Eng. Khaled .H. Al-Walidi Electric Interconnection Expert National Electric Power Co. (NEPCO)

NEPCO

National Electric Power Company , Jordan

Renewable Energy ResourcesConnection aspects, related studies and international

code amendment practice

Eng. Khaled .H. Al-WalidiElectric Interconnection Expert

National Electric Power Co. (NEPCO)

Eng. Issa .I. SleehatTransmission Planning Engineer/ System Planning dep.

National Electric Power Co. (NEPCO)

NEPCO


INTRUDUCTION

As the energy industry moves forward, the use and research into renewable energy resources (RERs) have expanded significantly. Whether it is wind, biomass, or solar, the industry is seeking ways to connect, breakthrough and integrate the newest technologies into their power systems.

As the fuel price and environmental concerns grow, these generation technologies have proven to be an efficient and fiscally sound alternatives for the energy industry.

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INTRUDUCTION

connection of (RERs G) capacity can have a serious effect on the system reliability and power quality. This is caused by the complicated control problem that is introduced onto the system due to a two-source, one-load situation. Moreover, reliability and faults from other parts of the grid, far from the RERs G site can result to operating problems for the RERs G unit. .

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Master Strategy of Energy Sector in JordanIn renewable energy domain

Energy sector strategy has provided for reaching a contribution percentage for renewable energy in total energy mix of about 7% by the year 2015 and 10% by the year 2020 .

Wind: 500 MW up to year 2015.

1200 MW up to year 2020.

Solar: 600 MW up to year 2020.

Bio : (20-50) MW up to year 2020.

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Planned Wind Power Generation Capacity

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Projects under implementation

• wind project in Kamsha (30-40) MW (negotiation).

• wind project in Fujaij (grant submitted by GEF) – 70-100 MW

(bidding)

• 1 MW solar project (Spanish grant).

• Maan solar project – 100 MW (feasibility study phase)

• Haraneh solar project – 20 MW (BOO) (under evaluation)

NEPCO



Complete the studies necessary for the thermal solar energy projects (300-600) MW.

Expand in the use of the solar cells systems to lighting remote areas and in domestic, industrial and commercial uses and electricity generation.

Carry out electricity generation project from the municipal wastes in coordination with GAM and concerned bodies.

Focus search and study on the biogas fuel (Brazilian experience) to be used in covering industrial needs and transport sector.

NEPCO



Create a fund to aid renewable energy projects (and energy rationalization) so that resources of the fund are through:

Treasury allocations. Environment fund (CDM). Amounts from Jordan country project fund and within available

potential. External aids from donors (French agency, German construction

bank, Japanese agency…etc). GEF through World Bank. Any other sources that can be proposed.

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INTERCONNECTION ASPECTS

The connection of these generation capacities on the national networks (Distribution & transmission) has gained significant attention in the past few years as energy industries is seeking for feasible ,effective solutions and public relations regulation acts that define the rights and responsibilities of all parties .

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Standard interconnection rules needed for:-Encourage the application by reducing uncertainty. establish clear and uniform processes and requirements for connecting to the electric utility gridensure that the project interconnection meets the safety and reliability needs of both the energy end-user and the utility. ensure that the costs of interconnection are the same throughout the country.

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Standard interconnection rules address the application process and the technical requirements for interconnecting RERs projects of a specified type and size with the electric grid .

Include some or all parts of the interconnection process, starting from when a potential customer considers submitting an application up to the time when the interconnection agreement is finalized.

Applicant submits completed application form

Request complete Request completeYES

NO

RERs G unit < 2 MW?

