security, excavate the receiving space of electrical network, maximum possible improves wind/solar photovoltaic utilization rate.This method accessible site generates electricity in cooperation scheduling station system at the multi-source containing honourable aqueous vapor that control centre runs, the real-time running status according to current wind energy turbine set/photovoltaic plant of this system and wind/light is enable to send the margin of safety of passage, implement optimum control strategy, to realize different power grid securities, high-quality, economic demand for control.

Embodiment

The maximized computational methods of honourable generated output under the multi-source generating combining operation mode that the present invention proposes, comprise the following steps:

(1) the active power controller dead band of the interconnection set between electrical network and honourable collection region is in electrical network, the backspin of automatic generation control is respectively for the higher limit in dead band and lower limit with generally manually specified by management and running personnel, typical value scope be 5-10 megawatt, typical value be 200-100 megawatt, typical value be respectively 100 ?50 megawatts.

(2) from the data acquisition and supervisor control of electrical network, obtain current electric grid operation information, operation information comprises the active power total capacity of all automatic-generation-control unit dropped in electrical network the backspin of current all automatic-generation-control unit is for summation the active power instantaneous value of the interconnection between electrical network and honourable collection region and the active power plan value of interconnection between electrical network and honourable collection region

(3) when the active power total capacity of all automatic-generation-control unit dropped in above-mentioned electrical network is greater than zero, namely time, carry out following judgement and calculate:

(3 ?1) if the backspin of all automatic-generation-control unit dropped in current electric grid to be greater than in above-mentioned steps (1) automatic generation control backspin for deadband upper limit for summation, namely then characterizing current electric grid has enough automatic generation control active power backspins standby, can continue to receive wind power/photovoltaic generating, the wind power/photovoltaic generating receivability ability of current electric grid for;

${\mathrm{\Δp}}_{\mathrm{wind}}^{\mathrm{cap}}={\mathrm{\Δp}}_{\mathrm{agc}}^{\mathrm{cap}}-{\mathrm{\Δp}}_{\mathrm{agc}}^{\mathrm{dead},h}$

(3 ?2) if the backspin of all automatic-generation-control unit dropped in current electric grid to be less than in above-mentioned steps (1) automatic generation control backspin for deadband lower limit for summation, namely the AGC then characterizing current electric grid gains merit backspin for not enough, needs the generating of restriction wind power/photovoltaic to ensure power grid security, the wind power/photovoltaic generating receivability ability of current electric grid for:

${\mathrm{\Δp}}_{\mathrm{wind}}^{\mathrm{cap}}={\mathrm{\Δp}}_{\mathrm{agc}}^{\mathrm{cap}}-{\mathrm{\Δp}}_{\mathrm{agc}}^{\mathrm{dead},l}$

The negative value calculated represents needs the generating of restriction wind power/photovoltaic.

(3 ?3) are if the backspin of all automatic-generation-control unit that drops into of current electric grid is for summation for: then the wind power/photovoltaic generating receivability ability of current electric grid is zero, namely illustrate and do not need the generating of restriction wind power/photovoltaic can not continue to increase wind power/photovoltaic generating receiving amount.

(4) when the active power total capacity of all automatic-generation-control unit dropped in electrical network equals zero, namely time, then carry out following judgement and calculate:

(4 ?1) are if the active power instantaneous value of the interconnection in above-mentioned steps (2) between electrical network and honourable collection region with interconnection active power controller dead band in above-mentioned steps (1) with the active power plan value of interconnection in above-mentioned steps (2) between there is following relation: then characterizing current electric grid has enough spaces to generate electricity to receive wind power/photovoltaic, the wind power/photovoltaic generating receivability ability of current electric grid for;

${\mathrm{\Δp}}_{\mathrm{wind}}^{\mathrm{cap}}=(p_{\mathrm{tie}}^{\mathrm{sche}}-p_{\mathrm{tie}}^{\mathrm{dead}})-p_{\mathrm{tie}}^{\mathrm{curr}}$

(4 ?2) are if the active power instantaneous value of the interconnection in above-mentioned steps (2) between electrical network and honourable collection region with interconnection active power controller dead band in above-mentioned steps (1) with the active power plan value of interconnection in above-mentioned steps (2) between there is following relation: then characterize the active power that in current net, generator sends excessive, need the generating of restriction wind power/photovoltaic to ensure power grid security, the wind power/photovoltaic generating receivability ability of current electric grid for:

${\mathrm{\Δp}}_{\mathrm{wind}}^{\mathrm{cap}}=(p_{\mathrm{tie}}^{\mathrm{sche}}-p_{\mathrm{tie}}^{\mathrm{dead}})-p_{\mathrm{tie}}^{\mathrm{curr}}$

The negative value calculated represents needs the generating of restriction wind power/photovoltaic.

(4 ?3) are if the active power instantaneous value of the interconnection in above-mentioned steps (2) between electrical network and honourable collection region with interconnection active power controller dead band in above-mentioned steps (1) with the active power plan value of interconnection in above-mentioned steps (2) between there is following relation: then the wind power/photovoltaic generating receivability ability of current electric grid is zero, namely do not need the generating of restriction wind power/photovoltaic can not continue to increase wind power/photovoltaic generating receiving amount.

According to the size of the wind power/photovoltaic generating receivability ability of the above-mentioned current electric grid calculated, the wind power/photovoltaic of current electric grid generating access state is divided into three kinds:

If enter restriction wind power/photovoltaic generating state, current electric grid needs the generating of restriction wind power/photovoltaic to ensure power grid security.