YES

Apply the screens for “Fast Track”

Project passes the fast track screens

Sign interconnection agreement

Construction, commissioning and testing; operation

YES

YES

Study ProcessNO

Customer agrees to pay for any

needed upgrades?NO

YES

YES

Withdraw interconnection

request

NO

NO

RER G < 2 MW, meets key codes and standards, meets certification of small generation equipment package

Addition of RER G shall not allow generation on circuit to exceed 15% of the line section annual peak load

RER G project, along with other generation on circuit, shall not

contribute more than 10% to the maximum fault current

Addition of the DG project shall not cause any protective devices to

exceed 87.5% of the short circuit interrupting Capability

Sign interconnection agreement

Construction, commissioning and testing; operation

YES

YES

YES

YES

YESGo to Study

Process

NO

NO

NO

NO

NO

Fast Track Screening

Process

NONO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NONONO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NONONO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

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TSP/DSP Customer Meeting

System impact study

Project rejected

Project not feasible

Study required

Minimum engineering review

System upgrade required

No system upgrade required

Facilities study upgrade

substantial?

Upgrade contract

Upgrade system

Project approved

Execute Interconnection Agreement

Install system, certificate of completion, inspection, commissioning test

Parallel operation

No study required

NoYes

STUDY PROCESS

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Tech. Concerns with Integrating RenewablesPenetrationAffected by utilities' existing generation mix regulating capabilities, load characteristics, resource availability, and correlations between system load and resources.

Additional systems costs imposed by variability and uncertainty may go up with increasing penetration.

Costs are moderate – up to 20-30% Penetration – and depend on balancing authority and market structure

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NEPCO


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Infrastructure CapacityLack of transmission capacity from stranded renewable resources locations.Variable and uncertain generationSolved by Spatial diversity of the resource. Flexible conventional generation. Grid operations and control areas. Limited curtailment for extreme events And at high penetrations possibly storage

Tech. Concerns with Integrating Renewables

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Lack of transmission capacity

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INTERC. Standards and Certification Criteria IEEE 1547 Series Standard for Interconnecting Distributed Resources with Electric Power Systems (including use of IEEE 1547.1 testing protocols to establish conformity) .

IEEE1547.1 Standard Conformance Test Procedures for Equipment Interconnecting Distributed Resources with Electric Power Systems.

IEEE P1547.2 Draft Application Guide for IEEE 1547 Standard for Interconnecting Distributed Resources with Electric Power Systems.

NEPCO


INTERC. Standards and Certification Criteria

IEEE 1547.3 Guide For Monitoring, Information Exchange, and Control of Distributed Resources Interconnected with Electric Power Systems.

IEEE 1547.4 Draft Guide for Design, Operation, and Integration of Distributed Resource Island Systems with Electric Power Systems.

IEEE 1547.5 Draft Technical Guidelines for Interconnection of Electric Power Sources Greater than 10MVA to the Power Transmission Grid

NEPCO


INTERC. Standards and Certification Criteria

IEEE1547.6Draft Recommended Practice For Interconnecting Distributed Resources With Electric Power Systems Distribution Secondary Networks

UL 1741 for equipment certification such as Inverters, Converters, and Controllers for Use in Independent Power Systems

National Electrical Codes

NEPCO


GRID CODES

Grid Codes are designed to cover all technical aspects relating to the connection, operation and use of the transmission system. but the existing grid code requirements may be impossible or irrelevant with respect to the physical aspects and technical capabilities of these generation plants .Many countries are now expending substantial efforts and resources to update their grid codes (in addition to the standard periodic review and revision process) to incorporate realistic and practical (both technically and economically) provisions for RER generation

NEPCO


GRID CODES

Current versions of grid codes and connection requirement documents contain detailed specifications on aspects including, but not limited to, the following:- Operational control (start-up, shut-down, power ramp rates) Power cap & constraints/curtailment Voltage and frequency operating ranges Frequency regulation Reserve Reactive power capability and voltage control Fault ride through Protection

NEPCO


RECOMMENDATIONS

Recommendations for reducing the obstacles for RERs generators embedded in the interconnection process fall into two categories:-

Modifications to interconnection policies and procedures, which would reduce frustrations experienced by generators awaiting interconnection; and Modifications to transmission planning processes, which would make critical interconnection information available to potential generators ahead of time, enabling preliminary analysis to be completed prior to beginning the interconnection process.

NEPCO


Documents

Eng. Khaled .H. Al-Walidi Electric Interconnection Expert National Electric Power Co. (NEPCO)