If enter maintenance state; Current electric grid does not need the generating of restriction wind power/photovoltaic can not continue to increase wind power/photovoltaic generating.

If enter and increase wind power/photovoltaic generating state; Current electric grid can continue to receive wind power/photovoltaic generating, reduces the generating of restriction wind power/photovoltaic.

The maximized computational methods of honourable generated output under the multi-source generating combining operation mode that the present invention proposes, the data acquisition wherein related to and supervisor control (SupervisoryControlAndDataAcquisition, SCADA) based on cyber-net communication, monitoring and controlling is carried out to Real-Time Power System Operation States.

The automatic-generation-control unit related in this method, refers in electrical network the generating set participating in automatic generation control.Automatic generation control (AutomaticGenerationControl, AGC) be the adjustment of electric power system active power and the one of FREQUENCY CONTROL, AGC is one of main contents of dispatching automation of electric power systems, utilize the closed-loop control system of the compositions such as side, control centre supervisory control comuter, telecontrol channel, generating set automation device, the frequency of monitoring, adjustment electric power system, to control generator output.

The automatic-generation-control unit backspin related in this method is standby, is used for characterizing maximum the lowered space of unit active power.If the active power currency of unit i is active power lower limit is then the active power backspin of unit i is standby be defined as: $p_i^{\mathrm{cap}}=p_i^{\mathrm{curr}}-p_i^{\min }.$

The backspin of the automatic generation control related in this method is the frequent movement in order to reduce generating set controller for speed governing system for dead band, the Regulation dead-band arranged in the primary frequency modulation control loop of generating set.

The active power controller dead band of the interconnection between the electrical network related in this method and honourable collection region, is the frequent movement in order to reduce network re-active power controller and the interconnection active power dead band arranged.

Claims (1)

1. the maximized computational methods of honourable generated output under multi-source generating combining operation mode, is characterized in that the method comprises the following steps:

(1) the active power controller dead band of the interconnection set between electrical network and honourable collection region is in electrical network, the backspin of automatic generation control is respectively for the higher limit in dead band and lower limit with

(2) from the data acquisition and supervisor control of electrical network, obtain current electric grid operation information, operation information comprises the active power total capacity of all automatic-generation-control unit dropped in electrical network the backspin of current all automatic-generation-control unit is for summation the active power instantaneous value of the interconnection between electrical network and honourable collection region and the active power plan value of interconnection between electrical network and honourable collection region

(3) when the active power total capacity of all automatic-generation-control unit dropped in above-mentioned electrical network is greater than zero, namely time, carry out following judgement and calculate:

If the backspin of all automatic-generation-control unit (3-1) dropped in current electric grid is greater than the middle automatic generation control backspin of above-mentioned steps (1) for deadband upper limit for summation, namely the then wind power/photovoltaic generating receivability ability of current electric grid for;

${\mathrm{\Δp}}_{\mathrm{wind}}^{\mathrm{cap}}={\mathrm{\Δp}}_{\mathrm{agc}}^{\mathrm{cap}}-{\mathrm{\Δp}}_{\mathrm{agc}}^{\mathrm{dead},h}$

(3 ?2) if the backspin of all automatic-generation-control unit dropped in current electric grid to be less than in above-mentioned steps (1) automatic generation control backspin for deadband lower limit for summation, namely the then wind power/photovoltaic generating receivability ability of current electric grid for:

${\mathrm{\Δp}}_{\mathrm{wind}}^{\mathrm{cap}}={\mathrm{\Δp}}_{\mathrm{agc}}^{\mathrm{cap}}-{\mathrm{\Δp}}_{\mathrm{agc}}^{\mathrm{dead},l}$

(3 ?3) are if the backspin of all automatic-generation-control unit that drops into of current electric grid is for summation for: then the wind power/photovoltaic generating receivability ability of current electric grid is zero, namely

(4) when the active power total capacity of all automatic-generation-control unit dropped in electrical network equals zero, namely time, then carry out following judgement and calculate:

(4 ?1) are if the active power instantaneous value of the interconnection in above-mentioned steps (2) between electrical network and honourable collection region with interconnection active power controller dead band in above-mentioned steps (1) with the active power plan value of interconnection in above-mentioned steps (2) between there is following relation: the then wind power/photovoltaic generating receivability ability of current electric grid for;

${\mathrm{\Δp}}_{\mathrm{wind}}^{\mathrm{cap}}=(p_{\mathrm{tie}}^{\mathrm{sche}}-p_{\mathrm{tie}}^{\mathrm{dead}})-p_{\mathrm{tie}}^{\mathrm{curr}}$

(4 ?2) are if the active power instantaneous value of the interconnection in above-mentioned steps (2) between electrical network and honourable collection region with interconnection active power controller dead band in above-mentioned steps (1) with the active power plan value of interconnection in above-mentioned steps (2) between there is following relation: the then wind power/photovoltaic generating receivability ability of current electric grid for:

${\mathrm{\Δp}}_{\mathrm{wind}}^{\mathrm{cap}}=(p_{\mathrm{tie}}^{\mathrm{sche}}-p_{\mathrm{tie}}^{\mathrm{dead}})-p_{\mathrm{tie}}^{\mathrm{curr}};$

(4 ?3) are if the active power instantaneous value of the interconnection in above-mentioned steps (2) between electrical network and honourable collection region with interconnection active power controller dead band in above-mentioned steps (1) with the active power plan value of interconnection in above-mentioned steps (2) between there is following relation: then the wind power/photovoltaic generating receivability ability of current electric grid is zero, namely